JP2013079992A - Display and television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display and a television receiver capable of suppressing a light leak into a display panel at a peripheral part of the display panel.SOLUTION: A light shielding sheet 41 covers a peripheral lower side part 21a of a back face 212 of a display panel 21 and space S from the peripheral lower side part 21a to a front end of an LED substrate 26. A light shielding protrusion part 34 blocks the range from an inner surface of a front frame part 311 to a peripheral lower side part of a front face 23a of a light guide plate 23. Thus, among light radiated from LEDs, 25, 25, ..., light having not been incident on the inside of the light guide plate 23 from a lower end surface 23b of the light guide plate 23, is not incident on the inside of the display panel 21 since it is shielded by the light shielding sheet 41 or the light shielding protrusion part 34.

Description

  The present invention relates to a display device in which a display panel is illuminated by light emitted from a light source, and a television receiver including the display device.

The liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight illuminates the liquid crystal display panel from the back side of the liquid crystal display panel.
An edge-light type backlight has a light guide plate disposed on the back side of a liquid crystal display panel via an optical sheet group, and LEDs are disposed opposite to one side end surface (for example, the lower end surface) of the light guide plate ( Patent Document 1).
Light emitted from the LED is guided to the back side of the liquid crystal display panel by the light guide plate, and enters the liquid crystal display panel through diffusion and condensing by the optical sheet group. As a result, the display surface of the liquid crystal display panel becomes uniformly bright.

A printed circuit board is disposed on one side (for example, the lower side) of the light guide plate. The printed circuit board and the liquid crystal display panel are connected by SOF (System On Film). The SOF is a film-like substrate, and a driver LSI for displaying an image on the display surface of the liquid crystal display panel is mounted on the SOF.
The liquid crystal display panel, the backlight, the printed circuit board, and the SOF are accommodated in a casing that uses a front cabinet and a rear cabinet.

Japanese Patent Laid-Open No. 2001-117097

When a phenomenon in which light emitted from the LED enters the liquid crystal display panel without passing through the optical sheet group (hereinafter referred to as light leakage) occurs, a part of the display surface becomes uselessly brighter than the other part. As a result, the image quality of the video displayed on the display surface is deteriorated.
The cause of light leakage is that the peripheral edge of the back surface of the liquid crystal display panel is not covered with the optical sheet group, and a space through which light can pass between the LED and the liquid crystal display panel (hereinafter referred to as light leakage space). Exist. Therefore, a part of the light emitted from the LED does not enter the inside of the light guide plate, passes through the light leakage space, and is reflected directly or by the inner surface of the front cabinet and the front surface of the light guide plate. Incident into the display panel.

The liquid crystal display device described in Patent Document 1 further includes a reflection plate that reflects light emitted from the LED toward the light guide plate, and a double-sided adhesive sheet-shaped light shielding member. The edge of the reflecting plate is fixed to the edge of the light guide plate by a light shielding member. The light reflector and the light shielding member close the light leakage space. For this reason, the light that has not entered the light guide plate is reflected by the reflecting plate, or reflected or absorbed by the light shielding member.
Another conventional liquid crystal display device further includes a panel chassis to which a liquid crystal display panel is attached, and covers the optical sheet group, the light guide plate, and the LEDs with the panel chassis. The panel chassis closes the light leakage space. For this reason, the light radiated | emitted from LED cannot enter into the inside of a liquid crystal display panel, unless it passes through the inside of a light-guide plate and an optical sheet group.

  Incidentally, in recent years, the number of parts has been reduced in order to reduce the thickness and frame size of display devices. When the number of reflectors or panel chassis is reduced, light leakage cannot be suppressed.

  The present invention has been made in view of such circumstances, and a main object thereof is a display device capable of suppressing light leakage to the display panel at the peripheral edge portion of the display panel while achieving thinning and narrowing of the frame. And a television receiver including the display device.

  A display device according to the present invention includes a display panel having a display surface on the front side, a light guide plate that is disposed on the back side of the display panel and emits light incident on the inside from one side end surface, and A display device comprising a light source disposed opposite to one end face, wherein the light-shielding sheet is provided to cover a peripheral portion on the light source side on the back surface of the display panel.

  The display device according to the present invention further includes a non-translucent substrate on which the light source is mounted, has a space between the substrate and a peripheral portion on the light source side, and the light shielding sheet includes the light shielding sheet, It is arranged so as to cover the space.

  The display device according to the present invention protrudes through the space from the cabinet to the side of the light guide plate and surrounds the peripheral portion of the display surface, and extends along the peripheral direction of the peripheral portion on the light source side. And a plurality of insertion holes corresponding to the plurality of light-shielding projections, the light-shielding sheet, The light-shielding convex portion is inserted into the insertion hole.

  In the display device according to the present invention, the light-shielding convex portion is provided with a concave portion that is recessed in a direction intersecting the projecting direction of the light-shielding convex portion, and is engaged with the concave portion at the opening edge of the insertion hole. An engaging portion is provided.

  The display device according to the present invention is characterized in that the light-shielding convex portion is provided integrally with the cabinet, and the concave portion is formed in a groove shape.

  The display device according to the present invention further includes a heat dissipating member attached to the substrate and an insulating sheet bonded to the heat dissipating member to release the heat generated by the light source to the outside, and the light shielding sheet Is integrally provided on the insulating sheet.

  A television receiver according to the present invention includes the display device according to the present invention and a receiving unit that receives a television signal, and the display device displays an image based on the television signal received by the receiving unit. It is characterized by that.

In the present invention, the display device includes a display panel, a light source, a light guide plate, and a light shielding sheet.
The light source is disposed to face one end face of the light guide plate. For this reason, a part of the light emitted from the light source enters the inside of the light guide plate from one side end face of the light guide plate, and is emitted from the front surface of the light guide plate to be guided to the back side of the display panel.
Even if another part of the light emitted from the light source attempts to enter the display panel without passing through the inside of the light guide plate, it is shielded by the light shielding sheet. Therefore, light leakage is suppressed.

This is because the light shielding sheet covers the light source side peripheral portion (hereinafter referred to as the light source side peripheral portion) among the peripheral portions on the back surface of the display panel. The light source side peripheral portion on the back surface of the display panel is a portion where light leaks most strongly when light enters the display panel from here.
In addition, when not only the light source side peripheral part on the back surface of the display panel but also the peripheral part other than the light source side peripheral part is covered with the light shielding sheet, for example, light leakage due to light emitted from an end face other than one side end face of the light guide plate is prevented. It is possible to suppress.

In the present invention, the display device further includes a non-translucent substrate.
Since the substrate is non-light-transmitting, there is no possibility that light transmitted through the substrate enters the display panel. The light shielding sheet covers not only the light source side peripheral portion on the back surface of the display panel but also a space between the light source side peripheral portion and the substrate. This space becomes a light leakage space when there is no light shielding sheet. That is, the light shielding sheet and the substrate cover the light leakage space between the light source and the display panel.

