TWI247179B - Edge-light unit - Google Patents

Abstract

An edge-light unit at least includes a first light, a second light and a light guide. The first light and the second light are disposed at two opposite sides of the light guide, respectively. A block region is disposed between the opposite sides of the light guide and divides the light guide into two regions, including a first light-guiding region and a second light-guiding region.

Description

1247179

V. DESCRIPTION OF THE INVENTION (1) (I) Technical Field of the Invention The present invention relates to a backlight module, and more particularly to an edge-lit backlight module of a light guiding area.先前Multiple [Prior Art] The moonlight module is widely used in planar mixers', especially in liquid crystal displays. With the liquid crystal display, the display function is required. The backlight module for the liquid crystal display is mainly a sub-divided backlight module and a side-lit backlight module. Knife For the conventional side-lit backlight module, if it is used on a small-sized display panel, a single light source can be generally used. However, when it is used for a larger size, a plurality of light sources are generally used. As shown in FIG. 1 , the conventional sidelight type north light module 1 mainly comprises a diffusion film n, a light guide plate 12 (1^ buckle July and February Guide), a plurality of light sources 13, a plurality of reflection members 14, and a reflection. Slice 15. The scattering film 11 is disposed on the light emitting surface 121 of the light guide plate 12. The light sources 13 are disposed on both sides of the light guide plate 12, respectively. The reflection members 14 are respectively coupled to both sides of the light guide plate 12, and the light sources 13 are covered therein. In the case of the above-described edge-lit backlight module, a plurality of light sources 13 have been required to have uniform and continuous illumination in the display area of the flat panel display. However, with the development of backlight module driving technology, complex light sources are no longer only required to emit light uniformly and continuously, and are further required to drive illumination in turn, thereby achieving the effect of pulse-type display (impulse-type display. In other words, when the light source drives the illuminating day, the plane & the display area is preferably divided into at least two different times.

1247179

The light-emitting region, in other words for the light guide, preferably has two light-guiding regions. However, the light guide plate of the edge-lit backlight module is provided and provides two or more light guiding regions. In other words, when a certain light source is illuminated, the light of the light source still enters the entire light guide plate, so that the type is The effect of the display is reduced. According to the above description, it is an important subject to provide an edge-lit backlight module with a pulse-type display effect in which a suitable light source is used to drive light. [3], [Summary of the Invention] In view of the above problems, an object of the present invention is to provide a backlight module that can be applied to a light source to drive illumination in turn to achieve a pulse-type display effect. In order to achieve the above object, the edge-lighting back according to the present invention comprises at least a first light source, a second light source, and a light guide plate; the light source and the second light source are respectively disposed on the light guide plate. The opposite side, the phase, and the side have a light blocking region (bl〇ck regi〇n), and the light blocking region divides the light guide plate into a first light guiding region and a second light guiding region. As described above, since the edge-lit backlight module of the present invention changes the structure of the light guide plate, even if there is a light-blocking region between the two sides of the light guide plate, the light guide plate has two light guides. Area. Therefore, when the t-light source drives the light in turn, the light in each light-guiding area will not affect each other. In other words, the edge-lit backlight module of the present invention can have a display panel of a flat display having two light-emitting regions, so that when the light source drives the light to rotate, the flat-panel display has two light-emitting regions that emit light at different times. achieve

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With pulse type display effect. (4) [Embodiment] The side of the preferred embodiment according to the present invention will be described below with reference to the related mode optical backlight module. [Embodiment 1] As shown in FIG. 2, the edge-lit backlighting group 2 of the first preferred embodiment of the present invention includes at least a first light source 21, a first _^, an emirate, a yi' Original, 2 2, and a light board 23. In this embodiment, the first light source 21 and the second light source can be a cold cathode light tube, or a diode light body, or an external electrode fluorescent lamp: the two if two light source 21 and the second light source 22 are respectively disposed on the guide The light plate 23 is opposite to the sides 2 31, 2 3 2 . Further, as shown in Fig. 2 and Fig. 3, in the present embodiment, the light guide plate 23 has a flat plate shape, and has a light blocking region 233 between the opposite sides 231 and 232. The light blocking region 2 33 divides the light guide plate 23 into a first light guiding region 234 and a second light guiding region 2 35. At this time, the light guide plate 23 has a light emitting surface 236 and two reflecting surfaces 237 and 237. In the present embodiment, the light blocking region 2 3 3 of the light guide plate has a groove 238 parallel to the opposite sides 231, 232, that is, the light guide plate 23 is divided by the groove 238. Two light guiding regions 234, 235. In addition, as shown in FIG. 4, in order to concentrate the light in the respective light guiding regions, the concave groove 23 8 may be filled with a reflective material 239, such as a metal material, etc., to form a parallel side of the opposite sides. a reflective layer in the direction of the sides. Of course, the formation of the reflective layer can also be formed in other ways. In addition, there may be one in the light blocking region 2 3 3 of the light guide plate.

1247179 V. DESCRIPTION OF THE INVENTION (4) A scattering layer in the direction parallel to the sides of the opposite sides, for example, heat-dissolving one of the light-blocking regions 233 to change its material to form a scattering layer (please refer to Figure 8). Further, the light-blocking region 2 3 3 of the light guide plate may have a light absorbing layer in a direction parallel to the opposite side faces, for example, the groove 238 is filled with the light absorbing material. Of course, the light absorbing layer can also be formed in other ways. According to the above, when a light source is 21 points free, most of the light will be reflected from the reflecting surface 237, and then emitted from the light emitting surface 236 corresponding to the reflecting surface 237. In other words, the light blocking region 2 3 3 partially blocks the light of the first light guiding region 234 from entering the second light guiding region 235. In the present embodiment, the amount of light from the first light guiding region 234 in the second light guiding region 235 is preferably 80% to 〇% of the amount of light in the first light guiding region 234. On the other hand, when the second light source 22 is illuminated, most of the light will be reflected from the reflecting surface 2 3 7 ', and then emitted from the light emitting surface 2 36 corresponding to the reflecting surface 2 3 7 . In other words, the light blocking region 2 3 3 partially blocks the light of the second light guiding region 235 from entering the first light guiding region 234. In the present embodiment, the amount of light from the second light guiding region 235 in the first light guiding region 234 is 80 of the amount of light in the second light guiding region 235. /◦~0% is better. At this time, when the first light source 2 1 and the first light source 2 2 are turned off in turn, the light guide plate 23 will be formed into a dark band alternately with the brake wheel J spring. In this case, when the edge-lit backlight module of the present invention is the same as the m-plane display, the flat-panel display will have two disadvantages. The light-emitting area of the aa light is further improved by the pulse type display. Further, as shown in the backlight module 2 of FIG. 2, the side light of the first preferred embodiment of the present invention may include a first reflecting member 24 ( Refiector) and one

Page 9 1247179 V. Inventive Description (5) One " Second Reflecting Member 25' The first reflecting member 24 and the second reflecting member 25 respectively cover the first light source 21 and the second light source 22, and the first reflecting member 24 and the second reflecting member 25 are respectively joined to opposite sides of the light guide plate 23. Further, as shown in FIG. 2, the edge-lit backlight module 2 of the first preferred embodiment of the present invention further includes a diffusion film 26 and a reflective film 27. The diffusion film 26 is disposed on the light-emitting surface 23 of the light guide plate 23, and the reflective film is placed on the reflective surfaces 237 and 237 of the light guide plate 23. [Embodiment 2] The following will be shown in FIG. 5 to FIG. The second preferred embodiment of the present invention is specifically described as an edge-lit backlight module 3. Specifically, in the second preferred example, the configuration of the light guide plate is different from that of the first embodiment. In addition, the other components are substantially the same as those of the first embodiment, and are omitted because they are omitted. ^OFF i Λ As shown in FIG. 5, the edge-lit backlight of the second preferred embodiment of the present invention=3 The system includes at least a first light source 31, a second light source, and a first light source, and the first light source 31 and the second light source 32 are cold cathode lamps or diode illuminants, or For the external electrode, the light guide plate 23 is in the form of a flat plate, and the opposite sides are connected to each other and the right one/two/two light-blocking regions 333. The light guides are in the light blocking region 333. The through holes 338 in the direction of the sides 331 and 332 are further divided into two parts - a first light guiding area 334 and a second light guiding area 335. The through hole 3 is shown as ' Line more focused on the respective light guide region to form 339 ', for example, a metal material with a reflective material facing parallel Ά the like, into the opposite sides of the reflective layer Μ D direction side of the course, trans

1247179 V. INSTRUCTIONS (6) The formation of the shot layer can also be formed by other means. In addition, the light blocking region 3 3 3 of the light guide plate may have a scattering layer in a direction parallel to the opposite side surfaces, for example, one of the light blocking regions 33 3 may be thermally dissolved, so that The material changes to form a scattering layer (please refer to Figure 8). Further, the light-blocking region 333 of the light guide plate may have a light absorbing layer in a direction parallel to the opposite side faces, for example, the light absorbing material is filled in the through hole 338. Of course, the light absorbing layer can also be formed in other ways. In addition, as shown in FIG. 5, the edge-lit backlight module 3 of the second preferred embodiment of the present invention further includes a first reflector 34 and a second reflector 35. The first light source 31 and the second light source 32 are respectively coated on the opposite sides of the light guide plate 33. Further, as shown in FIG. 5 and FIG. 6, the edge-lit backlight module 3 of the second preferred embodiment of the present invention further includes a diffusion film 36 and a reflective film 37. The diffusion film 36 is disposed on the light-emitting surface 336 of the light guide plate 33, and the reflection film 37 is disposed on the reflection surfaces 337 and 337 of the light guide plate 33. As described above, when the first light source 3 is lit, most of the light is reflected from the reflecting surface 337, and is emitted from the light emitting surface 336 corresponding to the reflecting surface 337. In other words, the light blocking region 3 3 3 partially blocks the light from the first light guiding region 334 from entering the second light guiding region 335. In the present embodiment, the amount of light from the first light guiding region 234 in the second light guiding region 335 is preferably 80% to 〇% of the amount of light in the first light guiding region 334. On the other hand, when the second light source 32 is turned on, most of the light will be reflected from the reflecting surface 33, and then emitted from the light emitting surface 3 36 corresponding to the reflecting surface 3 3 7 '. In other words, the light blocking zone 3 3 3

1247179 i, invention description (7) partially blocking the light of the second light guiding region 335 into the first, "in the embodiment, the first light guiding region 334 is from the second light guiding region 334. The second light guiding device 8〇%~〇% of the amount of light in the area 335: ^ The light quantity of the light area 235 - when the light source 31 and the second light source 32 are turned off, it is better, / at this time, when the first one alternates the dark band. Therefore, when the surface of the light plate 33 is to be used in a flat display day temple, the light-emitting area of the flat side light-emitting backlight module can be simultaneously illuminated, and the right side does not have two The effect of the pulse type display [Embodiment 3] The edge light type backlight module 4 of the present embodiment will be specifically described with reference to FIG. 9 to FIG. The second light source 41 and the second light source are included in the present embodiment. The first light source 41 and the second light source are included in the present embodiment. 42 series can be a cold cathode lamp, or a diode illuminator, or an external electrode luminescent lamp =. Further, as shown in FIG. 9 and FIG. 1 , the light guide plate 43 has a light output. The first light source 41 and the second light source 42 are respectively disposed on the opposite sides 431 and 432 of the light guide plate 43. In the embodiment, the light board 43 is double wedge-shaped. The light blocking plate 43 is divided into a first light guiding area 434 and a second light guiding area 435. In this embodiment, the light blocking area 433 is included in Vertically, the sides 431, 432 are oriented such that the thickness of the section 433 between the two sides of the light guide plate 43 is smaller than the area of the side profile thickness. More specifically, in the present embodiment, the light blocking area 4 3 3 is the connection area of the two wedge-shaped light guide plates. Page 12 1247179 V. Description of the Invention (8) As described above, when the first light source 41 is lit, most of the light will be reflected from the reflective surface 437. Further, the light exiting surface 436 corresponding to the reflecting surface 437 is emitted. In other words, the light blocking region 433 partially blocks the light of the first light guiding region 434 from entering the second light guiding region 435. In this embodiment The amount of light from the first light guiding region 434 in the second light guiding region 335 is 80% to 〇% of the amount of light in the first light guiding region 434. Conversely, when the second light source 42 is turned on, most of the light will be reflected from the reflecting surface 4 3 7 ', and then emitted from the light emitting surface 4 3 6 corresponding to the reflecting surface 4 3 7 '. In other words. The light blocking region 4 3 3 partially blocks the light of the first light guiding region 435 from entering the first light guiding region 434. In the embodiment, the amount of light from the second light guiding region 435 in the first light guiding region 434 Preferably, it is 80%~〇% of the amount of light in the second light guiding area 435. At this time, when the first light source 4 1 and the first light source 4 2 are turned off, the light guide plate 43 will be formed. A dark band alternating with one turn. Accordingly, when the edge-lit backlight module 4 of the present invention is used in a flat panel display, the flat panel display can have two light-emitting regions that emit light at different times, thereby achieving the effect of having a pulse type display. In addition, as shown in FIG. 9 , the edge-lit backlight module 4 of the third preferred embodiment of the present invention further includes a first reflective member 44 and a second reflective member 45. The reflector 44 and the second reflector 45 respectively cover the first light source 41 and the second light source 42 , and the first reflector 44 and the second reflector 45 are respectively joined to opposite sides of the light guide plate 43 . Further, as shown in Fig. 9, the side light type of the optical pickup group 4 of the third preferred embodiment of the present invention may further include a diffusion film 46 and a reflection film 47. The diffusion film 46 is disposed on the light-emitting surface 436 of the light guide plate 43, and the reflective film 47 is adjacent to

1247179 V. Description of the Invention (9) The reflecting surfaces 437 and 437' provided on the light guide plate 43 are provided. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims.

