JP2009282435A - Display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display for reducing a cost. <P>SOLUTION: This display has a case 1, a light guide panel 2, a light source 3, a liquid crystal panel 4, and a cover 5. A projected part 25 is provided in each of the first and second side face parts 21, 22 of the light guide panel 2, a cut-out part 16 is provided in each of the first and second side wall parts 11, 12 of the case 1, and pressing parts 56 are provided to press respectively the first and second side face parts 21, 22 onto the first and second peripheral wall parts 51, 52 of the case 1 toward the third and fourth peripheral wall parts 53, 54, and to support the projected parts 25 with the cut-out parts 16. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device using a display member made of, for example, a liquid crystal panel.

This type of display device is described in, for example, Patent Document 1 below. The display device described in Patent Document 1 includes a light guide plate, a light source, and a liquid crystal panel housed between a rectangular case made of a metal material and a cover made of the same metal material. The liquid crystal panel is housed and fixed in the case through a mold frame made of synthetic resin.
Japanese Patent Laid-Open No. 10-039280

  However, since the display device described in Patent Document 1 requires a mold frame for housing and fixing the light guide plate between the case and the cover, there is a problem that the number of parts and the number of assembling steps increase, leading to an increase in cost. is there.

  The present invention focuses on the above-described problems and provides a display device capable of realizing cost reduction.

  In order to solve the above-mentioned problems, the present invention is a case made of a metal material having a rectangular bottom, first to fourth side walls surrounding the four sides of the bottom, and an opening facing the bottom. A light guide plate having first to fourth side portions facing the first to fourth side wall portions of the case and housed in the case, and the first to fourth of the light guide plate. A light source housed in the case so as to face an arbitrary side surface portion of the side surface portions, a display member that is disposed on the light guide plate and is illuminated by light from the light source guided through the light guide plate, An opening window corresponding to the display member; an edge surrounding the opening window; and first to fourth peripheral wall portions corresponding to the side wall; and at least the light source combined with the case A cover forming a storage space for storing the light guide plate; In the display device, the first and second side surface portions adjacent to each other in the light guide plate are provided with projecting portions projecting toward the first and second side wall portions, and the first and second side portions in the case are provided. A cutout portion corresponding to the protruding portion is provided in each of the first and second side wall portions corresponding to the second side surface portion, and the first and second peripheral wall portions corresponding to the protruding portion in the cover are provided with the notches. Each of the first and second side surface portions is pressed toward the third and fourth peripheral wall portions facing the first and second peripheral wall portions, and the protruding portion is sandwiched between the cutout portions. It is characterized in that a pressing portion supported by is provided.

  Further, the present invention is characterized in that a pressing surface that is pressed by the pressing portion is provided on the protruding portion.

  ADVANTAGE OF THE INVENTION According to this invention, the initial purpose can be achieved and the display apparatus which can achieve cost reduction can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 3 show an embodiment of a display device according to the present invention. FIG. 1 is an exploded perspective view of the display device, FIG. 2 is a cross-sectional view of a main part showing an assembled state of the display device, and FIG. It is a principal part perspective view of a light-guide plate.

  In FIG. 1, the display device according to the present embodiment includes a case 1, a light guide plate 2, a light source 3, a liquid crystal panel (display member) 4, and a cover 5. In addition, you may add optical components, such as a light-diffusion sheet, a reflection sheet, and a prism sheet, as needed.

  The case 1 is formed by press-molding a predetermined metal thin plate, and has a rectangular bottom portion 10, first to fourth side wall portions 11 to 14 surrounding the four sides of the bottom portion 10, and an opening facing the bottom portion 10. 15.

  The first to fourth side wall portions 11 to 14 are folded back approximately 90 degrees from the bottom portion 10, and the light guide plate 2, which will be described later, protrudes from each of the adjacent first and second side wall portions 11 and 12. A notch 16 corresponding to the portion is formed, and the light source 3 is disposed along the third side wall 13.

  The light guide plate 2 is made of a translucent synthetic resin such as acrylic or polycarbonate, and has a rectangular light exit surface 20 corresponding to the liquid crystal panel 3 and first to fourth side wall portions 11 to 14 of the case 1. It has 1st-4th side part 21-24.

