CN100483191C - Semi-penetration and semi-reflective liquid crystal display device - Google Patents
Semi-penetration and semi-reflective liquid crystal display device Download PDFInfo
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- CN100483191C CN100483191C CNB2004100512576A CN200410051257A CN100483191C CN 100483191 C CN100483191 C CN 100483191C CN B2004100512576 A CNB2004100512576 A CN B2004100512576A CN 200410051257 A CN200410051257 A CN 200410051257A CN 100483191 C CN100483191 C CN 100483191C
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Abstract
The semi-penetrating semi-reflecting liquid crystal display device includes an upper baseplate, a lower baseplate, a liquid crystal layer positioned between said upper baseplate and said lower baseplate, a common electrode placed on upper baseplate, pixel electrode formed on lower baseplate, said pixel electrode, common electrode and liquid crystal layer positioned between them are formed into several pixel regions, every pixel region has a reflecting region electrode and a penetrating region electrode. Said invention also provides the concrete structure of said liquid crystal layer. Said liquid crystal display device has the characteristics of high contrast and good viewing angle.
Description
[technical field]
The invention relates to a kind of liquid crystal indicator, especially about a kind of semi-penetrating semi-reflecting type liquid crystal displaying device.
[background technology]
Liquid crystal indicator is because of characteristics such as have low diathermaneity, volume is compact and power consumption is low, thus day by day extensive on using, and along with the ripe and innovation of correlation technique, its kind is also various day by day.
According to the difference of light source that liquid crystal indicator utilizes, can be divided into penetration liquid crystal display device and reflective LCD device.Penetration liquid crystal display device must be provided with a backlight in the display panels back side and show to realize image, and still, the power consumption of backlight accounts for half of whole penetration liquid crystal display device power consumption, so the power consumption of penetration liquid crystal display device is bigger.Reflective LCD device can solve the big problem of penetration liquid crystal display device power consumption, but is difficult to realize that image shows under the faint environment of light.Semi-penetrating semi-reflecting type liquid crystal displaying device can solve above problem.
See also Fig. 1, prior art semi-penetrating semi-reflecting type liquid crystal displaying device 1 comprises that two relative transparent lower substrate 11 and upper substrate 12, liquid crystal layers 13 are clipped between this infrabasal plate 11 and the upper substrate 12.One transparent common electrode 14 and an alignment film 18 are successively set on the inner surface of this upper substrate 12, on one on the retardation plate 122 and a Polarizer 121 be successively set on the outer surface of this upper substrate 12.One transparency electrode 17, a passivation layer 16, a reflecting electrode 15 and an alignment film 19 are successively set on the inner surface of this infrabasal plate 11, wherein this passivation layer 16 and reflecting electrode 15 tools one opening 151.Once retardation plate 112 and once Polarizer 111 be successively set on the outer surface of this infrabasal plate 11.
Should go up retardation plate 122 is quarter-wave lengthy motion picture (λ/4) with following retardation plate 112, and alignment film 18,19 is horizontal direction matching (Homogeneous Alignment), and last Polarizer 121 is orthogonal with the polarization direction of following Polarizer 111.Reflecting electrode 15 is the metallic aluminium (Al) of high reflectance, transparent common electrode 14 and transparency electrode 17 be transparent conductive material such as tin indium oxide (Indium Tin Oxide, ITO) or indium zinc oxide (IndiumZinc Oxide, IZO).Liquid crystal layer 13 has different thickness, and wherein the thickness of transparent common electrode 14 and 15 liquid crystal layers 13 of reflecting electrode is d
11, the thickness of transparent common electrode 14 and 17 liquid crystal layers 13 of transparency electrode is d
12, d wherein
12Be approximately d
11Twice.Thickness of liquid crystal layer is d
11The zone be reflector space, thickness of liquid crystal layer is d
12The zone be penetration region.
The optical delay of the liquid crystal layer 13 of reflector space is:
Δn·d
11＝λ/4
Because d
12Be approximately d
11Twice, so the optical delay of the liquid crystal layer 13 of penetration region is:
Δn·d
12＝λ/2
Wherein Δ n is the birefraction of liquid crystal layer 13, and λ is the wavelength of light.
