Control device for the luminance viewing angle of a flat panel display

Abstract

The application discloses a kind of control device of plane directivity brightness viewing angle in the field of light exit luminance viewing angle control, control device includes the upper cover plate and lower cover plate of parallel arrangement, the four around of upper cover plate and lower cover plate is equipped with sealing plate;Lower cover plate is fixedly provided with several elastic and transparent cylinders, the upper end of cylinder is fixedly provided with rigid and transparent cone, cylinder and cone can conduct electricity;Upper cover plate is provided with positive electrode area above each cylinder, and lower cover plate is provided with negative electrode area corresponding to positive electrode area;Each positive electrode area includes multiple independent positive electrodes, and the same point position of adjacent positive electrode is identical to the distance of the top end of corresponding cone;The control device can control light exit luminance viewing angle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of light emission brightness view angle control, in particular to a planar directivity brightness view angle control device. BACKGROUND

[0002] The liquid crystal display backlight assembly, the brightness directivity control of planar illumination is through changing the design of backlight cavity or optical module to realize the brightness view angle deflection, but generally can only deflect on the fixed angle, cannot realize the free control according to actual needs.

[0003] Therefore, it is urgent to provide a planar directivity brightness view angle control device to solve the above technical problems. SUMMARY

[0004] The purpose of the present application is to provide a planar directivity brightness view angle control device, which can control the light emission brightness view angle.

[0005] In order to achieve the above purpose, the present application provides a planar directivity brightness view angle control device, which comprises an upper cover plate and a lower cover plate arranged in parallel, and a sealing plate is mounted around the upper cover plate and the lower cover plate;

[0006] A plurality of elastic and transparent cylinders are fixedly arranged on the lower cover plate, a rigid and transparent cone is fixedly arranged at the upper end of the cylinder, and the cylinder and the cone can conduct electricity;

[0007] A positive electrode area is arranged above each cylinder on the upper cover plate, and a negative electrode area corresponding to the positive electrode area is arranged on the lower cover plate; each positive electrode area comprises a plurality of independent positive electrodes, and the distance from the same point of adjacent positive electrodes to the top end of the corresponding cone is the same.

[0008] Preferably, the positive electrode area is arranged as a regular polygon, and an independent positive electrode is arranged on each side of the regular polygon.

[0009] Preferably, the positive electrode area is arranged as a ring, and at least two positive electrodes are arranged at equal intervals on the circumference of the ring.

[0010] Preferably, the negative electrode area on the lower cover plate is divided into a plurality of independent areas, and each area corresponds to a positive electrode area.

[0011] Preferably, the distance between adjacent positive electrodes in the same positive electrode area is 0.1-5 μm.

[0012] Preferably, a plurality of transparent supporting columns are mounted between the upper cover plate and the lower cover plate to support the upper cover plate and the lower cover plate.

[0013] Preferably, the support column is a cylindrical column.

[0014] Preferably, the refractive index of the conical body is 1.1-2.0.

[0015] Preferably, the refractive index of the cylindrical body is the same as that of the conical body.

[0016] Preferably, the cavity between the upper cover plate and the lower cover plate is filled with air, inert gas, non-conductive liquid or is set as vacuum.

[0017] According to the above technical solution, the driving circuit controls the independent opening of different positive electrodes in the positive electrode region, and under the joint action of the positive electrode and the negative electrode, the elastic conductive cylindrical body is driven to tilt to one side, and then the rigid conical body on the elastic cylindrical body is tilted. The greater the voltage applied on the positive electrode, the greater the angle of deflection of the cylindrical body and the conical body; the voltage applied on different positive electrodes can change the deflection direction of the cylindrical body and the conical body. When the light is incident from bottom to top, the exit angle of the light will change accordingly with the deflection of the conical body, so as to achieve the purpose of controlling the brightness and viewing angle of the light.

[0018] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0020] Figure 1 is a front cross-sectional structure schematic diagram of one embodiment of the present application;

[0021] Figure 2 is a distribution schematic diagram of the positive electrode region and the negative electrode region in the present application.

