TW200426466A - Plane light source and display device using the same - Google Patents

Abstract

The invention provides a thin plane light source device that emits high intensity light without deviation and a high quality display device. The plane light source device consists of light guide board 3 that lets the side incident light emit upwardly, and substrate 11 that is installed opposite to the side plane 3a of the light guide board 3. Light source 10a of the first row and light source 10b of the second row are parallel installed on the substrate 11 along the long side 3c of the side plane 3a. Light source 10a and light source 10b are tilted installed opposite to the long side of the light guide board 3. Light source 10b of the second row is set up among the light source 10a of the first row.

Description

200426466

[Technical field to which the invention belongs] The present invention relates to a planar light source device and the use of the display device. 1 、、、、 negative [Prior art] A liquid crystal display device includes a liquid crystal panel formed of two substrates sandwiching a liquid crystal layer; and a flat light source device provided on the rough surface side of the liquid crystal panel. It is used as a light source for a planar light source device. Traditionally, the light source uses a linear cold-cathode tube. However, considering the length of the life and the advantages of light emission, there are also light-emitting diodes using three colors of R, G, and B (hereinafter LEDs are called I with multiple light sources. There are also light sources with multiple LEDs that emit white light. The light emitted by this LED is incident on the side of the light guide plate and guided to the entire surface. The point light source of the flat light source device is used in the case of large daylight, such as display, etc., must be equipped with a large number of LEDs to increase the surface: the light in the body. Also, the LED must be configured to be uniform from the planar light source However, due to the thinness of the planar light source device and the narrow space of the frame, the configuration space is limited. The & 'will cause a planar light source, and the arrangement of the LED will affect the uniformity of the light on the entire surface, Display, color deviation, brightness deviation and other display deviations. To achieve uniformity of redundancy, a two-sided light source device configured with ud on the light guide surface (for example, patent document " Each side is equipped with LEDs. Moreover, the LEDs in the opposite positions are LEDs of different colors. However, this planar light source device is 200426466 V. Description of the invention (2) The following problems exist. In some cases, due to the fact that the LED dies must be arranged at intervals. Therefore, the problem on ^ ^ ^ results in a gap. Even if a diffusion film is interposed, the light and light areas will show the brightness deviation between day and night. . Like the second part, the dark part will also propagate in the light-emitting board, and the directivity and configuration of the LED will be similar. Even if the light is reflected in the guide, the problem of display deviation will occur. When the size becomes larger, the problem of display deviation will become more significant. ",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, and, the side of the substrate and the light plate are facing each other. The light from the LED is incident from the side of the light guide plate into a planar transmission. However, the S & LED space of the LED is limited due to the requirements for the thinness and narrow frame of the liquid crystal display device. In order to achieve the thinness, the side Light A side-view type LED is mounted on a substrate (for example, Patent Document 2). This liquid crystal display device has a substrate arranged slightly parallel to a light guide plate, and L £ d is arranged on the substrate. The substrate is formed as Wiring pattern for supplying LED current. When side-view type LEDs are placed on the substrate, the thickness of the light source can be reduced. However, in order to limit the space in which the light sources are actually installed, the number of light sources cannot be increased, and the brightness is increased. Difficult. Patent Document 1 JP 2 0 2-1 5 7 9 0 9. Patent Document 2 JP 2 0 3-7 6 2 8 7.

2185-6l88-PF (N2) .ptd

200426466 V. Description of the invention (3) [Summary of the invention] The problem to be solved by the invention: As described above, it is difficult to emit uniform light at a high brightness with the planar light source device and display device used in the conventional LED. The present invention is an invention proposed to solve this problem, and an object thereof is to provide a flat light source device and a display device with uniform display characteristics under high brightness. In this example, the Γν board light guide includes the packaged source light: Av 0¾, which is a flat-handed section, and the solution is based on the use case. The first light of the board light guide is closed by the light source 1J. The example of the entrance side is from Shi Jiangshi, this example is the real plate of the source light. The face is applied with the face M. The light is as described in the introduction. C The front side is facing the long edge. For example, the length of the Guan phase setting number is reset before the first description, and, ..., the column of source light. ~ Example of the implementation of the second embodiment of the implementation, such as the source of the source of light spoon spoon Λ3. Λ3. 歹 歹 Here is the source of light from 0 can be described before and the source of light ο I1 difference before the degree of prejudice In addition to disposing the dismountable source, the light source surface is dark and flat, and the light source is smoother than the extinction source light surface. , Help this group by. The optimizing type is a thin row and a flat, and it is slightly vacant. It is arranged with a row of light sources. ^^ There is a front side of the auxiliary surface, and a frame of narrow source boards installed on the same side. The light and light are placed on the surface before the light source is installed. The light is on the surface and the light is on the surface. ΪΠΊ < 1

2185-6188-PF (N2) .ptd Page 7 200426466 V. Description of the invention (4) A suitable embodiment of the above-mentioned planar light source device is characterized in that the aforementioned light source has a light emitting diode related to the third embodiment of the present invention The planar light source device is characterized in that the light source in the first row or the light source in the second row of the above-mentioned planar light source device is inclined with respect to the side. As a result, dark portions between light sources can be eliminated, and variations in brightness can be prevented. A planar light source device according to a second embodiment of the present invention includes a plurality of light sources having a point-shaped light emitting element; and a light guide plate that guides the light incident from the side to the entire surface and emits the light from above. The plurality of light sources are arranged along a long side of one side of the light guide plate, and each light source is arranged obliquely with respect to the long side. As a result, the area of the dark portion between the light sources can be narrowed, and brightness deviation can be prevented. A suitable embodiment of the above-mentioned planar light source device is a device in which the aforementioned light source is a substantially rectangular grain type light source. The above-mentioned planar light source device is suitable for a display device. [Embodiment] First Embodiment of the Invention An embodiment of the present invention will be described below with reference to the drawings. The following description only shows suitable embodiments of the present invention, and the scope of the present invention is not limited to the following embodiments. In the following description, devices that have been assigned the same symbol actually represent the same content. The configuration of a liquid crystal display device according to the first embodiment of the present invention will be described with reference to Figs. 1 and 2. Fig. 1 shows a liquid crystal display device.

