CN207216229U - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN207216229U CN207216229U CN201721233716.1U CN201721233716U CN207216229U CN 207216229 U CN207216229 U CN 207216229U CN 201721233716 U CN201721233716 U CN 201721233716U CN 207216229 U CN207216229 U CN 207216229U
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- liquid crystal
- cholesteric liquid
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Abstract
The utility model provides a kind of display panel and display device, belongs to display technology field.Wherein, display panel includes multiple pixel cells, each pixel cell includes at least one layer of cholesteric liquid crystal unit, each layer of cholesteric liquid crystal unit includes multiple cholesteric liquid crystal units, the light color of multiple cholesteric liquid crystal units reflection of same layer is different, and between the adjacent cholesteric liquid crystal unit of same layer between be separated with shading graph.The technical solution of the utility model can realize colored display and reduce the thickness and technology difficulty of display device.
Description
Technical field
Display technology field is the utility model is related to, particularly relates to a kind of display panel and display device.
Background technology
Transmissive type liquid crystal display part (liquid crystal display, LCD) must use backlight, device power consumption
80% all consume on backlight.It is therefore not necessary to backlight, low-power consumption, Reflective liquid crystal displays in light weight are as current
One of liquid crystal display study hotspot, particularly attracted attention wherein shown with bistable reflective formula cholesteric liquid crystal again.
Bistable reflective formula cholesteric liquid crystal devices are developed using the bistable behavior of cholesteric liquid crystal, and it has
There is the advantages of many conventional liquid crystal parts are incomparable：1. null field bistable display is used, without refreshing, and need not
Backlight, the advantages of really having played liquid crystal display micro energy lose；2. shown using reflected light, it is easy to accomplish it is colored, and in sun
There is readability, suitable for outdoor display under light；3. polarizer is not needed, so as to substantially increase display brightness；4. in zero electricity
Off field, each pixel of display can add appropriate voltage pulse to realize not steadily in the long term in different reflection states
Shown with the conversion between stable state and gray scale；5. visual angle is wider than traditional LCD visual angle；6. drive circuit is fairly simple, Ke Yishi
Now multi-level high density multichannel driving.This display device is especially suitable for fields such as e-book, electronics curtain and commercial advertisements.
The countries and regions such as the U.S., Japan, China and Europe have put into substantial amounts of human and material resources and have been engaged in basic research in this respect and answer
Use development.
Cholesteric liquid crystal has two kinds of stable states, planar texture shape under zero electric field (in the case of not applying voltage)
State (planar texture, p state) and conical texture state (focal conic texture, fc state).Under zero electric field, place
There is periodic helical structure in the cholesteric liquid crystal of p states, its helical axis is substantially vertical with cell surface, being capable of back wave
Long λ=nP circularly polarized light, wherein, n is liquid crystal material mean refractive index, and P is liquid crystal material pitch, therefore, cholesteric liquid crystal
The wavelength of reflection can be controlled by pitch.
In order to realize colored display, current liquid crystal display panel comprises at least four substrates, and is filled in four substrates
At least three cholesteric crystal layers between any two；Wherein, three cholesteric crystal layers can reflect respectively feux rouges, green glow and
Blue light, by controlling each cholesteric crystal layer respectively, whether reflected light makes liquid crystal display panel display picture.Due to needing
It is overlapped using multiple substrates and multiple cholesteric crystal layers, causes the thickness of available liquid crystal display panel thicker, and
Technology difficulty is larger.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of display panel and display device, can realize colored aobvious
Show and reduce the thickness and technology difficulty of display device.
In order to solve the above technical problems, embodiment offer technical scheme of the present utility model is as follows：
On the one hand, there is provided a kind of display panel, including multiple pixel cells, each pixel cell include at least one layer of cholesteric
Phase liquid crystal cells, each layer of cholesteric liquid crystal unit include multiple cholesteric liquid crystal units, multiple cholesteric liquid crystals of same layer
The light color of unit reflection is different, and between the adjacent cholesteric liquid crystal unit of same layer between be separated with shading graph.
