JPS61278926A - Display and input device - Google Patents

Abstract

PURPOSE:To simplify constitution, to thin an overall device and to make a display visible and bright by using a substrate member for a keyboard also as a substrate for a display and an input transparent substrate on the upper- most surface also as a deflecting plate for a liquid crystal display. CONSTITUTION:A liquid crystal display body for displaying a keyboard character and a guidance is formed with a lower transparent electrode group 4, which impresses a voltage on a liquid crystal 5 by paring a light irregularly reflecting plate 5, a lower deflecting plate 7, a transparent lower substrate 2 and an upper transparent electrode group 3 through a lower layer, and a transparent upper substrate 1. Thereon an input keyboard part is installed, and the upper substrate 1 serves as the substrate member. An input lower transparent electrode group 10 is disposed on the upper surface of the substrate 1, and a upper deflecting plate 8 where an input upper transparent electrode group 9 is provided and spaced on the lower surface by a spacer 12 is provided as the input upper transparent substrate.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Description of the field to which the invention pertains The present invention uses a 9-display/input device, particularly a liquid crystal display for key character display, etc., and directly displays a key manual mechanism on the liquid crystal display. This invention relates to a display/input device that is installed in a computer.

(2) Description of conventional technology Conventionally, in this type of device, as shown in FIG.
Upper and lower transparent electrode groups 9 are formed to form a key matrix above the liquid crystal display sandwiched between upper and lower polarizing plates.
, 10 is placed on a transparent base member 13. For this reason, a large number of glasses, plastics, etc. are superimposed on two display surfaces, and the overall light transmittance decreases, resulting in a dark display surface and a decrease in one display contrast. Furthermore, the total thickness of the input section and the display section increases.

In the figure, numeral 3 is the upper transparent electrode group of the liquid crystal, 4 is the lower transparent electrode group of the liquid crystal, 5 is the light scattering reflector, 6 is the liquid crystal layer, 7 is the lower polarizing plate, 8 is the upper polarizing plate, and 12 is the spacer. , 13 is a base member for a key matrix, 14 is a transparent upper substrate for input, and 15 is an optical path.

(3) Purpose of the Invention In order to solve the above-mentioned drawbacks, the present invention provides a structure in which a lower transparent electrode group constituting a key matrix is disposed on a liquid crystal display, and the lower transparent electrode group and an upper transparent electrode group constituting the key matrix are arranged on a liquid crystal display. A polarizing plate having an electrode group on the back surface is arranged on the upper surface side of the lower transparent electrode group with a space therebetween.The drawings will be described in detail below.

(4) Explanation of structure and operation of the invention Fig. 1 shows a first embodiment of the present invention, and 1 and 2 are parts constituting a liquid crystal display for displaying keyboard characters, a guidance screen, etc. The upper and lower substrates are made of transparent materials such as glass or plastic, and transparent electrode groups 3 and 4 are formed on opposing surfaces, respectively.

5 is a light scattering reflector, 6 is a liquid crystal layer, and 7 is a lower polarizing plate.

If each of the transparent electrode groups 3.4 is formed into a striped electrode having an X-Y matrix configuration, it becomes possible to display any character, etc. by combining the dot display portions at each intersection, and it is possible to display a free key arrangement. It becomes possible to do so. 10
is a group of input transparent electrodes formed on the upper surface of the upper substrate 1 of the liquid crystal display; 8 is an upper polarizing plate arranged to maintain a certain gap with the upper substrate 1; 9 is a group of transparent electrodes for input formed on the upper surface of the upper substrate 1; This is a group of transparent electrodes for manual use formed on the back surface, and the upper and lower transparent electrode groups 9 and 10 for input constitute a key matrix. Here, the upper and lower input transparent electrode groups 9 and 10 constituting the key matrix may be formed by bundling one or more thin wires made of thin film metal. In addition, transparent electrode groups 9 and 10
The electrode may be a simple stripe-shaped electrode, or may be a vein-shaped electrode with a large area below the pressed part of a finger or the like. Note that 12 is a spacer.

FIG. 2 shows a second embodiment of the present invention, in which 11 is a light emitting member such as electroluminescent (EL),
It is placed at the position of the light scattering reflector plate 5 in FIG.

In addition, in the second embodiment, unlike the first embodiment in which the input light is reflected by the light scattering reflector 5, a light emitting member 11 is provided in place of the light scattering reflector. Yes, there is basically no difference between the two. Therefore, the operation and the like will be explained below using the first embodiment.

When the top surface of the upper polarizing plate 8 corresponding to a desired character or item is pressed with a finger or the like from among the characters or items displayed on the liquid crystal display, the input transparent electrode group 9 of that area is pressed.
．． 10, and an input at the corresponding part is detected.

Despite having such a structure, in the present invention, compared to the conventional example, members such as the base member 13 for the keyboard and the transparent substrate 14 for input can be omitted, and the display of key characters, guidance screens, etc. The display becomes brighter and easier to see, and the overall thickness of the display is reduced, making it possible to realize an inexpensive input device that also serves as a display.

(5) Description of Effects As explained above, according to the present invention, the light transmitting member from the liquid crystal display surface is removed as much as possible.

The entire device can be made thin, and the display of input characters, input items, etc. can be made bright and easy to see, and the entire device can be made thin.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a first embodiment of the device of the present invention. FIG. 2 is a second embodiment of the device of the present invention, and FIG. 3 is a sectional view of a conventional display/input device. DESCRIPTION OF SYMBOLS 1... Upper substrate, 2... Lower substrate, 3... Upper transparent electrode group of liquid crystal, 4... Lower transparent electrode group of liquid crystal, 5... Light scattering reflector, 6... Liquid crystal Layer, 7... Lower polarizing plate, 8...
・Top polarizing plate. 9... Upper transparent electrode group for input, 10... Lower transparent electrode group for input, 11... Light emitting member, 12... Spacer, 1
3... Base member, 14... Transparent upper substrate for input, 15
...light path. Patent applicant Nippon Telegraph and Telephone Corporation (one other person) Representative patent attorney Mori 1) Hiroshi 2 Figure 3 Portal

Claims (1)

[Claims] In an input device that also serves as a display and has a display section that displays characters for a keyboard or figures including a guidance screen using a liquid crystal display, and a key input section arranged on the top side of the display section, the surface of the liquid crystal display A lower transparent electrode group constituting a key matrix is disposed on the lower transparent electrode group, and a polarizing plate having an upper transparent electrode group constituting the key matrix on the back side is disposed on the upper surface side of the lower transparent electrode group with a space between them. display and input device.