Display device, viewing angle control device, and electronic device
First Claim
Patent Images
1. A display device, comprising:
- an image display device arranged to display an image; and
a display switching device arranged to electrically switch the image displayed on the image display device, between (i) a single image display mode in which the image is viewable in any of a front direction and a plurality of oblique directions with respect to the image display device, and (ii) a plural image display mode in which the image is viewable in the front direction but not in the plurality of oblique directions, the image display device being provided on a front side of the display device;
whereinthe display switching device is arranged to keep a liquid crystal layer between a pair of substrates and includes a front-side first transparent conductive film arranged to apply a voltage to the liquid crystal layer and a back-side second transparent conductive film, andthe display device further includes a position detection device arranged to detect, when a contacting object contacts a front surface of the display switching device, a contacting position of the contacting object by detecting currents flowing from plural parts of the first transparent conductive film.
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Abstract
A first transparent electrode film, which is a component of a SW-LCD for viewing angle control, is used as a touch panel. When a contacting object contacts the surface of the first transparent electrode film, a position detector detects currents flowing from plural parts of the first transparent electrode film so as to detect the contacting position of the contacting object, with reference to the detection result. With this, it is possible to provide a built-in touch sensor display device which is thin, lightweight, and low-cost, a viewing angle control device, and an electronic device.
60 Citations
14 Claims
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1. A display device, comprising:
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an image display device arranged to display an image; and a display switching device arranged to electrically switch the image displayed on the image display device, between (i) a single image display mode in which the image is viewable in any of a front direction and a plurality of oblique directions with respect to the image display device, and (ii) a plural image display mode in which the image is viewable in the front direction but not in the plurality of oblique directions, the image display device being provided on a front side of the display device;
whereinthe display switching device is arranged to keep a liquid crystal layer between a pair of substrates and includes a front-side first transparent conductive film arranged to apply a voltage to the liquid crystal layer and a back-side second transparent conductive film, and the display device further includes a position detection device arranged to detect, when a contacting object contacts a front surface of the display switching device, a contacting position of the contacting object by detecting currents flowing from plural parts of the first transparent conductive film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13)
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12. A viewing angle control device which controls a viewing angle of incident light and outputs the incident light, and which also detects a contacting position of a contacting object on a surface of a device, the viewing angle control device comprising:
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a liquid crystal element; a linear polarization plate provided on the liquid crystal element; and a position detection element, wherein the liquid crystal element includes an opposing transparent electrode, when the contacting object contacts, the position detection element detecting the contacting position of the contacting object by detecting currents flowing from plural portions of the opposing transparent electrode, a longitudinal axis direction of liquid crystal molecules in the liquid crystal element being in parallel to a plane formed by (i) a direction of either a transmission axis or an absorption axis of the linear polarization plate and (ii) a traveling direction of light, the liquid crystal molecules being either;
in parallel to or orthogonal to the traveling direction of the light;
or tilted with respect to the traveling direction of the light, andthe viewing angle control device is arranged to switch the viewing angle of the incident light between (i) a wide angle viewing mode in which the incident light is viewable in any direction, and (ii) a narrow angle viewing mode in which the incident light is viewable only in a specific direction such that at least a portion of the incident light is not viewable in a direction different from the specific direction. - View Dependent Claims (14)
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Specification