JP2010161016A - Sheet holder, light source device, and display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet holder for reducing the number of light sources and elongating a whole length of the sheet holder without forming a column-shaped part in a large diameter even if a separated distance between the light sources and an optical sheet is relatively long, for securing strength of the column-shaped part, and preventing occurrence of shades around the sheet holder, and provide a light source device and a display. <P>SOLUTION: The sheet holder includes two light reflecting faces 52a, 52b slanting to both side directions against the length direction of the column-shaped part 51 between a column-shaped part 51 of a nearly conical shape and regulating bending of an optical sheet and a fitting part for fitting the column-shaped part 51 to a supporting body 1 supporting a periphery of the optical sheet. Furthermore, a light reflecting part 52 with a width of the light reflecting faces 52a, 52b crossing at right angles with the length direction being about one to 4 times a diameter of a base end in the column-shaped part 51 is arranged, and the reflected light reflected by the light reflecting faces 52a, 52b negates shades around the column-shaped part 51. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sheet holder that restricts bending of an optical sheet provided in a display device, a light source device used as a light source of the display device, and a display device.

  In a display device such as a television, a light source device is disposed on the rear side of a display unit having a display surface for displaying an image on the front side, and the light source of the light source device emits light between the light source device and the display unit. An optical sheet for allowing light to enter the display unit is disposed.

  The light source device has a rectangular parallelepiped shape, a housing that supports the peripheral portion of the optical sheet, a plurality of light sources that are spaced apart from each other in the housing, and between the light source and the optical sheet, between adjacent light sources. And a sheet receiver that is attached and restricts the bending of the optical sheet by contacting the sheet surface of the optical sheet (see, for example, Patent Document 1).

  The sheet holder includes a columnar portion having a conical shape and a mounting plate portion that is connected to adjacent light sources in the housing, and the tip of the columnar portion is an optical sheet. By being in contact with one surface, the bending of the optical sheet is limited, and the distance between the optical sheet and the light source can be kept substantially uniform.

  In addition, the display device includes a display unit having a display surface on the front side, a light source device having a straight tube shape and a plurality of fluorescent lamps juxtaposed and a housing that accommodates and supports the fluorescent lamps, the light source device, and the display unit And an optical sheet on which light emitted from the fluorescent lamp is incident. The fluorescent lamp in the housing has a V-shaped cross section having two light reflecting surfaces between the fluorescent lamps, and the fluorescent lamp emits light. A columnar light reflector that reflects light toward the optical sheet is disposed, and a support protrusion that restricts the deflection of the optical sheet by contacting the top of the columnar light reflector with the sheet surface of the optical sheet. (For example, refer to Patent Document 2). The columnar light reflector is formed to be approximately the same length as the fluorescent lamp, and the two light reflecting surfaces are arranged in parallel with the fluorescent lamp, and are supported in the middle of the length direction of the columnar light reflector. The protrusion is integrally formed.

JP 2006-210337 A JP 2004-12728 A

  In a display device in which a light source device having a plurality of light sources that are spaced apart and juxtaposed as in Patent Document 1 and a sheet holder is used, the column in the sheet holder is reduced by reducing the juxtaposition interval of the light sources. Shadows can be prevented from appearing around the shape. However, the cost increases because the number of light sources increases.

  In a configuration where the number of light sources is reduced and the light source juxtaposition is widened, it is necessary to increase the separation distance between the light sources and the optical sheet in order to prevent shadows from appearing around the columnar portion of the sheet holder. is there. In this case, it is necessary to increase the length of the columnar portion in the sheet holder and limit the bending of the optical sheet.

  However, if the length of the columnar portion in the sheet holder is increased, the strength of the columnar portion against the bending load of the optical sheet is reduced, and abnormal noise such as squeak noise is likely to occur at the contact portion with the optical sheet. For this reason, it is necessary to increase the length of the columnar portion and to increase the strength of the columnar portion by forming the columnar portion with a large diameter.

