CN100468143C - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN100468143C CN100468143C CNB2005101008177A CN200510100817A CN100468143C CN 100468143 C CN100468143 C CN 100468143C CN B2005101008177 A CNB2005101008177 A CN B2005101008177A CN 200510100817 A CN200510100817 A CN 200510100817A CN 100468143 C CN100468143 C CN 100468143C
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Abstract
A liquid crystal display is setting the second substrate opposite to the first one, and setting liquid crystal layer between two said substrates, arranging the first polarized light plate on external surface of the first substrate and the second one on external surface of the second substrate, setting the first quarter wave plate between the first polarized light plate and the first substrate and the second one between the second polarized light plate and the second substrate, setting a dished molecular film between the first quarter wave plate and the first substrate.
Description
[technical field]
The present invention relates to a kind of liquid crystal indicator.
[background technology]
Because the liquid crystal in the liquid crystal indicator itself does not possess the characteristics of luminescence, provide light source with display image so be required to be it.According to the difference of light source that liquid crystal indicator utilizes, it can be divided into reflective LCD device and penetration liquid crystal display device.Yet reflective LCD device is difficult under low light environment realize that image shows, makes its range of application limited, so penetration liquid crystal display device becomes main flow gradually.
A kind of liquid crystal indicator of prior art as shown in Figure 1, this liquid crystal indicator 100 comprises liquid crystal panel 102 and module backlight 104.This liquid crystal panel 102 and module backlight 104 stacked settings, this module 104 backlight provides planar light for this liquid crystal panel 102.
This liquid crystal panel 102 comprises first substrate 110, liquid crystal layer 120 and second substrate 130, and these two substrates 110,130 are oppositely arranged, and this liquid crystal layer 120 is between these two substrates 110,130.This liquid crystal layer 120 is that twisted-nematic (Twist Nematic, TN) form by the type liquid crystal.
This first substrate 110 comprises first polaroid 111, first quarter-wave plate 113, first substrate 115, public electrode 117 and first alignment film 119; By the outside to this liquid crystal layer 120 be cascading this first polaroid 111, first quarter-wave plate 113, first substrate 115, public electrode 117 and first alignment film 119.
This second substrate 130 comprises second polaroid 131, second quarter-wave plate 133, second substrate 135, pixel electrode 137 and second alignment film 139; By the outside to this liquid crystal layer 120 be cascading this second polaroid 131, second quarter-wave plate 133, second substrate 135, pixel electrode 137 and second alignment film 139.
The slow axis of this first quarter-wave plate 113 is vertical mutually with the slow axis of this second quarter-wave plate 133, the polarizing axis of this first polaroid 111 is vertical mutually with the polarizing axis of this second polaroid 131, the slow axis of this first quarter-wave plate 113 becomes miter angle with the polarizing axis of this first polaroid 111, and the slow axis of this second quarter-wave plate 133 becomes miter angle with the polarizing axis of this second polaroid 131.When the polarization direction becomes the line polarisation incident quarter-wave plate of miter angle with the slow axis of quarter-wave plate, will transfer rotatory polarization to after seeing through.When the polarization direction becomes the line polarisation incident quarter-wave plate of non-miter angle with the slow axis of quarter-wave plate, will transfer elliptical polarized light to after seeing through.When rotatory polarization incident quarter-wave plate, will transfer the polarization direction becomes miter angle with the slow axis of quarter-wave plate line polarisation after seeing through to.When elliptical polarized light incident quarter-wave plate, will transfer the polarization direction becomes non-miter angle with the slow axis of quarter-wave plate line polarisation after seeing through to.
See also Fig. 2, be the Liquid Crystal Molecules Alignment synoptic diagram of these liquid crystal indicator 100 bright attitudes with dark attitude.When not applying voltage, the rotation of liquid crystal molecule along continuous straight runs is arranged, and when light passes through this liquid crystal layer 120, the polarization direction of light will rotate along with the rotation of liquid crystal molecule, and this moment, this liquid crystal indicator 100 was bright attitude.When applying voltage, liquid crystal molecule is arranged perpendicular to the direction of substrate in the effect lower edge of public electrode 117 and pixel electrode 137, and light will directly not change the polarization direction by this liquid crystal layer 120, so this liquid crystal indicator 100 is dark attitude.Can realize that by the voltage that applies different value different GTGs shows.
Yet, when applying voltage, owing to have grasp energy (Anchoring Energy) between alignment film 119,139 and near the liquid crystal molecule that is positioned at it, near the alignment film 119,139 liquid crystal molecule can not be arranged along the direction perpendicular to substrate 110,130 fully, at this moment, when this liquid crystal layer 120 of light process, the light delay amount of all directions is inequality, make this liquid crystal layer 120 also different in the brightness of different directions, thereby cause the contrast of this liquid crystal indicator 100 to reduce, and the visual angle of this liquid crystal indicator 100 also diminish.