2185-6188-PF (N2) .ptd Page 8 200426466 V. Description of the invention (5) An exploded perspective view of the structure. Fig. 2 shows a cross-section of the structure of the liquid crystal display device. Fig. 2 is a liquid crystal display device, 2 is a reflection device, 3 is a light guide plate, 3a is a side surface of the light guide plate 3, 3b is an upper surface of the light guide plate 3, and 3c is a side surface 3a. Are long sides, 4 is an optical film, 5 is a liquid crystal panel, 6 is a reflective film, 10 is a light source, and 11 is a substrate. As shown in FIG. 1, a reflection device 2 is installed on one side 3 a of the light guide plate 3. The reflection device 2 includes a plurality of directions along the long side 3 c of the light guide plate side 3 a (direction X). Point-shaped light-emitting diode (LE))) light source (no picture). The upper surface 3b of the light guide plate 3 is provided with an optical film 4 and a liquid crystal panel. The upper surface 3b is a light emitting surface, and light incident from the side toward the light guide plate 3 is emitted from the upper surface. A reflective film is provided below the surface on which the optical film is provided and on the reverse side. These devices are fixed by a frame (not shown) to constitute a liquid crystal display device. ^ The side surface 3a and the vertical cross section of the light guide plate provided with the reflection device 2 are as shown in FIG. The substrate 11 is provided on the side surface 3a of the light guide plate 3 so as to face each other. Light sources 10 in two rows are mounted on the opposing surfaces of the substrate 11 and the light guide plate 3. The light source 10 is a crystal-type light source including a light emitting diode. The light source 10 emits directional light in the direction of the light guide plate 3. The reflector 2 is provided to surround the substrate 11 and the light source 10 in order to improve the light use efficiency. The reflecting device 2 is made of metal, white resin, or the like, and reflects light in the direction of the light guide plate 3. An optical film 4 made of a diffusion film, a protective film, a lens film, a refractive film, or the like is provided on the light-emitting surface side of the light guide plate 3. On the light-emitting surface 3 and the opposite side of the light guide plate 3, a reflective film made of metal or white resin or the like is provided. These components constitute a planar light source device. The development of the planar light source device

2185-6188-PF (N2) .ptd 200426466 V. Description of the invention (6) A liquid crystal panel 5 is provided on the glossy surface. These members are fixed by a frame (not shown) to constitute the liquid crystal display device 1. The light emitted from the light source 10 is incident on the side surface 3a of the light guide plate 3 directly or via the reflection of the reflection device 2. The light guide plate 3 is made of acrylic or polycarbonate. The light incident from the side surface 3a of the light guide plate 3 is repeatedly totally reflected in the light guide plate, and is guided to the entire surface. The light propagating through the light guide plate 3 is emitted from the upper surface 3b (light emitting surface) toward the optical film. The light emitted from the upper side of the light guide plate 3 enters the liquid crystal panel 5 through the optical film 4. The light emitted from the back side of the light guide plate 3 is reflected by the reflective film 6 and enters the light guide plate 3 again. The liquid crystal panel 5 includes a color filter substrate (CF substrate) and a thin-film electrical array substrate (TFT array substrate), and a liquid Z layer is sandwiched between the substrates. The CF substrate includes a coloring layer, a light-shielding layer (BM), and the like of r, g, and b. The array substrate includes a switching element and a pixel electrode. A driving voltage is applied to the pixel electrode through the on and off of the switching element. Since the driving voltage liquid crystal layer is aligned, a desired image is displayed. The configuration of the substrate n on which the light source 10 is provided will be described with reference to FIG. 3. Fig. 3 is an illustration of the substrate 11 as viewed from the V-light plate side. The light source 10 is fixed to one surface of the base plate 11. In order to face the light emitting surface of the light source 10 and the side surface 3 a of the light guide plate 3, an end portion of the substrate 11 is fixed to the reflection device 2. Therefore, the substrate J i and the long-side direction (X direction) correspond to the long-side 3 c direction of the side 3 a of the light guide plate — 1 The knuckle direction (Y direction) of the substrate 11 corresponds to the side 3 a of the light guide plate. A line pattern (not shown) is formed on the surface of the substrate 11 to supply power to the light source 10. In addition, a wiring pattern is also formed on the inside, and is connected to the light source 10 through the through-holes of the teeth. Setting wiring patterns on both sides can reduce the distribution. Page 10 2185-6l88-PF (N2) .ptd 200426466 V. Description of the invention (7) ΐ :: Light: ii m Power is supplied to the light source. In order to efficiently reflect the light, the light from the source 10 is used to form the substrate "from a white resin." In addition,: L FPC may be used. In addition, a metal plate (not shown) may be provided to fix the reflection device 2 and the substrate 11 for the heat from the light source 10 and the moon heat. The metal plate is preferably made of aluminum or the like having a high thermal conductivity. Furthermore, the shaw board is disposed on the inner side of the substrate ，, and the shaw board is sandwiched between the board n and the reflection device 2 and fixed to the board i i. In this embodiment, n light sources 10 are arranged in a row parallel to the long side of the substrate 11. The light source 10 arranged in the upper row is referred to as the light source i0a in the first row. Under the light source 10a, nine light sources 10b are arranged in parallel with the light source 10a. The light source 10 arranged in the following is referred to as the light source 10b in the second column. The light source 10a in the first column and the light source 10b in the second column are arranged along the long side direction (X direction) of the substrate 11, and are arranged slightly parallel to the long side. In addition, the light source IOa in the i-th column and the light source 10b in the second column are alternately arranged. Therefore, the light source 10b is disposed at an intermediate position between two adjacent light sources 10a, and conversely, the light source 10 & is also disposed at an intermediate position between two adjacent light sources 10b. Therefore, a light-emitting area of the light source 10b may be provided between the light-emitting area of the light source 10a in the long side direction (X direction) of the substrate. The light emitting area of the light source 10 can be provided in almost the entire area of the long side direction of the side 3a, and light can be emitted in the long side direction except for the end portion of the substrate 11. As a result, the dark portion between the light sources is incident on the entire light in the direction of the long side 3c of the side surface 3a of the light guide plate, so the brightness of the light incident on the side surface 3a of the light guide plate 3 can be more uniform. Moreover, by arranging the light sources 10 in two rows in the short-side direction (γ direction) of the substrate 丨 丨, the number of light sources 10 can be increased without increasing the frame edge size.

