CN101363990B - Polarizing diaphragm and display apparatus using the same - Google Patents
Polarizing diaphragm and display apparatus using the same Download PDFInfo
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- CN101363990B CN101363990B CN 200710141124 CN200710141124A CN101363990B CN 101363990 B CN101363990 B CN 101363990B CN 200710141124 CN200710141124 CN 200710141124 CN 200710141124 A CN200710141124 A CN 200710141124A CN 101363990 B CN101363990 B CN 101363990B
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Abstract
The invention discloses a polarization membrane and a display device using the polarization membrane. On the polarization membrane, a plurality of microstructures are utilized, so as to enable incident rays on the polarization membrane to improve the ray utilization ratio through the angle design of the microstructures, wherein the polarization membrane is provided with a body; a plurality of first microstructures and a plurality of second microstructures are respectively arranged on the upper and the lower surfaces of the body; the incident rays on the polarization membrane in the first microstructures are subjected to refraction, then reflection, and incidence at the Brewster angle into the second microstructures, thereby enabling the direct emergence of partial rays from the second microstructures; and at the same time, partial rays reutilize the second microstructures to return to a backlight module in a total reflection manner, thereby improving the ray utilization ratio.
Description
Technical field
The present invention relates to a kind of optical module and use its display device, relate in particular to a kind of polarizing diaphragm and use its display device.
Background technology
One of target that the light utilization ratio of backlight module is made great efforts for the liquid crystal display industry, wherein, the position that brightness enhancement film is arranged at the last outgoing of light of backlight module in order to the wherein a kind of common technique that promotes the light utilization ratio at present, so that light can again improve the utilization ratio of light before entering liquid crystal cells, and the utilization ratio of raising light is except relevant with the material selection of brightness enhancement film itself, by changing the mode of brightness enhancement film surface geometry, also the light utilization ratio that promotes backlight module there is sizable help.
For example, such as Fig. 1 and shown in Figure 2, it is respectively brightness enhancement film schematic cross-section and the known brightness enhancement film schematic cross-section to following formula water chestnut mirror structure of known upper quadrant water chestnut mirror structure, at first, in the brightness enhancement film 11 of the upper quadrant water chestnut mirror structure in Fig. 1, the surface that contacts with diffusion sheet 12 is smooth, it then is the brightness enhancement film 11 of the upper quadrant water chestnut mirror structure that consisted of by the water chestnut mirror structure that a plurality of wedge angles make progress on another corresponding surface, therefore, when light (direction as shown by arrows in FIG., be the route that light is advanced) after leaving, backlight module 10 at first enters diffusion sheet 12, the incident ray that then leaves self-diffusion sheet 12 and have various angles is after having brightness enhancement film 11 outgoing of upper quadrant water chestnut mirror structure through this, the design that has special angle by the brightness enhancement film 11 that makes upper quadrant water chestnut mirror structure, adjust the refraction angle of incident ray, therefore, make light with different incidence angles degree through being adjusted to the light near the shooting angle of normal direction after the brightness enhancement film 11 of this upper quadrant water chestnut mirror structure, to enter in the liquid crystal cells (this is not shown).And in Fig. 2, disclose in the brightness enhancement film 13 of following formula water chestnut mirror structure, this upward is made of the downward water chestnut mirror structure of a plurality of wedge angles to the wherein surface in the brightness enhancement film 13 of following formula water chestnut mirror structure, another corresponding surface then is smooth, therefore, leave (the direction as shown by arrows in FIG. of the incident ray with various angles behind the backlight module 10, be the route that light is advanced) passing through this after the brightness enhancement film 13 of following formula water chestnut mirror structure, by light reflection principle, to carry out outgoing, therefore, make light with different incidence angles degree at the light that is adjusted to after the brightness enhancement film 13 of following formula water chestnut mirror structure through this close to the shooting angle of normal direction, to enter in the liquid crystal cells (this is not shown).
But, for above-mentioned two kinds of known technologies that propose, although with regard in theory, it can make the shooting angle of the light of part outgoing in brightness enhancement film be adjusted to direction near normal, but through finding after the actual checking, the utilization ratio that the structural design of this brightness enhancement film only can reach part light promotes, and can't improve significantly light utilization ratio problem on the low side.
Therefore, in at present common partial display device, adopt a kind of known structure of reflection reducting coating with two blast materials, its structure as shown in Figure 3, structure of reflection reducting coating 15 by this pair blast material can be found out, it is the multi-layer film structure that utilizes particular polymer material institute storehouse to form, wherein, this bi-material has different refractive indexes, also having respectively simultaneously can be so that the characteristic of carrying out transmission from the partial polarization attitude of the light (direction as shown by arrows in FIG. is the route that light is advanced) of backlight module 10, therefore, when light process is positioned at the first material layer 151 of ground floor, wherein, partial poolarized light with special polarization state is reflected by the first material, the partial poolarized light of all the other polarization states then enters the second material layer 152 that is positioned at the second layer, and in the second material layer 152, have the partial poolarized light of another special polarization state to be reflected by the second material, the partial poolarized light of remaining polarization state then enters and is arranged in the first material layer 151 of the 3rd layer, until light leaves till the brightness enhancement film 15 of this pair blast material, and it is wherein above-mentioned via the light after the first material and the reflection of the second material, because the polarization state of its part is destroyed, therefore, the polarized light of the polarization state of part can be when entering the brightness enhancement film 15 of this pair blast material again, transmission is crossed the brightness enhancement film 15 of this pair blast material and can not be reflected, finally, can obtain good polarized light utilization ratio, but, because the main material of the brightness enhancement film 15 of this pair blast material is special polymeric material, and the method for its formation must these are special polymeric material through the repeatedly stretching process of multiple tracks, thereby on the yield of processing procedure, so far still can't effectively improve, also cause the cost of manufacture of the brightness enhancement film 15 of this pair of blast material can't descend always.
Based on above-mentioned shortcoming, the present invention proposes a kind of polarizing diaphragm and uses its display device, to solve the problem that is met with in the known technology.
Summary of the invention
Fundamental purpose of the present invention is the display device that proposes a kind of polarizing diaphragm and use it, it utilizes the microstructure design of special angle and the principle of Brewster angle, can be behind this polarizing diaphragm of process, so that only there is the polarized light of section axial again to get back in the backlight module in the mode of total reflection so that have the incident ray of multiple polarization state.
Another object of the present invention is the display device that proposes a kind of polarizing diaphragm and use it, its microstructure design of utilizing special angle is to replace the optical thin-film structure of known multiple layers of polymeric materials institute drawing and forming, not only can reach quite desirable light utilization ratio, more reduce the cost of manufacture of assembly simultaneously.
For reaching above-mentioned purpose, the present invention at first provides a kind of polarizing diaphragm, and it is applied in the display device, and the described polarizing diaphragm of the process of the multi beam light in the described display device, and described polarizing diaphragm comprises:
Body, it has upper surface and lower surface;
A plurality of the first microstructures, it is positioned on the described lower surface of described body; And
A plurality of the second microstructures, it is positioned on the described upper surface of described body, and described multi beam light is after described a plurality of the first microstructures are left in the total reflection mode, with Brewster angle θ
BEnter in described a plurality of the second microstructure,
Wherein, suppose sandwiched the first angle theta between each first microstructure and the described body
1With the second angle theta
2, sandwiched the 3rd angle theta then between each second microstructure and the described body
3With the 4th angle theta
4, the interface angle of total reflection of described multi beam light when described a plurality of the first microstructures are left in the total reflection mode is as θ
c, the incident angle when light is incident to described the first microstructure is θ
i, n is the refractive index of described polarizing diaphragm, then has following relation:
sinθ
B＝[cos
2α/(1+n
2-2nsinα)]
1/2 (2)
α/2＝135-θ
1/2-θ
2-0.5sin
-1[sin(θ
i-θ
1)/n](3)。
Thus, then have the light of part directly to penetrate from the second microstructure, the light of part then turns back in the mode of total reflection in the second microstructure and carries out again light utilization.