[summary of the invention]
In order to solve lower, the visual angle problem of smaller of liquid crystal indicator contrast in the prior art, be necessary to provide the liquid crystal indicator that a kind of contrast is higher, the visual angle is wider.
A kind of liquid crystal indicator comprises one first substrate; One second substrate is oppositely arranged with this first substrate; One liquid crystal layer, this liquid crystal layer is between these two substrates; One first polaroid, this first polaroid is arranged on the outside surface of this first substrate; One second polaroid, this second polaroid is arranged on the outside surface of this second substrate; One first quarter-wave plate, this first quarter-wave plate are arranged between this first polaroid and this first substrate; One second quarter-wave plate, this second quarter-wave plate are arranged between this second polaroid and this second substrate; A dishful of shape molecular film, this dish shape molecular film are arranged between this first quarter-wave plate and this first substrate; One first alignment film and one second alignment film, this first alignment film is arranged between this first substrate and this liquid crystal layer, this second alignment film is arranged between this second substrate and this liquid crystal layer, and the molecules align direction of this dish shape molecular film is the angular bisector direction of the alignment direction angle of the alignment direction of this first alignment film and this second alignment film.
Compared to prior art, this liquid crystal indicator compensates the light delay amount difference of this liquid crystal layer by this dish shape molecular film, and this dish shape molecular film can dwindle the difference of all directions light delay amount, thereby makes that this contrast of LCD degree is higher, the visual angle is wider.
[description of drawings]
Fig. 1 is the synoptic diagram of a kind of liquid crystal indicator in the prior art.
Fig. 2 is the liquid crystal layer principle of work synoptic diagram of liquid crystal indicator shown in Figure 1.
Fig. 3 is the synoptic diagram of liquid crystal indicator first embodiment of the present invention.
Fig. 4 is the synoptic diagram of liquid crystal indicator second embodiment of the present invention.
Fig. 5 is the synoptic diagram of liquid crystal indicator the 3rd embodiment of the present invention.
[embodiment]
Liquid crystal indicator first embodiment of the present invention as shown in Figure 3, this liquid crystal indicator 200 comprises draws together liquid crystal panel 202 and module backlight 204.This liquid crystal panel 202 and module backlight 204 stacked settings, this module 204 backlight provides planar light for this liquid crystal panel 202.
This liquid crystal panel 202 comprises first substrate 210, liquid crystal layer 220 and second substrate 230, and these two substrates 210 and 230 are oppositely arranged, and this liquid crystal layer 220 is between these two substrates 210 and 230.
This first substrate 210 comprises first polaroid 211, first quarter-wave plate 213, the first dish shape molecular film (Discotic Molecular Film), 214, first substrate 215, public electrode 217 and first alignment film 219; By the outside to this liquid crystal layer 220 be cascading this first polaroid 211, first quarter-wave plate 213, the first dish shape molecular film 214, first substrate 215, public electrode 217 and first alignment film 219.
This second substrate 230 comprises second polaroid 231, second quarter-wave plate 233, the second dish shape molecular film 234, second substrate 235, pixel electrode 237 and second alignment film 239; By the outside to this liquid crystal layer 220 be cascading this second polaroid 231, second quarter-wave plate 233, the second dish shape molecular film 234, second substrate 235, pixel electrode 237 and second alignment film 239.
This liquid crystal layer 220 is formed for twisted nematic liquid crystals.This first alignment film 219 and second alignment film 239 are horizontal direction matching, the tilt angle of these two alignment films 219,239 (Pretilt Angle) be 0 the degree to 15 the degree, the alignment direction of this second alignment film 239 becomes 0 to spend to an angle of 90 degrees with the alignment direction of this first alignment film 219.This public electrode 217 and pixel electrode 237 are transparent conductive material, as tin indium oxide or indium zinc oxide.This first substrate 215 and second substrate 235 are transparent material, as glass or quartz.
The slow axis of this first quarter-wave plate 213 is vertical mutually with the slow axis of this second quarter-wave plate 233, the polarizing axis of this first polaroid 211 is vertical mutually with the polarizing axis of this second polaroid 231, the slow axis of this first quarter-wave plate 213 becomes miter angle with the polarizing axis of this first polaroid 211, and the slow axis of this second quarter-wave plate 233 becomes miter angle with the polarizing axis of this second polaroid 231.
