CN101021630A - Display panel and liquid crystal display device - Google Patents
Display panel and liquid crystal display device Download PDFInfo
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- CN101021630A CN101021630A CN 200610004494 CN200610004494A CN101021630A CN 101021630 A CN101021630 A CN 101021630A CN 200610004494 CN200610004494 CN 200610004494 CN 200610004494 A CN200610004494 A CN 200610004494A CN 101021630 A CN101021630 A CN 101021630A
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Abstract
The invention discloses a display panel and a LCD, having transmission region and reflection/transmission region in pixel cell, where the transmission region can transmit light and the reflection/transmission region includes a circular polarized light selection film to be able to selectively transmit or reflect the light. And the LCD comprises a first circular polarized light generator located on the bottom side of the bottom substrate and a second circular polarized light generator located on the top side of the top substrate, and cooperates with the circular polarized light selection film to be able to achieve the transflective display effect.
Description
Technical field
The present invention relates to a kind of display panel, particularly relate to a kind of semi-penetrating and semi-reflecting type display panel and LCD.
Background technology
Generally speaking, LCD can be divided into penetration, reflective, and three kinds of semi-penetration, semi-reflectives etc. according to the source of illumination light, wherein penetrating LCD has a backlight that is used for producing light usually, and the light that backlight produced can be by liquid crystal cells and each optical element (for example: Polarizer), and then allow the user can watch the picture of LCD to show.In addition, reflective liquid-crystal display then is to have a reflecting surface (as aluminum metal), and when reflective liquid-crystal display display frame, light (for example: surround lighting or front light-source) is entered in the LCD by panel the place ahead, and by liquid crystal cells and each optical element, light is reflected back with rear reflective surface, the light that is reflected can pass liquid crystal cells and each optical element more again, and last user just can watch the picture of LCD to show.On the other hand, semitransparent and half-reflective liquid crystal display then is the LCD that has the pattern of penetrating and reflective-mode simultaneously, that is to say, strong or when needing more weak light when showing when ambient light intensity, LCD just can be closed backlight, and utilize surround lighting to come display frame with reflective-mode as light source, more weak or when needing stronger light when showing when ambient light intensity, LCD just can be opened backlight and be utilized the pattern of penetrating to come display frame, just can reduce the power consumption of backlight thus.
Existing semi-penetrated semi-reflected liquid crystal display, utilize the semi-penetration plate that external environment light is reflected back, so that LCD utilizes reflective-mode to come display frame, or the light that bias light is produced passes this semi-penetration plate, so that the LCD utilization pattern of penetrating is come display frame.The part of employed semi-penetration semi-reflective plate reflection ray also makes another part of light pass through simultaneously.For example shown in Figure 1, it is the basic structure synoptic diagram of an existing semi-penetrated semi-reflected liquid crystal display (hereinafter to be referred as LCD).One semi-penetration, semi-reflective LCD 1 includes transparency electrode 8 on Polarizer on (upper polarizer) 2, one phase shift films (retardation film) 4, one top glass substrate (the upper glass substrate) 6,, a layer of liquid crystal molecule 10, following transparency electrode 11, a lower glass substrate 12, a light diffusing sheet 13, reaches a reflection Polarizer 14.And reflection Polarizer 14 is made up of a multilayer film dielectric layer (multi-layer dielectric film), during as light source, as the usefulness of reflection ray, when the use backlight, light is passed through at environment for use light 9.
In addition, have and utilize different liquid crystal cells gaps and reach the effect that penetrates and reflect.Schematic diagram as shown in Figure 2, it shows an existing semi-penetrating and semi-reflective liquid crystal display panel with different liquid crystal cells gap.At penetrating region, with transparent ITO 17 as electrode, but in the echo area with the metal level 18 of reflection ray as electrode, liquid crystal layer 19 has different layer thicknesses, liquid crystal cells gap in the echo area (is a thickness of liquid crystal layer, 1/4 λ for example) be penetrating region liquid crystal cells gap (for example 1/2 λ) half or littler, be double gap (dual gaps).The Polarizer 15 and the quarter-wave plate 16 of collocation viewing area upper and lower sides, and the effect that can have penetrating and reflect.But, make trouble because be the structure of double gap.
