JP6448428B2 - Light source device and display device - Google Patents

Description

  The present invention relates to a light source device and a display device.

  A display device including a liquid crystal panel as an image display unit is used in a television receiver, an information display, and the like. The display device has a backlight device disposed on the opposite side of the display surface of the liquid crystal panel as a light source device, and modulates and transmits the light emitted from the backlight device by the liquid crystal panel. It is configured to display an image. Backlight devices are roughly classified into direct-type and edge-light types, but direct-type backlight devices are widely used in large display devices that require high image quality.

  The direct type backlight device includes a light source such as an LED or a cold cathode tube disposed on the bottom plate of the box-like body, and an optical member such as a diffusion plate and a prism sheet that covers the opening of the box-like body facing the bottom plate. And an optical member such as a diffusion plate or a prism sheet located on the opening side of the box-shaped body. The backlight device has a rod-like support that is erected from the bottom plate of the box-like body and supports the optical member by a tip, and is configured so that the optical member does not fall into the box-like body by the support Has been.

  For example, Patent Document 1 discloses a display device (television receiver) in which the support (support pin) that is handled as a separate member from the box-like body is attached to the box-like body.

International Publication No. 2010/146932

  However, when the support is handled as a separate part from the box-shaped body of the backlight device, there are problems that the number of parts of the display device is large, the number of assembling steps increases, and the cost increases.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a light source device and a display device that can reduce the number of parts, the number of assembly steps, and the cost. It is in.

  A light source device according to the present invention is integrally formed with a light source disposed on a bottom plate of a box-shaped body having an opening, an optical member that covers the opening of the box-shaped body facing the bottom plate, and the box-shaped body, And a support that protrudes from the inner wall of the box-shaped body toward the opening and supports the optical member by a tip.

  The light source device according to the present invention is characterized in that the box-shaped body and the support body are integrated by insert molding or two-color molding.

  The light source device according to the present invention is characterized in that the support is white or transparent.

  The light source device according to the present invention is characterized in that the box-shaped body is white or transparent.

  A display device according to the present invention includes a display panel and the light source device described above disposed on the opposite side of the display surface of the display panel.

  According to the present invention, it is possible to reduce the number of parts, the number of assembly steps, and the cost.

1 is a perspective view of a display device according to Embodiment 1. FIG. It is a disassembled perspective view of a display apparatus. It is typical sectional drawing of a display apparatus. It is the elements on larger scale of the baseplate of a chassis. It is a perspective view of the chassis with which the reflective sheet was attached. 6 is a schematic cross-sectional view of a display device according to Embodiment 2. FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a perspective view of the display device according to the first embodiment. In FIG. 1, reference numeral 1 denotes a display device. As shown in the figure, the display device 1 includes a rectangular liquid crystal panel 2 having a display surface and a backlight device 3 disposed on the opposite side of the display surface of the liquid crystal panel 2. Prepare. The display device 1 is used with the display surface of the liquid crystal panel 2 as the front. The display device 1 includes a tuner 11 that receives broadcast waves from an antenna and a decoder 12 that decodes encoded broadcast waves. The display device 1 is configured as a television receiver.

  FIG. 2 is an exploded perspective view of the display device 1, and FIG. 3 is a schematic cross-sectional view of the display device 1. The backlight device 3 includes a chassis 30, a plurality of LEDs 31, 31,..., A plurality of substrates 32, 32,. 2 and a reflection sheet 33 and an optical member 34 disposed between the chassis 30.

  The chassis 30 is made of a white resin, has a rectangular bottom plate 30a, and side plates 30b rising from the four sides of the bottom plate 30a, and has a shallow box shape with an opening provided on the liquid crystal panel 2 side. . A flange portion 30c projecting outward is provided at the opening edge of the side plate 30b.

  The substrate 32 has a strip shape, and a plurality of LEDs 31, 31,... (Seven in the figure) are mounted at predetermined intervals along the longitudinal direction. The substrates 32 are accommodated in the chassis 30 side by side in the short direction of the bottom plate 30a in parallel with each other.

  FIG. 4 is a partially enlarged view of the bottom plate 30 a of the chassis 30. A plurality of holding bodies 35, 35,... That hold the substrate 32 protrude from the bottom plate 30 a of the chassis 30. Further, the holding bodies 35 are arranged in parallel at predetermined intervals in the longitudinal direction and the short direction of the bottom plate 30a. Each holding body 35 has a recess, and each substrate 32 is fitted in the recess of each holding body 35 arranged in the longitudinal direction, and is held floating from the bottom plate 30a.

