TWI235271B - Plane light source device and image display device - Google Patents

Abstract

The present invention provides a plane light source device and an image display device wherein the frame 2 of plane light source device is provided therein with a reflecting sheet 3, a light guiding plate 4, light controlling plates 5-8 and a light source unit 11. Said light source unit 11 has a rod light source 12, a reflector 13 containing rod light source 12 and a reflector retainer 14 for supporting reflector 13. Said reflector 13 has a first plate 37 contacting the end of emitting plane 36 and a second plate 38 contacting the lower side of reflecting sheet and being supported by reflector retainer 14. The projection 41 formed on second plate 38 engages with the aperture 42 formed on the plate base 43 of reflector retainer 14 so as to prevent the deformation of reflector 13 and to position reflector 13 with respect to reflector retainer 14. Thus the interval between incident plane 10 and rod light source 12 is maintained in order. The same function is also available by mounting a plurality of ring member or cylindrical member on rod light source 12.

Description

1235271 A7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs ^ ~ ------ V. Description of the Invention (i) '[Background of the Invention] 1 · TECHNICAL FIELD The present invention relates to a type of notebook computer, navigation, etc. Devices, portable information and communication terminals, electronic dictionaries, and other flat screen light source devices with liquid crystal display panel dedicated image display sections on the screen, and image display devices provided with the flat light source devices. 2 · Related technology For example, liquid crystal display devices used as video display devices are used in notebook computers. In most cases, the liquid crystal display device is equipped with a flat light source device. The planar illumination light emitted from the flat light source device irradiates the liquid crystal display panel (image display portion), so that the image is displayed on the display screen of the liquid crystal display panel. 16 and 18 show a planar light source device 101 used in a liquid crystal display device 100 of this type. As shown in the two figures, the planar light source device 101 is provided with a resin frame 2 including various components. Within the frame 2, the reflection plate 3, the light guide plate 4, and a plurality of light control plates 5 to 8 are sequentially housed. A light source unit 11 is arranged on the incident end surface 1 (side end surface) side of the light guide plate 4. The light source unit 11 It includes: a fluorescent lamp 12 as a rod-shaped light source arranged opposite to the incident end face; a reflector 13 that reflects the light of the fluorescent lamp 12 and guides it to the incident end face 10 of the light guide plate 4; and a mirror support 14. The mirror support 14 is made of metal, and is fixed to the frame 2 in a state where the fluorescent lamp 12 is housed in the mirror 13. The flat light source device 101 is to use the light from the fluorescent lamp 12 to apply the Chinese National Standard (cnS) A4 specification (210 X 297 mm) from the light guide plate to the paper size. 1 313119 (Please read the precautions on the back before filling this page ) J · Order --------- Line · 1235271

V. Description of the invention (2 (Please read the precautions on the back before filling in this page) The exit surface 36 of the 4 emits in a plane shape, and the exit light from the light guide plate 4 passes through a plurality of light control plates 5 to 8 The light emitting surface from the light guide plate 4 is directed toward the liquid crystal display panel 16. Thereby, uniform and bright planar illumination light is formed. The planar illumination light is used to illuminate the liquid crystal display panel 16. In recent years, especially on notebook computers The liquid crystal display used is 100. In order to make it easier to carry and view the screen, more performance is required. Therefore, while achieving thinner and lighter weight, it also hopes to achieve an effective display field. (Actually, the area X where the screen can be displayed is enlarged. As a result, the ineffective portion (peripheral portion) of the liquid crystal display panel on the liquid crystal display device 100 becomes smaller. The peripheral portion that is not used for the image display is like a frame added to a picture It can also be referred to as "outer frame portion". Accordingly, "narrow frame (narrowing the outer frame)" has prevailed in recent years. In response to this narrow frame, 'the thickness of the frame 2 made of resin can be reduced. Thin design. As a result, the rigidity of the frame 2 will be reduced, especially the rigidity of the part that houses the fluorescent lamp (first side 21) will be reduced. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs: This is to eliminate Frame 2 The support of the various members is unstable, and the countermeasures have been taken. That is, the plate-shaped base 43 of the mirror support 14 is fixed to an opposite side perpendicular to the first side 21 of the frame 2 with screws (not shown) ( The second side 30 and the third side 31), and the side walls 44 to 46 erected by the plate-like base 43 of the mirror support η are fastened to the first to third sides 21, 30, 31 This can be used to roughly use the mirror support 14 to reinforce the frame 2. However, if this method is used, the wall thickness of the first side 21 of the frame 2 is compared with the wall thickness of the other sides. It will become very thin. Therefore, the paper size of the receipt paper after injection molding is applicable to TWA standard (CNS) A4 ^ 721Gx 297 male ^ ----- 2 313119 Ϊ235271

