CN1924666A - Semi-reflective liquid crystal display device - Google Patents
Semi-reflective liquid crystal display device Download PDFInfo
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- CN1924666A CN1924666A CN 200510099404 CN200510099404A CN1924666A CN 1924666 A CN1924666 A CN 1924666A CN 200510099404 CN200510099404 CN 200510099404 CN 200510099404 A CN200510099404 A CN 200510099404A CN 1924666 A CN1924666 A CN 1924666A
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- liquid crystal
- wave plates
- crystal display
- reflecting
- reflecting liquid
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Abstract
This invention relates to semi reflection LCD device, which sets one upper and down compensation pads between the liquid crystal box of mixed-mode twisted nematic mode and the one upper bias and down bias pads. Through the compensation pads function, it cares the contrast between the transparent and reflection display without adding other cost.
Description
Technical field
The present invention is relevant with half-reflecting liquid crystal display, is meant a kind of half-reflecting liquid crystal display with high contrast display effect especially.
Background technology
Liquid crystal indicator is on demands such as frivolous, wide viewing angle, high brightness and contrasts, often face conflicting challenge between materials limitations or cost of manufacture and the optical characteristics optimization, with half-reflecting liquid crystal display, for solving phase delay (phaseretardation) problem of light when the liquid crystal internal delivery, and take into account the display effect with the reflecting part of penetrating of display message, be to have on the prior art:
Be illustrated in figure 1 as existing half-reflecting liquid crystal display 1 (Transflective LCDdisplay), it is to make on the bilayer, following liquid crystal cell (LC cell) 11,12 on this liquid crystal indicator 1, following polaroid (polarizer) 13, between 14, and on, following liquid crystal cell 11, be provided with a semi-reflective layer 15 in the middle of 12, in order to the external light source 101 of reflection user end and can penetrate for the light that penetrates of this liquid crystal indicator 1 backlight (backlight) 102, above-mentioned liquid crystal cell 11 is the driving action of show image information, 12 of liquid crystal cells are for having the liquid crystal phase delay identical with liquid crystal cell 11, but its liquid crystal torsional direction is opposite with liquid crystal cell 11, so by total delay amount by the designed reflected light part of liquid crystal cell 11, the liquid crystal cell 12 of arranging in pairs or groups again makes the total delay amount that penetrates light from backlight 102 therefore obtain to cancel out each other, can solve the liquid crystal phase place delay issue that penetrates with the reflecting part simultaneously, penetrating shaft (transmission axis) angle of the polaroid of arranging in pairs or groups and the windup-degree (twist angle) of liquid crystal in addition, just can be made into the optimised optical properties of the display mode of white background (normally white) or black matrix (normally black), yet these the are many thickness of liquid crystal cell 12, it is more thick and heavy to make this half-reflecting liquid crystal display 1 compare independent reflective or penetration liquid crystal display device, and does not possess the due frivolous characteristic of taking into account with optical effect of liquid crystal indicator.
Refer again to another existing structure shown in Figure 2, this half-reflecting liquid crystal display 2 is provided with bed hedgehopping layer 22 in the subregion in the liquid crystal layer 21 of its liquid crystal cell 20, and reflection horizon 23 is set on bed hedgehopping layer 22,23 intermediate altitude places, this reflection horizon at liquid crystal layer 21, external light source 201 for reflection user end, and the zone that is not provided with reflection horizon 23 promptly supplies the light transmission that penetrates of backlight 202, said structure makes light penetrating with the reflecting part in liquid crystal cell 20 have identical light path, so by penetrating the phase delay effect with the reflecting part equivalence, the liquid crystal total delay amount that the liquid crystal cell 20 of arranging in pairs or groups again is designed, can solve the liquid crystal phase place delay issue that penetrates with the reflecting part simultaneously, so that make liquid crystal indicator 2 obtain the preferred optical display effect, yet, for reaching the medium height position that reflection horizon 23 is located at liquid crystal layer 21, must set up this bed hedgehopping layer 22, this bed hedgehopping layer 22 has increased extra material expenditure and processing procedure burden, and the more indirect cost of half-reflecting liquid crystal display 2 that causes increases.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of half-reflecting liquid crystal display, can take into account simultaneously to penetrate and reflect the contrast of display degree, and must not increase the extra processing procedure burden of liquid crystal cell, more can reduce production costs.