[0022] MARKING OF THE DRAWINGS

[0023] 1-upper cover plate, 2-lower cover plate, 3-sealing plate, 4-cylindrical body, 5-conical body, 6-positive electrode region, 7-negative electrode region, 8-support column. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application will be described in detail below in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0025] The application provides a control device for planar directional luminance view angle, which comprises upper cover plate 1 and lower cover plate 2 arranged in parallel, sealing plate 3 is installed around the upper cover plate 1 and the lower cover plate 2, and the spacing between the upper cover plate 1 and the lower cover plate 2 can be set as 20-500 μm;

[0026] A plurality of elastic and transparent cylinders 4 are fixedly arranged on the lower cover plate 2, the upper end of the cylinder 4 is fixedly arranged with rigid and transparent cone 5, and the cylinder 4 and the cone 5 can conduct electricity; the rigid and transparent cone 5 does not change in side shape even if it is inclined, reduces the variable, improves the accuracy of controlling the light luminance view angle, and reduces the difficulty. The elastic and transparent cylinder 4 can be compressed and rebounded, that is, it can be deflected to one side, which is convenient for deflecting the cone 5 on it.

[0027] The ratio of the bottom diameter of the cone 5 to the height of the cone body is 0.1-10, and the bottom diameter of the cone 5 is 10-100 μm; the height of the cylinder 4 is 0.1-10 times of the bottom diameter, and the spacing between adjacent cylinders 4 is 1-20 μm.

[0028] A positive electrode area 6 is arranged above each cylinder 4 on the upper cover plate 1, and a negative electrode area 7 corresponding to the positive electrode area 6 is arranged on the lower cover plate 2; each positive electrode area 6 comprises a plurality of independent positive electrodes, and the same point of adjacent positive electrodes is the same distance from the top end of the corresponding cone 5. Since the upper and lower cover plates 2 are arranged in parallel, the positive electrode area 6 and the negative electrode area 7 are also opposite, the axis of the cone 5 and the cylinder 4 is perpendicular to the upper and lower cover plates 2, and the unified arrangement is convenient for corresponding the voltage size, the cone 5 deflection angle and the light exit luminance view angle, reducing the control difficulty and improving the control accuracy.

[0029] The method for adjusting the light luminance view angle by using the control device is that the driving circuit controls the independent opening of different positive electrodes in the positive electrode area 6, under the joint action of the positive electrode and the negative electrode, the elastic and conductive cylinder 4 is driven to tilt to one side, and then the rigid cone 5 on the elastic cylinder 4 is tilted. The greater the voltage applied to the positive electrode, the greater the deflection angle of the cylinder 4 and the cone 5; by applying voltage to different positive electrodes, the deflection direction of the cylinder 4 and the cone 5 can be changed. When the light is incident from bottom to top, the exit angle of the light will change accordingly with the deflection of the cone 5, so as to achieve the purpose of controlling the light exit luminance view angle.

[0030] In the embodiment, the positive electrode area 6 is arranged as a regular polygon, and an independent positive electrode is arranged on each side of the regular polygon. The distance between adjacent positive electrodes is the same, and the center point of the regular polygon is located on the axis of the cone 5. The more the number of sides of the regular polygon, the more the deflection angle of the cone 5, and the control of the deflection angle is more accurate.

[0031] In the embodiment, the positive electrode area 6 is arranged in a ring shape, and at least two positive electrodes are arranged at equal intervals in the circumferential direction of the ring shape. Preferably, the number of positive electrodes is between 2 and 20.

[0032] In the embodiment, the negative electrode area 7 on the lower cover plate 2 is divided into several independent areas, and each area corresponds to a positive electrode area 6. Compared with the whole lower cover plate 2 as a common negative electrode, the division into independent negative electrode areas 7 can further improve the polarization ability of the light path.

[0033] In the embodiment, the interval between adjacent positive electrodes in the same positive electrode area 6 is 0.1-5 μm.

