JPS6077229A - Coordinate input detector - Google Patents

Abstract

PURPOSE:To transmit light efficiently and to improve resolution by transmitting light through photoconductive pathes and changing transmission loss of the photoconductive paths by depression of touch input. CONSTITUTION:An optical transmission means is constituted of a variable photoconductive member 13 having meshy photoconductive paths 11, 12. Many Y- coordinate detecting photoconductive paths 11 and many X-coordinate detecting photoconductive paths 12 are arranged on prescribed positions and a finger touch input part is distorted by its depression to change the optical transmission loss so as to be increased. Namely, optical sensor means consisting of a projector 14 and a photodetector 15 respectively are arranged on the peripheral part of an X-Y coordinate screen formed by a flexible plate-like photoconductive member 13 and the change of light projected from the X and Y axes projectors 14 in the arrow directions is detected by the respective couple of the photodetectors 15 to detect the coordinate position. Therefore, the detection is executed by the light shielding action of finger touch.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a coordinate input detection device, and more particularly to a finger touch input detection 1+j device that fully utilizes an optical sensor.

BACKGROUND ART Conventionally, it has been known to utilize light and sound as a see-through type finger touch input device in which the entire coordinate detection surface is placed on a display screen.

In this method, an optical scanner is placed outside a predetermined screen frame, and by inserting a fingertip into the space within the frame, all coordinates of that point are detected. For example, as shown in Figure 1, there is a screen (1) on the X-axis and a light-emitting element array for projecting light (2) on the Y-axis.
t3) Photodetector element for total light reception (4,) (5)
and are arranged facing each other. Such a see-through type finger touch input device detects the touch force of the fingertip (6) with its X-Y coordinate full light emitting/light receiving type optical sensor device, and is known as a so-called touch sensor. . In this type of device, the fingertip (6) completely blocks the infrared light from the light-emitting element, for example, the infrared light-emitting diode, as shown by the arrow in Figure 1. To prevent malfunction caused by raising the placement interval,
The sequential driving sound of only one set of opposing elements must be suppressed. Furthermore, increasing the resolution by 1 is limited by the dimensions of the optical sensor device and the use of a number of parts proportional to the resolution, which may lead to a corresponding increase in the weight consumption.

DISCLOSURE OF THE INVENTION Accordingly, the present invention, as proposed above, is directed to a new and improved optical coordinate input and detection device capable of increasing the overall efficiency of light propagation and improving resolution.

According to the present invention, there is disclosed an optical coordinate input detection device in which light propagation is performed by a planned optical path and takes full advantage of the fact that the propagation loss of the optical path changes with the pressure of a touch input. Specifically, it includes a flexible light guide member in which several light guide paths extending along the X-axis and Y-axis are formed, a light sensor means in which a light emitter and a light receiver are all arranged on both sides of each light guide path, and a A coordinate input detection device is provided which includes a mounting base that maintains a predetermined relationship 1tfK with the light guide in a state of full light propagation.

Here, the direct or indirect touch input to the flexible light guiding member is expressed as a change in the amount of increase in the light propagation loss of the light guiding path in the corresponding portion that occurs in response to the total touch suppression of the x-y coordinate value of the touched portion. Detect with. In other words, by using the light guide as a medium for total light propagation, the efficiency is significantly improved compared to the conventional space propagation method, and all optical system parts such as lenses for adjusting the optical axis can be omitted. In addition, the resolution can be improved by making the light guide path relatively thin so that the distance between the light guide paths is approximately the same as that of the light guide path. Preferably a large number of light guide paths along the X and Y axes? It is formed on the same plane as a planar flexible light guiding part. Furthermore, the protective layer of the film, which is disposed at a predetermined position on the mounting base and is fully elastically collapsed on the touch input side, enables stable touch input operations.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with full view of the drawings.

FIGS. 2 and 3 show all the main parts of the coordinate input detection device according to the present invention, and mainly show the screen space in the conventional example shown in FIG. An important feature of the present invention is that, as shown in the enlarged plan view of FIG. The reason for this is that a large number of Y-coordinate detection light guides (one and a large number of In other words, the periphery of the X-Y coordinate screen formed by the flexible planar light guiding member (1"l) is
14) and a light receiver (15) are arranged, and each of the X-axis and Y +li+I+ emitters ('4
) to each pair of light receivers (l!9) to detect the Fi3 target M.

FIG. 3 is a partially fully sectional f cross-sectional view of the input screen of the present invention,
The finger touch input part (1'9) shows the change.Here, the input screen has a mesh-shaped guide film, which is a feature of the present invention, between the mounting base (+7) and the input side film protective layer (river).
S phase (13) is composed of all intervening layers and has translucency.]
The base body (17) makes it possible to see through the shape and also allows the guide.
/l, member 03) A protective layer that completely collapses elastically while maintaining all of the light guide paths along the predetermined X-Y axes (1 refers to the entire stable surface of the touch input surface) In other words, the input part (16) by the finger touch input is stably deformed by the suppression, and the light guide path CI+) (I
All predetermined portions of f are simultaneously strained and deformed to increase the total optical propagation loss. Such an increase in loss is detected by the optical sensor means, thereby detecting the coordinate point total input signal of the input portion (15). This detection is similar to the light shielding effect caused by a finger touch in FIG. 1, and does not require any special explanation.

In the configuration of the present invention, the light propagation path is the light guide path (Ill ()
→ is more precisely limited so that no scissoring action occurs and the mutual spacing of the light guides (10 or +2) can be sandwiched without mutual interference, thereby improving the resolution. This is an extremely important effect that cannot be expected with other methods, and it also makes it possible to easily adjust the optical axis.In addition to converging and constantly emitting light from a single light source on the side of the split projector, in the case of individual light projecting, scanning It can also be driven.

[Brief explanation of drawings]

FIG. 3 is a plan view of the υ section of the coordinate input detection device using the flexible light guide f%, and FIG. 3 shows the main part 14 of the device in FIG.
This is Figure 11. (1li Y I!l・wa1゛Filling optical path for detection (1・χ
Shimura' detection + IIp optical path (13) Flexible light guide member (14) Throwing convex bamboo S (1 light receiver (+6) Manual power γ?12 minutes

Claims (1)

[Claims] 1.) A flexible light guide member that extends along the X and Y axes to form a mesh-like light guide path, with a light emitter on one end of each axis of the light guide and a light receiver on the other end. and a mounting base for holding the flexible light guide member in a predetermined position in a state where the light guide member is fully propagated,
When a touch input is made to the flexible light guide member, W and propagation loss of the light guide path are completely changed according to the pressure applied to the touch part, and C is changed (?). A coordinate input detection device characterized in that detection is performed by the optical means.