TWI223115B - Surface light device, liquid crystal display device and reflective member - Google Patents

Abstract

The present invention provides a surface light device to prevent any generation of a bright line, so as to achieve uniform illumination, and make a surface light source compact and lightweight by enlarging an effective use region of an emission surface. In a surface light source, a segment 42 of a reflector 10 is formed by shearing, so that the corner of the segment 42 is sharply formed, and the segment 42 can be surely fitted in such a manner as to cover an edge 40 of a light guide plate 4. A rubber piece 13 disposed in a clearance 12 defined by one side face of the light guide plate 4 and a frame 2 presses the light guide plate 4 against the segment 42. An incident surface 7 of the light guide plate 4 is brought into close contact with the segment 42, so that the light of a fluorescent lamp 8 is shielded by the segment 42, thereby preventing any incidence of the light into the light guide plate 4 from the edge 41 of the light guide plate 4. Consequently, it is possible to prevent any generation of a bright line. Also, by providing a slant surface in front of the reflective mask surrounding the light source, so that the slant surface blocks/contacts the edge of the incident surface of the light guiding plate, the abnormal light emission can be prevented.

Description

1223115 A7 ___ B7 _ V. Description of the invention G) [Technical field to which the invention belongs] The present invention relates to a surface light source device, a display device, and a reflective member used in such devices. More specifically, in a surface light source device or a liquid crystal display device using a light guide plate, a technology for preventing uneven brightness and abnormal light emission from the light emitting surface of the light guide plate. The present invention can be applied to, for example, a liquid crystal display device used in a notebook computer or a navigation system, a surface light source device used for lighting a liquid crystal display panel thereof, or a reflection member used in the same. [Conventional Technology] It is well known to illuminate a liquid crystal display panel of a liquid crystal display device with a surface light source device. For example, it is widely used for image display of a notebook computer or a navigation system. Figure 21 is an example. Referring to FIG. 21, the surface light source device 101 used in the liquid crystal display device 100 includes a light guide plate 102 and a fluorescent lamp (primary light source) 104, which are arranged on the side opposite to one of the light guide plates 102. (Incident surface) ι〇3. A reflective sheet 105 is arranged on the back (lower) side 102 of the light guide plate 102, and a refractive sheet 106 is arranged on the side of the outgoing surface (top) 102b. Further, a reflector (reflecting member) 107 is disposed around the fluorescent lamp 104. The operation type of this type of surface light source device is well known. The light emitted from the fluorescent lamp 104 is introduced into the light guide plate 102 'through the incident surface 103, and is emitted from the emission surface i02b through the internal reflection of the back surface 102a and the emission surface 102b, the reflection of the reflection sheet 105, and the like. The direction of the emitted light is corrected by the refractive sheet 106 so that the front direction is directed toward the illuminated object (here, the liquid crystal display panel 108). One of the problems with these surface light source devices is through the exit surface 102b and the entrance 311534 ------------ (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 Economic Affairs 1223115 A7 V. Description of the invention (2) Entering the light guide plate 102 near the edge (also called the first edge) where the radiation surface 103 meets The light inside can easily cause uneven brightness and abnormal light emission. As shown in FIG. 22 (a), 'the light H passing through the first edge 110 is partially emitted from the exit surface near the incident surface 103, and an abnormality is easily caused on the exit surface 1 () 6a of the refractive sheet 106 opposite thereto. Glow. This abnormal light emission usually appears as a bright line lu parallel to the incident surface 103. These uneven brightness will significantly affect the quality of the outgoing light. When such emitted light is supplied to the liquid crystal display panel 108, the image of the liquid crystal display panel is hard to see. To avoid this disadvantage, the light in the exit surface 102b and near the entrance surface 103 can be blocked, and only the remaining area can be used as the actual illumination light output area. However, this method will narrow the effective light-emitting area. In addition, since the utilization efficiency of the light is also a cost, not the top, and the popular notebook computer needs to be lightweight, and it is not compatible with miniaturization. [Objective and Summary of the Invention] An object of the present invention is to provide an improved surface light source device which does not cause the above-mentioned problems, a liquid crystal display device using the same, and a radiation member used therefor. Specifically, the present invention is to provide a surface light source device that has no uneven brightness and has a large effective and light-emitting area, and uses the same as a liquid crystal display device and a reflective member used herein. First, a surface light source device suitable for the present invention includes: an exit surface having a light guide plate for outputting light; a back side facing away from the exit surface; an incident surface from which light is input from the side; formed on the exit surface and the incident surface The first edge of the meeting place is formed at the end on the opposite side of the incident surface (please read the precautions on the back before filling this page) -------- t ------- -Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, 1223115 A7 B7 V. Description of the invention (3) surface, a primary light source configured opposite to the aforementioned incident surface; and (Please read the note on the back? Matters before filling out this page ) A reflecting member configured to introduce light supplied from the primary light source into the incident surface, according to the present invention, the reflecting member includes a metal substrate and a reflective layer formed on an inner surface of the substrate, and the reflective layer and one of the substrates are formed After the cutting process, at least the aforementioned section that is fastened to the first edge is formed by it. With such a configuration, the segment of the reflective member is formed by cutting, and the corners of the segment of the reflective member are sharper than those of the segment of the reflective member formed by punching. Therefore, the segment portion of the reflecting member is fastened as if it covers the first edge of the light guide plate, and the segment portion is tightly attached to the incident surface of the light guide plate. As a result, the section of the light wave reflecting member of the primary light source is shielded, and light is prevented from entering from the first edge of the light guide plate to the inside of the light guide plate, and the aforementioned bright line-shaped abnormal light emission can be avoided. Printed by the Consumer Affairs Agency of the Intellectual Property Bureau of the Ministry of Economic Affairs. In general, a frame is often arranged to house the light guide plate, the secondary light source, and the reflective member. At this time, a gap is formed between the end surface and the frame to allow the thermal expansion of the light guide plate. In the gap, an elastic pressing device that allows the thermal expansion of the light guide plate to be arranged in the same way as the aforementioned section is pressed against the light guide plate. Better. In this way, when the elastic pressing device is provided, the incident surface of the light guide plate is elastically pressed by the section of the reflecting member. Even when the surface light source device is used for vibration or posture changes, the m of the light guide plate and the g portion of the reflecting member Zhang China National Standard (CNS) A4 Specification (21 × 297 Public Love, 311534, printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 4 ^ 23115 ___ Β7 V. Description of the invention (4 Z gap: if yes, The edges are indeed shielded by the reflection member sections, which can prevent the occurrence of non-uniform bright-line brightness unevenness. Furthermore, the gap between the light plate and the frame forms a gap between the thermal expansion film of the material light plate and the pressing device arranged in the gap. To be allowed to obey the light guide plate will not cause problems such as warping due to thermal expansion of the light guide plate. In addition, the metal base material in the section of the reflection member can withstand the pressing device to act on the light guide plate. _. Reflective members made of materials other than the combination of a metal substrate and a reflective layer can also be used. Usually, a reflective sheet is arranged along the back of the light guide plate, but the reflective sheet can surpass the exit surface. It is preferable that the second edge that meets the back surface protrudes toward the light source side. This can also prevent the uneven brightness caused by the light entering through the second edge. Furthermore, the pressing device and the frame can be prevented. The surface is preferably colored black or gray. This is because the surface of the aforementioned pushing device or the aforementioned frame is effective for sealing that may cause harmful reflected light. Also, the light emitted from the end surface of the light guide plate is in the pushing device and The black or gray colored part of the frame is absorbed, and there is no difference in the brightness of the emitted light between the tight part of the pressing device of the light guide plate and the non-tight part of the pressing device. The corner of the aforementioned section of the reflecting member is formed as a radius of curvature J "A slightly circular arc shape below m is preferred. With this type, the gap between the section of the reflective member and the incident surface of the light guide plate is particularly difficult to produce. As a result, the possibility of light entering the edge of the light guide plate from this gap When the light guide plate is formed by injection, the corner of the light guide plate generally has a slightly arc shape with a radius of curvature of 10 V m or more. Therefore, the corner of the light guide plate is fastened 311534 -------- t ·! — ^ ---- (Please read the note on the back? Matters before filling out this page) Line i 1223115 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. The corner of the paragraph of the description of the invention (5) When the portion is below 10 // m, the segment portion can be surely tightly contacted with the incident surface of the light guide plate. The present invention can also be applied to a liquid crystal display device. At this time, a liquid crystal display panel equipped with a liquid crystal display device will follow the present invention as above Illumination by the improved surface light source device. The advantages of the improved surface light source device (elimination of uneven brightness) are, of course, reflected in the liquid crystal display device using this illumination, achieving an image display that is easy to watch without uneven brightness and darkness. The invention is also applicable The reflecting member is important for the above improvement. That is, the present invention is applicable to the light guide plate including an exit surface, an entrance surface provided on the back surface and an end surface, and an edge where the exit surface meets the incident surface, and is configured to surround the incident surface. The surface is a reflecting member that provides a light source. According to an improvement of the present invention, the reflection member is provided with an end portion which is blocked on the emission surface and the back surface, and includes a metal substrate and a reflection layer formed on an inner surface side thereof, and the reflection layer and the substrate are cut by cutting A part 'forms a section which is engaged with the edge. The reflecting member thus configured is provided with a sharp section formed by cutting, and is fastened to the light guide plate incident surface while being fastened to the light guide plate to cover the first edge, thereby effectively preventing light from entering the light guide plate. According to another aspect of the present invention, an improved surface light source device includes: a light guide plate having an exit surface for outputting light; a back facing away from the aforementioned exit surface

