TWI602494B - Pcb fastening structure and display device having the same - Google Patents

Description

Circuit board fixed structure and board fixed structure Display device

The present invention relates to a circuit board fixing structure and a display device having the circuit board fixing structure.

A conventional liquid crystal display device includes a backlight module and a liquid crystal display panel on the backlight module. The flexible circuit board (FPC) electrically connects the liquid crystal display panel to the source circuit board (Source PCB; SPCB). In order to prevent electromagnetic interference (EMI) and electrostatic discharge (ESD) problems, designers usually electrically connect the source board to the back panel of the backlight module to ground the SPCB to avoid electromagnetic interference and electrostatic discharge. In the prior art, the SPCB is mounted on the side of the backlight module, and the conductive cloth is disposed between the SPCB and the back board to electrically connect the SPCB and the back board to ground the SPCB.

The method of fixing the SPCB is, for example, using an additional support member disposed at a position opposite to the conductive cloth of the SPCB, and pressing the support member with the front frame of the backlight module, so that the SPCB presses the conductive cloth and electrically connects the back plate. However, this method requires the use of a conductive cloth and a plurality of support members to increase the cost of the backlight module. When the current frame presses the support member, the support member may fall, and the function of the SPCB is still lost. In dimension After repairing or heavy work, the conductive cloth and the support member may not be reused, which makes the yield of the backlight module difficult to increase.

For another example, the SPCB can be fixed on the hook of the backlight module frame. Ground the SPCB and the backplane with a conductive cloth. However, this method also requires the use of a conductive cloth to increase the cost of the backlight module. After repair or rework, the conductive cloth may not be reused, making it difficult to increase the yield of the backlight module. In addition, some of the hooks are located above the SPCB on the top surface of the SPCB, and the other part of the hooks are located below the SPCB against the bottom surface of the SPCB, so it is not easy to install and will increase the time for assembling the SPCB.

One aspect of the present invention is a circuit board fixing structure.

According to an embodiment of the present invention, a circuit board fixing structure includes a first frame, a second frame, a clamping structure, and a circuit board. The first frame has a limit bump. The limit bumps are located on the side walls of the first frame. The second frame is located on the first frame. The clamping structure projects from the second frame along the sidewall surface. The clamping structure comprises a body portion, a support portion and a hook portion. The body portion is coupled to the second frame. The body portion has a hollowed out area. The limit bumps protrude from the cutout. The support portion is located at one end of the body portion away from the second frame. The hook portion is connected to the support portion. The hook portion has a free end that is away from the support portion. The orthographic projection of the hook portion on the side wall at least partially overlaps the orthographic projection of the hollowed out region on the side wall. The circuit board is positioned between the limiting bump, the support portion and the hook portion, and a vertical distance between the floating end and the support portion is greater than or equal to a width of the circuit board.

Another aspect of the present invention is a display device.

According to an embodiment of the invention, a display device includes a display Panel, circuit board fixed structure and flexible circuit board. The circuit board fixing structure includes a first frame, a second frame, a clamping structure and a circuit board. The first frame has a limit bump. The limit bumps are located on the side walls of the first frame. The second frame is located on the first frame and carries the display panel. The clamping structure projects from the second frame along the sidewall surface. The clamping structure comprises a body portion, a support portion and a hook portion. The body portion is coupled to the second frame. The body portion has a hollowed out area. The limit bumps protrude from the cutout. The support portion is located at one end of the body portion away from the second frame. The hook portion is connected to the support portion. The hook portion has a free end that is away from the support portion. The orthographic projection of the hook portion on the side wall at least partially overlaps the orthographic projection of the hollowed out region on the side wall. The circuit board is positioned between the limiting bump, the support portion and the hook portion, and a vertical distance between the floating end and the support portion is greater than or equal to a width of the circuit board. The flexible circuit board is electrically connected to the display panel and the circuit board.

In the above embodiment of the present invention, the first frame has a limit convex And the body portion of the clamping structure has a hollowed out area, such that the limiting protrusion can protrude from the hollowed out area. Since the orthographic projection of the hook portion on the side wall of the first frame at least partially overlaps with the orthographic projection of the hollow region on the side wall of the first frame, when the circuit board is inserted into the support from the gap between the suspended end of the hook portion and the body portion When the portion is bounded, the limiting protrusion of the first frame can abut the circuit board, so that the circuit board is positioned between the limiting protrusion, the supporting portion and the hook portion. In addition, the vertical distance between the suspended end of the hook portion and the support portion is greater than or equal to the width of the circuit board, and the fixing property to the circuit board is further enhanced.