Further, each pixel cell includes at least two layers of cholesteric liquid crystal unit, different layers cholesteric liquid crystal list
Member includes the cholesteric liquid crystal unit of identical quantity, and a pair of the cholesteric liquid crystal unit 1 of adjacent two layers cholesteric liquid crystal unit
Should, each cholesteric liquid crystal unit is identical with corresponding cholesteric liquid crystal cellar area and reflects the light of same color.
Further, each layer of cholesteric liquid crystal unit includes the first cholesteric liquid crystal unit, the second cholesteric liquid crystal
Unit and the 3rd cholesteric liquid crystal unit, the first cholesteric liquid crystal unit can reflect the light of the first color, the second cholesteric phase liquid
Brilliant unit can reflect the light of the second color, and the 3rd cholesteric liquid crystal unit can reflect the light of the 3rd color, the first color,
Second colors and the 3rd color can be mixed into white light.
Further, the light of first color is green glow, and the light of second color is blue light, the 3rd color
Light is feux rouges；Or
The light of first color is green light, and the light of second color is gold-tinted, and the light of the 3rd color is magenta
Coloured light.
Further, in addition to：
Positioned at the first substrate of the light emission side of each layer of cholesteric liquid crystal unit and positioned at each layer of cholesteric liquid crystal unit
Non- light emission side second substrate.
Further, in addition to：
First electrode between each cholesteric liquid crystal unit and corresponding first substrate and positioned at each cholesteric phase
Second electrode between liquid crystal cells and corresponding second substrate.
Further, in addition to：
First orientation layer between each cholesteric liquid crystal unit and corresponding first electrode；
Second orientation layer between each cholesteric liquid crystal unit and corresponding second electrode.
Further, in addition to：
On direction from close to display panel light emission side to away from display panel light emission side, positioned at undermost cholesteric phase liquid
Light absorbing layer corresponding to brilliant unit on second substrate.
Further, on the direction from close to display panel light emission side to away from display panel light emission side, last layer cholesteric
Second substrate corresponding to phase liquid crystal cells is multiplexed with first substrate corresponding to next layer of cholesteric liquid crystal unit.
The utility model embodiment additionally provides a kind of display device, including display panel as described above.
Embodiment of the present utility model has the advantages that：
In such scheme, the light color of multiple cholesteric liquid crystal units reflection of the same layer of each pixel cell is not
Together, shading graph is separated between and between the adjacent cholesteric liquid crystal unit of same layer, so each pixel cell passes through same layer
Multiple cholesteric liquid crystal units colored display can be achieved, realized without designing multilayer cholesteric liquid crystal unit colored aobvious
Show, the thickness and technology difficulty of display device can be reduced.Meanwhile existing display panel is during display picture,
Ambient light needs to sequentially pass through multiple substrates and multiple cholesteric crystal layers, and in multiple substrates and multiple cholesteric liquid crystals
Reflected between layer, wherein each substrate and each cholesteric crystal layer can absorb a part of light so that whole aobvious
Show that light transmittance and the reflecting rate of panel are relatively low, and the technical scheme of the utility model embodiment can reduce substrate and cholesteric phase liquid
The number of plies of brilliant unit, improve the light transmittance and reflecting rate of display panel.
Brief description of the drawings
Fig. 1 is the structural representation of existing display panel；
Fig. 2 is that existing display panel realizes colored structural representation；
Fig. 3 is the structural representation of the utility model embodiment display panel；
Fig. 4 and Fig. 5 is the schematic diagram that each pixel cell of the utility model embodiment includes two layers of cholesteric liquid crystal unit.
Reference
1 first substrate
2 first electrodes
3 cholesteric liquid crystal units
4 second electrodes
5 second substrates
6 light absorbing layers
7 shading graphs
Embodiment
To make embodiment technical problems to be solved of the present utility model, technical scheme and advantage clearer, below will
It is described in detail in conjunction with the drawings and the specific embodiments.