In addition, existing a kind of cholesterol liquid crystal (cholesteric liquid crystal) material, it is the assortment state that a kind of molecular long axis of nematic crystal forms through rotation a little, and necessity distance that the revolution of long axis of liquid crystal molecule direction is 360 ° is called screw pitch or pitch (pitch).This kind spiral structure makes the linear polarization of visible light pass it and cause the plane of polarisation rotation in axial of vertical spin, therefore, this kind liquid crystal has optical activity, according to the structure difference dextrorotation photosensitiveness and left-handed photosensitiveness is arranged, utilize this character, can have the effect that reflects or penetrate light.As shown in Figure 3, it is a dextrorotatory cholesterol liquid crystal 3, pitch is P, if the wavelength of a light is λ, the refractive index of this cholesterol liquid crystal is n, and during λ=P * n/4, then some light can be reflected with the form of right-circularly polarized light, and the light of some then can penetrate this cholesterol liquid crystal with the form of left circularly polarized light.Cholesterol liquid crystal is generally adjusted agent (chiral agent) to row (STN) type LCD with the optical activity of liquid crystal material as twisted-nematic (TN) type and supertwist.
Therefore, for semi-penetrated semi-reflected liquid crystal display, many development spaces are arranged still.
Summary of the invention
The display panel and the LCD that the purpose of this invention is to provide a kind of semi-penetration, semi-reflective, reflection/penetrating region that it utilizes the penetrating region in pixel cell and comprises a circularly polarized light selective membrane is reached the effect of semi-penetration, semi-reflective.
The technical solution used in the present invention is:
Display panel of the present invention comprises an infrabasal plate, a parallel upper substrate that is arranged at the infrabasal plate top, and most pixel cells.These most pixel cells are located between infrabasal plate and the upper substrate, and each pixel cell comprises a penetrating region and a reflection/penetrating region.Penetrate fauna in order to allow light pass through.Reflection/penetrating region comprises a circularly polarized light selective membrane, allows light pass through or reflects with selectivity.
LCD of the present invention comprises an infrabasal plate, a parallel upper substrate that is arranged at the infrabasal plate top, a most pixel cell, are positioned at the first circularly polarized light generation device of infrabasal plate downside, and one is positioned at the upper substrate upside second circularly polarized light generation device.These most pixel cells are located between infrabasal plate and the upper substrate, and each pixel cell comprises that transparency electrode on, a liquid crystal layer, transparency electrode, and each pixel cell once have a penetrating region and a reflection/penetrating region.Penetrate fauna in order to allow light pass through.Reflect/penetrate fauna and comprise a circularly polarized light selective membrane, allow light pass through or reflect with selectivity.
Display panel of the present invention or LCD are utilized the light of circularly polarized light selective membrane to arriving, and according to its polarimetry nature, are selected and determine its reflection or penetrate, and reach the demonstration effect of the semi-penetration, semi-reflective of being desired.Because only need comprise a kind of liquid crystal layer of thickness, therefore can be more easy on making than the structure in gap, double liquid-crystal chamber.
Description of drawings
Concrete feature of the present invention and performance are further described by following embodiment and accompanying drawing thereof.
Fig. 1 is the basic structure synoptic diagram of an existing semi-penetration, semi-reflective LCD.
Fig. 2 is the structure schematic diagram of another existing semi-penetration, semi-reflective LCD.
Fig. 3 is the synoptic diagram of existing cholesterol liquid crystal structure.
Fig. 4 is the synoptic diagram of the basic structure of display panel of the present invention.
Fig. 5 is the synoptic diagram of another specific embodiment of display panel of the present invention.
Fig. 6 is the basic structure synoptic diagram of LCD of the present invention.
Fig. 7 is a specific embodiment synoptic diagram of LCD of the present invention.
Synoptic diagram when Fig. 8 is many LCD of figure environment for use light source.
Fig. 9 is another specific embodiment synoptic diagram of LCD of the present invention.
Synoptic diagram when Figure 10 is Fig. 9 LCD environment for use light source.
Figure 11 is the synoptic diagram of another specific embodiment again of LCD of the present invention.
Figure 12 is a LCD of the present invention specific embodiment synoptic diagram again.