Take off purpose for before reaching, a kind of half-reflecting liquid crystal display provided by the present invention, be include from top to bottom the last polaroid that is provided with in regular turn, go up compensating plate, liquid crystal cell, down compensating plate and under polaroid, wherein this liquid crystal cell is for mixing stable twisted nematic (Mixed-mode twistednematic) liquid crystal, effect of phase compensation by this upper and lower compensating plate, arrange in pairs or groups penetrating shaft angle and the liquid crystal windup-degree and the liquid crystal retardation phase place of polaroid can be taken into account simultaneously and penetrate and reflect the contrast of display degree again.
Description of drawings
Below, cooperate graphic two preferred embodiments of enumerating now, in order to structure of the present invention and effect are elaborated, wherein used graphic brief description is as follows:
Fig. 1 is the structural representation of existing half-reflecting liquid crystal display;
Fig. 2 is the synoptic diagram of another existing half-reflecting liquid crystal display;
Fig. 3 is the structural representation of the present invention's first preferred embodiment;
Fig. 4 is the penetrance of half-reflecting liquid crystal display of the present invention under the white background pattern and the graph of a relation of driving voltage;
Fig. 5 is the reflectivity of half-reflecting liquid crystal display of the present invention under the white background pattern and the graph of a relation of driving voltage;
Fig. 6 is the penetrance of half-reflecting liquid crystal display of the present invention under the white background pattern and the graph of a relation that penetrates optical wavelength;
Fig. 7 is the reflectivity of half-reflecting liquid crystal display of the present invention under the white background pattern and the graph of a relation of reflected light wavelength;
Fig. 8 is the structural representation of the present invention's second preferred embodiment.
[primary clustering symbol description]
3 half-reflecting liquid crystal displays
Compensating plate on 32 times polaroids 33 of polaroid on 31
331 λ/2 wave plates, 332 λ/34 times compensating plates of 4 wave plates
341 λ/2 wave plates, 342 λ/4 wave plates, 35 liquid crystal cells
351 upper substrates, 352 infrabasal plates, 353 liquid crystal layers
355 times both alignment layers of both alignment layers, 356 half reflection devices on 354
36 backlights, 4 half-reflecting liquid crystal displays
41,42,51,52,61,62,71,72 curve sections
λ on 81 semi-permeable diaphragms 82/82 times λ of 4 wave plates/4 wave plates
Embodiment
See also half-reflecting liquid crystal display of the present invention first preferred embodiment shown in Figure 3, this half-reflecting liquid crystal display 3 includes the last polaroid 31 that from top to bottom is provided with in regular turn, last compensating plate 33, liquid crystal cell 35, following compensating plate 34, following polaroid 32 and backlight 36; Above-mentioned what is called from top to bottom be provided with order be meant near and arrive and receive the order of image display end away from the user; Below be illustrated in the back with regard to above-mentioned each constituent components now:
This liquid crystal cell 35 is the mixing stable twisted nematic liquid crystal modes for single brilliant crack (single-cell gap) structure, have a upper and lower substrate 351,352 and be located at a liquid crystal layer 353 of 351,352 of upper and lower substrates, and in 353 each upper and lower both alignment layers (alignment layer) 354,355 that are provided with of respectively this substrate 351,352 and this liquid crystal layer, and be provided with half reflection unit 356 in this time both alignment layers 355 and 352 of this infrabasal plates, in present embodiment, this half reflection device 356 is made the metallic reflection plate with perforate for aluminium (Al) material;
Respectively this compensating plate 33,34 stacks wide area λ/4 wave plates of forming mutually by a λ/2 wave plates 331,341 and a λ/4 wave plates 332,342 in the present embodiment, Fig. 3 reference, this λ/4 wave plates the 332, the 342nd respectively are located at respectively between this λ/2 wave plates 331,341 and this liquid crystal cell 35, and the λ in the present embodiment/2 wave plates and λ/4 wave plates are all made with the Polycarbonate material;
On respectively being somebody's turn to do, following polaroid 31,32 penetrating shaft is that clockwise 65 degree are example to spending with 80 in this enforcement between 85 degree with respect to horizontal optical axis angle, and this both alignment layers 354 respectively, the 355th, make the liquid crystal windup-degree between 70 degree are spent to 90, think that in present embodiment 80 degree are example, and the phase delay of this liquid crystal layer 353 is between 250 nanometer to 330 nanometers, is example in present embodiment with 280 nanometers, in addition, this λ/2 wave plates 331 respectively, 341 delay compensation is between 250 nanometer to 330 nanometers, is example in present embodiment with 270 nanometers, this λ/2 wave plates 331 respectively, 341 slow axis is that clockwise 55 degree are example to spending with 65 in this enforcement between 65 degree with respect to horizontal optical axis angle, this λ/4 wave plates 332 respectively, 342 delay compensation is between 110 nanometer to 150 nanometers, is example in present embodiment with 140 nanometers, and this λ/4 wave plates 332 respectively, 342 slow axis is that to spend with 5 in this enforcements between clockwise 0 to 10 degree be example with respect to horizontal optical axis angle;