Page 14 1247179 Brief Description of the Drawings (5), [Simple Description of the Drawings] FIG. 1 is a schematic view showing the construction of a conventional edge-lit backlight module; FIG. 2 is a schematic view showing the first preferred embodiment of the present invention. FIG. 3 is a cross-sectional view showing a cross section of the light guide plate in the AA direction shown in FIG. 2; and FIG. 4 is a cross-sectional view showing the AA direction shown in FIG. FIG. 5 is a schematic view showing the structure of the edge-lit backlight module of the second preferred embodiment of the present invention; FIG. 6 is a schematic view showing the light guide plate shown in FIG. 5; FIG. 1 is a schematic view showing a light guide plate section shown in FIG. 5; FIG. 8 is a schematic view showing a light-blocking region of the first and second preferred embodiments of the present invention having a heat-dissipating scattering layer; FIG. 9 is a schematic view showing the construction of the edge-lit backlight module of the third preferred embodiment of the present invention; FIG. 10 is a cross-sectional view of the light guide plate not shown in FIG. Component symbol description: 2, 3, 4 edge-lit backlight module 2 1 , 3 1 , 4 1 first light source 22, 32, 42 second light source 23, 33, 43 light guide plate 231, 232 opposite sides of the light guide plate

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Figure 16 is a brief description of the pattern 233 light blocking area 234 first light guiding area 235 second light guiding area 236 light emitting surface 237, 237, reflecting surface 238 groove 239 reflective material 331 ^ 332 light guide plate opposite sides 333 light Resisting area 334 first light guiding area 335 second light guiding area 336 light emitting surface 337 , 337, reflecting surface 338 through hole 339 reflective material 431 ^ 432 opposite sides of the light guide plate 433 light blocking area 434 first light guiding area 435 second light guiding area 436 light emitting surface 437 > 437' reflecting surface 24 H 44 first reflecting member 25 ' 35 ' 45 second reflecting member 26, 36, 46 diffusion film 1247179 simple illustration 27, 37, 47 reflection Membrane imi第17页

Claims (1)

1247179 6. Patent application scope 1. An edge-lit backlight module, comprising: a first light source; a second light source; and a light guide plate, wherein the first light source and the second side are respectively disposed on opposite sides thereof The light source has a light blocking region between the opposite sides, and the light blocking region divides the light guide plate into a first light guiding region and a second light guiding region. 2. The edge-lit backlight module of claim 1, wherein the light-blocking portion partially blocks light from the first light-guiding region from entering the second light-guiding region, so that the first The amount of light from the first light guiding region in the two light guiding regions is 80% to 0% of the amount of light in the first light guiding region. 3. The edge-lit backlight module of claim 1, wherein the light-blocking portion partially blocks light of the second light-guiding region from entering the first light-guiding region, so that the first The amount of light from the second light guiding region in a light guiding region is 80% to 0% of the amount of light in the second light guiding region. 4. The edge-lit backlight module of claim 1, wherein the light guide plate has a flat shape. 5. The edge-lit backlight module of claim 1, wherein the light-blocking region of the light guide plate has a groove parallel to the opposite sides. Page 18 1 As described in the scope of patent application, the side-light type of the north side of the light-shielding zone of the light-guide plate has a flat-two-optical die, a through-hole. Ding the opposite sides; The side light type north of the patent scope of the invention is filled with a reflective material in the through hole of the light guide plate. The month "pull group, wherein the light backlight module, wherein the opposite side sides are parallel 9. The light-blocking region of the light guide plate has a reflective layer in the _ direction as described in the first aspect of the patent application. 10. The edge-lit backlight module of claim 1, wherein the light-blocking region of the light guide plate has a scattering layer parallel to the sides of the opposite sides. 11. The edge-lit backlight module of claim 1, wherein the light-blocking region of the light guide plate has a light absorbing layer parallel to the sides of the opposite sides. The edge-lit backlight module of claim 1, wherein the light guide plate is in the direction of the opposite sides of the light guide plate, and the light-shielding area of the patent application area is applied. The thickness of the section is less than the thickness of the section of one of the opposite sides of the light guide plate. 1 . The edge-lit backlight module of claim 2, wherein the light guide plate has a double wedge shape. The side-lit backlight module of claim 1, wherein the first light source and the second light source are cold cathode fluorescent tubes, or diode illuminants, or external electrode fluorescent tubes. . The sidelight type backlight module of claim 1, wherein the side light type backlight module further comprises a first reflection member and a second reflection member, the first reflection member and The second reflecting member respectively covers the first light source and the second light source, and the first reflecting member and the second reflecting member are respectively coupled to the opposite rain sides of the light guiding plate. The edge-lit backlight module of claim 1, wherein the light guide plate has a light-emitting surface and at least one reflective surface opposite to the light-emitting surface. The edge-lit backlight module of claim 6, wherein the edge-lit backlight module further comprises a diffusion film disposed on a light-emitting surface of the light guide plate. </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; It is disposed on the reflective surface of the light guide plate. ΙΙϋϋ第21页