TWI426331B - Flat panel display and backlight module of the same - Google Patents

Description

Flat display and backlight module

The present invention relates to a backlight module, and more particularly to a backlight module for a flat panel display.

For the assembly process of a flat panel display, space configuration is an extremely important issue in order to assemble many components in a preset space. In the case of a backlight module, the backlight module has a plurality of tubes and light guiding members. If the tube is to be grounded, the tube is usually connected to the ground potential by soldering. However, during the welding process, welding defects such as empty welding and virtual welding may occur, and the lamp may not be properly grounded, and the lamp may not operate as expected.

Or, if the solder joint is too large, when the backlight module is assembled, it may be pressed to the solder joint itself or pulled to the wire connected to the solder joint, so that the lamp cannot be properly grounded, and the charge is improperly accumulated and dangerous. .

Therefore, in order to improve the aforementioned shortcomings, it is necessary to improve the conventional flat panel display according to the structure and assembly process of the backlight module to avoid the trouble and danger that may be caused by improper soldering.

One aspect of the present invention provides a backlight module that uses a chip-shaped grounding member to electrically connect the conductive member to the backplane ground, thereby substantially avoiding various problems caused by soldering.

According to an embodiment of the invention, a backlight module includes at least one light source, a back plate, a conductive member, and a grounding member. Wherein, the conductive member is electrically connected to the negative electrode end of the light source. The grounding member is composed of a sheet-like body, and the grounding member is electrically connected to the conductive member and the backing plate.

Another aspect of the present invention provides a flat panel display.

According to another embodiment of the present invention, a flat panel display includes a display module and a backlight module. The backlight module faces the display module, and the backlight module comprises at least one light source, a back plate, a conductive component and a grounding component. Wherein, the conductive member is electrically connected to the negative electrode end of the light source. The grounding member is composed of a sheet-like body, and the grounding member is electrically connected to the conductive member and the backing plate.

In view of the various problems that may result from soldering, the following embodiments of the present invention will ground the illumination source in a solderless connection. That is, the backlight module will no longer use the solder to electrically connect the light source to the ground potential, but use a sheet-like grounding member to ground the light source.

FIG. 1 is an exploded view of a flat panel display 100 in accordance with an embodiment of the present invention. As shown, a flat panel display 100 includes a display module 110 and a backlight module 120. The backlight module 120 faces the display module 110 , and the backlight module 120 includes a light source 122 , a back plate 130 , a conductive member 140 , and a ground member 150 . The conductive member 140 is electrically connected to the negative electrode end 123 of the light source 122. The grounding member 150 is composed of a sheet-like body, and the grounding member 150 electrically connects the conductive member 140 and the backing plate 130.

2 is a side view of the flat panel display 100 of FIG. 1 after being assembled to the portion of the grounding member 150. As shown, the grounding member 150 of the present embodiment can have a fastening zone 154 and an elastic zone 152. The fastening area 154 is fixed to the back plate 130. The elastic region 152 can be coupled to the fastening region 154 and elastically contacts the conductive member 140. As a result, the conductive member 140 and the back plate 130 will be electrically connected together by the grounding member 150 such that the negative electrode terminal of the light source is electrically connected to the ground potential (for example, the back plate 130).

Specifically, the material of the elastic region 152 may be an elastic material, and the elastic region 152 may be designed to interfere slightly with the conductive member 140 such that the elastic region 152 can reliably resist the conductive member 140. The micro-interference described above means that the vertical distance between the conductive member 140 and the back plate 130 is slightly smaller than the height of the elastic region 152, so that after the flat display 100 is assembled, the elastic region 152 will be slightly compressed.

That is to say, the grounding member 150 of the present embodiment contacts the conductive member 140 by elastic contact, so that there is no solder joint between the grounding member 150 and the conductive member 140, and various problems caused by soldering can be surely avoided. For example, poor solder joints or excessive solder joint volume make the backlight module difficult to assemble.

The specific structure of the elastic zone 152 can be appropriately adjusted according to different assembly requirements. Taking FIG. 2 as an example, the elastic region 152 may have two elastic arms 151 disposed opposite to each other. One end of the elastic arms 151 is extended to the fastening region 154, and the other end contacts the conductive member 140. During the assembly of the flat panel display 100, the elastic arm 151 will be slightly deformed by the compression of the conductive member 140 to ensure that the elastic arm 151 can positively electrically contact the conductive member 140.

Although the second drawing shows a partial shape of the elastic region 152 in a convex arc shape, this does not limit the present invention, and other similar shapes (for example, concave curved shape, circular arc shape, elliptical curved shape, curved shape) It can also be applied as the shape of the elastic zone 152, wavy or zigzag. Those having ordinary knowledge in the technical field to which the present invention pertains should flexibly select an embodiment of the elastic region 152 depending on actual needs.

As shown in FIG. 2, the manufacturer can lock the fastening zone 154 to the backing plate 130 by screws 160 during actual assembly. However, this does not limit the invention, and other suitable fasteners, such as rivets, may also be used to secure the fastening zone 154 to the backing plate 130.