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper size is in accordance with Chinese National Standard (CNS) A4 (210 x 297 public love) 3 The shrinkage will be smaller on the first side 21 and larger on the other side. If such a difference is obvious, as shown in the two-dot chain line in FIG. 16 or in FIG. 19, the first side 21 may be slightly deformed inward. In addition, in Fig. 16, in order to emphasize the deformation of the frame 2, it is displayed with an exaggerated amount of deformation. Again I, in this case, if the Mth of the frame 2. The amount of bending deformation is larger than the gap between the frame 2 and the light control plates 5 to 8, and the light control plates 5 to 8 are compressed by the frame 2. For this reason, wrinkles are generated on the light control plates 5 to 8 and uneven brightness of the emitted light is generated. In addition, the manufacture of the reflecting mirror 13 is generally formed by processing a thin metal sheet into a sheet metal, and has a long plate member having a U-shaped cross section as shown in FIGS. 17 and 17 and 18. Therefore, the rigidity of the reflector 13 is smaller than that of the reflector support 14 having the function of the reinforcing member of the frame 2. However, such a reflector 13 usually has rubber lamp holders 22 and 23 fitted to the fluorescent lamp 12 at both ends thereof. The two ends are held on the frame 2 at the same time as the lamp holders 22 and 23. This means that the middle portion between the two ends is not fastened to the frame 2 or the mirror support 14. Therefore, as shown by the two-dot chain line on FIG. 17, when sheet metal processing is applied to the mirror 13 to cause bending, as shown in FIGS. 20 to 21, the middle portion of the mirror 13 will be larger than normal. Further sink into the light guide plate 4 side. Therefore, the interval between the fluorescent lamp 12 and the incident end surface 10 of the light guide plate 4 becomes narrow, and the light L of the fluorescent lamp 12 is incident from the incident surface 36 side of the light guide plate 4 into the inside of the light guide plate 4. From this phenomenon, it can be seen that only the portion where the amount of incident light from the emission surface 36 side 'has a haze portion. In addition, the light control boards 5 to 8 are 313119 i—ΜΊ -------- 4 ^^ -------- order --------- line (please read the note on the back first) Please fill in this page again) A7 1235271 V. Description of the invention (4) The mirror 13 is compressed and produced on it ^ ^, and the wrinkles are easy to become the cause of the scattered light distribution and uneven brightness. . [Summary of the purpose of the invention] Therefore, 'The purpose of the present invention is to solve the problems of the conventional techniques as described above. The present invention aims at improving the original source of the ten-sided device of Voorum, which can effectively prevent the unevenness of the emitted light caused by the deformation of the frame or the mirror, and obtain a uniform and bright lighting output. In addition, the present invention seeks to provide a display device which can obtain a high-quality display by using such an improved flat-light Mae Ding Tian You Yuan device. The present invention is applicable to a flat umbrella but a curved source device, which emits light from a light source unit installed in a frame by a light guide plate and a light control plate which are confined in the frame. According to the present invention, the light source unit of the planar light source device includes: a rod-shaped light source disposed opposite to an incident end surface of the light guide plate; and a light source that accommodates the rod-shaped light source and guides the light of the rod-shaped light source to the light guide plate A sheet metal processed reflector at the entrance end face; and a mirror support body mounted on the aforementioned frame while supporting the aforementioned mirror. According to an improved form of the present invention, the reflecting mirror has an i-th plate-shaped portion that is in close contact with an end surface of the exit surface on the incident end surface side of the light guide plate; and a second plate-shaped portion supported by the mirror support. unit. Here, the second plate-like portion and the above-mentioned mirror support are unevenly engaged with each other and positioned. With this improvement, 'even if the mirror is deformed due to bending, since the mirror and the mirror support are concavely and convexly connected, the positioning of the mirror on the mirror support' can suppress and correct the bending and deformation of the mirror. As a result, the paper size applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 313119 (Please read the precautions on the back before filling this page) --------- Order-- ------- Line-Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 1235271 V. Description of the invention (5) Keep the incident end of the rod-shaped light source and the light guide plate and μ at a distance between & size. It is also possible to prevent the light control panel from being deformed due to the shrinkage of the mirror (another improvement according to the present invention, which is sensitive to the aforementioned rod-shaped light source, is fitted to a pair of ring-shaped members, and in addition, the aforementioned paired The ring members are adjacent to each other in a manner close to each other, so that the plurality of ring members are supported by the ring members' in the reflector. Here, the% -shaped member can be used as a type 0. The ring-shaped or roughly c-shaped ring. The shape of the cloth-like member is formed in a shape that closely contacts the inner surface of the reflector and the incident end surface of the light guide f, and the inner surface can also form a shape that opposes the ring light source. That is, the ring The components are arranged so as to surround the outer periphery of the rod-shaped light source, and can also support the rod-shaped light source in the reflector. This improves the deformation of the mirror caused by bending, so that the rod-shaped light source is connected to the light board. The force of the bending deformation incident on the end surface can also be pushed back by the elastic force of a plurality of ring members arranged between a pair of ring members. Therefore, the bending deformation of the rod-shaped light source can be suppressed to a small amount. Degree 'may Hold the space between the rod-shaped light source and the light guide plate. Furthermore, at the same time, it can also prevent the light control plate from being wrinkled by the compression of the reflector. According to another improved form of the present invention, the rod-shaped light source is embedded with At least a pair of ring-shaped members are combined, and a substantially cylindrical elastic member is fitted between the ring-shaped members. The rod-shaped light source is supported by the ring-shaped member and the cylindrical elastic member. In the mirror. »__ ^ With this improvement, the approximately cylindrical elastic member exerts the same number as the aforementioned national standard (cns) A4 -5 of the paper 313119 A7 1235271 V. Description of the invention (6) The ring-shaped member has the same function and suppresses the bending of the mirror. As a result, it is possible to prevent the light control board from being wrinkled due to the compression of the mirror. Then, according to another aspect of the present invention, the aforementioned frame is for One side of the light source unit is concavely engaged with a hook formed on the mirror support. According to the improvement of the present invention, even if one side of the frame is deformed by expansion of the rod-shaped light source due to heat, etc., There is no problem. That is, since the hook of the mirror support is fastened to one side of the frame, the frame can be prevented from being deformed by the hook of the mirror support. As a result, the rod-shaped light source can be appropriately maintained. The distance from the incident end surface of the light guide plate prevents wrinkles on the light control board due to the deformation of the frame. This can achieve a bright surface without uneven brightness. By improving the planes of the above types The light source device is combined with an image display panel, and the image display panel is illuminated with planar light emitted from the planar light source device, which can constitute an image display device according to the present invention. Of course, such an image display device reflects various improvements according to the foregoing improvements. Advantages. That is, the image display panel is illuminated by using non-uniform and bright planar light to improve the quality of the displayed image. [Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Moreover, for easy understanding, a part of the illustration is enlarged as necessary. (1) First embodiment mode First, referring to Figs. 1 to 3, a planar light source device 1 according to a first embodiment of the present invention is shown. Figure 1 is a plan view showing the plane light source installed. The paper size is applicable to the Chinese National Standard (CNS) A4 specification mo X 297 mm. 313119 (Please read the note on the back? Matters before filling out this page} J- ----- --- Order -------- Line · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 6 A7 1235271 __B7___ V. Description of Invention (7) (Please read the precautions on the back before filling this page) Set 1 Fig. 2 is a plan view showing the flat light source device 1 that is exploded. In addition, Fig. 3 is an enlarged cross-section taken along line A_A in Fig. 1. (Schematic configuration of the flat light source device) As shown in these drawings' The planar light source device 1 includes a frame 2 accommodating components, a reflection plate 3, a light guide plate 4, a plurality of light control plates 5 to 8, and a light source unit 1 i sequentially housed in the frame 2. The light source unit element ii The light guide plate 4 is mounted on the frame 2 so as to face the incident end surface (one side end surface) ig of the light guide plate 4. The light source unit 11 includes a rod-shaped light source 12, a reflecting mirror 13 accommodating the rod-shaped light source 12, and a housing for supporting and accommodating the light source unit 11. Mirror support 14 for mirror 13 of rod-shaped light source 12 Moreover, in this embodiment, a fluorescent lamp is used as the rod-shaped light source 12. In addition, a rod-shaped light source other than a fluorescent lamp may also be used. As is well known, the reflector 13 has a function of reflecting the light of the fluorescent lamp 12 and The function of guiding to the incident end surface 10 of the light guide plate 4. (Frame) The frame 2 printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is shown in Figs. 1 to 8 and consists of pc (polycarbonate), PMMA ( A substantially rectangular member made of a white synthetic resin such as acrylic resin) is manufactured by injection molding. A light guide plate receiving portion 15 is formed on the frame 2 to receive and support the reflection plate 3 and the light guide plate. 4 and light control boards 5 to 8; the image display panel receiving section 丨 7, which accommodates and supports the image display panel 16 such as a liquid crystal display panel with a small gap with respect to the surface of the uppermost light control board 8; and the light source receiving section 18, It is used to accommodate the fluorescent lamp 12 and reflector 13 of the light source sheet 70 11. _In order to achieve the miniaturization and light weight of the plane light source device 1, the frame 2 This paper size applies the Chinese national standard (cns) a standard X297 public meal ) 7 313119 12352 71

The wall thickness of each part should be as thin as possible. In addition, "thinning" is applied to the 15th surface 20 of the light guide plate receiving portion. In addition, the "bottom oblique broadcasting Λ ▲ M thinning" button is one of the means for reducing weight by removing a part of the constituent materials and making it into a shape such as opening π. The bottom surface 20 of the light guide plate accommodating portion 15 can support the reflection plate 3 and the light guide.

There are 4 panels, and it has a shape that can be installed on the control panel (circuit, wiring, etc .; not shown), etc. In addition, as shown in FIG. 4 to FIG. 7 in detail, the frame 2 is formed on both end portions of the lower side of the -side (first side) 21 of the incident end surface 10 side of the light guide plate 4, respectively. The holders 22 and 23 engaged with the lamp holders 22 and 23 at both ends of the lamp 12 hold the recesses μ and 25. Furthermore, on the lower side of the first side 21 of the frame 2, the reflecting mirror is accommodated. Therefore, the m-th wall thickness of the frame 2 is thinner than the other side, and the rigidity is also less than the other side *. Therefore, the first side 21 is reinforced with a mirror support. That is, as shown in detail in FIGS. 3 and 8, a substantially rectangular hook trough recess 27 is formed on the first side 21 to be engaged with the plurality of hooks 26 of the mirror supporting skeleton 14, and The plurality of hook% -embedded projections 28 of the mirror support 14. The hook accommodating recess 27 of the first side 21 accommodates the hook 26 of the mirror support 14, and the hook 26 of the mirror support 14 is fastened to the protrusion 28 of the first side 21. Thereby, the first side 21 of the frame 2 and the mirror support 14 can be integrally fastened and detached. Furthermore, it is possible to prevent the first side 21 of the frame 2 from being bent inward. (Refer to the two-point chain line in Figure 16). Here, in order to prevent the upper surface of the hook 26 from projecting upward from the upper surface of the first side 21, it is preferable to determine the shape of the hook 26 and the concave amount of the hook receiving recess 27. If this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 313119 (Please read the precautions on the back before filling this page)

--------- Order --------- Line I Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economy 8 1235271 B7

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (9) At this time, it is difficult for other parts, etc. to catch the hook 26, and the hook 26 is not easy to detach from the projection 28. Furthermore, on the frame 2, positioning protrusions 34 are formed on the inner sides of the second side 30 and the third side 31 which are substantially perpendicular to the first side 21, respectively. The positioning protrusions 34 are connected to the two formed on the light guide plate 4 and the reflection plate 3. The substantially rectangular notches at the ends are fastened adjacent to 32 and 33. Thereby, even if external force such as vibration or impact is applied to the planar light source device 1, the light guide plate 4 can be restricted from being deviated from the fixed position in the frame 2, and the conflict between the light guide plate 4 and the fluorescent lamp 12 can be avoided. As a result, breakage of the fluorescent lamp 12 can be prevented. (Light source unit) As shown in FIGS. 1 to 3 and FIGS. 9 to 12, the light source unit 11 includes a fluorescent lamp 12 and a reflector 13 (refer to FIG. 9) that houses the fluorescent lamp 12. And a mirror support body ι4 that supports the mirror 13 (see FIG. 10). To the both ends of the fluorescent lamp 12, rubber lamp supports 22 and 23 are fastened. In addition, a pair of rubber O-rings (an example of an annular member) 35 are fitted to each other at a substantially symmetrical position with respect to the center. The mirror support 14 is fastened to the end of the mirror 13 and is also fastened to the lamp support receiving recesses 24 and 25 formed on the first side 21 of the frame 2 (see Figs. 5 and 6). The O-rings 35 and 35 prevent the fluorescent lamp from directly contacting the inner surface of the reflector 13 and protect the fluorescent lamp from impact. Therefore, the O-rings 35 and 35 elastically support the fluorescent lamp 3 in the reflector 13. The cable 39 on the ground (gland) side is contained in the space between the first side 21 and the reflector 13 (refer to this paper standard, applicable to China National Standard (CNS) A4 specification (210 X 297 meals) 9 313M9 (Please read the precautions on the back before filling this page), install ---- order --------- line > · 1235271