Plane, the incident surface of the input light from the side, and the first edge formed at the meeting point of the exit surface and the front incident surface; don't K is a primary light source arranged on the aforementioned incident surface; _ ^ the aforementioned primary light source is relative to the aforementioned incident Face protection animal · M's scale is applicable to China National Standard (CNS) A4 size coffee x Nogong Ai ^ --- 1,000, 5 311534 ---------------- ----- Order --------- Line j (Please read the phonetic on the back? Matters before filling out this page) A7 Five Inventions (6 Features of Printing and Improvement of Employees' Cooperatives in the Intellectual Property Bureau of the Ministry of Economic Affairs It is as follows: The holding member 'used here is broadcasted from the aforementioned first edge, and is provided with a metal plate to form the first edge. Moreover, the light h provided by the bending process can be used to reflect the aforementioned secondary light source. The holding member described in "J" can also constitute a part of a frame that holds the aforementioned light guide plate and other components into a body. The surface light source device thus improved is used for the illumination of a liquid crystal display panel, and an improved liquid crystal display device can be provided. After these improvements, the light shielding of the first edge of the light guide plate can also be achieved. Bright line-shaped uneven brightness caused by the light entering the light guide plate at the edges [a brief description of the figure] FIG. 1 is an exploded perspective view of a surface light source device according to an i-th embodiment of the present invention. Figure AA is a cross-sectional view. Figure 3 is a cross-sectional view of the periphery of the primary light source enlarged in the surface light source device shown in Figure 2. Figure 4 is a detailed view of the reflector. (A) is a front view of the reflector, (b) This is an enlarged view of part B in (a). Fig. 5 shows the use of the rubber sheet of the surface light source device. (A) is an enlarged view near the right end of the surface light source device in Fig. 2, and (b) is a rubber sheet. An oblique view. Fig. 6 is a diagram of the fastening state of the segment and the light guide plate. It is an explanatory diagram of the fastening state of the segment and the light guide plate of the present invention, (b) is the fastening of the segment and the light guide plate ---- --------% (Please read the notes on the back before filling this page)

n n n I order · !! ----- line; This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

311534 Printed by the Consumer Affairs Cooperative of the Intellectual Property Office of the Ministry of Economic Affairs 311534 1223115 A7 --- —_B7 _______ V. Description of the invention (7) An illustration of a bad condition. Fig. 7 is an exploded perspective view of a surface light source device according to a second embodiment of the present invention. Fig. 8 is a sectional view taken along the line c-c in Fig. 7. Fig. 9 is an enlarged view of a periphery of a light source in the surface light source device shown in Fig. 8. Fig. 10 is a front view of a second example of a reflector according to the present invention. Fig. 11 is a view showing the use state of the rubber sheet of the surface light source device according to the second embodiment of the present invention. U) is an enlarged view of the right end of the surface light source device of Fig. 8 (b) is a perspective view of a rubber sheet. Fig. 12 is a sectional view of a surface light source device according to a third embodiment of the present invention. Figure 12 is an enlarged view of the left end of Figure 12. Fig. 14 is a diagram showing a surface light source device according to a modification of the first embodiment of the present invention. (A) is an enlarged sectional view of a main part of the surface light source device, and (b) is an enlarged view of a part of a reflector. Fig. 15 is an enlarged sectional view of a main part of a surface light source device according to a modification of the second embodiment of the present invention. Fig. 16 is an enlarged sectional view of a main part of a surface light source device according to another modification of the first embodiment of the present invention. Fig. 17 is an enlarged sectional view of a main part of a surface light source device 231 according to another modification of the second embodiment of the present invention. Fig. 18 is a plan view of a first application example of the pressing device. ^ The second application example of the pressing device on the 19th (a) is along the DD of (b). This paper 297 public f- —— (Please read the precautions on the back before filling this page) --- ---- I order! I ---- line one 1223115 A7 jade, description of the invention (8) ^ ~-sectional view, (b) # ^ &, 糸 as a pressing device and press the rubber sheet Can 20th, state sectional view. The third application example of the Guma pushing device. (A)

The cross-sectional view of the line is / b. (B) E-E (Please read the precautions on the back before filling in this page) (b) This is a picture of the rubber sheet installed as a pushing device. Fig. 21 is a cross-sectional view illustrating a conventional surface light source device. Fig. 22 is an explanatory diagram of a situation where abnormal light emission occurs in a use case. (&Amp;) is a cross-sectional view in which the vicinity of the light source in FIG. 21 is enlarged, and (b) is a view in the G direction in (a) illustrating the situation. Fig. 23 is an enlarged sectional view of a periphery of a primary light source of a surface light source device according to a sixth embodiment of the present invention. Figure 24 is a schematic exploded perspective view of the surface light source device shown in Figure 23. Fig. 25 is a sectional view of a reinforcing material used in the surface light source device shown in Fig. 23. Fig. 26 is an enlarged sectional view of a surface light source device according to a seventh embodiment. Fig. 27 is an enlarged cross-section of a surface light source device according to the eighth embodiment. Fig. 28 is a cross-sectional view illustrating the advantages of the sixth to eighth embodiments by enlarging the periphery of the light source of the conventional surface light source device. [Explanation of Symbols] 1, 61, 91, 201, 211, 221, 231, 301, 311, 341 Surface light source device 2, 62, 94, 96, 305, 312, 332 Frame 3, 92 Reflector This paper size applies Chinese National Standard (CNS) A4 size (210 X 297 mm) 8 311534 1223115 A7 B7 V. Description of the invention (9) 4,302,314 Light guide plate cymbal light guide plate fluorescent lamp (primary light source) Reflector light guide plate gap surface rubber sheet (pressing device) LCD Display device (image display unit) Printed on the first edge of the light-emitting surface of the metal base reflective layer. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5 7 8,306,324 10,64 11 12? 65 13,66,93 23 27 32 40 41 42,78,81 44,83,95,97 51,84 80 92a 98 305A, 320A 323 R1 [Explanation in the figure] Figure 23 (Please read the precautions on the back before filling this page) Push Pressing device housing part Image display device Second edge end plate-shaped spring member (pressing device) Frame body rubber bushing corner 3 11 Side-light surface light source device This paper applies Chinese national standard (CNS) A4 Specifications (210 X 297 mm) 9 311534 1223115 Warp Intellectual Property Office employee consumer cooperative the A7 printed 10 V. [301] embodiment of the invention described side-lighting type surface light source device of the invention (10) 24 3 11 FIG side-lighting type surface light source device 28 of FIG brother

