JP2008071919A - LED light leakage prevention structure and display device - Google Patents

Abstract

Provided is a technique for preventing light leakage of an LED provided for notifying an operating state in a display device.
An LED cover is sandwiched between a front cover and a front cabinet. The LED display unit 19 of the front cover 14 includes five display holes 21 that radiate LED light to the outside in a substantially horizontal row. A first light leakage prevention rib 20 is provided between the display holes 21. A second light leakage prevention rib 24 extending horizontally is provided on the upper portion of the LED cover opening 27 of the front cabinet 16.
[Selection] Figure 2

Description

  The present invention relates to an LED light leakage prevention structure and a display device, and in particular, in a light emitting means for displaying a plurality of LEDs arranged in series, a structure for preventing leakage of light emitted from the LED and a display device having the structure. About.

  In various apparatuses, an LED (Light Emitting Diode) is used to notify the operating state of the apparatus. For example, in a liquid crystal television, a plurality of lamps such as a power lamp, a reservation lamp, and a brightness sensor lamp are provided by LEDs.

  In the case of a liquid crystal television, these LEDs are provided on the outer frame of the liquid crystal display panel. In general, the outer frame portion is made as narrow as possible due to design requirements, and the installation location of the aforementioned LEDs is very limited.

  Even if there are such restrictions, the LED display needs to be properly recognized by the user. For example, there are three LEDs arranged side by side, and even if the middle LED emits light, it may be visually recognized if the left is emitting light. This occurred because the light from the LED leaked inside the apparatus. Further, when light leaks to the display panel portion, the visibility of the user is lowered.

  FIG. 5 is a view showing a general mounting structure of the LED cover 56. This figure shows a view seen from the back side of the front cabinet 54 for easy understanding of the mounting structure. A front cover 52 is fitted in the front cabinet 54.

  As shown in the figure, an LED display 60 of the front cover 52 is fitted into an LED display opening 58 provided in the front cabinet 54. The LED display unit 60 is provided with ribs 62. The LED cover 56 is attached by inserting the rib 62 into the insertion hole 57 provided in the LED cover 56.

  FIG. 6 is a view in which the LED cover 56 is attached to the front cover 52. FIG. 7 is a diagram showing a state in which a substrate (hereinafter also referred to as “LED substrate”) 64 on which LEDs are provided is further attached. As shown in FIG. 7, the upper portion of the LED cover 56 (indicated by a dotted line in the figure) does not have a rib that prevents the light of the LED from leaking outside. Therefore, LED light leaks from this gap.

  In order to overcome the above-described problems, a technique for reducing light leakage has been proposed. For example, a technique is disclosed in which an exterior panel is provided with a plurality of light-blocking blocks and the light-blocking block is formed in each LED region by penetrating the tip of the light-blocking block into the LED substrate to block light between the LEDs. (See Patent Document 1).

JP-A-1-165182

  The technique disclosed in the former has an effect of preventing direct light leakage in the left-right direction, but depending on the mounting variation of the LED board, light is indirectly transmitted in the left-right direction and the back-side direction due to light wrapping from the back-side direction. The problem of leaking out remains. Since the shading block is a separate part, there still remains a problem that light leakage occurs due to variation in mounting.

  In addition, in the technique of Patent Document 1, it is theoretically possible to increase the thickness of the cabinet or lengthen the rib in order to sufficiently prevent light leakage. There is a problem that it is very difficult to prevent sink marks.

  This invention is made | formed in view of such a background, The objective is to provide the technique which prevents the light leakage of LED.

One embodiment of the present invention relates to an LED light leakage prevention structure. This LED light leakage prevention structure is an LED light leakage prevention structure provided in a front cabinet formed by fitting a front cover provided with a plurality of LED display units, and an LED substrate on which a plurality of LEDs are mounted. The front cover has light leakage prevention means in the adjacent direction of the plurality of LEDs, and the front cabinet has light leakage prevention means in front and in the vertical direction of the plurality of LEDs, and the LED substrate. Has means for preventing light leakage behind the plurality of LEDs.
The light leakage prevention structure of the LED may include an LED cover provided with a light guide part that guides the light of the LED to the LED display part, and the LED cover is locked to the front cover. The LED board may be fitted to the front cabinet, and the LED board may be fixed to the front cabinet.
In the light leakage prevention structure of the LED, the front cover may include a first light leakage prevention rib so as to be positioned between adjacent LEDs as light leakage prevention means in the adjacent direction of the plurality of LEDs. The LED cover may be sandwiched between the front cover and the front cabinet, and may include a rib insertion portion for inserting the first light leakage prevention rib. The front cabinet is a part of the LED cover. And has an opening into which the portion is inserted, and as a light leakage prevention means in front of the plurality of LEDs and in the vertical direction, is located above the opening and between the opening and the central side of the display device. A second light leakage prevention rib extending along the opening; and a third light leakage prevention rib positioned below the opening and extending along the opening between the opening and the central side of the display device. It may be a rib.
Another embodiment of the present invention relates to a display device. This apparatus includes the LED light leakage prevention structure of the above aspect.

