CN102621750B - Method for improving display quality of liquid crystal panel - Google Patents
Method for improving display quality of liquid crystal panel Download PDFInfo
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Abstract
The invention provides a method for improving display quality of a liquid crystal panel, which comprises that pixel data are input to enable a source to have a source voltage with an alternating current waveform so as to display images; a sharing voltage is adjusted to a first voltage value which enables the screen flickering degree to be minimum; the first voltage value is deviated from a first offset, so that the sharing voltage reaches a second voltage value; the second voltage value and the source voltage are continuously applied to the liquid crystal panel for a preset period of time; and the sharing voltage is adjusted to a third voltage value, a second offset which is not equal to the first offset but is in the same deviating direction as the first offset exists between the third voltage value and the first voltage value, and the third voltage value is used in coordination with the source voltage to display images. The method can solve the problems of poor display quality such as residual images, flickering and the like which occur during the image display process.
Description
Technical Field
The present invention relates to a method for improving the display quality of a liquid crystal panel, and more particularly, to a method for improving the display quality of a liquid crystal panel by applying an electric field to burn mobile ions in a liquid crystal layer onto two sides of a substrate.
Background
The conventional lcd is driven by polarity inversion to avoid the dc blocking effect of the alignment film (alignment film) and the dc residual voltage (DCresidual) caused by the mobile ions (mobile ions) in the liquid crystal cell, so as to prevent the generation of image sticking and poor display quality during the image display process.
Due to the parasitic capacitance effect of the charge-discharge process of the thin-film transistor (thin-film transistor) in the pixel, the charge is redistributed to generate a voltage drop effect, and a kick back voltage (kick back voltage) is generated, so that the positive and negative polarity voltages in the source voltage are asymmetric, and further, the flicker (flicker) and the direct current residual voltage are caused. Conventionally, the influence caused by kickback voltage is compensated by adjusting the voltage level of the common electrode, so that the positive and negative polarity voltages in the source voltage are symmetrical.
In the prior art, the flicker degree of the picture is used as an aid to determine whether the effect of the step voltage plus the kickback voltage in the source voltage is balanced in positive and negative polarities with respect to the voltage of the common electrode, and the adjustment of the common voltage is to minimize the flicker degree of the picture. However, the pixels with low tone are often insufficient in brightness, so that the optical instrument cannot judge the flicker degree, and can only use extrapolation or theoretical calculation. In addition, the determination of the residual image is usually performed by testing a black and white checkerboard picture, and the difference of the accumulation degree of the movable ions in the liquid crystal layer in the black or white area of the picture also affects the accuracy of the adjustment of the shared voltage.
In addition, the judgment of the flicker picture is also influenced by human factors and may be different according to the concentration of the movable ions in the liquid crystal layer, which is difficult to avoid and the concentration of the movable ions in the liquid crystal layer also varies according to the difference of the manufacturing process or the environment. Therefore, there is still much room for improvement in the conventional method of adjusting the voltage level of the common electrode to solve the image sticking.
Disclosure of Invention
The invention aims to provide a method for improving the display quality of a liquid crystal panel, so as to solve the problem of poor display quality such as afterimage and flicker in the picture display process.
In accordance with the aforementioned objects, the present invention provides a method for improving display quality of a liquid crystal panel, the liquid crystal panel includes liquid crystal molecules, a switching element, a pixel electrode and a common electrode, the pixel electrode is electrically connected to a source of the switching element, the common electrode has a common voltage, the source has a source voltage, an electric field formed between the pixel electrode and the common electrode can control the liquid crystal molecules to deflect and further display images, the method includes the following steps:
inputting pixel data to enable the source electrode to have source electrode voltage with alternating current waveform so as to display an image;
adjusting the shared voltage and checking the flicker degree of a display picture so as to adjust the shared voltage to a first voltage value which minimizes the flicker degree of the picture;
further adjusting the common voltage to deviate the common voltage from the first voltage value by a first offset amount to a second voltage value, and continuously applying the common voltage and the source voltage having the second voltage value to the liquid crystal panel for a predetermined time; and
adjusting the shared voltage to a third voltage value, wherein the difference between the third voltage value and the first voltage value is a second offset, the second offset is different from the first offset in size and has the same offset direction, and the shared voltage with the third voltage value is matched with the source voltage to display images.