  Furthermore, a plurality of support pins 36 for supporting the optical member 34 are provided on the bottom plate 30a. Each support pin 36 is located between each substrate 32. The support pin 36 is embedded in a recessed portion 30d provided at a position corresponding to the bottom plate 30a of the chassis 30, is erected perpendicular to the bottom plate 30a, and is integrated with the bottom plate 30a. The support pin 36 includes a flat plate portion 36a that is provided in the middle of the axial direction.

  In manufacturing the chassis 30, the support pins 36 are prepared in advance. The support pins 36 are made of the same white resin as the chassis 30 and are integrated with the chassis 30 by molding the chassis 30 in a state where the support pins 36 are arranged in the mold of the chassis 30. That is, the support pin 36 and the chassis 30 are integrally formed by so-called insert molding. The support pins 36 and the chassis 30 may be integrally formed by two-color molding.

  FIG. 5 is a perspective view of the chassis 30 to which the reflection sheet 33 is attached. The reflection sheet 33 has a shape corresponding to the chassis 30, and is attached so as to cover the entire inside of the chassis 30 with the peripheral edge overlapped with the flange portion 30 c. The reflection sheet 33 is provided with holes at positions corresponding to the LEDs 31, the holding bodies 35, and the support pins 36. Each LED 31, each holding body 35, and each support pin 36 are exposed to the opening side of the chassis 30 from the respective holes, and the reflection sheet 33 is placed on each substrate 32 and the flat plate portion 36 a of each support pin 36. ing. The light from the LED 31 can be effectively applied to the optical member 34 by the reflection sheet 33.

  The optical member 34 is configured by overlapping a plurality of rectangular optical sheets 34b such as prism sheets on a rectangular diffusion plate 34a. The diffusion plate 34 a of the optical member 34 is disposed so as to overlap the reflection sheet 33 at the flange portion 30 c of the chassis 30. The diffusion plate 34a covers the entire opening of the chassis 30, and the peripheral edge of the diffusion plate 34a is supported by the flange portion 30c. The protruding end of the support pin 36 is in contact with one surface of the optical member 34, and the diffusion plate 34 a is supported by each support pin 36. That is, the optical member 34 is supported by the support pin 36. Since each support pin 36 is distributed and arranged over the entire bottom plate 30a, the optical member 34 is supported by each support pin 36 in a well-balanced manner.

  A panel chassis 4 and a front cabinet 5 are arranged on the display surface side of the liquid crystal panel 2. The panel chassis 4 includes a frame-shaped front plate 4a and side plates 4b that rise vertically from the outer peripheral edge of the front plate 4a. The panel chassis 4 supports the liquid crystal panel 2 from the opposite side of the display surface by the front plate 4a. The panel chassis 4 supports the side plate 4 b on the flange portion 30 c of the chassis 30. Further, the front plate 4a of the panel chassis 4 holds the reflection sheet 33 and the diffusion plate 34a between the flange portion 30c.

  The front cabinet 5 has a frame-shaped front plate 5a and side plates 5b that rise vertically from the outer peripheral edge of the front plate 5a. The front plate 5 a of the front cabinet 5 sandwiches the liquid crystal panel 2 with the front plate 4 a of the panel chassis 4. The side plate 5 b is in contact with the side plate 4 b of the panel chassis 4. The liquid crystal panel 2 is sandwiched between the front plate 5 a of the front cabinet 5 and the front plate 4 a of the panel chassis 4.

  In the display device 1 configured as described above, the light emitted from each LED 32 is diffused and converged by the optical member 34 and irradiated to the back surface of the liquid crystal panel 2. The liquid crystal panel 2 modulates and transmits incident light and displays an image on the front. The display device 1 displays an image on the display surface of the liquid crystal panel 2 based on the broadcast wave of the television broadcast received by the tuner 11 and decoded by the decoder 12, and functions as a television receiver.

  According to the above configuration, since the optical member 34 is supported by the support pins 36, it is possible to maintain a posture facing the liquid crystal panel 2 and to maintain good image quality. Further, each support pin 36 is formed integrally with the chassis 30 by insert molding or two-color molding, and the chassis 30 and each support pin 36 can be handled as one part, so that the number of parts can be reduced and the number of assembly steps can be reduced. Reduction and cost reduction. Further, by appropriately arranging the plurality of support pins 36, the chassis 30 having the support pins 36 can be manufactured corresponding to various sizes.

Since the chassis 30 and the support pins 36 are white, they have high reflectivity, can prevent shadows caused by light from the LEDs 32, and can prevent display quality from deteriorating. Further, since the chassis 30 is not colored, it is possible to reduce the number of assembly steps and the cost.
The chassis 30 and the support pins 36 may be configured to be transparent instead of white. In this configuration as well, it is possible to prevent the occurrence of shadows due to light from the LEDs 32 and to prevent deterioration in display quality. it can. Further, since the chassis 30 is not colored, it is possible to reduce the number of assembly steps and the cost.

