CN105892132B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN105892132B CN105892132B CN201610474017.XA CN201610474017A CN105892132B CN 105892132 B CN105892132 B CN 105892132B CN 201610474017 A CN201610474017 A CN 201610474017A CN 105892132 B CN105892132 B CN 105892132B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133371—Cells with varying thickness of the liquid crystal layer
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Abstract
The invention discloses a display panel and a display device, which are used for reducing chromatic aberration existing in a display panel picture and improving the display effect of the display device. The display panel comprises a liquid crystal box, the liquid crystal box comprises a first area with a first box thickness and a second area with a second box thickness, the first area is closer to the light source of the backlight module than the second area, and the first box thickness is larger than the second box thickness. Because the light guide plate is stronger than green glow and ruddiness to blue light absorption, so can make the ratio that blue light accounts for in the light that the part of keeping away from the light source in backlight unit's the play plain noodles goes out is less than the ratio that blue light accounts for in the light that the part of going close to the light source of backlight unit's play plain noodles, exists in the light that backlight unit sent: the light far away from the light source is yellowed compared with the light near the light source, and the display panel can generate color difference by setting the box thickness of the liquid crystal box to be different, and the direction of the existing color difference is opposite to that of the backlight source, so that the picture color difference of the display device can be reduced or disappeared.
Description
Technical Field
The invention relates to the technical field of displays, in particular to a display panel and a display device.
Background
With the development of display technology, users have increasingly high requirements for the display screen of the display device.
The display device mainly includes: display panel and backlight unit, wherein: the display panel generally includes: the color film substrate and the array substrate are arranged oppositely, and the liquid crystal box is positioned between the color film substrate and the array substrate, and the backlight module mainly comprises: the light guide plate comprises a light guide plate and a light source positioned on the light inlet side of the light guide plate, when the light source passes through the light guide plate, the light guide plate absorbs blue light more strongly than green light and red light, so that the content of the blue light in white light emitted from the part, corresponding to the side, far away from the light source, of the display panel is less than that of the blue light in white light emitted from the part, corresponding to the side, near the light source, of the display panel and the light guide plate, and the part, corresponding to the side, far away from the light source, of the display panel picture is generally yellow relative to the part, corresponding to the side, near the light source, of the display panel.
In the prior art, in order to solve the problem of chromatic aberration of the display panel picture, a method is adopted to make the aperture ratio of the blue sub-pixel on the side close to the light source smaller, but although the chromatic aberration of the display panel picture can be reduced, the mask plate needs to be redesigned, and the preparation process is relatively troublesome.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for reducing chromatic aberration existing in a display panel picture and improving the display effect of the display device.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a display panel, which comprises a liquid crystal box, wherein the liquid crystal box comprises a first area with a first box thickness and a second area with a second box thickness, the first area is closer to a light source of a backlight module than the second area, and the first box thickness is larger than the second box thickness.
According to the display panel provided by the invention, the first box thickness is set to be larger than the second box thickness, so that the color difference exists between the part of the display panel close to the light source and the part of the display panel far away from the light source, and because the light guide plate absorbs blue light more strongly than green light and red light when light emitted by the light source passes through the light guide plate in the backlight module, the proportion of the blue light in the light emitted by the part of the light emitting surface of the backlight module far away from the light source is less than the proportion of the blue light in the light emitted by the part of the light emitting surface of the backlight module close to the light source, so that the light emitted by the backlight module exists: the light far away from the light source is yellowed compared with the light near the light source, and the direction of the existing chromatic aberration is opposite to that of the backlight source by setting the box thickness of the liquid crystal box, namely the light coming out from the part of the display panel near the light source is yellowed relative to the light coming out from the part of the display panel far away from the light source, so that the picture chromatic aberration of the display device can be reduced or eliminated.
Therefore, the display panel provided by the invention can reduce the chromatic aberration of the display panel picture and improve the display effect of the display device.
In some alternative embodiments, the cell thickness of the liquid crystal cell gradually decreases along a direction from a side of the light guide plate of the backlight module close to the light source to a side of the light guide plate far away from the light source.
In some optional embodiments, a plurality of spacers are disposed in the liquid crystal cell, and the height of the spacers gradually decreases along a direction from a side of the light guide plate of the backlight module close to the light source to a side of the light guide plate away from the light source. The adjustment of the thickness of the liquid crystal box is realized by adjusting the height of the spacer.