  However, when the columnar part has a large diameter, when one side of the columnar part is irradiated with light emitted from one of the adjacent light sources, a shadow of the columnar part appears on the other side of the columnar part. When the other side of the columnar part is irradiated with light emitted from the other of the adjacent light sources, a shadow of the columnar part appears on one side of the columnar part, and this shadow appears on the display surface of the display unit. There is a problem that it will appear.

  Further, in a display device in which a support protrusion is provided on the top of a columnar light reflector formed to have a length substantially equal to that of a fluorescent lamp as in Patent Document 2, light emitted from an adjacent light source is columnar. Reflected by the two light reflecting surfaces of the shaped light reflector, this reflected light irradiates one side and the other side of the support protrusion. However, since the reflected light reflected by the two light reflecting surfaces is uniform along the fluorescent lamp, when one side surface of the supporting protrusion is irradiated with light emitted from one of the adjacent light sources, A shadow of the support protrusion appears on the other side surface, and when the other side surface of the support protrusion is irradiated with light emitted from the other of the adjacent light sources, a shadow of the support protrusion appears on one side surface of the support protrusion. There is a problem that shadows appear on the display surface of the display unit and uneven brightness occurs. In addition, since the columnar light reflector is almost the same length as the fluorescent lamp, the light reflector is large, and it is necessary to use a light reflector having a size corresponding to the size of the display device. There is no versatility of reflectors.

  The present invention has been made in view of such circumstances, and the main object is to form the columnar portion with a large diameter even when the number of light sources is reduced and the distance between the light sources and the optical sheet is relatively long. The sheet holder can be made longer without the need to extend the entire length of the sheet holder, ensure the strength of the columnar section, and prevent shadows from appearing around the columnar section of the sheet holder. It is in providing a tool, a light source device, and a display apparatus.

  The sheet holder according to the present invention has a substantially conical shape, and a columnar portion that restricts the deflection of the optical sheet by the tip contacting the sheet surface of the optical sheet and the peripheral portion of the optical sheet. A sheet holder having an attachment portion attached to a support body that supports two light reflection surfaces inclined laterally with respect to the length direction of the columnar portion, and the length of the light reflection surface A light reflecting portion having a width in a direction orthogonal to the direction that is approximately 1 to 4 times the diameter of the base end of the columnar portion is disposed between the columnar portion and the mounting portion.

  In this invention, since there is a light reflecting portion between the columnar portion and the mounting portion, the overall length can be increased without forming the columnar portion with a large diameter, and the bending load of the optical sheet can be increased. Strength can be obtained. Moreover, since the two light reflecting surfaces of the light reflecting portion are about 1 to 4 times as wide as the diameter of the base end of the columnar portion, the reflected light reflected by the two light reflecting surfaces is one of the columnar portions. The side surface side and the other side surface side are irradiated, and it is possible to eliminate the appearance of a shadow around the columnar part. That is, when one side of the columnar part is irradiated with light emitted from one of the adjacent light sources, a shadow of the columnar part appears on the other side of the columnar part, and the other of the adjacent light sources emits light. When the other side of the columnar part is irradiated with light, a shadow of the columnar part appears on one side of the columnar part. It can be canceled by the reflected light reflected by the light reflecting surface, and the shadow appearing on the other side of the columnar part can be canceled by the reflected light reflected by the other light reflecting surface, around the columnar part. You can eliminate the appearance of shadows. When the width of the two light reflecting surfaces is less than 1 times the diameter of the base end, the reflected light reflected by the two light reflecting surfaces may sufficiently irradiate both side surfaces of the columnar part. Since it is not possible, a shadow is likely to appear around the columnar part. Further, when the width of the two light reflecting surfaces exceeds four times the diameter of the base end, a shadow tends to appear on the peripheral surface side between the one side surface and the other side surface in the columnar part.

Moreover, it is preferable that the sheet | seat holder which concerns on this invention sets it as the structure whose width | variety of said two light reflection surfaces is 5-20 mm.
In this invention, since the width of the two light reflecting surfaces is 5 to 20 mm, the reflected light reflected by the two light reflecting surfaces irradiates one side surface and the other side surface of the columnar part. It is possible to prevent shadows from appearing around the columnar part. When the width of the two light reflecting surfaces is less than 5 mm, the reflected light reflected by the two light reflecting surfaces cannot sufficiently irradiate both side surfaces of the columnar part. A shadow is likely to appear on the screen. Further, when the width of the two light reflecting surfaces exceeds 20 mm, uneven brightness tends to occur on the peripheral surface side between the one side surface and the other side surface in the columnar part.

In the sheet receiver according to the present invention, it is preferable that the two light reflecting surfaces are inclined by 30 to 60 degrees with respect to the length direction.
In the present invention, since the amount of light reflected around the columnar portion by the two light reflecting surfaces can be made relatively large, no shadow appears around the columnar portion. In addition, when the inclination is less than 30 degrees with respect to the length direction, the amount of light reflected in a direction away from the peripheral surface of the columnar portion increases, and a shadow is easily generated around the columnar portion. The brightness around the part cannot be made uniform. In addition, when the inclination is more than 60 degrees with respect to the length direction, the amount of light that is secondarily reflected on the peripheral surface of the columnar part increases, and shadows are likely to appear around the columnar part. The brightness cannot be made uniform.

In the sheet receiver according to the present invention, it is preferable that the light reflecting portion has a through hole having an inner surface substantially parallel to the two light reflecting surfaces.
In this invention, since the light emitted from the light source passes through the through hole of the light reflecting portion, the luminance around the light reflecting portion can be made more uniform.

Moreover, it is preferable that the sheet | seat holder which concerns on this invention is set as the structure by which the protruding item | line part is distribute | arranged to the inner surface of the said through hole in the said inclination direction.
In this invention, the intensity | strength of the light reflection part with respect to the bending load of an optical sheet can be raised.

Moreover, it is preferable that the sheet | seat holder which concerns on this invention sets it as the structure where the peripheral part of said two light reflection surfaces is a rough surface.
According to the present invention, the light emitted from the light source is adjusted and reflected by the two light reflecting surfaces to the one side surface and the other side surface of the columnar part, and is irregularly reflected by the rough surface of the light reflecting surface. Since irregularly reflected light can be generated around the light, the luminance around the columnar portion can be made even more uniform.

The light source device according to the present invention is mounted between a plurality of light sources arranged side by side, a support member that supports the optical sheet on which the light source and light emitted from the light source are incident, and the light source in the support member. It is provided with the sheet | seat holder of invention mentioned above.
In this invention, there is a light reflecting portion between the columnar portion and the mounting portion, and the light reflecting portion separates the columnar portion from the mounting portion. Because it is attached, even when the number of light sources juxtaposed is reduced, the overall length of the sheet holder can be increased without forming the columnar part with a large diameter, and the strength against the bending load of the optical sheet is ensured. In addition, the light emitted from the adjacent light source can be reflected by the two light reflecting surfaces and irradiated around the columnar part, so that no shadow appears around the columnar part. it can.

In the light source device according to the present invention, the light source has a cylindrical shape, and the sheet holder is arranged at a central portion between adjacent light sources so that the two light reflecting surfaces are parallel to the light source. It is preferable to adopt the configuration described above.
In this invention, the mounting portion of the sheet receiver having a light reflecting portion between the columnar portion and the mounting portion, the light reflecting portion separating the columnar portion from the mounting portion, the seat Since the two light reflecting surfaces of the receiver are mounted in the center between adjacent light sources so that they are parallel to the light source, the light emitted by the adjacent light sources can be reduced even when the number of light sources arranged in parallel is reduced. Since the light can be efficiently reflected by the two light reflecting surfaces and can be efficiently irradiated around the columnar part, it is possible to prevent a shadow from appearing around the columnar part.

In the light source device according to the present invention, the light source has a cylindrical shape, includes a plurality of clips attached to the support body, holding a middle portion in the longitudinal direction of the light source, and the sheet holders are adjacent to each other. It is preferable that the light source is arranged so as to be spaced apart from each other in the length direction of the light source between the light sources.
In the present invention, the clip is disposed on the light source having a cylindrical shape, and the sheet holder is disposed between the adjacent light sources and at a position separated from the clip in the length direction of the light source. Even when the number of light sources juxtaposed is reduced, the shadow around the sheet holder can be eliminated without being affected by the clip, and the clip can be eliminated without being affected by the sheet holder. You can prevent shadows from appearing around you.

In the light source device according to the present invention, it is preferable that the sheet holder has a configuration in which the two light reflecting surfaces are arranged in parallel with the light source.
In the present invention, the sheet holder disposed at a position separated from the clip in the length direction of the light source is adjacent to the light source so that the two light reflecting surfaces of the sheet holder are parallel to the light source. Since it is attached in between, the light emitted from the adjacent light source can be efficiently reflected by the two light reflecting surfaces, and the periphery of the columnar part can be efficiently irradiated. Therefore, it is possible to prevent a shadow from appearing around the columnar part.

Further, the display device according to the present invention includes a display unit having a display surface on one side, the light source device of the above-described invention disposed on the other side of the display unit, and the light emitted from the light source. And an optical sheet incident on the head.
In this invention, there is a light reflecting portion between the columnar portion and the mounting portion, and the optical sheet can be extended with a sheet holder that can increase the overall length without forming the columnar portion with a large diameter. Since bending can be limited, even when the number of juxtaposed light sources is reduced, shadows can be prevented from appearing around the sheet holder, and the brightness of the entire irradiation range irradiated by the light sources can be made uniform. it can.

  As described above in detail, according to the present invention, there is a light reflecting portion between the columnar portion and the mounting portion, and the light reflecting portion separates the columnar portion from the mounting portion. The overall length can be increased without forming a large diameter, the strength against the bending load of the optical sheet can be obtained, and the appearance of shadows around the sheet holder can be eliminated.

  According to the invention, there is a light reflecting portion between the columnar portion and the mounting portion, and the mounting portion of the sheet receiver in which the light reflecting portion separates the columnar portion from the mounting portion is the support. Therefore, even when the number of light sources juxtaposed is reduced, the overall length of the sheet holder can be increased without forming the columnar portion with a large diameter, and the strength against the bending load of the optical sheet can be increased. In addition, the light reflected from the adjacent light source can be reflected by the light reflecting portion and irradiated around the columnar portion, so that no shadow appears around the sheet holder. .

It is a front view which shows the structure of the light source device which concerns on this invention. It is the perspective view which expanded a part of light source device concerning the present invention. It is sectional drawing which expanded a part which shows the structure of the light source device which concerns on this invention. It is a front view which shows the structure of the support body of the light source device which concerns on this invention. It is a perspective view which shows the structure of the sheet | seat holder with which the light source device which concerns on this invention is provided. It is explanatory drawing which shows the relationship between the light which the light source of the light source device which concerns on this invention light-emitted, and a sheet | seat holder. It is explanatory drawing which shows the relationship between the light which the light source of the light source device which concerns on this invention light-emitted, and a sheet | seat holder. It is sectional drawing which shows the structure of a display apparatus provided with the light source device which concerns on this invention. It is a perspective view which shows the other structure of the sheet | seat holder with which the light source device which concerns on this invention is provided.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is a front view showing a configuration of a light source device according to the present invention, FIG. 2 is a partially enlarged perspective view of the light source device, and FIG. 3 is a partially enlarged sectional view showing the configuration of the light source device.

  The light source device shown in the figure has a box-shaped rectangular parallelepiped, and has a support body 1 that supports the peripheral edge of the optical sheet at the open end and a cylindrical shape, and is substantially vertically spaced in the support body 1. A plurality of light sources 2 arranged side by side, holders 3 and 3 that hold both ends of the light source 2 inside the support 1, and a synthetic resin that holds the middle in the length direction of the light source 2 and is attached to the support 1 A plurality of clips 4 made of plastic, and a sheet receiver 5 made of synthetic resin that is attached to the support 1 and restricts the bending of the optical sheet. The inner surface portion of the support 1 is a light reflection surface that should reflect the light emitted from the light source 2 toward the open side of the support 1. The light reflecting surface is a surface that the support 1 itself reflects, or may be a light reflecting layer that is separate from the support 1.