See also Fig. 2, be the bright attitude of semi-penetrating semi-reflecting type liquid crystal displaying device and the Liquid Crystal Molecules Alignment synoptic diagram under the dark attitude.The liquid crystal molecule along continuous straight runs is not arranged when applying voltage, because the optical delay of the liquid crystal layer 13 of reflector space is λ/4, the optical delay of the liquid crystal layer 13 of penetration region is λ/2, so this semi-penetrating semi-reflecting type liquid crystal displaying device 1 is bright attitude.Liquid crystal molecule is arranged along the direction perpendicular to substrate 11,12 when applying voltage, and the optical delay of liquid crystal layer 13 is 0, so this semi-penetrating semi-reflecting type liquid crystal displaying device 1 is dark attitude.Can realize that by the voltage that applies different value different GTGs shows.
But, when applying voltage, owing to have grasp energy (Anchoring Energy) between alignment film 18,19 and near the liquid crystal molecule that is positioned at it, near the alignment film 18,19 liquid crystal molecule can not be arranged along the direction perpendicular to substrate 11,12 fully, and light through this liquid crystal layer 13 can the time owing in the echo area and the light path difference of penetrating region, have optical path difference, so the generation optical delay makes this semi-penetrating semi-reflecting type liquid crystal displaying device 1 have light leakage phenomena when dark attitude.See also Fig. 3, be the voltage of prior art semi-penetrating semi-reflecting type liquid crystal displaying device 1 and the curve map of penetrance, when voltage raise gradually (when reaching 5V), the penetrance of this semi-penetrating semi-reflecting type liquid crystal displaying device 1 is not 0, that is to say and to realize this moment complete deceiving, still there is part light to pass through, can't realizes the demonstration of dark attitude, thereby influence its contrast and viewing angle characteristic.
[summary of the invention]
In order to overcome the low problem that reaches the viewing angle characteristic difference of liquid crystal indicator contrast in the prior art, the invention provides the semi-penetrating semi-reflecting type liquid crystal displaying device of a kind of tool high-contrast and good viewing angle characteristic.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of semi-penetrating semi-reflecting type liquid crystal displaying device is provided, it comprises: a upper substrate, one infrabasal plate, one liquid crystal layer between this upper substrate and this infrabasal plate, one public electrode is arranged on upper substrate, pixel electrode is formed at infrabasal plate, this pixel electrode, public electrode and the liquid crystal layer that is positioned in the middle of it constitute a plurality of pixel regions, this each pixel region tool one echo area electrode and a penetrating region electrode, wherein this liquid crystal layer is that 0 degree is to 15 degree near a side liquid crystal molecule tilt angle of substrate, opposite side liquid crystal molecule tilt angle is that 75 degree are to 90 degree, the echo area electrode of this pixel electrode and penetrating region electrode surface all are provided with a plurality of raised structures in this technical scheme, passivation layer is set between this upper substrate and this public electrode at interval, to form a plurality of open regions, this open region is to should the penetrating region electrode, this passivation layer is to should the echo area electrode, and the thickness of the liquid crystal layer corresponding with this open region greater than with the thickness of the corresponding liquid crystal layer of this passivation layer.
Compared to existing technology, the invention has the beneficial effects as follows: on first retardation plate and first time retardation plate can be when applying voltage owing to liquid crystal molecule and not exclusively arrange the residue optical phase put-off that causes and compensate perpendicular to substrate, thereby the light leakage phenomena when reducing dark attitude, improve the contrast of this semi-penetrating semi-reflecting type liquid crystal displaying device, the penetration region of this semi-penetrating semi-reflecting type liquid crystal displaying device has different liquid crystal gap thickness with reflector space, and the echo area electrode of this echo area and penetrating region electrode surface all are provided with a plurality of raised structures, can improve the viewing angle characteristic of echo area, it is fast to have response, characteristics such as driving voltage is low, and improve the uniformity coefficient of this semi-penetration, semi-reflective liquid-crystal apparatus display brightness and color.