[0034] In the embodiment, a plurality of transparent support columns 8 are arranged between the upper cover plate 1 and the lower cover plate 2 to support the upper cover plate 1 and the lower cover plate 2. The support columns 8 can be arranged at equal intervals, and the upper and lower ends thereof are connected to the upper cover plate 1 and the lower cover plate 2, respectively, so that the intervals of corresponding points of the upper cover plate 1 and the lower cover plate 2 are equal.

[0035] In the embodiment, the support column 8 is a cylindrical column, and the diameter of the column is 1-50 μm.

[0036] In the embodiment, the refractive index of the conical body 5 is 1.1-2.0.

[0037] In the embodiment, the refractive index of the cylindrical body 4 is the same as that of the conical body 5. The light first vertically enters the elastic cylindrical body 4 from below, and then enters the conical body 5 from the cylindrical body 4. When the cylindrical body 4 is deflected, the joint surface of the cylindrical body 4 and the conical body 5 is no longer perpendicular to the light. Since the refractive indexes of the two are the same, the refraction of the light at the joint surface can be avoided, thereby reducing the control variable and the control difficulty.

[0038] In the embodiment, the cavity between the upper cover plate 1 and the lower cover plate 2 is filled with air, inert gas, non-conductive liquid, or is arranged as a vacuum.

[0039] The preferred embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the specific details in the above-described embodiments. Within the technical concept of the application, various simple modifications can be made to the technical solutions of the application, and these simple modifications all belong to the protection scope of the application.

[0040] In addition, it should be noted that each specific technical feature described in the above-described specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the application.

[0041] Furthermore, the various embodiments of the present application can be combined with each other, as long as it does not violate the spirit of the present application, and it should be considered as disclosed in the present application.

Claims

1. A device for controlling the luminance view angle of a flat directional pattern, characterized in that The control device comprises upper cover plate (1) and lower cover plate (2) arranged in parallel, and sealing plate (3) is installed around the upper cover plate (1) and the lower cover plate (2); A plurality of elastic and transparent cylinders (4) are fixedly arranged on the lower cover plate (2), rigid and transparent cones (5) are fixedly arranged on the upper ends of the cylinders (4), the cylinders (4) and the cones (5) can conduct electricity, and the axes of the cones (5) and the cylinders (4) are perpendicular to the upper cover plate (1) and the lower cover plate (2) respectively; A positive electrode area (6) is arranged above each of the cylinders (4) on the upper cover plate (1), and a negative electrode area (7) corresponding to the positive electrode area (6) is arranged on the lower cover plate (2); each of the positive electrode areas (6) comprises a plurality of independent positive electrodes, and the distances from the same points of adjacent positive electrodes to the top end of the corresponding cone (5) are the same.

2. The control device according to claim 1, characterized by The positive electrode area (6) is arranged as a regular polygon, and an independent positive electrode is arranged on each side of the regular polygon.

3. The control device of claim 1, wherein The positive electrode area (6) is arranged as a ring, and at least two positive electrodes are arranged at equal intervals in the circumferential direction of the ring.

4. The control device according to claim 2 or 3, characterized by The negative electrode area (7) on the lower cover plate (2) is divided into a plurality of independent areas, and each area corresponds to one of the positive electrode areas (6).

5. The control device according to claim 2 or 3, characterized by The distance between adjacent positive electrodes in the same positive electrode area (6) is 0.1-5 μm.

6. The control device of claim 1, wherein A plurality of transparent support columns (8) are arranged between the upper cover plate (1) and the lower cover plate (2) to support the upper cover plate (1) and the lower cover plate (2).

7. The control device of claim 6, wherein The support column (8) is a cylindrical column.

8. The control device of claim 1, wherein The refractive index of the cone (5) is 1.1-2.

0.

9. The control device of claim 7, wherein The refractive index of the cylinder (4) is the same as that of the cone (5).

10. The control device of claim 1, wherein The cavity between the upper cover plate (1) and the lower cover plate (2) is filled with air, inert gas, non-conductive liquid or is arranged as vacuum.

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