See also Fig. 4 and shown in Figure 5, be simulation and the checking of half-reflecting liquid crystal display 3 of the present invention through optical simulation software DiMOS, wherein Fig. 4 is the penetrance under the white background pattern and the graph of a relation of voltage, Fig. 5 is the reflectivity under the white background pattern and the graph of a relation of voltage, obviously visible when device 3 does not drive from Fig. 4 and Fig. 5, promptly supply voltage and approach 0, make penetrating of device 3 all present bright attitude with the reflecting part, corresponding to curve section among the figure 41,51 as can be known, the penetrance (T) of this moment is (Fig. 4 reference) between 0.16 and 0.18, reflectivity (R) is (Fig. 5 reference) between 0.4 and 0.5, and after device 3 drives, promptly supply voltage and reach drive condition, make penetrating of device 3 all present dark attitude, corresponding to curve section among the figure 42 with the reflecting part, 52 as can be known, penetrance and the reflectivity of this moment all approach 0, from the above, device 3 of the present invention is big in the bright/dark correlative value that penetrates with the reflecting part, so can obtain splendid contrast display effect.
In addition, Fig. 6 is penetrance and the graph of a relation that penetrates optical wavelength, Fig. 7 is the graph of a relation of reflectivity and reflected light wavelength, among the figure, device 3 Wavelength distribution curve 61,71 and device 3 of (Voff) before driving drives Wavelength distribution curves 62,72 demonstrations of back (Von), light source in general visible wavelength range, device 3 of the present invention can get the splendid contrast that penetrates with the bright/dark contrast of reflecting part.
So, the present invention is by the effect of phase compensation by this upper and lower compensating plate 33,34, the penetrating shaft angle of upper and lower polaroid 31,32 of arranging in pairs or groups and the liquid crystal windup-degree and the liquid crystal retardation phase place of liquid crystal layer 353, can take into account simultaneously and penetrate and reflect the contrast of display degree, and must not increase the extra processing procedure burden of liquid crystal cell.
Other one what carry is that the metallic reflection plate of aforesaid half reflection device 356 also can be silver (Ag) or aluminum alloy material and selects one and make; Respectively this λ/2 wave plates 331,341 or material that respectively this λ/4 wave plates 332,342 also can be Arton or Zeonor are selected one and are made, and its grade has the effect that delay compensation can be provided equally.
See also the present invention shown in Figure 8 second preferred embodiment again, wherein most of structure of this half-reflecting liquid crystal display 4 is identical with above-mentioned half-reflecting liquid crystal display 3, below only just different thin portion structure narration:
The half reflection device of present embodiment changes by metal semi-permeable diaphragm 81 replacements with half reflection effect, reason λ/2 wave plates and λ/4 wave plates stack mutually formation on, following compensating plate then changes by the single λ of going up that has effect of phase compensation equally/4 wave plates 82 and single λ down/4 wave plates, 83 replacements, specifically, the aforementioned λ of going up/4 wave plates 82 are to be suitable for for frequency range to pass through between the light wave of 400 nanometer to 800 nano wavebands with following λ/4 wave plates 83, and in order to make respectively this λ/4 wave plates 82,83 material can be selected from Arton material or Zeonor material, and its grade all can provide identical phase compensation effect.
The above only for the present invention's two preferable possible embodiments, so use the equivalent structure that instructions of the present invention and claim do and the variation of method step such as, ought to be included in the claim of the present invention.
Claims (22)
1, a kind of half-reflecting liquid crystal display is characterized in that, includes:
Polaroid on one;
Polaroid once;
One liquid crystal cell is to be located on this between the polaroid and this time polaroid, and this liquid crystal cell includes half reflection unit, and the liquid crystal display pattern of this liquid crystal cell is for mixing the stable twisted nematic pattern;
Compensating plate on one is to be located on this between the polaroid and this liquid crystal cell;
Once compensating plate is to be located between this time polaroid and this liquid crystal cell.