[description of drawings]
Fig. 1 is the diagrammatic cross-section of prior art semi-penetrating semi-reflecting type liquid crystal displaying device.
Fig. 2 is the bright attitude of prior art semi-penetrating semi-reflecting type liquid crystal displaying device and the Liquid Crystal Molecules Alignment synoptic diagram under the dark attitude.
Fig. 3 is the penetrance and the driving voltage graph of relation of prior art semi-penetrating semi-reflecting type liquid crystal displaying device.
Fig. 4 is the diagrammatic cross-section of semi-penetrating semi-reflecting type liquid crystal displaying device first embodiment of the present invention.
Fig. 5 is the diagrammatic cross-section of semi-penetrating semi-reflecting type liquid crystal displaying device second embodiment of the present invention.
Fig. 6 is the diagrammatic cross-section of semi-penetrating semi-reflecting type liquid crystal displaying device the 3rd embodiment of the present invention.
Fig. 7 is the diagrammatic cross-section of semi-penetrating semi-reflecting type liquid crystal displaying device the 4th embodiment of the present invention.
Fig. 8 is the diagrammatic cross-section of semi-penetrating semi-reflecting type liquid crystal displaying device the 5th embodiment of the present invention.
Fig. 9 is the diagrammatic cross-section of semi-penetrating semi-reflecting type liquid crystal displaying device the 6th embodiment of the present invention.
[embodiment]
Fig. 4 is the diagrammatic cross-section of semi-penetrating semi-reflecting type liquid crystal displaying device first embodiment of the present invention, semi-penetrating semi-reflecting type liquid crystal displaying device 10 of the present invention comprise a upper substrate 22, one and the infrabasal plate 21, that is oppositely arranged of upper substrate 22 be positioned at the liquid crystal layer 111 of 22,21 of this two substrates, this liquid crystal layer 111 comprises a plurality of eurymeric liquid crystal molecules.
The outer surface of this upper substrate 22 sets gradually on one first Polarizer 32 on the retardation plate 52 and.The inner surface of this upper substrate 22 sets gradually alignment film 42 on a public electrode 221 and.This public electrode 221 is a transparent conductive material, as tin indium oxide (ITO) or indium zinc oxide (IZO).
The liquid crystal molecule of this liquid crystal layer is mixed orientation (Hybrid Alignment), promptly this liquid crystal layer is horizontal direction matching (Homogeneous Alignment) near a side of substrate, its liquid crystal molecule tilt angle be 0 the degree to 15 the degree, opposite side be vertical orientation (VerticalAlignment) liquid crystal molecule tilt angle be 75 the degree to 90 the degree.Can mix optically active substance in this liquid crystal layer, make that liquid crystal molecule is easier to reverse.
The outer surface of this infrabasal plate 21 sets gradually one first time retardation plate 51 and reaches Polarizer 31.Through electrode 212 and reflecting electrode 211 are arranged on the inboard of this infrabasal plate 21, constitute pixel electrode together, when applying voltage, 221 of pixel electrode and this public electrodes produce one perpendicular to the deflection with the control liquid crystal molecule of the electric field of substrate 22,21, and display image shows.This through electrode 212 is a transparent conductive material, and as tin indium oxide (ITO), this reflecting electrode 211 is the metal material of tool high reflectance, as aluminium (Al).
This pixel electrode, public electrode 221 and the liquid crystal layer 111 that is positioned at wherein constitute a pixel region.Wherein, with reflecting electrode 211 pairing pixel regions be reflector space, with through electrode 212 pairing pixel regions be penetration region.
The thickness of this reflector space liquid crystal layer is less than the thickness of this penetration region liquid crystal layer, in the present embodiment thickness of reflector space liquid crystal layer be approximately the penetration region liquid crystal layer thickness 1/2nd.Be provided with a passivation layer 71 between this echo area electrode 211 and this infrabasal plate 21, this passivation layer 71 makes the thickness of this reflector space liquid crystal layer less than the thickness of this penetration region liquid crystal layer, the surface of this echo area electrode 211 is provided with a plurality of raised structures 61, these a plurality of raised structures 61 can improve the outgoing briliancy of reflector space, thereby make this semi-penetrating semi-reflecting type liquid crystal displaying device have brightness height, display characteristic that color is good.
