JPS59105222A - Liquid crystal display keyboard - Google Patents

Abstract

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

Description

TECHNICAL FIELD The present invention relates to a liquid crystal display keyboard, and more particularly to a liquid crystal display keyboard having a transparent keyboard on the top surface of a liquid crystal display.

Prior Art A conventional keyboard of this type was constructed as shown in FIGS. 1 and 2.

1 and 2, the reference numeral 1 indicates a liquid crystal display. A polarizing plate 2 is adhesively fixed to the upper surface of the liquid crystal display 1, and a transparent conductive film 3 is adhered to the upper surface of the polarizing plate 2. . A striped electrode 4 is formed on the upper surface of this transparent conductive film 3. This electrode 4 is a transparent electrode formed by forming indium oxide or the like over the entire surface of the transparent conductive film 3 by sputtering or vacuum deposition, and then etching the film.

A spacer 5 is arranged to surround the polarizing plate 2 and the transparent conductive film 3, and a transparent conductive film 6 is attached to the upper end surface of the spacer 5. Striped electrodes 7 are formed on the lower surface of the transparent conductive film 6 and are perpendicular to the transparent electrodes 4 . This electrode 7 is also a transparent electrode.

Due to the presence of the spacer 5, the transparent conductive film 6 and the transparent electrode 7 located on the upper side are arranged at a predetermined distance from the transparent conductive film 3 and the transparent electrode 4 located on the lower side.

As shown in FIG. 2, key names A-P are displayed on the liquid crystal display 1 at the intersections of the upper and lower transparent electrodes 5.7.

Based on this structure, manual keying is performed by pressing the key names A-P with a finger or the like and bringing the transparent electrodes 4 and 7 into contact with each other.

To manufacture a liquid crystal display keyboard having such a structure, a polarizing plate 2 is adhered to the top surface of the liquid crystal display 1, and a transparent conductive film 3 is placed on the polarizing plate 2 so that the key name A- The transparent electrode 4 must be aligned and bonded to P.

Furthermore, after adhering the spacer 5 and aligning the transparent conductive film 6 to the spacer 5 with the key names A-P of the liquid crystal display 1, it is necessary to adhere the transparent conductive film 6 to the spacer 5.

As a result, there are disadvantages in that the number of parts is large and the manufacturing process is extremely complicated.

Purpose The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional keyboard, and an object of the present invention is to provide a liquid crystal display keyboard with a reduced number of parts, a simplified structure, and a significantly shortened manufacturing process. .

Figures 3 to 5 illustrate one embodiment of the present invention.
In the drawings, the same or corresponding parts as in FIGS. 1 and 2 are denoted by the same reference numerals, and their explanations will be omitted.

In this embodiment, a striped transparent electrode 4 is directly formed on the upper surface of the liquid crystal display 1, and a polarizing plate 8 is fixed at a predetermined distance via a spacer 5.

As shown in an enlarged view in FIG. 4, this polarizing plate 8 has a polarizing film 9 in its center, and protective films 10 and 11 are adhered to the upper and lower surfaces of the polarizing film 9. A striped transparent electrode 12 is formed on the lower surface of the film 11 so as to be perpendicular to the transparent electrode 4 . This transparent electrode 12 is also formed in the same manner as the conventional method described above.

At the intersection of the transparent electrodes 4 and 12, the key name PERSON to P is still displayed as shown in FIG.

If such a structure is adopted, the lower transparent electrode 4 is formed directly on the liquid crystal display 1, and the polarizing plate itself is used as a conventional transparent conductive film, so the structure can be extremely simplified. This eliminates the need for two transparent conductive films as in the past.

Therefore, the structure is extremely simplified, and a liquid crystal display keyboard that is easy to manufacture and inexpensive can be obtained.

Effects As is clear from the above explanation, according to the present invention, a transparent electrode is formed at the top and front of a liquid crystal display, and a polarizing plate is formed on which transparent electrodes are formed at a predetermined interval above the transparent electrode. By adopting a structure in which the parts are arranged, it is possible to significantly reduce the number of parts and obtain a liquid crystal display keyboard that is simple in structure and easy to manufacture.

[Brief explanation of drawings]

Figures 1 and 2 are a partially longitudinal side view and a perspective view illustrating a conventional structure, Figure 3 is a tanning diagram, and Figure 5 is a partially longitudinal side view illustrating an embodiment of the present invention. , FIG. 4 is a side view illustrating the structure of the polarizing plate, and FIG. 5 is a perspective view. 1... Liquid crystal display 4, 12... Transparent electrode 5.
...Spacer 8...Polarizing plate 9...Polarizing film
10.11...Protective film Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In a liquid crystal display keyboard having a transparent keyboard section above the liquid crystal display, a transparent electrode is formed directly above the liquid crystal display, and a polarizing plate on which the transparent electrode is formed is placed at a predetermined distance from the transparent electrode. A liquid crystal display keyboard characterized by: