TWI333107B - Backlight module - Google Patents

Description

TU- 胂 ..13 3 3107 _ Case No. Π1Π7588__年月日日 ____ V. Description of the Invention (1) Technical Field of the Invention The present invention relates to a backlight module (backlight module), and There is a backlight module that can shorten the light mixing distance and its application. [Prior Art] A Light Emitting Diode (LED) is one of the main light sources of a backlight module applied to a liquid crystal display (LCD), and is a low-power spontaneous light source. The illuminating color of the illuminating diode includes at least red (R), green (G), blue (B), and white light. Among them, because the color saturation of the white light emitting diode is not good, the colors such as red light, green light, and blue light are generally used for color mixing to obtain a white light with better color mixing. In addition, since the light-emitting diode has the advantages of long light-emitting life, small volume, and low power consumption, the light-emitting diode is suitable for being fabricated into an array element, for example, an array of R, G, and B light-emitting diodes. Light source. Referring to Figure 1, a partial perspective view of a conventional liquid crystal display is shown. In the first embodiment, the liquid crystal display device includes at least a backlight module 108 and a liquid crystal display panel 110. The backlight module 108 includes a circuit board 102, a plurality of light emitting diodes 104, and a diffusion sheet 1〇6. The light-emitting diodes 10 04 include a plurality of R, G, and B light-emitting diodes, and an array light source is disposed on the circuit board 102. The diffusion sheet 1〇6 is disposed above the light-emitting diodes 104 and the light sources provided by the light-emitting diodes 4, such as red, green, and blue light, are diffused by the diffusion sheet 106. It will be mixed into white light 'to be directed toward the liquid crystal display panel 110.

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However, this kind of light mixing mechanism requires a large mixing distance, that is, the distance between the light emitting diode 104 and the diffusion sheet 1〇6 is large enough to achieve a uniform light mixing effect. The volume of the backlight module 丨08 is bound to increase as the light mixing distance becomes longer, which is contrary to the basic requirements of today's thin and light liquid crystal displays. [Summary of the Invention]

In view of the above, the object of the present invention is to provide a backlight module for reducing the light mixing distance of the light-emitting diodes therein, which is provided with a light guide plate around the light-emitting diodes, so that the light-emitting diodes are provided. The light can be evenly mixed in a short distance to get rid of the entanglement of the traditional mixed light design, thereby reducing the volume of the backlight module. According to the purpose of the present invention, the rack, a circuit board and a plurality of light-emitting twos form an accommodation. The space, and the circuit board LED is disposed on the circuit board and disposed on the circuit board, and has a light emitting diode for receiving the light emitting diode. According to still another aspect of the present invention, a device includes a circuit board, a plurality of emitters electrically connected to the circuit board, and the circuit board has at least one light emitting light disposed on the circuit board for allowing the present invention The above purpose is to provide a backlight module comprising a frame body and a light guide plate. This frame is set in this accommodating space. These are and are electrically connected to the board. The light guide is at least one through opening, and the through opening is provided with a light mixing device, the light mixing diode and a light guide plate. The light emitting light is convexly disposed on the circuit board. The light guide plate is provided through the opening ‘this through opening is for the body. , features, and advantages can be more obvious, and with the drawings, for details

¥ff· .1333107 - One case number 93107588 _Year. Month day _ Amendment 5, invention description (3) As follows: [Embodiment] For the first embodiment, please refer to Figure 2 and Figure 2, Figure 2 A plan view of the backlight module according to the first embodiment of the present invention is shown in FIG. 2B as a cross-sectional view of the backlight module as viewed along section line 2B-2B of FIG. 2A. The backlight module 200 includes a light mixing device 2〇1 and a frame 212. An accommodating space 2 1 2a is formed in the frame 2 1 2 , and the accommodating space 2 1 2a is surrounded by the frame bottom plate and the frame side frame, and the light mixing device 2 〇 1 is disposed in the accommodating space 212a. . The light mixing device 201 includes at least one circuit board 2 〇 2, a plurality of light emitting diodes 204 and a light guide plate 208. The LEDs 204 are electrically connected to the circuit board 202 and protruded from the circuit board 2〇2. The LEDs 204 are used to provide the light required by the backlight module 200. The light-emitting diodes 204 are, for example, side-emitting type light-emitting diodes, and the light-emitting colors thereof may be red, green, blue, or white. In this embodiment, the LEDs 204 are exemplified by red, green, and blue light-emitting diodes. The light guide plate 208 is disposed on the circuit board 202, and the light guide plate 208 has at least one through opening 210. The through hole 210 is configured to receive the protruding light emitting diode 204. In this embodiment, the light guide plate 2 〇 8 has a plurality of through openings 210 ′ each of the through openings 210 receives a light emitting diode 204 °. The 'light mixing device 201 further includes a reflective material 2 〇 6 , the reflective material 206 Affixed to the circuit board 2〇2 by pasting or coating, and formed to