In some optional embodiments, an insulating layer is disposed in the liquid crystal cell, and the thickness of the insulating layer gradually increases along a direction from a side of the light guide plate of the backlight module, which is close to the light source, to a side of the light guide plate, which is far away from the light source.
In some alternative embodiments, the first can has a thickness that is 0.1 to 0.3 microns greater than the second can.
In some alternative embodiments, the first cell thickness is between 3.4 microns and 3.6 microns and the second cell thickness is between 3.3 microns and 3.4 microns.
In some alternative embodiments, the material of the light guide plate is polymethacrylene.
In some alternative embodiments, the relationship between the transmittance of the liquid crystal cell and the cell thickness of the liquid crystal cell is:
L(λ)＝1/2sin2ψsin2(pi Δ n × d/λ), wherein ψ is a liquid crystal molecule deflection angle; sin for medical use2Psi is a constant; pi is the circumference ratio; a wavelength of λ; d is the cell thickness and Δ n is the birefringence.
The present invention also provides a display device including: a side-in backlight module and the display panel. The display panel can reduce the chromatic aberration of the display panel picture and improve the display effect of the display device, so the display device provided by the invention has better display effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of a first structure of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic view of a second structure of a display panel according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a third structure of a display panel according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a fourth structure of a display panel according to an embodiment of the invention;
FIG. 5 is a diagram illustrating a distribution of test points on a display device according to an embodiment of the present invention;
fig. 6 is a color coordinate distribution diagram of each test point when there is no difference in the box thickness of the display device according to the embodiment of the present invention;
fig. 7 is a color coordinate distribution diagram of each test point when the box thickness of the display device provided by the embodiment of the invention is different.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
As shown in fig. 1 and 2, wherein: fig. 1 is a schematic view of a first structure of a display panel according to an embodiment of the present invention; fig. 2 is a schematic view of a second structure of a display panel according to an embodiment of the invention; the invention provides a display panel, which comprises a liquid crystal box 3, wherein the liquid crystal box 3 comprises a first area 31 with a first box thickness and a second area 32 with a second box thickness, the first area 31 is closer to a light source of a backlight module than the second area 32, and the first box thickness is larger than the second box thickness.
The backlight module generally includes: the display panel generally further includes a first substrate 1 and a second substrate 2 disposed opposite to each other. The liquid crystal cell 3 includes: an oppositely arranged alignment layer 4 and a layer of liquid crystal molecules between the two alignment layers 4.
According to the display panel provided by the invention, the first box thickness is set to be larger than the second box thickness, so that the color difference exists between the part of the display panel close to the light source and the part of the display panel far away from the light source, and because the light guide plate absorbs blue light more strongly than green light and red light when light emitted by the light source passes through the light guide plate in the backlight module, the proportion of the blue light in the light emitted by the part of the light emitting surface of the backlight module far away from the light source is less than the proportion of the blue light in the light emitted by the part of the light emitting surface of the backlight module close to the light source, so that the light emitted by the backlight module exists: the light far away from the light source is yellow compared with the light near the light source, and the direction of the existing color difference is opposite to that of the backlight source by setting the box thickness of the liquid crystal box 3, namely the light coming out from the part of the display panel near the light source is yellow relative to the light coming out from the part of the display panel far away from the light source, so that the picture color difference of the display device can be reduced or eliminated.
Therefore, the display panel provided by the invention can reduce the chromatic aberration of the display panel picture and improve the display effect of the display device.
As shown in fig. 5, 6 and 7, wherein: FIG. 5 is a diagram illustrating a distribution of test points on a display device according to an embodiment of the present invention; fig. 6 is a color coordinate distribution diagram of each test point when there is no difference in the box thickness of the display device according to the embodiment of the present invention; fig. 7 is a color coordinate distribution diagram of each test point when the box thickness of the display device provided by the embodiment of the invention is different. The backlight 7 is located at one side of the display panel, 135 test points are equally divided in the display area 6 of the display panel, the coordinate value (including the coordinate value in the X-axis direction and the coordinate value in the Y-axis direction) of each test point is measured, the abscissa in fig. 5 and fig. 6 represents the second test point, and the ordinate represents the brightness, as can be seen from comparing fig. 5 and fig. 6, compared with a display device with uniform box thickness, the color coordinate change of the 135 test points of the display device provided by the invention is smoother, and the color difference is smaller. As shown in fig. 5, it can be seen that the color difference D1 of the display device before no improvement in the cell thickness was 0.014, the color difference D2 of the display device after optimization of the cell thickness was 0.008, the color difference of the display device was significantly improved by the improvement in the cell thickness, and yellowing of the display device was also significantly improved.