5. Description of the invention (10, figure 3). Reflector 13 is made of thin metal plates such as liver stainless steel plates & sheet metal processing < Please read the precautions on the back before filling out this page). The eyepiece gauge 13 of the reflecting mirror 13 has: a first plate-like portion 37 in close contact with the end of the light-exiting surface 36 of the light guide plate 4; in close contact with the lower side of the reflecting plate 3, and inversely: a second plate supported by the mirror support Plate-shaped part%; connect the first! The upright wall portion 40 of the plate-like portion 37 and the second plate-like portion 38. If the mirror 13 is viewed as a whole, it can be said that it has a toilet. Also, the first side 21 of Zhu 2 has a long ruler (band-shaped member) of approximately the same length. The first plate member 37 can prevent light from entering the inside of the light guide plate 4 from the end portion on the incident end surface 10 side of the light exit plate 36 of the light guide plate 4. A projection 41 protruding toward the lower surface side is formed on a substantially central portion in the longitudinal direction (direction along the axis of the fluorescent lamp 12) of the front end of the second plate-like portion 38. Then, a hole 42 fastened to the projection 41 of the mirror 13 is formed in the plate-like base 43 of the mirror support 14. As shown in FIG. The leftover clothing of the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs can fix the protrusions 41 of the mirror 13 to the holes 42 of the mirror support 14 if the mirror 13 is bent due to sheet metal processing (see The two-point chain line in Figure 17) can also correct this bending. In addition, even if the mirror 13 is deformed, the mirror 13 is not deformed, and the mirror 13 can be positioned on the mirror support 14. The mirror support 14 has a plate-like base 43 fixed to the lower side of the second side 30 and the third side 31 of the frame 2 with screws (not shown), and supports the outer surface of the first side 21 and the first side 21 of the frame 2 respectively. The side wall portions 44 to 46 which stand up from the plate-like base portion 43 on the outside of the second side 30 and the outside of the third side 31. The mirror support 14 is the same as the above-mentioned mirror 13 and applies the Chinese National Standard (CNS) A4 specification (21 × 297 mm) to the non-recording steel paper size. 10 313119

V. Description of the invention (11) 1235271 Sheet metal and other metal plates are formed by sheet metal processing and processed, but the wall thickness is greater than the aforementioned reflector 13 and the rigidity is also greater. Therefore, Frame 2 can be reinforced. At the upper end of the side wall portion 44 located on the outer side of the first side 21 of the frame 2, the mirror support 14 is folded to form a pair of hooks 26, which are connected to the protrusions formed on the first side 21. 28 buckles. By making the hook 26 snap into the projection 28 of the frame 2, the frame 2 can be prevented from bending and deforming toward the inside of the first side 21. Furthermore, the 'hook 26 is provided with a cave dove which is engaged with the protrusion 28 of the first side 21 “inside the substantially rectangular frame portion 2”. Further, it is “on the front end side of the plate-like base 43 of the mirror support 14 and is located A portion of the lower side of the reflection plate 3 is formed with ribs extending substantially along the axial direction of the fluorescent lamp 12, thereby enhancing the rigidity of the mirror support 14. The assembly of the light source unit 11 is performed as follows. First, as As shown in Figs. 3 and 9, the fluorescent lamp 12 is housed in the reflector 13. Then, as shown in Fig. 10, the reflector 13 is combined with the reflector support 14. At this time, as described above The projection 41 of the mirror 13 is fastened to the hole 42 of the mirror support 14. That is, the second plate-shaped portion 38 of the mirror 13 and the plate-shaped base 43 of the mirror support 14 are unevenly fastened. This allows the mirror 13 and the mirror support 14 to be positioned, and at the same time, the wall mirror 13 can be deformed. As shown in FIG. 11, the hook 26 of the mirror support 14 is fastened to the frame 2. The projection 28 of the first side 21 pushes a screw (not shown) and penetrates the second plate-like portion 3 of the mirror 13 8 and the screw holes 47, 48 of the plate-like base 43 of the mirror support 14, and the screws are used to make the mirror 13 and the mirror support the paper size of the Chinese National Standard (CNS) A4 (210 313119 -7 ---- ----- ^ --------- line-0 ^ (Please read the notes on the back before filling out this page) 297 mm printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 11

