TWM455887U - Supporting device - Google Patents

Description

Support device

The present invention relates to a support device, and more particularly to a support device for use in a light mixing device.

The existing light mixing device is widely used in the backlight of a liquid crystal display device, or in a lighting fixture, an advertising light box, and a special optical device. The purpose of the light mixing device is to uniformly mix the light energy generated by the light emitting unit to make the light output. The luminosity is uniform throughout the surface to enhance optical quality.

Liquid crystal display devices have long been used in portable electronic products such as notebook computers, mobile phones, digital cameras, video cameras, and personal digital assistants (PDAs). In addition to these smaller portable products, the recent large-size LCD panel manufacturing technology has matured. For example, desktop LCDs have replaced cathode ray tubes (CRTs, also known as image tubes), and LCD TVs have replaced traditional video tube TVs with their compact size and clear picture. The liquid crystal panel is the most critical display component in this field, but it does not emit light by itself, and it is necessary to use the light provided by the backlight to display the image. Many backlight technologies exist today, and in large-size liquid crystal display devices of 20 inches or more, a direct-lit backlight module is often used as a backlight of the liquid crystal panel.

The direct type backlight module has the advantages of high cost performance and good optical stability. The basic structure of the direct type backlight module includes a back plate, an optical film, a light emitting unit and a supporting device, and the light emitting unit is, for example, a light emitting diode, and the optical film is, for example, a diffusing plate, a diffusion sheet and a prism sheet. The light-emitting unit is disposed on the back plate and located between the optical film and the back plate. One end of the supporting device abuts the optical film and the other end abuts the back plate, and the supporting device functions to provide a certain height for the backlight module. The light mixing space enables the light generated by the light emitting unit to be mixed in the light mixing space to obtain a uniform surface light source.

The support device in the existing direct type backlight module is accustomed to adopting a white plastic material and a conical structure. However, the support device of the white conical structure may cause shadows due to blocking part of the light of the light-emitting unit, which seriously affects optical uniformity and display. The visual effect of the device. At present, in order to solve the shadow caused by the supporting device in the direct type backlight module, a common method is to reduce the influence of the shadow by increasing the number of optical films (for example, a diffusion plate, a diffusion sheet, a prism sheet, etc.). This method has the following disadvantages:
1. Increase the number of optical diaphragms to increase the cost of the backlight module;
2. Increasing the number of optical diaphragms reduces the overall brightness of the backlight module.

Therefore, there is an urgent need in the market to develop a backlight module that not only eliminates shadows, but also has low cost without reducing overall brightness. Please refer to FIG. 1 . FIG. 1 is a cross-sectional view of a conventional backlight module. FIG. 1 shows a backlight module 1 that can be used to fade shadows. The support device 100 includes a pillar 110 and a connector 120 . And the fixing member 130, and the supporting device 100 has a certain light transmittance. The fixing member 130 is engaged with the backing plate 12, and the connecting member 120 is attached to the inner surface of the backing plate 12. The pillar 110 is located between the backing plate 12 and the optical film 11, and is connected to the fixing member by the connecting member 120. 130 is fixed to the backing plate 12 and supports the optical film 11. A plurality of light-emitting units 13 are disposed on the back plate 12, and the light-emitting unit 13 and the column 110 are in a corresponding relationship, that is, the light-emitting unit 13 is distributed in a central symmetrical pattern on the back plate 12, and the column 110 is located at the center of the central symmetrical figure, and The light-emitting units 13 are respectively located on the center line of the bottom side of the side surface of the column 110, and the structure can significantly reduce the shadow. However, the column 110 and the fixing member 130 are disposed on the same axis, or the fixing member 130 is located directly below the bottom surface of the column 110, and the material of the supporting device 100 is translucent, which causes part of the light to follow the column. The 110 and the fixing member 130 are leaked out, thereby causing a point-like shadow at the column 110, which affects the light mixing effect of the backlight module.

In view of this, the purpose of the present invention is to provide a supporting device which can eliminate the shadow caused by the supporting device itself when used in a backlight module or a light mixing device, and at the same time reduce the cost without reducing the overall brightness. .