Simultaneously, the present invention also proposes a kind of display device of using polarizing diaphragm simultaneously, and this display device comprises:
Backlight module, it has light source so that multi beam light to be provided;
At least one polarizing diaphragm, it is positioned at described backlight module the place ahead, and described polarizing diaphragm comprises:
Body, it has upper surface and lower surface;
A plurality of the first microstructures, it is positioned on the described lower surface of described body; And
A plurality of the second microstructures, it is positioned on the described upper surface of described body, and described multi beam light is after described a plurality of the first microstructures are left in the total reflection mode, with Brewster angle θ
BEnter in described a plurality of the second microstructure; And
Liquid crystal cells, it is positioned at described polarizing diaphragm the place ahead, enter in the described liquid crystal cells from the described multi beam light of the part of described a plurality of polarizing diaphragm transmissions, and the Liquid Crystal Molecules Alignment direction that cooperates described liquid crystal cells to be carrying out the demonstration of image,
Wherein, suppose sandwiched the first angle theta between each first microstructure and the described body
1With the second angle theta
2, sandwiched the 3rd angle theta then between each second microstructure and the described body
3With the 4th angle theta
4, the interface angle of total reflection of described multi beam light when described a plurality of the first microstructures are left in the total reflection mode is as θ
c, the incident angle when light is incident to described the first microstructure is θ
i, n is the refractive index of described polarizing diaphragm, then has following relation:
sinθ
B＝[cos
2α/(1+n
2-2nsinα)]
1/2 (2)
α/2＝135-θ
1/2-θ
2-0.5sin
-1[sin(θ
i-θ
1)/n](3)
Therefore, can and enter in the liquid crystal cells so that most polarized light can be directly penetrated from the second microstructure, the polarized light of small part is then got back in the backlight module in the mode of total reflection simultaneously, with as the light source that again utilizes.
Below cooperate appended diagram to illustrate in detail by specific embodiment so that the effect that is easier to understand purpose of the present invention, technology contents, characteristics and reaches.
Description of drawings
Fig. 1 is the brightness enhancement film schematic cross-section of known upper quadrant water chestnut mirror structure;
Fig. 2 is known brightness enhancement film schematic cross-section to following formula water chestnut mirror structure;
Fig. 3 is the known structure of reflection reducting coating schematic diagram with two blast materials;
Fig. 4 is the first embodiment of the disclosed polarizing diaphragm of the present invention;
Fig. 5 is the local structure for amplifying schematic diagram of Fig. 4;
Fig. 6 is the structural representation with display device of polarizing diaphragm provided by the present invention.
[primary clustering symbol description]
10 backlight modules
The brightness enhancement film of 11 upper quadrant water chestnut mirror structures
12 diffusion sheets
13 brightness enhancement film to following formula water chestnut mirror structure
The structure of reflection reducting coating of 15 pairs of blast materials
151 first material layers, 152 second material layers
20 backlight modules, 22 polarizing diaphragms
221 first microstructures, 222 main bodys
223 second microstructures, 24 liquid crystal cells
Embodiment
Because the backlight module in display device belongs to the sizable assembly of power consumption, therefore, if can effectively improve the utilization ratio of light, just can reach the purpose that reduces power consumption, therefore, the light utilization ratio that how to improve backlight module is quite concerned subject under discussion all the time, and in order to improve the light utilization ratio of backlight module in the display device, the present invention discloses a kind of polarizing diaphragm and uses its next solution as this subject under discussion of display device.Below, expose embodiments of the invention and corresponding diagram, with detailed explanation technical characteristics of the present invention.
