Liquid crystal device

Abstract

A liquid crystal device of the invention includes: a pixel portion including a liquid crystal pixel portion and a capacitor element which are changed into light permeation state corresponding to the display signal through displaying selection signal; a optical sensor portion including a photoelectric conversion element for generating electric current by supplied second voltage, selecting signal and changing into readable optical signal state through optical sensor, resetting the optical signal to the first voltage through the reset signal; a light quantity adjusting portion for adjusting input light quantity of optical sensor, having a liquid crystal pixel portion and a capacitor element which are changed into light permeation state corresponding to the display signal through displaying selection signal; display selection signal lines for supplying display selection signal and reset signal; capacitor potential wires for supplying constant potential to capacitor elements; first power lines for supplying the first voltage; second power lines for supplying the second power lines; and optical sensor line selection signal wire for supplying selection signal to optical sensor.

Description

technical field [0001] The present invention relates to the technical field of a liquid crystal device with a light detection function for determining the position of a pointing object such as a finger and detecting an area by detecting external light, and electronic equipment having such a liquid crystal device. Background technique [0002] In a liquid crystal device widely used as a display device of electronic equipment, it has been proposed to dispose a photosensor on each of a plurality of pixel units, or on each group of an arbitrary number of pixel units, so that A liquid crystal device having a so-called touch panel function, which performs image display by light transmitted through the pixel unit, and performs information input to the liquid crystal device by pointing an object such as a finger. In such a liquid crystal device, information can be input to the liquid crystal device by detecting that a pointing object such as a finger or a pointing member touches or ...

AI Technical Summary

Problems solved by technology

[0008] However, in this liquid crystal device, the portion including the white image and In the case of an image of a black image portion, it becomes difficult to determine which image portion of the white image portion and the black image portion contains the image portion of the pointing object, and the pointing is determined by recognizing the image portion of the pointing object as another image portion Technical issues such as difficult positioning of objects

[0009] In particular, when the image data including the image portion of the pointing object has a gradation such that the image portion of the pointing object can be recognized, the image portion of the pointing object can also be recognized by performing various arithmetic processing on the image data. For other parts, but when the light quantity outside the light quantity detectable range of the photosensor is detected, the image part of the pointing object cannot be obtained from the image data including the gradation data that can be determined by arithmetic processing

[0010] Here, similar to imaging devices such as cameras having a mechanical aperture mechanism and a shutter structure in the optical system, it is also considered to provide an aperture mechanism and a shutter structure on each photosensor part, but to ensure light reception at the photosensor part along the optical path of the incident light. The space for installing the aperture mechanism etc. on the side becomes difficult

In particular, in such a liquid crystal device, since the photosensor part needs to be provided on the display area of ​​the liquid crystal device, the display performance of the liquid crystal device, more specifically, the opening through which the display light is substantially provided when an image is displayed in the display area is provided. The area is greatly narrowed, making it difficult to secure space for setting the aperture mechanism, etc.

[0011] In addition, in an image sensor that detects an image of an object to be inspected, similar to a liquid crystal device having a touch panel function, there is a technical problem that it becomes difficult to recognize an image portion of an object to be inspected as another image portion and perform detection.

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