2185-6188-PF (N2) .ptd p. 11 200426466

The higher the current of the LED of the light source! Each LED emits more heat when the current becomes higher. LED will change with quantity, spectrum and chroma. Therefore, to reduce this, it is better to use low current. In the present invention, the current of the light sources that can increase the number of light sources becomes low. Thereby, the amount of light emitted from the plane can be increased, and the change in display characteristics can be suppressed. Generally, the light source 10 is arranged on the opposite side of the light guide plate. The use environment causes the temperature of the light guide plate to be opposite to the ambient temperature. Changes in the ambient temperature may cause display of brightness deviation, color deviation, etc. of the light emitting characteristics of the LED. deviation. However, as a rule, all light sources are arranged on one side of the light guide plate, which can be used as electricity, but the electricity causes actinicity to flow through all the conventional display devices. It is produced like this, and the general flow of this implementation also uses more variables such as temperature, so that the light source is installed in the image, and the change causes the image, so that the LED use environment is about the same. When an LED is disposed at an opposite position on the facing surface of the light guide plate, the light is transmitted through the light guide plate from the opposite LED to make the light incident. The absorption of this light may cause the temperature of the LED to rise. By arranging all the light sources on the same side as in this embodiment, it is possible to reduce the change in display characteristics due to temperature rise, and to improve the display quality. This light source 10 will be described using FIG. 4. Fig. 4 is an enlarged perspective view showing the configuration of the substrate 11 without the light source 10. 12 is a light emitting element, and 13 is a light emitting field. A light emitting element formed by a dot-shaped light emitting diode is provided at the center of the light emitting surface of the light source. This light-emitting element 2 uses a white LED ′ to emit white light with directivity from the light-emitting surface. The light source is a crystal-shaped light source having a size of a light emitting surface of 2 mm in length, 3 mm in width, and 2 mm in height. A light emitting area 13 having a length of 1.3 mm x a width of 2 mm is formed on this light emitting surface, and light is emitted from the light emitting area 1 3. The light emitting surface of the light source is rectangular, forming a slightly rectangular shape in the center

200426466 V. Description of invention (9) --- The field of luminescence. The light-emitting surface and the center of the light-emitting area 13 are approximately the same. The light emitting surface and the opposite surface of the light source 10 are mounted on a substrate. The light sources 10 a in the first column and the light sources 10 b in the second column are staggered. An electrode is formed on the light-emitting surface and the opposite surface of the light source 10. Through the wiring provided on the substrate, a pattern current is supplied to the light-emitting element through this electrode. Light is emitted from the light-emitting area 13 of the light-emitting surface of the light source with a directivity, and is incident on the side surface 3 a of the light guide plate 3. The grain-shaped light source 1 must be mounted on a substrate for actual assembly accuracy. Install 1 mm from the adjacent light source. Therefore, a gap of about 1 minute is generated between the light source 〇a and the adjacent light source 10a. Under this gap, the light emission area of the light source 1 Ob in the second column is emitted from the plurality of light sources 10 in the longitudinal direction of the substrate 11 without any gap. As a result, the dark portions between the light sources in the long-side direction (X direction) of the light guide plate side surface 3a can be eliminated, and light can be made incident on almost the entire long-side direction of the side surface 3a. Since the brightness on the display daylight surface reflects the brightness of light incident on the side surface of the light guide plate 3, controlling the dark portion between the light sources can eliminate the brightness deviation on the display daylight surface. Like this, light source 1 in column 1 and light source in column 2! Staggering the configuration can eliminate display deviations. By arranging the light sources 10 in two rows in a staggered manner, a gap between the light sources can be ensured. Therefore, more light sources 10 can be arranged around the side of the light guide plate without increasing the frame edge size, and the brightness of the flat light source device can be improved. Two light sources 10a listed in Fig. 3 are provided more than the following light sources 10b. Although the length of the above column is increased ', the number of the following light sources may be increased to make the following length longer. Of course ’is the same number as the settings below

2185-6l88-PF (N2) .ptd Page 13 200426466 V. Description of the invention (10) ~-~-= source, the same length can also be used. In addition, the size of each light source 10 may be different, and arrangements may be made such that the gaps between the light sources are different. In terms of practical restrictions, even if the light sources on the substrate cannot be connected to each other, 'if the light source 丨 0b is arranged under the gap between the light sources 丨 0a', because the long side direction of the light guide plate side can be eliminated Darkness between light sources can eliminate brightness deviation. In addition, even if adjacent light sources 丨 0 can be placed on the substrate in a contact manner, when a light emitting area cannot be fully set on the light emitting surface of the die, a gap may occur in the light emitting area 13 of the adjacent light source 10, and a dark portion may occur. Even in the case where the light source in the second column is provided below the gap in the light emitting area in this case, the dark portion between the light sources can be eliminated, and the brightness deviation can be eliminated. In such a case where a light source that generates a gap in the light-emitting area and a dark portion is used, the light source arrangement according to this embodiment can also be used to eliminate the dark portion, and the brightness deviation can be eliminated. In addition, the entire light-emitting surface of the light source 10 is a case where there is no gap in the light-emitting area, and also an emission angle distribution or brightness distribution of light generated in a plane due to the light-emitting characteristics of the light-emitting element 12. Generally, the directivity of the light emitted from LEd is 0 degrees (vertical direction). The light intensity is the highest. Therefore, when the light emitting element 12 is disposed at the center of the light emitting surface of the light source 10, the amount of light at the end of the light emitting surface. Becomes the lowest. Even if this is the case, by setting the light source 10b under the gap between the light sources 10a, the light emitted from the light source is uniform, so that more uniform light is incident on the light incident surface of the light guide plate. Deviation in brightness of the light emitting surface of the device. This can suppress the display deviation of the liquid crystal display device and improve the display quality. In addition, even if the light source in the second row is arranged between the light sources in the first row, the

2185-6188-PF (N2) .ptd Page 14 200426466 V. Description of the invention (π) Because of the size of the light source 10, the light emitting element 12, the distance between the light source 10, the light source J, and the light source 9 The situation where the dark parts are completely eliminated. Even if it is like this, shifting the light source center of the first column and the second light source 10b away from the long-side direction of the surface 3a can reduce the area of the dark part, which can be inferior. In addition, due to the retention of light from the LED, the degree of squareness and the diffusive emission, the difference between the light guide plate 3 and the light source 10 is divided into _ _. Τ Also, the knife can open the light _ Ground incident on the side 3a but the size of the frame edge becomes larger. As shown in this embodiment, the light sources 1 0 a in the column and the light sources 1 0 b in the second column are arranged staggered from each other, so that the light guide plate 3 and the light source 10 can be avoided. The distance is increased to make the light incident on the side surface 3a uniform. Therefore, the distance between the light guide plate 3 and the light source 10 can be shortened, and the distance can be reduced.

