CN1916713A - Semitransparent and half- reflective liquid crystal display - Google Patents
Semitransparent and half- reflective liquid crystal display Download PDFInfo
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- CN1916713A CN1916713A CN 200510090742 CN200510090742A CN1916713A CN 1916713 A CN1916713 A CN 1916713A CN 200510090742 CN200510090742 CN 200510090742 CN 200510090742 A CN200510090742 A CN 200510090742A CN 1916713 A CN1916713 A CN 1916713A
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Abstract
A liquid crystal display of semitransmission-semireflection type consists of liquid crystal display face plate of semitransmission-semireflection type and back light module set at back surface of said display face plate. It is featured as setting reflection and transmission regions on the first base plate and using the first electrode layer on the first base plate to cover two said regions, setting reflection structure and the second electrode layer on the second base plate, aligning its reflection structure with transmission region of the first base plate and setting liquid crystal layer of cholesterol type between two said base plates.
Description
Technical field
The present invention relates to a kind of LCD, and be particularly related to a kind of semitransparent and half-reflective liquid crystal display.
Background technology
LCD has been widely used in electronic products such as PDA(Personal Digital Assistant) and notebook computer, reduces power consumption and improves the emphasis that image quality is development always.Wherein, cholesterol type (Cholesteric) LCD is owing to have the characteristic of bistable state (bistable), only need be when frame update service voltage, therefore have the advantage of power saving.
In addition, semi-penetration semi-reflective (transflective) LCD is a kind of device in conjunction with penetrating LCD and reflective liquid-crystal display.For this kind LCD, when external environment bright and clear, can use extraneous light, to save electric power as light source.And when the insufficient light of external environment, then use backlight to improve the brightness of picture.Therefore semitransparent and half-reflective liquid crystal display can have superior display quality under any environment.
In addition, because cholesterol type (cholesteric) liquid crystal molecule has the character of bistable state, therefore (Twist Nematic LiquidCrystal Display TN-LCD) compares more power saving to cholesterol type LCD with general twisted nematic liquid crystal display.But at present cholesterol type LCD mostly is to belong to reflective liquid-crystal display, therefore when the insufficient light of external environment, just can't show superior display quality.
And at two pieces of paper Int ' l Display Workshop (2001), p.129, by Yuzo Hisatake etal, (Toshiba) and SID ' 00, p.742, by Rob van Asselt et al has had the semi-penetration, semi-reflective of proposition cholesterol type LCD in (Philips).But in the semi-penetration, semi-reflective cholesterol type LCD that above-mentioned document proposed, it mainly all is to utilize the cholesterol liquid crystal molecule as its reflection horizon, but not with the cholesterol liquid crystal molecule as photoswitch.
This be because, under the framework of traditional semi-penetrated semi-reflected liquid crystal display if directly use cholesterol liquid crystal molecule is as photoswitch, because the light of external light source and backlight is all can not make display present bright attitude and can't present dark attitude under making alive state or the making alive state by after the cholesterol liquid crystal molecule.Therefore such cholesterol type LCD also can't be brought into play the effect of semi-penetration, semi-reflective, thereby cholesterol type LCD all is to operate under reflective-mode at present.
In addition, at three pieces of U.S. Pat 6,377,321, US 6,061,107, US 5,949, disclose full-color cholesterin liquid-crystal display technology in 513, wherein US 6,377,321st, and the liquid crystal layer that utilizes the stack Red Green Blue is to reach full-color purpose.And US 6,061,107th, the UV rayed of utilizing varying strength is on liquid crystal layer, and the pitch of control liquid crystal molecule reaches the effect of Red Green Blue mixed light.In addition, US 5,949,513rd, utilize to add different gyrators (Chiral), with the pitch of control liquid crystal molecule, and then reach the effect of three primary colors mixed light.The technology of comprehensive above-mentioned three pieces of United States Patent (USP)s can find that these three pieces of United States Patent (USP)s all are about reflective LCD, are not semitransparent and half-reflective liquid crystal display.
Therefore how utilizing the photoswitch of cholesterol liquid crystal as semitransparent and half-reflective liquid crystal display, is the problem that present LCD Technology need overcome.