The circuit board fixing structure of the invention can be supported by a limit bump and a hook The positioning circuit board allows the circuit board to abut against the limit bumps to achieve the grounding effect, without using an additional support member to press the circuit board, and does not need to use an additional conductive cloth to ground the circuit board.

100‧‧‧Circuit board fixing structure

110‧‧‧ first frame

111‧‧‧ side wall

112‧‧‧ Limit bumps

120‧‧‧second framework

130‧‧‧Clamping structure

131‧‧‧Extension

132‧‧‧ Body Department

133‧‧‧镂空区

134‧‧‧Support

135‧‧‧ hangover

136‧‧‧K hook section

137‧‧‧ Groove

138‧‧‧Guideboard

139a‧‧‧ first side

139b‧‧‧ second side

140‧‧‧ boards

142‧‧‧ first side

144‧‧‧ second side

145‧‧ ‧ gap

146‧‧‧ Grounding mat

200‧‧‧ display device

210‧‧‧ display panel

220‧‧‧Soft circuit board

240‧‧‧Backlight module

1B-1B‧‧‧ line segment

4-4‧‧‧ segments

H‧‧‧Vertical distance

W‧‧‧Width

D1‧‧‧ vertical distance

D2‧‧‧ thickness

D3, d4‧‧‧ vertical distance

FIG. 1A is a perspective view of a display device according to an embodiment of the present invention.

Fig. 1B is a cross-sectional view showing the display device of Fig. 1A along line segment 1B-1B.

FIG. 2 is a partially enlarged view showing the fixing structure of the circuit board of FIG. 1A.

Fig. 3 is a perspective view showing the circuit board fixing structure of Fig. 2 with the circuit board omitted.

Figure 4 is a cross-sectional view of the circuit board fixing structure of Figure 2 taken along line 4-4.

Fig. 5 is a schematic view showing the circuit board of Fig. 2.

Fig. 6 is a view showing another view of the circuit board fixing structure of Fig. 2.

Fig. 7 is a perspective view showing the circuit board and the flexible circuit board of Fig. 1A.

The embodiments of the present invention are disclosed in the following drawings, and the details of However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

FIG. 1A is a perspective view of a display device 200 according to an embodiment of the present invention. FIG. 1B is a diagram showing the display device of FIG. 1A along line segment 1B-1B Sectional view. Referring to FIGS. 1A and 1B, the display device 200 includes a display panel 210, a circuit board fixing structure 100, and a flexible circuit board 220. The display panel 210 can be a liquid crystal panel, but is not limited thereto. The circuit board fixing structure 100 includes a first frame 110, a second frame 120, a clamping structure 130, and a circuit board 140. The first frame 110 carries a backlight module 240. The second frame 120 is located on the first frame 110 and carries the display panel 210, and the second frame 120 surrounds the edge of the first frame 110.

FIG. 2 is a partial enlarged view of the circuit board fixing structure 100 of FIG. 1A. In this embodiment, the clamping structure 130 is disposed along the surface of the sidewall 111 of the first frame 110 and protrudes from the second frame 120. The clamping structure 130 includes a body portion 132, a support portion 134 and a hook portion 136. The body portion 132 of the clamping structure 130 is coupled to the second frame 120. The support portion 134 is located at one end of the body portion 132 away from the second frame 120. The hook portion 136 is coupled to the support portion 134. The hook portion 136 has a floating end 135 away from the support portion 134, and the vertical distance H between the floating end 135 and the support portion 134 is greater than or equal to the width W of the circuit board 140, so that the circuit board 140 can be fixed to the hook in the vertical direction. Within section 136.

In addition, the flexible circuit board 220 is electrically connected to the display panel 210 and the circuit board 140 for transmitting signals.

FIG. 3 is a perspective view showing the circuit board fixing structure 100 of FIG. 2 omitting the circuit board 140. Referring to FIGS. 2 and 3 simultaneously, the first frame 110 of the circuit board fixing structure 100 has a limiting bump 112. The limiting bump 112 is located on the sidewall 111 of the first frame 110. When the first frame 110 is fabricated, the limiting protrusion 112 and the side wall 111 may be integrally formed, but not limited thereto. The body portion 132 of the clamping structure 130 has a hollowed out area 133, and the position of the hollowed out area 133 corresponds to the limiting protrusion 112. The position is such that the limit bump 112 can protrude from the cutout 133.

In addition, the hook portion 136 of the clamping structure 130 is positive on the side wall 111 The projection and the orthographic projection of the hollowed out region 133 of the body portion 132 at least partially overlaps the sidewall 111. In such a design, after the circuit board 140 is inserted into the support portion 134 from the gap between the floating end 135 of the hook portion 136 and the body portion 132, the circuit board 140 can be positioned on the limiting protrusion 112, the support portion 134 and the hook Between the sections 136. Therefore, the circuit board 140 can be pressed against the limiting bump 112 by the hook portion 139.