  Of the first to fourth side portions 21 to 24, adjacent first and second side portions 21 and 22 are formed with protruding portions 25 corresponding to the notches 16 of the case 1.

  The projecting portion 25 partially projects from the side surface portions 21 and 22 toward the first and second side wall portions 11 and 12 so as to be fitted into the notch portion, and serves as a pressing portion described later of the cover 5. It has the press surface 26 (refer FIG. 3) which consists of a corresponding inclined surface.

  Of the first to fourth side portions 21 to 24, the third side portion 23 functions as a light incident surface for introducing light from the light source 3, and emits light introduced from the light incident surface to the light exit surface 20. The surface light is emitted through. In this case, the third side surface portion 23 is formed as a concave portion that houses the light source 3.

  The light source 3 is made of a light emitting diode, for example, and is arranged in a line on the light source substrate.

  Various types of panels can be adopted as the liquid crystal panel 4, and the liquid crystal panel 4 is disposed on the light guide plate 2 and displays various information by receiving light from the light guide plate 2.

  The cover 5 is formed by press-molding a predetermined thin metal plate like the case 1, and is combined with the case 1 to form a storage space for storing the light source 3, the light guide plate 2, and the liquid crystal panel 4. The cover 5 includes an opening window portion 50 corresponding to the liquid crystal panel 4, first to fourth peripheral wall portions 51 to 54 corresponding to the side wall portions 11 to 14 of the case 1, and the first to fourth peripheral walls. It has an edge portion 55 that is bent 90 degrees from the portions 51 to 54 and covers the periphery of the liquid crystal panel 4 and that defines the opening window portion 51.

  Of the first to fourth peripheral wall portions 51 to 54, the adjacent first and second peripheral wall portions 51 and 52 have cut-and-raised piece-like elasticity with the tips bent toward the inside of the cover 5. A pressing portion 56 is formed.

  The pressing portion 56 is formed on the third and fourth peripheral wall portions 53 and 54, which are opposed to the first and second peripheral wall portions 51 and 52, respectively, of the first and second side surface portions 21 and 22 of the light guide plate 2. The projection 25 is sandwiched and supported with the notch 16 while being pressed.

  Assembling the display device configured as described above includes, for example, housing the light source 3 and the light guide plate 2 in the case 1, placing the liquid crystal panel 4 on the light guide plate 2, and finally covering the case 1 with the cover 5. Is done.

  Position alignment of the case 1 and the light guide plate 2 is performed by fitting the notch 16 and the protrusion 25 to each other. When the cover 5 is put on the case 1 and fixed, the pressing portion 56 is guided through the pressing surface 26. In a state where the optical plate 2 is pressed toward the third and fourth peripheral wall portions 53 and 54 and the notch portion 16 (bottom portion 10), and the protruding portion 25 is sandwiched between the pressing portion 56 and the notch portion 16. The light guide plate 2 is fixed in the case 1. By pressing the light guide 2 with the pressing portion 56 in this way, the elastic pressing portion 56 follows the size change even if the size of the light guide plate 2 changes due to expansion and contraction accompanying a cooling cycle. Since 2 is pressed, stable holding becomes possible.

  The cover 5 can be fixed to the case 1 by, for example, folding a caulking fixing piece formed on the peripheral wall portions 51 to 54 of the cover and engaging the bottom portion 10 of the case 1 with screws or hooks. Can also be done.

  Moreover, the notch part 16, the protrusion part 25, and the press part 56 can be provided in arbitrary sides, if it is two adjacent sides.

