CN201063085Y - Adhesive tape of direct type backlight module - Google Patents

Abstract

A rubber strip of a direct type backlight module is arranged above a back plate of the direct type backlight module and is parallel to a plurality of backlight sources. The adhesive tape at least comprises: the base is a columnar body and at least provided with a bottom surface and two side surfaces which are parallel to the backlight sources and are connected with two sides opposite to the bottom surface, and the two side surfaces are provided with common sides and used for reflecting light rays generated by the backlight sources; a thimble, wherein the thimble is disposed on the common side of the two sides and is used to support the diffusion plate above the light sources; and at least one backlight source fixing structure, wherein each backlight source fixing structure at least comprises: a support arm connected to the base and extending out of the base, and an arc-shaped base with an upward opening. The utility model discloses a straight following formula backlight module's adhesive tape utilizes the base that has the plane of reflection in order to increase brilliance and improve optical appearance to utilize the thimble can effectively support the diffuser plate, more utilize an at least backlight fixed knot to construct and can fix the backlight and avoid the backlight crooked.

Description

Adhesive strip for direct-lit backlight module

technical field

The utility model relates to a rubber strip for a direct-type backlight module, in particular to a rubber strip with the functions of fixing a backlight source, supporting a diffusion plate and improving optical appearance.

Background technique

In the past, products used in large liquid crystal displays (Liquid Crystal Display; LCD) were mainly notebook computers (Note Book Personal Computer) and desktop LCD monitors (LCDMonitor), and the required characteristics of the backlight module were mainly light weight and volume Small and thin. Therefore, when developing backlights for LCD TVs, it is necessary to consider sufficient display brightness (at least 450cd/m2 or more), wide viewing angles (currently sold product specifications can reach 170°), vivid Excellent image contrast ratio (currently LCD TV products are about 500:1; plasma TV products are about 1000:1) and standard service life (current product test value is about 60,000 hours). Considering the above specifications, the direct-type backlight module has become the mainstream technology for large-scale LCD TVs. The main concept of its design is to meet the demand for higher brightness and reduce the weight and thickness of the module. The light source is a direct-type line light source that disperses the light evenly, transforming the light into a flat light source, and then enters the technical mode of the LCD panel.

The direct-type backlight module provides the back light source in the LCD. Since the performance of the direct-type backlight module will directly affect the quality of the LCD, it is a very important component in the LCD module. Generally speaking, a direct-lit backlight module is composed of a diffuser, a light guide plate, several backlight sources, and a reflector. The purpose of the light guide plate is to guide the light into a plane to ensure the uniformity of the brightness of the panel. The backlight must have the characteristics of high brightness and long life, so the currently available backlights include cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp; CCFL) and hot cathode fluorescent lamp, light emitting diode (LED), electroluminescence (EL) etc. Among them, CCFL is the mainstream. When the thickness of the direct-type backlight module is thinner, since several backlight sources are arranged in sequence directly under the light guide plate, the outline of the backlight sources can easily cause brightness unevenness and shadows on the LCD screen. Therefore, the commonly used improvement method is to install a diffuser or adjust the shape of the diffuser to diffuse the light passing through the light guide plate, try to eliminate the shadow of the backlight and make the brightness of the picture more uniform. As for the reflector, it can prevent the light emitted from the backlight from leaking out and improve the efficiency of light use.

Please refer to FIG. 1 , which is a perspective view of a part of a direct-lit backlight module in the prior art. Taking the direct-lit backlight module with 12 to 16 line light sources currently used in 23-inch to 30-inch LCD TVs as an example, the internal support structure near the backlight source 101 includes at least one thimble 103 and several O-rings 105, wherein the thimble 103 is used to prevent the upper diffusion plate (not shown in the figure) from sagging, and at the same time, the backlight 101 is covered with an O-ring 105 to prevent the backlight 101 from bending downwards and contacting the lower backplane 107, wherein the backlight 107 The material can be aluminum, for example, and the back plate 107 is used as a reflection plate.