If the light shielding sheet covers only the light source side peripheral edge of the back of the display panel, useless light may enter the display panel from the light source side peripheral edge of the display panel, for example. I can't deny it.
From the above, the display device according to the present invention can more reliably suppress light leakage.

In the present invention, the display device further includes a cabinet and a plurality of light shielding protrusions.
This cabinet is, for example, a front cabinet, and surrounds at least the peripheral portion of the display surface of the display panel.
Each light shielding convex part protrudes from the cabinet to the light guide plate side. Each light-shielding convex portion penetrates a space between the light source side peripheral portion and the substrate, that is, a space that can be a light leakage space. Therefore, light leakage is suppressed because the light leakage space is closed at the portion where each light shielding convex portion is provided.
The plurality of light shielding convex portions are arranged in parallel along the peripheral direction of the light source side peripheral portion. For this reason, it is possible to arrange other members (for example, SOF) between the light-shielding convex portions.

A corresponding light-shielding convex portion is inserted into each insertion hole provided in the light-shielding sheet.
Therefore, for example, when the manufacturer of the display device attaches the light shielding sheet at a predetermined position, the light shielding sheet can be easily positioned by inserting the light shielding convex portion of the cabinet into the insertion hole of the light shielding sheet. Further, since the light shielding sheet is supported by the light shielding convex portions, it is not necessary to adhere the light shielding sheet to the display panel, for example. As a result, the light-shielding sheet is easily attached at low cost. In addition, since it is not necessary to form an adhesive layer for adhering the light shielding sheet to, for example, the display panel on the surface of the light shielding sheet, the light shielding sheet can be thinned.

Since each insertion hole of the light shielding sheet is closed by the light shielding convex portion, each insertion hole does not function as a light leakage space.
Since the space between the light-shielding convex portions is closed by the light-shielding sheet, the space between the light-shielding convex portions does not function as a light leakage space.

In the present invention, the light shielding convex portion is provided with a concave portion, and the engaging portion is provided at the opening edge portion of each insertion hole.
If there is no concave portion or engaging portion, the light shielding convex portion of the cabinet is simply inserted into the insertion hole of the light shielding sheet. For this reason, for example, when the display device is manufactured or maintenance / inspected, an external force such as a wind blows or an operator's hand comes into contact with the light-shielding sheet may be displaced or dropped. .
However, if the light-shielding convex part of the cabinet is inserted into the insertion hole of the light-shielding sheet and the engaging part engages with the concave part, the light-shielding sheet is positioned when the light-shielding sheet is attached, and the attached light-shielding sheet Is prevented from dropping unnecessarily.

  In the present invention, the concave portion provided in the light-shielding convex portion has a groove shape. For this reason, when forming the cabinet which has the light-shielding convex part by extrusion molding, for example, the groove-shaped recessed part which the longitudinal direction follows in the direction which extrudes the metal or synthetic resin etc. which are the raw materials of a cabinet from a metal mold | die is formed. be able to. As a result, the display device can be easily manufactured as compared with the case where the concave portion is added to the light shielding convex portion after the cabinet having the light shielding convex portion not provided with the concave portion is formed.

In the present invention, the display device further includes a heat dissipation member and an insulating sheet.
The heat radiating member is attached to the substrate on which the light source is mounted. The heat radiating member emits heat generated by the light source and conducted through the substrate to the outside.
Generally, the heat dissipation member is made of metal. For this reason, the insulating sheet is bonded to the heat radiating member so that an electrical short circuit does not occur when the heat radiating member contacts an electric component (for example, a printed circuit board connected to the SOF) included in the display device.
Even if the heat dissipating member and / or the insulating sheet have translucency, the light transmitted through the heat dissipating member and / or the insulating sheet may enter the inside of the display panel because the substrate is not translucent. There is no.

  The light shielding sheet is provided integrally with the insulating sheet. Therefore, it is not necessary to adhere the light shielding sheet to the display panel, for example. Further, if the insulating sheet is accurately positioned with respect to the heat radiating member and the heat radiating member is accurately attached at a predetermined position, positioning and attachment of the light shielding sheet itself can be eliminated. Further, as a result of the above, the work for attaching the light shielding sheet is simple and low cost. In addition, since it is not necessary to form an adhesive layer for adhering the light shielding sheet to, for example, the display panel on the surface of the light shielding sheet, the light shielding sheet can be thinned.

In the present invention, a television receiver includes the display device and the receiving unit according to the present invention.
In the display device according to the present invention, light leakage is suppressed. Therefore, when displaying an image based on the television signal received by the receiving unit, there is no possibility that the image quality of the displayed image is deteriorated due to light leakage.

In the case of the display device and the television receiver of the present invention, light leakage can be suppressed even in a configuration that does not include a reflector and a light shielding member, a panel chassis, or the like as provided in a conventional liquid crystal display device. it can. This is because the light-shielding sheet that covers the light source side peripheral portion on the back surface of the display panel shields unnecessary light entering the display panel.
The light-shielding sheet can be configured as a lighter, smaller, or thinner member than conventional reflectors and light-shielding members, or panel chassis, etc., thus obstructing the thinning and narrowing of the display device and television receiver Never do.

It is a perspective view which shows the external appearance of the television receiver which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the protrusion protrusion position which shows typically the structure of the display apparatus which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the convex part non-projecting position which shows typically the structure of the display apparatus which concerns on Embodiment 1 of this invention. It is an expanded rear view which shows the structure of a part of front cabinet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is an expansion perspective view which shows the structure of a part of front cabinet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is an expansion perspective view which shows the state which attached the panel unit to the front cabinet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is an enlarged back view for demonstrating attachment of the light shielding sheet with respect to the front cabinet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is an expansion perspective view for demonstrating attachment of the light shielding sheet with respect to the front cabinet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is an enlarged rear view which shows the state which attached the light shielding sheet to the front cabinet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is an expansion perspective view which shows the state which attached the light shielding sheet to the front cabinet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is an expansion perspective view for demonstrating attachment of the LED unit with respect to the front cabinet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is an expansion perspective view which shows the state which attached the LED unit to the front cabinet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is a longitudinal cross-sectional view of the protrusion protrusion position for demonstrating the effect of the light shielding sheet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is a longitudinal cross-sectional view of the convex part non-projecting position for demonstrating the effect of the light shielding sheet with which the display apparatus which concerns on Embodiment 1 of this invention is provided. It is an expansion perspective view which shows the structure of a part of front cabinet with which the display apparatus which concerns on Embodiment 2 of this invention is provided. It is an expansion perspective view which shows the structure of a part of light-shielding convex part with which the display apparatus which concerns on Embodiment 2 of this invention is provided. It is a rear view which shows the structure of the light shielding sheet with which the display apparatus which concerns on Embodiment 2 of this invention is provided. It is an expanded rear view which shows the structure of a part of light-shielding sheet with which the display apparatus which concerns on Embodiment 2 of this invention is provided. It is an expanded rear view which shows the structure of the insertion hole of the light shielding sheet with which the display apparatus which concerns on Embodiment 2 of this invention is provided. It is an expanded rear view which shows the structure of the other insertion hole of the light shielding sheet with which the display apparatus which concerns on Embodiment 2 of this invention is provided. It is a longitudinal cross-sectional view of the protrusion protruding position schematically showing the configuration of the display device according to Embodiment 3 of the present invention. It is a longitudinal cross-sectional view of the protrusion part non-projecting position which shows typically the structure of the display apparatus which concerns on Embodiment 3 of this invention. It is an expanded rear view which shows the structure of a part of front cabinet with which the display apparatus which concerns on Embodiment 3 of this invention is provided. It is an expansion perspective view which shows the structure of a part of front cabinet with which the display apparatus which concerns on Embodiment 3 of this invention is provided. It is an expanded rear view which shows the state which attached the panel unit to the front cabinet with which the display apparatus which concerns on Embodiment 3 of this invention is provided. It is an expansion perspective view which shows the state which attached the panel unit to the front cabinet with which the display apparatus which concerns on Embodiment 3 of this invention is provided. It is an expansion perspective view for demonstrating attachment of the sheet | seat member with respect to the heat sink with which the display apparatus which concerns on Embodiment 3 of this invention is provided. It is an expansion perspective view which shows the state which attached the sheet | seat member to the heat sink with which the display apparatus which concerns on Embodiment 3 of this invention is provided. It is an expansion perspective view for demonstrating attachment of the LED light-shielding unit with respect to the front cabinet with which the display apparatus which concerns on Embodiment 3 of this invention is provided. It is an expanded rear view which shows the state which attached the LED light-shielding unit to the front cabinet with which the display apparatus which concerns on Embodiment 3 of this invention is provided. It is an expansion perspective view which shows the state which attached the LED light-shielding unit to the front cabinet with which the display apparatus which concerns on Embodiment 3 of this invention is provided.

