CN216792627U - Display panel and display device - Google Patents

Abstract

The embodiment of the utility model discloses a display panel and a display device, wherein the display panel comprises a display liquid crystal box, a first polaroid and a second polaroid, the first polaroid is positioned on the non-light-emitting side of the display liquid crystal box, and the second polaroid is positioned on the light-emitting side of the display liquid crystal box; the display liquid crystal box comprises a first substrate, a liquid crystal layer and a second substrate, wherein a colored resistance layer is arranged on one side of the second substrate, which is close to the first substrate, the colored resistance layer comprises a red color resistance, a green color resistance, a blue color resistance and a white color resistance, and the colored resistance layer is arranged between the colored resistance layer and the first substrate; the light modulation box comprises a third substrate, a first electrode and a plurality of blue light quantum rods, the first electrode is located on one side, close to the display liquid crystal box, of the third substrate, and the blue light quantum rods are located between the first electrode and the second substrate. The technical scheme provided by the embodiment of the utility model can improve the problem that the display color of the display panel is yellow so as to improve the display effect.

Description

Display panel and display device

Technical Field

The embodiment of the utility model relates to the technical field of display, in particular to a display panel and a display device.

Background

A Liquid Crystal Display (LCD) panel has the advantages of good picture quality, small volume, light weight, low power consumption, low cost, and the like, and is widely applied to the field of flat panel display. In order to meet the privacy protection requirements of people, the liquid crystal display panel is developing towards the direction of having wide and narrow viewing angle switching ability, and when a user needs to share information, a wide viewing angle mode is opened; when the user wants to protect the displayed information, the narrow viewing angle mode is used. In the prior art, a whole surface bias voltage is usually applied to a viewing angle control electrode on the side of a color film substrate, so that liquid crystal molecules are tilted to form large-viewing-angle downward light leakage, and a peep-proof function is realized. However, this results in a decrease in transmittance, which affects the display effect. In order to improve the transmittance of the display panel, the current solution is to form the display panel with an RGBW pixel architecture by adding a white sub-pixel to an RGB pixel, and the transmittance of the white sub-pixel is high, so as to improve the transmittance of the entire display panel.

Because light has a principle of three primary colors, the red sub-pixel and the green sub-pixel form a yellow sub-pixel, and therefore, when white is displayed in the display panel, the phenomenon that the color of the display panel is slightly yellow exists, which is not beneficial to the improvement of the display effect.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a display panel and a display device, which aim to solve the problem that the color of the display panel with an RGBW framework is yellow.

In a first aspect, an embodiment of the present invention provides a display panel, including a display liquid crystal cell, a first polarizer and a second polarizer, where the first polarizer is located on a non-light-emitting side of the display liquid crystal cell, and the second polarizer is located on a light-emitting side of the display liquid crystal cell; the display liquid crystal box comprises a first substrate, a liquid crystal layer and a second substrate, wherein a colored resistance layer is arranged on one side, close to the first substrate, of the second substrate, the colored resistance layer comprises a red color resistance, a green color resistance, a blue color resistance and a white color resistance, and the liquid crystal layer is arranged between the colored resistance layer and the first substrate;

the display liquid crystal display panel further comprises a dimming box, wherein the dimming box is located between the second substrate and the second polarizer and comprises a third substrate, a first electrode and a plurality of blue light quantum rods, the first electrode is located on one side, close to the display liquid crystal box, of the third substrate, and the blue light quantum rods are located between the first electrode and the second substrate.

Optionally, the arrangement direction of the blue light quantum rods is perpendicular to the grating direction of the first polarizer.

Optionally, the light emission intensity of the blue light quantum rod is positively correlated with the voltage on the first electrode.

Optionally, the shape of the blue light quantum rod comprises an ellipsoid.

Optionally, the display panel further includes a second electrode located between the white color resistor and the second substrate.

Optionally, when the display panel is in a wide viewing angle display state, the second electrode is applied with a first voltage, or the second electrode is in a floating state; the first electrode is applied with a second voltage, wherein the first voltage is less than the second voltage.

Optionally, when the display panel is in the narrow viewing angle display state, the second electrode is applied with a third voltage, and the first electrode is applied with a fourth voltage.

Optionally, the first electrode and the second electrode are made of a transparent material.