Another aspect of the present invention provides a method for improving display quality of a liquid crystal panel, the liquid crystal panel includes liquid crystal molecules, a switching element, a pixel electrode and a common electrode, the pixel electrode is electrically connected to a source of the switching element, the common electrode has a common voltage, the source has a source voltage, an electric field formed between the pixel electrode and the common electrode can control the liquid crystal molecules to deflect, and thus display an image, the method includes the following steps:
inputting pixel data to enable the source electrode to have voltage with an alternating current waveform so as to display an image;
adjusting the shared voltage and checking the flicker degree of a display picture so as to adjust the shared voltage to a first voltage value which minimizes the flicker degree of the picture;
further adjusting the common voltage to deviate the common voltage from the first voltage value by a first offset amount to a second voltage value, and continuously applying the common voltage and the source voltage having the second voltage value to the liquid crystal panel for a predetermined time;
adjusting the shared voltage to a third voltage value, wherein the difference between the third voltage value and the first voltage value is a second offset, the second offset is different from the first offset in size and has the same offset direction, and the shared voltage with the third voltage value is matched with the source voltage to display an image; and
and applying a voltage to the common electrode and the source electrode when the liquid crystal panel is in a standby state, and maintaining the common voltage and the source electrode with a bias voltage, wherein the bias voltage has the same direction as the deviation direction of the first offset.
According to the method for improving the display quality of the liquid crystal panel, the liquid crystal panel is processed in a uniform pre-burning mode before the liquid crystal panel is delivered, so that movable ions in the liquid crystal layer are burned on two sides of the substrate, and the problem of poor display quality such as residual images and flicker in the picture display process is solved. The invention also provides a concept of setting the common voltage of the final shipment edition so as to continuously limit the movement of the mobile ions in the liquid crystal layer. In addition, the invention also provides an external electric field to avoid the backflow of the mobile ions when the liquid crystal panel is in a standby state. The invention can make the display product fully achieve the capability of resisting residual images, and is different from the prior method of pursuing materials, components, designs or loop adjustment, and each process needs to be stable.
Drawings
Fig. 1 is a schematic diagram of a pixel structure of a liquid crystal panel according to the method for improving the display quality of the liquid crystal panel provided by the invention.
Fig. 2 is a schematic flow chart of a method for improving display quality of a liquid crystal panel according to the present invention.
Fig. 3 is a schematic view of the assembled liquid crystal module provided by the present invention.
Fig. 4a is a schematic diagram of voltage variation for performing uniform pre-burning by adjusting the common voltage to deviate from the first voltage value with minimized flicker in the frame at an interval of a first deviation amount according to the first embodiment of the present invention.
Fig. 4b is a schematic diagram of voltage variation at intervals of a second deviation amount for adjusting the common voltage of the final shipment edition to deviate from the first voltage value with minimized flicker.
Fig. 4c is a schematic diagram illustrating voltage changes of the liquid crystal panel in the standby state of the first embodiment of the present invention, wherein the voltage changes are generated by applying a dc voltage to the source voltage and the common voltage to generate a bias voltage therebetween.
Fig. 4d is a schematic diagram illustrating voltage changes between the source voltage and the common voltage by applying the dc voltage and the ac voltage to generate the bias voltage when the liquid crystal panel is in the standby state according to the first embodiment of the present invention.
FIG. 5 is a schematic view of a panel that has not been assembled in the manufacturing process of the present invention.
Fig. 6a is a schematic diagram of voltage variation for performing uniform pre-burning by adjusting the common voltage to deviate from the first voltage value with minimized flicker in the image and by a first deviation amount according to the second embodiment of the present invention.
Fig. 6b is a schematic diagram of voltage variation at intervals of a second deviation amount for adjusting the common voltage of the final shipment edition to deviate from the first voltage value with minimized flicker.