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1235271 5. Description of the Invention (u) The holder 14 is fixed to the lower side of the second side 3 () and the third side 31 of the frame 2 so that the frame 2 and the light source unit u Integration. Afterwards, the remaining 3, the light guide plate 4, and the light control plates 5 to 8 are housed in the light guide plate accommodating part 15 of the planting frame 2 to be assembled into a planar light source device i (see FIG. 1 to FIG. 2). Next, the liquid crystal display panel 16 is housed in the video display panel storage portion 17 of the frame 2 to be assembled (see Fig. 3) into an image display device 50 (here, a liquid crystal display device) (see Fig. 3). (Light guide plate) The light guide plate 4 is formed of a material having good light transmittance, such as PC, PMMA, and a cycloolefin resin. The vertical cross-sectional shape of the fluorescent lamp 12 has a wedge shape that gradually becomes thinner as it moves away from the fluorescent lamp 12. The exit surface (upper surface) 36 has a substantially rectangular shape. Rectangular notches 32 are formed on both ends of the incident end surface 10 of the light guide plate 4. The notch portion 32 is engaged with the positioning protrusion 32 formed on the inner side of the second side 30 and the third side 31 of the frame 2. Furthermore, the external dimensions of the light guide plate 4 are based on the temperature expansion characteristics of the light guide plate 4 and the frame 2. Or manufacturing errors such as differences in hygroscopic expansion characteristics. Therefore, under the condition that the flat light source device 1 or the image display device (liquid display device) 50 is used, between the side end face other than the incident end face 10 and the side wall of the light guide plate accommodating portion 15 are separated. Create tiny gaps. In addition, the light guide plate 4 is different from the soft plate-like members such as the reflection plate 3 and the light control plates 5 to 8 described later. It has a sufficient rigid I paper size that does not easily deform. The Chinese national standard (CNS) A4 specification ⑵G χ 297 public meals) '12 313119: — ^ ----------------- Order --------- line (Please read the precautions on the back before filling this page ) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1235271

Sex. As is well known, when the fluorescent lamp 12 is turned on, light is introduced into the light guide plate 4 from the incident end surface 10. Light is transmitted inside the light guide plate 4, and is slowly emitted from the emission surface 36 during the transmission. Further, the means for emitting light from the exit surface 36 can be appropriately applied to various means such as a conventional one. (Reflection plate) The reflection plate 3 is a plate-shaped member made of a resin material having excellent light reflectivity, for example, white ρΕτ (polyethylene reflection plate). This size and shape correspond to the exit surface 36 of the light guide plate 4 and the rectangular surface (back surface) 51 on the opposite side. It is well known that the reflection plate 3 can reflect the light leaked from the back surface 51 and return it to the inside of the light guide plate 4 to prevent light loss. The reflecting plate 3 has cutout portions 33 corresponding to the cutout portions 32 of the light guide plate 4 at both ends of the front end portion on the fluorescent lamp side. The notch portion 33 is engaged with a positioning protrusion 34 formed on the inner side of the second side 30 and the third side 31 of the frame 2. (Light Control Board) The light control board disposed in this embodiment mode includes a diffusion plate (opposite to the light control plate, which is arranged on the outer side of the light guide plate 4) and is disposed opposite to the exit surface 36 of the light guide plate 4. Lens (2nd and 3rd light control sheet) 6, 7; Protective plate (4th light control board) arranged on the outside 8. The function of each light control board is as well known. That is, the diffuser plate has ears. The light emitted from the exit surface 36 diffuses and achieves a uniform brightness distribution function. Next, the cymbals 6 and 7 correct the light transmission direction to the front direction, which can be effectively used in lighting The ratio of light is increased. The protective plate (4th light control plate) 8 has a function of preventing damage to the cymbal 7 disposed on the inner side thereof. In addition, it imparts weak light diffusivity. The U-scale is applicable to Chinese national standards (cns) a4 size (210 x 297 meals) 313119

--------- ^ --------- Line 1 (Please read the notes on the back before filling this page) 13 1235271

V. Description of the invention (14) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 14 These light control plates 5 to 8 are formed of a highly transparent resin material such as PET (polyethylene reflective plate), and have an exit surface " Corresponding to a roughly rectangular shape. These light control plates 5 to 8 are sequentially housed in the light guide plate accommodating portion 15 above the light guide plate 4, and are fastened to the frame 2 with fixing devices such as tapes and clamps (not shown). . This can prevent the light control plates 5 to 8 from shifting in the frame 2. (Functions and Effects of the First Embodiment Mode) The planar light source device 1 of this embodiment mode configured as described above has the following effects. a) The protrusion 28 formed on the second side of the frame 2 is fastened to the hook 26 'of the mirror support 14 and can correct the bending deformation of the i-side 21 inward. Therefore,' the light control plate 5 to 8 will not be wrinkled by the i-side 21. In addition, unevenness in the brightness of the outgoing light caused by the wrinkles of the light control plates 5 to 8 can be prevented. (B) The first 2 Between the protrusion 41 of the plate-like portion 38 and the plate-like base portion 43 formed on the mirror support 14 42-phase fastening, and the mirror 13 can be positioned on the mirror support 14. Therefore, even if the mirror 13 is bent inward as shown in Fig. 17 (bending caused by sheet metal processing), This distortion can also be corrected. As a result, the distance between the fluorescent lamp 12 and the incident end surface 1 () of the light guide plate 4 can be maintained in an appropriate state. Furthermore, the first plate-like portion of the mirror 13 can be used. 37. The end portion on the side of the incident end surface 10 of the light exit plate 36 of the light guide plate 4 is reliably shielded. Therefore, it is possible to prevent the light of the fluorescent lamp 12 from entering the light guide plate 4 into the inner surface of the light guide plate 4. (CNS) A4 specification (210 X 297 male f) — 313119 * * * 『Ί ---------- ^ --------- line (please read the precautions on the back before filling (This page) 1235271 A7 B7 V. Description of the invention (15) (Please read the precautions on the back before filling in this page). And as mentioned above, the deformation of the reflector 13 can correct the fluorescent lamp 12 and the guide. The interval between the incident end faces 10 of the light plate 4 is maintained in an appropriate state, so that the light control plates 5 to 8 are not pressed by the mirror 13 and wrinkled. Therefore, it is possible to prevent uneven brightness of the emitted light caused by the light incident from the emitting surface 36 into the light guide plate 4. (c) The projection 41 and the projection 41 of the mirror 13 can be covered with the reflection plate 3 The holes 42 of the mirror support body 14 that are engaged with each other. Therefore, the protrusions 41 of the mirror 13 or the holes 42 of the mirror support body 14 cannot be seen from above the exit surface 36. In addition, defects such as light leakage will not occur. (D) The liquid crystal display panel 16 is illuminated by the planar uniform illumination light of the planar light source device 1 as described above, so that a brighter and easier-to-see image display can be produced. (e) On the front end side of the plate-like base portion 43 of the mirror support 14 and on the lower surface side of the reflection plate 3, ribs 52 and 53 extending substantially along the axial direction of the fluorescent lamp 12 are formed, whereby The rigidity of the mirror support 14 is improved. In addition, this embodiment can tolerate various modifications as follows. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs That is, in this embodiment, the protrusion 41 forming a mirror 13 and the hole 42 of the mirror support 14 are taken as examples. However, the present invention is not limited to this. For example, the protrusions 4 j of the plurality of mirrors 13 and the holes 42 of the mirror support 14 may be formed separately. Furthermore, in this embodiment, the protrusion 41 is formed at the front end of the second plate-like portion 38 of the mirror 13. However, the present invention is not limited to this. For example: It can also be formed on the lower side of the reflective plate 3 (the second plate-like portion 38. The paper size applies the Chinese National Standard (CNS) A4 specification (210 x 297 mm) 15 313119

