Touch panel, electro-optic device, manufacturing method for electro-optic device and electronic device

Abstract

A touch panel includes: a first touch panel substrate having a first surface and having a flexibility; a second touch panel substrate arranged a fixed distance away from the first touch panel substrate via spacers, having a second surface that faces the first surface; a position detecting section formed on the first surface, and detecting a position where the first touch panel substrate is being pressed based on changes in surface acoustic waves generated on the first surface; and a resin film formed on the second surface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view showing a schematic structure of a liquid crystal display device including a touch panel according to a first embodiment.

FIG. 2 is a plan view showing a schematic structure of an inner surface side of a thin substrate of a touch panel.

FIG. 3 is a graph showing a relationship between a Young's modulus of a resin film and a resin strength attenuation factor.

FIG. 4 is a cross-sectional view showing a state when a user presses a touch panel with a finger.

FIG. 5 is a graph showing an example of an envelope waveform of a detected surface acoustic wave.

FIG. 6 is a cross-sectional view showing a schematic structure of a liquid crystal display device including a touch panel according to a second embodiment.

FIG. 7 is a perspective view showing a schematic structure of a mobile telephone.

Claims

1. A touch panel comprising: a first touch panel substrate having a first surface and having a flexibility;a second touch panel substrate arranged a fixed distance away from the first touch panel substrate via spacers, having a second surface that faces the first surface;a position detecting section formed on the first surface, and detecting a position where the first touch panel substrate is being pressed based on changes in surface acoustic waves generated on the first surface; anda resin film formed on the second surface.

2. The touch panel according to claim 1, wherein a Young's modulus of the resin film is less than or equal to 4 GPa.

3. The touch panel according to claim 1, wherein a material of the resin film is polyethylene.

4. An electro-optic device comprising an electro-optic panel and a touch panel, wherein the electro-optic panel includes: a first electro-optic panel substrate;a second electro-optic panel substrate arranged so as to face to the first electro-optic panel substrate; andan electro-optic substance sandwiched between the first electro-optic panel substrate and the second electro-optic panel substrate, andthe touch panel includes: a second touch panel substrate arranged on an opposite surface of the first electro-optic panel substrate with respect to the electro-optic substance, and having a second surface;a first touch panel substrate arranged a fixed distance away from the second touch panel substrate via spacers, having a first surface that faces the second surface and having a flexibility;a position detecting section formed on the first surface, and detecting a position where the first touch panel substrate is being pressed based on changes in surface acoustic waves generated on the first surface; anda resin film formed on the second surface.

5. The electro-optic device according to claim 4, further comprising: a first polarization plate arranged on an opposite surface with respect to the first surface; anda second polarization plate arranged on an opposite surface of the second electro-optic panel substrate with respect to the electro-optic substance, whereinthe electro-optic panel is a liquid crystal panel, and the electro-optic substance is a liquid crystal layer.

6. The electro-optic device according to claim 4, wherein a Young's modulus of the resin film is less than a Young's modulus of the first touch panel substrate and the first polarization plate.

7. An electronic device comprising the electro-optic device according to claim 4.

8. An electro-optic device comprising an electro-optic panel and a touch panel, wherein the electro-optic panel includes: a first electro-optic panel substrate, having a second surface;a second electro-optic panel substrate arranged so as to face to the first electro-optic panel substrate; andan electro-optic substance sandwiched between the first electro-optic panel substrate and the second electro-optic panel substrate, and the touch panel includes:a touch panel substrate arranged a fixed distance away from the first electro-optic panel substrate via spacers, and having a first surface that faces the second surface and having a flexibility;a position detecting section formed on the first surface, and detecting a position where the touch panel substrate is being pressed based on changes in surface acoustic waves generated on the first surface; anda resin film formed on the second surface.

9. The electro-optic device according to claim 8, further comprising: a first polarization plate arranged on an opposite surface with respect to the first surface; anda second polarization plate arranged on an opposite surface of the second electro-optic panel substrate with respect to the electro-optic substance, whereinthe electro-optic panel is a liquid crystal panel, and the electro-optic substance is a liquid crystal layer.

10. The electro-optic device according to claim 8, wherein a Young's modulus of the resin film is less than a Young's modulus of the first touch panel substrate and the first polarization plate.

11. An electronic device comprising the electro-optic device according to claim 8.

12. A manufacturing method for an electro-optic device comprising: preparing a pair of substrates;affixing the substrates so as to sandwich an electro-optic substance therebetween, thereby forming an electro-optic substance substrate body including a plurality of electro-optic panels;coating one surface of the electro-optic substance substrate body with a resin film material using a liquid phase method, and drying the resin film material, thereby forming a resin film;after the forming of the resin film, dividing the electro-optic substance substrate body so as to obtain the individualized electro-optic panels, each of which has the resin film; andarranging a touch panel via the spacers on the resin film of the on the electro-optic panel.