Please refer to shown in Figure 4, it is for the first embodiment of the disclosed polarizing diaphragm of the present invention, polarizing diaphragm 22 in this embodiment comprises the main body 222 with upper surface and lower surface, and have a plurality of the first microstructures 221 at lower surface, on upper surface, then have a plurality of the second microstructures 223, and design according to different product demands, above-mentioned in order to consist of body 222, the material of the first microstructure 221 and the second microstructure 223 can have identical refractive index, also or can be the material with different refractivity, and the first microstructure 221, the second microstructure 223 can utilize integrated production method to finish with body 222, or also can utilize adhesive agent or other fixation kit with respectively with the first microstructure 221, the second microstructure 223 is incorporated on the lower surface and upper surface of body 222.
More specifically, for the polarizing diaphragm of the described first embodiment of the present invention, because from the light of backlight module when leaving polarizing diaphragm proposed by the invention, at first light is when leaving the first microstructure 221, must leave in the mode of total reflection, in other words, namely before entering the second microstructure 223, light enters the second microstructure in the mode of total reflection, simultaneously, the light that enters the second microstructure 223 with total reflection with the angle of Brewster angle as incident angle so that from the light of the second microstructure 223 outgoing can be more near the angle of forward bright dipping.Based on above-mentioned main opticpath direction, below will further define the angle design between the first microstructure 221 and the second microstructure 223 and body 222 in the polarizing diaphragm proposed by the invention, wherein, sandwiched the first angle and the second angle between each first microstructure 221 and the body 222, then sandwiched the 3rd angle and the 4th angle between each second microstructure 223 and the body 222, and, wherein because light is necessary for total reflection when the first microstructure 221 is left, therefore the angle limits of the second angle must meet shown in the following formula (1) and (please refer to shown in Figure 5)
The θ in the above-mentioned formula (1) wherein
cBe the interface angle of total reflection, and θ
iIncident angle when being incident to the first microstructure 221 for light, in addition, according to the characteristic of Brewster angle as can be known, when light during from 223 outgoing of the second microstructure, the incident angle of its light presents the angle θ of Brewster angle
B, and θ
BSatisfy shown in the following formula (2),
sinθ
B＝[cos
2α/(1+n
2-2nsinα)]
1/2 (2)
Wherein, α and the θ in formula (2)
2Relation then must satisfy again shown in the following formula (3),
α/2＝135-θ
1/2-θ
2-0.5sin
-1[sin(θ
i-θ
1)/n](3)
Therefore, according to the result of calculation of above-mentioned formula (1), formula (2) and formula (3) as can be known, the first angle theta of institute's sandwiched between the first microstructure 221 in the polarizing diaphragm proposed by the invention and the body 222
1With the second angle theta
2, the first angle theta wherein
1Scope between the 10-55 degree, the second angle theta
2Scope then between the 50-90 degree, and for the 3rd angle theta of institute's sandwiched between the second microstructure 223 in the polarizing diaphragm and the body 222
3With the 4th angle theta
4, the 3rd angle theta wherein
3Scope between the 40-70 degree, but, according to the optical design of integral body, the 4th angle theta in the second microstructure 223
4The necessity that does not then have limited angular.
In addition, except above-mentioned various architectural features, the thickness of the body 222 in the polarizing diaphragm 22, the first microstructure 221 and the second microstructure 223 can be according to the design of above-mentioned parameter or the specification demands of different product, to carry out corresponding adjustment.