Summary of the invention
Purpose of the present invention just provides a kind of semitransparent and half-reflective liquid crystal display, can't utilize the problem of cholesterol liquid crystal as the photoswitch of semitransparent and half-reflective liquid crystal display to overcome known technology.
For reaching above-mentioned purpose, the present invention proposes a kind of semitransparent and half-reflective liquid crystal display, comprising: half-penetration half-reflection liquid crystal display panel and backlight module.Wherein half-penetration half-reflection liquid crystal display panel has the front surface and the back side.Backlight module is arranged on the back side of half-penetration half-reflection liquid crystal display panel.This half-penetration half-reflection liquid crystal display panel comprises a plurality of pixel cells, and each pixel cell comprises first substrate, second substrate and cholesterol liquid crystal layer.First substrate comprises echo area and penetrating region, and comprises on first substrate and be provided with first electrode layer, and this first electrode layer covers echo area and penetrating region.Comprise on second substrate being provided with reflection configuration and the second electrode lay, wherein reflection configuration aligns with the penetrating region of first substrate, and the second electrode lay covers reflection configuration.The cholesterol liquid crystal layer is between first substrate and second substrate.
The semitransparent and half-reflective liquid crystal display that one of the present invention embodiment is described, wherein the birefringence rate variance of the liquid crystal material of cholesterol liquid crystal layer is for example between 0.15～0.8.
The semitransparent and half-reflective liquid crystal display that one of the present invention embodiment is described wherein also comprises on second substrate being provided with chromatic filter layer, the setting of aliging with the echo area of first substrate of this chromatic filter layer, and this chromatic filter layer can be covered by the second electrode lay.
The semitransparent and half-reflective liquid crystal display that one of the present invention embodiment is described, wherein the material of reflection configuration comprises metal.
The semitransparent and half-reflective liquid crystal display that one of the present invention embodiment is described, wherein reflection configuration comprises insulation course and the metal level that covers on the insulation course.
The semitransparent and half-reflective liquid crystal display that one of the present invention embodiment is described wherein is provided with light absorbing zone in the echo area of first substrate.
The semitransparent and half-reflective liquid crystal display that one of the present invention embodiment is described comprises also on first substrate wherein being provided with active member that it is electrically connected with first electrode layer.
The semitransparent and half-reflective liquid crystal display that one of the present invention embodiment is described, also comprise first both alignment layers and second both alignment layers, first both alignment layers is arranged between first electrode layer and the cholesterol liquid crystal layer, and second both alignment layers is arranged between the second electrode lay and the cholesterol liquid crystal layer.
The present invention's half-penetration half-reflection liquid crystal display panel and display, owing to comprise and be provided with reflection configuration on second substrate in its each pixel cell, the setting of aliging with the penetrating region of first substrate of this reflection configuration.By the setting of this reflection configuration, can be so that this utilizes cholesterol liquid crystal can bring into play the advantage of its semi-penetration, semi-reflective as the semitransparent and half-reflective liquid crystal display of photoswitch.
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1 shows that half-penetration half-reflection liquid crystal display panel vertical view according to preferred embodiment of the present invention.
Figure 2 shows that pixel cell among Fig. 1 is along the diagrammatic cross-section of A-A '.
The pixel cell that Figure 3 shows that Fig. 2 is in the following synoptic diagram of making alive state not.
The pixel cell that Figure 4 shows that Fig. 2 is in the following synoptic diagram of making alive state.
Echo area and penetrating region that Fig. 5 A to Fig. 5 D is depicted as the present invention's pixel cell are provided with synoptic diagram.
Figure 6 shows that the organigram of the present invention's semitransparent and half-reflective liquid crystal display.The main element description of symbols
10,20,50,60,70,80: pixel cell
11: the first substrates
112: the echo area
114: penetrating region
116: light absorbing zone
116a: transparent film layer
12: the second substrates
13: the first electrode layers
14: the second electrode lay
15: the first both alignment layers
16: the second both alignment layers
17: the cholesterol liquid crystal layer
22: reflection configuration
24: chromatic filter layer
25: front surface
26: the back side
30: backlight
32: right-hand circular polarization light component backlight
34: Left-hand circular polarization light component backlight
40: ambient light
42: the right-hand circular polarization light component of ambient light
44: the Left-hand circular polarization light component of ambient light
90: semitransparent and half-reflective liquid crystal display
91: backlight module
92: light source
Embodiment
Half-penetration half-reflection liquid crystal display panel
Figure 1 shows that half-penetration half-reflection liquid crystal display panel vertical view according to preferred embodiment of the present invention.Please refer to Fig. 1, the present invention's half-penetration half-reflection liquid crystal display panel 10 comprises upper and lower two substrate 10a, 10b and the liquid crystal layer between two substrate 10a, 10b (not drawing among the figure).And half-penetration half-reflection liquid crystal display panel 10 comprises a plurality of pixel cells 20, and these pixel cells 20 are basic display units of half-penetration half-reflection liquid crystal display panel 10.