2, half-reflecting liquid crystal display as claimed in claim 1 is characterized in that, described upward compensating plate is a wide area λ/4 wave plates.
3, half-reflecting liquid crystal display as claimed in claim 1 is characterized in that, the described compensating plate of should going up includes a λ/2 wave plates and a λ/4 wave plates that stack mutually, and this λ/4 wave plates are located between this λ/2 wave plates and this liquid crystal cell.
4, half-reflecting liquid crystal display as claimed in claim 3 is characterized in that, the delay compensation of described this λ/2 wave plates is between 250 nanometer to 330 nanometers, and the delay compensation of this λ/4 wave plates is between 110 nanometer to 150 nanometers.
5, half-reflecting liquid crystal display as claimed in claim 3, it is characterized in that, the described penetrating shaft that should go up polaroid is spent between 85 degree between 65 with respect to the horizontal optical axis, the slow axis of this λ/2 wave plates with respect to the horizontal optical axis between 55 the degree to 65 the degree between, the slow axis of this λ/4 wave plates with respect to the horizontal optical axis between 0 to 10 the degree between.
6, half-reflecting liquid crystal display as claimed in claim 3 is characterized in that, described this λ/2 wave plates are that the material that is selected from Polycarbonate, Arton or Zeonor is made.
7, half-reflecting liquid crystal display as claimed in claim 3 is characterized in that, described this λ/4 wave plates are that the material that is selected from Polycarbonate, Arton or Zeonor is made.
8, half-reflecting liquid crystal display as claimed in claim 1 is characterized in that, described this time compensating plate is a wide area λ/4 wave plates.
9, half-reflecting liquid crystal display as claimed in claim 8 is characterized in that, described this time compensating plate includes a λ/2 wave plates and a λ/4 wave plates that stack mutually, and this λ/4 wave plates are located between this λ/2 wave plates and this liquid crystal cell.
10, half-reflecting liquid crystal display as claimed in claim 9 is characterized in that, the delay compensation of described this λ/2 wave plates is between 250 nanometer to 330 nanometers, and the delay compensation of this λ/4 wave plates is between 110 nanometer to 150 nanometers.
11, half-reflecting liquid crystal display as claimed in claim 9, it is characterized in that, the penetrating shaft of described this time polaroid is spent between 85 degree between 65 with respect to the horizontal optical axis, the slow axis of this λ/2 wave plates with respect to the horizontal optical axis between 55 the degree to 65 the degree between, the slow axis of this λ/4 wave plates with respect to the horizontal optical axis between 0 to 10 the degree between.
12, half-reflecting liquid crystal display as claimed in claim 9 is characterized in that, described this λ/2 wave plates are that the material that is selected from Polycarbonate, Arton or Zeonor is made.
13, half-reflecting liquid crystal display as claimed in claim 9 is characterized in that, described this λ/4 wave plates are that the material that is selected from Polycarbonate, Arton or Zeonor is made.
14, half-reflecting liquid crystal display as claimed in claim 1 is characterized in that, described upward compensating plate is a λ/4 wave plates, and this λ/4 wave plates pass through for the wave band of frequency range between 400 nanometer to 800 nanometers.
15, half-reflecting liquid crystal display as claimed in claim 14 is characterized in that, described this λ/4 wave plates are that the material that is selected from Arton or Zeonor is made.
16, half-reflecting liquid crystal display as claimed in claim 1 is characterized in that, described this time compensating plate is a λ/4 wave plates, and this λ/4 wave plates pass through for the wave band of frequency range between 400 nanometer to 800 nanometers.
17, half-reflecting liquid crystal display as claimed in claim 16 is characterized in that, described this λ/4 wave plates are that the material that is selected from Arton or Zeonor is made.
18, half-reflecting liquid crystal display as claimed in claim 1 is characterized in that, described this liquid crystal cell is to be single brilliant gap structure.
19, half-reflecting liquid crystal display as claimed in claim 1 is characterized in that, the liquid crystal windup-degree of described this liquid crystal cell is between 70 degree are spent to 90, and the phase delay of this liquid crystal cell is between 250 nanometer to 330 nanometers.