Optionally, the display panel further includes a backlight module, and the backlight module is located on a side of the first polarizer, which is far away from the non-light-emitting side of the display liquid crystal cell.

In a second aspect, an embodiment of the present invention further provides a display device, where the display device includes the display panel provided in any embodiment of the present invention.

According to the technical scheme provided by the embodiment of the utility model, the problem that the display color is yellow is solved by arranging the dimming box between the display liquid crystal box and the second polarizer. The light modulation box comprises a third substrate, a first electrode and a plurality of blue light quantum rods, wherein the first electrode is located on one side, close to the display liquid crystal box, of the third substrate, and the blue light quantum rods are located between the first electrode and the second substrate. By applying voltage to the first electrode, the blue light quantum rod excites blue light under the influence of an electric field between the first electrode and the second substrate, so that the problem that the display color of the display panel with the RGBW pixel architecture is yellowish is solved.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of another display panel according to an embodiment of the utility model;

fig. 3 is a schematic cross-sectional view of another display panel according to an embodiment of the disclosure;

fig. 4 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the utility model;

fig. 5 is a schematic cross-sectional view of another display panel according to an embodiment of the disclosure;

fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Reference numerals are as follows:

1-display liquid crystal cell; 2-a dimming box;

10-a first substrate; 20-a second substrate; 30-a liquid crystal layer; 40-color resist layer; r-red color resistance; g-green color resistance; b-blue color resistance; w-white color resistance; 41-black matrix; 50-a third substrate; 60-a first electrode; 70-blue light quantum rod; 80-a second electrode; 901-a support layer; 902-a driver chip;

100-a first polarizer; 200-a second polarizer; 300-backlight module.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention, and referring to fig. 1, the display panel according to the embodiment of the present invention includes a display liquid crystal cell 1, a first polarizer 100 and a second polarizer 200, where the first polarizer 100 is located on a non-light-emitting side of the display liquid crystal cell 1, and the second polarizer 200 is located on a light-emitting side of the display liquid crystal cell 1; the display liquid crystal box 1 comprises a first substrate 10, a liquid crystal layer 30 and a second substrate 20, wherein a color resistance layer 40 is arranged on one side of the second substrate 20 close to the first substrate 10, the color resistance layer 40 comprises a red color resistance R, a green color resistance G, a blue color resistance B and a white color resistance W, and the liquid crystal layer 30 is arranged between the color resistance layer 40 and the first substrate 10.

The display panel further comprises a dimming box 2, the dimming box 2 is located between the second substrate 20 and the second polarizer 200, the dimming box 2 comprises a third substrate 50, a first electrode 60 and a plurality of blue light quantum rods 70, the first electrode 60 is located on one side of the third substrate 50 close to the display liquid crystal box 1, the blue light quantum rods 70 are located between the first electrode 60 and the second substrate 20, and the arrangement direction of the blue light quantum rods 70 is perpendicular to the grating direction of the first polarizer 100.

Specifically, different areas of the color resist layer 40 are respectively set as a red color resist R, a green color resist G and a blue color resist B, and a white color resist W is used to replace part of the blue color resist B in the pixel units of the red color resist R, the green color resist G and the blue color resist B, so that all the pixel units include RGW pixel units formed by the red color resist R, the green color resist G and the white color resist W, and simultaneously include RGB pixel units formed by the red color resist R, the green color resist G and the blue color resist B; of course, RGBW pixel units formed by red color resistance R, green color resistance G, blue color resistance B and white color resistance W may also be included.

The first substrate 10 may be an array substrate on which a thin film transistor array, a pixel electrode, and a common electrode are formed for driving liquid crystal molecules in the liquid crystal layer 30 to achieve normal in-plane deflection. The second substrate 20 may be a color filter substrate, the second substrate 20 is further provided with a black matrix 41, and the black matrix 41 is disposed between two adjacent color resistors, so that when backlight passes through the corresponding color resistor on the color resistor layer 40, only the corresponding red band, green band, blue band and white light can penetrate through the color resistor, light of different colors is prevented from being mixed, and color display of the display panel is achieved. Due to the existence of the white color resistance W, the light transmittance of the white light can be increased, and the display brightness of the display panel can be increased. However, the white color resistance W may cause color saturation to be reduced, and the yellow color resistance formed by the red color resistance R and the green color resistance G may cause the display color to be yellow when the display panel displays white light.