External ambient light is transformed into the polarization direction linearly polarized light parallel with the polarization axle of last Polarizer 32 through behind the last Polarizer 32, behind this polarized light process upper substrate 22 and the liquid crystal layer 111, reflex by reflecting electrode 211 realizes that by the liquid crystal layer 111 of reflector space image shows once more, and the surface of this reflecting electrode 211 is provided with a plurality of raised structures 61, these a plurality of raised structures 61 can reflect light to different directions, thereby improve the brightness and the color contrast of this semi-penetrating semi-reflecting type liquid crystal displaying device.
See also Fig. 5, the structural representation of semi-penetrating semi-reflecting type liquid crystal displaying device second embodiment of the present invention.The difference of the present embodiment and first embodiment is: this passivation layer 72 is arranged between this public electrode 221 and this upper substrate 22, and to should the echo area electrode and be provided with, make the thickness of this reflector space liquid crystal layer less than the thickness of this penetration region liquid crystal layer, this echo area electrode surface is provided with a plurality of raised structures 62.
See also Fig. 6, the structural representation of semi-penetrating semi-reflecting type liquid crystal displaying device the 3rd embodiment of the present invention.Semi-penetrating semi-reflecting type liquid crystal displaying device 20 of the present invention comprise a upper substrate 24, one and the infrabasal plate 23, that is oppositely arranged of upper substrate 24 be positioned at the liquid crystal layer 112 of 24,23 of this two substrates, this liquid crystal layer 112 comprises a plurality of eurymeric liquid crystal molecules.
The outer surface of this upper substrate 24 sets gradually on one first Polarizer 34 on the retardation plate 54 and.The inner surface of this upper substrate 24 sets gradually alignment film 44 on a public electrode 222 and.This public electrode 222 is a transparent conductive material, as tin indium oxide (ITO) or indium zinc oxide (IZO).
The liquid crystal molecule of this liquid crystal layer is mixed orientation (Hybrid Alignment), promptly this liquid crystal layer is horizontal direction matching (Homogeneous Alignment) near a side of substrate, its liquid crystal molecule tilt angle is that 0 degree is to 15 degree, opposite side is that vertical orientation (VerticalAlignment) liquid crystal molecule tilt angle is that 75 degree are to 90 degree, this liquid crystal layer can in mix optically active substance, make that liquid crystal molecule is easier to reverse.
The outer surface of this infrabasal plate 23 sets gradually one first time retardation plate 53 and reaches Polarizer 33.Through electrode 214 and reflecting electrode 213 are arranged on the inboard of this infrabasal plate 23, constitute pixel electrode together, produce an electric field perpendicular to substrate 23,24 in 222 of public electrodes and show with display image with the deflection of controlling liquid crystal molecule.This through electrode 214 is a transparent conductive material, and as tin indium oxide (ITO), this reflecting electrode 213 is the metal material of tool high reflectance, as aluminium (Al).
This pixel electrode, public electrode 222 and the liquid crystal layer 112 that is positioned at wherein constitute a pixel region.Wherein, with reflecting electrode 213 pairing pixel regions be reflector space, with through electrode 214 pairing pixel regions be penetration region.The liquid crystal layer 112 that external environment light passes through reflector space by liquid crystal layer 112 backs of reflector space once more by the reflex of reflecting electrode 213 realizes that image shows.
The thickness of this reflector space liquid crystal layer is less than the thickness of this penetration region liquid crystal layer, in the present embodiment thickness of reflector space liquid crystal layer be approximately the penetration region liquid crystal layer thickness 1/2nd.Be provided with a passivation layer 73 between this echo area electrode 213 and this infrabasal plate 23, this passivation layer 71 makes the thickness of this reflector space liquid crystal layer less than the thickness of this penetration region liquid crystal layer, the surface of this echo area electrode 213 and penetrating region electrode 214 is provided with a plurality of raised structures 63, these a plurality of raised structures 63 can improve the outgoing briliancy of reflector space and penetration region, thereby make this semi-penetrating semi-reflecting type liquid crystal displaying device have brightness height, display characteristic that color contrast is good.