Main element symbol description among the figure:
1,30: 32: the first line Polarizers of LCD
2: go up Polarizer 33,49:1/2 ripple plate
3: 34: the first phase shift films of cholesterol liquid crystal
4,16: 48: the second phase shift films of phase shift films
6,22,46: 50: the second line Polarizers of upper substrate
8,44: go up transparency electrode 56: following alignment film
9: surround lighting 58: go up alignment film
10,19,42: liquid crystal layer 60: flatness layer
11,40: following transparency electrode 71: non-polarization light
12,21,36: infrabasal plate 72: left circularly polarized light
13: light diffusing sheet 73: right-circularly polarized light
14: reflection Polarizer 74,75: linearly polarized light
15: Polarizer P: pitch
17: transparency electrode λ: wavelength
18: metal level 20: display panel
20: display panel 23,38: circularly polarized light selective membrane
24,64: light-absorption layer 25,52: penetrating region
26,54: reflection/penetrating region 31,51: circularly polarized light generation device
Embodiment
See also Fig. 4, the synoptic diagram that it shows display panel 20 of the present invention comprises an infrabasal plate 21, a upper substrate 22 and most pixel cells.Upper substrate 22 is parallel is arranged at infrabasal plate top 21, and these substrates can be glass substrate.A most pixel cell are located between infrabasal plate 21 and the upper substrate 22, and each pixel cell comprises a penetrating region 25 and a reflection/penetrating region 26.Penetrating region 25 can allow light pass through.Reflection/penetrating region 26 comprises a circularly polarized light selective membrane 23, and alternative allows light pass through or reflects.Circularly polarized light selective membrane 23 can comprise for example cholesterol liquid crystal of helical arrangement (helical cholesteric liquid crystal), and the cholesterol liquid crystal of dextrorotation can reflect right-circularly polarized light, and left circularly polarized light is passed through.There is no particular restriction for the area ratio of penetrating region and reflection/penetrating region or shape, can be according to penetrance or the suitable adjustment of reflectivity, to obtain preferable visual state.
See also Fig. 5, reflection/penetrating region 26 can comprise further that a light-absorption layer 24 is to absorb the light that penetrates from the circularly polarized light selective membrane, the reflection of avoiding this light that penetrates to produce other in pixel cell, and generation light leakage effect.This light-absorption layer can be between infrabasal plate 21 and circularly polarized light selective membrane 23 or the downside of infrabasal plate 21.Light-absorption layer 24 can be for example black resin light absorbents such as (black resin).
See also Fig. 6, it shows the synoptic diagram according to LCD 30 of the present invention.LCD 30 of the present invention comprises that the first circularly polarized light generation device, 31, the one parallel upper substrate that is arranged at infrabasal plate 36 tops 46, that an infrabasal plate 36, is positioned at infrabasal plate 36 downsides is positioned at the second circularly polarized light generation device 51 of the upside of upper substrate 46, and most pixel cells.Each pixel cell is located between infrabasal plate 36 and the upper substrate 46.Pixel cell comprises transparency electrode 44 on, a liquid crystal layer 42, transparency electrode 40 once.Each pixel cell has a penetrating region 52 and a reflection/penetrating region 54.Penetrating region 52 can allow light pass through.Reflection/penetrating region 54 comprises a circularly polarized light selective membrane 38, and alternative allows light pass through or reflects.The first circularly polarized light generation device 31 can be made of the first line Polarizer 32 and first phase shift films 34.The second circularly polarized light generation device 51 can be made of the second line Polarizer 50 and second phase shift films 48.There is no particular restriction for the area ratio of penetrating region 52 and reflection/penetrating region 54 and shape, can be according to penetrance or the suitable adjustment of reflectivity, to obtain preferable visual state.Thickness of liquid crystal layer then for make the product of the difference of unusual optical index of the ordinary refraction index of contained liquid crystal in the liquid crystal layer and liquid crystal and thickness be 0 to lambda1-wavelength 1/2 between.
See also Fig. 7, it shows the synoptic diagram according to a specific embodiment of LCD of the present invention, this LCD further comprises on one alignment film 58 and alignment film 56 once, and alignment film can be polyimide (polyimide), lays respectively at the upper and lower surface of liquid crystal layer.Employed upper and lower substrate 46,36 is respectively glass substrate.Employed first phase shift films, 34 second phase shift films 48 are quarter-wave plate (Quarter-wave plate).The employed first line Polarizer 32 and first phase shift films 34 are combined into the Left-hand circular polarization light generating device, and the second line Polarizer 50 and second phase shift films 48 are combined into the right-hand circular polarization light generating device.Employed upper and lower transparency electrode 44,40 is a transparency electrode, can for example be ITO.The circularly polarized light selective membrane 38 that is positioned at reflection/penetrating region 54 is left-handed cholesterol liquid crystal, left circularly polarized light is reflected, and allows right-circularly polarized light pass through.Make the liquid crystal cells gap, that is, and thickness of liquid crystal layer, satisfy following formula I:
Δ n * d=λ/2 formula I
Wherein, d is a thickness of liquid crystal layer, the wavelength of light of λ for using, and Δ n is unusual optical index (extraordinary refractive index, the n of the liquid crystal of liquid crystal layer
e) and its ordinary refraction index (ordinary refractive index, n
o) poor, i.e. Δ n=n
e-n
o
In addition, can on circularly polarized light selective membrane and infrabasal plate, form a flatness layer 60, but guard circle polarized light selective membrane, and form flat surfaces, be beneficial to down the formation of transparency electrode.Planar film can be for example hyaline membrane such as resin.