5. Description of the invention (part of I6 1235271). In addition, in this embodiment, the protrusion 41 is formed by projecting the front end of the second plate-like portion 38 of the mirror 13 toward the lower jaw (side of the plate-like base portion 43 of the mirror support 14). However, the present invention is not limited to this. For example, the second plate-shaped portion 38 may partially protrude to the lower side. At this time, the plate-shaped base portion 43 of the mirror support 14 is formed with a concave portion or a hole which is unevenly engaged with the protruding protrusion. Further, 'a protrusion may be formed in the plate-like base portion 43 of the mirror support 14', and a hole or a recessed portion engaged with the protrusion may be formed in the second plate-like portion 38 of the mirror 13. At this time, it is preferable that the protrusions do not protrude from the upper surface side of the second plate-like portion 38. A projection is formed on the lower side of the hook 16 of the mirror support 14, and a recessed portion engaged with the projection is formed on the first side 21 of the frame 2, and the projection of the fishing 26 ′ is unevenly engaged with the recessed portion on the first side. With this, the bending deformation of the first side 21 of the frame 2 can also be corrected. In the present embodiment, the example in which two hooks 26 are formed on the mirror support 14 has been described as an example. However, the present invention is not limited to this. For example: As long as the bending deformation of the first side 21 of the frame 2 can be corrected, the hook 26 and the protrusions 28 fastened to the hook 26 may be only 丨, and the hook 26 and the protrusions 28 fastened to the hook may also form 3 More than. (2) Second embodiment In this embodiment, as a device for correcting the bending of the reflecting mirror 13, a device different from that used in the first embodiment described above may be used. That is, on the fluorescent lamp 12 of the flat light source device 1 in this embodiment, ^ -------------------- Order ------- --Line (Please read the notes on the back before filling this page) Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economy The paper size applies to the Chinese National Standard (CNS) A4 (210 x 297 mm) 16 313119 1235271

