# US 8,770,690 B2 · Element substrate and printed wiring board

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- Number: US 8,770,690 B2
- Document ID: US8770690B2
- Status: Granted
- Kind: B2
- Application number: 13/855,531
- Filed: 2013-04-02
- Published: 2013-08-29
- Granted: 2014-07-08
- Earliest claimed: 2010-05-14
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Kengo Umeda
- Web page: https://patentgrep.com/patent/US8770690B2

## CPC

- H03K 17/16: Modifications for eliminating interference voltages or currents
- B41J 2/04541: {Specific driving circuit}
- B41J 2/0458: {controlling heads based on heating elements forming bubbles}
- H05K 1/025: {Impedance arrangements, e.g. impedance matching, reduction of parasitic impedance (H05K1/024 and H05K1/0243 take precedence; for semiconductor devices H10W44/20)}
- H05K 1/0243: {Printed circuits associated with mounted high frequency components}
- H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M)
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

An element substrate includes a plurality of terminals, a first receiving circuit and a second receiving circuit each receiving a differential signal via one of the terminals included in the plurality of terminals, a driving circuit including a first input unit for inputting a first signal and a second input unit for inputting a second signal and driving a driving element based on the first signal and the second signal, and a setting circuit for setting a first connection state of connecting an output from the first receiving circuit to the first input unit and connecting an output from the second receiving circuit to the second input unit, and a second connection state of connecting an output from the first receiving circuit to the second input unit and connecting an output from the second receiving circuit to the first input unit based on an externally input signal.

## Claims

### Claim 1

An element substrate comprising:
a first terminal and a second terminal each for receiving a signal;
a third terminal for receiving a control signal;
a first receiving circuit configured to receive a signal via the first terminal;
a second receiving circuit configured to receive a signal via the second terminal;
a driving circuit including a first receiving portion for receiving a first signal and a second receiving portion for receiving a second signal and configured to drive a driving element based on the first signal and the second signal;
a switch circuit configured to switch between a first connection state in which an output of the first receiving circuit is connected to the first receiving portion and an output of the second receiving circuit is connected to the second receiving portion, and a second connection state in which the output of the first receiving circuit is connected to the second receiving portion and the output of the second receiving circuit is connected to the first receiving portion; and
a setting circuit configured to set either the first connection state or the second connection state based on the control signal.

### Claim 2 (depends on 1)

The element substrate according to claim 1, wherein the first signal is a clock signal, and the second signal is a data signal.

### Claim 3 (depends on 1)

The element substrate according to claim 1, wherein the driving element is a recording element.

### Claim 4 (depends on 1)

The element substrate according to claim 1, wherein the first receiving circuit and the second receiving circuit convert a differential signal into a single-ended signal.

### Claim 5 (depends on 1)

A printed wiring board comprising:
the element substrates according to claim 1;
a first signal line for commonly supplying the first signal to the element substrates;
a plurality of second signal lines each for individually supplying the second signal to different one of the element substrates; and
a plurality of terminals for receiving the first signal and the second signal.