CN202256966U - Polarizing light adjustment device - Google Patents
Polarizing light adjustment device Download PDFInfo
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- CN202256966U CN202256966U CN2011202515786U CN201120251578U CN202256966U CN 202256966 U CN202256966 U CN 202256966U CN 2011202515786 U CN2011202515786 U CN 2011202515786U CN 201120251578 U CN201120251578 U CN 201120251578U CN 202256966 U CN202256966 U CN 202256966U
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- position angle
- modulating device
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Abstract
The utility model provides a polarizing light adjustment device. The polarizing light adjustment device comprises an upper polarizer and a lower polarizer, wherein the transmission axis of the upper polarizer is orthogonal to the transmission axis of the lower polarizer. The polarizing light adjustment device also comprises an A wave-plate and a C wave-plate which are arranged between the upper polarizer and the lower polarizer so as to reduce light leakage at the strabismus direction. The device of the utility model can reduce light leakage of orthogonal polarizers when displaying in dark state, and widen view angles of a display device.
Description
Technical field
The utility model relates to the light regulating technology field, is specifically related to a kind of polarisation light modulating device.
Background technology
Two mutually orthogonal polaroids commonly used are realized the dark attitude that shows in the polarisation light modulating device.Can know that according to geometrical optics through after following polaroid and the polaroid, on the view directions perpendicular to polaroid, seeing through of polarisation of light direction and last polaroid is spool vertical, so light leakage phenomena can not take place successively for light.But on other view directions, the axle that sees through of polarisation of light direction and last polaroid is not a strict vertical relation, therefore will have the part beam projecting, the generation of light leakage phenomena when causing dark attitude.And above-mentioned light leakage phenomena is along with the visual angle increases also serious further.
Can find out, in the polarisation light modulating device of said structure, owing to have light leakage phenomena under the dark attitude, thus limited the angular field of view of display device.
The utility model content
The utility model technical matters to be solved provides a kind of polarisation light modulating device, reduces the light leak of orthogonal polarizers when showing dark attitude, increases the visual angle of display device.
For solving the problems of the technologies described above, the utility model provides scheme following:
A kind of polarisation light modulating device comprises polaroid and following polaroid, and said light transmission shaft and the said light transmission shaft quadrature of polaroid down of going up polaroid also comprises:
Be arranged on said A wave plate and the C wave plate of going up between polaroid and the following polaroid, being used to reduce stravismus direction light leak.
Preferably, in the above-mentioned polarisation light modulating device,
Said A wave plate and saidly go up polaroid or polaroid is adjacent down, and the position angle that sees through axle of the position angle of the slow axis of said A wave plate and the polaroid adjacent with said A wave plate is identical.
Preferably, in the above-mentioned polarisation light modulating device,
Said A wave plate is adjacent with said last polaroid, and said C wave plate is arranged on the below of said A wave plate;
The position angle of the slow axis of said A wave plate is identical with the position angle that sees through axle of said upward polaroid.
Preferably, in the above-mentioned polarisation light modulating device,
Said A wave plate is adjacent with said following polaroid, and said C wave plate is arranged on the top of said A wave plate;
The position angle of the slow axis of said A wave plate is identical with the position angle that sees through axle of said polaroid down.
Preferably, in the above-mentioned polarisation light modulating device,
The optical path difference of said A wave plate is between 110nm～170nm, and the optical path difference of said C wave plate is between 70nm～110nm.
Preferably, in the above-mentioned polarisation light modulating device, also comprise liquid crystal layer, this liquid crystal layer can be arranged in said upward polaroid, A wave plate, C wave plate and the following polaroid between the two adjacent arbitrarily.
Preferably, in the above-mentioned polarisation light modulating device,
Said A wave plate comprises an A wave plate and the 2nd A wave plate; Said C wave plate comprises a C wave plate and the 2nd C wave plate; And, between said polaroid down and last polaroid, set gradually said the 2nd A wave plate, the 2nd C wave plate, a C wave plate and an A wave plate according to order from top to bottom;
Wherein, the position angle of the slow axis of a said A wave plate is identical with the said position angle that sees through axle of going up polaroid, and a position angle that sees through spool of the position angle of the slow axis of said the 2nd A wave plate and said polaroid down is identical.