As shown in Figure 7, utilize the structure of this LCD, when light source was backlight, non-polarization light 71 produced linear polarisation upwards by the first left-handed line Polarizer 32, then by first phase shift films 34 of quarter-wave plate, formed left circularly polarized light 72.The left circularly polarized light of a part can arrive photic zone, and upwards by glass substrate 36, flatness layer 60, transparency electrode 40, and alignment film 56 down down, all remain left circularly polarized light, further by liquid crystal layer the time, because when the liquid crystal of liquid crystal layer does not receive voltage, be horizontal, thickness of liquid crystal layer is set at and makes that the product of poor (Δ n) and thickness (d) of unusual optical index of the ordinary refraction index of contained liquid crystal in the liquid crystal layer and liquid crystal is 1/2 of a lambda1-wavelength, has the function that postpones 180 ° of phase of light wave.So when left circularly polarized light passes through this liquid crystal layer, be changed to right-circularly polarized light 73, then, upwards by last alignment film 58, last transparency electrode 44, upper substrate 46 still is a right-circularly polarized light.Second phase shift films, 48 backs by the quarter-wave plate form linearly polarized light again, and this linearly polarized light direction is identical with the second line Polarizer 50, so can pass through the second line Polarizer 50, is linearly polarized light 74, and the user promptly sees the demonstration of bright attitude.
And upwards arrive reflection/penetrating region 54 at the left circularly polarized light 72 that non-polarization light 71 forms by first phase shift films, 34 backs, after by lower glass substrate 36, can arrive circularly polarized light selective membrane 38, it is left-handed cholesterol liquid crystal, makes left circularly polarized light not pass through, and but can reflect, downwards by lower glass substrate 36, by reverting to linearly polarized light behind first phase shift films 34, continue to penetrate downwards again, be linearly polarized light 75 by the first line Polarizer 32.Therefore, the user is on the reflection/penetrating region of display, and what see is the demonstration of dark attitude.And with the display result that photic zone merges, be the demonstration of bright attitude.
When light source is environment light source, opticpath and variation are as shown in Figure 8, non-polarization light 71 is downwards by the second line Polarizer 50, produce linear polarisation, then by behind second phase shift films 48, form right-circularly polarized light 73, downwards by behind the not alive horizontal liquid crystal layer, form left circularly polarized light 72, its part remains left circularly polarized light 72 by photic zone 52, form linearly polarized light by first phase shift films, 34 backs downwards again, this linearly polarized light direction is identical with the first line Polarizer 32, thus can pass through the first line Polarizer 32, for linearly polarized light 75 penetrates.And, by the left circularly polarized light that forms behind the liquid crystal layer, arrive reflection/penetrating region 54, downward by behind transparency electrode 40 under alignment film 56 reaches down and the flatness layer 60, can arrive circularly polarized light selective membrane 38, because of it comprises left-handed cholesterol liquid crystal, therefore, can't pass through this circularly polarized light selective membrane 38, and be reflected, still be left circularly polarized light 72.Upwards by behind flatness layer 60, following transparency electrode 40, the following alignment film 56, it still is left circularly polarized light 72, and after upwards passing through liquid crystal layer 42, form right-circularly polarized light 73, upwards form linearly polarized light by second phase shift films, 48 backs, this linearly polarized light direction is identical with the second line Polarizer 50, so can pass through the second line Polarizer 50, be linearly polarized light 74, user thereby see that bright attitude shows.
Known to last, above-mentioned according to a specific embodiment of the present invention in, no matter using backlight or two kinds of situations of environment light source,, all can reach the demonstration of bright attitude to the time not to the situation of liquid crystal applied voltages.