However, in the support structure near the above backlight 101, since a direct type backlight module only has one thimble 103 to support the diffusion plate, the deformation position of the diffusion plate is not certain, and the effect of the thimble 103 supporting the diffusion plate is not good. Secondly, after the O-ring 105 is put on the backlight 101 , it will affect the brightness of the backlight 101 here. Furthermore, the existing O-ring 105 is only used to prevent the backlight 101 from bending downwards, but cannot prevent the backlight 101 from bending upwards or left and right.

Please refer to Fig. 2, which is a longitudinal luminance distribution diagram of a direct-lit backlight module in the prior art on a diffuser plate, wherein the vertical axis is any luminance and the horizontal axis is the vertical direction (up and down direction), and the higher value of any luminance is the location of the backlight 101 , and any lower value of luminance is the location between the backlight 101 and the backlight 101 . Because the luminance of the direct-lit backlight module in the prior art varies greatly and is uneven, the peak and brightness of any measured luminance value are more obvious, and the optical appearance of the diffusion plate presented above the backlight 101 is also less beautiful. .

Therefore, it is necessary to provide an internal support structure of the direct type backlight module near the backlight to provide better support for the diffuser, prevent the backlight from bending, and improve the optical appearance.

Contents of the invention

One of the purposes of this utility model is to disclose a rubber strip for a direct-lit backlight module. The rubber strip at least includes a base, a thimble and at least one backlight fixing structure, wherein the base has a reflective surface to increase brightness and improve the optical appearance, and the thimble It can effectively support the diffusion plate, and the backlight fixing structure can fix the backlight and prevent the backlight from bending.

According to the above purpose of the utility model, a rubber strip for a direct-type backlight module is proposed, wherein the rubber strip is arranged above the backplane of the direct-type backlight module and parallel to several backlight sources, and the rubber strip at least includes: a base , wherein the base is a columnar body and has at least a bottom surface, and two side surfaces parallel to these backlight sources and connected to two sides opposite to the bottom surface, and wherein the two sides have a common edge and the two sides are used to reflect the light generated by these backlight sources ; the thimble, wherein the thimble is arranged on the common side of the two sides, and the thimble is used to support the diffusion plate above the light sources; and at least one backlight fixing structure, wherein each backlight fixing structure at least includes: connected to the base and The support arm protruding from the side of the base, and the arc-shaped seat opening upward.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

FIG. 1 is a perspective view of a partial range of a direct-lit backlight module in the prior art;

FIG. 2 is a longitudinal luminance distribution diagram of a direct-lit backlight module on a diffuser plate in the prior art;

3 is a schematic diagram of a three-dimensional structure of a direct-lit backlight module according to a preferred embodiment of the present invention;

Fig. 4 is a three-dimensional structural diagram of a rubber strip according to a preferred embodiment of the present invention;

Fig. 5 is a sectional view showing a rubber strip according to a preferred embodiment of the present invention;

Fig. 6 is a partial side view of a rubber strip in a preferred embodiment of the present invention;

7 is a perspective view of a partial range of a direct-lit backlight module according to a preferred embodiment of the present invention;

FIG. 8 is a longitudinal luminance distribution diagram of a direct-lit backlight module on a diffuser plate according to a preferred embodiment of the present invention.