The change of the cell thickness of the liquid crystal cell 3 provided by the invention can be uniform or not, optionally, the cell thickness of the liquid crystal cell 3 is gradually reduced along the direction that one side of the light guide plate of the backlight module, which is close to the light source, points to one side of the light guide plate, which is far away from the light source.
The cell thickness of the liquid crystal cell 3 may be different in various ways, and optionally, as shown in fig. 3, fig. 3 is a third schematic structural diagram of the display panel according to the embodiment of the present invention; the height of the spacers 33 in the liquid crystal cell 3 gradually decreases along the direction from the side of the light guide plate of the backlight module close to the light source to the side of the light guide plate away from the light source. The cell thickness of the liquid crystal cell 3 is adjusted by adjusting the height of the spacer 33. Thus, additional preparation procedures are not needed, and the preparation process is simple and convenient.
Optionally, as shown in fig. 4, fig. 4 is a schematic diagram of a fourth structure of the display panel according to the embodiment of the present invention; the thickness of the insulating layer 5 on the substrate in the display panel can be set to be different, so that the thickness of the liquid crystal box 3 can be adjusted, and the thickness of the insulating layer 5 is gradually increased along the direction that one side of the light guide plate of the backlight module, which is close to the light source, points to one side of the light guide plate, which is far away from the light source.
In an alternative embodiment, the first cell thickness is 0.1 to 0.3 microns greater than the second cell thickness.
Optionally, the cell thickness of the liquid crystal cell 3 is between 3.3 micrometers and 3.6 micrometers. The thickness of the first box is 3.4-3.6 microns, and the thickness of the second box is 3.3-3.4 microns.
The specific material of the light guide plate can be various, and optionally, the material of the light guide plate is polymethacrylene.
The relationship between the transmittance of the liquid crystal cell 3 and the cell thickness of the liquid crystal cell 3 is:
L(λ)＝1/2sin2ψsin2(pi Δ n × d/λ), wherein ψ is a liquid crystal molecule deflection angle; sin for medical use2Psi is a constant; pi is the circumference ratio; a wavelength of λ; d is the cell thickness and Δ n is the birefringence.
The cell thickness of the liquid crystal cell 3 is introduced into the CIE 1931Chromaticity Diagram (CIE 1931Chromaticity Diagram) tristimulus values calculation formula, wherein the tristimulus values are an expression of the amount of stimulus degree of three primary colors causing a certain color perception by the human retina:
s (lambda) is the backlight spectrum, x (lambda) </> is
Is an X/Y/Z tristimulus value curve and an internal standard function curve. d (λ) means differentiation, and the integration interval is 380 to 780. And T (lambda) is spectrum data obtained after the spectrum of the color film substrate, the spectrum of the liquid crystal and the spectrum of the transparent electrode are comprehensively considered, and the brightness and the color coordinate of each test point can be obtained through calculation.
The delta n is 0.1, DWFC-B1550/G5300/R1550 (color film color resistance model for analog optics) is used as the color resistance, d is 3.4-3.6 μm, 0.014 μm is used as the interval, and the difference of the box thickness of the liquid crystal box 3 of the liquid crystal panel with the size of 10.1 is generally less than 0.2 μm under the process condition. At the corresponding box thickness, a difference between Wxn (coordinate value of the nth test point in the X axis direction)/Wyn (coordinate value of the nth test point in the Y axis direction) and Wx1 (coordinate value of the 1 st test point in the X axis direction)/Wy 1 (coordinate value of the 1 st test point in the Y axis direction) at 3.4 μm was dWx/dWy, and the simulation results are shown in table 1.
Table 1: simulation result of influence of box thickness values of different liquid crystal boxes on Wx/Wy
The invention also provides a display device, which comprises the lateral entrance type backlight module and further comprises: the display panel of any of the above. The display panel can reduce the chromatic aberration of the display panel picture and improve the display effect of the display device, so the display device provided by the invention has better display effect.
