JP2017173609A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device in which confirmation that a diffusion plate is assembled is easy.SOLUTION: The liquid crystal display device includes a liquid crystal display element 1, a diffusion plate 2 which is arranged behind the liquid crystal display element 1, a case body 3 which stores the liquid crystal display element 1 and the diffusion plate 2, and a circuit board 4 on which a light source 5 for illuminating the liquid crystal display element 1 is arranged. The case body 3 has a notch part 310 which is opened so that a part of the diffusion plate 2 can be visually confirmed when viewed from a rear surface side. Thus, the diffusion plate 2 arranged in the case body 3 is visually confirmed from the rear surface side of the case body 3 and it is determined whether or not the diffusion plate 2 is inserted into the notch part 310 and whether or not the whole or a part of a confirmation mark 21b can be visually confirmed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device including a diffusion plate that diffuses light emitted from a light source.

  Conventionally, a liquid crystal display device in which a liquid crystal display element and a diffusion plate are arranged in a case body is known. In such a liquid crystal display device, the case body is generally formed of a white synthetic resin, the diffusion plate is formed of a light-transmitting synthetic resin, and the diffusion plate is generally inserted into a cut portion of the case body and fixed. is there.

JP 2006-267762 A

  In such a liquid crystal display device, when the liquid crystal display element is assembled after disposing the diffusion plate on the case body, there is no method for confirming whether or not the diffusion plate is assembled. That is, after the liquid crystal display element is assembled to the case body, the diffusion plate becomes invisible, so that it is not possible to confirm whether the diffusion plate is assembled.

  The present invention has been made in view of these points, and an object of the present invention is to provide a liquid crystal display device in which it is easy to confirm that a diffusion plate has been assembled.

In order to achieve the above object, the present invention
A liquid crystal display element;
A diffusion plate disposed behind the liquid crystal display element;
A case body that houses the liquid crystal display element and the diffusion plate;
A circuit board on which a light source for illuminating the liquid crystal display element is disposed,
The case body has a cut portion into which a part of the diffusion plate is inserted,
A part of the diffuser plate inserted from the cut portion is visible when viewed from the back side of the case body.

  According to the present invention, the diffusion plate has a confirmation mark, and the confirmation mark is visible when the case body is viewed from the back side.

According to the present invention, the diffusion plate has an adjustment section on which dark ink is printed.

  ADVANTAGE OF THE INVENTION According to this invention, the liquid crystal display device with easy confirmation that the diffuser plate was assembled | attached can be provided.

The disassembled perspective view of the liquid crystal display device which shows embodiment of this invention. The perspective view which shows the assembly | attachment of the diffusion plate and case body of the liquid crystal display device. The figure which looked at FIG. 2 from the back side. A enlarged view of FIG. B enlarged view of FIG.

  An example in which the present invention is applied to a liquid crystal display device for a vehicle will be described as an embodiment with reference to FIGS.

  In the present embodiment, the liquid crystal display device is arranged on the back side of the TFT type liquid crystal display element 1 and has a light diffusion property, and a case body 3 in which the liquid crystal display element 1 and the diffusion plate 2 are housed (supported). And a hard circuit board 4 disposed behind the case body 3 and a light source 5 mounted on the circuit board 4 and illuminating the liquid crystal display element 1 from the back.

  In the liquid crystal display element 1, liquid crystal molecules are sealed between two substrates on which transparent electrodes are formed, and a polarizing film (not shown) is bonded. A plurality of metal connection terminals 11 are fixed to the liquid crystal display element 1. The connection terminal 11 has a lead portion 12 and is electrically connected to the circuit board 4 by being soldered to a through hole provided in the circuit board 4.

  The diffusing plate 2 is a light-transmitting synthetic resin, and a black halftone dot layer (adjustment unit) 21a for light control is provided on the back surface thereof so that the light from the light source 5 illuminates the liquid crystal display element 1 uniformly. , And a check mark 21b printed by the same process as the same ink as the halftone dot layer 21a. The confirmation mark 21b is formed at a position to be inserted into a notch 310, which will be described later. In this embodiment, in addition to the four corners (two diagonals) of the diffusion plate 2, in addition to the positioning fitting described later. It is printed at the end of the opposite side where the joining portion 22 is not formed.