20, half-reflecting liquid crystal display as claimed in claim 1 is characterized in that, described this half reflection device is the metallic reflection plate with perforate.
21, half-reflecting liquid crystal display as claimed in claim 20 is characterized in that, described this metallic reflection plate is that aluminium, silver or aluminum alloy material are made.
22, half-reflecting liquid crystal display as claimed in claim 1 is characterized in that, described this half reflection device is constituted by layer of metal film at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510099404 CN1924666A (en) | 2005-08-30 | 2005-08-30 | Semi-reflective liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510099404 CN1924666A (en) | 2005-08-30 | 2005-08-30 | Semi-reflective liquid crystal display device |
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| CN1924666A true CN1924666A (en) | 2007-03-07 |
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| CN 200510099404 Pending CN1924666A (en) | 2005-08-30 | 2005-08-30 | Semi-reflective liquid crystal display device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654682A (en) * | 2012-02-28 | 2012-09-05 | 京东方科技集团股份有限公司 | Transflective mode conversion method and liquid crystal display panel |
| CN103197466A (en) * | 2013-04-01 | 2013-07-10 | 京东方科技集团股份有限公司 | Array substrate, liquid crystal cell and display device |
| CN106842681A (en) * | 2017-03-02 | 2017-06-13 | 昆山龙腾光电有限公司 | Display device and reflection and transmission display methods |
| WO2019144566A1 (en) * | 2018-01-23 | 2019-08-01 | Boe Technology Group Co., Ltd. | Display panel and method of driving image display in display panel |
| CN113267926A (en) * | 2021-05-31 | 2021-08-17 | 北京京东方光电科技有限公司 | Display panel, display device and polaroid |
| CN114545678A (en) * | 2022-03-30 | 2022-05-27 | 广州华星光电半导体显示技术有限公司 | Display device and mobile terminal |
| WO2023005601A1 (en) * | 2021-07-30 | 2023-02-02 | 京东方科技集团股份有限公司 | Display module, and display apparatus and display method thereof |
| US11927851B2 (en) | 2021-01-18 | 2024-03-12 | Beijing Boe Display Technology Co., Ltd. | Display panel and display device |
-
2005
- 2005-08-30 CN CN 200510099404 patent/CN1924666A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654682A (en) * | 2012-02-28 | 2012-09-05 | 京东方科技集团股份有限公司 | Transflective mode conversion method and liquid crystal display panel |
| WO2013127204A1 (en) * | 2012-02-28 | 2013-09-06 | 京东方科技集团股份有限公司 | Liquid crystal display panel and transmission/reflection mode conversion method thereof, and display device |
| CN102654682B (en) * | 2012-02-28 | 2015-02-18 | 京东方科技集团股份有限公司 | Transflective mode conversion method and liquid crystal display panel |
| CN103197466A (en) * | 2013-04-01 | 2013-07-10 | 京东方科技集团股份有限公司 | Array substrate, liquid crystal cell and display device |
| WO2014161235A1 (en) * | 2013-04-01 | 2014-10-09 | 京东方科技集团股份有限公司 | Array substrate, liquid crystal box and display device |
| CN103197466B (en) * | 2013-04-01 | 2015-06-17 | 京东方科技集团股份有限公司 | Array substrate, liquid crystal cell and display device |
| CN106842681A (en) * | 2017-03-02 | 2017-06-13 | 昆山龙腾光电有限公司 | Display device and reflection and transmission display methods |
| WO2019144566A1 (en) * | 2018-01-23 | 2019-08-01 | Boe Technology Group Co., Ltd. | Display panel and method of driving image display in display panel |
| US11378852B2 (en) | 2018-01-23 | 2022-07-05 | Hefei Boe Optoelectronics Technology Co., Ltd. | Display panel and method of driving image display in display panel |
| US11927851B2 (en) | 2021-01-18 | 2024-03-12 | Beijing Boe Display Technology Co., Ltd. | Display panel and display device |
| CN113267926A (en) * | 2021-05-31 | 2021-08-17 | 北京京东方光电科技有限公司 | Display panel, display device and polaroid |
| WO2023005601A1 (en) * | 2021-07-30 | 2023-02-02 | 京东方科技集团股份有限公司 | Display module, and display apparatus and display method thereof |
| CN114545678A (en) * | 2022-03-30 | 2022-05-27 | 广州华星光电半导体显示技术有限公司 | Display device and mobile terminal |
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