In order to achieve the above object, the present invention proposes a supporting device comprising a cylinder, a connecting member and a fixing member. The cylinder has a bottom surface, and the connecting member has opposite upper and lower surfaces, and the area of the upper surface is larger than the area of the bottom surface of the cylinder. The upper surface is connected to the bottom surface, and the bottom surface projects a projection area on the lower surface along the normal direction of the lower surface. The fixing member is connected to the lower surface, and the connecting portion of the fixing member and the lower surface does not overlap with the projection area.

In an embodiment of the present invention, the column has a light transmittance greater than or equal to 50%.

In an embodiment of the present invention, the upper surface of the connecting member is a flat surface, a convex surface or a concave surface, and the upper surface may further be provided with a light diffusing microstructure or a light reflecting coating.

In an embodiment of the present invention, the lower surface of the connecting member is a flat surface, a convex surface or a concave surface, and the lower surface may further be provided with a light diffusing microstructure or a light reflecting coating.

In an embodiment of the present invention, the projection area is a plane, a convex surface or a concave surface, and the projection area may also be provided with a light diffusion microstructure or a light reflective coating.

In an embodiment of the present invention, the fixing member includes a positioning post and a hook.

In an embodiment of the present invention, the number of the fixing members is two or more, and/or the number of the columns is two or more.

In an embodiment of the present invention, the pillar is a prismatic structure, a prismatic structure, a truncated cone structure or a cylindrical structure, and the column body has a top portion at one end facing away from the connecting member, and the top portion has a flat surface, a convex surface or a concave surface.

In an embodiment of the present invention, a projection surface of the connecting member is circular, rectangular, triangular or irregular.

In an embodiment of the present invention, the pillar, the connecting member and the fixing member are integrally formed.

The support device proposed by the present invention is used in a backlight module or a light mixing device to eliminate the shadow caused by the support device itself, and to prevent the light of the light-emitting unit from leaking through the column and the fixing member of the support device, and at the same time Reduce costs without reducing overall brightness.

To make the objects, features, and advantages of the present invention more comprehensible to those of ordinary skill in the art, the following description of the preferred embodiments and the accompanying drawings are set forth below.

<Prior technology>

1‧‧‧Backlight module

11‧‧‧Optical diaphragm

12‧‧‧ Backplane

13‧‧‧Lighting unit

100‧‧‧Support device

110‧‧‧Cylinder

120‧‧‧Connecting parts

130‧‧‧Fixed parts

<this creation>

2‧‧‧Backlight module

21‧‧‧Optical diaphragm

22‧‧‧ Backplane

23‧‧‧Lighting unit

24‧‧‧Positioning holes

200, 300, 400‧‧‧ support devices

210, 210a, 210b, 310, 410‧‧‧ columns

211, 211a, 211b‧‧‧ top

212, 212a, 212b‧‧‧ bottom

220, 320, 420‧‧‧ connectors

220a, 220b, 220c, 220d, 220e, 220f‧‧‧ connectors

221‧‧‧ upper surface

222‧‧‧ lower surface

223‧‧‧Projection area

224‧‧‧ Connection

230, 330, 430‧‧‧ fixing parts

431‧‧‧ card hook

432‧‧‧Positioning column

FIG. 1 is a cross-sectional view showing a conventional backlight module.

2 is a cross-sectional view of a support device in accordance with a preferred embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a backlight module according to a preferred embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a support device according to another preferred embodiment of the present invention.

FIG. 5 is a schematic top view of a cylinder of a plurality of preferred embodiments of the present invention.

FIG. 6 is a top plan view showing a connector of a plurality of preferred embodiments of the present invention.

FIG. 7 is a cross-sectional view showing a support device according to still another preferred embodiment of the present invention.

Please refer to FIG. 2 , which is a schematic cross-sectional view of a support device according to a preferred embodiment of the present invention. The support device 200 can be used in a backlight module of a display device, and can also be used for lighting fixtures, advertising light boxes, and special optics. In the light mixing device of the device. The support device 200 includes a cylinder 210, a connecting member 220 and a fixing member 230. The cylinder 210 has an opposite top portion 211 and a bottom surface 212. The connecting member 220 has an opposite upper surface 221 and a lower surface 222. The upper surface 221 has an area larger than the area of the bottom surface 212. The upper surface 221 is connected to the bottom surface 212, and the bottom surface 212 projects a projection area 223 on the lower surface 222 along the normal direction of the lower surface 222. The fixing member 230 is connected to the lower surface 222, and the joint 224 where the fixing member 230 and the lower surface 222 are connected to each other is located outside the projection area 223, that is, the joint 224 and the projection area 223 do not overlap each other.