  ADVANTAGE OF THE INVENTION According to this invention, the structure which prevents the light leakage of LED is realizable. In addition, a display device having the light leakage prevention structure can be provided.

Hereinafter, an LED light leakage prevention structure of an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the display device 10 having an LED light leakage prevention structure includes a display unit body 12 and a stand 13. Examples of the display device 10 include a liquid crystal television and a plasma television.

  The display unit body 12 includes a display panel 17, a front cover 14, and a front cabinet 16. Furthermore, an LED display unit 19 that displays an operating state of the display device 10 by an LED is provided in the lower right portion when viewed from the front of the front cover 14.

  FIG. 2 is a perspective view seen from the back side in a state where the front cover 14, the front cabinet 16, and the LED cover 18 are separated in order to explain the LED light leakage prevention structure that is characteristic in the present embodiment. Yes. The LED light leakage prevention structure includes a front cabinet 16, a front cover 14 fitted to the front cabinet 16, and an LED cover 18 that covers a plurality of LEDs. At this time, the LED cover 18 is sandwiched between the front cover 14 and the front cabinet 16 as shown in FIG.

  The front cover 14 has a frame shape that is approximately the same size as the outer shape of the front cabinet 16, and includes the LED display portion 19 as described above. Since FIG. 2 is a view of the front cover 14 as viewed from the back, the LED display unit 19 is provided on the lower left side in FIG.

  In addition, the LED display unit 19 includes five display holes 21 that radiate LED light to the outside in a substantially horizontal row. A first light leakage prevention rib 20 having a desired height is provided between the display holes 21. Therefore, when the front cover 14, the front cabinet 16, and the LED cover 18 are integrated, the first light leakage prevention rib 20 is provided so as to be positioned between adjacent LEDs. Here, four first light leakage prevention ribs 20 are provided. The “predetermined height” will be described later.

  Subsequently, the LED cover 18 is provided with five light guide portions 23 in a row at positions corresponding to the display holes 21 of the LED display portion 19. Furthermore, a total of four rib insertion holes 22 are provided between the light guide portions 23. The first light leakage prevention rib 20 is inserted into the rib insertion hole 22. At this time, the first light leakage prevention rib 20 protrudes by a predetermined length from the rib insertion hole 22 and is higher than the light guide portion 23. More specifically, the height of the first light leakage prevention rib 20 is set so that the LED (not shown) fits in the gap between the height of the light guide portion 23 and the first light leakage prevention rib 20. .

  The LED cover 18 includes side ribs 25 on both sides. The height of the side ribs 25 is generally set so as to be aligned with a height that protrudes when the first light leakage prevention rib 20 is inserted into the LED cover 18.

  Subsequently, the front cabinet 16 includes an LED cover opening 27 in a lower left portion when viewed from the back side (lower right portion when viewed from the front). A part of the LED cover 18 integrated with the front cover 14 is fitted into the LED cover opening 27. On the upper portion of the LED cover opening 27, a second light leakage prevention rib 24 extending horizontally is provided at a predetermined height. In other words, the second light leakage prevention rib 24 extending in the horizontal direction (along the LED cover opening 27) is provided between the LED cover opening 27 and the center side of the display device 10.

  The second light leakage prevention rib 24 is a part of the rib that is provided in the outer portion of the frame shape of the LED cover 18 and maintains the shape of the LED cover 18 and also functions to position the entire front cabinet 16. . The height of the second light leakage prevention rib 24 should not be lower than the same height as that of the first light leakage prevention rib 20 protruding when the front cover 14, the LED cover 18, and the front cabinet 16 are integrated. Set to align.

