CN114355643A - Low color cast display with controllable brightness and visual angle - Google Patents
Low color cast display with controllable brightness and visual angle Download PDFInfo
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- CN114355643A CN114355643A CN202210034350.4A CN202210034350A CN114355643A CN 114355643 A CN114355643 A CN 114355643A CN 202210034350 A CN202210034350 A CN 202210034350A CN 114355643 A CN114355643 A CN 114355643A
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- 230000000007 visual effect Effects 0.000 title claims abstract description 14
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 239000004988 Nematic liquid crystal Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 4
- 239000004020 conductor Substances 0.000 abstract description 2
- 239000011521 glass Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 230000004456 color vision Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to the field of display, in particular to a display device which has the characteristics that the brightness visual angle can be controlled along with the driving voltage and the color cast is low. The structure of the invention is as follows from top to bottom: the liquid crystal display comprises an upper substrate, an upper common electrode, an upper alignment layer, a liquid crystal layer, a lower alignment layer, a high-drive pixel electrode, a low-drive pixel electrode, a dielectric layer, a lower common electrode, a lower substrate and a traditional display device. The upper substrate and the lower substrate can be made of transparent glass or flexible substrate materials; the upper common electrode, the high-drive pixel electrode, the low-drive pixel electrode and the lower common electrode are made of transparent conductive materials; the conventional display device can be selected from an LCD or an OLED display device. The display device provided by the invention has two gain effects: firstly, the color cast of the display can be reduced; and secondly, the light emitting direction of the display can be optimized in real time according to the use environment, the power consumption is reduced, and the screen burning phenomenon is avoided.
Description
Technical Field
The invention relates to the field of display, in particular to a display device which has the characteristics that the brightness visual angle can be controlled along with the driving voltage and the color cast is low.
Background
Liquid Crystal Display (LCD) and Organic Light Emitting Diode (OLED) displays are two major mainstream Display technologies at present. The LCD technology is that liquid crystal material is arranged between orthogonal polaroids, the orientation of liquid crystal molecules is controlled by externally applied driving voltage, and the polarization state of light waves of a backlight source can be changed after the light waves enter a liquid crystal layer, so that different pictures are displayed; the OLED display is an autonomous light emitting display technology, and when a suitable driving voltage is applied, a light emitting layer of a core device emits light, thereby realizing real-time control of a display screen.
Since the LCD is a non-self-luminous display device, the viewing angle performance is relatively poor, specifically, the brightness is low and the color shift is large at a large viewing angle. The main reason for this is that when the incident light wave passes through the liquid crystal layer vertically and passes through the liquid crystal layer in the off-axis direction with a large viewing angle, the phase difference generated by the liquid crystal layer is different, which causes the difference between the brightness and the color perception in human vision. The OLED display device has a good brightness viewing angle due to the self-luminous characteristic, but the problem of color shift of a large viewing angle still exists, which is mainly caused by the blue shift of the emergent light wave due to the microcavity effect generated by the OLED light-emitting structure under the large viewing angle.
The problems of high heating and energy consumption of the LCD and the OLED in the using process still exist, the service life of a display device can be seriously influenced to a certain extent, the phenomenon of screen burning can be generated when the high-brightness display of the same picture is carried out for a long time, and the use experience of people is seriously influenced.
Disclosure of Invention
The invention aims to provide a novel display, which can solve the problems in the prior art, and can switch the light-emitting visual angle according to the use environment, so that the energy waste caused by the fact that the light-emitting direction faces to the position without a viewer is avoided. Meanwhile, the novel display is provided, light waves are mixed after passing through an LCD liquid crystal layer or an OLED microcavity structure, and the defects of larger coloring and lower brightness of the current display technology at a large viewing angle can be improved to a greater extent.
The invention is realized by the following technical scheme:
the structure of the invention is as follows from top to bottom: the liquid crystal display device comprises an upper substrate, an upper common electrode, an upper alignment layer, a liquid crystal layer, a lower alignment layer, a high-driving pixel electrode, a low-driving pixel electrode, a dielectric layer, a lower common electrode, a lower substrate and a traditional display device.
The upper substrate 1 and the lower substrate 10 are both transparent substrates.