  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 showing an external appearance of a television receiver 1 according to Embodiment 1 of the present invention.
2 and 3 are longitudinal sectional views schematically showing the configuration of the display device 10 according to Embodiment 1 of the present invention. However, FIG. 2 shows a cross section at a position where a light-shielding convex portion 34 and a positioning convex portion 423, which will be described later, are projected (that is, a convex portion projecting position), and FIG. 3 shows the light-shielding convex portion 34 and the positioning convex portion. 423 shows a cross section at a position where no protrusion 423 is provided (that is, a protrusion non-projecting position). 2 and 3, illustration of a receiving unit 11, a signal processing unit 12, a rear cabinet 32, and the like, which will be described later, is omitted. The arrows shown in FIGS. 2 and 3 indicate the direction of light.

Hereinafter, the left side and the right side of FIGS. 2 and 3 are referred to as a front side and a rear side, or a front side and a back side of the display device 10 (and thus the television receiver 1). 2 and 3 are the left and right directions of the display device 10. Hereinafter, the near side and the far side in the direction perpendicular to the plane of FIG. 2 and FIG. 3 are referred to as the left side and the right side of the display device 10.
4 and 5 are an enlarged rear view and an enlarged perspective view showing a configuration of a part of the front cabinet 31 (described later). Specifically, FIG. 4 and FIG. 5 show the lower left corner of the front cabinet 31.
FIG. 6 is an enlarged perspective view showing a state in which a panel unit (described later) is attached to the front cabinet 31. FIG. 6 shows a state in which the panel unit is attached to the front cabinet 31 shown in FIG.

7 and 8 are an enlarged rear view and an enlarged perspective view for explaining attachment of a light shielding sheet 41 (described later) to the front cabinet 31. FIG. FIG. 7 shows a state in which the panel unit is attached to the front cabinet 31 shown in FIG. 4 and the light shielding sheet 41 is attached thereto. FIG. 8 shows a state where the light shielding sheet 41 is attached to the front cabinet 31 shown in FIG.
9 and 10 are an enlarged rear view and an enlarged perspective view showing a state in which the light shielding sheet 41 is attached to the front cabinet 31. FIG. 9 and 10 show a state in which the light shielding sheet 41 is attached to the front cabinet 31 shown in FIGS. 7 and 8.

FIG. 11 is an enlarged perspective view for explaining attachment of an LED unit (described later) to the front cabinet 31. FIG. 11 shows the front cabinet 31 (see FIG. 6) to which the panel unit is attached and the LED unit.
FIG. 12 is an enlarged perspective view showing a state in which the LED unit is attached to the front cabinet 31. FIG. 12 shows a state where the light shielding sheet 41 and the LED unit are attached to the front cabinet 31 shown in FIG.

First, the configuration of the television receiver 1 will be described with reference to FIG.
The television receiver 1 includes a display device 10, a reception unit 11, a signal processing unit 12, and a stand 13.
The display device 10 includes a rectangular display panel 21 and a housing 100. The front part (and the rear part) of the housing 100 is formed by using a rectangular frame-shaped front cabinet 31 (and a rectangular tray-shaped rear cabinet 32).
The receiving unit 11 and the signal processing unit 12 are built in the housing 100. The receiving unit 11 and the signal processing unit 12 may be externally attached to the display device 10.

The display device 10 displays an image based on the television signal received by the receiving unit 11. For this purpose, the receiving unit 11 receives a television signal from the outside via an antenna (not shown), and the signal processing unit 12 performs predetermined signal processing on the television signal received by the receiving unit 11. Output video data.
The display panel 21 has a display surface 211 on the front side. The display panel 21 displays a video based on the video data output from the signal processing unit 12 on the display surface 211.
The stand 13 is provided below the display device 10 and supports the display device 10 in a vertical posture.

The front cabinet 31 is formed by extrusion using aluminum and has a rectangular opening 31a at the center thereof.
The rear cabinet 32 is made of, for example, an electrogalvanized steel sheet.
The front cabinet 31 and the rear cabinet 32 have substantially the same vertical and horizontal dimensions, and their peripheral portions face each other.

The display panel 21 is a liquid crystal display panel. The display panel 21 is housed in the casing 100 in a vertical posture so that an effective display area located at the center of the display surface 211 is exposed from the opening 31a. The vertical and horizontal dimensions (that is, the vertical and horizontal directions) of the display panel 21 are slightly larger than the vertical and horizontal dimensions of the opening 31a. Therefore, the front cabinet 31 surrounds the periphery of the display surface 211 of the display panel 21.
The front cabinet 31 functions as a cabinet in the embodiment of the present invention.

Next, the configuration of the display device 10 will be described in detail. Below, the structure of the vicinity of a lower side part (henceforth a peripheral lower side part) among the peripheral parts of the front cabinet 31 is mainly demonstrated.
First, the configuration of the front cabinet 31 will be further described with reference to FIGS.
The front cabinet 31 includes a front frame portion 311 and a protruding frame portion 312.
The front frame portion 311 has a rectangular plate shape with an opening 31a formed at the center, and the front surface of the front frame portion 311 is exposed (that is, the outer surface).