Practical situation between the route that its light is advanced and the angle of each microstructure then still please continue with reference to shown in Figure 5, wherein, in this embodiment, be used for body 222, the first microstructure 221 and the material of the second microstructure 223 provide identical refractive index, for example, body 222, the refractive index of the material of the first microstructure 221 and the second microstructure 223 is all 1.5, and body 222, all first microstructures 221 are all integrated structure with all second microstructures 223, wherein, the thickness of the first microstructure 221 and the second microstructure 223 is 50 microns, body 222 then has 125 microns thickness, and under the use of this kind material, the first angle theta between the first microstructure 221 and the body 222
1Be 36.3 degree, the second angle theta
2Be 72.5 degree, and the 3rd angle theta between the second microstructure 223 and the body 222
3Be 57 degree, although and the 4th angle theta between the second microstructure 223 and the body 222
4Do not need to go especially definition, but, the 4th angle theta in this embodiment
4Then be rendered as 40 degree.Then, still please refer to Fig. 5, the path of the direction of arrow wherein in order to represent that light is advanced is because light is from the first angle theta of the first microstructure 221
1In the first inclined-plane enter in the first microstructure 221, according to refractive index and first angle theta of the first microstructure 221
1Design so that this light is in the second angle theta of the first microstructure 221
2In the second inclined-plane suffer from total reflection and transmission body 222 entering in the second microstructure 223, and so that leave from the first microstructure 221 and enter the 3rd angle theta that the light of the second microstructure 223 can Brewster angle incidence to the second microstructure 223
3The 3rd inclined-plane on, and according to the angle design of the second microstructure 223, the light that reflects away via the 3rd inclined-plane penetrates with the suitable shooting angle near normal direction, again because the angle of incident presents Brewster angle θ
BThereby, can leave the second microstructure 223 from the 3rd inclined-plane via the mode of refraction fully so that have all polarized lights of the polarization state that is parallel to the plane of incidence in this light, and the angle of its outgoing is quite close to normal direction, the polarized light that has perpendicular to the polarization state of the plane of incidence is that the ear law is with the part refraction according to department then, the mode of part reflection is transmitted, in other words, there is part to reflect on the 3rd inclined-plane perpendicular to the polarized light of the polarization state of the plane of incidence and leaves the second microstructure 223, and the angle of its outgoing is also quite close to normal direction, and part can reflect on the 3rd inclined-plane perpendicular to the polarized light of the polarization state of the plane of incidence, and these polarized lights further suffer from total reflection on the 4th corresponding inclined-plane, so that these partial poolarized lights that have perpendicular to the polarization state of the plane of incidence can constantly circulate, and then improve the utilization ratio of light.
Therefore, by above-mentioned optical path as can be known, because the 22 employed materials of the polarizing diaphragm in above-described embodiment have specific refractive index, and cooperate simultaneously the first angle theta in the first microstructure 221
1, the second angle theta
2With the 3rd angle theta in the second microstructure 223
3Special angle design so that the light of incident can be through after the first microstructure 221, enter the second microstructure 223 in the mode of total reflection, and present Brewster angle θ so that enter the angle of incidence of light of the second microstructure 223 simultaneously
BTherefore, characteristic by Brewster angle, can penetrate by the second microstructure 223 so that be parallel to all polarized lights of the polarization state of the plane of incidence, and part is the ear law with from 223 ejaculations of the second microstructure perpendicular to the polarized light of the polarization state of the plane of incidence also utilization department, only remaining part can via the 4th inclined-plane of the second microstructure 223, re-start the utilization of light perpendicular to the polarized light of the polarization state of the plane of incidence to utilize total reflection.
In addition, because the 4th inclined-plane between the second microstructure 223 and the body 222 only is used for making reflection from the partial poolarized light on the 3rd inclined-plane, also therefore can illustrate for the 4th angle theta on the second microstructure 223
4, it is that the requirement on the angle does not have such as the first angle theta in the first microstructure 221
1, the second angle theta
2Or second the 3rd angle theta in the microstructure 223
3Come to get reason strictly.
The above exposes the embodiment of wherein a kind of polarizing diaphragm of the present invention, below, then will be again from the angle of display device technical characterictic of the present invention be described.