Small frame edge size. By transmitting the light source in the second row between the light sources i 0 a in the first row as described above, X can increase the light emitting area in the long side direction. In this case, it is preferable to dispose the light-emitting areas 13 of the light source 10b in all the dark portions between the light-emitting areas of the light source 10a, so that the dark portions are eliminated. As a result, it is possible to eliminate brightness deviations corresponding to the dark portions between the light sources. However, even if the dark part cannot be completely eliminated in the actual assembly or the size of the crystal grains, the light source 10a and the light source 10b are staggered and partially transmitted between the light sources in the first row of the light source and the second is arranged. The light source 10 b of the row can shorten the dark portion. This can improve the brightness deviation. In the case where a white LED light source is used in the above-mentioned configuration, for example, the number of light sources in the first column and the second column of the 12-inch liquid crystal display is about 110 to 120. It is possible to arrange most LED light sources like this. Second Embodiment of the Invention The arrangement of a light source related to the present invention will be described using FIG. 5

2185-6188-PF (N2) .ptd Page 15 200426466 V. Description of Invention (12). Since the configurations of the liquid crystal display device and the planar light source device of this embodiment are the same as those shown in the first embodiment, the description is omitted. Fig. 5 is a diagram showing the arrangement of light sources, which is the light viewed from the side of the light guide plate ^,

Illustration. In this embodiment, the same light source as in the first embodiment is used, and this light source 10 is arranged obliquely with respect to the direction of the long side 3c of the light guide plate side surface 3a. That is, one side of the light emitting surface of the light source 10 and the direction of the long-side center are arranged in an inclined state. Like this, because one side and the long side of the light emitting surface are not flat Y or right angle), the light emitting area 13 can be inclined relative to the long side 3c: when the light emitting area 13 is slightly rectangular, the diagonal is projected A configuration in which a side on the long side is set at a right angle (or parallel): a longer light-emitting area is obtained. That is to say, through the oblique light source i ,. Two can: reduce or eliminate dark parts between officials. From this, the same effect as that of the first embodiment can be obtained. Therefore, it is possible to prevent the light emitted from the light-emitting surface of the light guide plate 3 from causing the display quality of the bright display device. J Λ Juice II, f tilt the light source 10, if one side is not right angle (or Zao Guang, ΛΑ 1 and side 3a to improve the brightness deviation. Also, the life can make the light emitting area longer. In the case of a short shape, it is better to use the direction of the short axis and the short axis. # 井 ^ or or 疋 毛 光面 has the long axis as small as possible: ί = 2 axis direction and long side 3. Long. A little more than ten is better. Therefore, the third embodiment of the invention in which the light emitting field is changed

2185-6188-PF (N2) .ptd Page 16 200426466 V. Description of the Invention (13) The light source configuration related to this embodiment will be described using FIG. 6. Since the configurations of the liquid crystal display device and the planar light source device of this embodiment are the same as those shown in the first embodiment, the description is omitted. Fig. 6 is a diagram showing the arrangement of the light sources, and is a view of the light sources viewed from the side of the light guide plate. 'In this embodiment, the same light source 1 as in the first embodiment is used. The source 10 is tilted with respect to the long side 3 c of the side 3 a of the light guide plate. The light source 1 Oa of the first row is installed with a gap. On the substrate. Configure here. Arrange the light source 1 in column 2 b. That is, the light source 10 is configured using a combination of the embodiments below the first implementation gap. With this arrangement, the same effects as those of the second embodiment and the second embodiment can be obtained. Therefore, relative to the long side direction of the first surface 3a, the dark portion between the light sources or the light guide plate side area can be eliminated, and light can be incident on the long side direction and the dark portion of the side of the light guide plate 3 on the display screen. The brightness is reflected on the entire side of the light guide plate 3. The degree of brightness can be removed based on the dark part between the light sources. In addition, the gap between the light sources can be ensured, which can save energy; the light source with more brightness on the outside. Therefore, without increasing the size of the frame edge, more light sources can be arranged on the side, and the brightness of the fourth embodiment of the invention that the plane light source is mounted on the light guide plate can be improved. Fig. 7 is an exploded perspective view showing the structure of a liquid crystal display device, and is a eight-point view showing a planar light source device using the liquid crystal display device. Figure 8. Fig. 9 is a sectional view showing a plane knife and an exploded three-dimensional structure used in a liquid crystal display device. 1 is a liquid crystal display device, 2 is a reflection device, a panel of a chirp device, 3a is a side surface of the light guide plate 3, 3b is an upper surface of the light guide plate 3, 3 is a light guide 3 c is a side surface

2185-6188-PF (N2) .Ptd Page 17

200426466

3a is the long side, 3d is the short side of the side 3a, 4 is an optical film plate, 6 is a reflective film, and 11 is a substrate.丨 〇a is the light source of the 丨 ^ 2nd column. Collecting this light source becomes the light source 10: b 疋 3a The direction parallel to the long side is X square (horizontal direction), and the side direction is the Y direction, and The direction in which the short sides 3d are parallel is 2 directions). v 丄 r force

As shown in Figure 7 on the light guide plate 3! Side 仏 installs the reflection device 2. The reflecting device 2 is a frame formed of metal, white resin, or the like, and reflects light in the direction of the light guide plate 3. A plurality of point light sources (not shown) having a point-shaped light emitting diode (LED) are arranged in the reflecting device 2 along the direction (X direction) of the long side 3c of the light guide plate side surface 3a. An optical film 4 composed of a diffusion film, a protective film, a lens film, a refractive film, and the like is provided on the upper surface side of the light guide plate 3. The upper surface 3b is a light emitting surface, and light from the side surface 3 & incident on the light guide plate 3 is emitted from the upper surface 3b. A reflective film 6 is provided on the side opposite to the side where the optical film 4 is provided. Through these devices, the entire surface of the planar light source device can emit light efficiently. These devices are fixed via a frame (not shown) to constitute the liquid crystal display device 1.