  FIG. 4 is a front view showing the structure of the support. The support body 1 is formed by molding a metal plate, and has a rectangular plate portion 11 and a frame portion 12 connected to the periphery of the plate portion 11, and the plate portion 11 includes a plurality of clips 4 for attaching clips 4. A first attachment hole 13 and a plurality of second attachment holes 14 for attaching the sheet receiver 5 are opened.

  As shown in FIG. 4, the first mounting holes 13 are opened by being alternately biased in the length direction at positions facing the central portions in the length direction of the respective light sources 2. As shown in FIG. 4, the second mounting hole 14 is formed at a central portion between the adjacent light sources 2 and 2 and at a position separated from the clip 4 in the length direction of the light source 2. The first and second mounting holes 13 and 14 are round. The first mounting holes 13 are provided corresponding to the number of the light sources 2, and the second mounting holes 14 are provided separately in the juxtaposition direction of the light sources 2 regardless of the number of the light sources 2. Further, the second mounting holes 14 are arranged at two locations on one of the two diagonals of the support 1.

  The light source 2 is a cold cathode tube having a cylindrical shape and electrodes at both ends. An inverter circuit board is connected to the electrode of each light source 2, and the brightness is controlled by a pulse width modulation signal. Yes.

  The clip 4 faces the reflecting surface of the support 1 and has a rectangular substrate 41, a holding portion 42 in which the intermediate portion in the longitudinal direction of the light source 2 is fitted and held, and a projection provided on the other surface of the substrate 41. It has the attachment part 43 inserted and latched by the 1 attachment hole 13, and is integrally molded by the polycarbonate excellent in heat resistance and light reflectivity. The holding portion 42 has two holding pieces that hold the light source 2 in opposition to be spaced apart from each other in the juxtaposition direction of the light source 2. The attachment portion 43 has two claw portions at the tip of the plate-like protruding piece, and the claw portion is locked to the hole edge portion of the first attachment hole 13.

  FIG. 5 is a perspective view showing the configuration of the sheet receiver. The sheet holder 5 has a columnar part 51 that limits the deflection of the optical sheet by contacting the sheet surface of the optical sheet, and a columnar part that connects the base end of the columnar part 51 and emits light emitted from the light source. The light reflecting portion 52 that reflects toward one side and the other side of the portion 51, in other words, reflects toward the optical sheet, and is connected to the light reflecting portion 52 and is inserted into and locked in the second mounting hole 14. It has an attachment portion 53 and is integrally formed of polycarbonate having excellent light reflectivity.

  The columnar portion 51 has a substantially conical shape in which the volume gradually decreases from the proximal end connected to the light reflecting portion 52 to the distal end. The diameter of the base end of the columnar part 51 is about 4 to 5 mm. The peripheral surface between the one side surface 51a and the other side surface 51b of the base end portion in the columnar portion 51 is cut out along the length direction, and the cross-sectional shape of the base end portion is non-circular. It may have a cross-sectional shape.

  In the light reflecting portion 52, the internal volume of the cross section in the direction orthogonal to the length direction of the columnar portion 51 gradually decreases from the mounting portion 53 to the base end of the columnar portion 51, As shown in FIG. 3, the wedge-shaped side view has two light reflecting surfaces 52a and 52b inclined to both sides. The width of the light reflecting surfaces 52a and 52b in the direction perpendicular to the length direction is 5 to 20 mm, preferably about 10 mm, and the columnar portion 51 is arranged at the center in the width direction of the light reflecting surfaces 52a and 52b. The base end of the columnar part 51 is coupled across the light reflecting surfaces 52a and 52b. The light reflecting surfaces 52 a and 52 b are inclined by about 45 degrees with respect to the length direction of the columnar portion 51. The width of the light reflecting surfaces 52a and 52b is about 1 to 4 times, preferably about 2 times, the diameter of the base end of the columnar part 51.

