CN101393335A - Half- penetration and half-reflection LCD - Google Patents
Half- penetration and half-reflection LCD Download PDFInfo
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- CN101393335A CN101393335A CNA2007100773423A CN200710077342A CN101393335A CN 101393335 A CN101393335 A CN 101393335A CN A2007100773423 A CNA2007100773423 A CN A2007100773423A CN 200710077342 A CN200710077342 A CN 200710077342A CN 101393335 A CN101393335 A CN 101393335A
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Abstract
The invention relates to a transflective LCD, which comprises a first substrate, a second substrate opposite to the first substrate, a liquid crystal layer between the first substrate and the second substrate, a first polaroid sheet arranged on the surface of the outside of the first substrate, a second polaroid sheet arranged on the surface of the outside of the second substrate, a common electrode layer, an insulating layer, a pixel electrode layer and a second alignment layer which are arranged on the surface of the inside of the second substrate in order, and a control electrode layer and a first alignment layer which are arranged on the surface of the inside of the first substrate, wherein the common electrode layer comprises a transmittance zone and a reflective zone; the control electrode layer is positioned in a zone corresponding to the transmittance zone, and is applied with a voltage, so that the inclination angle of liquid crystal molecules corresponding to the transmittance zone is larger than that of liquid crystal molecules corresponding to the reflective zone, and the birefringence of the liquid crystal molecules corresponding to the transmittance zone is improved. The transflective LCD does not need an internal delay chip to reduce the cost.
Description
Technical field
The present invention relates to a kind of semitransparent and half-reflective liquid crystal display, especially a kind of fringe field switching mode semitransparent and half-reflective liquid crystal display.
Background technology
LCD has characteristics such as low diathermaneity, compact and power consumption are low because of it, thus day by day extensive in the use, and along with the ripe and innovation of correlation technique, its kind is also various day by day.
According to the difference of utilization light source, liquid crystal indicator can be divided into penetration liquid crystal display device and reflective LCD device.Penetration liquid crystal display device must be provided with a backlight at the display panels back side and show to realize image, yet 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, yet is difficult to realize that image shows under the faint environment of light.Semi-penetrating semi-reflecting type liquid crystal displaying device then has both advantages.
Seeing also Fig. 1, is a kind of synoptic diagram of prior art semitransparent and half-reflective liquid crystal display.This LCD 10 is edge field switch type semitransparent and half-reflective liquid crystal displays.This LCD 10 comprises one first glass substrate 110, one second glass substrate 120 relative with this first glass substrate 110, one is clipped in this two glass substrates 110, liquid crystal layer 130 between 120, one is positioned at first polaroid 140 of these first glass substrate, 110 outer surfaces, one is positioned at second polaroid 150 of these second glass substrate, 120 outer surfaces, one is positioned at first both alignment layers 160 of these first glass substrate, 110 inner surfaces and is positioned at a common electrode layer 123 of these second glass substrate, 120 inner surfaces successively, one insulation course 121, one pixel electrode layer 122 and one second both alignment layers 170.This pixel electrode layer 122 comprises a plurality of pixel electrodes 1221.This common electrode layer 123 comprises a penetrating region 1231 and an echo area 1232.
The material of the common electrode layer 123 of this penetrating region 1231 is transparent conductive material such as tin indium oxide (ITO) or indium zinc oxide (IZO).The material of the common electrode layer 123 of this echo area 1232 is conductive material such as aluminium or the silver with high reflectance.The material of this pixel electrode 1221 is transparent conductive material such as tin indium oxide (ITO) or indium zinc oxide (IZO).
During these LCD 10 work, light from outside b arrives this echo area 1232 via this liquid crystal layer 130 and is penetrated via this liquid crystal layer 130 once more after its reflection, and promptly light from outside b passes this liquid crystal layer 130 for twice.And directly penetrate via this penetrating region 1231 and this liquid crystal layer 130 backs by the internal light a that a backlight module (figure does not show) sends, promptly this internal light a only once passes this liquid crystal layer 130.So, this internal light a is different with the light path of this extraneous light b, and this internal light a and this extraneous light b are respectively via producing a phase differential after the birefringence of this liquid crystal layer 130.
Seeing also Fig. 2, is the synoptic diagram of this LCD 10 internal light a and extraneous light b penetrance.Wherein, transverse axis is a gray scale voltage, and the longitudinal axis is the penetrance of light.Curve R is the penetrance of this extraneous light b, and curve T is the penetrance of this internal light a.Because there are a phase differential in this internal light a and this extraneous light b, thereby cause this internal light a different with the penetrance of this extraneous light b.The penetrance of this internal light a is less than the penetrance of this extraneous light b, and the too small light utilization efficiency of this backlight module that causes of the penetrance of this internal light is low excessively.
Seeing also Fig. 3, is the synoptic diagram of another kind of prior art semitransparent and half-reflective liquid crystal display.Compare with this LCD 10, this LCD 11 further comprises an internal latency sheet 180, and it is between first glass substrate and first both alignment layers and corresponding with this penetrating region.This internal latency sheet is used to compensate the phase differential of this internal light a and this extraneous light b.
Seeing also Fig. 4, is the synoptic diagram of this semitransparent and half-reflective liquid crystal display 11 internal light a and extraneous light b penetrance.Wherein, transverse axis is a gray scale voltage, and the longitudinal axis is the light penetration rate.Curve R ＇ is the penetrance of this extraneous light b, and curve T ＇ is the penetrance of this internal light a.Because the corresponding zone of this penetrating region is provided with this internal latency sheet 180, it can compensate the phase differential of this internal light a and this extraneous light b.Thereby the penetrance of this internal light a is improved, and it has improved the light utilization efficiency of this backlight module substantially near the penetrance of this extraneous light b.Yet this internal latency sheet 180 increases the cost of this LCD 11.
Summary of the invention
In order to solve semitransparent and half-reflective liquid crystal display cost problem of higher, be necessary to provide a kind of need not to use internal latency sheet thereby lower-cost semitransparent and half-reflective liquid crystal display.
A kind of semitransparent and half-reflective liquid crystal display comprises one first substrate, one second substrate that is oppositely arranged with this first substrate, one between this first substrate and this second substrate liquid crystal layer, one is arranged at first polaroid of this first substrate outer surface, one is arranged at second polaroid of this second substrate outer surface, be set in turn in a common electrode layer of the inner surface of this second substrate, one insulation course, one pixel electrode layer and one second both alignment layers and the control electrode layer and one first both alignment layers that are set in turn in the inner surface of this first substrate.This common electrode layer comprises a penetrating region and an echo area, this control electrode layer is positioned at and the corresponding zone of this penetrating region, it is applied in a voltage, feasible inclination angle ratio with the corresponding liquid crystal molecule of this penetrating region is big with the inclination angle of this corresponding liquid crystal molecule in echo area, has improved the birefraction with the corresponding liquid crystal molecule of this penetrating region.
Compared to prior art, semitransparent and half-reflective liquid crystal display of the present invention comprises a control electrode layer, and it is positioned at the inner surface of this semitransparent and half-reflective liquid crystal display first glass substrate, and corresponding with the penetrating region of this semitransparent and half-reflective liquid crystal display.This control electrode makes the inclination angle of liquid crystal molecule of this semitransparent and half-reflective liquid crystal display penetrating region correspondence and twist improve, thereby has improved the birefraction to internal light, makes the phase differential of this internal light and this extraneous light be compensated.Thereby semitransparent and half-reflective liquid crystal display of the present invention need not to use the internal latency sheet, reduced cost.
Description of drawings
Fig. 1 is a kind of synoptic diagram of prior art semitransparent and half-reflective liquid crystal display.
Fig. 2 is the penetrating region of semitransparent and half-reflective liquid crystal display shown in Figure 1 and the synoptic diagram of echo area light transmittance.
Fig. 3 is the synoptic diagram of another kind of prior art semitransparent and half-reflective liquid crystal display.
Fig. 4 is the penetrating region of semitransparent and half-reflective liquid crystal display shown in Figure 3 and the synoptic diagram of echo area light transmittance.
Fig. 5 is the synoptic diagram of semitransparent and half-reflective liquid crystal display first embodiment of the present invention.
Fig. 6 is the floor map of the control electrode of the semitransparent and half-reflective liquid crystal display shown in Figure 5 pixel electrode corresponding with penetrating region.
Fig. 7 is the synoptic diagram of semitransparent and half-reflective liquid crystal display second embodiment of the present invention.
Fig. 8 is the synoptic diagram of semitransparent and half-reflective liquid crystal display the 3rd embodiment of the present invention.
Fig. 9 is the synoptic diagram of semitransparent and half-reflective liquid crystal display the 4th embodiment of the present invention.
Embodiment
Seeing also Fig. 5, is the synoptic diagram of semitransparent and half-reflective liquid crystal display first embodiment of the present invention.This LCD 20 comprises one first glass substrate 210, one second glass substrate 220 relative with this first glass substrate 210, one is clipped in this two glass substrates 210, liquid crystal layer 230 between 220, one is positioned at first polaroid 240 of these first glass substrate, 210 outer surfaces, one is positioned at second polaroid 250 of these second glass substrate, 220 outer surfaces, be positioned at a control electrode layer 280 and one first both alignment layers 260 of these first glass substrate, 210 inner surfaces successively, be positioned at a common electrode layer 223 of these second glass substrate, 220 inner surfaces successively, one insulation course 221, one pixel electrode layer 222 and one second both alignment layers 270.
This common electrode layer 223 comprises a penetrating region 2231 and an echo area 2232.This control electrode layer 280 is positioned at these first glass substrate, 210 inner surfaces and this penetrating region 2231 corresponding zones.
The material of the common electrode layer 223 of this penetrating region 2231 is transparent conductive material such as tin indium oxide (ITO) or indium zinc oxide (IZO).The material of the common electrode layer 223 of this echo area 2232 is conductive material such as aluminium or the silver with high reflectance.The material of this pixel electrode layer 222 is transparent conductive material such as tin indium oxide (ITO) or indium zinc oxide (IZO).The material of this control electrode layer 280 is transparent conductive material such as tin indium oxide (ITO) or indium zinc oxide (IZO).
Seeing also Fig. 6, is the floor map of the corresponding pixel electrode layer 222 of control electrode layer 280 and the penetrating region 2231 of this semitransparent and half-reflective liquid crystal display 20.This pixel electrode layer 222 comprises a plurality of pixel electrodes that are parallel to each other 2221, and it is shaped as strip.The width of this pixel electrode 2221 is 1 μ m-15 μ m, and the distance between the two adjacent pixel electrodes 2221 is 1 μ m-15 μ m.The shape of this pixel electrode 2221 also can be bending shape or waveform.
This control electrode layer 280 comprises a plurality of control electrodes that are parallel to each other 2801, and 2221 relative the staggering of pixel electrode that it is corresponding with this penetrating region 2231, it is shaped as and this pixel electrode 2221 corresponding strips.The width of this control electrode 2221 is 1 μ m-15 μ m, and the distance between the two adjacent control electrodes 2221 is 1 μ m-15 μ m.The shape of this control electrode 2221 also can be and this pixel electrode 2221 corresponding bending shape or waveforms.
This first polaroid 240 is vertical mutually with the polarization direction of this second polaroid 250.This first both alignment layers 260 makes that with this second both alignment layers 270 liquid crystal molecule of this liquid crystal layer 230 is a horizontal direction matching, and tilt angle is 0 °-15 °.The alignment direction of these two both alignment layers 250,260 and the angle of this pixel electrode 2221 are 0 °-45 °, make that the long axis of liquid crystal molecule of this liquid crystal layer 230 and the angle of this pixel electrode 2221 are 0 °-45 °.