The light emitted from the light source enclosed in the reflection device 2 enters the side surface 3a of the light guide plate 3 directly or through the reflection of the reflection device 2. The light guide plate 3 is made of acrylic or polycarbonate. The light incident from the side surface 3a of the light guide plate 3 is totally reflected in the light guide plate, and is then guided to the entire surface. The light propagating through the light guide plate 3 is emitted from the upper surface 3b (light emitting surface) in the direction of the optical film. The light emitted from the upper side of the light guide plate 3 passes through the optical film 4 and enters the liquid crystal panel 5. The light emitted from the back side of the light guide plate 3 is reflected by the film

2185-6188-PF (N2) .ptd Page 18 200426466 V. Description of the invention (15) 6 Reflected into the light guide plate 3 again. The liquid crystal panel 5 includes a color filter substrate (CF substrate) and a thin film transistor array substrate (TFT array substrate). A liquid crystal layer is sealed between the two substrates. The CF substrate includes a coloring layer, a light-shielding layer (BM), and the like of R, G, and B. A driving voltage is applied to the pixel electrode by turning on and off the switching element. Due to this driving voltage, the liquid crystal layer is aligned and a desired image is displayed. Next, the LED light source enclosed in the reflection device 2 will be described with reference to Figs. 8 and 9. The substrate 11 is provided perpendicular to the side surface 3 a of the light guide plate 3 as shown in the figure. A row of light sources 10 are provided above and below the substrate 11, respectively. The light source 10 provided on the upper side is referred to as the light source 10a in the first column, and the light source 10 provided on the lower side is referred to as the light source 2 in the second column. That is, the light source 10a in the first column is the light source in the above column, and the light source 10b in the second column is the following light source. The light source 10a in the first column and the light source 10b in the second column are each arranged along the long side 3c of the side surface 3a of the light guide plate, and are arranged parallel to the long side 3c. The light source 10 is a dot-shaped semiconductor light emitting element and is a crystal type light source including a light emitting diode. A surface slightly perpendicular to the surface to be actually assembled is a light emitting surface, and light emitted in a direction perpendicular to the surface is a side view type crystal grain. The light source 丨 〇 emits directional light from the Y-direction facing the light guide plate side 3 a, and this light enters the light guide plate side 3 a. In order to improve the use efficiency of light, a reflecting device 2 is provided so as to surround the substrate 丨 丨 and the light source 丨 〇. ^ The structure of the light source 10 and the substrate 11 on which the light source 10 is actually mounted is described with reference to FIG. 10. Figure 丨 〇 is a perspective view of the substrate i 丨 where the light source 丨 is provided. As shown in FIG. 10, the substrate 丨 i light source 丨 〇a is installed in a row here. The light source 10a is a slightly rectangular shape with a width of about 1mm, a width of 8mm, and a depth of about 1.2mm.

2185-6188-PF (N2) .ptd Page 19 200426466 V. Description of the invention (16). The light guide plate side surface 3a is mounted on the substrate 11 such that the surface facing the light guide plate 3a is a light emitting surface. The light-emitting area 13 of the light-emitting surface is approximately 2.2 mm wide and 0.7 mm high, and has a circular shape as shown in FIG. From this light emitting area 13, light with a directivity is emitted in the direction of the light guide plate side 3a. Since the light source 10 is arranged in two rows, the light source 10 is arranged inside and outside the substrate. Therefore, the number of light sources can be increased without increasing the frame edge area, and the brightness of the plane light source can be increased. When two light sources 10 are arranged in the Y direction, the light from the light source leaving the light guide plate 3 will be absorbed by the light source 10 near the light guide plate 3, resulting in low light utilization efficiency. By arranging two rows of light sources above and below like this embodiment, the light emitted from the LED can be efficiently used, and the purpose of narrowing the frame can be achieved. The substrate 11 is a printed wiring substrate formed by a wiring pattern (not shown) for supplying LED current. Wiring patterns are formed on the upper and lower surfaces of the substrate 11 to supply LED current. A light source 10 was placed on the substrate 11 using a chip-mounter, and wiring and soldering on the substrate were fixed. The actual assembly limit of this mounter must be installed at a distance of 1 mm from the adjacent light source. The substrate 11 is a substrate formed of glass epoxy resin or a FCB (Flexible Printed Circuit) 'thickness may be less than 1 mm. Therefore, the thickness of the light source portion can be controlled to be 3 mm or less as a whole, and the thickness of the planar light source device can be reduced. When a side-view type LED chip is used ', the substrate 11 may be arranged perpendicular to the side surface 3a. In the case where the substrate 11 and the side surface 3 a are arranged in parallel, and the size of the light source 10 is not placed on the wiring pattern of the substrate, the light source portion will become thicker, and it will be difficult to reduce the thickness of the display device. In the present invention, since the side-view type light source 10 is used, the planar light source can be reduced in thickness. Also, for the light source

2185-6188-PF (N2) .ptd Page 20 200426466 V. Description of the invention (17) 1 0 The upper and lower a and 2 rows pass through the respective arrangement inside and outside the substrate 1 1 and can be configured with more light sources 1 0, High brightness can be achieved. The structure in which the substrate 11 provided with the light source 10 is fixed to the reflection device 2 is shown in Fig. 11. FIG. 11 is a front view of a substrate 11 including a light source. The light sources i 0a listed on the upper surface of the substrate 11 and the light beams Qb on the lower surface are spaced at equal intervals. In the X direction: The above-mentioned & source 108 and the following light source 10b are installed at the same position. That is, the A source 10 & and the light source i 0b are arranged up and down in the X direction, and the positions are $ m ^ Ώ ^,, and J). The fixtures 14 and 4 are attached to the two sides A of the lower surface of the reflection device 2 through the adhesive, 0. Two fixtures 4 and 4 are spaced slightly shorter than the length of the substrate 11 ^, ^ ^ „λλ ^ ^, ㈣ are also arranged. Λ rn ^ a 1 y | yi is set inside the fixture 14 rn It can be clamped from the outside of the substrate 11. The stone fixture rubber U, A ^ 1 1 ^ λ 7 is used as the fixing tool 14. The substrate 14 is mounted with a large gap when the substrate 11 is installed. 11 is inserted into the recessed portion. The substrate 11 is clamped and held from both sides by the elastic force of m ^ 1 1 ^ on the fixing fixture 14. Also, the 々T + fixing fixture 14 is painted in white to reflect the light source 1 Light from 0 to enhance the apricot

Ik · M — π g u & utilization efficiency. The method for fixing the substrate 11 to the reflection device 2 in this way is not limited to the method described above. It can also be added by other methods 丨 丄 — * k · «彳 Never, QF., t ^ Λ 固 疋. For example, the two holes of the substrate 11 are opened, and the openings tg I g 苴 k 彳 彳 1 π ”are used to fix the substrate 11 with screws. Also, in the X direction, Although the above-mentioned 氺, width η ^ ^ π ^, before the arrival, the original 10a and the following light source 1 Ob are set at the same location, but as shown in Figure 9] Figure 1 ^ ^ 1ΠΚ ^ ^ Brother 1 2 The light source 1 Oa listed above and the following light source 1 0 b are staggered from each other. The A 1 source ... is placed in the following: two: it is also possible: the light emitting field in the place is arranged in the original :; In this case, the light source 10a above the household weight is in the light emitting field of the light source 1 Ob of the column.