Among them, reference signs

100 direct type backlight module 101 backlight

103 Thimble 105 O-ring

107 Backplane 210 Rubber strip

211 Base 213 Side

215 side 217 common side

220 Ejector 230 Backlight Fixing Structure

231 Support arm 233 Arc seat

240 Backplane 250 Diffuser

D length

Detailed ways

Below in conjunction with accompanying drawing, structural principle and working principle of the present utility model are specifically described:

Please refer to FIG. 3 , which is a three-dimensional structural diagram of a direct-lit backlight module according to a preferred embodiment of the present invention. Taking the direct type backlight module with 12 to 16 line light sources currently used in 23-inch to 30-inch LCD TVs as an example, the direct type backlight module 200 at least includes a backplane 201 , several backlight sources 203 and several adhesive strips 210 . The material of the back plate 201 can be, for example, aluminum, and the back plate 201 is used as a reflection plate. The backlight 203 can be, for example, a CCFL. And the rubber strip 210 is parallel to the backlight 203 and located between each backlight 203, wherein the rubber strip 210 of the present invention has the functions of fixing the backlight 203, supporting the diffusion plate and improving the optical appearance. The rubber strip 210 of the present invention will be described in detail.

Please refer to FIG. 4 , which is a three-dimensional structure diagram of a rubber strip 210 according to a preferred embodiment of the present invention, wherein the rubber strip 210 at least includes: a base 211, a thimble 220 and at least one backlight fixing structure 230, wherein the rubber strip 210 can be Made of plastic with highly reflective material via injection molding. The base 211 of the adhesive strip 210 is a columnar body and has at least a bottom surface (not shown), and a side 213 and a side 215 which are parallel to the backlight 203 of FIG. 215 has a common side 217 , and the side 213 and the side 215 can be, for example, at least one plane, at least one concave curved surface, or at least one upward curved surface, etc., for reflecting the light generated by the backlight 203 in FIG. 3 . The thimble 220 of the rubber strip 210 is disposed on the common side 217 of the side 213 and the side 215 , and the thimble 220 is used to support the diffuser plate 250 above the backlight 203 in FIG. 5 . In addition, the adhesive strip 210 also has at least one backlight fixing structure 230, wherein the backlight fixing structure 230 at least includes: a support arm 231, wherein the support arm 231 is connected to the base 211 and protrudes from the base 211 to fix the arc-shaped seat 233; And the arc-shaped seat 233, wherein the arc-shaped seat 233 is connected with the support arm 231, and the arc-shaped seat 233 has an upward opening for fixing the backlight 203 and preventing the backlight 203 from bending downward, upward or left and right. The backlight fixing structure 230 of the present invention may be arranged oppositely or not, depending on requirements.

However, according to another preferred embodiment of the present invention, the rubber strip 210 of the present invention may also at least include: a base 211 and a thimble 220, wherein the characteristics of the base 211 and the thimble 220 are as described above, and will not be repeated here. In addition, according to another preferred embodiment of the present utility model, the adhesive strip 210 of the present utility model can also at least include: a base 211 and at least one backlight fixing structure 230, wherein the characteristics of the base 211 and at least one backlight fixing structure 230 are also As mentioned above, no further details are given here.

Please refer to FIG. 5 , which is a cross-sectional view of a rubber strip according to a preferred embodiment of the present invention, wherein the thimble 220 of the rubber strip 210 is used to support the diffusion plate 250 above the backlight 203, and the bottom surface 212 of the rubber strip 210 is fixed on On the backplane 201, for example, it can be fixed on the backplane 201 or connected to the backplane 201 by a connecting structure. However, those who are familiar with this technology will understand that the bottom surface 212 can be fixed on the backplane 201 in other ways, so no more details are given here. .

Please refer to Fig. 6, which is a partial side view of the rubber strip according to a preferred embodiment of the present invention, wherein the rubber strip 210 is arranged on the back plate 201, and the thimble 220 of the rubber strip 210 and the backlight fixing structure 230 can be separated from each other. The length D, wherein the length D can be adjusted according to requirements, and the utility model does not limit the size of the length D.