In this embodiment, the upper surface 221, the lower surface 222, and the projection area 223 of the connecting member 220 are all planar; in other embodiments, the upper surface, the lower surface, and the projection area of the connecting member may also be convex or concave, and A light diffusing microstructure or a light reflecting coating may be disposed on the upper surface, the lower surface, and the projection area to improve the light mixing effect. The light transmittance of the cylinder 210 is 50% to 100%. In general, the higher the light transmittance, the better the effect of eliminating the shadow. The light transmittance of the connecting member 220 and the fixing member 230 may be 0 to 100%, and the light transmittances of the column 210, the connecting member 220 and the fixing member 230 may be the same as or different from each other. In addition, in the embodiment, the column 210, the connecting member 220 and the fixing member 230 are integrally formed; in other embodiments, the column, the connecting member and the fixing member can also be pre-made into separate parts, and further assembled. To support the device.

Referring to FIG. 3 , FIG. 3 is a schematic cross-sectional view of a backlight module according to a preferred embodiment of the present invention. The backlight module 2 includes an optical film 21 , a back plate 22 , a light emitting unit 23 , and a supporting device 200 . The supporting device 200 is exemplified by FIG. 2 . A positioning hole 24 is formed in the back plate 22, and the fixing member 230 of the supporting device 200 and the positioning hole 24 correspond to each other, and the fixing member 230 can pass through the positioning hole 24, thereby fixing the connecting member 220 and the column 210 to the back plate 22. Pre-determined location. The light-emitting unit 23 is disposed on the back plate 22. In the embodiment, the light-emitting unit 23 uses a light-emitting diode, and the plurality of light-emitting units 23 form a complex array of center-symmetric patterns on the back plate 22, and the pillar 210 is located thereon. The center of the central symmetrical figure, for example, four light-emitting units 23 are a group and are respectively located at four corner points of the square, and the cylinder 210 is located at the intersection of the diagonals of the square. The top portion 211 of the cylinder 210 abuts the optical film 21 to form a light mixing space between the optical film 21 and the back plate 22. A part of the light generated by the light-emitting unit 23 penetrates into the column 210 and is emitted toward the connecting member 220. At this time, since the joint 224 of the fixing member 230 and the lower surface 222 does not overlap with the projection area 223, the penetrating body is inserted into the column. The light that is incident on the connecting member 220 in 210 will be reflected back into the light mixing space without leaking through the backing plate 22.

Referring to FIG. 4, FIG. 4 is a cross-sectional view showing a supporting device according to another preferred embodiment of the present invention. The supporting device 200 shown in FIG. 2 is taken as an example and slightly modified. The supporting device 300 also has a cylinder 310, a connecting member 320 and a fixing member 330. The cylindrical body 310 has two and is disposed on the upper surface of the connecting member 320. Similarly, the fixing member 330 has two and is disposed at the connecting member 320. The lower surface, and the junction of the fixing member 330 and the connecting member 320, is located outside the projection area of the pillar 310 projected on the connecting member 320 along the normal direction of the connecting member 320. In other embodiments, there may be only one fixing member and one cylinder, or two cylinders and only one fixing member, or more than two of the cylinder and the fixing member, or the cylinder and the fixing. More than two pieces. The focus is on the connection between the fixing member and the connecting member, and the projection area of the column projected on the connecting member in the normal direction of the connecting member, which do not overlap each other.

Please refer to FIG. 5 , which is a top view of a column of a plurality of preferred embodiments of the present invention. FIG. 5 is an example of the supporting device 200 shown in FIG. 2 , and is shown in the above manner. Different aspects of the cylinder. The cylinder 210a of the first (a) diagram of Fig. 5 has a prismatic structure, so that the area of the top portion 211a is smaller than that of the bottom surface 212a. The cylinder 210b of Fig. 5(b) is a truncated cone structure, so that the area of the top portion 211b is smaller than that of the bottom surface 212b. In other embodiments, the cylinder may also be a prismatic structure or a cylindrical structure, that is, the top and bottom surfaces of the cylinder have the same size, and the top of the cylinder may be a flat surface, a convex surface or a concave surface.