The display device can be any product or component with a display function, such as a notebook computer display screen, electronic paper, a liquid crystal display, a liquid crystal television, a mobile phone, a tablet computer and the like.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A display panel is characterized by comprising a liquid crystal box, wherein the liquid crystal box comprises a first area with a first box thickness and a second area with a second box thickness, and the first area is closer to a light source of a side-in backlight module than the second area in the direction of the light guide plate from one side of the light guide plate close to the light source of the side-in backlight module to one side of the light guide plate far away from the light source of the side-in backlight module; the first box thickness is between 3.4 and 3.6 microns, and the second box thickness is between 3.3 and 3.4 microns.
2. The display panel according to claim 1, wherein the cell thickness of the liquid crystal cell gradually decreases along a direction from a side of the light guide plate of the backlight module close to the light source to a side of the light guide plate away from the light source.
3. The display panel according to claim 2, wherein a plurality of spacers are disposed in the liquid crystal cell, and the height of the spacers gradually decreases along a direction from a side of the light guide plate of the backlight module close to the light source to a side of the light guide plate away from the light source.
4. The display panel according to claim 2, wherein the liquid crystal cell is provided with an insulating layer, and the thickness of the insulating layer gradually increases along a direction from a side of the light guide plate of the backlight module close to the light source to a side of the light guide plate away from the light source.
5. The display panel of claim 2, wherein the first cell thickness is 0.1-0.3 microns thicker than the second cell thickness.
6. The display panel according to claim 2, wherein the light guide plate is made of polymethacrylene.
7. The display panel according to any one of claims 1 to 6, wherein the relationship between the transmittance of the liquid crystal cell and the cell thickness of the liquid crystal cell is:
L(λ)＝1/2sin2ψsin2(pi Δ n × d/λ), wherein ψ is a liquid crystal molecule deflection angle; sin for medical use2Psi is a constant; pi is the circumference ratio; a wavelength of λ; d is the cell thickness and Δ n is the birefringence.
8. A display device, comprising: a side-in backlight module and a display panel as claimed in any one of claims 1 to 7.
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| CN201610474017.XA CN105892132B (en) | 2016-06-24 | 2016-06-24 | Display panel and display device |
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| CN107065315B (en) * | 2017-03-31 | 2020-05-29 | 京东方科技集团股份有限公司 | Display panel and display device |
| US10824024B2 (en) * | 2018-08-23 | 2020-11-03 | Innolux Corporation | Electronic apparatus |
| CN109581726A (en) * | 2018-12-18 | 2019-04-05 | 惠科股份有限公司 | Display panel and manufacturing method |
Citations (5)
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|---|---|---|---|---|
| JPS57111515A (en) * | 1980-12-27 | 1982-07-12 | Seiko Epson Corp | Liquid crystal thermometer |
| JPS61221727A (en) * | 1985-03-27 | 1986-10-02 | Hitachi Ltd | Liquid crystal optical switch element |
| JP2546898B2 (en) * | 1989-07-28 | 1996-10-23 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | Liquid crystal display |
| US6122032A (en) * | 1996-07-31 | 2000-09-19 | Canon Kabushiki Kaisha | Wedge shaped LCD with change in dispersion density of spacers |
| US6744483B2 (en) * | 2000-04-27 | 2004-06-01 | Victor Company Of Japan, Ltd. | Liquid crystal display and projector having electrode section with equal areas and different heights |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003131220A (en) * | 2001-10-24 | 2003-05-08 | Seiko Epson Corp | Liquid crystal display device and electronic instrument |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57111515A (en) * | 1980-12-27 | 1982-07-12 | Seiko Epson Corp | Liquid crystal thermometer |
| JPS61221727A (en) * | 1985-03-27 | 1986-10-02 | Hitachi Ltd | Liquid crystal optical switch element |
| JPH0610701B2 (en) * | 1985-03-27 | 1994-02-09 | 株式会社日立製作所 | Liquid crystal optical switch element |
| JP2546898B2 (en) * | 1989-07-28 | 1996-10-23 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | Liquid crystal display |
| US6122032A (en) * | 1996-07-31 | 2000-09-19 | Canon Kabushiki Kaisha | Wedge shaped LCD with change in dispersion density of spacers |
| US6744483B2 (en) * | 2000-04-27 | 2004-06-01 | Victor Company Of Japan, Ltd. | Liquid crystal display and projector having electrode section with equal areas and different heights |
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