TO1298(050809)CRF.ptc Page 8 .1333107

Test

A plurality of through openings 206a are provided for the light-emitting surfaces of the light-emitting diodes 2 to 4 to protrude from the through-ports 206a. Further, other reflective materials may be disposed on the inner wall of the frame side panel of the frame 212', and the panel is inclined at a predetermined angle. In such a manner, the light reflected by the reflective material applied or affixed to the side plate of the frame is advanced toward the light guide 208, and the tail light emitting diode is again performed with the light emitted from the light guide plate 2〇8. The red, green or blue light provided by 204 is incident into the light guide plate 208 via the inner wall of the through opening 210, and then, together with the reflection of the reflective material 206, the light guide plate 2〇8 uniformly mixes the light into white light and emits Above the light guide plate 2〇8, as shown in Fig. 2B. Since the light guide plate 208 can mix RGB into white light, that is, a part of the light mixing process has been formed in the light guide plate 208 to greatly reduce the mixing between the light emitting diodes 2〇4 and the optical film (such as the diffusion plate) above it. The distance of the light and the reduction of the volume of the backlight module are quite in line with the trend of the current liquid crystal display to be light and short. However, those skilled in the art can also understand that the technology of the present invention is not limited thereto. For example, the material of the light guide plate 208 can be acrylic (P〇lymethyl Methacrylate 'PMMA) or polycarbonate (p〇iycarb〇nate, PC). ). In addition, the reflective material 206 is also provided in various ways, such as a reflective layer coated on the circuit board 202, a reflective layer coated under the light guide plate 2〇8, or a reflection disposed between the circuit board 202 and the light guide plate 208. board. Furthermore, the reflective material 206 can also be composed of a plurality of reflective plates to achieve the same reflective function. The material of the reflective material 206 may be Polyethylene Terephthalate (PET) °

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SECOND EMBODIMENT Referring to Figure 3, there is shown a side view of an old light module in accordance with a second embodiment of the present invention. The backlight module 3 of the present embodiment is different from the backlight module 200 of the first embodiment in that the backlight module 3 further includes at least one diffusion structure 302 and an optical film 304. The same reference numerals are used for the same components, and will not be described again. The diffusion structure 3 0 2 is disposed on the light guide plate 208 so as to seal the through opening 2 1 , and is located above the light emitting diode 2〇4. The diffusion structure 3〇2 diffuses the light above the light-emitting body 220, and avoids the generation of local bright bands to increase the overall light mixing effect. The optical film 304 is for receiving light from the light guide plate 208 and the reflective material on the side wall of the frame 21 2 and further diffusing and mixing the light. In this way, in the case of reducing the light mixing distance (ie, the distance between the light-emitting diode 2 〇 4 and the optical film 340), multiple mixing is performed, which is better than the conventional mixed light design. The light mixing effect. The material of the diffusion structure 3 〇 2 may be, for example, acryl (PMMA) or polycarbonate (pC), and the optical film 304 is selected from any combination of a diffusion plate, a ruthenium sheet and a brightness enhancement sheet. The reflective material can also be provided in a variety of ways, such as a sputtered metal layer, a coated chemical reflective layer, or a plurality of reflective plates. Furthermore, as shown in FIG. 4, the diffusion structure 3〇2 may have various shapes such as a diffusion plate 3021, a cylindrical diffusion column 3〇22, a convex diffusion column 3023, a concave diffusion column 3024, and a diffusion ball 3〇25. Such a structure that can exert equal diffusion and light mixing effects. Third embodiment