Fig. 6c is a schematic diagram illustrating voltage changes of the liquid crystal panel in the standby state of the second embodiment of the present invention, wherein the voltage changes are generated by applying a dc voltage to the source voltage and the common voltage to generate a bias voltage therebetween.
Fig. 6d is a schematic diagram illustrating voltage changes between the source voltage and the common voltage by applying the dc voltage and the ac voltage to generate the bias voltage when the liquid crystal panel is in the standby state according to the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The method for improving the display quality of the liquid crystal panel provided by the invention reduces the density of mobile ions in the liquid crystal layer by applying an electric field so as to solve the problems of afterimage and poor display quality. Fig. 1 is a schematic diagram of a pixel structure of a liquid crystal panel for improving the display quality of the liquid crystal panel according to the method of the present invention. The liquid crystal panel mainly includes a thin film transistor array substrate (TFT array substrate)10, a color filter substrate (CF substrate)20, and a liquid crystal layer 15 disposed between the two substrates 10 and 20. Fig. 1 shows only one pixel structure, which includes a red sub-pixel area 21, a blue sub-pixel area 22 and a green sub-pixel area 23, wherein a pixel electrode 12 is disposed on the tft array substrate 10 corresponding to each sub-pixel area 21, 22, 23, respectively, and a common electrode 28 is disposed on the color filter substrate 20 for providing a common voltage to the liquid crystal panel. In addition, a Black Matrix (BM) 25 is disposed between the sub-pixel regions 21, 22, 23 on the color filter substrate 20 to prevent light leakage from affecting the display. The pixel electrode 12 is generally electrically connected to a source electrode (not shown) of a switching element (e.g., a thin film transistor) on the tft array substrate 10, the source electrode has a source voltage for receiving pixel data, and the liquid crystal panel controls liquid crystal molecules in the liquid crystal layer 15 by an electric field formed between the pixel electrode 12 and the common electrode 28 to deflect the liquid crystal molecules so as to generate different color gradation changes of light to display images. It should be noted that the method for improving the display quality of the liquid crystal panel provided by the present invention is not limited to be applied to the pixel structure shown in fig. 1, and other different types of liquid crystal panels with different pixel structures can be applied to the present invention to achieve the purpose of improving the display quality of the panel.
FIG. 2 is a flow chart illustrating a method for improving the display quality of a liquid crystal panel according to the present invention. Fig. 3 and fig. 4a to 4d are schematic diagrams illustrating a first embodiment of the method for improving the display quality of the liquid crystal panel according to the present invention. Fig. 5 and fig. 6a to 6d are schematic diagrams illustrating a second embodiment of the method for improving the display quality of the liquid crystal panel according to the present invention.
Referring to fig. 2, fig. 3 and fig. 4a to fig. 4d, a first embodiment of the method for improving the display quality of the liquid crystal panel according to the present invention includes the following steps:
step S22: pixel data is input, and the source electrode is enabled to have voltage with alternating current waveform to display images. First of all, the first step is to,
in fig. 3, after the liquid crystal panel is assembled with the backlight module and other optical components to form the liquid crystal module 30, the liquid crystal module 30 can be tested by the detection signal source 42 and the detection power source 44 for displaying images. It should be noted that the present invention only needs to have the image display function after the panel is manufactured, and the panel is not required to be tested after being assembled with other components. In fig. 3, the pixel data can be inputted to the liquid crystal module 30 from the detection signal source 42, and the voltage with ac waveform on the source is used to display the image, i.e. the image is displayed by using the source voltage modulated by positive and negative polarities or ac, i.e. the image is driven by using the polarity inversion method, so as to avoid the dc blocking effect of the alignment film (alignment film) and the dc residual voltage (DCresidual) caused by the migrating ions in the liquid crystal layer.
Step S24: a common voltage is obtained which minimizes the flicker on the screen. First, the common voltage on the common electrode in the liquid crystal module 30 is adjusted, and since the source has a voltage with an ac waveform, when the common voltage is adjusted, the color of the same pixel may be unbalanced during different frames, so that the display screen flickers.