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, as shown in Figure 13, except for a pair of o-rings (ring members) 35 and 35, the general plan is to form a pair of O-rings 35 and 35. μ Shi Shang Ding is Shao Shang, and a plurality of 0-rings (ring members) 54 are fitted and arranged in a state of being close to each other and being in close contact with each other. With such a configuration, if the mirror 13 is bent inwardly and deformed (refer to FIG. 17), a defective state can be avoided. 7 That is, generally speaking, the bending of the reflector 13 inward will cause the bending deformation of the labor lamp 12. Here, of course, the amount of deformation of the fluorescent lamp 12 is the largest at the substantially central portion. If the fluorescent lamp 12 is placed there, there is a possibility that the largest deformed portion contacts the incident end surface of the light guide plate 4. Here, in order to avoid such a situation, in the present embodiment, a plurality of o-rings 54 are closely arranged on a substantially central portion of the lamp 12 (i.e., the largest deformed portion). Moreover, these plural O-rings 54 may be suppressed by a considerable force on the incident end face 10. However, in this embodiment, a plurality of O-rings 54 can be used to disperse the pressing force received from the incident end surface 10, so this doubt can be resolved. That is, compared with the case where only one O-ring 35, which is the same as a pair of O-rings 35, 35, is arranged at the center of the fluorescent lamp 12, the amount of elastic deformation of each O-ring 54 is reduced, and the guide can be ensured. There is sufficient space between the light plate 4 and the fluorescent lamp 12. In other words, the bending of the reflecting mirror 13 can be bridged by a plurality of O-rings 54 arranged at the substantially central portion of the fluorescent lamp 12 to ensure that there is sufficient space between the fluorescent lamp 12 and the light guide plate 4. Here, the width dimension W of the plurality of O-rings arranged at the roughly central portion of the light lamp 12 is set when the wire diameter of a pair of O-rings 35 and 35 is d: ------- ------------- Order --------- Line (Please read the precautions on the back before filling this page) This paper size applies to China National Standard (CNS) A4 specifications ( 210 x 297 mm) 17 3I3II9 1235271 A7 ^ B7 V. Description of the invention () w 2d to 4d as 隹. At W < 2d, the effect of correcting the mirror 13 may not be sufficiently obtained. At W > 4d, there are too many light-shielding portions, and this light-shielding portion is likely to be regarded as uneven brightness of the emitted light. In this way, since the deformation of the reflecting mirror 13 can also be corrected in this embodiment, a sufficient space can be ensured between the incident end surface 12 and the fluorescent lamp 12. In addition, the first plate-like portion 37 of the reflecting mirror 13 can reliably shield the end portion on the incident end surface 10 side of the emission surface 36, and can prevent the light of the fluorescent lamp 12 from entering the light guide plate 4 from the emission surface 36 of the light guide plate 4. Phenomenon inside the light plate 4. Moreover, as described above, the space between the fluorescent lamp 12 and the incident end surface 10 can be sufficiently protected due to the deformation of the bridge regular reflection mirror 13, so that the control boards 5 to 8 can be prevented from being suppressed by the reflection mirror 13. Wrinkles are produced. Therefore, according to this embodiment, it is the same as the first embodiment described above, and it is possible to prevent the uneven brightness of the emitted light due to the incident light from the exit surface 36 of the light guide plate 4. The above-mentioned second embodiment is an example in which a plurality of O-rings are arranged in a substantially central portion of the fluorescent lamp 12 in a state in which a plurality of o-rings are in close contact. However, the present invention is not limited to this. For example, as shown in Fig. 14 and Fig. 15 (a), a substantially cylindrical rubber ring (elastic member) 55 may be fitted to the substantially intermediate portions of the pair of O-rings 35 and 35. Here, as shown in Fig. 15 (1)), the ring 55 can form a slit 56 that spans the entire length in the width direction, making it easier to fit the fluorescent lamp 12. Even with this structure, the same effects as those of the second embodiment can be obtained. When adopting this deformation mode, the width dimension of ^^ 55 is the same as the previous paper size. The Chinese National Standard (CNS) A4 specification (210 X 297 -------- 313119) (Please read the precautions on the back first) (Fill in this page again) Order --------- Line j Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 18 1235271 A7 ------- B7 V. Description of Invention (w) The second implementation type The state is the same, if the diameter of the O-ring 35 is set to d, w is preferably 2d to 4d. (Please read the precautions on the back before filling out this page) In addition, in the aforementioned second embodiment, it is an example A state in which a plurality of Q-shaped rings are arranged in close contact with each other in the approximate center of the fluorescent lamp 12. However, deformation is also allowed. For example, adjacent O-rings 54 may be separated by a small distance (Other implementations) The present invention also allows various modifications. The following are examples: (A) The configuration of the plurality of light control boards 5 to 8 in each of the foregoing implementations is merely an example, for example, it can be configured Other light control boards. Also, the number of light control boards can be changed as needed. For example, one side of the cymbals 6 and 7 may be omitted. (B) Each of the foregoing embodiments uses a light guide plate 4 having a wedge-shaped longitudinal cross-sectional shape. However, the present invention is not limited to this. For example, it may be A light guide plate having a substantially uniform thickness as a whole can also be used. Light guide plates with other cross-sectional shapes can also be used. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs (C) In the foregoing embodiment, the light source unit 11 is only disposed on the light guide plate 4 The incident end surface 10 side. However, the present invention is not limited to this. For example, a plurality of incident end surfaces may be provided on the light guide plate, and a plurality of light source units may be provided correspondingly. As described in the detailed description of the month, according to the present invention The flat light source device can prevent the light control board from being wrinkled by the frame or the mirror by correcting the bending deformation of the frame or the bending of the reflector, and can prevent the light of the glare lamp from exiting from the light guide plate. As a result, it is possible to suppress the application of the Chinese National Standard (CNS) A4 specification (210 X 297 mm) from the paper size of the light guide plate. 313119 19 1235271 A7 B7 Ministry of Economic Affairs Printed by the Production Bureau's Consumer Cooperatives. 20 V. Description of the Invention (Fando is not false when the surface light emitted is 20), and uniform and bright surface illumination is obtained. In addition, the 'image display device of the present invention' is issued from the aforementioned plane. The uniform and bright planar illumination light of the light source device illuminates the image display panel. Therefore, 'the image display quality of the image display panel can be improved. [Simplified description of the drawing] Fig. 1 shows a first embodiment of the present invention. A plan view of the state + surface light source device. Fig. 2 is a plan view showing the plane light source device in an i-th embodiment. Fig. 3 is an enlarged cross-sectional view of the plane light source device along line A_A in Fig. I. Fig. 4 is a plan view showing a frame. Fig. 5 is a view viewed from the direction b in Fig. 4 (the incident end view). Fig. 6 is a view viewed from the direction C in Fig. 5 (a diagram showing the lower side of the first side of the frame). Fig. 7 is an enlarged cross-sectional view taken along line D_D in Fig. 5. Fig. 8 is a view showing a state in which a hook of a mirror support body is engaged with a frame protrusion. Fig. 9 is a plan view showing a reflector for accommodating a fluorescent lamp. Fig. 10 is a plan view showing a light source unit. Fig. 11 is a plan view showing a frame in which the light source unit is mounted. Fig. 12 is a perspective view showing a part of a reflector and a reflector support. ) A4 size (210 X 297 meals) 313119 -------------------- Order --------- line (Please read the precautions on the back first (Fill in this page again)

Fig. 13 is a diagram showing a glare lamp according to a second embodiment of the present invention. V. Description of the invention (21 1235271 Figure 14 shows a glory lamp showing a modification of the second embodiment ^ Figure 15 is a perspective view showing an example of two rings, ⑷ is a first example showing a ring, (b ) Is a second example of a ring. FIG. 16 is a plan view showing a conventional planar light source device. FIG. 17 is a plan view showing a conventional fluorescent lamp and a reflector. FIG. 18 is a line along the line in FIG. An enlarged sectional view of EE. Fig. 19 is a sectional view of a planar light source device showing a bent state of a frame. Fig. 20 is a sectional view of a defective state of a conventional flat light source device caused by bending of a reflector. Fig. 21 is a view showing An enlarged cross-sectional view of a part in Figure 20. [Explanation of component symbols] (Please read the precautions on the back before filling out this page) Printed by the Intellectual Property Bureau Staff Consumer Cooperatives of the Ministry of Economic Affairs 16 LCD Display Panel (Image Display Panel ) 17 Image display panel storage section 18 Light source storage section 20 Bottom surface 2 Frame 4 Light guide plate 10 Incident end face (side end face) 12 Fluorescent lamp (rod-shaped light source) 14 Mirror support 1, 101 flat light source device 3 Reflector 5 to 8 Light control board 11 Light source unit 13 Reflector 22, 23 Lamp holder 26 Fishing 30 Second side 21 First side 24, 25 Retaining body receiving recess 28 Protrusion 31 Third side This paper size applies Chinese national standards (CNS) A4 specifications (210 x 297 mm) 21 313119 A7 1235271 B7 V. Description of invention (22) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 32, 33 Notch 35, 54 0-ring 36 Ejection surface 37 No. 1 plate-like portion 38 second plate-like portion 41 protrusion 42 hole 43 plate-like base portion 44-45, 46 side wall portion 47 ^ 48 screw hole 50, 100 liquid crystal display device (video display device) 51 back 55 ring 56 slit ^- ------------------- Order --------- Line (Please read the precautions on the back before filling this page) This paper size applies to Chinese national standards (CNS) A4 size (210 x 297 mm) 22 313119