As shown in figure 1, the pitch by controlling cholesteric liquid crystal unit 3, can control cholesteric liquid crystal unit 3 to reflect not
With the light of color.In order to realize colored display, current liquid crystal display panel comprises at least four substrates, and is filled in four bases
At least three cholesteric crystal layers of plate between any two, as shown in Fig. 2 a display panel includes six layers of cholesteric liquid crystal unit 3,
Wherein, two layers of cholesteric liquid crystal unit 3 can reflect feux rouges, two layers of cholesteric liquid crystal unit 3 can reflect green glow, two layers of cholesteric
Phase liquid crystal cells 3 can reflect blue light, and by controlling each cholesteric liquid crystal unit 3 respectively, whether reflected light makes display panel
Display picture.Due to needing to use multiple substrates and multiple cholesteric crystal layers to be overlapped, cause existing display panel
Thickness is thicker, and technology difficulty is larger.
Embodiment of the present utility model can realize coloured silk in view of the above-mentioned problems, provide a kind of display panel and display device
Color shows and reduces the thickness and technology difficulty of display device.
The utility model embodiment provides a kind of display panel, including multiple pixel cells, as shown in Figure 3-Figure 5, each
Pixel cell includes at least one layer of cholesteric liquid crystal unit 3, and each layer of cholesteric liquid crystal unit 3 includes multiple cholesteric liquid crystal lists
Member 3, the light color of multiple cholesteric liquid crystal units 3 reflection of same layer is different, and the adjacent cholesteric liquid crystal list of same layer
Shading graph 7 is separated between member 3.
In the utility model embodiment, the difference of display panel and common liquid crystal display panel is that display panel uses
Be cholesteric liquid crystal, it is the environment when cholesteric liquid crystal does not have applied voltage that cholesteric liquid crystal, which has an important properties,
After light is incided in cholesteric liquid crystal, it can reflect back the light of the color of some in ambient light, what it was reflected back
The color of light can change with the change of the pitch of cholesteric liquid crystal, if but applying certain voltage to cholesteric liquid crystal
Afterwards, inciding the light in cholesteric liquid crystal can all pass through, and will not produce the light reflected back, such as：When cholesteric phase liquid
, can be by ambient light if the pitch of cholesteric liquid crystal is in 417 to 437 nanometer ranges when crystalline substance is not applied in applied voltage
In reflection to red light go back, can will be green in ambient light if the pitch of cholesteric liquid crystal is in 347 to 367 nanometer ranges
Light reflects back, can be by the blu-ray reflection in ambient light if the pitch of cholesteric liquid crystal is in 300 to 307 nanometer ranges
Go back；When applying voltage to cholesteric liquid crystal, ambient light then all passes through.In the utility model embodiment, work as ambient light
When inciding in each cholesteric liquid crystal unit 3, each cholesteric liquid crystal unit 3 can be anti-by the light of the different colours in ambient light
It is emitted back towards, for example, ambient light can be incident by second substrate 5, when being incident to some cholesteric liquid crystal unit 3, the cholesteric phase
Liquid crystal cells 3 can reflex to the light of a certain color second substrate 5, then be projected from second substrate 5, and then cause display surface
Plate display picture.By controlling the pitch of each cholesteric liquid crystal unit 3, to control each reflection of cholesteric liquid crystal unit 3
The color of light.
As shown in Figure 3-Figure 5, in the utility model embodiment, formed with shading graph between cholesteric liquid crystal unit 3
7, the adjacent cholesteric liquid crystal unit 3 of each two is mutually isolated out by shading graph 7, two adjacent cholesterics can be prevented
Phase liquid crystal cells 3 diffuse into one another, and are also possible to prevent the phenomenon that two adjacent cholesteric liquid crystal units 3 produce mixed light.
In the present embodiment, the light color of multiple cholesteric liquid crystal units 3 reflection of the same layer of each pixel cell is not
Together, shading graph 7 is separated between and between the adjacent cholesteric liquid crystal unit 3 of same layer, so each pixel cell passes through same
Colored display is can be achieved in multiple cholesteric liquid crystal units 3 of layer, and colour is realized without designing multilayer cholesteric liquid crystal unit 3
It has been shown that, the thickness and technology difficulty of display device can be reduced.Meanwhile existing display panel is in the process of display picture
In, ambient light needs to sequentially pass through multiple substrates and multiple cholesteric crystal layers, and in multiple substrates and multiple cholesteric phases
Reflected between liquid crystal layer, wherein each substrate and each cholesteric crystal layer can absorb a part of light so that whole
The light transmittance and reflecting rate of individual display panel are relatively low, and the technical scheme of the utility model embodiment can reduce substrate and cholesteric
The number of plies of phase liquid crystal cells 3, improve the light transmittance and reflecting rate of display panel.