In this embodiment, a light modulation box 2 is further disposed between the second substrate 20 and the second polarizer 200, the light modulation box 2 includes a third substrate 50 and a first electrode 60 disposed on one side of the second polarizer 200 close to the second substrate 20, and a quantum rod layer is disposed between the first electrode 60 and the second substrate 20, and the quantum rod layer includes a plurality of blue light quantum rods 70. When the display panel emits light, a voltage is applied to the first electrode 50, an electric field is formed between the first electrode 50 and the second substrate 20, and the blue light quantum rod 70 emits blue light under the excitation of the electric field, so as to compensate yellow light generated by the red color resistor R and the green color resistor G when the display panel displays white light, thereby improving the problem that the display color of the display panel is yellowish.

According to the technical scheme provided by the embodiment of the utility model, the problem that the display color is yellow is solved by arranging the dimming box between the display liquid crystal box and the second polarizer. The light modulation box comprises a third substrate, a first electrode and a plurality of blue light quantum rods, wherein the first electrode is located on one side, close to the display liquid crystal box, of the third substrate, and the blue light quantum rods are located between the first electrode and the second substrate. By applying voltage to the first electrode, the blue light quantum rod excites blue light under the influence of an electric field between the first electrode and the second substrate, so that the problem that the display color of the display panel with the RGBW pixel architecture is yellowish is solved.

Alternatively, the quantum rod is a one-dimensional nano rod-shaped crystal, which is a fluorescent material capable of receiving excitation light, and the shape of the fluorescent material may be an ellipsoid. The quantum rod has a light-emitting property, can excite light with different colors according to the material characteristics and the size of the quantum rod, and the light emitted by the quantum rod is polarized light. In the present embodiment, the quantum rod is a blue light quantum rod 70, and when the blue light quantum rod 70 receives light transmitted by the display liquid crystal cell 1, the blue light quantum rod 70 absorbs the light and emits fluorescence in a blue light wavelength range.

Further, the blue light quantum rod 70 has a long axis and a short axis, and the polarization direction of the emitted blue light is parallel to the long axis direction, that is, the polarization direction of the blue light is the same as the arrangement direction of the blue light quantum rod 70. In this embodiment, the first polarizer 100 is a lower polarizer located on the non-light-emitting side of the display liquid crystal cell 1, and the second polarizer 200 is an upper polarizer located on the light-emitting side of the display liquid crystal cell 1, wherein the grating direction of the first polarizer 100 is arranged along a first direction, the grating direction of the second polarizer 200 is arranged along a second direction, and the first direction is perpendicular to the second direction. For example, the first direction may be a direction parallel to a long side of the display panel, and the second direction may be a direction parallel to a short side of the display panel. Here, the arrangement direction of the blue light quantum rod 70 is set to be perpendicular to the grating direction of the first polarizer 100, that is, the arrangement direction of the blue light quantum rod 70 is parallel to the grating direction of the second polarizer 200. Since the polarization direction of the blue light excited by the blue light quantum rod 70 is the same as the arrangement direction of the blue light quantum rod 70 (the arrangement direction of the long axis of the blue light quantum rod 70), the blue light excited by the blue light quantum rod 70 can penetrate through the second polarizer 200, thereby improving the problem that the display color of the display panel is yellowish.

In this embodiment, the blue quantum rod 70 may be formed of one or more semiconductor materials from groups II-VI, III-V, III-VI, or IV-VI of the periodic Table of the elements.

Alternatively, the light emission intensity of the blue quantum rod 70 is positively correlated with the voltage on the first electrode 60. The quantity of white color resistance W determines the degree of yellow color bias of the display panel, the luminous intensity of the blue light quantum rod 70 can be adjusted by adjusting the voltage applied to the first electrode 60, the larger the voltage on the first electrode 60 is, the larger the luminous intensity of the blue light quantum rod 70 is, and the voltage applied to the first electrode 60 is reasonably set, so that the yellow color bias of the display panel can be better compensated. The blue light excited by the influence of the electric field of the blue light quantum rod 70 is low-energy blue light, so that the display effect can be better improved, and the blue light can be prevented.