  The light reflecting portion 52 is provided with a triangular through hole 54 having an inner surface substantially parallel to the two light reflecting surfaces 52 a and 52 b, and the inclined direction at the center in the width direction of the inner surface of the through hole 54. Convex ridges 55 are provided, and the light reflecting surfaces 52a and 52b have a substantially T-shaped cross section to enhance the rigidity of the light reflecting portion 52.

  The mounting portion 53 has one surface connected to the base end of the light reflecting portion 52 and the other surface facing the reflecting surface of the support 1 and a plate-like protruding piece 53b protruding from the other surface of the substrate 53a. And two claw portions 53c connected to the tip of the plate-like projecting piece 53b, and the claw portion 53c is locked to the hole edge portion of the second mounting hole 14.

  In the light source device A configured as described above, the mounting portion 43 of the clip 4 is inserted and locked in the first mounting hole 13 of the support 1, and the plurality of light sources 2 are juxtaposed in the support 1. Both end portions of the light source 2 are held in the support 1 by the holders 3 and 3, and an intermediate portion of the light source 2 is inserted and clamped by the clamping portion 42 of the clip 4. Further, the attachment portion 53 of the sheet holder 5 is inserted and locked in the second attachment hole 14 of the support 1.

  As shown in FIG. 1, the clips 4 attached to the first attachment holes 13 are alternately biased in the length direction of the light source 2, and the sheet holder 5 attached to the second attachment hole 14 is As shown in FIG. 1, the light reflecting surfaces 52 a and 52 b are parallel to the light source 2 at two locations on one diagonal of the support 1 and at positions spaced from the clip 4 in the length direction of the light source 2. Are arranged so as to face each other.

  The light emitted from the light source 2 irradiates the clip 4, the sheet holder 5, and the light reflecting surface in the support 1. Since the clip 4 has a relatively short length with respect to the light reflecting surface in the support 1 and the clip 4 itself is made of synthetic resin having excellent light reflectivity, the clip 4 is reflected by the light reflected by the light reflecting surface. The brightness around can be made uniform.

  The sheet holder 5 has a relatively long length with respect to the reflection surface in the support 1, but has a light reflecting portion 52 between the columnar portion 51 and the mounting portion 53, and the columnar portion 51 is formed to have a large diameter. The total length of the sheet holder 5 can be increased without doing so.

  6 and 7 are explanatory views showing the relationship between the light emitted from the light source and the sheet holder. When only one of the adjacent light sources 2 and 2 emits light, as shown in FIGS. 6 and 7, one side surface 51a and one light reflecting surface 52a of the columnar part 51 are irradiated, and the other side surface 51b of the columnar part 51 is irradiated. Since the other light reflecting surface 52b is not irradiated, shadows appear on the other side surface 51b side of the columnar part 51 and the other light reflecting surface 52b side.

  When only the other of the adjacent light sources 2 and 2 emits light, the other side surface 51b of the columnar part 51 and the other light reflecting surface 52b are irradiated as shown in FIGS. 6 and 7, and one side surface 51a of the columnar part 51 is irradiated. Since one light reflecting surface 52a is not irradiated, a shadow appears on one side 51a side and one light reflecting surface 52a side of the columnar portion 51.

  When each of the adjacent light sources 2 and 2 emits light, as shown in FIG. 7, one side surface 51a, the other side surface 51b, and the two light reflecting surfaces 52a and 52b of the columnar part 51 are irradiated. Therefore, the light reflected on the one light reflecting surface 52a cancels the shadow appearing on the one side surface 51a side and the one light reflecting surface 52a side of the columnar portion 51, and the other side surface 51b side of the columnar portion 51 and The light reflected by the other light reflecting surface 52b cancels the shadow appearing on the other light reflecting surface 52b side. At this time, the light reflecting surfaces 52 a and 52 b inclined by about 45 degrees with respect to the length direction of the columnar part 51 are formed to have a width of about 1 to 4 times the diameter of the base end of the columnar part 51. In addition, since the sheet holder 5 is arranged so that the light reflecting surfaces 52a and 52b are parallel to the light sources 2 and 2 at the central portion between the adjacent light sources 2 and 2, the light reflecting surfaces 52a and 52b. 7 is reflected at an angle of about 45 degrees on the light reflecting surfaces 52a and 52b as indicated by arrows in FIG. 7, and the reflected light is efficiently reflected on the one side surface 51a side and the other side surface 51b side of the columnar portion 51. Can be irradiated well. Therefore, it is possible to eliminate a shadow from appearing around the columnar portion 51 and to uniformize the luminance of the entire irradiation range irradiated by the light source 2.

