TWI364584B - Liquid crystal display device and back light module thereof - Google Patents

Description

P〇6l〇14SM2rTW 23673twf.doc/n IX. Description of the Invention: [Technical Field] The present invention relates to a display and a light source module thereof, and more particularly to a liquid crystal display and a backlight module thereof. [Prior Art] In today's technology, 'Liquid Crystal Display (LCD) has gradually replaced the traditional bulk cathode ray display (CRT) because of its small size and light weight. The ground is used by the public. The liquid crystal display includes a backlight module, a liquid crystal display panel (LCD panel), a circuit board connected to the liquid crystal display panel, and a metal front frame. The backlight module has a plastic frame, and the plastic frame is assembled with the metal front frame to hold the liquid crystal display panel. The circuit board is also assembled on the plastic frame, and the connection area of the circuit board is electrically connected to the metal front frame to ground the circuit board. In the above, the circuit board is usually screwed to the plastic frame, and the connection area of the circuit board is electrically connected to the metal front frame through the screw. However, such a method of grounding the circuit board with a screw may cause the image quality of the liquid crystal display to be degraded due to the screw being easily pressed against the liquid crystal display panel, and even the liquid crystal display panel may be damaged. Another method of grounding the board is to attach it to the area between the board and the metal front frame using conductive tape. However, such a method of grounding a circuit board with a conductive tape is liable to cause noise due to poor contact, which also causes a deterioration in image quality of the liquid crystal display. In addition, the conductive tape is also easily separated from the joint area. * P061014SM21TW 23673twi.doc/n [Disclosure] A back-to-back group is provided to ground the board. The grounding provides a liquid crystal display (4), and the back-stage group enables the circuit board to provide a liquid crystal display, which includes a circuit board, a liquid crystal region, and a liquid crystal display panel connected to the circuit board. The plastic frame has a first plate: 第: a second surface of the first surface, wherein the liquid crystal display panel is disposed on the second surface, and the circuit board is disposed on the second surface. Front frame and plastic frame = set t display panel. The clamping member is fixed to the plastic frame and includes a contact portion. The contact portion includes at least a bent portion where the circuit board is disposed between the shaft and the upper portion and the receiving portion. The body is in contact with the body and the body is fixed on the plastic frame and is in contact with the front frame, wherein the bending portion generates an elastic force to press the contact portion against the circuit board. Eight and water Γ — — 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实 实Molding In one embodiment of the present invention, the contact portion and the body are one embodiment of the body mountain invention, and the contact portion is the contact portion. The contact end is connected to the body, and the other end of the contact portion is in contact with the contact area. In the embodiment of the present invention, the contact portion has a -definite =' and the contact region has a second positioning structure. The fourth and the clamp structures can be engaged with each other to fix the circuit board. In an embodiment of the invention, the first positioning structure is a convex 1364584 23673twf.doc/n

P0610I4SMZ1TW block, and the second positioning structure is - groove. The invention further provides a smear and a light source. The backplane includes a board, a board, and a board, and the board is connected to the backboard body. The clamping structure includes a - = joint, wherein the contact portion includes at least - a bend j ^ and a connecting plate body 盥 contact the door of the ° ° and the connecting portion is connected between the back and the right. Board has

f is between the body and the contact portion. The contact part and the grounding two = recognize that the 3 Finance II has a spring force relative to the Wei board H, so that the contact portion presses the circuit board. Fold. P is suitable for the production of the present invention. In the embodiment, the above-mentioned clamping structure and the backing plate are one embodiment of the present invention, wherein the contact portion is the end of the contact portion of the bean and the connecting portion. Connected, and the other end of the contact is in contact with the area. In an embodiment of the invention, the connecting portion is VB, wherein

One end of the connecting portion is connected to the back plate body, and the other end of the connecting portion is connected to the contact portion. In one embodiment of the invention, the contact portion has a first positioning structure and the first positioning structure is in contact with the ground contact. In an embodiment of the invention, the connection area has a second positioning structure, and the first positioning structure and the second positioning structure are mutually engageable to fix the circuit board. In one embodiment of the invention, the first positioning structure is a bump and the second positioning structure is a recess. 7 1364584 P061014SMZ1TW 23673twf.doc/n is an embodiment of the invention. The above circuit board and the light source are electrically connected. The invention further provides a liquid crystal display comprising a front frame, a circuit board, a liquid crystal display panel and a back wire group. The circuit board has an area backlight module, a front frame, and is worn to strike the s _ 〆, and the 夹持I clamping liquid is displayed on the surface of the backlight module.