Figure 2 shows that pixel cell among Fig. 1 is along the diagrammatic cross-section of A-A '.Please refer to Fig. 2, each pixel cell 20 of half-penetration half-reflection liquid crystal display panel 10 comprises first substrate 11, second substrate 12, first electrode layer 13, the second electrode lay 14 and cholesterol liquid crystal layer 17.Wherein first substrate 11 and second substrate 12 for example are glass substrates.And first substrate 11 comprises echo area 112 and penetrating region 114.And first electrode layer 13 covers echo area 112 and penetrating region 114, and wherein the material of first electrode layer 13 for example is indium tin oxide (ITO) or indium-zinc oxide (IZO).In a preferred embodiment, for example also be provided with light absorbing zone 116 in the echo area 112.And in penetrating region 114, for example be provided with transparent film layer 116a.
In addition, comprise on second substrate 12 and be provided with reflection configuration 22 and the second electrode lay 14.Reflection configuration 22 setting of can aliging with the penetrating region 114 of first substrate 11.In a preferred embodiment, this reflection configuration 22 for example is to adopt metal material, and its formation method for example is to utilize depositing operation and photoengraving carving technology to form earlier, or utilizes shadow mask (shadow mask) collocation depositing operation and form.In another preferred embodiment, reflection configuration 22 is made of photoresist material and metal level, and its formation method is to form earlier after the photoresist layer, again with photoetching process patterning in addition, then, but the metal level that forms reflection ray again in the photoresist layer of this patterning surface to form reflection configuration 22.Particularly, above-mentioned patterning photoresist layer also can make the patterning photoresist layer have profiles such as prismatic, two prismatic, sphere or aspheric surface by the mode of laser-induced thermal etching mode or photoresist backflow (reflow).
In addition, the second electrode lay 14 covers reflection configuration 22, and the material of the second electrode lay 14 for example is indium tin oxide (ITO) or indium-zinc oxide (IZO).In a preferred embodiment, also comprise on second substrate 12 being provided with chromatic filter layer 24, the setting of aliging with the echo area 112 of first substrate 11 of this chromatic filter layer 24, and the second electrode lay 14 covers reflection configurations 22 and chromatic filter layers 24.This chromatic filter layer 24 for example comprises red filter layer, green filter layer and blue color filter layer.
In a preferred embodiment, each pixel cell 20 for example also comprises first both alignment layers 15 and second both alignment layers 16, and wherein first both alignment layers 15 and second both alignment layers 16 cover first electrode layer 13 and the second electrode lay 14 respectively.
Moreover cholesterol liquid crystal layer 17 is to be arranged between first both alignment layers 15 and second both alignment layers 16, and this cholesterol liquid crystal layer 17 can adopt cholesterol liquid crystal dextrorotation or left-handed.
The pixel cell that Figure 3 shows that Fig. 2 is in the following synoptic diagram of making alive state not.Please refer to Fig. 3, do not applying under the voltage condition, cholesterol liquid crystal layer 17 can not rotate, and can enter cholesterol liquid crystal layer 17 from the light 30 of back light by penetrating region 114 from first substrate 11.For ease of explanation, to be that the situation of the cholesterol liquid crystal of dextrorotation is that example describes below: because cholesterol liquid crystal layer 17 is cholesterol liquid crystals of dextrorotation with regard to cholesterol liquid crystal layer 17, therefore can be from the right-circularly polarized light component 32 of the light of back light by 17 reflection of cholesterol liquid crystal layer, and the transmission that can't make progress, so the user can't see above-mentioned right-circularly polarized light component 32.On the other hand, left circularly polarized light component 34 from the light of back light can shine after penetrating cholesterol liquid crystal layer 17 in reflection configuration 22, after the process reflex of reflection configuration 22, the polarization properties of above-mentioned left circularly polarized light component 34 will change right-hand circular polarization into by Left-hand circular polarization, and formation reflected light 342 is got back to cholesterol liquid crystal layer 17, then, reflect to form reflected light 344 through cholesterol liquid crystal layer 17 again, and this reflected light 344 can pass through chromatic filter layer 24, so the user can see above-mentioned left circularly polarized light component 34.