The embodiments will be described below with reference to FIGS. 1 to 20 and 23 to 28. Also in the drawings, the dimensions, shapes, etc. of each element are exaggerated as needed to facilitate understanding. V [First Embodiment] Figs. 1 to 3 are schematic diagrams of the side light type surface light source device 1 according to this embodiment. Fig. 1 is an exploded perspective view of the surface light source device, and Fig. 2 is a sectional view taken along line A-A. Fig. 3 is a partially enlarged view of Fig. 2. Referring to these figures, a reflective sheet 3, a light guide plate 4, a prism sheet 5 and a protective sheet 6 are sequentially stacked and housed in a frame 2 having a substantially rectangular shape. A fluorescent lamp (primary light source) 8 is disposed opposite to one side (incident surface) 7 of one side of the light guide plate 4. The fluorescent lamp 8 is housed in a metal reflector (reflection member) 10 fixed to the frame 2. In addition, a gap 12 between the side surface (terminal surface) 11 and the frame 2 on the opposite side of the incident surface 7 of the light guide plate 4 accommodates one pair of rubber sheets that push the light guide plate 4 to the fluorescent lamp side 8 (Boosting device) 13,13. The frame 2 can be projected from a white synthetic resin into a slightly rectangular shape. The metal reflector 10 is fixed to the other end E1. A metal support plate 14 is fixed to the end portion E2 with respect to the reflector 10. Here, the frame 2 is provided with: the first side 15 fixed reflector 10; the first side 15 intersects with the end of one of the first side 15 at a slight right angle; the third: the K paper size applies the Chinese National Standard (CNS) A4 specifications (210 X 297 male shame) ~ '311534 ---------------- Order ------- line j {Please read the precautions on the back before filling in this page } 1223115 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7-~ ---_ V. Description of Invention (u) ~ 17 and the other end of the first side 15 at a right angle cross; and the fourth side 18 Intersects the second side 16 and the third side 17 at a slight right angle. On the inside of the second side 16 and the third side π, a tongue piece 20 is formed to support the lower surface 3a of the reflection sheet 3. In addition, at both end portions of the first side 15, 0 forms a pair of reflector fixing portions 21. A pair of support plate fixing portions 22 are formed at both ends of the fourth side 18. ; On the other hand, the peripheral edge of the upper portion of the frame 2 forms a panel engaging portion 24, and stores a liquid crystal display panel (image display portion) 23. Furthermore, the "1" and "2" sides of the frame 2 respectively form the first fastening portion 25 and the reflector, and the second fastening portion 26 and the support plate 14. The reflector 10 is as special as the first Figure 4) (1)), as shown in detail, is made of a metallic base material 27 such as stainless steel or aluminum alloy, and a reflective layer 32. The reflective layer is formed on the entire area of the inner surface of the base material 27, and an adhesive, aluminum 3 〇 and synthetic resin film (eg, PET) 31. And the mask 10 is composed of: the base 34 on the first side 15 side of the frame 2 reflector fixing portions 21, 21, fixed by screws 33, 33; standing wall The portion 35 is erected from the base portion 34; and the flange portion 36 is formed from the vertical wall portion 35 and the base portion are bent slightly parallel to the light guide plate 4. Thus, the lower base portion 34 forms an upper flange portion 36. It is long and closely contacts the lower surface 3a side of the reflection sheet 3, and it can stably support one end side of the reflection sheet 3, the light guide plate 4, the refractive sheet 5 and the protection sheet 6. In addition, the upper flange portion 36 is provided with a panel support. The surface portion 37 is a surface side supporting the liquid crystal display panel 23; and the light guide plate holding portion 38 is formed by bending from the panel support surface portion 37. This paper size applies to + National Standard (CNS) A4 specification (210 X 297 public love ^ " ^ -------- order --------- line (please read the note on the back first) (Please fill in this page again for item P) Ϊ223115 Printed by A7 B7, Consumer Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs 5. Description of the invention (12) The light guide plate holding portion 38 is located on the light guide plate 4 exit side 40. Also, the light guide plate is pressed. The living part 38 forms a section part 42 which is fastened to an edge (first edge) 4m where the incident surface 7 and the exit surface 40 of the light guide plate 4 meet. The section part 42 is composed of the reflective layer 32 of the reflector 10 and a metal base. It is formed by cutting one part of the material 27. It forms a sharp buckle to the edge 4 i of the light guide plate 4 and is in close contact with the incident surface 7. That is, the corner part of the 'section part 42' is shown in FIG. 6 (a). The edge 41 of the light guide plate 4 is formed into the same shape as the light guide plate 4 by cutting, or the edge 41 is not blocked. The edge 41 of the light guide plate 4 is formed by injection molding. The chamfered round edges generally form a slightly circular shape with a radius of curvature of 10 "m or more. In contrast, the corner portion R1 of the segment portion 42 is formed into a slightly circular shape with a size of 10 // m or less. The section 42 of the reflector 10 formed to this extent is easily in close contact with the incident surface 7 of the light guide plate 4 without gaps. Therefore, the edge 41 is completely shielded at the section 42 and the fluorescent lamp 8 The light stone is incident on the inside of the light guide plate 4 through the edge 41 of the light guide plate 4. Therefore, the bright line generated by entering the light through the edge 41 is prevented. When the corner portion R1 of 42 forms a milder curvature than the edge 41 of the light guide plate 4, a gap is likely to be generated between the segment portion 42 and the incident surface 7, which is not suitable. As a result, the light from the fluorescent lamp 8 enters the vicinity of the edge 41 of the light guide plate 4 and there is a possibility that a bright line may occur. In addition, as shown in Figs. 1 to 3 and 5, in the segment portion 42, the incident surface 7 is pressed by the elastic force (F) of the rubber sheet 13. FREE +, 丄 ν} ^ ^ In this case, if vibration is applied to the surface light source device 1, or the posture of the surface light source device has 3 changes, the M's scale is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297) Love) " " 311534 --------------------- Order -------- (Please read the notes on the back before filling this page) Line 12 1223115 A7 V. Description of the invention (13) The close connection of the segment 42 to the incident surface 7 You can add π ^ "can still be turned. The read side 41 squat armor segment 42 is light-shielded, which can really prevent the cause from Corner ο,-, bright lines. The incident light is between the frame 2 and the center end of the light guide plate 4 to store the thermal expansion of the light guide plate 4. A pair of rubber sheets 13, 13 are housed in the gap 12 The rubber sheet 13 has a slightly L-shaped cross section, and the buckle I lifting part 43 fits the mouth of the receiving part (reinforcement device receiving part) formed in the frame 2. The rubber sheet 13 is fixed to the frame 2 without leaking. On the one hand, when the guide 4 is heated, the rubber ^ will elastically change to absorb the deformation of the light guide plate 4 and prevent the light guide plate 4 from warping. The reflector "is fixed to the frame 2 and the base 34 has a frame structure of the frame 2 It also supports the reflection sheet 3, the light guide plate 4 and the refractive sheet 5 to strengthen the frame 2. 'If so, the frame 2 can be designed as a wall and lightweight due to the reinforced portion of the reflector 10. X, reflective The cover 10 is composed of the base portion 34, the flange reflection sheet 3, and the light guide plate 4, so there is no need to form a portion that holds the reflection sheet 3 and the light guide plate 4 on the side of the frame 2. From this point, the frame 2 can also be obtained. Simplified and miniaturized. The support plate 14 is formed like a reflector 10. The support plate 14 is formed of a metal plate such as stainless steel or aluminum alloy with a slightly L-shaped cross section (refer to Fig. 1). The support plate fixing portion ㈣ on four sides and 18 sides. Here, the support plate 14 is fixed to the support plate fixing portion 22, and the base portion 46 is provided to support the lower surface 3a of the reflection sheet 3, and the back plate portion 47 is fastened to the erected from the base portion. Outside of the fourth side 18. In this way, the support plate 14 and the frame 2 *

