TWI303340B - Liquid crystal display and back light module thereof - Google Patents

Description

1303340 V. INSTRUCTIONS (1) — — """ *- [Technical field to which the invention belongs]

The present invention relates to a liquid crystal display and a backlight module thereof, and more particularly to a direct type liquid crystal backlight which can effectively achieve efficiency to achieve higher luminance. Door Government Hot [Prior Art] The liquid crystal display unit in a general liquid crystal display uses a backlight mode to supply a desired light source, and in terms of the type of the backlight module, generally; an edge Ught type and a straight down (direct light, type) two categories. Since the present invention is improved for the direct type backlight module, the following description only describes the configuration of the direct type backlight module, and the description of the edge of the backlight module is omitted. Wan will be as shown in Figure 1 of the Japanese Patent Special Opening 2〇〇1-297 - a kind of backlight device! , including a reflector n, a light diffusing plate 12, = a camping light tube 13, a fluorescent tube support (10), and two light:: the reflector 11 is located at the bottom tube of the backlight module 1' The light reflects off the backlight module 10' and is box-shaped, and:: two 13 and two sides of the board 1 12, side 柘 n 八 wy ^ bottom plate 1 11 bottom plate 112 extends vertically. Light _ ^ ^, 9 The two ends of the bottom plate ln, and the light source from the optical module i, are arranged such that::=the lamp tube 13 has a space between the bottom plate ill and the bottom plate ill has a spacer stop/received '14, and the reflective plate 11 The light sheet 15 is located on the light-emitting surface of the light source 1 to produce an effect of increasing the brightness. The number of brightness required for the backlight module and the confession of the light-reinforcing board 12, such as the number of the fluorescent tubes in the fluorescent tube, and the power supply to the port are also increasing. However, this The temperature of the fifth page of the backlight module, 0632-A50040TWf(Nl) · AU0308012; yuchia.ptd 1303340, invention description (2), will be increased, resulting in an increase in the number and supply of fluorescent tubes. Electricity, but can not increase the brightness of the situation, in detail, because the temperature inside the backlight module is too high, its brightness will decrease with the increase of operating time. In order to improve the above situation, a plurality of openings 23 are formed on the reflecting plate 112 to reduce the ambient temperature of the fluorescent tube 13 by convection on the side perpendicular to the fluorescent tube 13, and the backlight module can be prevented. The temperature inside is too high.

However, since the position of the opening 23 provided on the reflecting plate 11 is on both sides 112 of the reflecting plate 11, the opening 23 is far from the tube 13, and the convection direction generated cannot effectively lower the temperature of the intermediate tube, so the tube is The heat generated cannot be uniformly dissipated, so the heat dissipation problem cannot be solved, and the illumination lamp can not reach the optimum operating temperature, and the backlight A brightness is lowered. ^ ^ , ... ▼ —v 匁 问 问 问 问 问 问 砀 砀 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚 亚In view of the above, it is an object of the present invention to increase the heat dissipation area and to effectively increase the luminance. The october module, another object of the present invention is to provide an optical module which can reduce the leakage current of the lamp and its back. According to the present invention, a luminous efficiency of the backlight module is provided. A plurality of elongated light sources, the bottom plate having a plurality of bottom plates, a bottom plate and a bottom plate and parallel to each other. The plurality of long strips of light "', s hole" political hot slot runs through the original and the heat sink slot parallel, the light source

1303340

V. Description of the Invention (3) The heat generated is dissipated through the heat dissipation slot. In a preferred embodiment, the backlight module further includes a plurality of reflectors disposed between the bottom plate and the elongated light source. In another preferred embodiment, each of the reflectors has a reflective curved surface and a pushing portion that is coupled to the bottom plate via the support portion. In addition, the bottom plate further has at least one perforation, and the support portion is fitted to the perforated moonlight module and further comprises a light diffusing plate, and the elongated light source is disposed between the reflective curved surface and the diffusing plate. There is a first predetermined distance between the light diffusing plate and the elongated light source, and the curvature of the reflecting curved surface is determined by the distance between the elongated light sources and the first predetermined distance. Also, each of the heat dissipation slots is located between adjacent reflectors. • In another preferred embodiment, the base plate and the reflector are integrally formed. The reflector is made of plastic, and the light reflectivity of the plastic is above 95%. In another preferred embodiment, wherein the elongated light source is a fluorescent tube. In the present invention, a liquid crystal display includes a casing, a crystal panel, and a backlight module. The liquid crystal panel is disposed in the casing, and the moonlight module is disposed on the casing with respect to the liquid crystal panel. In the body, the backlight module comprises a bottom plate, a plurality of elongated light sources and a plurality of reflectors, and the bottom portion has a plurality of heat dissipation slots, and the heat dissipation slots penetrate the bottom plate and are parallel to each other. The long strip light source is parallel to the heat sink slot, and the heat generated by the light source is radiated