Because individual layer cholesteric phase liquid crystal cells 3 can only reflect a part of light, another part light can be lost, in order to reduce
Light efficiency loses, and as shown in Figure 3-Figure 5, each pixel cell includes at least two layers of cholesteric liquid crystal unit 3, different layers cholesteric phase
Liquid crystal cells 3 include the cholesteric liquid crystal unit 3 of identical quantity, and the cholesteric liquid crystal of adjacent two layers cholesteric liquid crystal unit 3
Unit 3 corresponds, and each cholesteric liquid crystal unit 3 is identical with the corresponding area of cholesteric liquid crystal unit 3 and reflects identical face
The light of color.The utilization rate of light can be so improved, reflects more light, ensures the brightness of display device.
Specifically, as shown in figure 3, each pixel cell can include two layers of cholesteric liquid crystal unit 3, each layer of cholesteric phase
Liquid crystal cells 3 include three cholesteric liquid crystal units 3, three cholesteric liquid crystal units 3 of same layer reflect respectively feux rouges (R),
Green glow (G) and blue light (B), and between the adjacent cholesteric liquid crystal unit 3 of same layer between be separated with shading graph 7.
In specific embodiment, each layer of cholesteric liquid crystal unit 3 includes the first cholesteric liquid crystal unit, the second cholesteric phase
Liquid crystal cells and the 3rd cholesteric liquid crystal unit, the first cholesteric liquid crystal unit can reflect the light of the first color, the second cholesteric
Phase liquid crystal cells can reflect the light of the second color, and the 3rd cholesteric liquid crystal unit can reflect the light of the 3rd color, the first face
Color, the second color and the 3rd color can be mixed into white light.
Further, the light of first color is green glow, and the light of second color is blue light, the 3rd color
Light is feux rouges；Or
The light of first color is green light, and the light of second color is gold-tinted, and the light of the 3rd color is magenta
Coloured light.
Further, display panel also includes：
Positioned at the first substrate 1 of the light emission side of each layer of cholesteric liquid crystal unit 3 and positioned at each layer of cholesteric liquid crystal list
The second substrate 5 of the non-light emission side of member 3.First substrate 1 and second substrate 5 can use glass substrate or quartz base plate.
Further, display panel also includes：
First electrode 2 between each cholesteric liquid crystal unit 3 and corresponding first substrate 1 and positioned at each cholesteric
Second electrode 4 between phase liquid crystal cells 3 and corresponding second substrate 5.
In the utility model embodiment, the electricity of first electrode 2 and second is driven by first electrode 2 and second electrode 4
Cholesteric liquid crystal unit 3 between pole 4, if control first electrode 2 and second electrode 4 apply voltage to cholesteric liquid crystal unit 3
When, then cholesteric liquid crystal unit 3 can will inject ambient light in it and all pass through, now display panel not display picture；When
When one electrode 2 and second electrode 4 stop applying voltage to cholesteric liquid crystal unit 3, cholesteric liquid crystal unit 3 is by ambient light
The light of a certain color reflexes to second substrate 5, thus can by control respectively each first electrode 2 and second electrode 4 come
Control each cholesteric liquid crystal unit 3 whether reflected light, and then control display picture.
Further, display panel also includes：
First orientation layer between each cholesteric liquid crystal unit 3 and corresponding first electrode 2；
Second orientation layer between each cholesteric liquid crystal unit 3 and corresponding second electrode 4, is made by oriented layer
Multiple liquid crystal stable orientations that each cholesteric liquid crystal unit 3 includes.
Because cholesteric liquid crystal unit 3 can only reflect a part of light, some light can pass through cholesteric liquid crystal unit
3, second substrate 5 is reflexed to again after being reflected in order to avoid the light of transmission cholesteric liquid crystal unit 3 by first substrate 1, and display is made
Into influence, on the direction from close to display panel light emission side to away from display panel light emission side, in undermost cholesteric liquid crystal
Light absorbing layer 6 is provided with corresponding to unit 3 on second substrate 5, the light through cholesteric liquid crystal unit 3 can be sponged.