Claims (1)

1235271 m * Congratulations α No. 90126234 patent application, the scope of the patent application is amended! Yisi ,, (September 13, 1993): The surface light source clothing is a light guide unit from a light source unit installed in a frame, which is housed in the light guide plate and The light-controlling plate-shaped emission is characterized in that: the aforementioned light source unit on the front surface has: a rod-shaped source arranged opposite to the incident end face of the light guide plate; and the first light source of the rod-shaped light source guides the light of the rod-shaped light source A sheet metal processed reflector to the incident end face of the aforementioned V-front plate; and a mirror support body 'mounted on the aforementioned frame while supporting the aforementioned reflector; and the aforementioned reflector has: the incident end face which is in close contact with the light guide plate The i-th plate-shaped portion at the end of the exit surface on the side and the second plate-shaped portion supported by the mirror support; and the second plate-shaped portion and the mirror support system are unevenly engaged and positioned. Printed by the Staff Welfare Committee of the Central Standards Bureau of the Ministry of Economic Affairs, a kind of flat light source device is a light source that emits light from a light source unit installed in a frame through a light guide plate and a light control plate in the frame. : The light source unit has: a rod-shaped light source arranged opposite to the incident end surface of the light guide plate; 3] 3〗 19 (revised version) 1235271 light guide = source, and guiding the light of the rod-shaped light source to the aforementioned failure Sheet metal processing mirrors at the entrance end face, and the mirror support body in the state of supporting the aforementioned mirrors; completed on the other side of the frame, on the rod-shaped light source described above, fitted to the outside, force 1, +, 丄 ^ A pair of ring-shaped members, this is a ring-shaped member between the paired ring-shaped members; in the manner of 嵌合, the rod-shaped light source system # is inserted into the ring-shaped lens. Noon support Fang Qufang 3. A flat light source device, which is the light source unit from the Anqi γ 忒 text in the frame; Second, = Light guide plate and light control in the second frame "The aforementioned light source unit has: A rod-shaped light source configured with the light-emitting end of the light guide plate opposite to each other. 2 the rod-shaped light source and a sheet metal processing mirror that guides the light of the rod-shaped light source to the incident end surface of the aforementioned V-light plate; and In the state, it is mounted on the mirror support of the aforementioned frame; the Staff Welfare Committee of the Central Standards Bureau of the Ministry of Economic Affairs printed on the rod-shaped light source 2 and fitted with at least a pair of ring-shaped members. A substantially cylindrical sexual member is fitted between them; the rod-shaped light source is supported by the aforementioned ring-shaped member and the approximately cylindrical elastic member inside the reflector. 4 · A planar light source device, The 313119 (revised version) I23527l light from the light source unit mounted on the frame is emitted in a plane shape through the light guide plate and the light control plate housed in the frame, which is characterized by: The unit includes: a rod-shaped light source arranged opposite to the incident end surface of the sodium light guide plate; and “receiving the rod-shaped light source and guiding the light of the rod-shaped light source to the incident end surface of the light guide plate by sheet metal processing and reflection A mirror; a mirror support body mounted on the aforementioned frame in a state supporting the aforementioned mirror; 〃 the side of the frame where the side of the side where the aforementioned light source unit is mounted is "concavo-convexly buckled on the mirror support body" hook. The planar light source device according to item 2 or 3 of the Erqing patent, wherein the frame is concave-convexly engaged with a hook formed on the reflector support with respect to the side of the side where the light source unit is installed. 6. An image display device comprising a flat light source device and an image display panel illuminated by the light emitted by the aforementioned flat source device. Its characteristics are printed by the employee welfare committee of the Central Standards Bureau of the Ministry of Economic Affairs. This is a flat light source device as described in the patent application. 7 ·: Species = display device, which is an image display panel equipped with a plane light source vibration set and illuminated by the light emitted by the aforementioned flat source source. Its characteristics are described as a flat light source device. ~ The paper scale M Α4-—313119 (revised version) 1235271 described in item 2 above 8 · A video display device, which is a light source device that emits light emitted from a surface light source device, and the aforementioned flat device ... The image display panel of the moon is characterized by the plane light source set by the plane light source. Ding Weishen §9 of the patent scope of the month of the 9 kinds of display display split, is prepared semi-amplified j_, equipped with thousands of surface light source device and the image display panel illuminated by the light emitted by the aforementioned flat Its characteristics · The planar light source device described in the second month is the planar light source device described in item 4 of the scope of patent application. 1 0. The display device of the sixth, seventh or eighth patent scope of the patent application, wherein, the square; the aforementioned frame of the planar light source device is provided with a concave-convex buckle on the side on which the light source sheet 7L is mounted. A hook formed on the aforementioned mirror support. Printed by the Staff Welfare Committee of the Central Bureau of Standards of the Ministry of Economic Affairs This paper is sized to the Chinese National Standard (CNS) A4 (2) × 297 mm 4 ΤΤ3ΤΓ5χΤ ^ ΠΓητ