..... He 4 JQ This paper size is applicable to China National Standard (CNS) A4 (21〇X 297mm) ----__ 13 311534 ------------- (Please Read the notes on the back before filling out this page} Order --------- Line j Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 14 1223115 A7 ---- --- 2Z___ V. Description of the invention Q) Become an integral reinforcing frame 2 and cooperate with the function of the aforementioned reflector 1G to easily obtain the thinning and miniaturization of the frame 2. The reflection sheet 3 is formed of a white PET sheet with high quality reflection, and returns the light emitted from the back (lower) 48 of the light guide plate 4 to the light guide plate 4. In addition, a surface facing the back surface 48 of the light guide plate 4 of the reflection sheet 3 may be formed as a dot-like paint layer for diffusion or an enemy surface, if necessary. The light guide plate 4 is manufactured by injection molding of a synthetic resin such as acrylic resin. The exit surface 40 has a substantially rectangular shape, and the cross-sectional shape is a slightly wedge shape. The entrance surface 7 is located on the thick wall side. In addition, the incident surface 7 may be roughened, the amount of emitted light near the incident surface may be adjusted, and the phenomenon of the emergence of bright and dark emitted light (so-called reflection phenomenon) may be suppressed repeatedly. In addition, the light-emitting surface 40 and the back surface 48 may be selectively adhered with a light-diffusing ink (such as magnesium carbonate, titanium oxide, or the like as a pigment ink), or a wrinkled surface may be formed in part, and the light may be diffused to adjust the amount of light emitted. The refracting sheet 5 is formed of a light-transmitting sheet such as polycarbonate (PC), and the face (lower surface) facing the light guide plate 4 forms a plurality of continuous refracting faces 50 having a substantially triangular cross-section. In addition, the refractive surface 50 of the refractive sheet 5 extends in a direction slightly parallel to the incident surface 7 of the light guide plate 4 and corrects the light emitted from the light guide plate 4 in order to effectively illuminate the liquid crystal display panel 23 in a plane shape. The protective sheet is formed of a light-transmitting sheet such as polycarbonate to protect the exit surface of the refractive sheet 5, but a wrinkled surface for light diffusion or the like may be formed to diffuse the emitted light. Here, in order to constitute the image display device 51, a liquid crystal display panel (image display portion) 23 is housed in the panel fastening portion 24 of the frame 2, and the liquid crystal display surface can be adapted to the Chinese national standard (CNS) A4 specification ( 210 X 297 mm) ------ 311534 ----------------- (Please read the precautions on the back before filling out this page) 1223115 Employee Consumption of Intellectual Property Bureau, Ministry of Economic Affairs Cooperative printed A7 V. Description of the invention &) The plate 23 is assembled on the frame 2. In the surface light source device configured as described above, when the glory lamp 8 is lit, its light is directly guided to the incident surface 7 through the reflection of the reflector 10 and introduced into the light guide plate 4. As is well known, this incoming light is transmitted in the light guide plate and is gradually emitted from the exit surface 40. The emitted light passes through the protective sheet 6 in the correcting direction of the refractive sheet 5, and then illuminates the liquid crystal display panel 23 in a planar shape. The advantages of the surface light source device according to this embodiment are as follows. (1) The section 42 of the reflector 10 is fastened to the edge 41 of the light guide plate 4 and is in close contact with the incident surface 7 ′. Therefore, the fluorescent lamp faces the edge 41. The section 42 of the light wave reflector 10 of 8 is shielded. As a result, no light enters the light guide plate through the edge 41, and bright lines can be prevented from occurring. (2) From this, the exit surface can be widely and effectively used. That is, the miniaturization of the light guide plate 4 and the frame 2 is replaced by the widening part, and the entire device can be miniaturized and lightened. (3) A part of the reflecting layer 32 and the metal base material 27 of the reflector 10 is cut to form a section 42 where the incident surface 7 near the edge 41 is pressed by the elastic force of the rubber sheet 13 . Therefore, the elastic force of the rubber sheet 13 acting on the light guide plate 4 can be absorbed by the metal base material 27 of the segment portion 42. This prevents the reflection layer 32 from being peeled off due to the friction of the light guide plate 4. [Second Embodiment] Figs. 7 to 9 are outlines of the side light type surface light source device 61 according to this embodiment. Fig. 7 is an exploded perspective view of the surface light source device 61, Fig. 8 is a cross-sectional view taken along the line C_C in Fig. 7, and Fig. 9 is a partially enlarged cross-sectional view of Fig. 8. In addition, for the components applicable to the first embodiment, this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) is 13 311534 -------- order ------- -Line I (Please read the notes on the back before filling out this page) 1223115 Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 16 A7 V. Description of the invention (16) The same symbols are used to omit repeated descriptions. In these figures, the reflective sheet 3, the light guide plate 4, the refractive sheet 5 and the protective sheet 6 are housed in this order in a frame 62 formed in a substantially rectangular shape. A fluorescent lamp (primary light source) 8 is disposed on the incident surface 7 side of the light guide plate 4. Both ends of the fluorescent lamp 8 are detachably fixed to the frame body 63 of the frame 62. The periphery of the fluorescent lamp 8 is covered by a reflector 64, and the light of the fluorescent lamp 8 is reflected by the reflector 64 and introduced into the incident surface 7. A pair of rubber pieces 66 are arranged in a pressing device for pressing the light guide plate 4 toward the fluorescent lamp 8 at a gap 65 between the end of the light guide plate 4 and the frame 62. The frame 62 is formed by injection molding of a white synthetic resin. The frame 62 is provided with the frame 63 made of a synthetic resin having a slightly rectangular shape; the projections 67 and 68 support the reflection sheet 3 and the like from below; and the plate member 7 2 is fixed to the upper surface of the frame 6 3 by screws 7 丨 and 7i. Notch 7 〇. Then, panel fastening portions 73 and 74 are formed on the upper surfaces of the frame body 63 and the plate member 72, and these are engaged with the liquid crystal display panel (image display portion). The reflector 64, as shown in Fig. 10, surrounds the fluorescent lamp 8 and is formed of a metal material 27, such as stainless steel or aluminum alloy, which is formed in a slightly u-shape, and a reflective layer 32. The reflective layer 32 is a structure formed on the inner surface of the base material 27 in this order by an adhesive 28, silver 30, and a synthetic resin film 31. The reflector 64 is housed in the frame 62 together with the fluorescent lamp 8 (see FIG. 4 (b)). The upper end portion 75 of the reflector 64 opening is connected to the exit surface 40 of the light guide plate 4, and the lower end portion 76 of the reflector 64 opening is connected to the back surface 48 of the light guide plate 4. The lower end% of the reflector 64 is supported by the protruding portion 68 of the frame 62. This paper size applies to China National Standard (CNS) A4 specification (210 X 297 public love) 311534 --------------------- Order -------- -Line 1 (Please read the precautions on the back before filling out this page) 1223115 Printed by A7, Consumer Cooperatives, Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of Invention (Π) At the upper end 75 of the reflector 64, it is fastened to the incident surface and The edge (first edge) 41 of the outgoing surface 407 °, and the section 78 is formed in close contact with the incident surface and is connected to the lower end portion 76 of the reflector 64, and is fastened to the incident surface 7 and the back surface 48. The edge (the second edge) is 80, and the shaped section part 81 hits the shooting surface 7. The two sections 78, 81 are like the application form, they are reflective layers "and one of the shears metal members 27 is fastened to the edges 41, 80 'and is sharply formed to closely contact the incident surface 7 ... as in item 7 and 8 As shown in Figure 11 and Figure 11, at the two sections 78, 81 of the reflector 64, the projection surface 7 is pressed by the elastic force of the rubber sheet 66. As a result, the surface light source device is "vibrated" or changes its posture. At this time, the upper and lower edges 41 and 80 can still maintain the state where the sections 78 and 81 of the reflector 64 are constantly shielded from light. Therefore, bright lines due to light incident from the upper and lower edges 41 and 80 can be reliably prevented. Here, the rubber sheet 66 is formed with a round rod-shaped engaging projection 82 on the back surface side. This engaging protrusion 82 is engaged with the accommodating portion 83 formed by the frame 62, and is fixed so as not to fall off from the frame 62. The rubber sheet 66 is elastically deformed when the light guide plate 4 is thermally expanded, and can prevent warping of the light guide plate 4 in advance. In the surface light source device 61 thus constituted, the upper and lower edges 41 and 80 are shielded by the sections 78 and 81 of the reflector 64, and it is possible to prevent bright lines from occurring due to light incident from the upper and lower edges 41 and 80. As a result, it is possible to prevent the occurrence of bright lines more effectively than in the first embodiment in which only the edge 41 of the light guide plate 4 is shielded. As a result, the area of the exit surface that can be effectively used can be enlarged, and the overall device can be miniaturized and lightened accordingly. Here, the liquid crystal display is stored in the panel fastening parts 73 and 74 of the frame 62 ---------- ^ --------- (Please read the precautions on the back before filling this page) Private Paper size applies to China National Standard (CNS) A4 (210 X 297 public love) 17 311534 23 Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 2