  Further, the diffusion plate 2 has a positioning fitting portion 22 that penetrates or slides into the positioning portion of the case body 3.

  The case body 3 is a white synthetic resin, and includes a placement portion 31 on which the liquid crystal display element 1 and the diffusion plate 2 are placed, and a peripheral wall 32 formed vertically from the placement portion 31 toward the circuit board 4. An opening 33 surrounded by the peripheral wall 32, an insertion portion 34 into which the lead portion 12 is inserted, a positioning portion 35 in which the diffusion plate 2 is positioned, and a through hole for screwing to the circuit board 4. Flange portion 36.

  A plurality of cut portions 310 into which the diffusion plate 2 is inserted are formed in the mounting portion 31. The incision part 310 is a part corresponding to the confirmation mark 21b in order to visually recognize the assembly confirmation mark 21b printed on the diffusion plate 2. In this embodiment, the notch part 310 has four corners (two Diagonal) and the end of the opposite side where the positioning part 35 is not formed.

  Moreover, the notch part 310 should just be opened to such an extent that the confirmation mark 21b printed on the diffusion plate 2 can be partially recognized when viewed from the back side.

  The diffusion plate 2 is placed on the placement portion 31 of the case body 3 with the side on which the halftone dot layer 21a and the confirmation mark 21b are printed as the back side. At that time, in the diffusion plate 2, the positioning fitting portion 22 of the diffusion plate 2 is arranged in the positioning portion of the case body 3, and the portion where the confirmation mark 21 b of the diffusion plate 2 is printed is inserted into the cut portion 310. Thus, it is held by the case body 3.

  The diffusion plate 2 arranged in the case body 3 is visually recognized from the back side of the case body 3, and it can be determined whether the diffusion plate 2 is inserted into the cut portion 310 and all or part of the confirmation marks 21b can be visually recognized. .

  As described above, the liquid crystal display element 1, the diffusion plate 2 disposed behind the liquid crystal display element 1, the case body 3 that houses the liquid crystal display element 1 and the diffusion plate 2, and the light source that illuminates the liquid crystal display element 1. The case body 3 includes a notch portion 310 that is partially opened so that the case body 3 can be visually recognized when the diffuser plate 2 is viewed from the back side. It is possible to visually recognize the diffusion plate 2 arranged on the rear side of the case body 3 and determine whether the diffusion plate 2 is inserted into the cut portion 310 and all or a part of the confirmation marks 21b can be visually recognized.

  Further, the diffusion plate 2 has a confirmation mark 21b, and when the case body 3 is viewed from the back side, the confirmation mark 21b is visible so that even after the liquid crystal display element 1 is assembled, It can be easily confirmed that the diffusion plate 2 is assembled.

  In addition, the case body 3 has a placement portion 31 on which the diffusion plate 2 is disposed, and the confirmation mark 21b is visible when viewed from the back side, so that the liquid crystal display element 1 is assembled. Even after this, it can be easily confirmed that the diffusion plate 2 is assembled.

DESCRIPTION OF SYMBOLS 1 Liquid crystal display element 2 Diffusion plate 3 Case body 4 Circuit board 5 Light source 11 Connection terminal 21a Halftone dot layer (adjustment part)
21b Mark 31 for confirmation 31 Placement part 32 Perimeter wall 33 Opening part 34 Insertion part 35 Positioning part 36 Flange part 310 Notch part

Claims (3)

A liquid crystal display element;
A diffusion plate disposed behind the liquid crystal display element;
A case body that houses the liquid crystal display element and the diffusion plate;
A circuit board on which a light source for illuminating the liquid crystal display element is disposed,
The case body has a cut portion into which a part of the diffusion plate is inserted,
A part of the diffusion plate inserted from the cut portion is visible when viewed from the back side of the case body. The diffusion plate has a confirmation mark,
The liquid crystal display device according to claim 1, wherein the confirmation mark is visible when the case body is viewed from the back side. The liquid crystal display device according to claim 1, wherein the diffusion plate includes an adjustment unit on which dark ink is printed.

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