Please refer to FIG. 7 , which is a perspective view of part of the direct-lit backlight module according to a preferred embodiment of the present invention. Taking the direct-lit backlight module 200 with 12 to 16 line light sources currently used in 23-inch to 30-inch LCD TVs as an example, the internal support structure near the backlight 203 is provided between the backlights 203 by several adhesive strips 210 , wherein several rubber strips 210 are divided into two parts, wherein the rubber strips 210a of one part and the rubber strips 210b of the other part are parallel to each other, but the rubber strips 210b of the other part are parallel to one Part of the rubber strips 210a are placed in opposite directions to increase the area where the thimbles 220 of the rubber strips 210b support the diffuser plate 250, thereby effectively preventing the diffuser plate 250 from sinking. At the same time, the backlight 203 is covered with the backlight fixing structure 230 of the rubber strip 210 b, which can prevent the backlight 203 from bending downward, upward or left and right to contact the lower backplane 201 .

It is worth mentioning that the directions of placement of the rubber strips of the present invention are not intended to limit the present invention, and any person skilled in the art can make various changes without departing from the spirit and scope of the present invention. For example, the rubber strips of the present utility model can alternately place another part of the rubber strips 210b and a part of the rubber strips 210a one by one, or place another part of the rubber strips 210b and a part of the rubber strips 210a are otherwise staggered.

Please refer to FIG. 8 , which is a longitudinal luminance distribution diagram of a direct-type backlight module on a diffuser plate according to a preferred embodiment of the present invention, wherein the vertical axis is any luminance and the horizontal axis is the vertical direction (up and down direction), any The higher value of the luminance is the position of the backlight 203 , and the lower value of any luminance is the position between the backlight 203 and the backlight 203 . Since the adhesive strip 210 of the present invention is made of highly reflective materials, and the adhesive strip 210 also provides side surfaces 213 and 215 for reflecting the light generated by the backlight 203, the luminance of the direct type backlight module of the present invention The variation is smaller and more average, so that the peak and brightness of any measured luminance value are less obvious, and the optical appearance of the diffusion plate 250 presented above the backlight 203 is also ideal and beautiful.

It can be seen from the above-mentioned preferred embodiments of the present invention that the adhesive strip of the direct-lit backlight module of the present invention includes at least a base, a thimble and several light source fixing grooves, wherein the base has a reflective surface to increase brightness and improve brightness. Optical appearance, the thimble can effectively support the diffuser plate, and the light source fixing groove can fix the backlight and prevent the backlight from bending.

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (7)

1. the adhesive tape of a direct type backlight module is characterized in that, this adhesive tape be located at this direct type backlight module a backboard the top and be parallel to several light sources, and this adhesive tape comprises at least:

One base, wherein this base is a column, and this base has at least:

One bottom surface; And

Two side faces, wherein those parallel sided link to each other in those light sources and two limits relative with this bottom surface, and those sides have limit altogether, and wherein those sides in order to reflect the light that those light sources produce; And

At least one backlight fixed sturcture comprises at least:

One support arm, wherein this support arm is connected in this base and is gone out by this base side; And

One arcuation seat, wherein this arcuation seat is connected with this support arm, and this arcuation seat has a upward opening.

2. the adhesive tape of direct type backlight module according to claim 1 is characterized in that, the group that those sides are made up of at least one plane, at least one concave curved surface down and at least one upper convex surface.

3. the adhesive tape of direct type backlight module according to claim 2 is characterized in that, those sides are during for this at least one plane, about 45 ° an of angle of those sides and this bottom surface.

4. the adhesive tape of direct type backlight module according to claim 1 is characterized in that, this bottom surface of this adhesive tape is fastened in this backboard.

5. the adhesive tape of direct type backlight module according to claim 1 is characterized in that, this bottom surface of this adhesive tape is connected with this backboard by a syndeton.

6. the adhesive tape of direct type backlight module according to claim 1 is characterized in that, this adhesive tape is an improved plastics structural shape.

7. the adhesive tape of direct type backlight module according to claim 1 is characterized in that, also comprises a thimble at least and is located on the limit altogether of those sides, and wherein this thimble is in order to support a diffuser plate of those light source tops.

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