V. Description of the invention (18) A panel (image display section) 23. This liquid crystal display panel 23 is assembled on a frame 62 'to form planar illumination light emitted from the surface light source device 61 and display an image on the liquid crystal display panel 23. Of the image display device 84. [Third Embodiment] Figures 12 and 13 are schematic diagrams of a side-light type surface light source device 91 according to a third embodiment. It should be noted that each element common to the i-th embodiment or the second embodiment is given the same reference numeral, and redundant description is omitted. The surface light source device 91 'has a structure similar to that of the first embodiment, but some methods are added to the reflection sheet 92 arranged along the back surface 48 of the light guide plate 4. That is, the end portion 92a of the reflecting sheet 92 projects beyond the second edge 80 where the back surface 48 meets the incident surface 7 and protrudes from the side of the fluorescent lamp 8 (left side in the figure). In this way, the shading of the second edge 80 is sure. The first edge 4 i is similar to the first embodiment in that light is shielded by the section 42 of the reflector 10. As a result, the shading of the two edges 41 and 80 is reliable. From this point of view, it is more effective to prevent the occurrence of bright lines than to shield the first edge only in the first embodiment. Correspondingly, the effective light-emitting area is enlarged, which makes it easy to reduce the size and weight of the device. [Fourth Embodiment] Figs. 14 and 15 are schematic diagrams of a side light type surface light source device according to a fourth embodiment. The surface light source devices 201 and 211 shown in Figs. 14 and 15 correspond to a modification of the first embodiment and a modification of the second embodiment, respectively. Referring to Fig. 14, the light guide plate holding portion 38 of the reflector 10 of the surface light source device 201 is composed of a first portion 38a and a second portion 38b. The first part 38a is a panel support surface 37 of the reflector 10. The previous paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 311534 -------- Order --------- line (please read the precautions on the back before (Fill in this page) 18 IZZ0115 A7 V. Description of the invention (19) At least the lower end edge 39a of the end face 39, even f-including the whole area of the king, forming a fork connected to the incident surface 7 〇 (Please read the precautions on the back before filling this page ) The P knife 38b is fixed on the i section 38a with a joint or an adhesive and is blocked by the exit surface 40, so the section 39 formed by the end face 39 and the second section | 38b before the i section W is buckled合 First edge 41. According to this structure, the front end surface 39 blocks the incident edge 41 via the first working portion that is connected to the incident surface 7 ... The light of the incident edge 41 is blocked only as in the i-th embodiment to prevent the occurrence of bright lines. Further, as shown in the detailed view in FIG. 14 (b), the corner portion R1 of the segment portion 4 having the i-th portion 38a and the second portion 働 is formed at an acute angle of a slight right angle, and is shielded by the edge 41 of the segment portion 42. If the corner portion R1 is formed as an obtuse angle, as shown in FIG. 6 (a) (b), light shielding by the edge 41 of the segment portion 42 may be unstable and unfavorable. The technique shown in Fig. 14 is as shown in Fig. 15 and can also be applied to the second embodiment. That is, the upper end portion of the reflector 64 is formed by the first portion 75a and the second portion 75b, and the lower end portion 76 is formed by the first portion 76a and the second portion 76b. The Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs printed "The first edge 75a of the first part 75a at least the lower end edge 79a, and even the whole world access to the projection surface 7" to block the light incident on the first edge 41 and the second edge 80 . Therefore, an effect similar to that of the second embodiment can be obtained. Further, as shown in Fig. 15, the second portion 75b of the upper end portion 75 is blocked by the exit surface 40, and the second portion 76b of the lower end portion 76 is blocked by the back surface 48. The front end 79 before the first part 75a and the second part 75b form a section 78, and the front end 79 before the first part 76a and the second part 76b form a section 311534. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) " '1223115 V. Description of the invention (20) 81 〇 [Fifth embodiment] (Please read the precautions on the back before filling out this page) Figures 16 and 17 are related to the $ implementation Outline of edge light type surface light source device. Fig. 16 'The surface light source devices 221 and 231 shown in Fig. 17 correspond to the modification of the first embodiment and the modification of the second embodiment, respectively. Referring to Fig. 16, the light guide plate holding portion 38 of the reflector 10 of the surface light source device 221 is formed of a first portion 38a and a second portion 38b. The segment portion 38c of the second portion 38b is fixed to the front end of the first portion 38 by welding or bonding. Then, 'the front end 39 (section 42) before the first part 38a is in surface contact with the incident surface 7, or at least the lower edge 39 & of the front end surface 39 (section 42) is in line contact with the incident surface 7, and the first The light from the edge 41 is incident. Further, the second portion 38b is blocked from the emission surface 40. According to this structure, it is connected to the incident surface 7! The part 38 & front end surface 39 shields the first edge 41 and prevents the occurrence of bright lines, that is, the same effect as that of the first or fourth embodiment can be obtained. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, so that the section 38c of the second section 38b is connected to the front end of the j section 38 & The lower part can be welded or bonded, so the fixing operation of the first and second parts 38a and 38b can be easily performed. " Knife, the technique shown in Fig. 16 can also be applied to Fig. 17 of the second embodiment as an example. Referring to Fig. 17, the reflector 64 ~ 丄 口 口 P 7 5 is composed of __ first part 75a and second part 75b, and the lower end part 76 is free. This paper is in accordance with Chinese National Standards (CNS) A4 regulations 1 (210 X 297 mm Γ ------_ Ertiandi 1 311534 1223115 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 21 A7 V. Description of the invention (21) ~ Part 76a and Part 2 76b In a state where the front end of the i-part 75 & is fastened to the segment part 75c of the second part 75b, the i-part and the second part 75b are connected and fixed. Furthermore, the front part of the first part 76a is fastened to the second part In the state of the section 76c of the 76b, the first part 76a and the second part / minute dowel are welded and fixed. Furthermore, the end face 79 before the first part 75a is in plane contact with the incident surface 7, or before the first part 75a The end edge 79a below the end surface 79 is in line contact with the incident surface of the light guide plate 4. In addition, the end surface 79 before the i-section 76a is in surface contact with the incidence surface 7, or the end edge 79b below the end surface 79 before the first section 76a is in contact with the incidence surface. 7. Make a line contact. As a result, the light incident on the first edge 41 and the second edge 80 is incident on the front ends of the first portions 75a and 76a. 79 is cut off. Therefore, the same effect as in the second embodiment can be obtained. In addition, the second portion 75b of the upper end portion 75 is blocked to the exit surface 40. The second portion 76b of the lower end portion 76 is blocked to the back surface a. The front end surface 79 of the first portion 75a and the second portion 75b form a segment portion 78, and the front end surface 79 of the first portion 76a and the second portion 76b form a segment portion 81. [Other modifications of the first embodiment to the fifth embodiment] The first to fifth embodiments described above do not limit the gist of the present invention, for example, the following deformations are allowed. (1) In each embodiment, a pair of rubber sheets 13, 66 are arranged as a pressing device. However, it is also possible to use other types of pushing devices. For example, as shown in FIG. 18, the side opposite to the light guide plate end Π in the frames 2 and 62 is bent toward the same side 11 side, and the elasticity of the bent side will be the same. The surface 11 is pushed on the fluorescent paper. The size of this paper is applicable to China National Standard (CNS) A4 (210 X 297 mm) " 311534 -------------------- Order --------- Line (Please read the precautions on the back before filling this page) 1223115 A7