This first dish shape molecular film 214 and the second dish shape molecular film 234 are mixed type (Hybird) structure.The molecules align direction of this first dish shape molecular film 214 is parallel to the alignment direction of this first alignment film 219.The molecules align direction of this second dish shape molecular film 234 is parallel to the alignment direction of this second alignment film 239.The molecule tilt angle of this first dish shape molecular film 214 contiguous these first substrate, 215 1 sides be 0 degree to 45 degree, the molecule tilt angle of these first dish shape molecular film, 214 contiguous these first quarter-wave plate, 213 1 sides is that 45 degree are to 90 degree.The molecule tilt angle of this second dish shape molecular film 234 contiguous these second substrate, 235 1 sides be 0 degree to 45 degree, the molecule tilt angle of these second dish shape molecular film, 234 contiguous these second quarter-wave plate, 233 1 sides is that 45 degree are to 90 degree.
Compared to prior art, this liquid crystal indicator 200 by 214,234 compensation of this dish shape molecular film since near the liquid crystal molecule the alignment film 219,239 can not be fully make these liquid crystal layer 220 all directions light delay amount differences along direction arrangement perpendicular to substrate 215,235, this dish shape molecular film 214,234 can dwindle the difference of all directions light delay amount, thereby makes the contrast of this liquid crystal indicator 200 higher, the visual angle is wider.
Liquid crystal indicator second embodiment of the present invention as shown in Figure 4, this liquid crystal indicator 300 comprises liquid crystal panel 302 and module backlight 304.This liquid crystal panel 302 and module backlight 304 stacked settings, this module 304 backlight provides planar light for this liquid crystal panel 302.
This liquid crystal panel 302 comprises first substrate 310, liquid crystal layer 320 and second substrate 330, and these two substrates 310,330 are oppositely arranged, and this liquid crystal layer 320 is between these two substrates 310,330.
This first substrate 310 comprises first polaroid 311, first quarter-wave plate 313, dish shape molecular film 314, first substrate 315, public electrode 317 and first alignment film 319; By the outside to this liquid crystal layer 320 be cascading this first polaroid 311, first quarter-wave plate 313, dish shape molecular film 314, first substrate 315, public electrode 317 and first alignment film 319.
This second substrate 330 comprises second polaroid 331, second quarter-wave plate 333, second substrate 335, pixel electrode 337 and second alignment film 339; By the outside to this liquid crystal layer 320 be cascading this second polaroid 331, second quarter-wave plate 333, second substrate 335, pixel electrode 337 and second alignment film 339.
This liquid crystal layer 320 is formed for twisted nematic liquid crystals.This first alignment film 319 and second alignment film 339 are horizontal direction matching, the tilt angle of these two alignment films 319,339 be 0 the degree to 15 the degree, the alignment direction of this second alignment film 339 becomes 0 to spend to an angle of 90 degrees with the alignment direction of this first alignment film 319.This public electrode 317 is a transparent conductive material with pixel electrode 337, as tin indium oxide or indium zinc oxide.This first substrate 315 and second substrate 335 are transparent material, as glass or quartz.
The slow axis of this first quarter-wave plate 313 is vertical mutually with the slow axis of this second quarter-wave plate 333, the polarizing axis of this first polaroid 311 is vertical mutually with the polarizing axis of this second polaroid 331, the slow axis of this first quarter-wave plate 313 becomes miter angle with the polarizing axis of this first polaroid 311, and the slow axis of this second quarter-wave plate 333 becomes miter angle with the polarizing axis of this second polaroid 331.
This dish shape molecular film 314 is a hybrid architecture.The molecules align direction of this dish shape molecular film 314 is parallel to the angular bisector direction of this first alignment film 319 and second alignment film, 339 alignment direction angles.The molecule tilt angle of this dish shape molecular film 314 contiguous these first substrate, 315 1 sides be 0 degree to 45 degree, the molecule tilt angle of these dish shape molecular film 314 contiguous these first quarter-wave plate, 313 1 sides is that 45 degree are to 90 degree.
Compared to prior art, this liquid crystal indicator 300 compensates by this dish shape molecular film 314 because near the liquid crystal molecules the alignment film 319,339 can not make that along arranging perpendicular to the direction of substrate 315,335 these liquid crystal layer 320 all directions light delay amounts are inequality fully, this dish shape molecular film 314 can dwindle the difference of all directions light delay amount, thereby makes the contrast of this liquid crystal indicator 300 higher, the visual angle is wider.
The 3rd embodiment of liquid crystal indicator of the present invention as shown in Figure 5, the present embodiment and the second embodiment difference are: the dish shape molecular film 434 of this liquid crystal indicator 400 is arranged between this second quarter-wave plate 433 and this second substrate 435.The molecules align direction of this dish shape molecular film 434 is parallel to the angular bisector direction of this first alignment film 419 and second alignment film, 439 alignment direction angles.