The elastic zone 152 and the fastening zone 154 of the present embodiment can be integrally formed. More specifically, the elastic region 152 and the fastening region 154 may be made of metal (for example, spring steel) so as to be manufactured by press forming. It should be understood that the above-mentioned materials and manufacturing methods are merely illustrative and are not intended to limit the present invention. Those skilled in the art to which the present invention pertains can select suitable materials and manufacturing methods according to specific needs.

In the present embodiment, the light source 122 of Fig. 1 may be a cold cathode fluorescent tube (CCFL). These cold cathode lamps are arranged in the direction of arrow A, and these cold cathode lamps each have a positive electrode end and a negative electrode end 123. The conductive members 140 may extend along the direction in which the light sources 122 are arranged, that is, in the direction of the arrow A, to electrically connect the negative electrode ends 123 of the light sources 122 together.

The material of the conductive member 140 of the present embodiment may be copper. However, this does not limit the invention, and other similar conductive materials (for example, metal or silver) can also be applied as the material of the conductive member 140. Those having ordinary knowledge in the technical field to which the present invention pertains should be flexibly selected according to actual needs.

In addition, the display module 110 can include a liquid crystal panel 112 and an optical film. In the present embodiment, the optical film described above may be, for example, a pair of polarizers 114. The polarizers 114 may be respectively disposed on both sides of the liquid crystal panel 112 to adjust the polarization state of the light.

In addition to the grounding member 150 illustrated in FIG. 2, other suitable sheet-like conductive members (for example, conductive tape) can also be applied as the grounding member. The third figure will be taken as an example to specifically explain the above technical contents.

FIG. 3 is a side elevational view of the flat panel display 100 in accordance with another embodiment of the present invention. This embodiment differs from the previous embodiment in that the conductive tape 170 is used as a grounding member in the present embodiment. Specifically, the conductive tape 170 described above can be adhered to the conductive member 140 and extended and fixed to the back plate 130. That is, in the present embodiment, the grounding member 150 of Fig. 1 is replaced with a conductive tape 170. At the time of assembly, the manufacturer can reliably electrically connect the negative electrode end of the light source to the ground potential (for example, the back plate 130) by simply adhering the conductive tape 170 to the conductive member 140 and the back plate 130.

In the embodiment, the conductive tape 170 described above may be an aluminum foil tape. However, this does not limit the present invention. Other types of conductive tapes, such as conductive cloth tapes, can also be used to electrically connect the conductive members 140 and the back plate 130. Those having ordinary knowledge in the technical field to which the present invention pertains should be flexibly selected according to actual needs.

As for other components in the flat panel display of the present embodiment, since the detailed structure thereof is the same as that of the previous embodiment, the description thereof will not be repeated.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100. . . Flat panel display

110. . . Display module

112. . . LCD panel

114. . . Polarizer

120. . . Backlight module

122. . . Light source

123. . . Negative electrode end

130. . . Backplane

140. . . Conductive component

150. . . Grounding component

151. . . Boom arm

152. . . Elastic zone

154. . . Fixed area

160. . . Screw

170. . . Conductive tape

A. . . arrow

FIG. 1 is an exploded view of a flat panel display according to an embodiment of the present invention.

Fig. 2 is a side elevational view of the flat panel display of Fig. 1 after being assembled to the grounding member portion.

3 is a side view of a flat panel display in accordance with another embodiment of the present invention.

100. . . Flat panel display

110. . . Display module

112. . . LCD panel

114. . . Polarizer

120. . . Backlight module

122. . . Light source

123. . . Negative electrode end

130. . . Backplane

140. . . Conductive component

150. . . Grounding component

151. . . Boom arm

152. . . Elastic zone

154. . . Fixed area

160. . . Screw

A. . . arrow

Claims (9)

A backlight module includes: a plurality of illumination sources arranged along an alignment direction, and each of the illumination sources has a negative electrode end; a back plate; a conductive member extending along the alignment direction to electrically Connecting the negative electrode ends of the light source; and a grounding member is formed by a sheet body electrically connected to the conductive member and the back plate. The backlight module of claim 1, wherein the grounding member comprises: a fastening region fixed to the back plate; and an elastic region connecting the fastening region and elastically contacting the conductive member. The backlight module of claim 2, wherein the elastic region comprises: two elastic arms disposed opposite each other, one end of the elastic arms extendingly connected to the fastening region, and the other end contacting the conductive member. The backlight module of claim 2, wherein the elastic region is integrally formed with the fastening region. The backlight module of claim 1, wherein the grounding component comprises: A conductive tape is adhered to the conductive member and extended to the back plate. The backlight module of claim 1, wherein the grounding member comprises: an aluminum foil tape adhered to the conductive member and extended to the back plate. A flat panel display comprising: a display module; and a backlight module facing the display module, wherein the backlight module comprises: a plurality of illumination sources arranged along an alignment direction, and each of the illumination sources Having a negative electrode end; a backing plate; a conductive member extending along the alignment direction to electrically connect the negative electrode ends of the light source; and a grounding member formed by a piece of ground The component is electrically connected to the conductive component and the backboard. The flat panel display of claim 7, wherein the grounding member comprises: a fastening region fixed to the backboard; and an elastic region connecting the fastening region and elastically contacting the conductive member. The flat panel display of claim 7, wherein the grounding member comprises: a conductive tape adhered to the conductive member and extending and fixed to the back plate.