Still consult the structure of Fig. 7 or Fig. 8, but be when liquid crystal layer is applied voltage, this moment, liquid crystal formed homeotropic alignment, the function that does not postpone phase of light wave, that is, Δ n * d=0, so, when same use back light, arriving the left circularly polarized light of photic zone 52, behind liquid crystal layer 42, still is left circularly polarized light, continuing to arrive second phase shift films, 48 back formation linearly polarized lights, this linearly polarized light direction is different with the second line Polarizer 50, thus can't pass through the second line Polarizer 50, therefore, in such cases, what the user saw for photic zone 52 is the demonstration of dark attitude.And the left circularly polarized light of arrival reflection/penetrating region 54 can not pass through circularly polarized light selective membrane 38, and be reflected, and then penetrate by first phase shift films 34 and the first line Polarizer 32 of quarter-wave plate, is linearly polarized light 75.Therefore, in such cases, what the user saw for reflection/penetrating region 54 is the demonstration of dark attitude.
And apply voltage at liquid crystal layer, the situation of environment for use light source, second phase shift films, 48 formed right-circularly polarized lights through the second line Polarizer 50 and 1/4 ripple plate, still be maintained right-circularly polarized light through behind the liquid crystal layer downwards, advance to first phase shift films, 34 backs at photic zone 52 and form linearly polarized light, this linearly polarized light direction is different with the first line Polarizer 32, thereby can't pass through, therefore, in such cases, what the user saw for photic zone 52 is the demonstration of dark attitude.And, arrive the right-circularly polarized light of reflection/penetrating region 54 downwards, because circularly polarized light selective membrane 38 is left-handed cholesterol liquid crystal, therefore downwards by circularly polarized light selective membrane 38, be right-circularly polarized light still, continue to first phase shift films 34 and the first line Polarizer 32, and can't pass through, therefore, in such cases, what the user saw for reflection/penetrating region 54 is the demonstration of dark attitude.
Known to last, in an above-mentioned foundation specific embodiment of the present invention,, to the situation of liquid crystal applied voltages the time, all can reach the demonstration of dark attitude no matter using backlight or two kinds of situations of environment light source.So,, liquid crystal is applied different voltages according to image signal, under back light or environment light source, can meet various GTG value demands, reach needed pixel and show with this structure.The collocation color filter also can form colour liquid crystal display device.
The liquid crystal initial state of revolving character and liquid crystal layer about the optical activity of LCD cooperation circularly polarized light generation device of the present invention and circularly polarized light selective membrane can have different specific embodiments.Comprehensive speech, when the employed first circularly polarized light generation device is left-handed rotatory polarization device, for example formed by line Polarizer and 1/4 ripple plate, the circularly polarized light selective membrane is left-handed cholesterol liquid crystal, and the second circularly polarized light generation device is a dextrorotation rotatory polarization device, when for example being formed by line Polarizer and 1/4 ripple plate, in photic zone and the formed display result of reflection/penetrating region for down shown in the tabulation 1.
Table 1
| When using the second circularly polarized light generation device of the first left-handed circularly polarized light generation device, circularly polarized light selective membrane that left-handed cholesterol liquid crystal film is constituted, dextrorotation | |||
| The thickness condition of liquid crystal layer satisfies | Light source | The bright dark result who shows | |
| Photic zone | Reflection/penetrating region | ||
| Δn×d＝λ/2 | Backlight | Bright | Secretly |
| Surround lighting | Secretly | Bright | |
| Δn×d＝0 | Backlight | Secretly | Secretly |
| Surround lighting | Secretly | Secretly | |
Δ n, d, λ such as above-mentioned definition.
When the employed first circularly polarized light generation device is a dextrorotation rotatory polarization device, for example formed by line Polarizer and 1/4 ripple plate, the circularly polarized light selective membrane is the cholesterol liquid crystal of dextrorotation, and the second circularly polarized light generation device is left-handed rotatory polarization device, when for example being formed by line Polarizer and 1/4 ripple plate, in photic zone and the formed display result of reflection/penetrating region for down shown in the tabulation 2.
Table 2
| When using circularly polarized light selective membrane that the cholesterol liquid crystal film of the first circularly polarized light generation device, the dextrorotation of dextrorotation constituted, the left-handed second circularly polarized light generation device | |||
| The thickness condition of liquid crystal layer satisfies | Light source | The bright dark result who shows | |
| Photic zone | Reflection/penetrating region | ||
| Δn×d＝λ/2 | Backlight | Bright | Secretly |
| Surround lighting | Secretly | Bright | |
| Δn×d＝0 | Backlight | Secretly | Secretly |
| Surround lighting | Secretly | Secretly | |
Listed result shows by table 1 and table 2, when liquid crystal is horizontal direction matching evenly distributed, be normal white situation (normally white condition), and when liquid crystal is vertically aligned arrangement, be normal black situation (normally black condition).