The upper common electrode 2, the high-driving pixel electrode 6, the low-driving pixel electrode 7 and the lower common electrode 9 are Indium Tin Oxide (ITO) transparent electrodes, and the thickness of the electrodes is 0.05-0.15 mu m; the upper common electrode 2 and the lower common electrode 9 are planar electrodes, and the high-drive pixel electrode 6 and the low-drive pixel electrode 7 are strip-shaped electrodes; during driving, the high driving pixel electrode 6 applies a driving voltage higher than the upper and lower common electrodes 2 and 9, and the low driving pixel electrode 7 applies a driving voltage lower than the upper and lower common electrodes 2 and 9.
The upper orientation layer 3 and the lower orientation layer 5 are flat structures, the thickness of the upper orientation layer 3 and the lower orientation layer 5 is 0.02-0.2 mu m, the dielectric constant of the upper orientation layer is 3-5, the upper orientation layer and the lower orientation layer play a role in orienting liquid crystal molecules, and the rubbing orientation directions of the upper orientation layer 3 and the lower orientation layer 5 are parallel to each other.
The liquid crystal layer 4 is made of nematic liquid crystal material or blue phase liquid crystal material, and the thickness of the liquid crystal layer is 2-200 mu m.
The lower dielectric layer 8 is made of polyimide or silicon dioxide, and the dielectric constant is 1.5-10.
The conventional display device 11 is a Liquid Crystal Display (LCD) or an organic light emitting diode display (OLED), and preferably a conventional display having a luminance distribution centered in a direction perpendicular to the display is used.
Compared with the prior art, the gain effect of the invention is as follows: 1. the light waves displayed as pictures are emitted in a direction perpendicular to the direction of the traditional display, and the light waves do not have phase difference or blue shift effect under ideal conditions, so that the problem of large-viewing-angle color cast of the traditional display can be reduced to a greater extent; in the invention, the light waves without color cast can redistribute the brightness of the luminous visual angle through a subsequent structure, and the display picture without color cast is uniformly distributed to each visual angle. 2. The luminous direction of the display can be optimized in real time according to the use environment, the power consumption of the display can be reduced when the same picture and brightness are displayed on the position of a viewer, the screen burning phenomenon of the display is avoided, and the service life of the display is prolonged.
The following description with reference to the drawings and examples is intended to explain the present invention in detail, not to set the scope of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a low color shift display with controllable brightness and viewing angle according to the present invention.
Fig. 2 is a cross-sectional view of a low color shift display with controllable brightness and viewing angle according to the present invention.
FIG. 3 is a cross-sectional view showing a director distribution of a liquid crystal layer when no driving voltage is applied according to the present invention.
FIG. 4 is a cross-sectional view showing a director distribution of a liquid crystal layer when a driving voltage is applied according to the present invention.
FIG. 5 is a cross-sectional view showing a refractive index distribution of a liquid crystal layer when a driving voltage is applied according to the present invention.
Fig. 6 is a comparison graph of the viewing angle luminance distribution before and after the application of the driving voltage using the LCD as the conventional display device according to the first embodiment of the present invention.
Fig. 7 is a comparison graph of the viewing angle luminance distribution before and after applying a driving voltage using an OLED as a conventional display device in example two of the present invention.
Detailed Description
In order that those skilled in the art will be able to further understand the present invention, a detailed description of the embodiments of the present invention will be given below with reference to the accompanying drawings. It should be noted that the drawings are for illustrative purposes only and are not drawn to scale.
The structure of the invention is schematically shown in figure 1, and the device comprises:
an upper substrate 1, an upper common electrode 2, an upper alignment layer 3, a liquid crystal layer 4, a lower alignment layer 5, high-driving pixel electrodes 6 and low-driving pixel electrodes 7, a dielectric layer 8, a lower common electrode 9, a lower substrate 10, and a conventional display device 11; the upper substrate 1 and the lower substrate 10 may be made of transparent glass material or flexible substrate material; the upper common electrode 2, the high-driving pixel electrode 6, the low-driving pixel electrode 7 and the lower common electrode 9 are all made of transparent conductive material ITO, the upper common electrode 2 and the lower common electrode 9 are planar electrodes, and the high-driving pixel electrode 6 and the low-driving pixel electrode 7 are strip-shaped electrodes which are distributed in a mutually staggered mode; the upper alignment layer 3 is uniformly coated on the surface of the common electrode 2 by adopting a polyimide (pi) material, and the lower alignment layer 5 is uniformly coated on the surfaces of the high-drive pixel electrode 6 and the low-drive pixel electrode 7 by adopting a polyimide (pi) material; the lower dielectric layer 8 is made of silica glass material, the conventional display device 11 can be an LCD or OLED display device, and the polarization direction of the picture light wave displayed by the conventional display device 11 is consistent with the rubbing orientation direction of the upper orientation layer 3 and the lower orientation layer 5.