Please refer to shown in Figure 6, it is a kind of structural representation with display device of polarizing diaphragm provided by the present invention, in display device, comprise backlight module 20 and liquid crystal cells 24, and polarizing diaphragm 22 is between backlight module 20 and liquid crystal cells 24, this polarizing diaphragm 22 comprises body 222, a plurality of the first microstructures 221 and a plurality of the second microstructures 223, and according to different manufacturing method thereofs and different product demands, the first microstructure 221, the second microstructure 223 can utilize integrated processing procedure mode or extra fixed form with body 222 combinations, and same as described above, be folded with the first angle theta between the first microstructure 221 and the body 222
1With the second angle theta
2, and the first angle theta
1Angular range between the 10-55 degree, the second angle theta
2Angular range then between the 50-90 degree, and be folded with the 3rd angle theta between the second microstructure 223 and the body 222
3With the 4th angle theta
4, and the 3rd angle theta
3Angular range between the 40-70 degree, and the 4th angle theta
4The scope that then determines its angle according to different structure kenels and product demand.
Therefore, the disclosed display device of comprehensive above-mentioned Fig. 6 as can be known, when backlight module 20 provides light (direction as shown by arrows in FIG. is the route that light is advanced), after this light can enter polarizing diaphragm 22, at first enter in the first microstructure 221 on body 222 lower surfaces, after entering through the first inclined-plane, then meet with total reflection on the second inclined-plane and penetrated body 222 to enter in the second microstructure 223, and the angle that presents with Brewster angle because of the light that are incident in the second microstructure 223 enters, have two kinds of circulation ways based on light itself, in other words, namely be parallel to the fluctuation of light working direction and perpendicular to the fluctuation of light working direction, again take Brewster angle behind incident angle, can be fully via the mode that reflects so that be parallel to all polarized lights of the polarization state of the plane of incidence, the 3rd inclined-plane in the second microstructure 223 leaves and enters in the liquid crystal cells 24, and the angle of its outgoing is quite close to normal direction, has polarized light perpendicular to the polarization state of the plane of incidence then with the part refraction, the mode of part reflection is transmitted, that is to say, there is part to reflect on the 3rd inclined-plane perpendicular to the polarized light of the polarization state of the plane of incidence and leaves the second microstructure 223 and enter in the liquid crystal cells 24, and the angle of its outgoing is also quite close to normal direction, and part can reflect on the 3rd inclined-plane perpendicular to the polarized light of the polarization state of the plane of incidence, and further suffer from total reflection on the 4th corresponding inclined-plane and turn back in the backlight module 20, so that these a little polarization lights can utilize reflecting assembly in the backlight module 20 to reach the purpose of continuous these polarization lights of recycling with the reflection of carrying out light, therefore, the light that finally enters in the liquid crystal cells 24 can under the prerequisite that does not increase backlight module 20 power budget, utilize the utilization ratio that improves light to promote significantly the display brightness of liquid crystal cells 24.
In addition, no matter for above-mentioned Fig. 4 or polarizing diaphragm shown in Figure 6 22, a plurality of the first microstructures 221 on body 222 lower surfaces wherein and a plurality of the second microstructures 223 on the upper surface all present the angular shape of triangle of tool, and for the light from backlight module 20 can be advanced according to specific opticpath when passing through these first microstructures 221 with special angle design and the second microstructure 223, the thickness of these first microstructures 221 and the second microstructure 223 must be in certain margin tolerance, take have 50 microns as the height the first microstructure 221 and the second microstructure 223 as example, in height acceptable margin tolerance is between about 1 micron, otherwise, excessive difference in height will cause through the first different microstructures 221, or second corresponding shooting angle or the incident angle of multi beam light that obtain of microstructure 223, the light refraction angle occurs in meeting or the reflection angle skew is excessive, or exit direction is inconsistent and cause the problem of light scattering etc., and then obtain so that the result that the localization effects variation of light and light utilization ratio reduce.