  Further, each support pin 36 is not limited to the configuration provided on the bottom plate 30 a, and may be provided on the side plate 30 b and other locations as long as it protrudes from the inner wall of the chassis 30 toward the opening.

  Furthermore, the display device 1 may have a configuration used for an information display or a personal computer, instead of a configuration used for a television receiver.

(Embodiment 2)
FIG. 6 is a schematic cross-sectional view of the display device 1 according to the second embodiment. About the structure of the display apparatus 1 which concerns on Embodiment 2, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  In the second embodiment, the chassis 30 and the support pins 36 are formed from the same transparent resin by a single mold. The portions corresponding to the chassis 30 are colored, while the portions corresponding to the support pins 36 are not colored and are transparent.

  According to the above configuration, the chassis 30 and the support pins 36 are formed by a single mold, and the chassis 30 and each support pin 36 can be handled as one part. Therefore, the number of parts can be reduced and the number of assembly steps can be reduced. Reduction and cost reduction.

  Further, since the support pins 36 are transparent, it is possible to suppress the occurrence of shadows due to the light from the LEDs 32 and to prevent the display quality from deteriorating. Further, since the chassis 30 is not colored, it is possible to reduce the number of assembly steps and the cost. The support pin 36 may be configured to be white as in the first embodiment.

  The light source device (3) according to the present invention includes a light source (31) disposed on a bottom plate (30a) of a box-shaped body (30) having an opening, and the box-shaped body (30 facing the bottom plate (30a)). ) And an optical member (34) that covers the opening of the box-like body (30), projects from the inner wall of the box-like body (30) toward the opening, and the optical member (34) is projected by the tip. And a supporting body (36) to be supported.

  According to the present invention, the support (36) is formed integrally with the box-shaped body (30), and the box-shaped body (30) and the support (36) can be handled as one part. It is possible to reduce the number of points, the assembly man-hours, and the cost.

  The light source device (3) according to the present invention is characterized in that the box-shaped body (30) and the support body (36) are integrated by insert molding or two-color molding.

  According to the present invention, the box-shaped body (30) and the support portion (36) can be integrally formed. Moreover, the box-shaped body (30) which has a support body (36) can be manufactured corresponding to various magnitude | sizes by arrange | positioning a support pin (36) suitably.

  The light source device (3) according to the present invention is characterized in that the support (36) is white or transparent.

  According to the present invention, it is possible to prevent the occurrence of shadows due to light from the light source (31) and to prevent the display quality from being deteriorated.

  The light source device (3) according to the present invention is characterized in that the box-shaped body (30) is white or transparent.

  According to the present invention, it is possible to prevent the occurrence of shadows due to light from the light source (31) and to prevent the display quality from being deteriorated. Further, when the box-shaped body (30) and the support body (36) are manufactured with the same white or transparent resin, the box-shaped body (30) is not colored, so that the number of assembling steps and the cost are reduced. Is possible.

  A display device (1) according to the present invention includes a display panel (2) and the above-described light source device (3) disposed on the opposite side of the display surface of the display panel (2).

  According to the present invention, by using the light source device (3) described above, the number of parts of the display device (1) can be reduced, the number of assembly steps can be reduced, and the cost can be reduced.

  A television receiver according to the present invention includes the display device (1) described above and a receiving unit (11) that receives a television broadcast, and is based on the television broadcast received by the receiving unit (11). The display device (1) displays an image.

  According to the present invention, by using the light source device (3) described above, the number of parts of the television receiver can be reduced, the number of assembly steps can be reduced, and the cost can be reduced.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

1 Display device 2 Liquid crystal panel (display panel)
3 Backlight device (light source device)
11 Tuner (receiver)
30 Chassis (Box)
31 LED (light source)
34 Optical member 36 Support pin (support)

Claims (6)

A light source disposed on a bottom plate of a box-shaped body having an opening;
An optical member that covers the opening of the box-like body facing the bottom plate;
A support pin that is integrally formed with the box-like body, protrudes from the inner wall of the box-like body toward the opening, and supports the optical member by a tip;
A flat plate portion provided in the middle of the axial direction of the support pin;
A reflective sheet covering the inside of the box-shaped body;
With
The support pin is exposed from the reflective sheet;
The light source device, wherein the reflection sheet is placed on the flat plate portion .   The light source device according to claim 1, wherein the support pin is provided with a large-diameter portion on a distal end side with respect to the flat plate portion. The light source device according to claim 1 or 2 , wherein the box-shaped body and the support pin are integrated by insert molding or two-color molding. The light source device according to claim 1, wherein the support pin is white or transparent. The light source device according to any one of claims 1 to 4, wherein the box-like body is white or transparent. A display panel;
A display device comprising: the light source device according to claim 1 disposed on the opposite side of the display surface of the display panel.

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