Referring to fig. 4a, in the pixel, due to the parasitic capacitance effect of the TFT during the charging and discharging processes, the charge is redistributed to generate the voltage drop effect, which causes the asymmetry of the positive and negative voltages in the source voltage, i.e. the balanced voltage may not be the original voltage V0, such as 0V, but has a voltage difference with the original voltage, such as Δ Vp. By adjusting the common voltage and checking the flicker degree of the display screen, the first voltage value V1 that minimizes the flicker degree of the display screen is found, and the first voltage value V1 is used as the common voltage to primarily improve the problem of asymmetrical positive and negative polarity voltages in the source voltage. However, there may be an error in determining the degree of flicker of the display screen, and the degree may be different due to the change in the concentration of mobile ions in the liquid crystal layer.
Step S26: burn-in is uniformly applied to burn the movable ions on both sides of the liquid crystal panel. There is a so-called pre-burn stage between the production of the liquid crystal module 30 and the shipment of the package, which can be utilized to add a uniform pre-burn process. In this step, the common voltage and the positive and negative polarity voltages of the source voltage are deviated to display a single-step picture for a long time by the existence of a large bias amount, so that the movable ions originally existing in the liquid crystal layer are uniformly moved to the two sides of the upper and lower substrates and the interface between the alignment layer and the liquid crystal under the action of the electric field, and the more the existence time of the bias amount is, the more the movable ions are permanently retained at the interface, and the liquid crystal layer can not be slowly dissociated again even if the external electric field is unloaded.
As shown in fig. 4a, after the first voltage value V1 for minimizing the flicker is determined in step S24, the common voltage is further adjusted to deviate from the first voltage value V1 by a first offset Δ Vcom1 to a second voltage value V2, wherein the absolute value of the first offset | Δ Vcom1| is preferably greater than 0.1V. In step S26, the common voltage and the source voltage having the second voltage value V2 are continuously applied to the liquid crystal module 30 for a predetermined time, such as more than twenty minutes, so that the mobile ions in the liquid crystal layer are deposited on both sides of the substrate by the electric field. Generally, the first offset Δ Vcom1 only needs to make the formed electric field enough to move the movable ions in the liquid crystal layer, but in this step, the absolute value | Δ Vcom1| of the first offset is increased as much as possible, and the burn-in time is prolonged as much as possible within the allowable range, so that the effect of permanent pre-burn-in is better.
It should be noted that, in the present embodiment, the second voltage value V2 is a negative voltage, which is negatively biased with respect to the first voltage value V1, however, the invention is not limited thereto, and the second voltage value V2 may be a positive voltage.
Step S28: the common voltage of the shipping final plate is set. After the step S26 is completed, the common voltage may be adjusted again before shipment, and the common voltage of the shipment final edition may be determined. Referring to fig. 4b, the common voltage is adjusted to a third voltage value V3, the difference between the third voltage value V3 and the first voltage value V1 is a second offset Δ Vcom2, and the common voltage with the third voltage value V3 is used to cooperate with the source voltage for displaying images. In this step, the second offset amount Δ Vcom2 is set to be smaller than the first offset amount Δ Vcom1, the small bias voltage is set to have as little influence as possible on the picture quality, and the electric field formed by the bias voltage is still larger than the internal electric field that can be formed by the movable ions in the liquid crystal layer. The absolute value of the second offset | Δ Vcom2| is preferably 0.05-0.2V, and the small bias voltage can help to keep the movable ions in the liquid crystal layer on the upper and lower substrate ends of the liquid crystal panel during the subsequent driving of the liquid crystal module 30.
It should be noted that the second offset Δ Vcom2 has to have the same offset direction as the first offset Δ Vcom1, so as to prevent the ions deposited on the two sides of the substrate in the step S26 from reflowing to the liquid crystal layer during the uniform pre-baking step. In addition, the polarity of the third voltage value V3 is the same as the second voltage value V2, and both the second voltage value V2 and the third voltage value V3 are smaller than the first voltage value V1.
