TWI339295B - Backlight module and a liquid crystal display thereof - Google Patents

Description

TW2515PA IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a backlight module of a back crystal display. , and, in particular, is not confined to a liquid [Prior Art] Since the liquid crystal display has a light point, it is currently used in a large number of personal brain, digital camera, digital camera, video camera Type of equipment, research and development, and the use of large-scale production facilities: the quality of liquid helium display is constantly improving, and the price continues to expand. It is worth mentioning that for non-illuminating display devices, it is necessary to use a backlight mode: the function of the display can be produced after the light source is illuminated. Therefore, the backlight module is one of the important components in the liquid day display. Please refer to FIG. 1 , the main components of the optical module used in the current liquid crystal display, and 10 as an example of the optical module include an optical film 1 2, a light guide plate 104, a reflection sheet 106, and a lamp. The tube group 1〇8, and the first frame body 1〇〇 and the second frame body 11〇 for fixing the above components. Usually, the frame 1〇0 is composed of a metal material, and the second frame 110 is composed of a plastic material. When assembling, the lamp tube group 108 is placed on the side of the first frame 1 , and then the reflection sheet 106 , the light guide plate 104 and the optical film 1 〇 2 ′ are finally placed, and finally the second frame 11 is covered. And fastened to the first frame 1 ,, the assembly of the backlight module 1 〇.

TW2515PA

'Sanda number TW2515PA In the conventional backlight module assembly method, on the outer edge of the side wall 101 of the first frame body, a plurality of hollow openings i〇〇a are made. Further, on the second frame 'body 110 frame 111, a plurality of hooks 111a corresponding to the above-mentioned opening 1A are formed. Thus, when the second frame 11 is mounted above the first frame 1 (10), the outer edge of the frame ill of the second frame 110 will just touch the inner edge of the first frame 101 of the first frame. At the same time, the hook 110a of the frame l of the second frame 110 is just engaged with the opening hole 100a of the side wall 1〇1 of the first frame 1 to complete the assembly between the two frames. As shown in Fig. 2, the liquid crystal panel 12 having the image display function is not required to be placed on the assembled backlight module 1 to receive the light generated by the backlight module. Usually, the four corners of the second frame are provided with L-shaped positioning protrusions, and the block 112 carries the liquid crystal panel. The liquid crystal panel 120 is made of a liquid crystal material filled between two glass substrates, which is a hard and non-deformable material; and the second frame 110 is made of a plastic material, and the thermoplastic plastic material is heated to a high temperature and melted. # Injection molding and cooling, after the completion of the manufacturing, due to internal stress and material shrinkage and other factors, the frame η of the second frame 110 often shrinks toward the center, causing interference when assembling the liquid crystal panel 120. The phenomenon 'severely causes the liquid crystal panel 120 to fail to hit the second frame 110. Therefore, it is possible to effectively improve the assembly inconvenience caused by the molding shrinkage of the second frame 110, and to reduce the difficulty in assembling the liquid crystal panel 120 to improve the efficiency, and to become familiar with the direction of the skilled person. TW2515PA 6 1339295

- Violation number TW2515PA [Invention content] The purpose of the change is to provide a backlight module, and the shrinkage of the liquid crystal panel caused by the shrinkage. According to the purpose of the present invention, it is proposed that: "the back of the seed:: the gentleman: a groove" and the second frame has at least one frame on the frame - the engaging device is attached to the groove and can be straightened On the side wall, the frame and the side wall are formed; after the bonding, the first and second frames receive and fix the light source. The purpose of the invention is further to provide a liquid crystal display, which is not suitable for a liquid crystal panel and a back domain _ to provide the liquid: a 曰 panel light source. The backlight module includes a light source, a first frame body and a second frame body, wherein the first frame body has at least one side wall and a groove on the side wall, and the second frame body has at least one frame and is located on the frame The engaging device of the engaging device is engaged with the groove and can apply a force perpendicular to the side wall (4) on the wall, so that the frame is closely coupled with the side wall, and the first and second frames are combined to receive and fix the light source. The above-mentioned objects, features, and advantages of the present invention will become more apparent and understood. The following detailed description of the preferred embodiments and the accompanying drawings will be described in detail as follows: [Embodiment] Referring to Figure 3 This figure shows the backlight of the first embodiment of the present invention

TW2515PA 7 1339295

. The three-digit number TW25I5PA module 20. As described above, the backlight module 2 includes a first frame 2, an optical film 202, a light guide 204, a reflection sheet 206, a tube group 208, and a second frame 210. The main function of the backlight module 20 is to correct the line light source emitted by the tube group 208 by a reflective sheet 206, a light guide plate 204, an optical film 202, and the like to a uniform surface light source to illuminate the liquid crystal panel; The function of the body 2 and the second frame 210 is to assemble and fix each of the optical elements (the tube group, the reflection sheet, the light guide plate, the optical film, etc.); generally, the first φ frame 200 is made of metal. The material is made, and the second frame 210 is made of a plastic material. After the assembly of the backlight module 20 is completed, the liquid crystal panel 22 is placed above the second frame 21, so that the second frame 21 has a function of positioning the liquid crystal panel 220, as shown in FIG. The L-shaped positioning protrusions 212 are disposed at four corners of the second frame 21〇 to carry the liquid crystal panel 2 2 〇. As shown in FIG. 3, the second frame 21 of the present embodiment has a T-shaped hook 210b on the frame 211 in addition to the hook 21〇a of the prior art; and the first frame The side wall 2〇1 of the body 2 is provided with a groove 2〇〇b which is matched with the above-described τ type hook 210b, in addition to the opening 2〇〇a which is the same as the prior art. When the first frame body 2 and the second busy body 210 are assembled, in addition to the original hook 21 〇a and the opening 2〇〇a being combined with each other, the T-shaped hook 21 〇b is also associated with the groove 2〇〇 b forming an additional fastening structure, the T-shaped hook and the groove can be applied with a force ' perpendicular to the first frame=200 side wall 2〇1 to make the frame 211 and the side wall 2〇1 tightly connected: Therefore, even if the first frame 210 has a tendency to contract the frame 211 inward due to internal stress or material shrinkage, it is limited by the interaction between the T-shaped hook 210b and the groove 2〇〇b. , making the frame Μ 〗