Preferably, in the above-mentioned polarisation light modulating device,
All between 30nm～80nm, the optical path difference of a said C wave plate and the 2nd C wave plate is all between 30nm～70nm for the optical path difference of a said A wave plate and the 2nd A wave plate.
Preferably, in the above-mentioned polarisation light modulating device, also comprise liquid crystal layer, this liquid crystal layer can be arranged in said upward polaroid, an A wave plate and the 2nd A wave plate, a C wave plate and the 2nd C wave plate and the following polaroid between the two adjacent arbitrarily.
Can find out that from the above the polarisation light modulating device that the utility model provides reduces dark attitude light leak through two-layer uniaxial crystal film (A+C wave plate), can reduce the dark attitude light leak of various mode display, has enlarged the visual angle and the contrast of display.
Description of drawings
Fig. 1 is the structural representation of the described polarisation light modulating device of the utility model embodiment;
Fig. 2 is the structural representation of the described polarisation light modulating device of another embodiment of the utility model;
Fig. 3 is for including first structural representation of the polarisation light modulating device of liquid crystal layer among the utility model embodiment;
Fig. 4 is for including second structural representation of the polarisation light modulating device of liquid crystal layer among the utility model embodiment;
Fig. 5 is for including the 3rd structural representation of the polarisation light modulating device of liquid crystal layer among the utility model embodiment;
Fig. 6 is for including the 4th structural representation of the polarisation light modulating device of liquid crystal layer among the utility model embodiment;
Fig. 7 is for including the 5th structural representation of the polarisation light modulating device of liquid crystal layer among the utility model embodiment;
Fig. 8 is for including the 6th structural representation of the polarisation light modulating device of liquid crystal layer among the utility model embodiment;
Fig. 9 is the structural representation of the described polarisation light modulating device of the another embodiment of the utility model;
Figure 10 is for including the 7th structural representation of the polarisation light modulating device of liquid crystal layer among the utility model embodiment.
Embodiment
The utility model provides a kind of polarisation light modulating device, and this polarisation light modulating device comprises polaroid and following polaroid, wherein, and said light transmission shaft and the said light transmission shaft quadrature of polaroid down of going up polaroid.The utility model further is provided for reducing the A wave plate and the C wave plate of stravismus direction light leak on said between polaroid and the following polaroid; Said A wave plate and said upward polaroid or following polaroid are adjacent; And the position angle that sees through axle of the position angle of said A wave plate and the polaroid adjacent with said A wave plate is identical; Thereby can reduce or eliminate the light leakage phenomena under the dark attitude, increase the visual angle.Here, C wave plate and A wave plate all are the uniaxial crystal films.
Below will combine accompanying drawing, the utility model will be further described through specific embodiment.
Please with reference to Fig. 1, the utility model embodiment provides the polarisation light modulating device, comprises polaroid 11, C wave plate 13, A wave plate 14 and last polaroid 12 down successively according to from top to bottom order.
Among Fig. 1, said light transmission shaft and the said light transmission shaft quadrature of polaroid 11 down of going up polaroid 12, said A wave plate 14 is arranged on the top of said C wave plate 13.Preferably; The position angle of said A wave plate 14 is identical with the position angle of the last polaroid 12 that is adjacent; For example when the position angle of last polaroid 12 be 90 when spending, the position angle of A wave plate 14 also is 90 degree, with avoid perpendicular on the angle of polaroid 12 optical axis deflect.Here, the position angle of A wave plate can be the position angle of slow axis, and the position angle of upper and lower polaroid can characterize with the position angle that sees through axle separately.
In the present embodiment, the optical path difference of said A wave plate 14 (retarder) is preferably 140nm between 110nm～170nm.The optical path difference of said C wave plate 13 is preferably 90nm between 70nm～110nm.Under above-mentioned parameter limits, can reduce the light leakage phenomena on the stravismus direction well.
Can find out from the above; Present embodiment has increased two-layer uniaxial crystal film between mutually orthogonal polaroid, light is from polaroid 11 incidents down, after passing through C wave plate 13 and A wave plate 14 successively like this; Spool vertical seeing through of the polarization direction of stravismus direction glazed thread and last polaroid 12; Promptly consistent with the absorption axes of last polaroid 12, thus reduce or avoided the generation of the light leakage phenomena on the dark attitude catotropia direction, improved angular field of view.