  An elastic member 33 for suppressing damage to the display panel 21 is provided at the opening edge portion of the opening 31a (that is, the inner edge portion of the front frame portion 311) on the rear surface of the front frame portion 311 (that is, the inner surface of the front frame portion 311). It arrange | positions continuously or intermittently along the peripheral direction of the front frame part 311. FIG. However, illustration of the elastic member 33 in FIGS. 4 and 5 is omitted.

A plurality of light-shielding convex portions 34, 34,... Arranged in parallel in the peripheral direction (specifically, the left-right direction) of the lower peripheral edge of the front frame portion 311 at the center portion in the vertical direction of the inner surface of the front frame portion 311. The positioning groove 35 has a longitudinal direction along the left-right direction. The light shielding convex portions 34, 34,... Are positioned below the elastic member 33 (in other words, the outer edge side of the front frame portion 311 with respect to the elastic member 33), and the positioning groove 35 includes the light shielding convex portions 34, 34,. It is located further down than ....
The positioning groove 35 is used for positioning a heat sink 42 described later.

Each light-shielding convex part 34 protrudes through the space S mentioned later from the inner surface of the front frame part 311 to the back direction, ie, the light guide plate 23 side mentioned later from the front cabinet 31. The cross-sectional shape of each light-shielding convex portion 34 is a rectangular shape.
The protruding frame portion 312 protrudes rearward from the outer edge portion of the front frame portion 311.
Here, manufacture of the front cabinet 31 is demonstrated. First, the front frame portion 311, the protruding frame portion 312, the projecting ridge portions to be the light shielding convex portions 34, 34,... And the positioning groove 35 are integrally formed by extrusion molding. Next, the light-projecting convex portions 34, 34,... Are formed by partially cutting the formed convex strip portions and dividing the resulting strip into a plurality of portions. As a result, the front cabinet 31 is manufactured.

  Next, the configuration of the panel unit will be described with reference to FIG. 2, FIG. 3, and FIG. Here, a group of the display panel 21, the optical sheet group 22, the SOFs 27, 27,... And the printed boards 28, 28,.

  The display panel 21 is illuminated from the back surface 212 side of the display panel 21 by an edge light type backlight described later. The display panel 21 includes a glass plate on the display surface 211 side and a glass plate on the back surface 212 side. Liquid crystal is disposed between the two glass plates, and the transmittance of the display panel 21 changes according to the voltage applied to the liquid crystal. Therefore, the light from the backlight is transmitted through the display panel 21 or blocked from passing through the display panel 21. As a result, an image is displayed on the display surface 211.

  The backlight is configured using an optical sheet group 22, a light guide plate 23, a reflective sheet 24, LEDs 25, 25,. The optical sheet group 22 will be described next, and the others will be described later.

The optical sheet group 22 is disposed in close contact with the center of the back surface 212 of the display panel 21. The vertical and horizontal dimensions of the optical sheet group 22 are smaller than the vertical and horizontal dimensions of the back surface 212 of the display panel 21. For this reason, the optical sheet group 22 does not cover the peripheral edge of the display panel 21. However, the vertical and horizontal dimensions of the optical sheet group 22 are larger than the vertical and horizontal dimensions of the effective display area of the display panel 21. That is, the optical sheet group 22 covers the effective display area of the display panel 21 from the back surface 212 side.
The optical sheet group 22 is formed by laminating a plurality of optical sheets such as an optical sheet having a light diffusion function and an optical sheet having a light collecting function.
Instead of the optical sheet group 22, a single optical sheet having a plurality of types of functions such as a light diffusing function and a light collecting function may be disposed in close contact with the display panel 21.

The plurality of SOFs 27, 27,... Are juxtaposed along the peripheral direction (specifically, the left-right direction) of the peripheral lower side portion 21a of the display panel 21. Each SOF 27 has an upper end connected to the display panel 21 and hangs down from the lower peripheral edge 21a.
The lower end of each SOF 27 is bent rearward and connected to any one of the plurality of printed boards 28, 28,. A driver LSI 271 is mounted on the back surface of each SOF 27. The driver LSI 271 applies an appropriate voltage to the liquid crystal of the display panel 21 based on the video data output from the signal processing unit 12. As a result, the transmittance of the display panel 21 changes. However, illustration of the driver LSI 271 in FIGS. 2 and 3 is omitted.
Each printed circuit board 28 has a horizontally long rectangular plate shape.

The panel unit is attached to the front cabinet 31 from the rear so that the peripheral edge of the display surface 211 of the display panel 21 is in contact with the elastic member 33.
At this time, the peripheral direction of the peripheral lower side portion 21 a of the display panel 21 is along the peripheral direction of the peripheral lower side portion of the front frame portion 311, and these are both left and right directions. At this time, the SOFs 27, 27,... Are disposed between the light-shielding convex portions 34, 34,. That is, the SOF 27 and the light shielding convex portion 34 are alternately arranged in the left-right direction. Each printed circuit board 28 is arranged in a horizontal posture along the left-right direction so that the lower surface thereof faces the upper surface (ie, the inner surface) of the protruding frame portion 312. At this time, the plurality of printed circuit boards 28, 28,... Are juxtaposed in the left-right direction.

Next, the configuration of the light shielding sheet 41 will be described with reference to FIGS. 2, 3, and 7 to 10.
The light shielding sheet 41 is in the form of a horizontally long rectangular sheet, and is made of polycarbonate. The light shielding sheet 41 is not limited to a configuration using polycarbonate, and may be made of paper, for example.
Although the color of the light shielding sheet 41 is black, the color is not limited to black as long as it is a color that is difficult to transmit light.

The light shielding sheet 41 covers the lower peripheral edge 21a of the back surface 212 of the display panel 21 and the space S from the lower peripheral edge 21a to the front end of the LED substrate 26 described later. The peripheral lower side portion 21a functions as a peripheral portion on the light source side in the embodiment of the present invention.
Here, the peripheral lower side portion 21a of the back surface 212 of the display panel 21 is a peripheral portion of the back surface 212 on the LED 25, 25,. The peripheral direction of the peripheral lower side portion 21a is along the left-right direction. That is, the light shielding convex portions 34, 34,... Are arranged in parallel along the peripheral direction of the peripheral lower side portion 21a.

It is desirable that the light shielding sheet 41 covers as much as possible the portion where the back surface 212 is exposed (that is, the portion not covered by the optical sheet group 22) in the lower peripheral edge 21a of the back surface 212 of the display panel 21. Therefore, it is desirable that the upper end portion of the light shielding sheet 41 is disposed as close as possible to the lower end portion of the optical sheet group 22.
In the light shielding sheet 41, a plurality of rectangular insertion holes 411, 411,... Are juxtaposed in the longitudinal direction of the light shielding sheet 41. The opening positions of the insertion holes 411, 411,... Correspond to the protruding positions of the light shielding convex portions 34, 34,.

  The light shielding sheet 41 is attached to the front cabinet 31 from the rear in a vertical posture. More specifically, the light shielding sheet 41 is supported by the light shielding convex portions 34, 34,... By inserting the light shielding convex portions 34, 34,. At this time, the upper end portion of the front surface of the light shielding sheet 41 is in contact with the lower peripheral edge portion 21 a of the rear surface 212 of the display panel 21.