TW25I5PA 1339295

Erda number TW2515PA shrinks inward; therefore, after the backlight module 2〇 is assembled, the liquid crystal panel 22〇 can be smoothly mounted thereon, as shown in Fig. 4, avoiding the prior art, the liquid crystal panel shrinks due to the frame. A situation that causes assembly difficulties. Next, please refer to FIG. 5. FIG. 5 is a schematic diagram of the backlight module 30 according to the second embodiment of the present invention. The difference from the first embodiment is that the τ-type hook on the frame is replaced with two L-shaped hooks 310b, so that the effect of avoiding the contraction deformation of the frame 311 can be achieved. Referring to FIG. 6, FIG. 6 is a view of a third embodiment of the present invention. The backlight pull group 40 is not intended to be different from the first embodiment in that the T-shaped hook on the frame is replaced with a fish hook shape. The protrusion barb 410b can also achieve the effect of avoiding shrinkage deformation of the frame 411. The present invention has been described above by way of a preferred example, and is not intended to limit the spirit of the present invention and the inventive entity, but only to the above embodiments. Familiar with this item

The technician can easily understand and utilize other components or methods to produce the same effect. The improvement of the county IV ^乂' without departing from the spirit and scope of the invention shall be included in the scope of the patent application.

TW2515PA 1339295

Sanda number TW2515PA [Simple description of the illustration] Figure 1 shows an exploded view of a conventional backlight module. FIG. 2 is a view showing the assembly mode of the conventional backlight module and the liquid crystal panel. 3 is an exploded view of a backlight module in accordance with a first embodiment of the present invention. FIG. 4 is a view showing the assembly mode of the backlight module and the liquid crystal panel according to the first embodiment of the present invention. Figure 5 is an exploded view of a backlight module in accordance with a second embodiment of the present invention. Figure 6 is an exploded view of a backlight module in accordance with a third embodiment of the present invention. Reference TW2515PA 10 1339295

Sanda number TW2515PA [Description of main component symbols] 10, 20, 30, 40: backlight module 100, 200: first frame 102, 202: optical film 104, 204, 304, 404: light guide plates 106, 206: Reflecting sheets 108, 208: tube groups 110, 210: second housing 12 0, 2 2 0. liquid crystal panels 101, 201: side walls 111, 211, 311, 411: frame 100a: opening 110a: hook 112: positioning Bump 210b: T-shaped hook 200b: groove 310b: L-shaped hook 410b: raised barb TW2515PA Π

Claims (1)

1^39295 2010/6/28 Amendment 10, the scope of application for patents: 1 · A backlight module comprising: a light source; a first frame having at least one side wall and a groove on the side wall; The two frame body has at least a frame and a card axis on the frame, and the second frame is located after the first frame plate is combined with the groove The second frame body houses and fixes the light source in the first frame, and wherein the engaging device can apply a force substantially perpendicular to the side wall. The side wall of the sea is such that the frame is tightly coupled to the side wall. 2. The backlight module of claim </ RTI> wherein the engaging device is a shackle type hook. ΰ 3. For the backlight module of claim 1, wherein the engaging device is an L-shaped hook. σ 4· The backlight module of claim 1, wherein the engaging device is a raised barb structure. The backlight module of claim 1, wherein the first frame is made of a metal material. 6. The backlight module of claim 1, wherein the second frame is made of a plastic material. The backlight module of claim 3, further comprising a light guide plate disposed adjacent to the light source, the light guide plate being fixed between the first and the first frame. The invention relates to a backlight module according to claim 1, wherein an inner side surface of the side wall abuts an outer side surface of the frame, and an outer side surface of the side wall abuts an inner side surface of the engaging device . A liquid crystal display comprising: a liquid crystal display panel for displaying images; a backlight module comprising: a light source; a first frame having at least one side wall, the side wall having a recess; and first a frame for carrying the liquid crystal display panel, the second frame having at least one frame and one of the engaging devices on the frame, the engaging device and the groove buckle are combined with the first frame, After the bonding, the second frame is located inside the first frame, and the first and the second frame receive and fix the light source, wherein the engaging device can apply a force substantially perpendicular to the sidewall The liquid crystal display of the ninth aspect of the invention is a liquid crystal display of the ninth aspect of the invention, wherein the combination device is a τ type hook. Wherein the engaging device is an L-shaped hook. 12. The liquid crystal display device of the ninth application of the patent scope is a - _ hook structure. The first frame is made of metal </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The liquid crystal display further includes a light panel disposed adjacent to the light source, the light guide plate being fixed between the first and the second frame. 16A liquid crystal display according to claim 9 wherein the sidewall is inside The side surface abuts the outer side surface of the frame, and the outer side surface of the side wall abuts against the inner side surface of the 嗲 engaging device.