In the following description, the state when the circuit board 140 is positioned will be described in detail.

4 is a cross-sectional view of the circuit board fixing structure 100 of FIG. 2 taken along line 4-4. Referring to FIGS. 2 and 4, the limiting protrusion 112 of the first frame 110 protrudes from the cutout portion 133 in the direction of the hook portion 136. When the circuit board 140 is located between the limiting protrusion 112 and the supporting portion 134 and the hook portion 136, the limiting protrusion 112 and the hook portion 136 can respectively abut on opposite sides of the circuit board 140 to prevent the circuit board 140 from moving. . In addition, since the vertical distance H between the hanging end 135 of the hook portion 136 and the support portion 134 is greater than or equal to the width W of the circuit board 140, the circuit board 140 can be fixed in the vertical direction in the hook portion 136.

In this embodiment, the material of the first frame 110 may be metal, and the limiting bumps 112 may be conductive materials. The limiting block 112 and the first frame 110 may be integrally formed metal parts, but not limited thereto. When the circuit board 140 is in contact with the limiting bumps 112, the grounding pads (not shown) of the circuit board 140 can be electrically connected to the first frame 110 through the limiting bumps 112 to achieve the grounding effect.

Therefore, the circuit board fixing structure 100 of the present invention can not only use the limiting bump 112 and the hook portion 136 to position the circuit board 140, but also by the limiting bump. 112 abuts the circuit board 140 to ground the circuit board 140. The circuit board fixing structure 100 does not need to use an additional support member to position the circuit board 140, and does not need to use an additional conductive cloth to ground the circuit board 140, and the limiting protrusion 112 and the first frame 110 can be integrally formed, and the clamping structure The 130 and the second frame 120 may also be integrally formed, thereby saving material cost and assembly time. In addition, the circuit board 140 is detachably positioned between the limiting protrusion 112, the supporting portion 134 and the hook portion 136, so that it is easy to repair or rework, and the yield can be improved.

In this embodiment, the material of the second frame 120 may be plastic. The glue makes the hook portion 136 elastic. The vertical distance d1 between the limiting bump 112 and the hook portion 136 is less than or equal to the thickness d2 of the circuit board 140 to ensure that the circuit board 140 can abut the limiting bump 112 and the hook portion 136. When the thickness d2 of the circuit board 140 is greater than the vertical distance d1, the elastic hook portion 136 can tightly press the circuit board 140 against the limiting protrusion 112, so that not only the circuit board 140 can be fixed more firmly, but also can be avoided. The circuit board 140 leaves the limit bump 112 and is poorly grounded.

The clamping structure 130 can also include an extension 131. Extension 131 The support portion 134 is connected, and the extension portion 131 and the hook portion 136 respectively extend in opposite directions. The extension 131 has a recess 137. The groove 137 is located at the junction of the extension portion 131 and the support portion 134, and the groove 137 extends from the edge of the hook portion 136 away from the hook portion 136. When the circuit board 140 is located between the limiting protrusion 112 and the hook portion 136, the extension portion 131 and the groove 137 thereof are designed to disperse the stress at the connection with the support portion 134 when the hook portion 136 is pulled, thereby preventing The joint breaks.

The free end 135 of the hook portion 136 can also have a guide plate 138. guide The lead plate 138 has a first side 139a adjacent to the circuit board 140 and a second side 139b remote from the circuit board 140. The vertical distance d3 between the first side 139a and the first frame 110 It is smaller than the vertical distance d4 between the second side 139b and the first frame 110. That is, the guide plate 138 is inclined to facilitate insertion of the circuit board 140 into the gap from the free end 135 of the hook portion 136. In addition, the first side 139a of the guiding plate 138 protrudes in the direction of the hollow region 133, so that the circuit board 140 can be prevented from being easily detached from the hanging end 135 of the hook portion 136.

It should be understood that in the following description, the component materials have been described The connection relationship with the components will not be repeated, and will be described first. In the following description, the design of the circuit board 140 will be explained.

FIG. 5 is a schematic diagram of the circuit board 140 of FIG. 2. Figure 6 Another perspective of the circuit board mounting structure 100 of FIG. 2 is shown. Referring also to FIGS. 5 and 6, the circuit board 140 has a first side 142 and a second side 144 opposite thereto. The first side 142 of the circuit board 140 abuts the support portion 134 of the clamping structure 130 , and the second side 144 of the circuit board 140 has a notch 145 . The position of the notch 145 corresponds to the position of the free end 135 of the hook portion 136, and in the present embodiment, the protruding portion of the guiding plate 138 in the direction of the hollowed out region 133 (see FIG. 4) is located in the notch 145 of the circuit board 140. The circuit board 140 can be prevented from moving away from the clamping structure 130 along the support portion 134. That is, the notch 145 of the circuit board 140 can enhance the ability of the free end 135 of the hook portion 136 to position the circuit board 140 in the horizontal direction.