  As described above, in the present embodiment, the metal having the rectangular bottom portion 10, the first to fourth side wall portions 11 to 14 surrounding the four sides of the bottom portion 10, and the opening 15 facing the bottom portion 10. A case 1 made of a material, and a light guide plate 2 having first to fourth side portions 21 to 24 facing the first to fourth side wall portions 11 to 14 of the case 1 and housed in the case 1 The light source 3 housed in the case 1 so as to face any of the first to fourth side portions 21 to 24 of the first to fourth side portions 21 to 24 of the light guide plate 2 and the light guide plate 2 disposed on the light guide plate 2. The liquid crystal panel 4 illuminated by the light from the light source 3 guided through the light plate 2, the opening window 50 corresponding to the liquid crystal panel 4, the edge 55 surrounding the opening window 50, and the side walls 11-14. The first to fourth peripheral wall portions 51 to 54 corresponding to the In a display device having a cover 5 that is combined to form a storage space for storing the light source 3, the light guide plate 2, and the liquid crystal panel 4, each of the first and second side portions 21 and 22 adjacent to each other in the light guide plate 2. Are provided with projecting portions 25 projecting toward the first and second side wall portions 11, 12, and in the case 1, the first and second side wall portions 11, 22 corresponding to the first and second side surface portions 21, 22 are provided. 12 is provided with a notch 16 corresponding to the protruding portion 25, and the first and second side wall portions 21 and 22 are provided at the first and second peripheral wall portions 51 and 52 corresponding to the protruding portion 25 in the cover 1. Pressing each pressing toward the third and fourth peripheral wall portions 53, 54 facing the first and second peripheral wall portions 51, 52, and supporting the projecting portion 25 with the notch portion 16. By providing the part 56, the mold frame is unnecessary, Reducing the goods number and assembly steps, it is possible to realize a cost reduction.

  Moreover, in this embodiment, by providing the pressing surface 26 pressed by the pressing part 56 in the protrusion part 25, the light-guide plate 2 is made into the 3rd, 4th surrounding wall part 53,54 side, and the notch part 16 (bottom part 10). Since it can be pressed toward the two directions on the side, the light guide plate 2 can be reliably supported.

  3 and 4 show another embodiment of the present invention. FIG. 3 is an exploded perspective view of the display device, and FIG. 4 is a cross-sectional view of a main part showing an assembled state.

  The difference between the present embodiment and the one embodiment is that the liquid crystal panel 4 is not housed in the housing space formed by the case 1 and the cover 5, but between the cover 5 and the newly adopted second cover 6. The other points are the same as those in the first embodiment.

  The second cover 6 is made of the same metal material as that of the cover 5, and a see-through window that allows the liquid crystal panel 4 to be visually recognized is formed.

  Although illustration is omitted, a cushion material or a double-sided tape having cushioning properties is disposed between the liquid crystal panel 4 and the cover 5 and the second cover 6. Cut and raised pieces for positioning the liquid crystal panel 4 are formed. The second cover 6 can be fixed to the case 1 by using, for example, caulking, screw tightening, or hook connection.

1 is an exploded perspective view of a display device according to an embodiment of the present invention. The principal part sectional view which shows the assembly state of the embodiment. The principal part perspective view of the light-guide plate by the same embodiment. The disassembled perspective view of the display apparatus by other embodiment of this invention. The principal part sectional view which shows the assembly state of the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Light-guide plate 3 Light source 4 Liquid crystal panel (display member)
DESCRIPTION OF SYMBOLS 5 Cover 6 2nd cover 10 Bottom part 11-14 1st-4th side wall part 15 Opening part 16 Notch part 20 Light emission surface 21-24 First to 4th side part 25 Projection part 26 Pressing surface 50 Opening window part 51-54 1st-4th surrounding wall part 55 Edge part 56 Pressing part

Claims (2)

A case made of a metal material having a rectangular bottom, first to fourth side walls surrounding the four sides of the bottom, and an opening facing the bottom;
A light guide plate having first to fourth side portions facing the first to fourth side wall portions of the case and housed in the case;
A light source housed in the case so as to face any side surface portion of the first to fourth side surface portions of the light guide plate;
A display member disposed on the light guide plate and illuminated by light from the light source guided through the light guide plate;
An opening window corresponding to the display member; an edge surrounding the opening window; and first to fourth peripheral wall portions corresponding to the side wall; and at least the light source combined with the case A cover forming a storage space for storing the light guide plate;
In a display device having
Protruding portions that protrude toward the first and second side wall portions are provided on the first and second side surface portions adjacent to each other in the light guide plate,
In the case, each of the first and second side wall portions corresponding to the first and second side surface portions is provided with a notch portion corresponding to the protruding portion,
In the cover, the first and second peripheral wall portions of the first and second peripheral wall portions corresponding to the protrusions are respectively opposed to the first and second peripheral wall portions. A display device, comprising: a pressing portion that presses toward the peripheral wall portion and supports the projecting portion with the notch portion. The display device according to claim 1, wherein a pressing surface that is pressed by the pressing portion is provided on the protruding portion.

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