The light side (left side in the figure) is also available. (Please read the precautions on the back before filling in this page.) The shapes of the rubber sheets 13, 66 as the pressing device are not limited to the shapes of the first and second embodiments. As long as the light guide plate 4 can be pressed toward the fluorescent light & side, and the thermal expansion of the light guide plate 4 can be absorbed, for example, as shown in the figure, an angular rod shape can be used. At this time, a part of the angular rod-shaped rubber sheet 93 is pressed into the spring accommodating part 95 formed in the frame 94, and the rubber sheet 93 may be fixed to the frame 94. As the pressing device, as shown in FIG. 20, a metal or a plate-shaped spring member 98 is used, which is curved in an arc shape toward the distal end side, and is accommodated in the receiving portion 97 of the frame 96. (2) In each of the above embodiments, the light guide plate 4 having a slightly wedge-shaped cross section is used. This does not limit the invention. For example, a light guide plate in which the exit surface 40 and the back surface 48 are formed in parallel, or another light guide plate with an appropriate cross section can also be used. (3) In each of the above embodiments, the primary light source is a fluorescent lamp 7. However, this does not limit the present invention. For example, light emitting diodes may be arranged in a row as a primary light source. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs (4) In each of the above embodiments, one refracting sheet 5 is arranged on the light-emitting surface 40 side of the light guide plate. However, it is also possible to arrange the refractive sheet in other forms, and to arrange other additional sheets such as a light diffusion sheet. For example, two refraction sheets are arranged, and the refraction rows intersect at right angles to each other. As far as it can be seen from the description, in order to avoid the occurrence of bright lines, it is necessary to ensure that the edges (especially the first edges) on the incident surface of the light guide plate are shielded. Therefore, the example of the first edge of the light-shielding plate that is slightly different from the above-described embodiments will be described in the sixth embodiment below. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) 22 311534 1223115 A7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (23 These-group implementation forms jointly achieve important tasks It is to maintain the slope formed near the front end of the component of the primary light source. Using the function of this slope, the dish can block the -edge, which can effectively prevent the occurrence of bright lines. The following embodiments are described using a surface light source device, but as It is needless to say that each of the previously described embodiments' can be arranged as a liquid crystal display panel and constitutes a liquid crystal display device. [Sixth Embodiment] The outline of the side-light type surface light source device according to this embodiment is shown in an exploded perspective view of FIG. 24. The surface light source device 311 is further equipped with a combination of a reflection sheet 313, a light guide plate 314, a light diffusion sheet 317, a refractive sheet 315, 316, and a protection sheet 318 in a frame 312 configured with a primary light source. The reflection sheet 313 is made of a white PET film or the like. A sheet-like random reflection member. The reflection sheet 313 reflects light leaked from the back surface 314C of the light guide plate 314 and then enters the light guide plate 314 'to prevent light loss. The light guide plate 314 is the same material and shape as the light guide plate 4 described above. One end surface provides an incident surface 314A, and the two main surfaces provide an exit surface 314B and a back surface 314C. In addition, according to a well-known technology, the exit surface 314B and the back surface 314C are provided. Either or both of them may be light-scattering 彳 b-types that promote the formation of various forms of light emission. Light-scattering 彳 b-types are well-known and have no special relationship with the features of the present invention, and their descriptions are omitted. Refractive sheets 315 and 316 are well-known For the light emitted from the exit surface 314b pointing obliquely, the relevant direction correction effect is provided in the plane parallel to the incident surface 3 14A and in the vertical plane to provide the light emitted in the generally front direction. Instead of the refractive sheet 315 316, the so-called double-sided refractive film can also be used in this paper size China National Standard (CNS) A4 specifications (210 X 297 mm) 23 311534 (Please read the precautions on the back before filling this page) ----- --- Order --------- Line 115 115 3 2 2 A7 V. Invention Description (24) Pass the same effect. However, the structure and function of the refraction film Xiyou Youyue are well known, and they are related to The features of the invention are not particularly relevant and are omitted Note: The light diffusion sheet 317 is diffused from, (Please read the precautions on the back before filling in this page) Goor takes out the light from the exit surface 314B, and at the same time seeks for the uniformity of X, it will make the slight brightness uneven and unobtrusive. The protective sheet 318 is a faint light diffusing sheet, which can protect the surface of the wave diffusing sheet 317 from being damaged. The frame 312 is formed by screwing the screw 319 on the frame body 320 and adding the reinforcing materials 321 and 322. The frame body The portion 32 () is a white resin emitting molded body that effectively reflects light, and is formed in a rectangular frame shape as shown in the figure. This structure can make each part thinner than the overall structure of the resin-II molding frame. Therefore, it is advantageous for the overall light weight of the surface light source device 3. The frame body portion 320 is formed with a flange 32A on the outer side surface. Here, the flange 320A is used to fix the reinforcing members 321 and 322 with screws, and then the liquid crystal display panel can be mounted through the flange 32A. In this way, the frame 312 constitutes a holding member that holds the constituent members of the surface light source device 311, and is also a part of a holding mechanism that holds the surface light source device 3 丨 丨 on the back of the liquid crystal display panel. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. On the side of the frame body section 320 without the reinforcing members 321 and 322, reinforcing tabs 320C are formed, respectively. The protruding sheet 320C protrudes to the inside on the side of the back 314C, which can prevent the reflection sheet 3 丨 3 from being loosened. The reinforcing materials 321 and 322 are formed by bending a metal plate made of a lightweight metal such as stainless steel or aluminum alloy. The reinforcing materials 321 and 322 are arranged along the frame body portion 3 2 0 corresponding to the 3 14 A side of the incident surface and the end of the wedge (hereinafter referred to as the "end"). This reinforces the strength of the frame body portion 320 and prevents the frame body portion 320 from being deformed or broken. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 24 311534

23 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 2 V. Description of the invention (25) Reinforcing member 32 arranged on the end side 1 1 The section is bent to form an L shape. One end side of the L-shaped structure is arranged to contact the outer side surface of the frame body portion 320, and the other end side is formed on the back surface 3 14C side to protrude inside the frame body portion 320. Therefore, the edge of the reinforcing member 321 on the end side of the light guide plate 314 reinforces the strength of the frame body portion 320 to prevent its deformation and damage. In addition, the reflection sheets 3 to 13 are prevented from falling off on the back side. Further, the reinforcing member 321 'disposed on the distal end side may be integrated with the frame body portion 32o by insert molding. This simplifies the assembly process. On the other hand, the reinforcing material 322 disposed on the side of the incident surface 314A has a reflective function in addition to these functions, and constitutes a holding member function to hold and hold the primary light source opposite the incident surface. That is, as shown in the section along line d_d in FIG. 23, the reinforcing member 322 is a bent metal formed into a slightly u-shaped cross-sectional shape and is disposed inside the frame body portion 320. As shown in Fig. 24, inside the both ends of the reinforcing member 322, a rubber bush 323 in the shape of a corner post is held. A fluorescent lamp 324 is disposed inside the reinforcing member 322 via the rubber bush 323. Furthermore, the opening side of the 'reinforcing member 322 is arranged on the incident surface side of the light guide plate 314. Thus, the reinforcing member 322 can reflect the illuminating light emitted from the fluorescent lamp 324, and at the same time constitute a reflector that supplies the illuminating light to the incident surface of the light guide plate 314 'to constitute a holding member that holds the fluorescent lamp 324.

The rubber bushing 323 is made of rubber of an elastic member, and is elastically held inside the reinforcing member 322. In addition, the rubber bushing 323 is equipped with a fluorescent lamp 324 'a pull-out port that can be pulled out and connected to the fluorescent lamp 324 electrode 324A (please read the precautions on the back before filling this page) This paper size applies Chinese national standards ( CNS) A4 specification (210 X 297 public love) 25 311534 1223115 A7 V. Wire of invention description (26). The rubber bush 323 is held inside the reinforcing material 3 2 2 in a state where the fluorescent lamp 3 24 is inserted into the insertion hole and the wire is pulled out from the extraction hole. In this way, the camp light 324 is disposed inside the reinforcing member 322. C Please read the precautions on the back before filling in this page.) In other words, the rubber bushing 323 constitutes a holding member that holds the fluorescent lamp 324 as a reflector of the reinforcement 322, and also cushions the impact of the fluorescent lamp 3 24. Buffer section. It also constitutes an insulating member between the insulating metal reinforcing member 322 and the electrode 324A. Also, the fluorescent lamp 324 is inserted into a rubber bushing with a lead connecting portion together with an electrode 324A by a non-shrinkable hose. That is, in this embodiment, the rubber bush and the non-shrinkable hose together constitute an insulating member. The reinforcing member 322 is formed in a stepped shape at one end side of the exit surface 314B and is bent at a slightly right angle inward. Thereby, the rubber bush 323 is kept from being displaced to the light guide plate 314 side. In this way, the reinforcing member 322 doubles as a holding member that holds the primary light source. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 3 2 2 ′ As indicated by the enlargement of the symbol E, the inward bend is set at the point where the incident light plane 3 14 A penetrates the primary light source side. The bending angle was set to approximately 90 °. . Furthermore, the reinforcing member 322 is closer to the back surface 31 (: side position 'than the first edge where the incident surface 314 and the exit surface 314B meet, and its front side is bent back at an angle greater than 90 °. That is,' located on the exit surface One end of the reinforcing member 322 on the side of 314B, when installed as a surface light source device, is closer to the primary light source than the incident surface 3 丨 4 A, bends back inward and hangs down, and further leaves the front side of the light source sideways Bend back in the direction.

Here, the angle of the hanging piece shown at 322B in the figure and the bent piece shown at 322C in the figure is less than 90 °. In addition, the hanging piece 322B and the bent piece 322C use the Chinese National Standard (CNS) A4 size (210 X 297 mm) for this paper size ----- 26 311534 1223115 A7

