Electronic apparatus and method of driving the same

• US 8,564,531 B2
• Filed: 05/25/2011
• Issued: 10/22/2013
• Est. Priority Date: 05/26/2010
• Status: Active Grant

• Current Assignee: E Ink Corporation (E Ink Holdings Incorporated)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Ozawa, Tokuro
• Primary Examiner(s): GIESY, ADAM
• Application Number:
  US13/115,443
• Publication Number:
  US 20110291708A1
• Time in Patent Office: 881 Days
• Field of Search: None
• US Class Current: 345/107
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 3/344 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167

Abstract

An electronic apparatus includes an electronic circuit including a driving transistor, an additional capacitive element and a first switch for controlling a connection between a circuit point and a control terminal and a driving circuit which controls the first switch to an off state and changes the potential of the control terminal such that the driving transistor transitions to an on state in a first period, controls the first switch to the on state so as to set the potential of the control terminal to an initial compensation value, in a second period, and controls the first switch to the on state and changes the driving potential from the first potential to the second potential such that the driving transistor transitions to the on state, in a third period.

Claims

1. An electronic apparatus comprising an electronic circuit and a driving circuit,

wherein the electronic circuit includes:

a driving transistor including a first terminal connected to a driving potential line to which a driving potential is supplied, a second terminal connected to a circuit point, and a control terminal for controlling a connection state between both terminals;

an additional capacitive element connected to the circuit point; and

a first switch which controls a connection between the circuit point and the control terminal,

wherein the driving circuit controls the first switch to an off state and changes the potential of the control terminal such that the driving transistor transitions to an on state, in a first period in which the driving potential is set to a first potential,

controls the first switch to the on state so as to set the potential of the control terminal to an initial compensation value, in a second period after the elapse of the first period, and

controls the first switch to the on state and changes the driving potential from the first potential to a second potential such that the driving transistor transitions to the on state, in a third period after the elapse of the second period.

2. The electronic apparatus according to claim 1, wherein the driving circuit changes the potential of the control terminal in an opposite direction of the change in the first period before the start of the second period and controls the first switch to the on state in the second period so as to set the potential of the control terminal to the initial compensation value.

3. The electronic apparatus according to claim 1, wherein the driving circuit changes the potential of the control terminal in an opposite direction of the change in the first period so as to set the potential of the control terminal to the initial compensation value, after the first switch is controlled to the on state, in the second period.

4. The electronic apparatus according to claim 1, wherein the electronic circuit includes a first capacitive element including a first electrode and a second electrode,

the second electrode is connected to the control terminal, and

the driving circuit supplies a signal potential to the first electrode within the third period or after the elapse of the third period, and variably sets a voltage between the control terminal and the first terminal in a fourth period after the elapse of the third period.

5. The electronic apparatus according to claim 4, wherein the driving circuit variably sets the potential of the first electrode in the fourth period.

6. The electronic apparatus according to claim 4, wherein the electronic circuit includes a second capacitive element including a third electrode and a fourth electrode,

the fourth electrode is connected to the control terminal, and

the driving circuit variably sets the potential of the third electrode in the fourth period.

7. The electronic apparatus according to claim 4, wherein the driving circuit variably sets the driving potential of the driving potential line in the fourth period.

8. The electronic apparatus according to claim 4, wherein the first electrode of the first capacitive element is directly connected to a signal line to which the signal potential is supplied.

9. The electronic apparatus according to claim 4, wherein the electronic circuit includes a second switch which controls electrical connection between the first electrode of the first capacitive element and a signal line to which the signal potential is supplied.

10. A method of driving an electronic apparatus including a driving transistor having a first terminal connected to a driving potential line to which a driving potential is supplied, a second terminal connected to a circuit point and a control terminal for controlling a connection state between both terminals, an additional capacitive element connected to the circuit point, and a first switch which controls a connection between the circuit point and the control terminal, the method comprising:

controlling the first switch to an off state and changing the potential of the control terminal such that the driving transistor transitions to an on state, in a first period in which the driving potential is set to a first potential;

controlling the first switch to the on state so as to set the potential of the control terminal to an initial compensation value, in a second period after the elapse of the first period; and

controlling the first switch to the on state and changing the driving potential from the first potential to a second potential such that the driving transistor transitions to the on state, in a third period after the elapse of the second period.