Step S30: when the liquid crystal panel is in a standby state, an external electric field is provided to avoid the backflow of mobile ions. In order to solve the problem that when the liquid crystal module 30 is not powered while standing, some of the originally accumulated movable ions on both sides of the upper and lower substrates may slowly move back to the liquid crystal layer, and in order to reduce the loss of the uniform pre-baking result in step S26, the liquid crystal module 30 itself or the liquid crystal display device formed by building the whole device may be provided with a standby function, in which the backlight module is not driven and only a slight power consumption signal is given to the display panel.
In this step, when the liquid crystal module 30 is in the standby state, a voltage is applied to the common electrode and the source electrode, and the common voltage and the source voltage are maintained at a bias voltage to limit the movement of the mobile ions in the liquid crystal layer, the absolute value of the bias voltage is preferably greater than 0.3V, and the direction of the bias voltage is the same as the deviation direction of the first deviation Δ Vcom1, so as to prevent the ions deposited on both sides of the substrate in the uniform pre-baking stage from flowing back to the liquid crystal layer in step S26.
Referring to FIG. 4c, in one embodiment, the source voltage of the liquid crystal module 30 is supplied with a constant DC voltage, and the common voltage is also supplied with a constant DC voltage, and in this step, a bias voltage Δ V1 exists between the source voltage and the common voltage, and the direction of the bias voltage Δ V1 is the same as the offset direction of the first offset Δ Vcom 1. In addition, the source voltage and the common voltage may also use an ac voltage, with a bias voltage between them.
Referring to fig. 4d, in another embodiment, the source voltage of the liquid crystal module 30 is a constant dc voltage, the common voltage is an ac voltage with a frequency greater than 1/200Hz, and a bias voltage Δ V2 exists between the source voltage and the average voltage of the common voltage, wherein the bias voltage Δ V2 is in the same direction as the offset direction of the first offset Δ Vcom 1. Alternatively, the source voltage may be an ac voltage, and the common voltage may be a fixed dc voltage.
It should be noted that the present invention is not limited to the above two embodiments, and in step 30, the common voltage and the source voltage can be maintained as a bias voltage. In addition, the gate signal only needs to keep the thin film transistor turned on to a certain degree.
The method for improving the display quality of the liquid crystal panel provided by the invention is characterized in that the liquid crystal panel is processed by adopting a uniform pre-burning mode before the liquid crystal panel is delivered, so that movable ions in the liquid crystal layer are burned on two sides of the substrate, and the problems that the set shared voltage cannot enable the source voltage to reach the positive and negative polarity balance due to the concentration change of the movable ions, and the display quality is poor due to the occurrence of afterimages, flicker and the like in the picture display process are solved. The method for improving the display quality of the liquid crystal panel and the concept of setting the common voltage of the final shipment edition still provide a small amount of bias voltage in the image display process to form a tiny electric field so as to continuously limit the movement of the mobile ions in the liquid crystal layer. In addition, the method for improving the display quality of the liquid crystal panel also provides that an external electric field is provided to avoid the backflow of mobile ions when the liquid crystal panel is in a standby state. The invention can make the display product fully achieve the capability of resisting residual images, and is different from the prior method of pursuing materials, components, designs or loop adjustment and requiring stability in each process.
Referring to fig. 2, fig. 5 and fig. 6a to fig. 6d, a second embodiment of the method for improving the display quality of the liquid crystal panel according to the present invention includes the following steps:
step S22: pixel data is input, and the source electrode is enabled to have voltage with alternating current waveform to display images. First, before the liquid crystal module is assembled as shown in fig. 5, the panel 50 is used to place the upper polarizer 71, the lower polarizer 72 and the backlight box 75, and the signal is inputted to the panel 50 from the source-common electrode pad 64 and the gate pad 62 to perform the related test of the image display. The pixel data in fig. 5 can be inputted to the panel 50 from the source-common electrode pad 64, and the voltage with ac waveform on the source is used to display the image, i.e. the source voltage modulated by positive and negative polarity or ac is used to display the image, i.e. the polarity inversion driving is used.