The molecule tilt angle of this dish shape molecular film 434 contiguous these second substrate, 435 1 sides be 0 degree to 45 degree, the molecule tilt angle of these second dish shape molecular film, 434 contiguous these second quarter-wave plate, 433 1 sides is that 45 degree are to 90 degree.
Claims (9)
1. liquid crystal indicator, it comprises:
One first substrate;
One second substrate is oppositely arranged with this first substrate;
One liquid crystal layer is between this first substrate and second substrate;
One first polaroid, this first polaroid is arranged on the outside surface of this first substrate;
One second polaroid, this second polaroid is arranged on the outside surface of this second substrate;
One first quarter-wave plate, this first quarter-wave plate are arranged between this first polaroid and this first substrate;
One second quarter-wave plate, this second quarter-wave plate are arranged between this second polaroid and this second substrate;
A dishful of shape molecular film, this dish shape molecular film are arranged between this first quarter-wave plate and this first substrate;
One first alignment film and one second alignment film, this first alignment film is arranged between this first substrate and this liquid crystal layer, this second alignment film is arranged between this second substrate and this liquid crystal layer, and the molecules align direction of this dish shape molecular film is the angular bisector direction of the alignment direction angle of the alignment direction of this first alignment film and this second alignment film.
2. liquid crystal indicator as claimed in claim 1 is characterized in that: these two alignment films are horizontal direction matching, the tilt angle of these two alignment films be 0 the degree to 15 the degree, the alignment direction of this second alignment film becomes 0 to spend to an angle of 90 degrees with the alignment direction of this first alignment film.
3. liquid crystal indicator as claimed in claim 2, it is characterized in that: the molecule tilt angle of contiguous this first substrate, one side of this dish shape molecular film be 0 degree to 45 degree, the molecule tilt angle of contiguous this first quarter-wave plate, one side of this dish shape molecular film is that 45 degree are to 90 degree.
4. liquid crystal indicator as claimed in claim 1 is characterized in that: this liquid crystal indicator further comprises another dish shape molecular film, and this another dish shape molecular film is arranged between this second quarter-wave plate and this second substrate.
5. liquid crystal indicator as claimed in claim 4 is characterized in that: this liquid crystal indicator further comprises one first alignment film and one second alignment film; This first alignment film is arranged between this first substrate and this liquid crystal layer, and this second alignment film is arranged between this second substrate and this liquid crystal layer.
6. liquid crystal indicator as claimed in claim 5 is characterized in that: these two alignment films are horizontal direction matching, the tilt angle of these two alignment films be 0 the degree to 15 the degree, the alignment direction of this second alignment film becomes 0 to spend to an angle of 90 degrees with the alignment direction of this first alignment film.
7. liquid crystal indicator as claimed in claim 6 is characterized in that: the molecules align direction of the dish shape molecular film of contiguous this first substrate is parallel to the alignment direction of this first alignment film; The molecules align direction of the dish shape molecular film of contiguous this second substrate is parallel to the alignment direction of this second alignment film; The molecule tilt angle of contiguous this first substrate, one side of the dish shape molecular film of this first substrate of this vicinity be 0 degree to 45 degree, the molecule tilt angle of contiguous this first quarter-wave plate, one side is that 45 degree are to 90 degree; The molecule tilt angle of contiguous this second substrate, one side of the dish shape molecular film of this second substrate of this vicinity be 0 degree to 45 degree, the molecule tilt angle of contiguous this second quarter-wave plate, one side is that 45 degree are to 90 degree.
8. as claim 1 or 4 described liquid crystal indicators, it is characterized in that: the polarizing axis of this first polaroid is vertical mutually with the polarizing axis of this second polaroid.
9. as claim 1 or 4 described liquid crystal indicators, it is characterized in that: the slow axis of this first quarter-wave plate is vertical mutually with the slow axis of this second quarter-wave plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101008177A CN100468143C (en) | 2005-10-28 | 2005-10-28 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101008177A CN100468143C (en) | 2005-10-28 | 2005-10-28 | Liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1955798A CN1955798A (en) | 2007-05-02 |
| CN100468143C true CN100468143C (en) | 2009-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101008177A Expired - Fee Related CN100468143C (en) | 2005-10-28 | 2005-10-28 | Liquid crystal display device |
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| Country | Link |
|---|---|
| CN (1) | CN100468143C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI630527B (en) * | 2017-09-21 | 2018-07-21 | 友達光電股份有限公司 | Display panel |
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2005
- 2005-10-28 CN CNB2005101008177A patent/CN100468143C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1955798A (en) | 2007-05-02 |
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Granted publication date: 20090311 Termination date: 20201028 |
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| CF01 | Termination of patent right due to non-payment of annual fee |