JPH033028A - Input device - Google Patents

Abstract

PURPOSE:To prevent transparent electrodes from cracking due to sealing and to secure sealing capacity by forming at least one upper/lower connecting electrode between the upper and lower electrodes and forming the combination of a continued seal and uncontinued seals around the upper/lower connecting electrode. CONSTITUTION:The transparent electrodes 3, 4 are formed on the opposite insides of the lower base 1 made of soda glass or borosilicate glass and the upper base 2 using a polyester, polycarbonate, or acrylic film. The combination of the continued seal 6 and the uncontinued seals 7 is formed around the upper/ lower connecting electrode 5 at least one position between the upper and lower electrodes 3, 4. Consequently, the electrodes can be prevented from being cracked and the sealing strength can be secured.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an input device.

[Prior Art 1] In a conventional input device, as shown in FIG. 5, a continuous seal 6 is formed around a vertical conductive electrode 5 provided between an upper substrate 2 and a lower substrate l.

[Problem to be Solved by the Invention 1] When the continuous seal 6 is formed around the upper and lower conductive electrodes 5 as described above, the transparent electrode that is routed across the seal in the transparent electrodes of the upper and lower substrates is will occur. 6th
．． Figure 7 shows an example of the transparent electrode 4 crossing the seal 6.
If the board 2 is deformed during input or for other reasons, strong bending stress will occur at the sealing part, causing cracks 8 and increasing routing resistance or cutting, which may cause input failure during installation. was.

Furthermore, in order to prevent the occurrence of the above-mentioned crack 8, there is a method of eliminating the seal across the transparent electrode. FIG. 4 is an example of this. In this case, the length of the seal 6 around the upper and lower conductive electrodes 5 is insufficient, resulting in insufficient G-song ability, and the upper and lower conductive electrodes 5 are deformed due to input, etc. The conductive electrode 5 is replaced by the transparent electrode 4.
The peeling caused input errors.

The present invention has been made to solve these problems, and its purpose is to provide an input device that reduces the occurrence of cracks caused by the sealing of the transparent electrodes around the upper and lower conductive electrodes, and that also ensures sealing performance.

[Means for Solving the Problems 1] The input device of the present invention has two transparent substrates, upper and lower, and transparent electrodes are formed on the opposing inner surfaces of the substrates. As described above, using upper and lower conductive electrodes, a continuous seal around the upper and lower conductive electrodes,
It is characterized by being formed by combining discontinuous seals.

[Embodiment 1] FIG. 1 is a plan view of this embodiment of the input device of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1. 1 in FIG. 1 is a lower substrate made of soda glass or borosilicate glass. Or, the lower substrate is made of polyester, polycarbonate,
A film such as acrylic was used. 3 is a transparent electrode of the lower substrate, which is an ITO film formed by sputtering or vapor deposition, or C
This is a tin oxide film formed by the VD method. 4 is an ITo film formed by sputtering or vapor deposition on the transparent electrode of the upper substrate. Reference numeral 5 denotes upper and lower conductive electrodes for obtaining electrical continuity between the upper and lower electrodes, and a conductive paste made of a resin such as epoxy or phenoxy mixed with gold or silver filler, or a carbon-based conductive paste was used.

6 is a seal that fixes the upper and lower substrates and the periphery of the conductive agent 5, and a silicon adhesive is used for the seal. 7 is a discontinuous seal according to the present invention, and the same silicone adhesive as in 6 was used.

At this time, 7 is located at the center of the upper substrate electrode 4 and has a length of
The width of the upper substrate electrode 4 was determined.

By forming the discontinuous seal 7 on the upper substrate electrode 4 around the upper and lower conductive electrodes 5 as described above, the seal strength can be maintained without causing cracks in the upper substrate electrode 4 due to stress. As a result, the reliability of the product has been significantly improved.

[Embodiment 2] FIG. 3 is a plan view of the main parts of this embodiment. In this example,
The shape of the discontinuous seal 7 is L-shaped to improve sealing performance.

[Effect of the Invention 1] As described above, according to the present invention, an input device was obtained in which cracking of the electrodes was prevented and sealing strength was ensured.

[Brief explanation of drawings]

FIG. 1 is a plan view of Embodiment 1 of the present invention. FIG. 2 is a sectional view taken along the line A-A in FIG. 1. FIG. 3 is a plan view of main parts of Example 2 of the present invention. FIG. 4 is a diagram showing an example in which a continuous seal inside the conductive adhesive is completely omitted in order to avoid stress cracks in a conventional input device. FIG. 5 is a plan view showing a conventional input device. FIG. 6 shows a stress crack 8 on a continuous seal in a conventional input device.
A diagram showing how this occurs. FIG. 7 is a sectional view taken along the line B-B in FIG. 6. 6 ・ ・ Continuous seal 7 ・ ・ Discontinuous seal 8 ... Cracks that occur on the upper substrate electrode Applicant Seiko Epson Corporation Representative Patent attorney Kizobe Suzuki (and 1 other person) Lower substrate Upper substrate Lower substrate Electrode Top Substrate Electrode Vertical Conductive Electrode Figure 2 Figure 5 Figure 6 Figure 4

Claims (1)

[Claims] In an input device having two transparent substrates, upper and lower, and a transparent conductive film formed on the opposing inner surfaces of the substrates, a vertical conductive electrode is formed at at least one place between the upper and lower electrodes, and the upper and lower conductive electrodes are connected to the upper and lower conductive electrodes. An input device characterized by forming a combination of a continuous seal and a discontinuous seal around the .