Fig. 2 is a cross-sectional view of the low color shift display with controllable viewing angle of brightness according to the present invention, the cross-sectional direction is perpendicular to the short side direction of the strip-shaped electrode high-driving pixel electrode 6 and the low-driving pixel electrode 7. The cross-sectional direction of fig. 2 is parallel to the rubbing alignment direction of the upper alignment layer 3 and the lower alignment layer 5, and the polarization direction of the outgoing light wave of the conventional display device 11.
The liquid crystal material adopted by the invention is nematic liquid crystal, the liquid crystal materials selected in the first embodiment and the second embodiment are the same, and the liquid crystal parameters are as follows: n ise＝1.721，no＝1.517，ε∥＝27.3，ε⊥The liquid crystal layer thickness was 10 μm, 6.8.
Fig. 3 is a cross-sectional view showing the distribution of director of the liquid crystal layer when no driving voltage is applied, the long axes of the molecules of the liquid crystal layer 4 are uniformly distributed, the equivalent refractive indexes of the liquid crystal molecules at each position to the incident light are completely the same, and the propagation direction of the incident light wave is not affected.
Fig. 4 is a sectional view showing the director distribution of the liquid crystal layer when the driving voltage is applied according to the present invention, in which the voltage applied to the common electrode 2 is 10V, the voltage applied to the high driving pixel electrode 6 is 18V, and the voltage applied to the low driving pixel electrode 7 is 2V. The liquid crystal molecules are polarized at different angles at respective positions, and the liquid crystal molecules just above the high-drive pixel electrode 6 and the low-drive pixel electrode 7 are deflected at a larger angle.
The equivalent refractive index in the liquid crystal layer 4 can be represented by the formula neff(θ)＝none/(no 2sin2θ+ne 2cos2θ)1/2It is calculated where θ represents the angle of deflection of the liquid crystal molecules in the vertical direction. Fig. 5 is a cross-sectional view of the refractive index distribution of the liquid crystal layer 4 when the driving voltage is applied according to the present invention calculated from the above formula.
The dielectric layer 8 had a thickness of 1 μm and a dielectric constant of 4.5.
Fig. 6 is a comparison graph of the viewing angle luminance distribution before and after the application of a driving voltage using an LCD as a conventional display device according to the first embodiment of the present invention, the LCD being selected as the conventional display device in which the light emission distribution is mainly concentrated at a front viewing angle. Before and after the driving voltage is applied, the display provided by the invention has larger difference of visual angle brightness distribution. When the display is used by only one person, no driving voltage is applied to the upper common electrode 2, the high driving pixel electrode 6, the low driving pixel electrode 7 and the lower common electrode 9, and the light-emitting visual angle of the display is concentrated in a front visual angle; when the display is used by many people or users are in a large viewing angle direction, specific driving voltages are respectively applied to the common electrode 2, the high driving pixel electrode 6 and the low driving pixel electrode 7, and the light emitting viewing angle of the display is diffused to the large viewing angle direction of the user position.
Fig. 7 is a comparison graph of the viewing angle luminance distribution before and after applying a driving voltage using an OLED as a conventional display device according to the second embodiment of the present invention, the OLED being selected as a conventional display device in which the light emission distribution is mainly concentrated at a front viewing angle. Before and after the driving voltage is applied, the display provided by the invention has larger difference of visual angle brightness distribution. When the display is used by only one person, no driving voltage is applied to the upper common electrode 2, the high driving pixel electrode 6, the low driving pixel electrode 7 and the lower common electrode 9, and the light-emitting visual angle of the display is concentrated in a front visual angle; when the display is used by many people or users are in a large viewing angle direction, specific driving voltages are respectively applied to the common electrode 2, the high driving pixel electrode 6 and the low driving pixel electrode 7, and the light emitting viewing angle of the display is diffused to the large viewing angle direction of the user position.
Claims (5)
1. The low colour cast display of controllable type of luminance visual angle, its characterized in that from top to bottom does in proper order: the liquid crystal display comprises an upper substrate (1), an upper common electrode (2), an upper orientation layer (3), a liquid crystal layer (4), a lower orientation layer (5), a high-drive pixel electrode (6), a low-drive pixel electrode (7), a dielectric layer (8), a lower common electrode (9), a lower substrate (10) and a traditional display device (11).