.1333107 --- -MM__93107588___年月日日 Revision 5. Inventive Note (6) ^, please refer to FIG. 5' for a plan view of the body light module according to the third embodiment of the present invention. In FIG. 5, the backlight core group 500 of the present embodiment is different from the backlight module 2 of the first embodiment in the shape of the through opening 504 of the light guide plate 502. The light-emitting diodes 204 form a plurality of rows of light source groups, such as two rows of light source groups 204a. The through openings on the light guide plate 502 are a plurality of through-grooves, such as the two through-grooves 5 shown in FIG. 4. Each of the through grooves 5〇4 accommodates a row of light source groups 204a. In addition, in this embodiment, at least a diffusion structure may be disposed to seal the through trenches 504. The diffusion structures are located above the light source groups 2〇4& and the diffusion structures may be structures of any shape. Fourth Embodiment Referring to Figure 6, there is shown a plan view of a backlight module in accordance with a fourth embodiment of the present invention. In the sixth embodiment, the backlight module 60A of the present embodiment is different from the backlight module 5 of the third embodiment in that there is more than one light guide plate, and the same components are followed by the same reference numerals, and % 3% 0 A plurality of mutually parallel light guide plates, such as light guide plates 6〇2, 6〇4, and are disposed on the reflective material 2〇6 at a predetermined distance from each other, and form a plurality of clamping spaces. The two interposed spaces 6〇8 are shown in Fig. 6, wherein each of the interposed spaces 608 accommodates a row of light source groups 2〇4a. That is, each of the row light source groups 204a is located between two adjacent light guide plates. In this embodiment, at least one diffusion structure may be disposed to seal any one of the through grooves 6 〇 8 , and the diffusion structure is located in the row light source group #± square ac The structure may be a structure of any shape.

TTV1298(050809)CRF.ptc Page 11 •1333107 Field Case No. 93107M8 V 修正 Amendment Description of invention (7) Illumination = =? The backlight module is equipped with a light guide plate in the vehicle. 十 * Ten can make the light of the light-emitting diode very sturdy and evenly mixed light. 'Get rid of the traditional light-mixing design. Nowadays, the liquid crystal display is not: j limit::j: It has been disclosed in the preferred embodiment as above. The spirit of the present invention is familiar to those skilled in the art, and can be used in various ways without departing from the invention. Change and refinement, therefore accurate. Scope* is defined by the scope of the patent application attached

• 1333107 Case No. 93107588 Year of the month Correction Simple description of the drawing [Simple description of the drawing] Figure 1 shows a partial perspective view of a conventional liquid crystal display. Fig. 2A is a plan view showing the backlight module in accordance with the first embodiment of the present invention. Figure 2B is a cross-sectional view of the backlight module as viewed along section line 2B-2B' in Figure 2A. Figure 3 is a side view of the backlight module in accordance with a second embodiment of the present invention. Fig. 4 is a perspective view showing a deformed structure of a diffusion structure in accordance with the present invention. Fig. 5 is a plan view showing a backlight module in accordance with a third embodiment of the present invention. Fig. 6 is a plan view showing the backlight module in accordance with a fourth embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 0 0 : Liquid crystal display 102, 202: Circuit board 104, 204: Light-emitting diode 1 0 6 : Expansion. Dispersion plate 1 0 8 , 2 0 0, 3 0 0, 5 0 0, 6 0 0: backlight module 110. liquid crystal display panel 2 0 1 : light mixing device 2 0 4 a : light source group

TW1298(050809)CRF.ptc Page 13•1333107 霄W't-Λ^: ?ί, Τ.Τ .. * Μ _ Case No. 93107588_ Year of the Moon Correction Diagram Simple Description 206: Reflective Material 206a: Through Ports 208, 502, 602, 604, 606: light guide plate 21 0 : through opening 212 : frame 212 a : housing space 302 : diffusion structure

3021 diffusion plate 3022 cylindrical diffusion column 3023 convex diffusion column 3024 concave diffusion column 3025 diffusion ball 304 : optical film 504 : through groove 608 : clamping space TW1298 (050809) CRF.