On the other hand, the light 40 of light of coming from the outside enters cholesterol liquid crystal layer 17 from second substrate 12, the right-hand circular polarization light component 42 of this light 40 can be passed through chromatic filter layer 24 by 17 reflection of cholesterol liquid crystal layer, so the user can see above-mentioned right-hand circular polarization light component 42.In addition, the Left-hand circular polarization light component 44 of light 40 can penetrate cholesterol liquid crystal layer 17 and transmission is forward absorbed by light absorbing zone 116 at last, so the user can't see above-mentioned Left-hand circular polarization light component 44.Comprehensive the above.Because the user can see the right-hand circular polarization light component 42 from the light 40 of the left circularly polarized light component 34 of the light 30 of back light and the light that comes from the outside, so pixel cell 20 is in not presenting bright attitude under the making alive state.
The pixel cell that Figure 4 shows that Fig. 2 is in the following synoptic diagram of making alive state.Please refer to Fig. 4, pixel cell 20 is under the state of impressed voltage, its cholesterol liquid crystal layer 17 can rotate to etc. to (clear homeotropic) state, and the cholesterol liquid crystal layer 17 of this kind state can optionally not reflect polarized light, but allows all light transmissions.Therefore, when from the light 30 of back light after first substrate 11 enters cholesterol liquid crystal layer 17 by penetrating region 114, its right-circularly polarized light component 32 and left circularly polarized light component 34 all penetrate cholesterol liquid crystal layer 17 and shine in reflection configuration 22, and formation reflected light 36 returns cholesterol liquid crystal layer 17.Then, this reflected light 36 can penetrate cholesterol liquid crystal layer 17, absorbed by light absorbing zone 116 at last, so the user can't see the light 30 from back light.On the other hand, come from the outside the light 40 of light after second substrate 12 enters cholesterol liquid crystal layer 17, its right-hand circular polarization light component 42 and Left-hand circular polarization light component 44 can penetrate cholesterol liquid crystal layer 17, absorbed by light absorbing zone 116 at last, so the user can't see the light 40 of the light that comes from the outside.Comprehensive the above, pixel cell 20 is under the state of impressed voltage, the user can't it seems from the light 30 of back light and the light 40 of the light that comes from the outside, so pixel cell 20 presents dark attitude.Therefore, the present invention's half penetrated semi-reflective cholesterol type LCD can present bright attitude and dark attitude, and the present invention utilizes the photoswitch of cholesterol liquid crystal as semitransparent and half-reflective liquid crystal display.
What deserves to be mentioned is, when adding driving voltage, can adopt active drive or driven mode to pixel cell 20.In a preferred embodiment, also be provided with active member (not drawing among the figure) on first substrate 11 of each pixel cell, this active member (not drawing among the figure) for example is a thin film transistor (TFT), this thin film transistor (TFT) is electrically connected with first electrode layer 13, transmitting also with this, controlling and driving voltage carries out active driving to pixel cell 20 with this.
It should be noted that the reflected light colour band frequency spectrum Δ λ=p * Δ n owing to the cholesterol liquid crystal molecule, wherein p is the pitch of cholesterol liquid crystal molecule, and Δ n is the birefringence rate variance (birefringence difference) of cholesterol liquid crystal molecule.Therefore suitably select the cholesterol liquid crystal material of high birefringence rate variance can increase reflected light colour band frequency spectrum.In a preferred embodiment, for example select birefringence rate variance Δ n between 0.15～0.8 cholesterol liquid crystal material, that is to say that the present invention can use the cholesterol liquid crystal material (Δ n=0.15～0.5) of arrowband (narrow band), can also use the cholesterol liquid crystal material (Δ n=0.5～0.8) in broadband (wideband).What deserves to be mentioned is that its reflected light colour band frequency spectrum of cholesterol liquid crystal material with Δ n=0.5～0.8 is contained the visible light spectrum of wavelength 450nm to 650nm, so its reflected light is a white light.So, on second substrate 12 chromatic filter layer 24 is not set, the display panels that is made of above-mentioned pixel cell 20 is the black and white display panel.On the other hand, on second substrate 12 chromatic filter layer 24 is set, the display panels that is made of above-mentioned pixel cell 20 is to form full-color display panel.