2. The display device of claim 1, wherein the liquid crystal layer is nematic liquid crystal or blue liquid crystal.
3. A luminance-viewing angle-controllable low color shift display as claimed in claim 1, characterized in that the upper alignment layer (3) and the lower alignment layer (5) have the same alignment direction for the liquid crystal molecules.
4. A luminance-viewing angle-controllable low-color-shift display as claimed in claim 1, characterized in that the high-drive pixel electrodes (6) and the low-drive pixel electrodes (7) are stripe electrodes in the same layer, which are staggered.
5. A luminance-viewing angle-controllable low color shift display as claimed in claim 1, wherein: when voltage is applied, the applied voltage on the high-drive pixel electrode (6) is higher than the applied drive voltage on the upper common electrode (2) and the lower common electrode (9), and the applied voltage on the low-drive pixel electrode (7) is lower than the applied drive voltage on the upper common electrode (2) and the lower common electrode (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210034350.4A CN114355643A (en) | 2022-01-13 | 2022-01-13 | Low color cast display with controllable brightness and visual angle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210034350.4A CN114355643A (en) | 2022-01-13 | 2022-01-13 | Low color cast display with controllable brightness and visual angle |
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| CN114355643A true CN114355643A (en) | 2022-04-15 |
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| CN202210034350.4A Pending CN114355643A (en) | 2022-01-13 | 2022-01-13 | Low color cast display with controllable brightness and visual angle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114779530A (en) * | 2022-05-16 | 2022-07-22 | 中国民用航空飞行学院 | Low-halo Mini-LED backlight display |
| CN115268127A (en) * | 2022-08-04 | 2022-11-01 | 中国民用航空飞行学院 | Visual angle luminous direction adjustable cockpit display |
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| CN1573486A (en) * | 2003-06-10 | 2005-02-02 | 三星电子株式会社 | Liquid crystal display with multiple area and panel for the display |
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| CN103164071A (en) * | 2011-12-16 | 2013-06-19 | 东莞万士达液晶显示器有限公司 | Switchable touch control stereo image device |
| CN103293726A (en) * | 2012-06-29 | 2013-09-11 | 上海天马微电子有限公司 | Liquid crystal box, 3D touch control display device and control method thereof |
| CN104020572A (en) * | 2014-05-27 | 2014-09-03 | 四川虹视显示技术有限公司 | Glasses-free 3D touch AMOLED display device and manufacturing method thereof |
| CN107092128A (en) * | 2016-02-17 | 2017-08-25 | 三星显示有限公司 | Display device |
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2022
- 2022-01-13 CN CN202210034350.4A patent/CN114355643A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1573486A (en) * | 2003-06-10 | 2005-02-02 | 三星电子株式会社 | Liquid crystal display with multiple area and panel for the display |
| CN102073161A (en) * | 2010-11-16 | 2011-05-25 | 友达光电股份有限公司 | Switchable stereoscopic display |
| CN201853035U (en) * | 2010-11-25 | 2011-06-01 | 河北工业大学 | Liquid crystal display with visual angle being controlled |
| CN103164071A (en) * | 2011-12-16 | 2013-06-19 | 东莞万士达液晶显示器有限公司 | Switchable touch control stereo image device |
| CN103293726A (en) * | 2012-06-29 | 2013-09-11 | 上海天马微电子有限公司 | Liquid crystal box, 3D touch control display device and control method thereof |
| CN104020572A (en) * | 2014-05-27 | 2014-09-03 | 四川虹视显示技术有限公司 | Glasses-free 3D touch AMOLED display device and manufacturing method thereof |
| CN107092128A (en) * | 2016-02-17 | 2017-08-25 | 三星显示有限公司 | Display device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114779530A (en) * | 2022-05-16 | 2022-07-22 | 中国民用航空飞行学院 | Low-halo Mini-LED backlight display |
| CN114779530B (en) * | 2022-05-16 | 2023-08-15 | 中国民用航空飞行学院 | Low halation type Mini-LED backlight display |
| CN115268127A (en) * | 2022-08-04 | 2022-11-01 | 中国民用航空飞行学院 | Visual angle luminous direction adjustable cockpit display |
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Application publication date: 20220415 |
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