In sum, the disclosed a kind of polarizing diaphragm of the present invention and use its display device, it can be by having a plurality of the first microstructures and a plurality of second microstructure of special angle design the setting of polarizing diaphragm body, so that light can be sent to these light in the liquid crystal cells by more concentrated rising angle through after these microstructures, so that the brightness of whole display device can not increase under the luminous load prerequisite of backlight module, promote significantly the utilization ratio of light, and after the test of reality, find, be provided with the display device of the disclosed polarizing diaphragm of the present invention on the light utilization ratio that provides for backlight module, more known use exceeds at least 5% to the light utilization ratio that the display device of the brightness enhancement film of following formula water chestnut mirror structure reaches, therefore, the present invention really can be in the situation that additionally do not increase energy and consume, significantly so that the utilization ratio of light be raised.
The above illustrates characteristics of the present invention by embodiment; its purpose is to make those skilled in the art can understand content of the present invention and implements according to this; and non-limiting protection scope of the present invention; therefore; all other do not break away from disclosed spirit and the equivalence finished is modified or revise, and must be included in the scope of the following stated claim.
Claims (14)
1. polarizing diaphragm, it is applied in the display device, and the multi beam light in the described display device is through described polarizing diaphragm, and described polarizing diaphragm comprises:
Body, it has upper surface and lower surface;
A plurality of the first microstructures, it is positioned on the described lower surface of described body; And
A plurality of the second microstructures, it is positioned on the described upper surface of described body, and described multi beam light is after described a plurality of the first microstructures are left in the total reflection mode, with Brewster angle θ
BEnter in described a plurality of the second microstructure,
Wherein, suppose sandwiched the first angle theta between each first microstructure and the described body
1With the second angle theta
2, sandwiched the 3rd angle theta then between each second microstructure and the described body
3With the 4th angle theta
4, the interface angle of total reflection of described multi beam light when described a plurality of the first microstructures are left in the total reflection mode is as θ
c, the incident angle when light is incident to described the first microstructure is θ i, n is the refractive index of described polarizing diaphragm, then has following relation:
sinθ
B＝[cos
2α/(1+n
2-2nsinα)]
1/2 (2)
α/2＝135-θ
1/2-θ
2-0.5sin
-1[sin(θ
i-θ
1)/n](3)。
2. polarizing diaphragm as claimed in claim 1, wherein, the described upper surface of described a plurality of the first microstructures and described body is integrated.
3. polarizing diaphragm as claimed in claim 1, wherein, described a plurality of the first microstructures and described body are absolute construction.
4. polarizing diaphragm as claimed in claim 1, wherein, the described lower surface of described a plurality of the second microstructures and described body is integrated.
5. polarizing diaphragm as claimed in claim 1, wherein, described a plurality of the second microstructures and described body are absolute construction.
6. polarizing diaphragm as claimed in claim 1, wherein, described a plurality of the first microstructures be shaped as triangle, and the angle of described the first microstructure is decided by the material of described the first microstructure, described body, described a plurality of the second microstructures.
7. polarizing diaphragm as claimed in claim 6, wherein, described a plurality of the first microstructures be shaped as triangle, and sandwiched the first angle and the second angle between described a plurality of the first microstructure and the described body.
8. polarizing diaphragm as claimed in claim 7, wherein, the angle of described the first angle is between the 10-55 degree.
9. polarizing diaphragm as claimed in claim 7, wherein, the angle of described the second angle is between the 50-90 degree.
10. polarizing diaphragm as claimed in claim 1, wherein, described a plurality of the second microstructures be shaped as triangle, and the angle of described the second microstructure is decided by the material of described the first microstructure, described body, described a plurality of the second microstructures.
11. polarizing diaphragm as claimed in claim 10, wherein, described a plurality of the second microstructures be shaped as triangle, and sandwiched the 3rd angle and the 4th angle between described a plurality of the second microstructure and the described body.