When the employed first circularly polarized light generation device is left-handed rotatory polarization device, for example formed by line Polarizer and 1/4 ripple plate, the circularly polarized light selective membrane is left-handed cholesterol liquid crystal, and the second circularly polarized light generation device is left-handed rotatory polarization device, when for example being formed by line Polarizer and 1/4 ripple plate, in photic zone and the formed display result of reflection/penetrating region for down shown in the tabulation 3.
Table 3
| When using the first left-handed circularly polarized light generation device, circularly polarized light selective membrane that left-handed cholesterol liquid crystal film is constituted, the left-handed second circularly polarized light generation device | |||
| The thickness condition of liquid crystal layer satisfies | Light source | The bright dark result who shows | |
| Photic zone | Reflection/penetrating region | ||
| Δn×d＝λ/2 | Backlight | Secretly | Secretly |
| Surround lighting | Secretly | Secretly | |
| Δn×d＝0 | Backlight | Bright | Secretly |
| Surround lighting | Secretly | Bright | |
When the employed first circularly polarized light generation device is a dextrorotation rotatory polarization device, for example formed by line Polarizer and 1/4 ripple plate, the circularly polarized light selective membrane is the cholesterol liquid crystal of dextrorotation, and the second circularly polarized light generation device is a dextrorotation rotatory polarization device, when for example being formed by line Polarizer and 1/4 ripple plate, in photic zone and the formed display result of reflection/penetrating region for down shown in the tabulation 4.
Table 4
| When using the second circularly polarized light generation device of cholesterol liquid crystal film, dextrorotation of the first circularly polarized light generation device, the dextrorotation of dextrorotation | |||
| The thickness condition of liquid crystal layer satisfies | Light source | The bright dark result who shows | |
| Photic zone | Reflection/penetrating region | ||
| Δn×d＝λ/2 | Backlight | Secretly | Secretly |
| Surround lighting | Secretly | Secretly | |
| Δn×d＝0 | Backlight | Bright | Secretly |
| Surround lighting | Secretly | Bright | |
The result listed by table 3 and table 4 shows, when liquid crystal is horizontal direction matching evenly distributed, be normal black situation (normally black condition), and when liquid crystal is vertically aligned arrangement, be normal white situation (normally white condition).
See also Fig. 9 and Figure 10, this is the synoptic diagram according to another specific embodiment of LCD of the present invention, and shows the path and the variation of light.Further have a light-absorption layer 64 at reflection/penetrating region 54, be positioned at the downside of circularly polarized light selective membrane, function is for absorbing the light that is penetrated by the circularly polarized light selective membrane downwards, and so, panel is difficult for that the exposure phenomenon is arranged, and demonstration can be more clear.The example of light-absorption layer can be black resin (black resin).
According to structure and the bright dark demonstration that further has the LCD of light-absorption layer 64 of the present invention, same as described above, repeat no more.The position of light-absorption layer 64 is to absorb unwanted light and gets final product, so also can be at the downside of infrabasal plate 36.As shown in figure 11, when circularly polarized light selective membrane 38 was positioned at the downside of infrabasal plate 36, light-absorption layer 64 was positioned at the downside of circularly polarized light selective membrane 38.Can form flatness layer 60, with superimposed in the lower surface of light-absorption layer 64 with infrabasal plate 36 with first phase shift films 34.
In addition, notice that the reflection wavelength of cholesterol liquid crystal has certain limit, shown in II and formula III:
The centre wavelength of scope is λ=n
Avg/ 4 * P formula II
Frequency range is Δ λ=Δ n/4 * P=(n
e-n
o)/4 * P formula III
In the formula, n
AvgBe mean refractive index, P is the liquid crystal pitch, n
eBe unusual optical index, n
oBe ordinary refraction index.When the wavelength frequency range of reflection is too narrow, can causes the optical wavelength of reflection can't contain the zone of whole white light, and cause demonstration not go out correct white.Therefore, in LCD of the present invention, can further between Polarizer and 1/4 ripple plate, add a slice 1/2 ripple plate,, so, the frequency range of reflection is increased relatively to increase the frequency range that incident light forms circularly polarized light.Be example for example, 1/2 ripple plate 33 can be placed between the first line Polarizer 32 and first phase shift films 34,1/2 ripple plate 49 is placed between the second line Polarizer 50 and second phase shift films 48 with LCD shown in Figure 12 30.