The connection position 322D printed by the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is set to be lower than the exit surface 3ub of the light guide plate 314 (on the back 1414C side). That is, an inclined surface 322A is formed on one end side of the reinforcing member 322, and the inclined surface 322A is abutted against the first edge and extends as if across the edge. In other words, the inclined surface 322A extends toward the rear surface 3i4c side 'on the primary light source side with the first edge as the boundary, and extends away from the rear surface 314c and the exit surface 314b on the light guide plate 314 side. The reinforcing member 322 supports the reflecting sheet 313 and the light guide plate 314 by the front end portions of the inclined surface 322A and the rear surface 314C. This prevents the light guide plate 314 and the reflection sheet 313 from sloshing in the up-down direction. The inclined surface 322A has a braking function, which can prevent the light guide plate 314 from moving beyond the connection portion 322D of the hanging piece 322B and the bent piece 322C to the fluorescent lamp 324 side. In this way, the first edge is always shielded, which can prevent abnormal light emission of the illumination light other than the incident surface 314A incident on the light guide plate 314. Referring to FIG. 25, it is assumed that the reinforcing member 322 is bent 90. The time outline is shown as a dotted line. In comparison with this outline, it is known that the reinforcing member 322 of this embodiment is formed on the back 3 14C side with the front side facing inward (refer to angle 0). Here, the reinforcing member 322 is elastic and can support the reflecting sheet in this state 313 and light guide plate 314. In addition, the protective sheet 318 is formed with a black border to form a border 318A. This border 318A is formed at the front end of the exit surface 314B side and spans the incident surface 314A. This makes it possible to prevent light leakage and abnormal light emission more reliably. The advantages of this embodiment are summarized as follows: (1) In the frame body portion 32 formed by the injection molding body, screws gig * Y * -------- ^ -------- -(Please read the precautions on the back before filling out this page) This paper size applies Chinese National Standard (CNS) A4 (210 X 297 mm) 27 311534 1223115 Printed by A7, Consumer Cooperative of Intellectual Property Bureau, Ministry of Economic Affairs --- _____ Five (5) invention description (28) The reinforcing member 321 is fixed, so the frame body portion 320 can be designed as a thin wall, and the frame body portion 320 on the end side of the light guide plate 314 can be prevented from being deformed or broken. (2) On the incident surface 3J4A side, since the rubber bush 323 is used, the fluorescent lamp 324 can be disposed inside the reinforcing member 3 2 2 with the two electrodes 324A connected to the lead wires. The 'reinforcing member 3 2 2 is attached to the frame body 320 by screws 3 19. This makes it possible to easily secure the strength required to prevent the frame body portion 320 from being deformed or broken on the incident surface 314a side. (3) The curved-shaped reinforcing members 321 and 322 can prevent the reflection sheet 313 and the like from falling off to the back surface 314C side. Compared with the mechanism in which the resin is integrally formed to prevent falling off, the wall thickness on the 31C side of the back surface can be thinner, thereby reducing the weight of the entire frame. In addition, on the side of the incident surface 314A, the reinforcing member 322 doubles as a reflector of the primary light source, so the structure of the reflector is simplified, and the overall thickness of the device can be thinner. (4) The reinforcing member 322 is bent into a stepped shape on the exit surface 314B side, and the rubber cover 323 can be hooked thereon to prevent the fluorescent lamp 32 from being displaced toward the light guide plate 314 side. (5) Due to the elasticity of the rubber pad 323, the fluorescent lamp 324 can be alleviated even if it is impacted by an external force, and the fluorescent lamp 324 can be prevented from being damaged. (6) The rubber gasket 323 and the non-shrinkable hose are insulated around the electrodes of the fluorescent lamp 324. It is also safe to use the metal reinforcement 322 as a reflector, and the lighting state of the fluorescent lamp 324 is not disturbed. (7) The 314B side of the exit surface of the reinforcing member 322 forms a line that often has a shading function -------- Order --------- (Please read the precautions on the back before filling this page) The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 28 311534 1223115 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 V. Description of the invention (29) The slanted surface 322A of energy can stably support the first edge Side, it is possible to surely prevent abnormal light emission of the emitting surface 314B. The reinforcing plate 322 serving as a reflector can also prevent the abnormal light emission caused by the turning-in of light from the side of the exit surface 314B by contacting the first edge. Moreover, the light guide plates 3 and 4 and the reflection sheet 313 are held by the reinforcing member 322, so that even if there is an error in the completion precision of the reinforcing member 322, a gap will not occur between the light guide plate 314 and the reflector. Therefore, light leakage from such gaps can be avoided, and uneven brightness can be prevented. (8) When the light guide plate 314 is displaced to the primary light source side due to an impact or the like, the first edge may have a function of pushing up the inclined surface 322A. However, the reinforcing member 322 is elastic and resists pushing the edges, thereby preventing the light guide plate 314 from being displaced, and thus preventing damage to the fluorescent lamp. (9) The reinforcement 322 is larger than 90. Compared with the angle of 90 degrees, it is not easy to deform due to the processing after processing. This is also advantageous for preventing abnormal light emission and light leakage. Among the above advantages, (7) is particularly important. For further understanding, the metal plate is processed to bend 90 °. Using the customary use case as a reflector, it will be briefly explained with reference to FIG. 28. As shown in Fig. 28, the surface light source device 301 includes a light guide plate 302 and a reflection sheet 304. The light guide plate 302 is the same as the light guide plate used in the present invention, and includes an entrance surface 302A, an exit surface 302B, and a back surface 302C. The frame 305 is structured as if the light guide plate 302, various other members, and the primary light source 3 are integrally held, and these members are surrounded by a side plate, and the _back side member prevents these members from falling off to the back side. The scale is applicable to the Zhongguanjia Standard (CNS) A4 specification (X 297 mm) " ---- 29 311534 --- Order --------- line (Please read the precautions on the back before filling in this (Page) 1223115 A7 V. Description of the invention (30) (Please read the precautions on the back before filling in this page) When a part of the frame 305 is made of metal, for example, the frame body part is formed by injection molding of white resin 305 A , The metal plate bending reinforcement 305B is used in combination with the frame body portion 305A. The reinforcing member 305B 'serves as a back-side member in addition to the strength of the reinforcing frame body portion 305A. If so, even if the frame 305 is formed as a thin wall as a whole, there is no fear of deformation or damage. Here, the 'reinforcing member 305B also serves as a reflector for the primary light source. The reflector is configured to surround the fluorescent lamp 306 equipped as a primary light source to prevent reflection of the light L from leaking out. Here, as shown by the enlargement of the arrow A, the inner wall surface of the reinforcing member 305B is accurately adhered to the emission surface 302B, and no light can enter the light guide plate 302 except the incidence surface 302A. By. However, it is actually difficult to maintain these ideals. Because the processing precision of the reinforcing piece 305B is limited, the deformation after manufacture is inevitable. For example, when metal bending is applied, the impact of punching pressure, mold wear, etc., will inevitably lead to differences in product shapes. ’The reflector body printed by the Consumers’ Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is a slender curved processing product that is slightly the same as the length of a fluorescent lamp. It is also easy to twist when assembling a surface light source device. Therefore, in fact, it is an enlarged view of a part such as arrow 8 or <: light leakage and abnormal light emission occur near the first edge, and the quality of the emitted light is reduced. θ In the case of arrow B, although the front edge of the reinforcing member 5B is blocked by the exit surface 302B, the upper and lower edges will be carved away from the inner side wall of the reinforcing member 5B and a gap will appear. The private paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) JU 311534 1223115 A7 — B7 V. Description of the invention (31) In this case, the primary light source enters from the gap along the exit surface 302B and enters Inside the light guide plate 302. This incoming light is partially reflected from the exit surface at 30C on the back surface. This local increase in brightness will be observed. In the case of the arrow c, the reinforcing member 305B appears before the surface_floating. Therefore, if the ^ = gap occurred with the arrow B, there will be light leakage. Since this light is output to the outside without passing through the light guide plate 302, it causes strong uneven brightness. In addition, not specifically shown, when the reflector, bend, etc., the incident surface 302A side of the light guide plate 30 will fall into the reflector, and thus one of the exit surfaces will be exposed inside the reflector. This exposed part will also have light incident, and the brightness near the incident will also increase. The surface light source device according to the sixth embodiment of the present invention has eliminated the above-mentioned problems, and can be known from the description of the sixth embodiment. The sloping surface 322A described above acts as a fulcrum to the first edge. Even if there is some micro-processing difference or deformation of the reflector, the contact relationship between the sloping surface 322 and the first edge can be maintained. And the vibration and shock do not affect this contact relationship. [Seventh Embodiment] The characteristics of the side-light type surface light source device according to this embodiment are as shown in FIG. 26. Except for the configuration of the reinforcing member 332, this embodiment has the same configuration as that of the sixth embodiment, so only the differences are mentioned. The reinforcing member used here is said to be on the side of the exit surface 314B, and it is formed to be bent more than 90 < Thus, the position bent inward, even if the processing of the 311534 reinforcing member is deviated, the superiority of the sixth embodiment is obtained, and the strength of the reinforcing member 332 is also increased. ί Paper standard Lizhongguanjia standard specifications χ 297 public 31 3123115 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 V. Description of the invention (32) [Embodiment 8] Side-type surface light source related to cancer The features of the device are shown in Figure 27. The surface light source device 341 uses a frame 342 of a white resin molded body. The frame 342 doubles as a reflector. The frame 342 has an elliptical shape in cross section, and the fluorescent lamp 324 is held inside. Then, the frame 342 is blocked from the first edge on the side of the exit surface 31, and the prepared inclined surface 342A extends across it. In other words, the inclined surface 342A has a first edge as a boundary on the primary light source side near the back surface 314C, and the light guide plate 314 side extends away from the back surface 314C and the emission surface 314B. The frame 342 inserts the light guide plate 314 and the reflecting sheet 313 into a U-shaped recess, and the light guide plate 314 is pressed toward the fluorescent lamp 324 for manufacturing. To this end, a pressing member (not shown) is used. In this embodiment, the slanted surface 342A maintains a state of stably blocking the first edge. Therefore, it is needless to say that the light shielding effect is achieved as in the sixth embodiment. As a result, as in the sixth embodiment, it is possible to effectively prevent uneven brightness from occurring in the vicinity of the incident surface 314a. [Other Modifications of the Sixth Embodiment to the Eighth Embodiment] The sixth embodiment to the eighth embodiment also do not limit the gist of the present invention. For example, the following deformation is allowed. (1) In the eighth embodiment, the frame doubles as a reflector. This does not limit the invention. For example, another sheet or the like may be provided as the reflector. (2) It can be formed on the second edge (the edge where the back surface and the incident surface meet) as if it is a light-shielding inclined surface provided on the first edge. At this time, the light guide plate can be pushed to the side of the primary light source, and the inclined sides of the first edge and the second edge opposite to each other can be pushed. This paper applies the Chinese National Standard (CNS) A4 g (21G X 297 mm)- ----- 32 311534 --------------------- Order --------- line · (Please read the notes on the back before filling This page) 1223115 B7 V. Description of the invention (33) Pressing 'makes the blocking state more stable. (3) There is no special limitation on the type and number of attached moon attachment members arranged on the exit surface side of the light guide plate. (4) As the material of the light guide plate. Light scattering light guides can also be used. The light-scattering light-guiding body is a well-known resin material having uniform scattering energy inside. The same applies to the first to fifth embodiments. (5) The light guide plate may not have a wedge-shaped cross section. For example, a light guide plate formed on the exit surface and the back surface, or another light guide plate with an appropriate cross-sectional shape can be used. (6) Most of the end faces of the light guide plate can be used as the incident surface. At this time, a primary light source is provided for each incident surface, and the oblique surfaces of the light shielding measures described in the sixth embodiment to the eighth embodiment are adopted for each of them. (7) The lighting object of the surface light source device is not limited to a liquid crystal display panel. The invention can be widely applied to a surface light source device for providing illumination light to various machines. The same applies to the first to fifth embodiments. -------- Order --------- line (please read the notes on the back before filling this page) The paper size printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs applies the Chinese national standard CNS) A4 size (210 X 297 mm) 33 311534