See also Fig. 7, the structural representation of semi-penetrating semi-reflecting type liquid crystal displaying device the 4th embodiment of the present invention.The difference of present embodiment and the 3rd embodiment is: this passivation layer 74 is arranged between this public electrode 222 and this upper substrate 24, and to should the echo area electrode and be provided with, make the thickness of this reflector space liquid crystal layer less than the thickness of this penetration region liquid crystal layer, this echo area electrode and penetrating region electrode surface are provided with a plurality of raised structures 64.
See also Fig. 8, the structural representation of semi-penetrating semi-reflecting type liquid crystal displaying device the 5th embodiment of the present invention, semi-penetrating semi-reflecting type liquid crystal displaying device 30 of the present invention comprise a upper substrate 26, one and the infrabasal plate 25, that is oppositely arranged of upper substrate 26 be positioned at the liquid crystal layer 113 of 26,25 of this two substrates, this liquid crystal layer 113 comprises a plurality of eurymeric liquid crystal molecules.
The outer surface of this upper substrate 26 sets gradually on one first Polarizer 36 on the retardation plate 56 and.The inner surface of this upper substrate 26 sets gradually alignment film 46 on a public electrode 223 and.This public electrode 223 is a transparent conductive material, as tin indium oxide (ITO) or indium zinc oxide (IZO).
The liquid crystal molecule of this liquid crystal layer is mixed orientation (Hybrid Alignment), promptly this liquid crystal layer is horizontal direction matching (Homogeneous Alignment) near a side of substrate, its liquid crystal molecule tilt angle is that 0 degree is to 15 degree, opposite side is that vertical orientation (VerticalAlignment) liquid crystal molecule tilt angle is that 75 degree are to 90 degree, can mix optically active substance in this liquid crystal layer, make that liquid crystal molecule is easier to reverse.
The outer surface of this infrabasal plate 25 sets gradually one first time retardation plate 55 and reaches Polarizer 35.Through electrode 216 and reflecting electrode 215 are arranged on the inboard of this infrabasal plate 25, constitute pixel electrode together, produce an electric field perpendicular to substrate 25,26 in 223 of public electrodes and show with display image with the deflection of controlling liquid crystal molecule.This through electrode 216 is a transparent conductive material, and as tin indium oxide (ITO), this reflecting electrode 215 is the metal material of tool high reflectance, as aluminium (Al).
This pixel electrode, public electrode 225 and the liquid crystal layer 13 that is positioned at wherein constitute pixel region.Wherein, with reflecting electrode 215 pairing pixel regions be reflector space, with through electrode 216 pairing pixel regions be penetration region.The liquid crystal layer 113 that external environment light passes through reflector space by liquid crystal layer 113 backs of reflector space once more by the reflex of reflecting electrode 215 realizes that image shows.
The thickness of this reflector space liquid crystal layer is less than the thickness of this penetration region liquid crystal layer, in the present embodiment thickness of reflector space liquid crystal layer be approximately the penetration region liquid crystal layer thickness 1/2nd.Be provided with a passivation layer 75 between this public electrode 215 and this upper substrate 26, this passivation layer 75 makes the thickness of this reflector space liquid crystal layer less than the thickness of this penetration region liquid crystal layer, the surface of this public electrode 215 is provided with a plurality of raised structures 65,65 pairs of these a plurality of raised structures should be provided with the echo area, can improve the outgoing briliancy of reflector space, thereby make this semi-penetrating semi-reflecting type liquid crystal displaying device have brightness height, display characteristic that color is good.