  Here, the vertical and horizontal dimensions of each insertion hole 411 are slightly longer than the vertical and horizontal dimensions of the corresponding light-shielding protrusions 34. If the vertical and horizontal dimensions of the insertion hole 411 are equal to or smaller than the vertical and horizontal dimensions of the insertion hole 411, the light shielding convex part 34 cannot be inserted into the insertion hole 411, or the light shielding convex part 34 is forcibly inserted into the insertion hole 411. As a result, the light shielding sheet 41 may be distorted or damaged. On the contrary, when the vertical and horizontal dimensions of the insertion hole 411 are excessively longer than the vertical and horizontal dimensions of the insertion hole 411, there is a possibility that light leakage as will be described later occurs through the insertion hole 411.

Next, the configuration of the LED unit will be described with reference to FIGS. 2, 3, 11, and 12. Here, a group of the LEDs 25, 25,..., The LED substrate 26, the heat sink 42, and the insulating sheet 43 is referred to as an LED unit.
The LED substrate 26 is non-translucent and has a horizontally long rectangular plate shape. A plurality of LEDs 25, 25,... Juxtaposed in the longitudinal direction of the LED substrate 26 are mounted on one surface of the LED substrate 26.
The LEDs 25, 25,... And the LED substrate 26 function as a light source and a substrate in the embodiment of the present invention. In addition, it replaces with LED25, 25, ..., a light bulb, a hot cathode fluorescent lamp, EL (Electro Luminescence), or a cold cathode tube etc. may be provided.

The insulating sheet 43 is a horizontally long rectangular sheet and is made of polycarbonate.
The heat sink 42 is made of metal and has a horizontally long bar shape and an inverted L-shaped vertical cross-sectional shape. The heat sink 42 is a rectangular plate-like substrate mounting portion 421 arranged on one side in a horizontal posture, and a rectangular plate-like housing mounting portion 422 arranged on a vertical side in the other side. The heat sink 42 may be made of synthetic resin.
The LED substrate 26 is fixedly mounted on the substrate mounting portion 421. At this time, the outer surface of the substrate mounting portion 421 and the other surface of the LED substrate 26 (that is, the surface where the LEDs 25, 25,... Are not mounted) are in contact, and further, the substrate mounting portion 421 and the LED substrate 26, respectively. The longitudinal directions of these are along each other.

An insulating sheet 43 is bonded to the inner surface of the substrate mounting portion 421 via an adhesive layer made of double-sided adhesive tape or adhesive. At this time, the longitudinal directions of the substrate mounting portion 421 and the insulating sheet 43 are along each other.
A plurality of positioning projections 423, 423,... Juxtaposed in the longitudinal direction of the heat sink 42 are projected from the front end of the substrate platform 421. The protruding length of each positioning convex portion 423 from the front end portion of the substrate mounting portion 421 is appropriately longer than the depth of the positioning groove 35 (that is, the length in the front-rear direction). In addition, the thickness (that is, the length in the vertical direction) of each positioning protrusion 423 is slightly shorter than the opening width (that is, the length in the vertical direction) of the positioning groove 35.

In the LED unit, the outer surface of the substrate mounting portion 421, that is, the surface on which the LED substrate 26 is mounted is directed upward, and the inner surface of the substrate mounting portion 421, that is, the surface to which the insulating sheet 43 is bonded is directed downward. , And further, it is attached to the front cabinet 31 from the rear with the positioning convex portions 423, 423,.
At this time, the positioning convex portions 423, 423,... Are arranged between the SOFs 27, 27,. That is, the positioning protrusions 423 and the SOF 27 are alternately arranged in the left-right direction. As a result, the arrangement in the left-right direction of each positioning protrusion 423 and the arrangement in the left-right direction of each light-shielding protrusion 34 are the same.

  Further, at this time, the positioning convex portions 423, 423,... Of the heat sink 42 are inserted into the positioning grooves 35 so that the tip end portions of the positioning convex portions 423 are in contact with the innermost portion of the positioning groove 35 of the front frame portion 311. Is done. As a result, the heat sink 42 is easily positioned in the vertical direction and the front-back direction.

  When the heat sink 42 is accurately positioned, the LEDs 25, 25,... Are accurately opposed to the lower end surface 23b of the light guide plate 23 described later. Further, the front end portion of the LED substrate 26 is in contact with the lower end portion of the rear surface of the light shielding sheet 41. Further, the insulating sheet 43 is interposed between the heat sink 42 and the printed boards 28, 28,.

If the insulating sheet 43 is not present, for example, an external force may be applied to the display device 10 to vibrate the printed circuit board 28 and contact with the heat sink 42 to cause a short circuit. However, since the insulating sheet 43 electrically insulates the printed circuit board 28 and the heat sink 42, occurrence of a short circuit is suppressed.
The positioned heat sink 42 is screwed to the front cabinet 31 as described later.
In the present embodiment, a configuration in which the display device 10 includes one light shielding sheet 41 is described. However, for example, as shown in FIG. 12, the display device 10 may be configured to include a plurality of light shielding sheets 41, 41,.

Next, the configuration of the backlight will be described with reference to FIGS.
The light guide plate 23 has a rectangular plate shape, and is made of, for example, acrylic resin. The vertical and horizontal dimensions of the light guide plate 23 are larger than the vertical and horizontal dimensions of the display panel 21.
The light guide plate 23 uniformly emits light that has entered the light guide plate 23 from at least the lower end surface 23b of the light guide plate 23 from the front surface 23a and the rear surface of the light guide plate 23 (that is, emits light).
The lower end surface 23b functions as one side end surface in the embodiment of the present invention.

  The reflection sheet 24 is disposed in close contact with the back surface of the light guide plate 23. The vertical and horizontal dimensions of the reflection sheet 24 are larger than the vertical and horizontal dimensions of the light guide plate 23. For this reason, the light emitted from the back surface of the light guide plate 23 is reliably reflected by the reflection sheet 24 and enters the light guide plate 23 again.

  The light emitted from the LEDs 25, 25,... Is incident on the inside of the light guide plate 23 from the lower end surface 23 b of the light guide plate 23 directly or by being reflected by the reflection sheet 24, the light shielding convex portion 34, or the like. The light incident on the inside of the light guide plate 23 is emitted from the front surface 23 a of the light guide plate 23. The light emitted from the front surface 23 a is incident on the inside of the display panel 21 from the back surface 212 of the display panel 21 after being diffused and condensed by the optical sheet group 22. As a result, the display surface 211 of the display panel 21 is uniformly brightened.

  The backlight chassis 36 includes a support part 361 and an attachment part 362. The support part 361 has a rectangular plate shape. The light guide plate 23 and the reflection sheet 24 are attached to the support portion 361 such that one surface of the support portion 361 and the back surface of the reflection sheet 24 are brought into close contact with each other.

