JPH0720993A - Transparent touch panel - Google Patents

Abstract

PURPOSE:To prevent a Newton ring from being generated on the surface of a touch panel irrespective of the heterogeneity, strain, etc., of a transparent panel. CONSTITUTION:The transparent touch panel consists of an upper part electrode panel 10 and a lower part electrode panel 20 which are constituted integrally with a display device by being mounted on the top surface of the display device, and, the upper part electrode panel has an upper part substrate 14 made of a transparent material having a transparent resistance sheet 11 stuck onto the under surface and the lower part electrode panel has a lower substrate 24 made of a transparent material having a transparent resistance sheet 21 stuck onto the top surface. The resistance sheets 21 are arranged facing each other at an interval. And, the resistance sheets 21 are bought into contact with each other to detect an input position and nonglare working 16 or 26 is performed for at least one of the opposed resistance sheets 21 of the transparent touch panel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent touch panel in which a display device and an input panel are integrated, and is used for a display device such as a CRT for computer terminals and a liquid crystal display device.

[0002]

2. Description of the Related Art In recent years, with the progress of information processing equipment, input / output devices used for exchanging information between humans and machines have been remarkably spread, and CRTs for computer terminals, liquid crystal display devices, etc. are used as input devices. A transparent touch panel is placed on the display device and is integrated. This touch panel allows input and output on the same screen, displays necessary items on a display device, and allows the touch panel (input device) to input while viewing the display. Usually, these touch panels are used in, for example, a bank terminal and the like, and the surface of the touch panel is directly touched with a finger to input.

As shown in FIG. 2, this touch panel has an upper substrate 14 made of glass or a transparent film.
An upper electrode panel (movable electrode panel) 10 is formed by depositing a resistance sheet 11 made of a transparent ITO (Indium Tin Oxide InO ₃ SnO ₂ ) conductive film on the lower surface of the substrate, and is made of glass or a transparent film. A resistance sheet 21 made of the same transparent ITO conductive film as that described above is provided on the upper surface of the lower substrate 24, and a dot spacer 30 made of a minute protrusion which is a transparent insulating material is provided on the conductive film 21. Are arranged at intervals to form a lower electrode panel (fixed electrode panel) 20. The dot spacers 30 are provided to prevent the resistance sheet 11 attached to the upper electrode panel 10 and the resistance sheet 21 attached to the lower electrode panel 20 from directly contacting each other. A transparent protective film 15 is provided on the upper surface of the upper electrode panel 10 to protect the electrode panel.

Further, as shown in FIG. 3, electrode terminals 12 and 13 are formed in parallel with each other in the horizontal direction on both upper and lower ends of the resistance sheet 11 of the upper electrode panel 10.
Lead wires 14 and 15 are connected to 2 and 13. Further, electrode terminals 22 and 23 are formed in parallel in the front-rear direction on the left and right ends of the resistance sheet 21 of the lower electrode panel 20, and lead wires 24 and 25 are connected to the electrode terminals 22 and 23.

The upper electrode panel 10 and the lower electrode panel 20 configured as described above are bonded together with an adhesive or the like to form the transparent touch panel 1. This transparent touch panel 1 is a CRT or L as shown in FIG.
The display device 2 made of a CD (liquid crystal display device) or the like is stacked on top of the display device 2 to form an integral structure, and a necessary screen is displayed on the display device 2, and the user touches the screen while viewing the screen through the transparent touch panel 1 to input data. It becomes a display input device that can do.

[0006]

However, in these transparent touch panels, since the upper and lower two electrode panels are arranged with a space therebetween, the inhomogeneity or distortion of each electrode panel itself causes Alternatively, due to relative distortion of the two electrode panels or the like, equal-thickness interference fringes as shown in FIG. 4, so-called Newton's rings, are generated on the surface, which causes a problem that the display screen becomes difficult to see. Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a touch panel in which Newton's rings do not occur.

[0007]

A structural feature of the present invention is that it comprises an upper electrode panel and a lower electrode panel which are mounted on the upper surface of a display device and integrally formed with the display device. The panel has an upper substrate made of a transparent material having a transparent resistance sheet adhered to a lower surface thereof, and the lower electrode panel has a lower substrate made of a transparent material having a transparent resistance sheet adhered to an upper surface thereof, In the transparent touch panel in which the resistance sheets are arranged to face each other with a gap and the input positions are detected by bringing the resistance sheets into contact with each other, at least one of the opposing resistance sheets is non-glare processed. Is being done.

