JPS59218541A - Input and output device - Google Patents

Abstract

PURPOSE:To prevent the pressure domain that is produced to a liquid crystal display device when a transparent keyboard is operated, by fixing said keyboard to the upper surface side of a spacer and fixing said display device to the lowe r surface side of the spacer respectively. CONSTITUTION:A spacer between a liquid crystal display B' and a transparent keyboard A' is formed at a frame-shaped part 11' having a fixed width and provided inside a holder 11. When the areas of characters A-P displayed on a liquid crystal display keyboard are pushed by fingers, a transparent sheet 8 of the keyboard A' is pushed. Thus the sheet 8 has a contact with a transparent substrate 10. Then the information on a pressed key contact is supplied to the side of a processing circuit by a contact between either one of transparent electrodes x11-x14 and either one of transparent electrodes y11-y14 at the area where a contact is obtained between the sheet 8 and the substrate 10. The pressing power applied to the keyboard A' is applied only to the area around the glass 13 on the display device B via the spacer 11'.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to an input/output device in which input and output are integrated by overlapping a transparent keyboard on the top surface of a liquid crystal display. As shown in FIG. 1, transparent sheets 1 and 2 are arranged with a minute interval between them, and transparent electrodes 7l-X4 made of indium oxide or the like are provided on the opposing surfaces of each transparent sheet 1 and 2, respectively.
yX to y4 are provided, and a transparent sheet 1 and a transparent sheet 2 are adhered to a spacer 3 to form a transparent keyboard portion A.

The liquid crystal display B is formed of an upper glass plate 4 provided with an electrode pattern, a lower glass plate 5, a bipolarizing plate 6, and a reflective plate 7 with a polarizing plate.
A liquid crystal is sealed in between. And transparent keyboard part A
The lower surface of the transparent sheet 2 and the upper surface of the upper polarizing plate 6 of the liquid crystal display section B are adhered to form the liquid crystal display keyboard shown in FIG.

Now, if you press any part of the letters A-P displayed on the LCD keyboard with your finger, the transparent film 1 on the transparent keyboard part A will be pressed and come into contact with the transparent sheet 2, and the transparent electrode of the touched part will be pressed. When any of the transparent electrodes 71 to y1 comes into contact with X1 to x6, the pressed key contact information is input to the processing circuit side. At this time, the upper glass 4 of the liquid crystal display B is also pressed down at the same time, and the distance between the liquid crystal layers between the upper glass 4 and the lower glass 5 changes, causing the displayed characters A and P to be pushed down. A pressurized domain is generated in the character part and its surrounding area, which has the disadvantage that the displayed characters A-P become difficult to see.

(Purpose) The present invention has been made in view of the above points, and is intended to prevent pressure domains generated on the liquid crystal display when operating the transparent keyboard in a people management device in which a liquid crystal display and a transparent keyboard are integrated. The purpose of the present invention is to provide an input/output device that does not impair display quality.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 2 is an exploded view of a liquid crystal display keyboard showing one embodiment of the present invention, and FIG. 3 is a sectional view thereof.

In the figure, 8 is a transparent sheet (for example, a polyester sheet, etc.), and this transparent sheet 8 has a transparent electrode yx using indium oxide etc. to form a key switch.
1M/yla is wired. Reference numeral 10 denotes a transparent substrate using a transparent sheet or a glass plate, and on its upper surface are transparent electrodes Xil for creating a key switch in combination with transparent electrodes y1 to y14 wired on the transparent sheet 8.
'%/ XL4 is wired. 9 is a spacer, and a transparent sheet 8 and a transparent substrate 10 are adhered to this spacer 9 to form a transparent keyboard AI.

The liquid crystal display B' is formed of an upper glass plate 16 provided with an electrode pattern, a lower glass plate 14, an upper polarizing plate 12, and a reflecting plate 15 with a polarizing plate.

Reference numeral 11 denotes a holder for integrally disposing and fixing the transparent keyboard A' on the upper part of the liquid crystal display B', and the transparent keyboard A' is disposed and fixed in the U-shaped part of this holder 11. There is. Further, a liquid crystal display B' is fixed to the lower part of this holder 11. A frame-shaped portion 11' provided in the middle of the holder 11 and having a constant width forms a spacer between the liquid crystal display B' and the transparent keyboard A'. Therefore, when the character A-P displayed on the liquid crystal display keyboard constructed as described above is pressed with a finger or the like, the transparent sheet 8 of the transparent keyboard A' is pressed and comes into contact with the transparent substrate 10. Transparent electrode zxx / of the contact area
%/ By contacting X14 with any one of yli to yl&, information on the pressed key contact point is input to the processing circuit side. At this time, the liquid crystal display B', which is a part of the holder 11 on the lower surface of the transparent substrate 10, and the transparent keyboard A'
A pressing force pressed down by the finger or the like is applied to the spacer 11' through the transparent substrate 10, and this pressing force is applied to the spacer 11' of the liquid crystal display B.
Although the force is applied to the upper glass plate 13, the force is applied only to the periphery of the upper glass 16 through the spacer 11', so the change in the distance between the liquid crystal layer between the upper glass 16 and the lower glass 14 is caused. It is possible to prevent the occurrence of pressurized domains.

(Effects) As explained above, according to the present invention, a transparent keyboard is fixed to the top surface of a spacer provided on one holder,
By fixing a liquid crystal display on the bottom surface of the spacer to form an input/output device such as a liquid crystal display keyboard, the force when the top surface of the transparent keyboard is pressed down with a finger, etc. is released to the area around the liquid crystal display, and the pressure domain can prevent the occurrence of
It is possible to provide an input/output device that does not impair the display quality of the input/output device.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a liquid crystal display keyboard which is a conventional input/output device, FIG. 2 is an exploded view of the liquid crystal display keyboard which is an input/output device of the present invention, and FIG. 6 is a sectional view thereof. A' is a transparent keyboard, B' is a liquid crystal display, 11
is a holder, and 11' is a spacer. Applicant Canon Co., Ltd.

Claims (1)

[Claims] In an input/output device including a transparent keyboard on the top surface of a liquid crystal display, the liquid crystal display and the transparent keyboard are integrally fixed with one holder, and the holder forms a spacer between the liquid crystal display and the transparent keyboard. An input/output device characterized by: