Image pick-up device and display device

Abstract

An image pick-up device includes: a photoelectric converter (5) which converts light into electric charge; an accumulation capacitor (6) which accumulates charge converted by the photoelectric conversion element(s); reset means (7) for discharging electric charge from the accumulation capacitor (6); and an amplification thin film transistor (8) which receives and amplifies electric charge accumulated in the accumulation capacitor (6) and outputs the amplified charge. The amplification thin film transistor (8) forms a source follower circuit.

Description

Technical field [0001] The present invention relates to an image pickup device and a display device including a photoelectric conversion element. Background technique [0002] Although photoelectric conversion elements such as CCD (Charge Coupled Device) sensors and CMOS (Complementary Metal Oxide Semiconductor) sensors are generally considered to be image pickup devices that pick up images, thin film transistors (hereinafter referred to as “thin film transistors”) have been proposed in recent years. (Referred to as "TFT") combined with a capacitor or the like to function as a photoelectric conversion element. As an example of such an image pickup device, for example, there is an image pickup device that includes a liquid crystal display element, a TFT serving as a photoelectric conversion element for each pixel arranged in a matrix, and the like, and also includes a backlight or front light used as a light source. . The image pickup device is configured so that information input...

AI Technical Summary

Problems solved by technology

[0003] When realizing the image pickup device of the display function-integrated type described above using the well-known low-temperature polysilicon technology, it is considered that it is difficult to obtain an accurate output value because it is impossible to ignore the signal attenuation caused by the parasitic capacitance in the panel

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