In the backlight chassis 36, the center portion of the front surface 23a of the light guide plate 23 is in close contact with the back surface of the optical sheet group 22, and the lower peripheral edge portion of the front surface 23a of the light guide plate 23 is in close contact with the front end surfaces of the light shielding convex portions 34, 34,. As described above, the light guide plate 23 and the reflection sheet 24 are attached to the front cabinet 31 from the rear while being held in a vertical posture. At this time, the mounting portion 362 of the backlight chassis 36 is fastened together with the front cabinet 31 using screws B, B,... Together with the housing mounting portion 422 of the heat sink 42. As a result, the light guide plate 23 and the reflection sheet 24 are sandwiched between the light shielding convex portions 34, 34,... And the backlight chassis 36.
The back of the backlight chassis 36 is covered by the rear cabinet 32.

Next, the function and effect of the light shielding sheet 41 will be described.
FIGS. 13 and 14 are longitudinal sectional views of the protruding portion projecting position and the protruding portion non-projecting position for explaining the function and effect of the light shielding sheet 41. FIGS. 13 and 14 correspond to FIGS. 2 and 3, and the configuration of the display device 10 shown in FIGS. 13 and 14 is the display device shown in FIGS. 2 and 3 except that the light shielding sheet 41 is not provided. The configuration is the same as that of FIG.

  Regardless of the presence or absence of the light shielding sheet 41, as shown in FIGS. 2 and 13, the light leakage space in which light can pass from the LEDs 25, 25,... Does not exist. This is because the light-shielding convex portions 34, 34,... Project from the inner surface of the front frame portion 311 of the front cabinet 31 through the space S to the lower peripheral edge of the front surface 23 a of the light guide plate 23. This is because the range from the inner surface to the lower peripheral edge of the front surface 23a is closed. Therefore, the light emitted from the LEDs 25, 25,... Is incident on the inside of the light guide plate 23 from the lower end surface 23b of the light guide plate 23, either directly or by being reflected by the reflection sheet 24, the light shielding convex portion 34, or the like. To do. For this reason, light leakage does not occur.

  However, as shown in FIG. 14, when the display device 10 does not include the light shielding sheet 41, a light leakage space exists at a non-projecting position of each light shielding convex portion 34. Therefore, of the light radiated from the LEDs 25, 25,..., The light that has not entered the light guide plate 23 is reflected by the back surface of the SOF 27, the front surface 23a of the light guide plate 23, and the like. The light is incident on the inside of the display panel 21 from the lower peripheral edge portion 21a of 212, that is, the portion of the back surface 212 not covered by the optical sheet group 22. As a result, the portion corresponding to the non-projecting position of the light-shielding convex portions 34, 34,... At the lower portion of the display surface 211 becomes uselessly brighter than the other portions as if only this portion was separately illuminated by the searchlight. . As a result, the image quality of the video displayed on the display surface 211 deteriorates.

On the other hand, as shown in FIG. 3, when the display device 10 includes the light shielding sheet 41, no light leakage space exists at the projecting position of each light shielding convex portion 34. This is because the light shielding sheet 41 covers the space S from the lower peripheral edge 21 a of the display panel 21 to the front end of the LED substrate 26. Therefore, the light emitted from the LEDs 25, 25,... That has not entered the light guide plate 23 is shielded by the light shielding sheet 41, and therefore does not enter the display panel 21.
Even if the light shielding sheet 41 does not cover the space S, the light shielding sheet 41 covers the lower peripheral edge 21a of the back surface 212 of the display panel 21 and is not covered by the optical sheet group 22 on the back surface 212. There is no possibility that unnecessary light may enter the display panel 21 from the portion.

In the display device 10 as described above, since light leakage is suppressed, the image quality of the video displayed on the display surface 211 is improved. Moreover, since it is not necessary to adhere the light shielding sheet 41 to another member (for example, the display panel 21), the light shielding sheet 41 is thin because an adhesive layer such as a double-sided adhesive tape or an adhesive is not required.
In the case where the light shielding sheet 41 does not cover the space S, the light shielding sheet 41 needs to be bonded to the lower peripheral edge 21a of the back surface 212 of the display panel 21, and when the light shielding sheet 41 is bonded, Positioning is required. Further, although light leakage through the lower end surface of the display panel 21 is unlikely to occur, it is desirable to cover the lower end surface of the display panel 21 with a separate light shielding sheet just in case.

  Further, the light shielding sheet 41 may be provided in the vicinity of the upper edge of the front cabinet 31. This is because the LEDs 25, 25,... And the LED board 26 may be arranged near the upper edge of the front cabinet 31. At this time, the light shielding sheet 41 covers the upper peripheral edge of the back surface 212 of the display panel 21, but it is also preferable to cover the space from the upper peripheral edge to the front end of the LED substrate 26 in the vicinity of the upper peripheral edge. In addition, it is desirable that light-shielding convex portions 34, 34,. .

  Furthermore, the light shielding sheet 41 may be provided in the vicinity of the peripheral left side and the peripheral right side of the front cabinet 31. This is because even if the LEDs 25, 25,... And the LED substrate 26 are not arranged near the left and right edges of the front cabinet 31, for example, the light is emitted from an end surface other than the lower end surface 23 b of the light guide plate 23. This is because light leakage may occur due to the reflected light being reflected inside the front cabinet 31. At this time, the light shielding sheets 41 and 41 may cover the peripheral left side and the peripheral right side of the back surface 212 of the display panel 21. However, even in this case, the light-shielding convex portions 34, 34,. It is desirable to be supported by.

Embodiment 2. FIG.
The configuration of the display device 10 and the television receiver 1 in the present embodiment is the same as the configuration of the display device 10 and the television receiver 1 in the first embodiment, except for the configuration of each light-shielding projection 34 and the configuration of the light-shielding sheet 41. Are the same. Hereinafter, differences between the first and second embodiments will be described, and other parts corresponding to those of the first embodiment are denoted by the same reference numerals and description thereof will be omitted.

FIG. 15 is an enlarged perspective view showing a configuration of a part of the front cabinet 31 included in the display device 10 according to Embodiment 2 of the present invention. FIG. 16 is an enlarged perspective view showing a configuration of a part of the light-shielding convex portion 34 included in the display device 10, and an area A shown in FIG. 15 is enlarged. 15 and 16 is the front-rear direction of the display device 10.
Each light-shielding convex part 34 is provided with groove-shaped concave parts 341 and 342 whose longitudinal direction extends in the left-right direction on the upper and lower surfaces of the light-shielding convex part 34. The groove-shaped recess 341 is recessed downward, and the groove-shaped recess 342 is recessed upward. Accordingly, the groove-shaped concave portions 341 and 342 are recessed in a direction intersecting the projecting direction of the light shielding convex portion 34. The groove-shaped concave portions 341 and 342 function as concave portions in the embodiment of the present invention.

Here, manufacture of the front cabinet 31 is demonstrated. First, the front frame portion 311, the protruding frame portion 312, the light shielding convex portions 34, 34,... Are integrally formed. Next, the formed grooved ridges are partially cut and divided into a plurality of parts, thereby forming light-shielding protrusions 34, 34,... Provided with groove ridges 341, 342, respectively. As a result, the front cabinet 31 is manufactured.
Except that the groove-shaped concave portions 341 and 342 are provided, the size of each light-shielding convex portion 34 in the present embodiment is the same as the size of each light-shielding convex portion 34 in the first embodiment.