Can comply with existing technology manufacturing easily according to LCD of the present invention, but when forming the circularly polarized light selective membrane, can use act to make from (lift-off) method, for example, on glass substrate, form earlier a photoresist layer, utilize the lithography method will reflect/photoresistance of penetrating region removes, apply one deck circularly polarized light selective membrane material, cholesterol liquid crystal for example, the residue photoresistance is divested together with the circularly polarized light selective membrane material that is coated on the photoresistance, promptly stay needed circularly polarized light selective membrane and be positioned on the glass substrate of reflection/penetrating region.Another kind of method for making, can form one deck flatness layer (over coat) earlier on glass substrate, correspondence position definition groove area pours into circularly polarized light selective membrane material then on flatness layer, cholesterol liquid crystal for example, and form the circularly polarized light selective membrane in reflection/penetrating region.Maybe can utilize the lithography method; apply one deck circularly polarized light selective membrane material earlier; cover a patterned photoresistance again and be used as protective seam; for example use hydrofluorite (HF); the circularly polarized light selective membrane material that directly will not cover photoresistance removes, and stays needed circularly polarized light selective membrane and is positioned on the glass substrate of reflection/penetrating region.When using cholesterol liquid crystal as the material of circularly polarized light selective membrane, its pitch can be adjusted agent (chiralagent) and is adjusted to required by adding optical activity.For example in the manufacturing of liquid crystal layer, can utilize alignment film to carry out alignment manufacture process again, the liquid crystal arrangement of liquid crystal layer is closed in required.Therefore, can make easily according to LCD of the present invention.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claims scope of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (19)
1, a kind of display panel is characterized in that, comprising:
One infrabasal plate;
One upper substrate, parallel is arranged at above this infrabasal plate; And
A most pixel cell, be located between this infrabasal plate and this upper substrate, and each pixel cell comprises a penetrating region and a reflection/penetrating region that this penetrates fauna in order to allow light pass through, this reflection/penetrating region comprises a circularly polarized light selective membrane, allows light pass through or reflects with selectivity.
2, described display panel as claimed in claim 1 is characterized in that, this circularly polarized light selective membrane comprises the cholesterol liquid crystal of a helical arrangement.
3, described display panel as claimed in claim 1 is characterized in that, this reflection/penetrating region more comprises a light-absorption layer.
4, described display panel as claimed in claim 3 is characterized in that, this light-absorption layer comprises black resin.
5, a kind of LCD is characterized in that, comprising:
One infrabasal plate;
One upper substrate, parallel is arranged at above this infrabasal plate;
A most pixel cell, be located between this infrabasal plate and this upper substrate, each pixel cell comprises transparency electrode on, a liquid crystal layer, transparency electrode once, and each pixel cell has a penetrating region and a reflection/penetrating region, this penetrates fauna in order to allow light pass through, this reflection/penetrate fauna comprises a circularly polarized light selective membrane, allows light pass through or reflects with selectivity;
One first circularly polarized light generation device is positioned at the downside of this infrabasal plate; And
One second circularly polarized light generation device is positioned at the upside of this upper substrate.
6, described LCD as claimed in claim 5 is characterized in that, this circularly polarized light selective membrane comprises the cholesterol liquid crystal of a helical arrangement.
7, described LCD as claimed in claim 5, it is characterized in that, the first circularly polarized light generation device is the stacked of one first line Polarizer and one first phase shift films, and the second circularly polarized light generation device is the stacked of one second line Polarizer and one second phase shift films.
8, described LCD as claimed in claim 7 is characterized in that, this first phase shift films is that 1/4 ripple plate and this second phase shift films are 1/4 ripple plate.
9, described LCD as claimed in claim 8 is characterized in that, further comprises one the 1 ripple plate between this first phase shift films and this first line Polarizer, and one the 2 1/2 ripple plate is between this second phase shift films and this second line Polarizer.
10, described LCD as claimed in claim 8, it is characterized in that, the thickness of this liquid crystal layer is, makes the difference of unusual optical index of the ordinary refraction index of contained liquid crystal in this liquid crystal layer and this liquid crystal and the product of this thickness, 0 and lambda1-wavelength 1/2 between.
11, described LCD as claimed in claim 5, it is characterized in that, this first circularly polarized light generation device is the right-hand circular polarization light generating device, this second circularly polarized light generation device is the Left-hand circular polarization light generating device, and the circularly polarized light selective membrane of this circularly polarized light selective membrane for left circularly polarized light is reflected and right-circularly polarized light is passed through.
12, described LCD as claimed in claim 5, it is characterized in that, this first circularly polarized light generation device is the Left-hand circular polarization light generating device, this second circularly polarized light generation device is the right-hand circular polarization light generating device, and the circularly polarized light selective membrane of this circularly polarized light selective membrane for right-circularly polarized light is reflected and left circularly polarized light is passed through.