^ Board with - light source. The backplane includes a backplane body and a refreshing structure, and the liquid crystal display panel and the circuit board in the basin are located on opposite surfaces of the backplane body. The hybrid structure includes a contact portion and a contact portion of the contact portion j with the circuit board, and the contact portion includes a to-fold portion. [5 ” and the f-fold is adapted to generate an elastic force to press the contact portion against the % road plate. The light source connected to the backplane of the backplane is disposed on one side of the backplane body with respect to the circuit board. In an embodiment of the invention, the clamping structure is formed integrally with the backing plate body. In the embodiment of the present invention, the above-mentioned contact portion is

The contact of the contact is connected to the connection portion, and the other end of the contact portion is in contact with the connection area. In an embodiment of the invention, the connecting portion has a meander shape, and one end of the connecting portion is connected to the back plate body, and the other end of the connecting portion is connected to the contact portion. In an embodiment of the invention, the contact portion has a first positioning structure, and the first positioning structure is in contact with the ground contact. In an embodiment of the invention, the connection area has a second positioning structure, and the first positioning structure and the second positioning structure are mutually engageable to fix 8 1364584 turns 014SMZ1TW 23673twf_d〇c/n fixed circuit board. Block, connect. In the present invention, the first positioning structure is a groove. In the embodiment of the invention, the above-mentioned circuit board is electrically connected to the light source. In one embodiment of the invention, the board is electrically connected. The above circuit board and liquid crystal display surface

The circuit of the present invention (4) is grounded by the recording (4) clamping junction electrically connected with the frame f backplane, thereby grounding the circuit board. Compared to the prior art, the present invention can be grounded without the use of screws and copper tape to reduce noise. The above described features and advantages of the present invention will become more apparent from the following description. [Embodiment] [First Embodiment]