In the utility model embodiment, light absorbing layer 6 can be black or other colors, the material of light absorbing layer 6
Can be the material of the black matrix layer in liquid crystal display panel, that is, allyl resin, or other materials, can be according to reality
Border situation is selected.
In order to reduce the number of substrate, the thickness of display panel is reduced, includes at least two layers of courage in each pixel cell
During steroid phase liquid crystal cells 3, on the direction from close to display panel light emission side to away from display panel light emission side, last layer cholesteric phase
Second substrate 5 corresponding to liquid crystal cells 3 is multiplexed with first substrate 1 corresponding to next layer of cholesteric liquid crystal unit 3.
The utility model embodiment additionally provides a kind of display device, including display panel as described above.The display
Device can be：Any product with display function such as LCD TV, liquid crystal display, DPF, mobile phone, tablet personal computer
Or part, wherein, the display device also includes flexible PCB, printed circuit board (PCB) and backboard.
In the present embodiment, the light color of multiple cholesteric liquid crystal units 3 reflection of the same layer of each pixel cell is not
Together, shading graph 7 is separated between and between the adjacent cholesteric liquid crystal unit 3 of same layer, so each pixel cell passes through same
Colored display is can be achieved in multiple cholesteric liquid crystal units 3 of layer, and colour is realized without designing multilayer cholesteric liquid crystal unit 3
It has been shown that, the thickness and technology difficulty of display device can be reduced.Meanwhile existing display panel is in the process of display picture
In, ambient light needs to sequentially pass through multiple substrates and multiple cholesteric crystal layers, and in multiple substrates and multiple cholesteric phases
Reflected between liquid crystal layer, wherein each substrate and each cholesteric crystal layer can absorb a part of light so that whole
The light transmittance and reflecting rate of individual display panel are relatively low, and the technical scheme of the utility model embodiment can reduce substrate and cholesteric
The number of plies of phase liquid crystal cells 3, improve the light transmittance and reflecting rate of display panel.
Unless otherwise defined, the technical term or scientific terminology that the disclosure uses should be the utility model art
The ordinary meaning that the interior personage with general technical ability is understood." first ", " second " and the similar word used in the disclosure
Language is not offered as any order, quantity or importance, and is used only to distinguish different parts." comprising " or " bag
Containing " etc. similar word mean to occur element before the word either object cover appear in the word presented hereinafter element or
Object and its equivalent, and it is not excluded for other elements or object.The similar word such as " connection " or " connected " is not limited to
Physics or mechanical connection, but electrical connection can be included, it is either directly or indirect." on ", " under ",
"left", "right" etc. is only used for representing relative position relation, and after the absolute position for being described object changes, then the relative position is closed
System may also correspondingly change.
It is appreciated that ought the element of such as layer, film, region or substrate etc be referred to as under another element " on " or " "
When, the element can be located at another element with " direct " " on " or " under ", or there may be intermediary element.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of principle described in the utility model is not departed from, some improvements and modifications can also be made, these improvement
The scope of protection of the utility model is also should be regarded as with retouching.
Claims (10)
1. a kind of display panel, it is characterised in that including multiple pixel cells, each pixel cell includes at least one layer of cholesteric phase
Liquid crystal cells, each layer of cholesteric liquid crystal unit include multiple cholesteric liquid crystal units, multiple cholesteric liquid crystal lists of same layer
The light color of member reflection is different, and between the adjacent cholesteric liquid crystal unit of same layer between be separated with shading graph.
2. display panel according to claim 1, it is characterised in that each pixel cell includes at least two layers of cholesteric phase
Liquid crystal cells, different layers cholesteric liquid crystal unit include the cholesteric liquid crystal unit of identical quantity, and adjacent two layers cholesteric phase liquid
The cholesteric liquid crystal unit of brilliant unit corresponds, each cholesteric liquid crystal unit and corresponding cholesteric liquid crystal cellar area phase
Same and reflection same color light.