Page 21 200426466

5. Description of the invention (18). Similarly, the light-emitting area 13 of the light source 1 Ob below is arranged in the light-emitting area 13 of the light source 10 a not listed above. The direction of the long side of the side of the light guide plate 3 a can eliminate the area where the dark part between the light sources does not emit light. Thereby, uniform light emission can be obtained in the direction of the long side 3 c of the side surface 3 a of the light guide plate. Since the incident light of the light guide plate 3 is uniform, the light emitted from the upper surface 3b is uniform, which can reduce the brightness deviation of the planar light source device and the liquid crystal display device. 5th Embodiment of the Invention Brother The planar light source device used in the liquid crystal display device of this embodiment will be described with reference to the drawings. The basic structure of the liquid crystal display device related to this embodiment is the same as that of the above-mentioned embodiment, and its description is omitted. Fig. 13 is an exploded perspective view of a planar light source device used in a liquid crystal display device. Fig. 14 is a sectional view showing the structure of a flat light source device used in a liquid crystal display device. Fig. 0 The flat light source device according to this embodiment includes two substrates, a and 1 lb. The substrate 11a is mounted on the upper part of the reflection device 2. Below the substrate 11a, the light sources 10a are arranged in a row along the long side 3c. The substrate 1 lb is mounted on the lower portion of the reflection device 2, and the light sources 10 b are arranged on the upper surface of the substrate lib along the long side 3 c. The light source 10a, which is placed on the substrate 11a, is called the light source 10a listed above, and the light source 10b, which is mounted on the substrate Ub, is called the following light source 10b. The light source ^ 〇a and the light source 10b are arranged vertically in the reflecting device. In this embodiment, the light source 10 is provided only on one surface of the substrate 11. Therefore, the entire surface and the opposite surface of the light 2 10 can be in contact with the substrate 11 and the reflection: 2. As a result, the contact area becomes large, and the light source 10 can be improved, and the efficiency can be improved.

2185-6188-PF (N2) .ptd 200426466 V. Description of the invention (19) The plate 11 is pressed toward the reflection t 2 ′ so that the two are in close contact. Since the substrate 11 & 11b is the same substrate, the same light source is actually assembled here. The light source is actually mounted at the same position of the substrate 11a and the substrate 11b, so that the light source is invertedly mounted on the upper and lower sides of the reflection device 2. Therefore, the light sources 10a listed in the X direction and the following light sources 10b are arranged at the same positions as in Example 4.

The light source 10 is the same as in the fourth embodiment, which is a side-view type LED die light source that emits light from the side. The light from the light source 10 is directionally emitted in the γ direction, and is incident on the side 3a of the light guide plate. Setting the light source 10 through two columns to increase the number of light sources can increase the brightness of the planar light source device. In addition, since the light source 10 is provided on only one surface of the substrate, the actual assembly process can be simplified. In addition, since the configuration of the substrate 11a and the substrate lib and the arrangement of the light sources 10 are the same process, the light sources are actually assembled on the same substrate at the same stage. The actual assembly process of the components of the two substrates 11 and the light source can be unified, and the planar light source device and the liquid crystal display device can be manufactured without increasing the types of components. Thereby, productivity can be improved. ^ In general, the LED will change its luminescence spectrum and chrominance according to the ambient temperature. In addition, when the ambient temperature becomes high, the amount of light emission g tends to be small. Therefore, if it is desired to maintain the uniformity of the planar light source device and maintain a predetermined chromaticity, it is best to set the ambient temperature ^

Low temperature setting. As shown in FIG. 15, it is possible to reflect the mounting season on the substrate entrance: 2 m heat radiation plate 15 ′ and fixed to the substrate u. In this embodiment, since the light source 10 is actually assembled on only one side of the substrate 11, the entire arrangement of the side surfaces and the heat sink 15: eye contact. Therefore, the heat of the ED can be effectively dispersed to the reflection device 2 side

2185-6188-PF (N2) .ptd page 23 200426466 V. Description of the invention (20) Heat. The heat radiating plate 15 is made of a material having a high thermal conductivity. For example, a metal plate is used. End holes of the heat sink 15 and the substrate 11 are fixed to the reflection device 2 with screws or the like. The heat dissipation plate 15 is provided to improve the cooling efficiency of the LED die and reduce the temperature rise of the LED die. It is also possible to press the substrate 丨 丨 onto the heat radiating plate 15 to improve the cooling efficiency. For one LEE), a larger current can flow. As a result, the brightness and display quality of the liquid crystal display device and the flat light source device can be improved. In addition, as shown in FIG. 15, the light source 10 a of the above-mentioned row may be arranged between the light sources 10 b of the following row. This makes it possible to further increase the brightness and thickness of the planar light source device. In terms of the actual assembly restrictions of the placement machine, a certain gap should be separated from the adjacent light sources to actually assemble the light sources. Therefore, a gap is generated between the light sources, and when a row of light sources 10 is arranged, the light source density on the substrate cannot be increased. Because the wiring of the substrate and the soldering of the light source must have space, the gap on the actual assembly limit must be greater than the actual assembly accuracy of the placement machine. Therefore, compared with the case where a column-shaped light source is mounted on one side of the substrate (for example, the structure not shown in FIG. 11), the gap between the light sources is as shown in FIG. 5 and the substrate ia and the substrate lib. The respective columns are actually assembled with light sources, so that the substrates of the two substrates are oppositely mounted on the reflecting device 2. This can shorten the gap between the light sources and improve the assembly density. $ Specifically, in terms of the actual assembly restrictions of the placement machine, a 1mm gap between the light sources must be actually assembled on one side of the substrate (such as the structure shown in the figure), which will cause 1mm between the light sources. The above gap. On the other hand, the structure shown in FIG. 15 uses a chip mounter to mount the substrate during actual assembly.