What deserves to be mentioned is that each pixel cell of the present invention includes echo area and penetrating region, this echo area position that is provided with of penetrating region therewith is not particularly limited, and below only enumerates with regard to several preferred embodiments.Echo area and penetrating region that Fig. 5 A to Fig. 5 D is depicted as the present invention's pixel cell are provided with synoptic diagram.In a preferred embodiment, please refer to Fig. 5 A, pixel cell 50 is divided into echo area 112 and penetrating region 114 along its long border area.In another preferred embodiment, please refer to Fig. 5 B, pixel cell 60 is divided into echo area 112 and penetrating region 114 along its minor face.In another preferred embodiment, please refer to Fig. 5 C, pixel cell 70 is divided into echo area 112 and penetrating region 114, and echo area 112 is around penetrating region 114 peripheral settings.In another preferred embodiment, please refer to Fig. 5 D, pixel cell 80 is divided into echo area 112 and penetrating region 114, and penetrating region 114 is around echo area 112 peripheral settings.
Semitransparent and half-reflective liquid crystal display
Figure 6 shows that the organigram of the present invention's semitransparent and half-reflective liquid crystal display.Please refer to Fig. 6, the present invention's semitransparent and half-reflective liquid crystal display 90 comprises half-penetration half-reflection liquid crystal display panel 10 and backlight module 91.Wherein half-penetration half-reflection liquid crystal display panel 10 has the front surface 25 and the back side 26, and backlight module 91 is arranged on the back side 26 of half-penetration half-reflection liquid crystal display panel.This backlight module 91 is known any suitable backlight modules, and it for example is direct type backlight module or side light type back light module.In addition, the vertical view of half-penetration half-reflection liquid crystal display panel 10 as shown in Figure 1, and the sectional view of each pixel cell of this half-penetration half-reflection liquid crystal display panel 10 as shown in Figure 2, and the associated description of relevant panel 10 and pixel cell thereof as previously discussed, will repeat no more at this.
What is particularly worth mentioning is that, the present invention's semitransparent and half-reflective liquid crystal display 90 is without any need for polaroid, therefore with twisted nematic liquid crystal display (Twist Nematic Liquid CrystalDisplay, TN-LCD) with super twisted nematic liquid crystal display (Super Twist Nematic LiquidCrystal Display, STN-LCD) compare, this semitransparent and half-reflective liquid crystal display 90 has higher light utilization efficiency.
Cite an actual example, if the cholesterol liquid crystal layer of above-mentioned display panels is the cholesterol liquid crystal that adopts dextrorotation, and its birefringence rate variance Δ n=0.6 for example, and do not have chromatic filter layer when second substrate, and when forming black and white display, its light utilization efficiency is about 50%.In addition, when forming full-color display if having chromatic filter layer on second substrate, its light utilization efficiency is about 16.7%.Therefore, compare with only have an appointment 12% conventional thin film transistor LCD of light utilization efficiency, the present invention's semitransparent and half-reflective liquid crystal display 90 obviously has higher light utilization efficiency.
In sum, the present invention's half-penetration half-reflection liquid crystal display panel and display have following feature and advantage at least:
Therefore the present invention can adopt cholesterol liquid crystal as photoswitch because of having reflection configuration, forms half-penetration half-reflection liquid crystal display panel and display.
The present invention is because of adopting the semi-penetration semi-reflective pattern, and therefore bright and clear with not enough environment all has good display effect in the external world.
The present invention is because of adopting cholesterol liquid crystal as photoswitch, and it has bistable characteristic, only need be when frame update service voltage, therefore have the advantage of power saving.
The present invention need not use polaroid because of adopting cholesterol liquid crystal as photoswitch, therefore has preferable light utilization efficiency.