Claims (1)

Announcement, this case number 93107588 VI. Shen Yi special IT range 1. A backlight module, including a frame, forming a housing correction Connected through the opening body; its through opening 2. The shot material 3. The shot material The surface glow 4. The side opening is the source group. 5. The light plate is further lighted. 6. A circuit board is disposed on the plurality of side light-emitting types of the frame and is convexly disposed on the circuit board; the reflective material is disposed on the electric light guide plate and is disposed on the opposite The through opening is used for accommodating, and the inner wall of the side illuminating type is incident on the light guide plate. The first item of the patent application scope is attached or coated, and the second item of the patent application scope is at least consistently formed. The light-emitting diode of the through-hole type is protruded from the light-emitting diode system of the first type of the patent application scope, and the plurality of through-grooves, each of the spaces; the housing space of the frame; the diode, The light circuit board on the circuit board; and the light-emitting diode having at least the side-emitting type of the light-emitting diodes will be formed by the backlight module described in the center, wherein the reverse On the board. In the backlight module, the counter is used to supply the reflective material to the sides. In the backlight module, the plurality of rows of light sources are disposed, and the through-grooves are used for accommodating the rows of light. The first embodiment has the through-opening individual body. The backlight module of claim 1, wherein the backlight module, wherein the ground receiving the side light emitting type Page 15 Called 1〇7 Case No. 93107588 Patent application range: a surface-emitting type of light-emitting diode system forms a plurality of rows of light source groups, and the light guide has a plurality of first light guide plates parallel to each other. Each of the rows of light source groups is located adjacent to the two first light guide plates. between. 7. A light mixing device comprising: a circuit board; a plurality of side-emitting light-emitting diodes are electrically connected to the circuit board and protruded from the circuit board; a reflective material, The light guide plate is disposed on the reflective material and has at least a constant opening. The through opening is configured to receive the side light emitting type light emitting diodes. The light of the light-emitting diode of the type will enter the light guide plate from the inner wall of the through opening. 8. The light mixing device of claim 7, wherein the anti-material is disposed on the circuit board in a manner of attaching or coating. 9. The light mixing device of claim 8, wherein the reflective chair material forms at least one through opening, wherein the through opening is used for the side light emitting type LEDs to protrude from the reflection On the material. The light-mixing device of claim 7, wherein the surface-emitting type of light-emitting diode system forms a plurality of rows of light source groups, and the through-opening is a plurality of through-grooves, each of the through-grooves To accommodate each of the rows of light source groups. The light mixing device of claim 7, wherein the light guide plate further has the through openings for individually accommodating the side light emitting type. Page 16 I333J07 Light-emitting diode. The light-mixing device of claim 7, wherein the side-emitting type of light-emitting diode system forms a plurality of rows of light source groups, and the light-guiding plate has a plurality of mutually parallel first-light guide plates, each of which The row light source group is located between the adjacent two first light guide plates. 13. A backlight module, comprising: a frame forming an accommodating space; a circuit board ′ is disposed in the accommodating space of the frame; a plurality of side-emitting type light-emitting diodes electrically connected to the circuit board and protrudingly disposed on the circuit board, the side-emitting type light-emitting diode systems forming a plurality of rows of light source groups; a reflective material, setting On the circuit board; and a light guide plate is disposed on the circuit board, and has a plurality of through grooves, each of the through grooves for accommodating each of the rows of light source groups; wherein each of the rows of light source groups Light will be incident into the light guide plate through the inner wall of the through groove. 14. The backlight module of claim 13, wherein the reflective material is attached to the circuit board in a manner of attaching or coating. The backlight module of claim 14, wherein the reflective material is formed by at least one through opening, wherein the through opening is used for the side light emitting type LED to protrude from the reflection On the material. 16. A backlight module, comprising: a receiving space formed in a frame; a circuit board disposed in the receiving space of the frame; Page 17 1333107 ._Case No. 93107588_年月日日__ ':: VI. Patent Application Scope' A plurality of side-emitting type LEDs are electrically connected to the circuit board and are protruded from the circuit. The light-emitting diode system of the side-emitting type forms a plurality of light source groups; a reflective material is disposed on the circuit board; and a plurality of light guide plates are disposed on the reflective material in parallel with each other, The row light source group is located between the adjacent two light guide plates; wherein the light of each of the row light source groups is incident into the two light guide plates by the side faces of the adjacent two light guide plates. 17. The backlight module of claim 16, wherein the material is disposed on the circuit board in a manner of attaching or coating. 18. The backlight module of claim 17, wherein the reflective material is formed by at least one through opening, wherein the through opening is used for the side light emitting type LED to protrude from the reflection On the material. Page 18