Image reader device, and semiconductor device

Abstract

The invention provides an image reader device, and semiconductor device. Each of a plurality of image reader chips included in an image reader device includes: a readout circuit that reads out a pixelsignal output from a pixel portion; a transfer interconnect; an output circuit that outputs the pixel signal; a capacitor that is selectively connected between the transfer interconnect and the output circuit; and a constant voltage circuit. The constant voltage circuit is selectively connected to a first terminal of the capacitor via the output circuit.

Description

technical field

[0001] The present invention relates to an image reading device and a semiconductor device. Background technique

[0002] An image reading device (scanner) using a contact image sensor, a copier, a multi-function printer, etc., in which a printing function is added to the image reading device have been developed. As a contact image sensor used in an image reading device, a structure using a photodiode provided on a semiconductor substrate is adopted. Image reading devices such as scanners generally have a plurality of sensor chips (image reading chips) in which a large number of pixel units having one or more photodiodes are arranged in one direction.

[0003] For example, Patent Document 1 discloses a photoelectric conversion device and a multi-chip sensor device connected with a plurality of photoelectric conversion devices, wherein the photoelectric conversion device includes a photoelectric element, a storage capacitance element for accumulating charges ...

Examples

no. 2 approach

[0193]Hereinafter, with regard to the multifunction peripheral 1 (multifunction device) to which the image reading device of the second embodiment is applied, the same reference numerals are given to the same components as those in the first embodiment, and overlapping descriptions with the first embodiment will be omitted. Differences from the first embodiment will be described.

[0194] Since the structure of the multifunction peripheral 1 to which the image reading device of the second embodiment is applied is different from that of the first embodiment ( Figure 1 to Figure 4 ) are the same, so their illustrations and descriptions are omitted. Furthermore, since the functional configuration diagram of the scanner unit 3 of the second embodiment ( Figure 5 ) is the same as the first embodiment, so its illustration and description are omitted. In addition, since the functional configuration diagram of the image reading chip 415 of the second embodiment ( Image 6 ) is th...

technical field

[0001] The present invention relates to an image reading device and a semiconductor device. Background technique

[0002] An image reading device (scanner) using a contact image sensor, a copier, a multi-function printer, etc., in which a printing function is added to the image reading device have been developed. As a contact image sensor used in an image reading device, a structure using a photodiode provided on a semiconductor substrate is adopted. Image reading devices such as scanners generally have a plurality of sensor chips (image reading chips) in which a large number of pixel units having one or more photodiodes are arranged in one direction.

[0003] For example, Patent Document 1 discloses a photoelectric conversion device and a multi-chip sensor device connected with a plurality of photoelectric conversion devices, wherein the photoelectric conversion device includes a photoelectric element, a storage capacitance element for accumulating charges ...

Examples

no. 2 approach

[0193]Hereinafter, with regard to the multifunction peripheral 1 (multifunction device) to which the image reading device of the second embodiment is applied, the same reference numerals are given to the same components as those in the first embodiment, and overlapping descriptions with the first embodiment will be omitted. Differences from the first embodiment will be described.

[0194] Since the structure of the multifunction peripheral 1 to which the image reading device of the second embodiment is applied is different from that of the first embodiment ( Figure 1 to Figure 4 ) are the same, so their illustrations and descriptions are omitted. Furthermore, since the functional configuration diagram of the scanner unit 3 of the second embodiment ( Figure 5 ) is the same as the first embodiment, so its illustration and description are omitted. In addition, since the functional configuration diagram of the image reading chip 415 of the second embodiment ( Image 6 ) is th...

Images