One of the present invention preferred embodiment is because of adopting the cholesterol liquid crystal of high birefringence rate variance, and has chromatic filter layer, therefore has full-color display effect.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the invention; when can doing a little change and improvement, so the present invention's protection domain is as the criterion when looking the claim person of defining.
Claims (8)
1. semitransparent and half-reflective liquid crystal display is characterized in that comprising:
Half-penetration half-reflection liquid crystal display panel, it has the front surface and the back side, and this half-penetration half-reflection liquid crystal display panel comprises a plurality of pixel cells, and each pixel cell comprises:
First substrate, this first substrate comprises echo area and penetrating region, and comprises on this first substrate and be provided with first electrode layer, covers this echo area and this penetrating region;
Second substrate comprises on this second substrate being provided with reflection configuration and the second electrode lay that wherein this reflection configuration aligns with this penetrating region of this first substrate, and this second electrode lay covers this reflection configuration; And
The cholesterol liquid crystal layer is between this first substrate and this second substrate; And
Backlight module is arranged on the back side of this half-penetration half-reflection liquid crystal display panel.
2. the semitransparent and half-reflective liquid crystal display according to claim 1, the birefringence rate variance (birefringence difference, Δ n) that it is characterized in that the liquid crystal material of this cholesterol liquid crystal layer is between 0.15～0.8.
3. the semitransparent and half-reflective liquid crystal display according to claim 1, it is characterized in that also comprising on this second substrate and be provided with chromatic filter layer, this chromatic filter layer aligns with this echo area of this first substrate, and this chromatic filter layer can be covered by this second electrode lay.
4. the semitransparent and half-reflective liquid crystal display according to claim 1 is characterized in that the material of this reflection configuration comprises metal.
5. the half-penetration half-reflection liquid crystal display panel according to claim 1 is characterized in that this reflection configuration comprises insulation course and the metal level that covers on this insulation course.
6. the semitransparent and half-reflective liquid crystal display according to claim 1 is characterized in that being provided with light absorbing zone in this echo area of this first substrate.
7. the semitransparent and half-reflective liquid crystal display according to claim 1 is characterized in that also comprising on this first substrate being provided with active member that it is electrically connected with this first electrode layer.
8. the semitransparent and half-reflective liquid crystal display according to claim 1, it is characterized in that also comprising first both alignment layers and second both alignment layers, this first both alignment layers is arranged between this first electrode layer and this cholesterol liquid crystal layer, and this second both alignment layers is arranged between this second electrode lay and this cholesterol liquid crystal layer.
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| CNB2005100907429A CN100432774C (en) | 2005-08-15 | 2005-08-15 | Semitransparent and half- reflective liquid crystal display |
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| CNB2005100907429A CN100432774C (en) | 2005-08-15 | 2005-08-15 | Semitransparent and half- reflective liquid crystal display |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102193257A (en) * | 2010-03-17 | 2011-09-21 | 胜华科技股份有限公司 | Cholesterol liquid crystal display structure |
| WO2014012307A1 (en) * | 2012-07-20 | 2014-01-23 | 京东方科技集团股份有限公司 | Liquid crystal display device |
| CN108919546A (en) * | 2018-07-09 | 2018-11-30 | 京东方科技集团股份有限公司 | A kind of display panel and its control method, display device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003096111A1 (en) * | 2002-05-07 | 2003-11-20 | University Of Central Florida | Reflective and transflective liquid crystal display using a wire grid polarizer |
| CN1289949C (en) * | 2002-07-23 | 2006-12-13 | 奇景光电股份有限公司 | Bistable state surface-stable cholesterol type liquid crystal display device |
-
2005
- 2005-08-15 CN CNB2005100907429A patent/CN100432774C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102193257A (en) * | 2010-03-17 | 2011-09-21 | 胜华科技股份有限公司 | Cholesterol liquid crystal display structure |
| WO2014012307A1 (en) * | 2012-07-20 | 2014-01-23 | 京东方科技集团股份有限公司 | Liquid crystal display device |
| US9798212B2 (en) | 2012-07-20 | 2017-10-24 | Boe Technology Group Co., Ltd. | Liquid crystal display device using different handedness cholesteric liquid crystals |
| CN108919546A (en) * | 2018-07-09 | 2018-11-30 | 京东方科技集团股份有限公司 | A kind of display panel and its control method, display device |
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