Semiconductor optical-reading device

• US 5,045,686 A
• Filed: 03/06/1990
• Issued: 09/03/1991
• Est. Priority Date: 11/20/1984
• Status: Expired due to Term

• Current Assignee: Seiko Instruments Incorporated (Seiko Group)
• Original Assignee: Seiko Instruments Incorporated (Seiko Group)
• Inventors: Iwanami, Eiichi, Kawahara Yukito, Mukainakano, Hiroshi
• Primary Examiner(s): Nelms, David C.
• Application Number:
  US07/489,452
• Time in Patent Office: 546 Days
• Field of Search: 250/208.1, 250/211 R, 250/211 J, 358/213.22, 358/213.23, 358/213.28, 357/30 H
• US Class Current: 250/208.1
• CPC Class Codes: H01L 27/14681 Bipolar transistor imagers
• CPC Class Codes: H04N 1/031 the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors
• CPC Class Codes: H04N 1/1906 Arrangements for performing substitution scanning for a defective element
• CPC Class Codes: H04N 1/193 using electrically scanned linear arrays , e.g. linear CCD arrays
• CPC Class Codes: H04N 1/40056 Circuits for driving or energising particular reading heads or original illumination means H04N1/401, H04N1/407 take precedence

Abstract

A semiconductor reading device comprises an insulated substrate and a plurality of integrated circuit reading chips disposed on the substrate. Each reading chip comprises a semiconductor substrate containing thereon a plurality of bipolar phototransistors which are responsive to incident light for producing video signals. The phototransistors are formed in the surface of the semiconductor substrate and are equidistantly spaced from one another in a longitudinal direction of the semiconductor substrate. A plurality of signal transmitting elements in the form of MOS transistor are connected to respective ones of the phototransistors and are switchable between a conducting state to transmit therethrough the video signal from its corresponding phototransistor and a non-conducting state. A multi-stage shift register sequentially switches the signal transmitting elements from the non-conducting state to the conducting state to sequentially read out the video signals from the phototransistors. The reading chips are spaced from one another in the longitudinal direction of the semiconductor substrate such that the two endmost phototransistors, which are adjacent each other on two adjacent reading chips, are spaced apart a distance equal to the equidistant spacing between the phototransistors on the reading chips to thereby define a longitudinal array of equi-distantly spaced phototransistors.

Claims

1. A semiconductor reading device comprising:

an insulated substrate;

a plurality of IC reading chips disposed on the insulated substrate, each IC reading chip comprising

a semiconductor substrate having a major surface portion,

a plurality of bipolar transistors for producing video signals in response to incident light, the bipolar transistors being formed in the substrate major surface portion and being equi-distantly aligned in the longitudinal direction of the substrate, and

drive means arranged parallel to the bipolar transistors, the drive means comprising a plurality of signal transmitting elements and shift register means, each of the signal transmitting elements being connected to a respective one of the bipolar transistors, and the shift register means being coupled to the signal transmitting elements for sequentially reading the video signals from the bipolar transistors;

and wherein the distance between the two adjacent bipolar transistors of each two respective adjacent IC reading chips is the same as the distance between the bipolar transistors arranged on the semiconductor substrates.

2. A semiconductor reading device according to claim 1;

wherein the shift register means comprises a plurality of stages.

3. A semiconductor reading device according to claim 1;

wherein the signal transmitting elements comprises MOS transistors.

4. A semiconductor reading device comprising:

an insulated substrate; and

a plurality of integrated circuit reading chips disposed on the substrate, each reading chip comprising a semiconductor substrate, a plurality of phototransistors responsive to light incident thereon for producing video signals, the phototransistors being formed in a major surface portion of the semiconductor substrate and being equi-distantly spaced from one another in a longitudinal direction of the semiconductor substrate, a plurality of signal transmitting elements connected to respective ones of the phototransistors and being switchable between a conducting state to transmit therethrough the video signal from its corresponding phototransistor and a non-conducting state, and means for sequentially switching the signal transmitting elements from the non-conducting state to the conducting state to sequentially read out the video signals from the phototransistors; and

wherein the plurality of reading chips are spaced from one another in the longitudinal direction of the semiconductor substrate such that the two endmost phototransistors which are adjacent each other on each two adjacent reading chips are spaced apart a distance equal to the equi-distant spacing between the phototransistors on the reading chips to define a longitudinal array of equi-distantly spaced phototransistors.

5. A semiconductor reading device according to claim 4;

wherein the means for sequentially switching the signal transmitting elements comprises shift register means.

6. A semiconductor reading device according to claim 5;

wherein the shift register means comprises a multi-stage shift register having a plurality of stages each connected to one of the signal transmitting elements.

7. A semiconductor reading device according to claim 6;

wherein the signal transmitting elements comprise MOS transistors.

8. A semiconductor reading device according to claim 7;

wherein the phototransistors comprise bipolar transistors.

9. A semiconductor reading device according to claim 6;

wherein the phototransistors comprise bipolar transistors.

10. A semiconductor reading device according to claim 4;

wherein the signal transmitting elements comprise MOS transistors.

11. A semiconductor reading device according to claim 10;

wherein the phototransistors comprise bipolar transistors.

12. A semiconductor reading device according to claim 4;

wherein the phototransistors comprise bipolar transistors.