Again please with reference to Fig. 2, the polarisation light modulating device that another embodiment of the utility model provides comprises polaroid 21, A wave plate 24, C wave plate 23 and last polaroid 22 down successively according to from top to bottom order.
Among Fig. 2, said light transmission shaft and the said light transmission shaft quadrature of polaroid 21 down of going up polaroid 22, said A wave plate 24 is arranged on the below of said C wave plate 23.Preferably; The position angle of said A wave plate 24 is identical with the position angle of the following polaroid 21 that is adjacent; For example the position angle of polaroid 21 is 0 when spending instantly, and the position angle of A wave plate 24 also is 0 degree, and optical axis deflects on perpendicular to the angle of polaroid 21 down to avoid.Here, the position angle of A wave plate and upper and lower polaroid can characterize with the position angle that sees through axle separately.
Similarly, the optical path difference of said A wave plate 24 (retarder) is preferably 140nm between 110nm～170nm.The optical path difference of said C wave plate 23 is preferably 90nm between 70nm～110nm.Under above-mentioned parameter limits, can reduce the light leakage phenomena on the stravismus direction well.
Can find out from the above; Present embodiment has increased two-layer uniaxial crystal film between mutually orthogonal polaroid, light is from polaroid 21 incidents down, after passing through A wave plate 24 and C wave plate 23 successively like this; Spool vertical seeing through of the polarization direction of stravismus direction glazed thread and last polaroid 22; Promptly consistent with the absorption axes of last polaroid 22, thus reduce or avoided the generation of the light leakage phenomena on the dark attitude catotropia direction, improved angular field of view.
In above two kinds of embodiment, between last polaroid and following polaroid, can also increase liquid crystal layer, this liquid crystal layer can be arranged in said upward polaroid, A wave plate, C wave plate and the following polaroid between the two adjacent arbitrarily.For example, in Fig. 1, increase liquid crystal layer 15, obtain the structure shown in Fig. 3～5.Similarly, in Fig. 2, increase liquid crystal layer 25, can obtain the structure shown in Fig. 6～8.Like this, present embodiment can utilize above-mentioned two-layer uniaxial crystal film reducing the dark attitude light leak of orthogonal polarizers on the stravismus direction, can also reduce because the caused dark attitude light leak of liquid crystal anisotropy simultaneously.
Please with reference to Fig. 9; The polarisation light modulating device that the another embodiment of the utility model provides; Include two A wave plates and two C wave plates in this device, be followed successively by: following polaroid 31, the 2nd A wave plate 33, the 2nd C wave plate 34, a C wave plate 35, an A wave plate 36 and last polaroid 32 according to from top to bottom order.
Wherein, the position angle of the 2nd A wave plate 33 and adjacent following polaroid 31 is identical, and the position angle of an A wave plate 33 and adjacent last polaroid 32 is identical.
Preferably, all between 30nm～80nm, the optical path difference of a said C wave plate 35 and the 2nd C wave plate 34 all between 30nm～70nm, can reach better viewing angle compensation effect to the optical path difference of a said A wave plate 36 and the 2nd A wave plate 33.
Same, in structure shown in Figure 9, also can increase liquid crystal layer, this liquid crystal layer can be arranged in said upward polaroid, A wave plate, C wave plate and the following polaroid between the two adjacent arbitrarily.Preferably, can be shown in figure 10, liquid crystal layer 37 is arranged between a said C wave plate 35 and the 2nd C wave plate 34.
Can find out from the above; Polarisation light modulating device and display device that the utility model embodiment provides; Reduce dark attitude light leak through two-layer uniaxial crystal film (A+C wave plate), can reduce the dark attitude light leak of various mode display, enlarge the visual angle and the contrast of display.
The above only is the embodiment of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (9)
1. a polarisation light modulating device comprises polaroid and following polaroid, and said light transmission shaft and the said light transmission shaft quadrature of polaroid down of going up polaroid is characterized in that, also comprises:
Be arranged on said A wave plate and the C wave plate of going up between polaroid and the following polaroid, being used to reduce stravismus direction light leak.