Figure 7 shows the circuit board 140 and the flexible circuit board of Figure 1A A perspective view of 220. Referring to FIG. 4 and FIG. 7 simultaneously, the circuit board 140 is electrically connected to the flexible circuit board 220. Circuit board 140 may also include a ground pad 146. When the circuit board 140 is positioned between the limiting protrusion 112, the supporting portion 134 and the hook portion 136, the grounding pad 146 of the circuit board 140 can be used to abut the limiting protrusion 112 of the first frame 110 to reach the ground. effect.

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‧‧‧Circuit board fixing structure

110‧‧‧ first frame

111‧‧‧ side wall

120‧‧‧second framework

130‧‧‧Clamping structure

131‧‧‧Extension

132‧‧‧ Body Department

133‧‧‧镂空区

134‧‧‧Support

135‧‧‧ hangover

136‧‧‧K hook section

137‧‧‧ Groove

140‧‧‧ boards

142‧‧‧ first side

144‧‧‧ second side

145‧‧ ‧ gap

4-4‧‧‧ segments

H‧‧‧Vertical distance

W‧‧‧Width

Claims (11)

A circuit board fixing structure comprising: a first frame having a limiting protrusion on a side wall of the first frame; a second frame on the first frame; and a clamping structure along the side wall surface The second frame protrudes, the clamping structure comprises: a body portion connecting the second frame, the body portion has a hollowed out area, the limiting protrusion protrudes from the hollowed out area; and a supporting portion is located on the body a portion away from the one end of the second frame; and a hook portion connected to the support portion and having a hanging end away from the supporting portion, the orthographic projection of the hook portion on the side wall and the hollow portion on the side wall The orthographic projections at least partially overlap; and a circuit board positioned between the limiting bumps, the supporting portion and the hook portion, and a vertical distance between the floating end and the supporting portion is greater than or equal to the circuit board width. The circuit board fixing structure of claim 1, wherein the circuit board has a first side opposite to a second side, the first side abuts the supporting portion, and the second side has a The notch, the hanging end of the hook portion has a guiding plate, and the protruding portion of the guiding plate in the direction of the hollow region is located in the notch. The circuit board fixing structure of claim 1, wherein a vertical distance between the limiting bump and the hook portion is less than or equal to the circuit board thickness. The circuit board fixing structure of claim 1, wherein the hanging end of the hook portion has a guiding plate having a first side adjacent to the circuit board and a second one away from the circuit board a side, a vertical distance between the first side and the first frame is less than a vertical distance between the second side and the first frame. The circuit board fixing structure of claim 4, wherein the first side of the guiding plate protrudes in a direction of the hollowed out area. The circuit board fixing structure of claim 1, wherein the clamping structure further comprises an extending portion that connects the supporting portion and the extending portion and the hook portion respectively extend in opposite directions. The circuit board fixing structure of claim 6, wherein the extending portion has a recess, and the recess is located at a joint of the extending portion and the supporting portion, and is away from the hook by an edge of the hook portion The direction of the department extends. The circuit board fixing structure of claim 1, wherein the circuit board further comprises a ground pad abutting the limiting bump. The circuit board fixing structure of claim 1, wherein the limiting protrusion and the first frame are integrally formed metal parts. The circuit board fixing structure of claim 1, wherein the first frame is made of metal, and the limiting protrusion is a conductive material. A display device comprising: a display panel; a circuit board fixing structure comprising: a first frame, the first frame having a limiting protrusion located on one side wall of the first frame; and a second frame located at the first The display panel is mounted on a frame; a clamping structure is protruded from the second frame along the sidewall surface, the clamping structure comprises: a body portion connecting the second frame, the body portion having a hollowed out region The limiting protrusion protrudes from the hollow area; a supporting portion is located at one end of the body portion away from the second frame; and a hook portion is connected to the supporting portion and has a hanging end away from the supporting portion The front projection of the hook portion at the side wall at least partially overlaps with the orthographic projection of the cutout region on the sidewall; and a circuit board positioned between the limiting bump, the support portion and the hook portion, and The vertical distance between the floating end and the support portion is greater than or equal to the width of the circuit board; and a flexible circuit board electrically connecting the display panel and the circuit board.