12. polarizing diaphragm as claimed in claim 11, wherein, the angle of described the 3rd angle is between the 40-70 degree.
13. polarizing diaphragm as claimed in claim 1, wherein, described multi beam light is from backlight module, described multi beam light enters in described a plurality of the second microstructure with Brewster angle, the described multi beam light of part is from described a plurality of the second microstructure transmissions, and the described multi beam light of part then leaves described a plurality of the second microstructure in the total reflection mode and again enters in the described backlight module.
14. a display device, it comprises:
Backlight module, it has light source so that multi beam light to be provided;
At least one polarizing diaphragm, it is positioned at described backlight module the place ahead, and described polarizing diaphragm comprises:
Body, it has upper surface and lower surface;
A plurality of the first microstructures, it is positioned on the described lower surface of described body; And
A plurality of the second microstructures, it is positioned on the described upper surface of described body, and described multi beam light is after described a plurality of the first microstructures are left in the total reflection mode, with Brewster angle θ
BEnter in described a plurality of the second microstructure; And
Liquid crystal cells, it is positioned at described polarizing diaphragm the place ahead, enter in the described liquid crystal cells from the described multi beam light of the part of described polarizing diaphragm transmission, and the Liquid Crystal Molecules Alignment direction that cooperates described liquid crystal cells to be carrying out the demonstration of image,
Wherein, suppose sandwiched the first angle theta between each first microstructure and the described body
1With the second angle theta
2, sandwiched the 3rd angle theta then between each second microstructure and the described body
3With the 4th angle theta
4, the interface angle of total reflection of described multi beam light when described a plurality of the first microstructures are left in the total reflection mode is as θ
c, the incident angle when light is incident to described the first microstructure is θ
i, n is the refractive index of described polarizing diaphragm, then has following relation:
sinθ
B＝[cos
2α/(1+n
2-2nsinα)]
1/2 (2)
α/2＝135-θ
1/2-θ
2-0.5sin
-1[sin(θ
i-θ
1)/n](3)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710141124 CN101363990B (en) | 2007-08-08 | 2007-08-08 | Polarizing diaphragm and display apparatus using the same |
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|---|---|---|---|
| CN 200710141124 CN101363990B (en) | 2007-08-08 | 2007-08-08 | Polarizing diaphragm and display apparatus using the same |
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| CN101363990B true CN101363990B (en) | 2013-02-06 |
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| WO2015141369A1 (en) * | 2014-03-20 | 2015-09-24 | シャープ株式会社 | Illumination device and display device |
| TWI686305B (en) * | 2018-07-20 | 2020-03-01 | 友達光電股份有限公司 | Optical film |
| CN112987406A (en) * | 2021-03-25 | 2021-06-18 | 京东方科技集团股份有限公司 | Backlight module and display device |
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| CN1534313A (en) * | 2003-04-02 | 2004-10-06 | 美国微感技术公司 | Reflector for converting polarization direction of polarized light and component element thereof |
| CN1601347A (en) * | 2004-10-25 | 2005-03-30 | 友达光电股份有限公司 | LCD modular and polarized optical brightening membrane |
| WO2006007286A3 (en) * | 2004-06-17 | 2006-02-23 | 3M Innovative Properties Co | Polymerizable compositions comprising nanoparticles |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1534313A (en) * | 2003-04-02 | 2004-10-06 | 美国微感技术公司 | Reflector for converting polarization direction of polarized light and component element thereof |
| WO2006007286A3 (en) * | 2004-06-17 | 2006-02-23 | 3M Innovative Properties Co | Polymerizable compositions comprising nanoparticles |
| CN1601347A (en) * | 2004-10-25 | 2005-03-30 | 友达光电股份有限公司 | LCD modular and polarized optical brightening membrane |
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| JP特开平11－30714A 1999.02.02 |
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| CN101363990A (en) | 2009-02-11 |
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