3. display panel according to claim 1, it is characterised in that each layer of cholesteric liquid crystal unit includes the first courage
Steroid phase liquid crystal cells, the second cholesteric liquid crystal unit and the 3rd cholesteric liquid crystal unit, the first cholesteric liquid crystal unit can be anti-
The light of the first color is penetrated, the second cholesteric liquid crystal unit can reflect the light of the second color, and the 3rd cholesteric liquid crystal unit can
The light of the 3rd color is reflected, the first color, the second color and the 3rd color can be mixed into white light.
4. display panel according to claim 3, it is characterised in that the light of first color is green glow, described second
The light of color is blue light, and the light of the 3rd color is feux rouges；Or
The light of first color is green light, and the light of second color is gold-tinted, and the light of the 3rd color is pinkish red coloured light.
5. display panel according to claim 2, it is characterised in that also include：
Positioned at the first substrate of the light emission side of each layer of cholesteric liquid crystal unit and positioned at the non-of each layer of cholesteric liquid crystal unit
The second substrate of light emission side.
6. display panel according to claim 5, it is characterised in that also include：
First electrode between each cholesteric liquid crystal unit and corresponding first substrate and positioned at each cholesteric liquid crystal
Second electrode between unit and corresponding second substrate.
7. display panel according to claim 6, it is characterised in that also include：
First orientation layer between each cholesteric liquid crystal unit and corresponding first electrode；
Second orientation layer between each cholesteric liquid crystal unit and corresponding second electrode.
8. display panel according to claim 5, it is characterised in that also include：
On direction from close to display panel light emission side to away from display panel light emission side, positioned at undermost cholesteric liquid crystal list
Light absorbing layer corresponding to member on second substrate.
9. display panel according to claim 5, it is characterised in that
On direction from close to display panel light emission side to away from display panel light emission side, last layer cholesteric liquid crystal unit is corresponding
Second substrate be multiplexed with first substrate corresponding to next layer of cholesteric liquid crystal unit.
10. a kind of display device, it is characterised in that including the display surface as described in any one of claim 1 to 9 claim
Plate.
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| CN201721233716.1U CN207216229U (en) | 2017-09-25 | 2017-09-25 | Display panel and display device |
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| CN201721233716.1U CN207216229U (en) | 2017-09-25 | 2017-09-25 | Display panel and display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600525A (en) * | 2019-09-29 | 2019-12-20 | 京东方科技集团股份有限公司 | Display panel, display device and display method thereof |
| CN110850657A (en) * | 2019-11-25 | 2020-02-28 | 南京华日触控显示科技有限公司 | Cholesteric phase color liquid crystal display screen for improving contrast by using black matrix and method thereof |
| CN116419598A (en) * | 2023-06-09 | 2023-07-11 | 惠科股份有限公司 | OLED structure and OLED display screen |
| WO2024000217A1 (en) * | 2022-06-29 | 2024-01-04 | 京东方科技集团股份有限公司 | Projection device and display system |
-
2017
- 2017-09-25 CN CN201721233716.1U patent/CN207216229U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600525A (en) * | 2019-09-29 | 2019-12-20 | 京东方科技集团股份有限公司 | Display panel, display device and display method thereof |
| CN110600525B (en) * | 2019-09-29 | 2022-06-03 | 京东方科技集团股份有限公司 | Display panel, display device and display method thereof |
| US11716874B2 (en) | 2019-09-29 | 2023-08-01 | Beijing Boe Display Technology Co., Ltd. | Display panel with organic electroluminescent device layer and color switchable structure, display device and display method |
| CN110850657A (en) * | 2019-11-25 | 2020-02-28 | 南京华日触控显示科技有限公司 | Cholesteric phase color liquid crystal display screen for improving contrast by using black matrix and method thereof |
| WO2024000217A1 (en) * | 2022-06-29 | 2024-01-04 | 京东方科技集团股份有限公司 | Projection device and display system |
| CN116419598A (en) * | 2023-06-09 | 2023-07-11 | 惠科股份有限公司 | OLED structure and OLED display screen |
| CN116419598B (en) * | 2023-06-09 | 2023-09-19 | 惠科股份有限公司 | OLED structure and OLED display screen |
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