2. polarisation light modulating device as claimed in claim 1 is characterized in that,
Said A wave plate and saidly go up polaroid or polaroid is adjacent down, and the position angle that sees through axle of the position angle of the slow axis of said A wave plate and the polaroid adjacent with said A wave plate is identical.
3. polarisation light modulating device as claimed in claim 1 is characterized in that,
Said A wave plate is adjacent with said last polaroid, and said C wave plate is arranged on the below of said A wave plate;
The position angle of the slow axis of said A wave plate is identical with the position angle that sees through axle of said upward polaroid.
4. polarisation light modulating device as claimed in claim 1 is characterized in that,
Said A wave plate is adjacent with said following polaroid, and said C wave plate is arranged on the top of said A wave plate;
The position angle of the slow axis of said A wave plate is identical with the position angle that sees through axle of said polaroid down.
5. like claim 3 or 4 described polarisation light modulating devices, it is characterized in that,
The optical path difference of said A wave plate is between 110nm～170nm, and the optical path difference of said C wave plate is between 70nm～110nm.
6. polarisation light modulating device as claimed in claim 1 is characterized in that, also comprises liquid crystal layer, and this liquid crystal layer is arranged in said upward polaroid, A wave plate, C wave plate and the following polaroid between the two adjacent arbitrarily.
7. polarisation light modulating device as claimed in claim 1 is characterized in that,
Said A wave plate comprises an A wave plate and the 2nd A wave plate; Said C wave plate comprises a C wave plate and the 2nd C wave plate; And, between said polaroid down and last polaroid, set gradually said the 2nd A wave plate, the 2nd C wave plate, a C wave plate and an A wave plate according to order from top to bottom;
Wherein, the position angle of the slow axis of a said A wave plate is identical with the said position angle that sees through axle of going up polaroid, and a position angle that sees through spool of the position angle of the slow axis of said the 2nd A wave plate and said polaroid down is identical.
8. polarisation light modulating device as claimed in claim 7 is characterized in that,
All between 30nm～80nm, the optical path difference of a said C wave plate and the 2nd C wave plate is all between 30nm～70nm for the optical path difference of a said A wave plate and the 2nd A wave plate.
9. polarisation light modulating device as claimed in claim 7 is characterized in that, also comprises liquid crystal layer, and this liquid crystal layer is arranged in said upward polaroid, an A wave plate and the 2nd A wave plate, a C wave plate and the 2nd C wave plate and the following polaroid between the two adjacent arbitrarily.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202515786U CN202256966U (en) | 2011-07-15 | 2011-07-15 | Polarizing light adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202515786U CN202256966U (en) | 2011-07-15 | 2011-07-15 | Polarizing light adjustment device |
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| Publication Number | Publication Date |
|---|---|
| CN202256966U true CN202256966U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202515786U Expired - Lifetime CN202256966U (en) | 2011-07-15 | 2011-07-15 | Polarizing light adjustment device |
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| CN (1) | CN202256966U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854661A (en) * | 2012-10-10 | 2013-01-02 | 深圳市华星光电技术有限公司 | VA display mode compensating framework and VA display mode liquid crystal display device |
| WO2022121344A1 (en) * | 2020-12-10 | 2022-06-16 | 深圳惠牛科技有限公司 | Display device and head-mounted display |
-
2011
- 2011-07-15 CN CN2011202515786U patent/CN202256966U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854661A (en) * | 2012-10-10 | 2013-01-02 | 深圳市华星光电技术有限公司 | VA display mode compensating framework and VA display mode liquid crystal display device |
| WO2014056245A1 (en) * | 2012-10-10 | 2014-04-17 | 深圳市华星光电技术有限公司 | Va display mode compensation structure and va display-mode liquid crystal display device |
| CN102854661B (en) * | 2012-10-10 | 2015-06-03 | 深圳市华星光电技术有限公司 | VA display mode compensating framework and VA display mode liquid crystal display device |
| WO2022121344A1 (en) * | 2020-12-10 | 2022-06-16 | 深圳惠牛科技有限公司 | Display device and head-mounted display |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
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| CX01 | Expiry of patent term |