FIG. 17 is a rear view illustrating the configuration of the light shielding sheet 41 included in the display device 10.
FIG. 18 is an enlarged rear view showing a configuration of a part of the light shielding sheet 41.
FIG. 19 is an enlarged rear view showing the configuration of the insertion hole 412 of the light shielding sheet 41.
The structure of the light shielding sheet 41 of the present embodiment is the same as that of the first embodiment except that the insertion holes 412, 412,... Are provided instead of the insertion holes 411, 411,. The configuration is the same as that of the sheet 41.

Of the opening edge portions of each insertion hole 412, two long side portions (that is, the upper side portion and the lower side portion) are respectively provided with triangular claw-like engaging portions 41a, 41a, 41b, which protrude along the short side direction. 41b is provided. The engaging portions 41 a and 41 b are provided integrally with the light shielding sheet 41. The two engaging portions 41a and 41a arranged on the upper side portion of the insertion hole 412 and the two engaging portions 41b and 41b arranged on the lower side portion are arranged to face each other in the vertical direction.
Except that four engaging portions 41a, 41a, 41b, and 41b are provided, the dimensions and positions of the insertion holes 412 in this embodiment are the same as the dimensions of the insertion holes 411 in the first embodiment. And the same as the formation position.

Accordingly, the opening length B1 in the short side direction of the insertion hole 412 is slightly longer than the vertical length B0 of the light shielding convex portion 34. However, the length B2 between each engaging portion 41a and the engaging portion 41b arranged to face the engaging portion 41a is sufficiently smaller than the vertical length B0 of the light shielding convex portion 34.
The depths of the groove-shaped concave portions 341 and 342 correspond to the protruding lengths of the engaging portions 41a and 41b.
Each of the engaging portions 41a and 41b is easily bent when an external force is applied, and is easily restored to the original shape by an elastic force when the external force is no longer applied.

  For this reason, when the light-shielding convex portion 34 is inserted into the insertion hole 412, the engaging portions 41a and 41b come into contact with the light-shielding convex portion 34 and bend to restore the original shape at the positions where the groove-shaped concave portions 341 and 342 are formed. . As a result, the engaging portions 41a and 41b engage with the groove-shaped concave portions 341 and 342 so as to be detachable.

  Are inserted into the insertion holes 412, 412,..., And the engaging portions 41 a, 41 a, 41 b, 41 b of the respective insertion holes 412 are groove-shaped recesses 341 of the corresponding light shielding protrusions 34. , 342, the light shielding sheet 41 is supported by the light shielding convex portions 34, 34,. At this time, even if an unnecessary external force is applied to the light shielding sheet 41, the light shielding sheet 41 is protected from the light shielding convex portions 34, unless the engagement between the engaging portions 41 a, 41 b and the groove-shaped concave portions 341, 342 is comprehended. 34, ... will not drop out.

In addition, if the engaging portions 41a and 41b are engaged with the groove-shaped concave portions 341 and 342, it is not necessary to position the light shielding sheet 41 separately. For this reason, the workability | operativity of the attachment work of the light shielding sheet 41 improves.
Since each engaging part 41a, 41b and the groove-shaped recessed parts 341, 342 can be engaged / disengaged, the light shielding sheet 41 can be easily attached / detached at the time of maintenance / inspection of the display device 10, for example.

By the way, the structure of the light shielding sheet 41 is not limited to the one provided with the insertion holes 411, 411,... Or the insertion holes 412, 412,.
FIG. 20 is an enlarged rear view showing the configuration of the other insertion holes 413, 413,...
The formation position of each insertion hole 413 is the same as the formation position of each insertion hole 412. Further, the opening length of each insertion hole 413 in the long side direction is the same as the opening length of each insertion hole 412 in the long side direction.

However, the opening length B3 in the short side direction of the insertion hole 413 is equal to the above-described length B2. That is, the opening length B3 of the insertion hole 413 in the short side direction is shorter than the opening length B1 of the insertion hole 411 and the insertion hole 412 in the short side direction.
A cut is formed in the vertical direction along the short side of the insertion hole 413. The length B4 from the upper end to the lower end of the cut is equal to the opening length B1 in the short side direction of the insertion hole 412.
As a result, the upper and lower long sides 41c and 41d of the insertion hole 413 have flexibility. Long side parts 41c and 41d function as an engaging part in an embodiment of the invention like engaging parts 41a and 41b.

For this reason, when the light-shielding convex portion 34 is inserted into the insertion hole 413, the long side portions 41c and 41d are brought into contact with the light-shielding convex portion 34 and bent, and the original shape is restored at the positions where the groove-shaped concave portions 341 and 342 are formed. . As a result, the long side portions 41c and 41d engage with the groove-like concave portions 341 and 342 so as to be detachable.
Are inserted into the insertion holes 413, 413,..., And the long sides 41 c and 41 d of each insertion hole 413 are engaged with the groove-shaped recesses 341 and 342 of the corresponding light shielding protrusion 34. As a result, the light shielding sheet 41 is supported by the light shielding convex portions 34, 34,.

Embodiment 3. FIG.
In the configuration of the display device 10 and the television receiver 1 in the present embodiment, the light shielding convex portions 34, 34,... Are not provided, and a sheet member 44 described later is used instead of the light shielding sheet 41 and the insulating sheet 43. Is the same as that of the display device 10 and the television receiver 1 in the first embodiment. Hereinafter, differences between the first and third embodiments will be described, and other parts corresponding to those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

21 and 22 are longitudinal sectional views schematically showing the configuration of the display device 10 according to Embodiment 3 of the present invention. However, FIG. 21 shows a cross section at a position where the positioning convex portion 423 is projected (that is, a convex portion projecting position), and FIG. 22 shows a position where the positioning convex portion 423 is not projected (that is, the convex portion non-projected). The cross section at the projecting position is shown. 21 and 22 correspond to FIGS. 2 and 3 of the first embodiment. The arrows shown in FIGS. 21 and 22 indicate the direction of light.
FIG. 23 and FIG. 24 are an enlarged rear view and an enlarged perspective view showing a configuration of a part of the front cabinet 31. 23 and 24 correspond to FIGS. 4 and 5 of the first embodiment.

As shown in FIGS. 21 to 24, the front cabinet 31 is not provided with the light-shielding convex portions 34, 34,... Of the first embodiment.
25 and 26 are an enlarged rear view and an enlarged perspective view showing a state in which the panel unit is attached to the front cabinet 31. FIG. 25 and 26 show a state in which the panel unit is attached to the front cabinet 31 shown in FIGS. 23 and 24. FIG. 26 corresponds to FIG. 6 of the first embodiment.
As shown in FIGS. 21, 22, 25, and 26, the configuration of the panel unit and the attachment of the panel unit to the front cabinet 31 are the same as those in the first embodiment.