Step S24: a common voltage is obtained which minimizes the flicker on the screen. First, the common voltage on the common electrode in the panel 50 is adjusted, i.e. the common voltage that minimizes the flicker is obtained. Referring to fig. 6a, in a pixel, the source voltage of ac modulation may not be the original voltage V0, such as 0V, but may have a voltage difference with the original voltage, such as Δ Vp. By adjusting the common voltage and checking the flicker degree of the display screen, the first voltage value V1 that minimizes the flicker degree of the display screen is found, and the first voltage value V1 is used as the common voltage to primarily improve the problem of asymmetrical positive and negative polarity voltages in the source voltage. However, there may be an error in determining the degree of flicker of the display screen, and the degree may be different due to the change in the concentration of mobile ions in the liquid crystal layer.
Step S26: burn-in is uniformly applied to burn the movable ions on both sides of the liquid crystal panel. As shown in fig. 6a, after the first voltage value V1 for minimizing the flicker is determined in step S24, the common voltage is further adjusted to deviate from the first voltage value V1 by a first offset Δ Vcom1 to a second voltage value V2, wherein the absolute value of the first offset | Δ Vcom1| is preferably greater than 0.1V. In step S26, the common voltage and the source voltage having the second voltage value V2 are continuously applied to the panel 50 for a predetermined time, such as more than twenty minutes, so that the mobile ions in the liquid crystal layer are deposited on both sides of the substrate by the electric field. In the present embodiment, the second voltage value V2 is a positive voltage, which is forward biased with respect to the first voltage value V1.
Step S28: the common voltage of the shipping final plate is set. After the step S26 is completed, the common voltage may be adjusted again before shipment, and the common voltage of the shipment final edition may be determined. Referring to fig. 6b, the common voltage is adjusted to a third voltage value V3, the difference between the third voltage value V3 and the first voltage value V1 is a second offset Δ Vcom2, and the common voltage with the third voltage value V3 is used to cooperate with the source voltage for displaying images. In this step, the second offset Δ Vcom2 is set to be smaller than the first offset Δ Vcom 1. The absolute value of the second offset | Δ Vcom2| is preferably 0.05-0.2V, and the small bias voltage can help to keep the movable ions in the liquid crystal layer on the upper and lower substrate ends of the liquid crystal panel during the subsequent driving of the liquid crystal module 30. The second offset Δ Vcom2 is required to have the same offset direction as the first offset Δ Vcom1, so as to prevent the ions deposited on both sides of the substrate during the uniform pre-baking step in step S26 from flowing back to the liquid crystal layer. The polarity of the third voltage V3 is the same as the second voltage V2, and both the second voltage V2 and the third voltage V3 are greater than the first voltage V1.
Step S30: when the liquid crystal panel is in a standby state, an external electric field is provided to avoid the backflow of mobile ions.
In this step, when the liquid crystal panel is in a standby state, a voltage is applied to the common electrode and the source electrode, and the common voltage and the source voltage are maintained at a bias voltage to limit the movement of the mobile ions in the liquid crystal layer, the absolute value of the bias voltage is preferably greater than 0.3V, and the direction of the bias voltage is the same as the deviation direction of the first deviation Δ Vcom1, so as to prevent the ions deposited on both sides of the substrate in the uniform pre-baking stage from flowing back to the liquid crystal layer in step S26.
Referring to FIG. 6c, in one embodiment, a constant DC voltage is applied to the source voltage of the LCD panel, and a constant DC voltage is also applied to the common voltage, wherein a bias voltage Δ V1 exists between the source voltage and the common voltage, and the direction of the bias voltage Δ V1 is the same as the offset direction of the first offset Δ Vcom 1. In addition, the source voltage and the common voltage may also use an ac voltage, with a bias voltage between them.