Fig. 1A is a schematic view showing the assembly of a liquid crystal display device according to a first embodiment of the present invention, and Fig. 1B is a perspective view showing the holding member of Fig. 1A. 1A and FIG. 1B, the liquid crystal display 100 includes a front frame 11A, a circuit board 120, a liquid crystal display panel 13A, a plastic frame 14A, and a clamping member 150. The shovel frame 11 is, for example, made of a metal material, and the circuit board has a connection area 122. The liquid crystal display panel 13A is connected to the circuit board 12A, and the circuit board 120 is further electrically connected to the liquid crystal display panel 13A to control the operation of the liquid crystal display panel 13A. The plastic frame 140 and the front frame 110 sandwich the liquid crystal display panel 13A, and the plastic frame 9 1364584 P061014SMZ1TW 23673twf.doc/n has a first surface 142a and a second surface 142b opposite to the first surface H2a. The liquid crystal display panel 13 is disposed between the first surface Mb and the frame U〇, and the circuit board 120 is disposed on the second surface 142b. The holding member 150 is fixed to the plastic frame 14A, and the holding member 15 is made of, for example, a metal material. The holder 150 includes a contact portion 152 and a body 154' as shown in Fig. 1B. The contact portion 152 is disposed above the second surface μ%, and the circuit board 丨2 is disposed between the contact portion 152 and the bezel 14 , wherein the contact portion 152 is in contact with the contact region 122 . The body 154 is coupled to the contact portion 152, and the body 154 is fixed to the frame 14b and is in contact with the front frame 11B. The contact portion 152 has a bent portion X which generates an elastic force to cause the contact portion 152 to press against the circuit board 12A. By the elastic force generated by the bent portion, the contact portion 152 can apply a positive force to press the contact region 122 of the circuit board 12 to ensure the electrical connection of the contact portion 152 with the ground region 122. Thus, the connection region 122 of the circuit board 120 is electrically connected to the front frame 11A via the contact portion 152 and the body 154. Thereby, the circuit board 12 is grounded. In the above, the body 154 further has an assembly hole 154a, and the holder member 150 is fixed to the plastic frame 140 by the assembly hole i54a. For example, an outer side surface 142c of the plastic frame 140 further has an assembly hole 142d, and the assembly hole 154a corresponds to the assembly hole 142d. In the present embodiment, the holder 150 can be locked to the frame 140 by a screw 160 that is assembled through the holes 154a and 142d. However, the method of assembling other clips 150 with the bezel 140 is also known to those of ordinary skill in the art to which the present invention pertains, and thus Fig. 1A is merely illustrative and is not intended to limit the invention. In this embodiment, the body 154 of the clamping member 150c can be a plate-like body 1364584 P061014SMZ1TW 23673twf.doc/n (as shown in FIG. 1B), and the contact portion 152 and the body 154 can be integrally formed to make the clamping member The structure of 150 is relatively strong. Next, the shape of the contact portion 152 may be U-shaped and one end of the contact portion 152 is connected to the body 154, and the other end of the contact portion 152 is in contact with the contact region 122. In addition, the material of the clamping member 150 can be selected from Ming or other suitable metal. In addition, in other embodiments not shown, the contact portion 152 may have a first positioning structure and the connection region 122 may have a second positioning structure. The first positioning structure and the second positioning structure may be engaged with each other. To fix the circuit board 120. In this embodiment, the first positioning structure may be a bump, and the second positioning structure may be a groove. Thus, the contact portion 152 can be more firmly fixed to the joint region 122. In this embodiment, the clamping member 150 is used to hold the frame 140 and the connection region 122 of the circuit board 120 for controlling the liquid crystal display panel 130. Therefore, the noise of the liquid crystal display device 100 is small. Further, the use of screws for pressing the liquid crystal display panel with respect to the prior art and the use of the conductive tape are easily separated from the circuit board, and the holder 150 of the present embodiment has high reliability and convenience in use. [Second Embodiment] Fig. 2A is a perspective view of a liquid crystal display device of a second embodiment of the present invention, and Fig. 2B is a side elevational view of the holding structure and circuit board of Fig. 2A. 2A and 2B, the liquid crystal display 200 of the present embodiment is similar to the foregoing embodiment, like the first embodiment, and the liquid crystal display 200 includes a backlight module and a light source (not shown). The backlight module is assembled with the front frame (not shown in FIG. 2A) to clamp the liquid crystal