[0008]

In the present invention configured as described above, since at least one of the opposing resistance sheets is non-glare processed, there is unevenness or distortion of each electrode panel itself. But or 2
Even if there are relative distortions of the electrode panels, the incident light is scattered by the non-glare treated surface, so it is possible to prevent the occurrence of uniform thickness interference fringes such as Newton's ring, and the display screen It has the excellent effect of making it easier to see.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an embodiment of the touch panel of the present invention. In FIG. 1, an upper electrode panel (movable electrode) provided by depositing a resistance sheet 11 made of a transparent ITO (Indium Tin Oxide InO ₃ SnO ₂ ) conductive film on the lower surface of an upper substrate 14 made of glass or a transparent film. Panel) 10, and a resistance sheet 21 made of a transparent ITO (Indium Tin Oxide InO ₃ SnO ₂ ) conductive film is attached to the upper surface of a lower substrate 24 made of glass or a transparent film. 21
A lower electrode panel (fixed electrode panel) 20 is formed by arranging a large number of dot spacers 30 which are transparent insulating substances and are made of minute protrusions on the upper side with a space therebetween. A transparent protective film 15 is provided on the upper surface of the upper electrode panel 10 to protect the electrode panel.

The lower surface of the resistance sheet 11 of the upper electrode panel 10 or the upper surface of the resistance sheet 21 of the lower electrode panel 20, or the lower surface of the resistance sheet 11 of the upper electrode panel 10 and the upper surface of the resistance sheet 21 of the lower electrode panel 20 are non-glare processed. The surface is roughened by providing fine unevenness on the smooth surface so that light incident on these panels is diffusely reflected. 1A shows an example in which the upper surface of the resistance sheet 21 of the lower electrode panel 20 is subjected to the non-glare processing 26, and FIG. 1B shows the lower surface of the resistance sheet 11 of the upper electrode panel 10 in the non-glare processing 16 It is an example of applying
Further, FIG. 1C shows the lower surface of the resistance sheet 11 of the upper electrode panel 10 and the resistance sheet 21 of the lower electrode panel 20.
An example in which both of the upper surfaces of the non-glare processing 16 and 26 are applied is shown.

Here, the non-glare processing is performed for diffusing specular reflection, and is processing for making a rough surface by providing fine irregularities on a smooth surface, mechanically or chemically. Processing performed on the resistance sheet side of the electrode panel, for example, a method of performing roller processing by facing a rough surface roller, or a method of immersing the electrode panel in a hydrofluoric acid-based aqueous solution to corrode the surface of the resistance sheet, etc. There is.
In this non-glare processing, since the light transmittance may decrease and the display screen may be difficult to see, it is necessary to perform the non-glare processing to the extent that the display screen is not difficult to see.

And, these electrode panels 10 and 20
At both ends, as shown in FIG.
1. Electrode terminals 12 and 13 are formed in parallel with each other in the left-right direction on the upper and lower ends of the resistance sheet 11 of FIG.
Lead wires 14 and 15 are connected to 3. Further, electrode terminals 22 and 23 are formed in parallel in the front-rear direction on the left and right ends of the resistance sheet 21 of the lower electrode panel 20, and lead wires 24 and 25 are connected to the electrode terminals 22 and 23.

Next, the upper electrode panel 10 and the lower electrode panel 20 configured as described above are bonded together with an adhesive or the like to form the transparent touch panel 1. The transparent touch panel 1 is stacked on a display device 2 such as a CRT or an LCD (liquid crystal display device) as shown in FIG. 4 to be integrally formed, and displays a necessary screen on the display device 2 and is transparent. The display input device can be touched with a finger to input while viewing the screen through the touch panel 1.

To explain the effects of the above embodiments, since at least one of the opposing resistance sheets is non-glare processed, even if there is inhomogeneity or distortion of each electrode panel itself, or Even if there is relative distortion between the two electrode panels, the incident light is scattered by the surface that has been subjected to the non-glare treatment, so that it is possible to prevent the occurrence of equal-thickness interference fringes such as Newton's rings, and display screen. Has the excellent effect of making it easier to see.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention, FIG.
Is a view of the lower electrode panel with non-glare processing,
(B) is a diagram in which the upper electrode panel is subjected to non-glare processing, and (c) is a diagram in which both the upper electrode panel and the lower electrode panel are subjected to non-glare processing.

FIG. 2 is a cross-sectional view of a main part of a touch panel.

FIG. 3 is an electrode configuration diagram of a touch panel.

FIG. 4 is a diagram in which a touch panel is integrated with a display device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transparent touch panel, 10 ... Upper electrode (movable electrode) panel, 11 ... Resistive sheet, 14 ... Upper substrate, 15 ... Protective layer, 20 ... Lower electrode (fixed electrode) panel, 21 ... Resistive sheet, 24 ... Lower substrate, 30 ... Dot spacer, 16,
26 ... Non-glare processed layer.

Claims (1)

[Claims] 1. A display device comprising an upper electrode panel and a lower electrode panel which are mounted on the upper surface of the display device and integrally formed with the display device. The upper electrode panel has a lower surface covered with a transparent resistance sheet. It has an upper substrate made of a transparent material,
The lower electrode panel has a lower substrate made of a transparent material having a transparent resistance sheet adhered on the upper surface, the resistance sheets are arranged facing each other with a gap, and the resistance sheets are brought into contact with each other. In a transparent touch panel for detecting an input position, at least one of the opposing resistance sheets is non-glare processed.