Referring to fig. 6d, in another embodiment, the source voltage of the lcd panel is a constant dc voltage, the common voltage is an ac voltage with a frequency greater than 1/200Hz, and a bias voltage Δ V2 exists between the source voltage and the average of the common voltage, wherein the bias voltage Δ V2 is in the same direction as the offset direction of the first offset Δ Vcom 1. Alternatively, the source voltage may be an ac voltage, and the common voltage may be a fixed dc voltage.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for improving the display quality of a liquid crystal panel, the liquid crystal panel comprising liquid crystal molecules, a switching element, a pixel electrode and a common electrode, the pixel electrode being electrically connected to a source of the switching element, the common electrode having a common voltage and the source having a source voltage, an electric field formed between the pixel electrode and the common electrode being capable of controlling the liquid crystal molecules to deflect and further display an image, the method comprising the steps of:
inputting pixel data to enable the source electrode to have source electrode voltage with alternating current waveform so as to display an image;
adjusting the shared voltage and checking the flicker degree of a display picture so as to adjust the shared voltage to a first voltage value which minimizes the flicker degree of the picture;
further adjusting the common voltage to deviate the common voltage from the first voltage by a first offset amount to a second voltage, wherein the common voltage having the second voltage and the source voltage are continuously applied to the liquid crystal panel for a predetermined time; and
adjusting the shared voltage to a third voltage value, wherein the difference between the third voltage value and the first voltage value is a second offset, the second offset is different from the first offset in size and has the same offset direction, and the shared voltage with the third voltage value is matched with the source voltage to display an image;
wherein an absolute value of the first offset amount is greater than 0.1V.
2. The method for improving the display quality of the liquid crystal panel as claimed in claim 1, wherein the second offset amount is smaller than the first offset amount.
3. The method according to claim 1, wherein the second voltage value and the third voltage value are both greater than the first voltage value.
4. The method according to claim 1, wherein the second voltage value and the third voltage value are both less than the first voltage value.
5. A method for improving the display quality of a liquid crystal panel, the liquid crystal panel comprising liquid crystal molecules, a switching element, a pixel electrode and a common electrode, the pixel electrode being electrically connected to a source of the switching element, the common electrode having a common voltage and the source having a source voltage, an electric field formed between the pixel electrode and the common electrode being capable of controlling the liquid crystal molecules to deflect and further display an image, the method comprising the steps of:
inputting pixel data to enable the source electrode to have voltage with an alternating current waveform so as to display an image;
adjusting the shared voltage and checking the flicker degree of a display picture so as to adjust the shared voltage to a first voltage value which minimizes the flicker degree of the picture;
further adjusting the common voltage to deviate the common voltage from the first voltage by a first offset amount to a second voltage, wherein the common voltage having the second voltage and the source voltage are continuously applied to the liquid crystal panel for a predetermined time;
adjusting the shared voltage to a third voltage value, wherein the difference between the third voltage value and the first voltage value is a second offset, the second offset is different from the first offset in size and has the same offset direction, and the shared voltage with the third voltage value is matched with the source voltage to display an image; and
applying a voltage to the common electrode and the source electrode when the liquid crystal panel is in a standby state, and maintaining a bias voltage between the common voltage and the source electrode, wherein the bias voltage has the same direction as the deviation direction of the first offset;
wherein an absolute value of the first offset amount is greater than 0.1V.
6. The method for improving the display quality of the liquid crystal panel as claimed in claim 5, wherein the second offset amount is smaller than the first offset amount.
7. The method according to claim 5, wherein the second voltage value and the third voltage value are both greater than the first voltage value.
8. The method according to claim 5, wherein the second voltage value and the third voltage value are both smaller than the first voltage value.
9. The method according to claim 5, wherein in the step of applying voltages to the common electrode and the source electrode, the voltage applied to the common electrode and the voltage applied to the source electrode are both DC voltages.
10. The method according to claim 5, wherein in the step of applying voltages to the common electrode and the source electrode, the voltage applied to the common electrode and the voltage applied to the source electrode are both AC voltages; or,
the voltage applied to the source is a direct current voltage, and the voltage applied to the common electrode is an alternating current voltage; or,
the voltage applied to the source is an ac voltage, and the voltage applied to the common electrode is a dc voltage.
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| CN116129827A (en) * | 2023-03-13 | 2023-05-16 | 福州京东方光电科技有限公司 | Residual image debugging device and method for display panel |
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| JP4127249B2 (en) * | 2003-11-27 | 2008-07-30 | セイコーエプソン株式会社 | Electro-optical device adjustment method, electro-optical device adjustment device, and electronic apparatus |
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