During these LCD 20 work, the pixel electrode 2221 of this penetrating region 2231 and these echo area 2232 correspondences produces a horizontal component of electric field, and the horizontal component of electric field intensity of this penetrating region 2231 and this echo area 2232 is identical.This horizontal component of electric field make this penetrating region 2231 and these echo area 2232 correspondences liquid crystal molecule the plane inward turning phase inversion that is parallel to these two glass substrates 210,220 with angle.This liquid crystal molecule has identical birefraction Δ n to the light via this penetrating region 2231 and this echo area 2232.The thickness of this liquid crystal layer is made as d, and then the phase delay of the light of this echo area 2232 is Δ n * 2d.
Yet because this first glass substrate 210 is provided with control electrode 2801 with these penetrating region 2231 corresponding zones, it is loaded a voltage, and the big I of this voltage is identical with the common electric voltage that this common electrode layer 223 loads.The liquid crystal layer 230 corresponding with this echo area 2232 compared, the liquid crystal layer 230 of these penetrating region 2231 correspondences produces a basic electric field vertical with horizontal direction, make the liquid crystal molecule inclination angle in vertical direction that 2231 pairs of this penetrating regions should liquid crystal layer 230 become big, thereby the birefraction of the liquid crystal molecule that 2231 pairs of this penetrating regions should liquid crystal layer 230 increase.To increase be 2 Δ n to liquid crystal molecule birefraction that should liquid crystal layer 230 when 2231 pairs of this penetrating regions, and the phase delay of these penetrating region 2231 light is 2 Δ n * d.Thereby 2231 pairs of this penetrating regions should liquid crystal layer 230 liquid crystal molecule to the phase delay of internal light a and this extraneous light b owing to the phase delay that optical path difference produces equates.Compared with prior art, this semitransparent and half-reflective liquid crystal display 20 need not to use an internal latency sheet to compensate this phase differential, thereby reduces the cost of this LCD 20.
Seeing also Fig. 7, is the synoptic diagram of semitransparent and half-reflective liquid crystal display second embodiment of the present invention.Compare with the semitransparent and half-reflective liquid crystal display 20 of first embodiment, its difference only is: this semitransparent and half-reflective liquid crystal display 30 further comprises retardation plate 350 and one first time retardation plate 360 on one first.Retardation plate 350 is between first polaroid and first glass substrate on first for this, and this first time retardation plate 360 is between second polaroid 350 and second glass substrate.This on first retardation plate 350 and this first time retardation plate 360 be quarter-wave plate (λ/4).This on first the polarization state of retardation plate 350 and 360 pairs of light of this first time retardation plate have compensating action, can make more rays see through this first polaroid, thereby improve the light utilization efficiency of this semitransparent and half-reflective liquid crystal display 30.
Seeing also Fig. 8, is the synoptic diagram of semitransparent and half-reflective liquid crystal display the 3rd embodiment of the present invention.Compare with the semitransparent and half-reflective liquid crystal display 30 of second embodiment, its difference only is: this semitransparent and half-reflective liquid crystal display 40 further comprises one first compensate film 450 and one second compensate film 460.This first compensate film 450 is between the retardation plate on first and first glass substrate, and this second compensate film 460 is between this first time retardation plate and second glass substrate.This first compensate film 450 and this second compensate film 460 are the disklike molecule film.The visual angle that this first compensate film 450 and this second compensate film 460 can improve this semitransparent and half-reflective liquid crystal display 40.
Seeing also Fig. 9, is the synoptic diagram of semitransparent and half-reflective liquid crystal display the 4th embodiment of the present invention.Compare with the semitransparent and half-reflective liquid crystal display 40 of the 3rd embodiment, its difference only is: this semitransparent and half-reflective liquid crystal display 50 further comprises retardation plate 550 and one second time retardation plate 560 on one second.Retardation plate 550 is on first polaroid and first between the retardation plate on second for this, and this second time retardation plate 560 is between second polaroid and first time retardation plate.This on second retardation plate 550 and one second time retardation plate 560 be 1/2nd wave plates (λ/2).This semitransparent and half-reflective liquid crystal display 50 is owing to further comprise retardation plate and one second time retardation plate on one second, and it is to the further compensating action of polarization state tool of light, thereby further improves light utilization.