!303340 V. Description of invention (4) ------ One. And Yizheng. The above-described and other objects, features, and advantages of the present invention will be apparent from the above-described and other objects, features and advantages of the present invention. Show, make ^ (five) as follows. [Embodiment] The panel 4 is shown in the following figure, and the crystal display 1 includes the upper and lower housings 3 and 3, and the liquid crystal panel 4 is disposed in the housing. Among them, the Taiyue obtained the photoreceptor group 3 is arranged on the line of the housing 3 with respect to the liquid crystal panel 4, and the heat dissipation effect and the reflected light of the backlight module 30 are improved. Explain other components in the LCD display. Lu; r f. The figure shows an exploded perspective view of the backlight module 30 of the present invention, and the back includes a light diffusing plate 33, a bottom plate 31, a support table 34, a plurality of elongated strip light sources (lamp tubes) 36, and a plurality of reflectors 37. Next, the structure of the light diffusing plate 33, the bottom plate 31, the support table, the complex light source (lamp) 36, and the complex reflector 37, and the connection relationship therebetween will be described. ,. The light diffusing plate 3 3 is located at the uppermost portion of the bottom plate 31, and the supporting table 34 is used to support the light source 36', and each of the light sources 36 is not in contact with the reflector 37, respectively. The light source of the backlight module 3 can be a fluorescent tube: the complex reflector 37 is disposed between the bottom plate 31 and the light source 36 for reflecting the light of the sauce tube. The backlight module is 3 出. The bottom plate 31 has a plurality of heat dissipation slots 32, and the heat dissipation slots 32 extend through the bottom plate 31, and each slot 32 is flat with each other.

1303340 V. DESCRIPTION OF THE INVENTION (5) Row ' and a plurality of light sources 36 are disposed in parallel with the heat sink slots 3 2 . In the present embodiment, the shape of the heat dissipation slot 32 is elongated, but is not limited thereto, and the heat dissipation slot 32 may be changed in shape as the case may be. Therefore, it is not necessarily the long strip as shown in FIG. The slotted holes may also be a plurality of separate holes arranged in a row along the light source 36. After all of the above elements are combined, as shown in Fig. 4, each of the heat dissipation slots 32 is located between adjacent reflectors 37. The heat generated by the light source 36 can be dissipated through the heat dissipation slot 32, so that an open space can be formed in the entire backlight module 3, whereby a large heat dissipation area can effectively increase the heat convection. The heat of the backlight module is conducted out, so as to achieve high brightness. In addition, on the inner side of the bottom plate 31, a further filter (fi 1 er er) can be added to the heat sink slot 32. It should be noted that in order to highlight the slot 32 of the present invention, The filter is not shown, so as to prevent and filter dust or other foreign matter t from entering the backlight module 3 through the heat dissipation slot 32. The filter settings do not affect the cooling effect. Further, the specifications of the heat dissipation slots 32 may vary depending on the size of the foreign matter. As shown in Fig. 5, the addition of the reflector U of the present invention can surely increase the redundancy of the forward direction based on the fact that the front side brightness of the conventional liquid crystal display is usually =. The reflection benefit 3 7 is disposed directly under each of the elongated light sources 36, and the heat dissipation slots 3 2 are disposed in parallel, and each of the reflectors 37 has a reflective curved surface supporting portion 3 72. As is clear from Fig. 4, the reflective curved surface 37 is a reflection of the Si 3 72. The reflective surface 37 is mainly used to enhance the reflection of the "," line to the light diffusing plate 33, in addition to enhancing the front light of the display.

1303340

In addition, the degree of brightness of the module is reduced on the inner side of the bottom plate 31. In the present invention, in addition to providing the reflector 37, a reflective layer 38 may be additionally added, and the hair is further increased. Further, as shown in the drawing, at least one of the through holes 35 is connected to the bottom plate 31 in each region. Although the figure shows a long strip type, in the example, although the figure is not shown, the formed structure. The hole 35 of the corresponding bottom plate 3 1 of the reflector 3 7 and the support portion 3 72 are fitted to the shape of the present invention which does not define the through hole 35, and may have other shapes. In another variable reflector 37, it can be integrated with the bottom plate 31. As shown in Fig. 5, the distance between the light diffusing plate 33 and the elongated light source is έΛ, and the curvature of the reflective surface is elongated. The distance between the light source and the first predetermined distance is determined. In the simulation of the distance Η and the distance D by the computer, the best curvature of the reflective surface can be obtained. Therefore, the reflective surface of the reflector 37 can increase the forward utilization of the light source, and Brightness to achieve uniform brightness and performance. It should be noted that the material of the reflector 37 of the present invention is different from other reflective layers, and the reflector 37 is made of a special plastic material, and the light reflectance of the plastic is more than 95%, due to the plastic system. The electric insulating material can effectively reduce the leakage current of the lamp tube 36 caused by the moonlight module 3 of the metal member, so that the luminous efficiency of the lamp tube 3 6 is further improved. As described above, the present invention can effectively utilize the formation of the heat dissipation slot 32 to promote thermal convection, allowing the lamp 36 to operate at an optimum operating temperature to optimize the brightness of the backlight module 3 〇. Chemical.

