JPS59165321A - Keyboard - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a keyboard that is made of a transparent material and has a display element such as a liquid crystal display section for displaying key functions on the bottom surface.

Conventionally, this type of keyboard is shown in Figures 1(a) and t.
The one shown in Figure J1 (b) is generally provided.

The configuration of the conventional keyboard will be described below with reference to FIG.

11 and 12 are 7 lexiple transparent circuit boards, and a thin metal film such as gold or indium tin oxide is formed on one side of a transparent sheet made of a polymeric material such as polyester by a method such as vapor deposition. A predetermined switch pattern is formed by etching. The flexible transparent circuit board 11 (hereinafter referred to as the upper board) and the flexible transparent circuit board 2 (hereinafter referred to as the lower board)
The transparent keyboard part is constructed by fixing the switch pattern surfaces to each other with an adhesive (6) so that they face each other with a predetermined minute interval. The liquid crystal (not shown) is integrated with the above-mentioned transparent keyboard section by attaching the upper glass 15 and the upper surface of the plate 14 to the lower surface of the lower substrate 12.

FIG. 1(b) is a plan view of a conventional keyboard constructed as described above. Here, the keyboard terminal is on the upper board 1
11 and the outer edge of the lower substrate 12 (the outer part of the frame formed by the adhesive 16 forming the seal spacer).

In conventional keyboards like this, a film with a switch pattern is pasted on top of the upper polarizing plate, but because of the large surface area, it takes a lot of man-hours to paste, and defects such as air bubbles and dust occur. It was easy to do, and yields were significantly lowered.

SUMMARY OF THE INVENTION An object of the present invention is to provide a keyboard that eliminates the above-mentioned drawbacks.

In other words, the keyboard of the present invention has a lower part of a transparent keyboard, which is formed by disposing two transparent sheets with a small distance therebetween, and forming key switches in a metal thin film or the like on opposing surfaces of the transparent sheets. A keyboard in which a liquid crystal display section is arranged, characterized in that the lower sheet of the two transparent sheets is a polarizing plate, and the polarizing plate also has about 20% of the upper polarizing plate of the liquid crystal display section. have.

The keyboard of the present invention will be explained below with reference to the drawings.

24 is an upper polarizing plate, 25 is a lower polarizing plate, 26 is a light diffusing and reflecting member, 27 is a lower switch (turn), 28 is an upper switch pattern, 28 is an upper film, 29 is an ink connector, 2
0 is a seal spacer. The liquid crystal cell 21 can use a twisted nematic mode, and in this case, the upper polarizing plate 2
4 and the lower polarizing plate 25 are arranged in a cross-nicol configuration. FIG. 3 shows a concrete example of using this key fod as a calculator. 3
1 is the main body of the calculator, 32 is its display section, and 66 is a keyboard. In this calculator, when the power switch is turned on, letters or characters indicating the function of the key switch are displayed on the transparent keyboard part of the above-mentioned crystal display part corresponding to each key switch, and
The letter or character is displayed through the transparent keyboard section. Figure 3 (1) shows the case where numbers and symbols for four arithmetic operations are displayed on the liquid crystal display, and Figure 3 (b)
a This is a case where various function symbols are displayed. Switching between the numerical mode and the function mode can be performed using a slide switch (not shown) or the like, or a key for switching may be provided on the keyboard section 66. Further, two types of characters can be displayed on the keyboard section 63 by using a two-layer liquid crystal display section or by using a dot matrix liquid crystal display section.

The keyboard of the present invention can reduce the number of parts, reduce the number of man-hours by omitting pasting once, and prevent a decrease in yield due to pasting.
Became.

[Brief explanation of the drawing]

FIG. 1(a) is a sectional view of a conventional key fod, and FIG. 1(b) is a plan view thereof. FIG. 2 is a sectional view of the keyboard of the present invention. Figure 3(a) and Figure 3(b)
FIG. 1 is an explanatory diagram of an aspect in which the keyboard of the present invention is used in a calculator. 21... Liquid crystal cell 22. 23... Electrode plate 24... Upper polarizing plate 25... Lower polarizing plate 26...
Fist light diffuser reflection member 27...Lower switch pattern 28...-Upper switch pattern 29@・-Interconnector 20@@Φ Sea Spacer crusher

Claims (1)

[Claims] A keyboard in which a display section is disposed at the bottom of a transparent keyboard comprising two transparent sheets arranged with a small distance therebetween and key switches formed in a metal thin film or the like on mutually opposing surfaces of the transparent sheets, A keyboard that also has a dual role.