13, described LCD as claimed in claim 5, it is characterized in that, this first circularly polarized light generation device is the Left-hand circular polarization light generating device, this second circularly polarized light generation device is the Left-hand circular polarization light generating device, and the circularly polarized light selective membrane of this circularly polarized light selective membrane for left circularly polarized light is reflected and right-circularly polarized light is passed through.
14, described LCD as claimed in claim 5, it is characterized in that, this first circularly polarized light generation device is the right-hand circular polarization light generating device, this second circularly polarized light generation device is the right-hand circular polarization light generating device, and the circularly polarized light selective membrane of this circularly polarized light selective membrane for right-circularly polarized light is reflected and left circularly polarized light is passed through.
15, described LCD as claimed in claim 5 is characterized in that, this circularly polarized light selective membrane is between infrabasal plate and following transparency electrode.
16, described LCD as claimed in claim 5 is characterized in that, further comprises a flatness layer, covers this circularly polarized light selective membrane and this infrabasal plate, and forms a flat surfaces.
17, described LCD as claimed in claim 5 is characterized in that, this circularly polarized light selective membrane is between this infrabasal plate and the second circularly polarized light generation device.
18, described display panel as claimed in claim 5 is characterized in that, this reflection/penetrating region more comprises a light-absorption layer, the light that passes through with absorption.
As the described LCD of claim 18, it is characterized in that 19, this light-absorption layer comprises black resin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100044946A CN101021630B (en) | 2006-02-15 | 2006-02-15 | Display panel and liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100044946A CN101021630B (en) | 2006-02-15 | 2006-02-15 | Display panel and liquid crystal display device |
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| Publication Number | Publication Date |
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| CN101021630A true CN101021630A (en) | 2007-08-22 |
| CN101021630B CN101021630B (en) | 2011-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006100044946A Expired - Fee Related CN101021630B (en) | 2006-02-15 | 2006-02-15 | Display panel and liquid crystal display device |
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| CN (1) | CN101021630B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101833193B (en) * | 2009-03-13 | 2014-04-02 | 北京京东方光电科技有限公司 | Semi-transparent type crystal liquid display, transparent substrate and manufacturing method thereof |
| CN107978689A (en) * | 2016-10-24 | 2018-05-01 | 上海和辉光电有限公司 | Organic electroluminescence display panel, display device and display panel production method |
| CN108829295A (en) * | 2018-06-12 | 2018-11-16 | 业成科技（成都）有限公司 | Touch panel |
| CN113960838A (en) * | 2020-07-20 | 2022-01-21 | 虹曜电纸技术股份有限公司 | Reflective cholesterol liquid crystal display device |
| CN114051592A (en) * | 2019-06-27 | 2022-02-15 | 株式会社理光 | Optical device, image display and optometry apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100301854B1 (en) * | 1999-06-02 | 2001-09-29 | 구본준, 론 위라하디락사 | Transmission-reflection type liquid crystal display device |
| JP3941481B2 (en) * | 2000-12-22 | 2007-07-04 | セイコーエプソン株式会社 | Liquid crystal display device and electronic device |
| KR100883986B1 (en) * | 2002-07-09 | 2009-02-17 | 엘지디스플레이 주식회사 | LCD with CLC color filter and CLC polariser |
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- 2006-02-15 CN CN2006100044946A patent/CN101021630B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833193B (en) * | 2009-03-13 | 2014-04-02 | 北京京东方光电科技有限公司 | Semi-transparent type crystal liquid display, transparent substrate and manufacturing method thereof |
| CN107978689A (en) * | 2016-10-24 | 2018-05-01 | 上海和辉光电有限公司 | Organic electroluminescence display panel, display device and display panel production method |
| CN108829295A (en) * | 2018-06-12 | 2018-11-16 | 业成科技（成都）有限公司 | Touch panel |
| CN108829295B (en) * | 2018-06-12 | 2021-04-13 | 业成科技（成都）有限公司 | Touch panel |
| CN114051592A (en) * | 2019-06-27 | 2022-02-15 | 株式会社理光 | Optical device, image display and optometry apparatus |
| CN113960838A (en) * | 2020-07-20 | 2022-01-21 | 虹曜电纸技术股份有限公司 | Reflective cholesterol liquid crystal display device |
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| Publication number | Publication date |
|---|---|
| CN101021630B (en) | 2011-06-08 |
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