Other numerous variations embodiment of tool of the present invention, in the 3rd embodiment, the position of retardation plate is interchangeable on the position of this first compensate film 450 and this first, and correspondingly, the position of the position of this second compensate film 460 and this first time retardation plate is interchangeable.In the 4th embodiment, this retardation plate on first, this on second the position of retardation plate 550 and this first compensate film interchangeable, correspondingly, the position of this first time retardation plate, this second time retardation plate 560 and this second compensate film is interchangeable.
Claims (10)
1. semitransparent and half-reflective liquid crystal display, it comprises: one first substrate; One second substrate that is oppositely arranged with this first substrate; One liquid crystal layer is between this first substrate and this second substrate; One first polaroid is arranged at this first substrate outer surface; One second polaroid is arranged at the outer surface of this second substrate; One common electrode layer, an insulation course, a pixel electrode layer and one second both alignment layers are set in turn in the inner surface of this second substrate, and this common electrode layer comprises a penetrating region and an echo area; It is characterized in that: a control electrode layer and one first both alignment layers are set in turn in the inner surface of this first substrate, this control electrode layer is positioned at and the corresponding zone of this penetrating region, it is applied in a voltage, feasible inclination angle ratio with the corresponding liquid crystal molecule of this penetrating region is big with the inclination angle of this corresponding liquid crystal molecule in echo area, improves the birefraction with the corresponding liquid crystal molecule of this penetrating region.
2. semitransparent and half-reflective liquid crystal display as claimed in claim 1 is characterized in that: this pixel electrode layer comprises a plurality of pixel electrodes, and it is shaped as strip, bending shape or waveform.
3. semitransparent and half-reflective liquid crystal display as claimed in claim 2 is characterized in that: the width of this pixel electrode is 1 μ m-15 μ m.
4. semitransparent and half-reflective liquid crystal display as claimed in claim 2 is characterized in that: the distance between these adjacent two pixel electrodes is 1 μ m-15 μ m.
5. semitransparent and half-reflective liquid crystal display as claimed in claim 2 is characterized in that: this control electrode layer comprises a plurality of control electrodes, and it is shaped as and the corresponding strip of this pixel electrode, bending shape or waveform.
6. semitransparent and half-reflective liquid crystal display as claimed in claim 5 is characterized in that: the width of this control electrode is 1 μ m-15 μ m.
7. semitransparent and half-reflective liquid crystal display as claimed in claim 5 is characterized in that: the distance between these adjacent two control electrodes is 1 μ m-15 μ m.
8. semitransparent and half-reflective liquid crystal display as claimed in claim 5 is characterized in that: this control electrode is relative with this pixel electrode to be staggered.
9. semitransparent and half-reflective liquid crystal display as claimed in claim 1, it is characterized in that: this semitransparent and half-reflective liquid crystal display further comprises retardation plate and one first time retardation plate on one first, retardation plate is between this first substrate and this first polaroid on first for this, and this first time retardation plate is between this second substrate and this second polaroid.
10. semitransparent and half-reflective liquid crystal display as claimed in claim 9, it is characterized in that: this semitransparent and half-reflective liquid crystal display further comprises one first compensate film and one second compensate film, this first compensate film is on this first polaroid and this first between the retardation plate, and this second compensate film is between this second polaroid and this first time retardation plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100773423A CN101393335B (en) | 2007-09-21 | 2007-09-21 | Half- penetration and half-reflection LCD |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100773423A CN101393335B (en) | 2007-09-21 | 2007-09-21 | Half- penetration and half-reflection LCD |
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| CN101393335A true CN101393335A (en) | 2009-03-25 |
| CN101393335B CN101393335B (en) | 2011-09-28 |
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| CN2007100773423A Expired - Fee Related CN101393335B (en) | 2007-09-21 | 2007-09-21 | Half- penetration and half-reflection LCD |
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| CN102629034A (en) * | 2011-07-21 | 2012-08-08 | 京东方科技集团股份有限公司 | Semi-transmitting half-reflection liquid crystal display and manufacturing method thereof |
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| US7339641B2 (en) * | 2005-04-20 | 2008-03-04 | Research Foundation Of The University Of Central Florida | Transflective liquid crystal display with fringing and longitudinal electric field |
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