DISPLAY APPARATUS AND ELECTRONIC INSTRUMENT

• US 20100245324A1
• Filed: 03/17/2010
• Published: 09/30/2010
• Est. Priority Date: 03/25/2009
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Uchino, Katsuhide, Minami, Tetsuo
• Granted Patent: US 8,284,135 B2
• Time in Patent Office: Days
• US Class Current: 345/211
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0819 used for counteracting undesired variations, e.g. feedback or autozeroing
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2300/0866 by means of changes in the pixel supply voltage
• CPC Class Codes: G09G 2320/0223 Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3291 in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements

Abstract

A display apparatus includes: a plurality of pixel circuits; and a signal supply circuit which supplies any one of a potential of a video signal, an extinction potential for extinguishing light-emitting devices, and a high-level potential higher than the extinction potential, wherein each of the plurality of pixel circuits includes a storage capacitor which retains a voltage corresponding to the video signal, a drive transistor which supplies a current based on the voltage retained in the storage capacitor to the corresponding light-emitting device, a light-emitting device which emits light in accordance with the current supplied from the drive transistor, and a write transistor which writes the voltage corresponding to the video signal to the storage capacitor after the potentials supplied by the signal supply circuit in order of the high-level potential and the extinction potential are given to the gate terminal of the drive transistor.

Claims

1. A display apparatus comprising:

a plurality of pixel circuits; and

a signal supply circuit which supplies any one of a potential of a video signal, an extinction potential for extinguishing light-emitting devices, and a high-level potential higher than the extinction potential,

wherein each of the plurality of pixel circuits includes

a storage capacitor which retains a voltage corresponding to the video signal,

a drive transistor which supplies a current based on the voltage retained in the storage capacitor to the corresponding light-emitting device,

a light-emitting device which emits light in accordance with the current supplied from the drive transistor, and

a write transistor which writes the voltage corresponding to the video signal to the storage capacitor after the potentials supplied by the signal supply circuit in order of the high-level potential and the extinction potential are given to the gate terminal of the drive transistor.

2. The display apparatus according to claim 1, further comprising:

a power supply circuit which supplies the same power supply potentials to the plurality of pixel circuits for every plural number of rows,

wherein the drive transistor supplies to the light-emitting device the current based on the voltage retained in the storage capacitor by receiving the power supply potential.

3. The display apparatus according to claim 1,

wherein the signal supply circuit supplies the high-level potential within the range of the potential of the video signal.

4. The display apparatus according to claim 3,

wherein the signal supply circuit supplies the high-level potential within the range lower than half of the range of the potential of the video signal.

5. The display apparatus according to claim 1,

wherein the light-emitting devices are organic electroluminescence devices.

6. An electronic instrument comprising:

a plurality of pixel circuits; and

a signal supply circuit which supplies any one of a potential of a video signal, an extinction potential for extinguishing a light-emitting device, and a high-level potential higher than the extinction potential,

wherein each of the plurality of pixel circuits includes

a storage capacitor which retains a voltage corresponding to the video signal,

a drive transistor which supplies a current based on the voltage retained in the storage capacitor to the corresponding light-emitting device,

a light-emitting device which emits light in accordance with the current supplied from the drive transistor, and

a write transistor which writes the voltage corresponding to the video signal to the storage capacitor after potentials supplied by the signal supply circuit in order of the high-level potential and the extinction potential are given to the gate terminal of the drive transistor.