See also Fig. 9, the structural representation of semi-penetrating semi-reflecting type liquid crystal displaying device the 6th embodiment of the present invention, the difference of itself and first embodiment to the, five embodiments is: this liquid crystal layer and should go up between the polaroid and be provided with a colored filter 80, for obtaining the display effect of better color and brightness, this colored filter 80 with respect to the part of reflector space be provided with a plurality of holes or this colored filter 80 with respect to the segment thickness of reflector space greater than the segment thickness of this colored filter with respect to penetration region, can also be with this colored filter 80 with respect to the partial density of reflector space greater than the partial density of this colored filter with respect to penetration region.
Among the present invention on first retardation plate and first time retardation plate can be when applying voltage owing to liquid crystal molecule and not exclusively arrange the residue optical phase put-off that causes and compensate perpendicular to substrate, thereby the light leakage phenomena when reducing dark attitude, improve the contrast of this semi-penetrating semi-reflecting type liquid crystal displaying device, the penetration region of this semi-penetrating semi-reflecting type liquid crystal displaying device has different liquid crystal gap thickness with reflector space, and the electrode surface of this echo area is provided with a plurality of raised structures, can improve the visual angle of echo area, same reason is provided with a plurality of raised structures with the surface of this pixel electrode and the surface of this passivation layer, can further improve the viewing angle characteristic of this semi-penetrating semi-reflecting type liquid crystal displaying device.
Claims (6)
1. semi-penetrating semi-reflecting type liquid crystal displaying device, it comprises: a upper substrate, one infrabasal plate, one liquid crystal layer between this upper substrate and this infrabasal plate, one public electrode is arranged on upper substrate, one pixel electrode is formed at infrabasal plate, this pixel electrode, public electrode and the liquid crystal layer that is positioned in the middle of it constitute a plurality of pixel regions, this each pixel region tool one echo area electrode and a penetrating region electrode, it is characterized in that: this liquid crystal layer is that 0 degree is to 15 degree near a side liquid crystal molecule tilt angle of substrate, opposite side liquid crystal molecule tilt angle is that 75 degree are to 90 degree, the echo area electrode and the penetrating region electrode surface of this pixel electrode are provided with a plurality of raised structures, passivation layer is set between this upper substrate and this public electrode at interval, to form a plurality of open regions, this open region is to should the penetrating region electrode, and this passivation layer is to should the echo area electrode, and the thickness of the liquid crystal layer corresponding with this open region greater than with the thickness of the corresponding liquid crystal layer of this passivation layer.
2. according to the semi-penetrating semi-reflecting type liquid crystal displaying device of claim 1, it is characterized in that: this liquid crystal layer is mixed with optically active substance.
3. according to the semi-penetrating semi-reflecting type liquid crystal displaying device of claim 1, it is characterized in that: it further comprises a colored filter, and this colored filter is arranged on the outside of this this upper substrate.
4. according to the semi-penetrating semi-reflecting type liquid crystal displaying device of claim 3, it is characterized in that: this colored filter is provided with a plurality of holes with respect to the part of reflector space.
5. according to the semi-penetrating semi-reflecting type liquid crystal displaying device of claim 3, it is characterized in that: this colored filter with respect to the segment thickness of reflector space greater than the segment thickness of this colored filter with respect to penetration region.
6. according to the semi-penetrating semi-reflecting type liquid crystal displaying device of claim 3, it is characterized in that: this colored filter with respect to the partial density of reflector space greater than the partial density of this colored filter with respect to penetration region.
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| CNB2004100512576A CN100483191C (en) | 2004-08-25 | 2004-08-25 | Semi-penetration and semi-reflective liquid crystal display device |
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| CN100483191C true CN100483191C (en) | 2009-04-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102768379A (en) * | 2011-08-30 | 2012-11-07 | 明基材料有限公司 | Optical compensation film and production method thereof |
| US9019450B2 (en) | 2011-07-12 | 2015-04-28 | Benq Materials Corporation | Optical compensation film and method for manufacturing the same |
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| CN102645774B (en) * | 2011-02-22 | 2016-05-04 | 上海天马微电子有限公司 | A kind of liquid crystal indicator |
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| US9019450B2 (en) | 2011-07-12 | 2015-04-28 | Benq Materials Corporation | Optical compensation film and method for manufacturing the same |
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