JPH023573Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention has numbers on the panel surface of display panels, control panels, etc.
The present invention relates to a transmissive liquid crystal display that displays characters, etc.

Conventionally, this type of transmissive liquid crystal display has a display panel,
The structure was such that a milky white film for diffusion was adhesively fixed between a transmission type liquid crystal display element facing a display window formed on a panel such as a control panel and an optical path hole formed on a printed sheet.

However, since the bonding work is generally performed while positioning, the workability is poor, and the film and the like are likely to fall off due to deterioration of the adhesive.

The present invention was devised in view of the above points, and the diffusion member, which was conventionally made into a film shape, is formed into a plate shape, and the diffusion member is used to set the gap between the liquid crystal display element and the printed sheet. The present invention provides a transmissive liquid crystal display which eliminates the above-mentioned conventional disadvantages by having a structure that also serves as a spacer.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

Inside a display window 2 formed in a panel 1 such as a display panel or a control panel, a printed sheet 4 having a square hole 3 serving as an optical path is fixed to a fixed wall 5. A square fitting portion 7 as a convex portion slightly smaller than the square hole 3 of a diffusive opalescent plate 6 is fitted into the square hole 3 of the print sheet 4, and the opalescent plate 6 itself is attached to the print sheet 4. Fixed to. Further, the outer edge portion 6a of the panel-side surface of the opalescent plate 6 is masked except for the central portion, which is slightly smaller than the polarizing film of a transmissive liquid crystal display element, which will be described later. On the panel 1 side of the opalescent board 6, a transmissive liquid crystal display element 9 formed by embedding a display pattern 8 inside the glass is disposed at a position facing the display window 2 of the panel 1, and is coated with adhesive or burrs 10. The lead wires 11 which are reinforced with the like and protrude from the transmissive liquid crystal display element 9 are held by the print sheet 4 by being electrically connected to the attachment holes 12 of the print sheet 4 as appropriate. The transmissive liquid crystal display element 9 has a display pattern 8 on the surface on the display window 2 side.
A polarizing film 13 covering the area is stretched. Note that arrow A indicates illumination light.

Next, the effect will be explained.

In this configuration, the square fitting part 7 of the opalescent plate 6 is fitted into the rectangular hole 3 of the print sheet 4 to fix the opalescent plate 6 to the print sheet 4, and in this fitted state, the transmission type liquid crystal is inserted from the print sheet 4. A predetermined gap is formed between the transmissive liquid crystal display element 9 and the print sheet 4 due to the thickness t of the opalescent plate 6 protruding toward the display element 6 side, so that adhesive or burrs 10 on the transmissive liquid crystal display element 9 can be removed. Ensure that the installation interval is sufficient. and,
The lead wires 11 of the transmissive liquid crystal display element 9 are connected to the mounting holes 12 of the printed sheet 4 as appropriate, and the transmissive liquid crystal display element 9 is fixed to the printed sheet 4.

In this way, the square fitting part 7 is attached to the opalescent plate 6 for diffusion.
Since it has a structure in which it is formed and fixed by fitting into the square hole 3 of the print sheet 4, it has excellent durability compared to the conventional method in which a milky white film is glued for diffusion, and the installation work is extremely easy. However, due to the thickness t of the opalescent plate 6, the lead wires 11 of the transmissive liquid crystal display element 9 can be connected to the printed sheet 4.
A gap can be formed for the adhesive or glue 10 when connecting the transmissive liquid crystal display element 9, and the work of attaching the transmissive liquid crystal display element 9 can be carried out extremely easily.

In addition, since the outer edge 6a of the surface of the opalescent plate 6 is masked, light of uniform intensity can be incident on the transmissive liquid crystal display element 9, and the light intensity of each part of the display pattern 8 can be made uniform. can. Furthermore, since the display pattern 8 portion of the transmissive liquid crystal display element 9 is covered with the polarizing film 13, the visibility of characters, numbers, etc. displayed on the display pattern 8 can be improved.

In the above embodiment, the shapes of the opalescent plate 6 and the square fitting portion 7 are square, but these shapes are determined according to the distribution shape of the display pattern 8 of the transmissive liquid crystal display element 9. As desired, it is not limited to a rectangular shape.

As explained above, in the present invention, the opalescent diffusion member provided on the back side of the transmissive liquid crystal display element is formed into a plate shape, and this diffusion member is fitted and fixed to the printed sheet, and the liquid crystal display element and the printed Since it has a structure with a spacer function to maintain a predetermined gap between the sheet and the sheet, it is more durable than the conventional method of gluing a milky white film for diffusion, and it is easier to assemble the diffusion member. The installation work can be made extremely easy, and the gap between the liquid crystal display element and the print sheet can be set to a predetermined value simply by fixing the diffusion member to the print sheet, thereby improving the work efficiency of the assembly. Furthermore, the gap between the liquid crystal display element and the print sheet is set using the originally built-in diffusion member, so there is no need to provide a new part just for setting the gap.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a main part of a transmissive liquid crystal display device according to an embodiment of the present invention, Fig. 2 is a perspective view of the transmissive liquid crystal display element shown above, Fig. 3 is a perspective view of the opalescent plate shown above, FIG. 4 is a perspective view of the same printed sheet. 3...Square hole, 4...Printed sheet, 6...Milk white plate, 7...Square fitting part, 8...Display pattern,
9... Transmissive liquid crystal display element, 11... Lead wire.

Claims (1)

[Claims for Utility Model Registration] (1) Between a printed sheet having holes for light transmission and a transmissive liquid crystal display element attached to the printed sheet with a gap, It has a convex portion that fits into the hole, and the thickness of the protrusion from the print sheet toward the transmissive liquid crystal display element corresponds to the gap when the print sheet is fitted and fixed to the print sheet through the convex portion. A transmission type liquid crystal display device characterized by interposing a formed opalescent plate for diffusion. (2) The transmissive liquid crystal display according to claim 1, wherein the opalescent plate is masked at the outer edge of the surface on the transmissive liquid crystal display element side. (3) The transmissive liquid crystal display element according to claim 1 or 2 of the utility model registration claim, wherein the transmissive liquid crystal display element is provided with a deflection film covering the display pattern portion on the display side surface thereof. display.