FIG. 27 is an enlarged perspective view for explaining attachment of the sheet member 44 to the heat sink 42.
FIG. 28 is an enlarged perspective view showing a state in which the sheet member 44 is attached to the heat sink 42 shown in FIG.
As shown in FIGS. 21, 22, 27, and 28, the configurations of the LEDs 25, 25,..., The LED substrate 26, and the heat sink 42 are the same as those of the first embodiment. Here, in Embodiment 3, a group of the LEDs 25, 25,..., The LED substrate 26, the heat sink 42, and the sheet member 44 is referred to as an LED light shielding unit. That is, FIG. 28 shows an LED light shielding unit.

The sheet member 44 has an L-shaped longitudinal cross-section, and one side of the L-shape is an insulating sheet 441 and the other side is a light shielding sheet 442. In other words, the sheet member 44 uses the insulating sheet 441 and the light shielding sheet 442 that are integrally formed.
The configuration and operational effects of the insulating sheet 441 are the same as the configuration and operational effects of the insulating sheet 43 of Embodiment 1 except that the light shielding sheet 442 rises from the long side portion on the front side.
The light shielding sheet 442 has such a shape that the lower part of the light shielding sheet 41 of Embodiment 1 extends downward and is integrated with the insulating sheet 441. Further, in place of the insertion holes 411, 411,..., Insertion holes 443, 443,.

The opening positions and opening dimensions of the insertion holes 443, 443,... Correspond to the protruding positions and vertical and horizontal dimensions of the positioning protrusions 423, 423,.
The light shielding sheet 442 includes a lower peripheral edge portion 21 a of the rear surface 212 of the display panel 21, a space S from the lower peripheral edge portion 21 a to the front end portion of the LED substrate 26, a front end surface of the LED substrate 26, and a substrate placement of the heat sink 42. It covers the front end surface of the portion 421 (except for the protruding positions of the positioning convex portions 423, 423,...).

The sheet member 44 is formed by adhering the upper surface of the insulating sheet 441 to the lower surface of the substrate mounting portion 421 in a state where the positioning convex portions 423, 423,... Are inserted into the insertion holes 443, 443,. The heat sink 42 is attached.
The heat sink 42 functions as a heat dissipation member in the embodiment of the present invention.

FIG. 29 is an enlarged perspective view for explaining attachment of the LED light shielding unit to the front cabinet 31. FIG. 29 shows a state in which the LED light shielding unit shown in FIG. 28 is attached to the front cabinet 31 shown in FIG.
30 and 31 are an enlarged rear view and an enlarged perspective view showing a state in which the LED light shielding unit is attached to the front cabinet 31. FIG. FIG. 30 shows a state in which the LED light shielding unit is attached to the front cabinet 31 shown in FIG. FIG. 31 shows a state where the LED light shielding unit shown in FIG. 28 is attached to the front cabinet 31 shown in FIG.

The LED shading unit is attached to the front cabinet 31 from the rear in substantially the same manner as the LED unit of the first embodiment. At this time, the upper end portion of the front surface of the light shielding sheet 442 contacts the lower peripheral edge portion 21 a of the rear surface 212 of the display panel 21.
As shown in FIGS. 21 and 22, even if the display device 10 does not include the light-shielding convex portions 34, 34,..., There is no light leakage space. This is because the light shielding sheet 442 covers the space S from the lower peripheral edge 21 a of the display panel 21 to the front edge of the LED substrate 26. Therefore, the light that has not entered the light guide plate 23 among the light emitted from the LEDs 25, 25,... Is shielded by the light shielding sheet 442, and therefore does not enter the display panel 21.

Also in the display device 10 as described above, since the light leakage is suppressed as in the first embodiment, the image quality of the video displayed on the display surface 211 is improved. In addition, since it is not necessary to bond the light shielding sheet 442 itself to another member (for example, the display panel 21), the light shielding sheet 442 is thin. Further, the light shielding sheet 442 cannot be removed unless the insulating sheet 441 is removed.
If the positioning protrusions 423, 423,... Are inserted through the insertion holes 443, 443,..., The positioning of the sheet member 44 with respect to the heat sink 42 is easy. Further, if the positioning protrusions 423, 423,... Are inserted into the positioning groove 35, the LED light shielding unit, and thus the light shielding sheet 442 can be easily positioned.

  By the way, in Embodiment 1-3, although the case where the display apparatus 10 was applied to the television receiver 1 provided with a receiving part was illustrated, it is not limited to this. The display device according to the present invention may be applied to an electric device that does not include a receiving unit, for example, a display for a personal computer.

The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is not intended to include the above-described meanings, but is intended to include meanings equivalent to the claims and all modifications within the scope of the claims.
As long as the effects of the present invention are obtained, the television receiver 1 or the display device 10 may include components that are not disclosed in the first to third embodiments.

DESCRIPTION OF SYMBOLS 1 Television receiver 10 Display apparatus 11 Receiving part 21 Display panel 211 Display surface 212 Back surface 21a Perimeter lower side part (periphery part by the side of a light source)
23 Light guide plate 23a Front 23b Lower end surface (one side end surface)
25 LED (light source)
26 LED board (board)
31 Front cabinet
34 Light-shielding convex portions 341, 342 Groove-shaped concave portions (concave portions)
41 light shielding sheet 411, 412, 413 insertion hole 41a, 41b engaging part 41c, 41d long side part (engaging part)
42 Heat sink
441 Insulating sheet 442 Shading sheet S Space

Claims (7)

A display panel having a display surface on the front side;
A light guide plate that is disposed on the back side of the display panel and emits light incident on the inside from one side end face from the front;
In a display device comprising: a light source disposed opposite to the one side end surface;
A display device comprising: a light shielding sheet that covers a peripheral portion of the light source side on the back surface of the display panel. A non-translucent substrate on which the light source is mounted;
Having a space between the substrate and the peripheral edge on the light source side;
The display device according to claim 1, wherein the light shielding sheet is disposed so as to cover the space. A cabinet surrounding a peripheral edge of the display surface;
A plurality of light-shielding protrusions protruding from the cabinet to the light guide plate side through the space and arranged side by side along the peripheral direction of the peripheral part on the light source side;
The light shielding sheet is provided with a plurality of insertion holes corresponding to the plurality of light shielding convex portions,
The display device according to claim 2, wherein the light shielding sheet has the light shielding convex portion inserted in the insertion hole. The light-shielding convex part is provided with a concave part that is recessed in a direction that intersects the projecting direction of the light-shielding convex part,
The display device according to claim 3, wherein an engaging portion that engages with the concave portion is provided at an opening edge portion of the insertion hole. The light-shielding convex portion is provided integrally with the cabinet,
The display device according to claim 4, wherein the recess has a groove shape. A heat dissipating member attached to the substrate to release heat generated by the light source to the outside;
An insulating sheet bonded to the heat dissipating member, and
The display device according to claim 2, wherein the light shielding sheet is provided integrally with an insulating sheet. A display device according to any one of claims 1 to 6;
A receiver for receiving a television signal,
The television receiver, wherein the display device displays an image based on a television signal received by the receiving unit.

Images