  A third light leakage prevention rib 26 is provided below the LED cover opening 27 substantially in parallel with the second light leakage prevention rib 24. The third light leakage prevention rib 26 is a part of a rib that performs the same function as the outer frame of the front cabinet 16 or the second light leakage prevention rib 24. The height of the third light leakage prevention rib 26 may be set similarly to the height of the second light leakage prevention rib 24.

  In addition, as can be seen from FIG. 3, the LED cover opening 27 is provided with tooth-shaped protruding pieces 31 on the upper and lower circumferences so as to face the inside of the opening. The protruding piece 31 has a shape and a position that sandwich the light guide portion 23 of the LED cover 18 from above and below. Thereby, it is reduced that the light of LED leaks from the front to parts other than the display part main body 12. FIG.

  4 shows a state in which the front cover 14, the front cabinet 16, and the LED cover 18 shown in FIG. On the back side of the figure of the LED substrate 30. The desired LED is attached. As described above, the LED fits in the height gap between the light guide portion 23 and the first light leakage prevention rib 20. Therefore, it can prevent that the light of LED leaks to adjacent LED. Further, the LED substrate 30 can prevent the light of the LED from leaking to the back surface (the front side in the figure).

  Furthermore, since the second light leakage prevention rib 24 is present above the LED in FIG. 4, the leakage of light from the upper side to the adjacent LED region is prevented, and the display device central direction, more specifically, display. It can be avoided that the light of the LED leaks in the panel direction and the display quality is lowered. Further, since the third light leakage prevention rib 26 exists below the LED in FIG. 4, it is possible to prevent the leakage of the light from the lower part to the adjacent LED region.

  Further, as shown in FIG. 3, since the LED cover 18 is sandwiched between the front cover 14 and the front cabinet 16, it is not necessary to screw the LED cover 18 with screws.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements, and such modifications are also within the scope of the present invention.

  The present invention can be widely applied to a structure for preventing leakage of light emitted from the LED and an image display apparatus having the structure in a light emitting means for displaying a plurality of LEDs side by side.

1 is a schematic external view of a display device having a light leakage prevention structure according to an embodiment. It is the perspective view seen from the back side in the state which isolate | separated the front cover, the front cabinet, and the LED cover. It is the figure which showed the state with which the front cover, the front cabinet, and the LED cover were united. It is the figure which showed the state which attached the LED board further to the state which integrated the front cover, the front cabinet, and LED cover which were shown in FIG. It is the figure which showed the general attachment structure of the LED cover in a prior art. In prior art, it is the figure which attached the LED cover to the front cabinet and the front cover. It is the figure which showed the state which attached the LED board further to the structure shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Display apparatus 13 Stand 14 Front cover 16 Front cabinet 18 LED cover 20 1st light leak prevention rib 22 Rib insertion hole 23 Light guide part (light guide part) 24 2nd light leak prevention rib 26 3rd light leak Prevention rib 27 LED cover opening 30 LED substrate 32 Projection piece

Claims (4)

An LED light leakage prevention structure provided in a front cabinet formed by fitting a front cover having a plurality of LED display portions,
A plurality of LEDs mounted on the LED substrate; and the front cover includes light leakage prevention means in the adjacent direction of the plurality of LEDs. An LED light leakage prevention structure, comprising light leakage prevention means, wherein the LED substrate has light leakage prevention means to the rear of the plurality of LEDs.   The LED light leakage prevention structure according to claim 1, further comprising: an LED cover provided with a light guide portion that guides the light of the LED to the LED display portion, and the LED cover is locked to the front cover. An LED light leakage prevention structure, wherein the LED board is fitted to the front cabinet, and the LED substrate is fixed to the front cabinet. 3. The LED light leakage prevention structure according to claim 2, wherein the front cover includes a first light leakage prevention rib so as to be positioned between adjacent LEDs as light leakage prevention means in the adjacent direction of the plurality of LEDs. ,
The LED cover is sandwiched between the front cover and the front cabinet, and includes a rib insertion portion for inserting the first light leakage prevention rib,
The front cabinet has an opening into which a part of the LED cover is inserted, and is positioned above the opening as a means for preventing light leakage in front and up and down directions of the plurality of LEDs. And a second light leakage prevention rib extending along the opening between the opening and the center side of the display device, and a third light leakage preventing rib extending along the opening between the opening and the center side of the display device. An LED light leakage prevention structure comprising: a light leakage prevention rib.   A display device comprising the LED light leakage prevention structure according to claim 1.

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