Optionally, fig. 2 is a schematic cross-sectional structural view of another display panel provided in an embodiment of the present invention, and referring to fig. 2, on the basis of the above technical solution, the display panel provided in an embodiment of the present invention further includes a second electrode 80, where the second electrode 80 is located between the white resistor W and the second substrate 20. The second electrode 80 is a viewing angle switching electrode, and the display panel can be controlled to be switched between a wide viewing angle display state and a narrow viewing angle display state by applying a voltage to the second electrode 80. In the present embodiment, the first electrode 60 and the second electrode 80 are both made of a transparent material, for example, the transparent material may be Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or the like.

In the present embodiment, the liquid crystal molecules may be positive liquid crystal molecules, and in the initial state, the liquid crystal molecules in the liquid crystal layer 30 are aligned parallel to the first substrate 10, that is, the liquid crystal molecules are in a lying posture.

In the wide viewing angle display state, the second electrode 80 is applied with the first voltage, or the second electrode 80 is in a floating state; the first electrode 60 is applied with a second voltage, wherein the first voltage is less than the second voltage. Here, the first voltage is a low voltage, such as 0V. As shown in fig. 2, at this time, the liquid crystal molecules in the liquid crystal layer 30 are affected by the voltage on the first substrate 10 side to realize normal in-plane rotation, and since no voltage or a low voltage is applied to the second electrode 80, the liquid crystal molecules are not substantially deflected and are still in the lying posture, thereby realizing wide viewing angle display. The second voltage may be a voltage greater than 0V, and may be determined according to a degree of color shift of the display panel. The blue light quantum rod 70 excites blue light under the action of the second voltage, so that the problem that the display panel is yellow is solved.

In the narrow viewing angle display state, the second electrode 80 is applied with a third voltage, and the first electrode 60 is applied with a fourth voltage, wherein the third voltage is greater than the first voltage, for example, the third voltage may be 5V. Referring to fig. 3, the second electrode 80 is only located below the white color barrier W, and when a third voltage is applied to the second electrode 80, a vertical electric field is formed between the second electrode 80 and the first substrate 10, so that the liquid crystal molecules in the white color barrier W region tilt up under the influence of the vertical electric field and assume a standing posture, and the liquid crystal molecules in the white color barrier W region leak light at a large viewing angle, thereby reducing contrast and achieving a narrow viewing angle display effect. At this time, the liquid crystal molecules under the red, green and blue color resists R, G and B normally rotate by the voltage on the first substrate 10 side. Since the narrow viewing angle display is realized by applying the voltage to only the second electrode 80 located under the white color resistance W, compared with the prior art in which the full-area voltage is applied to the electrode on the second substrate 20 side, the technical solution provided by the present embodiment can reduce the power consumption of the display panel.

In the technical scheme provided by this embodiment, the second electrode 80 is disposed under the white color resistor W, and a vertical electric field is formed between the second electrode 80 and the first substrate 10 by applying a high voltage to the second electrode 80, so that liquid crystal molecules under the white color resistor W are deflected, light leakage from a large viewing angle to a left and a right viewing angle of the liquid crystal molecules under the white color resistor W is caused, and the display panel is switched from a wide viewing angle display state to a narrow viewing angle display state, thereby achieving the purpose of peep prevention. By combining the blue light quantum rod, the display panel has the capability of switching between wide and narrow view angle modes, and meanwhile, the problem of yellow display color caused by an RGBW pixel architecture can be solved, and the display effect of the display panel is greatly improved.

Further, in the narrow viewing angle display state, the fourth voltage applied by the first electrode 60 may be 0V, or may be a positive voltage greater than 0V, that is, at this time, the blue quantum rod 70 may or may not emit light.

Optionally, an alignment layer and a support layer (not shown) may be further disposed on the color resist layer 40 near the first substrate 10, wherein the alignment layer is used to form alignment tracks for liquid crystal molecules in the liquid crystal layer 30, and the support layer is used to maintain a certain thickness between the first substrate 10 and the second substrate 20, so as to facilitate the arrangement of the liquid crystal molecules.