  Further, since the sheet holder 5 is arranged at a position separated from the clip 4 in the length direction of the light source 2, the sheet holder 5 is not affected by the clip 4 and is not affected by the shadow around the columnar part 51 and the light reflecting part 52. Can be prevented from appearing.

  FIG. 8 is a cross-sectional view illustrating a configuration of a display device including a light source device. The light source device A is used in a liquid crystal display device such as a liquid crystal television.

  As shown in FIG. 8, the liquid crystal display device includes a display unit 6 having a display surface on the front side and having a substantially rectangular parallelepiped shape, a light source device A disposed on the rear side of the display unit 6, and the light source device A and the display unit. 6, and an optical sheet 7 that enters light emitted from the light source 2 to the display unit 6, and a cabinet 8 that covers the periphery of the display unit 6 and the rear side of the light source device A.

  The display unit 6 includes a display panel 61 having polarizing plates attached to the front and rear sides, and a front holding frame body 62 and a rear holding frame body 63 that hold and hold the peripheral edge of the display panel 61 in the front and rear directions. The peripheral edge portion is supported by the open end of the support 1.

  The optical sheet 7 is a relatively thick wall for diffusing the light emitted from the light source 2, and a relatively thin wall such as a translucent and flexible diffusion plate, a reflective polarizing sheet, a prism sheet, and a diffusion sheet. It is a laminated body in which a synthetic resin sheet having optical properties and flexibility is laminated, is formed in a substantially rectangular shape corresponding to the display portion 6, and the peripheral edge is at the open end of the support 1. It is supported.

  As shown in FIG. 3, the sheet holder 5 attached to the support 1 that supports the peripheral edge of the optical sheet 7 is positioned opposite the central portion of the optical sheet 7, and the tip of the columnar portion 51 is optical. They face each other at a slight distance so as to come into contact with one surface of the sheet 7, limit the bending of the optical sheet 7, and keep the distance between the optical sheet 7 and the light source 2 even.

  The light emitted from the light source 2 irradiates the optical sheet 7, the clip 4, the sheet receiver 5, and the reflecting surface in the support 1. By this irradiation, the brightness around the clip 4 can be made uniform, and the brightness around the columnar part 51 and the light reflecting part 52 in the sheet receiver 5 can be made uniform.

  FIG. 9 is a perspective view showing another configuration of the sheet holder provided in the light source device. In this sheet receiver 5a, the peripheral portions of the two light reflecting surfaces 52a and 52b are rough surfaces, and the light irradiated to the light reflecting surfaces 52a and 52b is diffusely reflected by the rough surface portion 52c to be reflected on the light reflecting surfaces 52a and 52b. Thus, irregularly reflected light is generated around the regularly reflected light that is regularly reflected toward the one side surface 51a side and the other side surface 51b side of the columnar part 51.

  The rough surface portion 52c is a satin having minute irregularities, and the roughness of the central side (the center side of the light reflecting surfaces 52a and 52b) and the peripheral side of the rough surface portion 52c is different, for example, the central side is fine or mirrored. By roughening the peripheral side, the state of irregular reflection is changed, and the periphery of the regularly reflected light is configured to be blurred reflected light.

  In this embodiment, since the surroundings of the regularly reflected light reflected by the two light reflecting surfaces 52a and 52b are blurred reflected light, the luminance around the columnar portion 51 is further increased. It is possible to equalize and prevent more shadows from appearing around the columnar portion 51.