200426466 V. Description of the invention (21) --- The gap between the light sources on 1 1 is 4 mm. The substrate 1 1 a and the substrate 11 are actually assembled with the light source 10 a and the light source 10 13 respectively. The substrate 11a and the substrate 11b are mounted on the reflecting device 2 by facing the surface provided with the light source 10. The light source 10 having a width of 2 · 8mm is arranged at a gap of 4mm. The light source is configured as shown in FIG. 15a and the light source 1 The gap of 〇b becomes 0.6 mm. Inserting the light source 10b between the substrate Ua and the substrate in such a manner as described above can increase the actual assembly density of the light source 10 in the X direction without increasing the thickness of the planar light source device. As a result, the brightness of the thin flat light source device and the liquid crystal display device can be improved. In addition, the gap between the light sources is wider than the actual assembly accuracy of the mounter.

The area of the dark portion between the light sources is narrowed, and uniform light is incident in the X direction with respect to the side surface 3a of the light guide plate. As a result, it is possible to reduce the brightness deviation of the light emitting surfaces of the flat light source device and the liquid crystal display device, and improve the display quality. Of course, if the light source 10b is arranged between the light sources 10a in the X direction, the occurrence of display deviation can be reduced even if the light source 10b is not inserted between the light sources 10a. In addition, if the light source 10a is inserted between the light sources 10b and the positions of the light source 10a and the light source 10b in the Z direction are overlapped, the interval between the substrate Ua and the substrate nb2Z can be shortened, and a planar light source device can be achieved. And thinning of the liquid crystal display device. Sixth Embodiment of the Invention The following description will discuss the use of the liquid crystal display device of this embodiment with reference to the drawings. The basic structure of the liquid crystal display device according to this embodiment is the same as that of the fourth embodiment, and its description is omitted. 16 and 17 are diagrams showing the configuration of the substrate η on which the light source 10 is actually mounted. A light source 10a and light are actually mounted on one surface of the substrate 11 in this embodiment.

2185-6188-PF (N2) .ptd page 25 200426466 V. Description of the invention (22) Source 1 Ob. The light source 10a is arranged in one row along one side of the substrate, and the light source 10b is arranged in one row along the opposite side of the side where the light source 10a is arranged. The light source ^ is a side-view type LED die light source that emits light from the side, and uses the same light source as in the fourth embodiment. The light sources 10 a and 10 b each emit light to the outside of the substrate 11 with two light surfaces on the end sides of the substrate U. In order to be able to bend the substrate 丨 丨 use 4 FPC. As shown in FIG. 17, the lens is bent near the center, and 10 turns into the upper and lower two rows, and emits light in the same direction. In such a state that Fpc 'is used as a helper or a fold, the area for forming a wiring pattern can be enlarged by using the substrate 11'. As a result, the wiring resistance can be reduced, LED power can be stably supplied, and the purpose of improving display quality can be achieved. & The substrate 11 is fixed in the reflection device 2 in the same manner as in the above embodiment. As a result, as shown in FIGS. 18 and 19, the light source 10 is actually assembled only on the first surface, "improving productivity. Moreover, a light source metal plate is provided on the surface, and a metal thin plate for heat dissipation is provided on the surface." : The source device and the liquid crystal display device on the opposite side and the opposite side will not cause planar light. The other embodiments "factory, can improve brightness. The present invention is not limited to the above. For example, in the above embodiment; ΐ :::, various changes and the like can be added as examples, and the source can be added: number, ... Although the configuration uses white LEDs as light, in the above only Example type or LEI of R, G, B-body type) In the case of R / G, B LEDs can also be used, the adjacent LED in column 丨;% RH uses R, G, B individual type

⑽ is the LED in the second column below the position of ^ and G

200426466 V. Description of the invention (23) It is better to use B LED. It is also possible to use full-color LEDs or ultraviolet LEDs. Of course, it is also possible to use light sources other than LEDs. In addition, it is not limited to the chip type LED, and the same effect can be obtained with the cannonball type LED. The arrangement of the light sources is not limited to the arrangement of two or more light sources 10 arranged in three rows. In the first and third embodiments, the light source 10a in the first row and the light source 10b in the second row are provided on the same side 3a of the light guide plate 3. However, they may be provided on the opposite sides of the light guide plate 3, respectively. For example, the light source 10a in the first row is provided on the side 3a and the light source 10b in the second row is provided on the opposite side of the side 3a. The light source 10b may be provided at a position corresponding to the light source 10a. This can contribute to the reduction in thickness of the planar light source device and the liquid crystal display device. The light source 10 does not have to be disposed opposite to the side surface 3a. For example, the light source 10 may be disposed on the back side of the light guide plate 3, and light may be transmitted through the light guide plate and reflection device for color mixing. Even in such an arrangement, the same effect can be obtained by arranging the light source 10 along the long side 3c of the side surface 3a. As described in Examples 1 to 3, by arranging the test sources 10 in the first and second columns apart from each other or arranging the light sources 10 in an inclined manner with respect to the long side direction of the side 3a, the dark portions between the light sources can be eliminated. , And can achieve uniform brightness. In addition, even if the size of the light sources 10, the light-emitting area 13, or the distance between the light sources cannot completely eliminate the dark portions between the light sources, the areas of the dark portions between the light sources can be reduced by the above configuration. As a result, it is possible to eliminate the brightness deviation of the planar light source device. The above-mentioned planar light source device is suitable for a display device such as a liquid crystal display device. Of course, this flat light source device can also be used for a display device other than a liquid crystal display device. Through the use of this flat light source device, the display quality of the display device can be improved.