Optionally, fig. 4 is a schematic cross-sectional structure view of another display panel provided in an embodiment of the present invention, and referring to fig. 4, on the basis of the above technical solutions, the display panel further includes a support layer 901 disposed on a side of the third substrate 50 away from the display liquid crystal cell 1, a driving chip 902 is disposed at an end of the support layer 901, a via hole is disposed on the support layer 901, and the driving chip 902 is electrically connected to the electrode on the first substrate 10, the second electrode 80 on the second substrate 20, and the first electrode 60 through the via hole, respectively, so as to provide a voltage signal for the common electrode, the first electrode 60, and the second electrode 80.

Optionally, fig. 5 is a schematic cross-sectional structure view of another display panel provided in an embodiment of the utility model, and referring to fig. 5, on the basis of the above technical solution, the display panel further includes a backlight module 300, where the backlight module 300 is located on a side of the first polarizer 100 away from a non-light-emitting side of the display liquid crystal cell 1.

Specifically, in the present embodiment, the first substrate 10, the second substrate 20, and the third substrate 50 are all transparent substrates, such as glass substrates or plastic substrates formed by high molecular polymers. The first substrate 10 is an array substrate on which a thin film transistor array is disposed, and the detailed structure thereof can refer to the description in the prior art, and is not described herein again. The second substrate 20 is a color filter substrate, and the structure thereof can refer to the related description in the above embodiments, and the third substrate 20 is used for providing support for the first electrode 60. The backlight module 300 may be adhered to the first polarizer 100 by a back plate, a sealant, etc., and light emitted from the backlight module 300 may be incident into the display liquid crystal cell 1 upward along a direction perpendicular to the backlight module 300. The backlight module 300 includes a backlight source, which may include self-light emitting devices, such as inorganic LEDs, OLED devices, QLED devices, and Micro LED devices.

Optionally, an embodiment of the present invention further provides a display device, where the display device may be a liquid crystal display device, and the display device includes the display panel provided in any embodiment of the present invention, so that the display device also has the same beneficial effects as the display panel, and details are not repeated herein.

For example, fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention, where the display device may be the mobile phone shown in fig. 6, and may also be any electronic product with a display function, including but not limited to the following categories: the touch screen display device comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the utility model is not particularly limited to this.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the spirit of the present invention.

Claims (10)

1. A display panel comprises a display liquid crystal box, a first polaroid and a second polaroid, wherein the first polaroid is positioned on the non-light-emitting side of the display liquid crystal box, and the second polaroid is positioned on the light-emitting side of the display liquid crystal box; the liquid crystal display panel is characterized in that the liquid crystal display panel comprises a first substrate, a liquid crystal layer and a second substrate, wherein a colored resistance layer is arranged on one side of the second substrate, which is close to the first substrate, and comprises a red color resistance, a green color resistance, a blue color resistance and a white color resistance, and the liquid crystal layer is arranged between the colored resistance layer and the first substrate;

the display liquid crystal display panel further comprises a dimming box, wherein the dimming box is located between the second substrate and the second polarizer and comprises a third substrate, a first electrode and a plurality of blue light quantum rods, the first electrode is located on one side, close to the display liquid crystal box, of the third substrate, and the blue light quantum rods are located between the first electrode and the second substrate.

2. The display panel of claim 1, wherein the blue quantum rods are aligned in a direction perpendicular to the direction of the grating of the first polarizer.

3. The display panel according to claim 1, wherein the emission intensity of the blue quantum rod is positively correlated to the voltage on the first electrode.

4. The display panel of claim 1, wherein the shape of the blue quantum rod comprises an ellipsoid.

5. The display panel according to claim 1, further comprising a second electrode between the white color resist and the second substrate.

6. The display panel according to claim 5, wherein when the display panel is in a wide viewing angle display state, the second electrode is applied with a first voltage, or the second electrode is in a floating state; the first electrode is applied with a second voltage, wherein the first voltage is less than the second voltage.

7. The display panel according to claim 5, wherein the second electrode is applied with a third voltage and the first electrode is applied with a fourth voltage when the display panel is in a narrow viewing angle display state.

8. The display panel according to claim 5, wherein the first electrode and the second electrode are made of a transparent material.

9. The display panel of claim 1, further comprising a backlight module on a side of the first polarizer away from a non-light-emitting side of the display liquid crystal cell.

10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.

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