II 1364584 P061014SMZ1TW 23673twf.d〇c/n display panel (please refer to FIG. ,), the backlight module includes a back plate 240, which includes a back plate body 242 and a clamping structure 244, and the light source is disposed on the back plate body 242. One side of the board 12 is opposite to the board. In this embodiment, the circuit board 120 can be electrically connected to the liquid crystal display panel, as in the first embodiment, or can be electrically connected to the light source. The difference between this embodiment and the first embodiment is that the holding member of the above embodiment is a separate member, and the holding structure 244 of the present embodiment is a part of the back plate 240. As in the first embodiment, the backing plate 24 of the present embodiment is also disposed on the second surface 142b of the plastic frame 140 (please refer to FIG. 1A). Moreover, in order to simplify the description, FIG. 2A only shows the circuit board 120 of the liquid crystal display 200 and the back board 240. In more detail, the material of the back plate 240 may be metal, and the back plate 240 includes a back plate body 242 and a clamping structure 244, wherein the clamping structure 244 is coupled to the back plate body 242, and the clamping structure 244 and the back The plate body 242 may be integrally formed. The liquid crystal display panel (not shown in FIG. 2A) of the liquid crystal display and the circuit board 12 are disposed on opposite surfaces of the backplane body 242. The clamping structure 244 includes a contact portion 244a and a connecting portion 244b' and the clamping structure 244 can be a metal dome made of aluminum or other suitable metal material. The contact portion 244a includes at least one bent portion γ, and the bent portion γ can generate an elastic force F to press the contact portion 244a against the circuit board 120. In detail, when the contact portion 244a contacts the contact region 122, the bending portion 丫 generates the elastic force F, and the elastic force F is applied to the joint region 122 of the circuit board 120. Therefore, the circuit board 120 is clamped to be fixed between the contact portion 244a 12 1364584 P061014SMZ1TW 23673twf.doc/n and the back plate body 242. Thus, the contact portion 244a is in contact with the contact region 122 of the circuit board 120. The connection portion 244b is connected between the back plate body 242 and the contact portion 244a, wherein the connection region 122 is electrically connected to the back plate 240 via the contact portion 244a to ground the circuit board 120. In the present embodiment, the contact portion 244a of the holding structure 244 may have a U shape as shown in Fig. 2B. One end of the contact portion 244a is connected to the connection portion 244b', and the other end of the contact portion 244a is in contact with the connection region 122. Thus, the circuit board 120 can be disposed between the back plate body 242 and the contact portion 244a. It should be noted that the shape of the contact portion 244a of the present embodiment is not limited to a U shape, and the details thereof are as follows. Fig. 2C is a side elevational view showing another holding structure and circuit board in the second embodiment of the present invention. Referring to Fig. 2C, the clamping structure 244 includes a contact portion 244a and a connecting portion 244b, wherein the connecting portion 24 has a V shape. One end of the connecting portion 244b' is connected to the backing plate body 242, and the other end of the connecting portion 244b' is connected to the contact portion 244a. In this embodiment, the contact portion 244a may have a first positioning structure S and the third clamping structure S is in contact with the grounding region 122 to set the circuit board 12 to the backing plate body 242. For example, the terminating region 122 can have a first positioning structure R, and the first positioning structure § and the second positioning structure can be mutually latched and mounted to secure the circuit board 120. In this embodiment, the first positioning structure S is a bump, and the second positioning structure R is a groove, as shown in Fig. 2C, and vice versa. However, it should be noted that those of ordinary skill in the art to which the present invention pertains can also determine that the first positioning structure s and the second positioning structure & 13 1336448 P061014SM21TW 23673 twf.doc/n ^ other structure related circuit board m. Further, in addition to the contact portion 244 of the contact portion 2B, the contact portion of the structure S may be provided. Therefore, both the diagram 2 = and 244a' are illustrative and not limiting. In summary, the connection area of the circuit board is electrically connected to the frame by the button or the body is tilted by the structure, and the circuit board can be grounded without using the screw-assisted band. In the conventional technology

The effect of the present invention on the image quality of a liquid crystal display is small with screws and conductive tape. In addition, the clamping member and the clamping structure can clamp the circuit board to fix the circuit board. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A is a schematic view showing the assembly of a liquid crystal display according to a first embodiment of the present invention. Fig. 1B is a perspective view of the holder of Fig. 1A. 2A is a perspective view of a liquid crystal display according to a second embodiment of the present invention. FIG. 2B is a side elevational view of the holding structure and the circuit board of FIG. 2A. Fig. 2C is a side elevational view showing another holding structure and circuit board in the second embodiment of the present invention. 14 1364584 P061014SMZ1TW 23673twf.doc/n [Description of main component symbols] 100, 200: Liquid crystal display 110: Front frame 120: Circuit board 122: Connection area 130. Liquid crystal display panel 140: Plastic frame 肇 142a: First surface 142b: Second surface 142c: outer side surface 142d, 154a: assembly hole 150: clamping member 152: contact portion 154: body 160: screw 240: back plate • 242: back plate body 244, 244': clamping structure 244a, 244a' : contact portion 244b, 244b': connection portion F: elastic force S: first positioning structure R: second positioning structure X, Y: bending portion 15

Claims (1)