Please refer to FIG. 6. FIG. 6 is a top view of the connecting member of the preferred embodiment of the present invention. FIG. 6 is an example of the supporting device 200 shown in FIG. 2, and is shown in the above manner. Different aspects of the connector, Figures (a) through (f) of Figure 6 are top views of the connector, which corresponds to the shape of the projection surface of the connector projected onto the backing plate along the normal direction of the backing plate. 6 is a circular view of the connecting member 220a; FIG. 6 is a rectangular view of the connecting member 220b of FIG. 6; FIG. 6 is a top view of the connecting member 220c of FIG. The top view of the connecting members 220d, 220e, 220f of the (d), (e) and (f) views of Fig. 6 is irregular.

Please refer to FIG. 7. FIG. 7 is a cross-sectional view showing a supporting device according to still another preferred embodiment of the present invention. The support device 200 shown in FIG. 2 is taken as an example and slightly modified. The support device 400 includes a post 410, a connecting member 420 and a fixing member 430. The post 410 is coupled to the upper surface of the connecting member 420, the fixing member 430 is coupled to the lower surface of the connecting member 420, and the fixing member 430 includes a hook. 431 and the positioning post 432, the hook 431 and the positioning post 432 cooperate with the corresponding positioning holes on the back plate to achieve the fixing and orientation function of the supporting device. The orientation function described above means that the side of the cylinder is oriented corresponding to the illumination unit, for example, the cylinder has a square prism structure and has four sides, and the four illumination units are respectively disposed on the bottom of the four sides. On the line, it is good for eliminating shadows. In other embodiments, a single or a plurality of fixing members having a hook and a positioning post may be used, or a plurality of fixing members having only a hook (as shown in FIGS. 2 to 4) may be used for fixing. With the purpose of orientation.

In summary, the present invention is a supporting device used in a backlight module or a light mixing device to eliminate the shadow caused by the supporting device itself, and to prevent the light of the light emitting unit from leaking through the column and the fixing member of the supporting device. At the same time, it can reduce costs without reducing overall brightness.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and anyone skilled in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of protection is subject to the definition of the scope of the patent application.

200‧‧‧Support device

210‧‧‧Cylinder

211‧‧‧ top

212‧‧‧ bottom

220‧‧‧Connecting parts

221‧‧‧ upper surface

222‧‧‧ lower surface

223‧‧‧Projection area

224‧‧‧ Connection

230‧‧‧Fixed parts

Claims (10)

A support device comprising:
a cylinder having a bottom surface;
a connecting member having an upper surface and a lower surface, the upper surface having an area larger than an area of the bottom surface, the upper surface being connected to the bottom surface, the bottom surface being projected on the lower surface along a normal direction of the lower surface a projection area; and a fixing member connecting the lower surface, the fixing member and the lower surface are not overlapped with the projection area. The support device of claim 1, wherein the column has a light transmittance greater than or equal to 50%. The support device of claim 1, wherein the upper surface of the connecting member is a flat surface, a convex surface or a concave surface, and the upper surface may further be provided with a light diffusing microstructure or a light reflecting coating. . The support device of claim 1, wherein the lower surface of the connecting member is a flat surface, a convex surface or a concave surface, and the lower surface may further be provided with a light diffusing microstructure or a light reflecting coating. . The support device of claim 1, wherein the projection area is a plane, a convex surface or a concave surface, and the projection area may further be provided with a light diffusion microstructure or a light reflective coating. The support device of claim 1, wherein the fixing member comprises a positioning post and a hook. The support device according to claim 1, wherein the number of the fixing members is two or more, and/or the number of the columns is two or more. The supporting device according to claim 1, wherein the column is a prismatic structure, a prismatic structure, a truncated cone structure or a cylindrical structure, and the column has a top portion facing away from the connecting member, the top having a top Plane, convex or concave. The supporting device according to claim 1, wherein a projection surface of the connecting member is circular, rectangular, triangular or irregular. The support device of claim 1, wherein the column, the connecting member and the fixing member are integrally formed.