2185-6188-PF (N2) .ptd Page 27 200426466 V. Description of the Invention (24) In addition, the size of the LED die shown in the above embodiment is a typical column and is not limited to this size. In addition, arranging a plurality of light sources of 10 or more and 2 rows along the long side 3 c of the side 3 a of the light guide plate can increase the brightness without increasing the thickness of the flat light source device and the liquid crystal display device. The substrate i j may be a thin substrate such as a soft tape, and two light sources 10 ′, which are arranged vertically, may be used. The reflection device 2 is not a separate individual component. The frame itself used to fix the light guide plate 3 and the reflective film is shaped with white resin or the like. It can also have a reflective function that guides the light from the light source 10 to the light guide plate. 3 direction reflection. ADVANTAGEOUS EFFECTS OF THE INVENTION According to the present invention, a light source device and a display can provide a display device that is thin and flat, and emits light without deviation, and is excellent in quality. surface

Page 28 200426466 Brief Description of Drawings Figure 1 is an exploded perspective view showing the structure of a liquid crystal display device according to the present invention. Fig. 2 is a sectional view showing the structure of a liquid crystal display device according to the present invention. Fig. 3 is a diagram showing a light source of a liquid crystal display device according to a first embodiment of the present invention. Fig. 4 is a perspective view showing a light source of a liquid crystal display device according to a first embodiment of the present invention. Fig. 5 is a front view showing the arrangement of a light source according to a second embodiment of the present invention. Fig. 6 is a front view showing the arrangement of a light source according to a third embodiment of the present invention. Fig. 7 is a perspective view showing a configuration of a liquid crystal display device according to the present invention. Fig. 8 is an exploded perspective view showing a configuration of a planar light source device according to a fourth embodiment of the present invention. Fig. 9 is a sectional view showing the structure of a planar light source device according to a fourth embodiment of the present invention. Fig. 10 is an enlarged perspective view showing a configuration of a light source of a planar light source device according to a fourth embodiment of the present invention. Fig. 11 is a front view showing the structure of a light source of a planar light source device according to a fourth embodiment of the present invention. Fig. 12 is a front view showing another configuration of a light source of a planar light source device according to a fourth embodiment of the present invention.

2185-6188-PF (N2) .ptd Page 29 200426466 Brief description of the drawings Fig. 13 is an exploded perspective view showing the structure of a planar light source device according to the fifth embodiment of the present invention. Fig. 14 is a sectional view showing the structure of a planar light source device according to a fifth embodiment of the present invention. Fig. 15 is a sectional view showing another configuration of a light source of a planar light source device according to a fifth embodiment of the present invention. Fig. 16 is a perspective view showing the structure of a light source of a flat light source device according to a sixth embodiment of the present invention. Fig. 17 is a perspective view showing a configuration of a light source of a flat light source device according to a sixth embodiment of the present invention. Fig. 18 is a perspective view showing a configuration of a flat light source device according to a sixth embodiment of the present invention. Fig. 19 is a sectional view showing the structure of a planar light source device according to a sixth embodiment of the present invention. Explanation of symbols: 1 ~ liquid crystal display device; 2 ~ reflecting device; 3 ~ light guide plate; 3 a ^-side of the light guide plate; 3b ~ top of the light guide plate; 3 c ^ ^ long side optical film on the side of the light guide plate; 5 ~ LCD panel, 6 ~ reflective film; 10-^ light source; 10a ~ 1st column light source; 10b ~ 2nd column light source; 11-^ substrate; 12--light emitting element 1 3 ~ light emitting field; 14- ^ fixture ;

2185-6188-PF (N2) .ptd p. 30 200426466

2185-6188-PF (N2) .ptd Page 31

Claims (1)

200426466 6. Scope of patent application 1. A flat light source device, comprising: a light guide plate that emits light incident from the side from above; light sources in the first column are arranged in plural along the long side of one side of the light guide plate; and The light sources in the second column are arranged in plural along the long side in a row different from the light sources in the first column; the light sources in the second column are arranged between the light sources in the first column. 2. The planar light source device according to item 1 of the scope of patent application, wherein the light sources in the first column and the light sources in the second column are arranged slightly parallel. 3. The planar light source device according to item 1 or 2 of the patent application, wherein the light source in the first column and the light source in the second column are arranged opposite to each other on the same side of the light guide plate. 4. The planar light source device according to item 1 or 3 of the scope of patent application, wherein the light source has a light emitting diode. 5. The planar light source device according to item 1, 2, 3, or 4 of the scope of the patent application, wherein the light source in the first column or the light source in the second column is inclined with respect to the side. 6. —A planar light source device comprising: a plurality of light sources having point-shaped light-emitting elements; and a light guide plate that guides light incident from the side to the entire surface and emits the light from above; characterized in that the aforementioned plurality of light sources It is arranged along the long side of 1 side of the light guide plate 2185-6188-PF (N2) .ptd Page 32 200426466 6 Patent Application Scope Each light source is set relative to 7. The long side is set obliquely as in the patent application scope. The light-emitting surface of the light source is a planar light source device returned by a member, and its t ο ^ τ τ rectangular grain-shaped light source. 8 · —A kind of plane light source device, a light guide plate, a reflecting device incident from the side, is equipped on the side of the light guide plate, and the wiring substrate is internally ^ 7 ,,, and added to the reflection The device and the side of the aforementioned light guide plate are arranged slightly perpendicularly; and again] a plurality of light sources 'use a surface that is slightly perpendicular to the actual assembly surface as a light emitting surface' It is mounted on the wiring board, and is characterized in that: the plurality of light sources are arranged in two rows along the long side of the side surface of the light guide plate. 9 · The planar light source device according to item 8 of the scope of patent application, wherein it is arranged among a plurality of light sources in the upper and lower rows, and the light sources in the upper rows are arranged on the above wiring substrate; and It is arranged in a plurality of light sources in the upper and lower columns, and the following light sources are arranged in the lower surface of the aforementioned wiring substrate. 10. The planar light source device according to item 8 of the scope of patent application, wherein the above-mentioned light sources and the following The light source is formed on the same surface of the wiring board; and the wiring board is bent so that the plurality of light sources & ' 200426466 VI. Application patent scope + / i · Flat light source device as described in the patent scope No. 1 ## Μ, among which the Kosuke can be resistant to 1 U items / r]] _ line substrate more A heat sink is provided. Meaning, f ^ The patent light source device described in item 8 of the above-mentioned plane light source device, wherein the wiring board includes: The light source listed above is actually assembled to the following light source actually installed above: i The first wiring board is mounted on the upper part of the projection device, and the second wiring board is mounted on the lower part of the 13. In the planar light source device described in Item 12 of the aforementioned V-Month Patent, the wiring board of Λ or the wiring board of No. 2 is provided with a heat sink in front of the reflecting device. Flat 1 surface 4, light as described in the ^ 11 patent Λ Wai item 8, 9, 10, U, 12 or 13 The foregoing list ::: put ’on! The light source of the spoon is not placed between the light sources described below. The planar light source device according to 4, 5, 6, 7, 8, 9, 10, u, 1o. 12, 13, or 14 items The first wiring board and the second wiring board