Claims (1)

Cut 115 No. 891 1 1562 Patent Application Application Scope of Amendment 繁 Family name meal change ^ Day, month, day A surface light source device includes: V light plate I has an output surface that outputs light, facing away from the aforementioned output surface. On the back side, the incident surface of the input light from the side and the first edge formed at the junction of the aforementioned exit surface and the aforementioned incident surface;-a human light source, which is arranged opposite to the aforementioned incident surface; and the reflecting member 'is configured to guide the aforementioned -The secondary light source supplies light to the incident surface, wherein the reflective member is provided with a reflective layer and is formed on a metal substrate and an inner surface of the substrate; and the reflective member is formed with the first edge to be engaged with the reflective member Of the section. 2 The surface light source device according to item 1 of the scope of patent application, which includes a frame to accommodate the aforementioned light guide plate, the aforementioned primary light source, and the aforementioned reflective member; the employee welfare committee of the Central Standards Bureau of China has printed A on the aforementioned light guide plate Between the end surface and the frame, a gap is formed to allow the thermal expansion of the light guide plate, and a pushing device is arranged in the gap to push the light guide plate to the section and allow the thermal expansion of the light guide plate. clothes. 3. The surface light wave and device according to item (i) or (ii) of the scope of application for a patent, in which a part of the base material of the aforementioned reflective layer J々 on the aforementioned reflecting member is cut to form the aforementioned segment. The paper size of Caiguan County 1 (revised version) 311534 4. If the scope of the patent application is the first one, the aforementioned light guide plate has the above-mentioned surface light-emitting device at the meeting point, item 2 or item 2, and the second edge The edge is formed in the aforementioned. The emitting surface and the front reflecting sheet are disposed opposite to the back surface, and one end of the reflecting sheet is protruded to the light source side beyond the second edge. 5. The surface light source device according to item 3 of the scope of patent application, wherein the aforementioned light plate has the following: ㈣ formed at the junction of the exit surface and the back surface, the reflection sheet is disposed opposite to the back surface, and the reflection sheet is described One of the end portions protrudes beyond the second edge toward the light source side. 6. The surface light source device according to item 2 of the scope of patent application, wherein the surfaces of the pressing device and the wall frame are colored black or gray. As claimed: The surface light source device of item i or item 2 of the patent patent, in which the corners of the other parts are formed into a slightly arc shape with a radius of curvature of 10 or less. Printed by the Fortune Committee of Staff of the Central Standards Bureau of the Ministry of Economic Affairs 8.:. The surface light source device according to claim 3, wherein the corner part of the aforementioned segment 形成 is formed into a slightly arc shape with a radius of curvature of 10 ° or less. 9. The surface light source device according to item 2 of the patent application, wherein a pressing device housing portion that is fastened to a part of the pressing device is formed in the frame wood. • And, in order to take a photo of a liquid crystal display device, __ clothes are equipped with a liquid crystal display panel 2 (revised version) 311534 this ---- Chong Feng (CNS) --- H3: the surface of the aforementioned liquid crystal display panel Light source device, in which front source = source device is the surface light = item 1 or 2 of the scope of application for a patent = device 'equipped with: a liquid crystal display panel; and a surface light source device configured to follow the panel, wherein the front surface先 源 #Set is a surface light source device in the scope of patent application No. 3 12. A kind of reflective member, for the incident surface provided with the exit surface, the back surface, the end surface and the I 〇 The two-sided ¥ light plate of the incident surface is arranged to surround the light source that supplies light through the aforementioned incident surface, and is characterized in that: a front manifold has money connected to the ends of the exit surface and the back surface, and It comprises a metal substrate and a reflective layer formed on the inner surface side thereof. 1 ^ ^ one of the aforementioned reflective layer and one of the aforementioned substrate is cut to form a section that is fastened to the edge of the month described in J. 13 · —Surface light source device, which includes: · Printed by the Staff Welfare Committee of the Central Standards Bureau of the Ministry of Economic Affairs. The light guide plate has the exit surface of the output light, facing away from the exit surface = the back side, and the incidence of input light from the side Surface, and the first edge where the exit surface meets the incident surface; the primary light source is disposed opposite the incident surface, and the holding member holds the primary light source opposite the incident surface, and is characterized by: Applicable (CNS) A4 specification (21〇χ297297) 3 (revised version) 3 丨 534 ~ The scared scale is provided with a beveled edge and spans the aforementioned first edge. 4. For example, the patent holding member is a surface light source device having a bending force, wherein the above-mentioned 5 is formed by bending a metal plate. "Medium" patent rail surrounds the surface light source device of item 13 or item 14, the source of the i source is a reflector 'to reflect the aforementioned-sub-light distribution light source device': the aforementioned and other constituent members become: body: " The aforementioned light guide plate [7 ·-: a liquid crystal display device is provided with: a liquid crystal display panel and a surface light source device arranged to describe the liquid crystal display panel, and the surface light source device includes: 2 light plates' having: ㉟The exit surface of the outgoing light, the moon φ facing away from the exit surface, the entrance surface of the human light input from the side, and the first edge formed at the junction of the exit surface and the entrance surface; the secondary light source and the entrance surface Relative configuration; a holding member that holds the primary light source opposite to the incident surface, and an inclined surface is provided on the holding member to block the first edge and cross the first edge. 18. The liquid crystal display device according to claim 17, wherein the holding member is formed by bending a metal plate. 19. If the liquid crystal display device of the 17th or 18th in the scope of patent application, wherein the holding member is a reflector to reflect the aforementioned primary light distribution sizing, the standard is applicable-_ house standard (& NS) Α4ϋ⑴X- ______ 4 (Revised) 3 丨 丨 534 1223115 The Staff Welfare Committee of the Central Standards Bureau of the Ministry of Economic Affairs printed the light provided by the H3 source. 20. The liquid crystal display device according to item 2 of the scope of patent application, wherein the holding member is a part of a frame for holding the light guide plate and other components as a whole. 5 (revised) 311534 This paper size applies to China National Standard (CNS) A4 (210 x 297 mm)