1303340 V. Inventive Description (7) In summary, the heat dissipation slot 32 in the backlight module 30 of the present invention can increase the heat dissipation area and effectively improve the brightness of the liquid crystal display. Another advantage is that the leakage current of the lamp can be reduced by the reflector 37 to increase the luminous efficiency of the lamp. While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

0632-A50040TWf(Nl) ; AU0308012 ; yuchia.ptd Page 11 1303340 Brief Description of the Drawings Fig. 1 is a schematic circle of a backlight module in Japanese Patent Laid-Open No. 2 0 0 1 - 2 9 7 6 2 3; 2 is a schematic view of a liquid crystal display of the present invention; FIG. 3 is an exploded view of the backlight module of the present invention; FIG. 4 is a schematic view of a combination of the backlight module of the present invention; and FIG. 5 is a fourth A cross-sectional view of the backlight module along the AA' section line in the figure. [Description of symbols] I 0 ~ backlight module; 11 ~ reflector; II 1 ~ bottom plate; 11 2 ~ side plate; 1 2 ~ light diffuser; 13 ~ lamp; 1 4 ~ support table; 1 5 ~ collector plate ; 2 3 ~ opening; 1 ~ LCD display, 3 ~ shell; 4 ~ LCD panel, 3 0 ~ backlight module; 3 1 ~ backplane; 32 ~ heat sink slot;

0632-A50040TWf(Nl) ; AU0308012 ; yuchia.ptd Page 12 1303340

0632-A50040TWf(Nl) ; AU0308012 ; vuchia.ptd第13页

Claims (1)

1303340 92137616 _%July ια曰Revised, Muliu, the patented range of backlight modules, including: 汾 a bottom plate, with a plurality of heat sinks 'base, ”—the unequal 仏 孔 贯穿 贯穿 且 且 且 且The bottom and the plurality of elongated light sources are parallel to the heat dissipation slots, and the heat generated by the elongated light sources f is dissipated through the heat dissipation slots; and the plurality of curved reflectors are disposed on the bottom plate and the bottom plate Between equal strip light sources. The backlight module of claim 1, wherein each of the reflectors has a reflective curved surface and a support portion, and the reflective curved surface is coupled to the bottom plate via the branch portion. 3. The backlight module of claim 2, wherein the bottom plate further has at least one perforation, and the support portion is fitted into the through hole. The backlight module of claim 2, further comprising a light diffusing plate disposed between the reflective curved surface and the diffusing plate. The backlight module of claim 4, wherein the light diffusing plate and the elongated light source have a first predetermined distance, and the curvature of the curved surface is equal to the length The distance between the strip light sources and the first 3 predetermined distances are determined. 6. The backlight module of claim 1, wherein each of the heat sink holes is located between adjacent reflectors. The backlight module of claim 1, wherein the bottom plate and the reflectors are integrally formed. 8) The backlight module of claim 1, wherein the backlight module 0632-A50040TWFl(4.5) ; AU0308012 ; Yuchia.ptc Page 14 1303340 Reflection 9: ίίΐ? The light reflectance of the plastic is 95% or more. - Please apply for the backlight module described in item 1 of May, which includes the filter net and is placed above the heat sink slots. The backlight module of claim 1, wherein the elongated source is a fluorescent tube. 〃 1 11. The backlight module of claim 1 , wherein the backlight core is a direct-lit backlight module. 12· A liquid crystal display comprising: a housing; a liquid crystal panel disposed in the housing; and a moonlight panel set disposed in the housing relative to the liquid crystal panel. The backlight module comprises: a bottom panel a plurality of heat dissipation slots, the heat dissipation slots extending through the bottom plate and parallel to each other; and a plurality of elongated light sources parallel to the heat dissipation slots, wherein heat generated by the elongated light sources is dissipated via the heat dissipation a slot that escapes; and/or a plurality of curved reflectors disposed on the base plate and the elongated light sources The liquid crystal display of claim 2, wherein each of the reflectors has a reflective curved surface and a support portion through which the reflective curved surface is The support portion is coupled to the bottom plate. The liquid crystal display of claim 13, wherein the bottom plate further has at least one through hole, and the support portion is fitted in the through hole. 1 5 · The liquid crystal display according to claim 12 of the patent application, 1303340 Case No. 9213761 Fi The patent application scope includes a light diffusing plate, which is disposed between the wave plate and the diffuser plate. According to Item 5, the curvature between the light diffusing plate and the long strip light source is different from the curved surface of the long light source by the first predetermined distance, and the furnace is produced. Mj /7\ 〇1 7 · If the liquid dispersion tank described in item 12 of the patent application is <7丨, the rear a I must crystallize each of the heat dissipation slots in the adjacent reflectors. · The liquid crystal display of the bottom plate and the reflectors integrally formed as described in claim 12 of the patent application, wherein the team/into the long-term state is integrally formed. One call, Lizhong 1 9 · The liquid crystal display as described in item 2 of the patent application scope: These reflectors are made of plastic, and the light reflectance of the plastic is 95/0. The liquid crystal display of claim 2, wherein the elongated light source is a fluorescent tube. 2 1 · The liquid crystal display according to claim 12 of the patent application A filter screen is disposed above the heat dissipation slots. 0632-A50040TWFl(4.5) ; AU0308012 ; Yuchia.ptc Page 16