US 8,947,327 B2Granted

Display apparatus, driving method thereof, and electronic system

AssigneeSony Corporation

InventorsJunichi Yamashita, Katsuhide Uchino

Life of this patent

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Abstract

A display apparatus includes: a pixel array section including a row of scanning lines, a column of signal lines, and pixels in a matrix, each of the pixels disposed at an intersection of both of the lines; and a drive section. The drive section performs line progressive scanning on the pixels. The pixel includes a light emitting device, a sampling transistor, a driving transistor, a switching transistor, and a holding capacitor. The sampling transistor samples a video signal in the holding capacitor, the driving transistor changes the device to a luminous state, the switching transistor becomes ON in advance of the sampling of the video signal to change the light emitting device to a non-luminous state, and the sampling transistor takes in the OFF voltage from the signal line to the driving transistor, thereby preventing a penetration current from flowing from the power source toward the fixed potential.

Claims7

Dependent claims

A display apparatus, comprising:

a pixel array section including first scanning lines, second scanning lines, signal lines, and pixels in a matrix;
a drive section configured to output a first control signal and a second control signal to the first scanning lines and the second scanning lines, respectively, and configured to supply a predetermined potential to the signal lines;
at least one of the pixels comprising a light emitting device, a first transistor, a second transistor, a third transistor, and a holding capacitor;
the first transistor having a control terminal connected to one of the first scanning lines, a first current terminal connected to one of the signal lines, and a second current terminal connected to a control terminal of the second transistor;
the second transistor having a first current terminal connected to a power source and a second current terminal connected to the light emitting device;
and
the third transistor having a control terminal connected to one of the second scanning lines, a first current terminal connected to a fixed potential, and a second current terminal connected to the second current terminal of the second transistor,
wherein the second transistor is configured to supply drive current to the light emitting device to change the light emitting device to a luminous state,
wherein the third transistor becomes ON in accordance with the second control signal supplied from the one of the second scanning lines prior to sampling of a video signal to connect the light emitting device to the fixed potential to change the light emitting device to a non-luminous state, and
the first transistor becomes ON in accordance with the first control signal supplied from the one of the first scanning lines after the third transistor becomes ON, and apply the predetermined potential to the control terminal of the second transistor.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/175,310Filed 7 Feb 2014 · continuation
Priority: JP 2007-04119721 Feb 2007
Published: US 2014/0152723 A15 Jun 2014
Granted: 3 Feb 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
G09G 2300/0819
Several active elements per pixel in active matrix panels: used for counteracting undesired variations, e.g. feedback or autozeroing
G09G 2300/0852
Forming a memory circuit, e.g. a dynamic memory with one capacitor: being a dynamic memory with more than one capacitor
G09G 2310/0251
Details of the generation of driving signals: precharge or discharge of pixel before applying new pixel voltage

Family

Application12/071,228Parent of this continuation · filed 19 Feb 2008
Application12/801,908Parent of this continuation · filed 1 Jul 2010
US 7,764,251 B2Parent of this continuation · filed 27 Jul 2010
US 2014/0152723 A1Pre-grant publication · published 5 Jun 2014
US 2008/0198102 A1Published application
US 2010/0271354 A1Published application
US 8,947,327 B2This patent

From the US filing history. Foreign family members aren’t listed.