  Since other configurations and operations are the same as those of the light source device shown in FIGS. 1 to 7, the same components are denoted by the same reference numerals, and detailed descriptions and descriptions of the operations and effects are omitted.

  In the embodiment described above, the light source 2 having a cylindrical shape is provided. However, the light source 2 may be a light emitting diode, and the configuration of the light source 2 is not particularly limited.

  Further, in the embodiment described above, the sheet receiver 5 is disposed at two locations on one of the two diagonals of the support 1, but the sheet receiver 5 is also the support 1. It is good also as a structure which has distribute | arranged to two each on two diagonals, or three or more places, and the number and arrangement | positioning location of the sheet | seat holder 5 are not specifically limited.

  In the embodiment described above, the light reflection surfaces 52a and 52b are inclined by about 45 degrees with respect to the length direction of the columnar portion 51. The inclination angle may be 60 degrees.

  In the embodiment described above, the columnar portion 51 is preferably a conical shape whose volume gradually decreases from the proximal end connected to the light reflecting portion 52 to the distal end, but the proximal end side has a cylindrical shape. The tip side may have a conical shape, and the columnar portion 51 may be substantially conical.

  In the embodiment described above, the light reflecting portion 52 having the through hole is used. However, the light reflecting portion 52 may have a configuration without the through hole. Moreover, when it has a through-hole, the shape of this through-hole is not restrict | limited in particular.

  Further, in the embodiment described above, the sheet holder 5 is made of polycarbonate. However, any other material may be used as long as it is made of synthetic resin having high light reflectivity, and a paint having high light reflectivity is applied. It is good also as a structure.

DESCRIPTION OF SYMBOLS 1 Support body 2 Light source 4 Clip 5,5a Sheet | seat holder 51 Column-shaped part 52 Light reflection part 52a, 52b Light reflection surface 53 Mounting part 54 Through-hole 55 Projection part 6 Display part 7 Optical sheet A Light source device

Claims (11)

  A columnar portion that has a substantially conical shape, the tip of which contacts the sheet surface of the optical sheet and restricts the bending of the optical sheet, and a mounting portion that mounts the columnar portion to a support that supports the peripheral portion of the optical sheet A sheet holder having two light reflecting surfaces inclined laterally with respect to the length direction of the columnar portion, and the width of the light reflecting surface in a direction perpendicular to the length direction is A sheet receiver, wherein a light reflecting portion, which is about 1 to 4 times the diameter of the base end of the columnar portion, is arranged between the columnar portion and the mounting portion.   The sheet holder according to claim 1, wherein the width of the two light reflecting surfaces is 5 to 20 mm.   The sheet receiver according to claim 1, wherein the two light reflecting surfaces are inclined by 30 to 60 degrees with respect to the length direction.   4. The sheet receiver according to claim 1, wherein the light reflecting portion has a through hole having an inner surface substantially parallel to the two light reflecting surfaces. 5.   The sheet holder according to claim 4, wherein the inner surface of the through-hole is provided with a ridge portion in the inclined direction.   The sheet receiver according to any one of claims 1 to 5, wherein a peripheral portion of the two light reflecting surfaces is a rough surface.   A plurality of light sources arranged side by side, a support member that supports the optical sheet on which the light source and light emitted from the light source are incident, and the light source in the support member are attached between the light sources. A light source device comprising the sheet receiver according to claim 1.   The light source device according to claim 7, wherein the light source has a cylindrical shape, and the sheet holder is arranged at a central portion between adjacent light sources so that the two light reflecting surfaces are parallel to the light source. .   The light source has a cylindrical shape, and includes a plurality of clips attached to the support body, holding a middle portion in a longitudinal direction of the light source, and the sheet holder is disposed between adjacent light sources with respect to the clips. The light source device according to claim 7, wherein the light source device is spaced apart in the length direction of the light source.   The light source device according to claim 9, wherein the sheet holder is disposed such that the two light reflecting surfaces are parallel to the light source.   A display unit having a display surface on one side, the light source device according to any one of claims 7 to 10 disposed on the other side of the display unit, and light emitted from the light source to the display unit A display device comprising an incident optical sheet.

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