100-10-20 P month h曰 repair (more) replacement page — p/6 ^ P/f X. Patent application scope: 1_ A liquid crystal display, including: a circuit board 'has a connection area; The display panel is connected to the circuit board; a plastic frame having a first surface and a second surface opposite to the first surface, wherein the liquid crystal display panel is disposed on the first surface, and the circuit board is disposed on the first surface a front surface of the liquid crystal display panel; a clamping member is fixed to the plastic frame, the clamping member comprises: a contact portion comprising two substantially parallel plates And a bent portion of the one of the plurality of flat portions, wherein the circuit board is disposed between the contact portion and the plastic frame, and the contact portion is in contact with the contact region; and a body of the plurality of flat portions The body is connected to the body, and the other of the plate sub-sections is in contact with the contact area, the body is fixed on the plastic frame and is in contact with the front frame, wherein the bent sub-section is adapted to generate an elastic force, so that The flat portion of the tablet that is not connected to the body is pressed against the Board of the touchdown zone. 2. The liquid crystal display according to claim 1, wherein the body has an assembly hole, and the holder is fixed to the frame by the assembly hole. 3. The liquid crystal display of claim 1, wherein the contact portion is integrally formed with the body. 4. The liquid crystal display according to claim 1, wherein the contact portion has a -first positioning structure, the connecting region has a second positioning structure, and the second positioning structure and the second positioning structure are mutually Engage to fix • ν 100-10-20 _ board. 5. The liquid crystal display of claim 4, wherein the first positioning structure is a bump, and the second positioning structure is a groove. 6. A backlight module, comprising: a cooking plate, comprising: a backing plate body and a clamping structure, the clamping structure being coupled to the backing plate body, the clamping structure comprising: a contact portion, comprising substantially a parallel plate portion and a bent portion of the one of the plate sub-sections; a connecting portion connected between the back plate body and the contact portion; a circuit board having a secret area, the circuit board setting And the contact between the back plate body and the contact portion, wherein the bent portion is adapted to generate a 'elastic force' to press the contact portion against the secret plate; and - the light source is disposed on the back plate body On one side of the board. 7. The backlight module of claim 6, wherein the illuminating structure and the backing plate are integrally formed with a beta contact application, and the backlight module of the sixth item, wherein the H gambling, the first-grain structure is in contact with the area. Grounding: There is a backlight module according to item 2, wherein the grounding & has a structure, and the positioning structure can be mutually coupled to each other. I. 疋 10· The backlight module of claim 9, wherein the positioning structure is a bump, and the second positioning structure is a groove. The backlight module of claim 6, wherein the 17 1364584 ^0-10-20 circuit board is electrically connected to the light source. 12. A liquid crystal display comprising: a front frame; a circuit board having a connection area; a liquid crystal display panel; a backlight module assembled with the front frame to clamp the liquid crystal display panel The method includes: a backplane comprising a backplane body and a clamping structure, wherein the liquid crystal display panel and the circuit board are located on opposite surfaces of the backplane body, and the clamping structure is coupled to the backplane body, The clamping mechanism comprises: a contact portion 'contacting the connecting region of the circuit board, the contact portion comprising two flat plate portions substantially parallel to each other to = connect one of the flat plate sub-sections to bend the sub-portion, and the bent portion The portion is adapted to generate an elastic force such that one of the plate sub-portions is pressed against the chopping board; "" one of the connecting portions connected between the back plate body and the contact portion; and the light source 'not placed The backplane body is opposite the side of the circuit board. ▲ 13. The liquid crystal display according to claim 12, wherein the t-side clamping structure is integrally formed with the back plate body. " Please select the liquid crystal display device according to item 12 of the patent scope, the connection of the %, the - _ positioning structure, the first positioning structure and the simple connection 18 1364584 100-10-20. 15. The liquid crystal display of claim 14, wherein the connection region has a second positioning structure, and the first positioning structure and the second positioning structure are mutually engageable to fix the circuit board. 16. The liquid crystal display of claim 15, wherein the first positioning structure is a bump and the second positioning structure is a groove. 17. The liquid crystal display of claim 12, wherein the circuit board is electrically connected to the light source. 18. The liquid crystal display of claim 12, wherein the circuit board is electrically connected to the liquid crystal display panel. 19