Semiconductor integrated circuit, self-luminous display panel module, electronic apparatus, and method for driving power supply line

Patent metadata

Field	Value
Publication number	US-9640115-B2
Application number	US-201615187167-A
Country	US
Kind code	B2
Filing date	Jun 20, 2016
Priority date	Oct 2, 2008
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A semiconductor integrated circuit and corresponding display panel and electronic apparatus. A pixel element includes a self-luminous element and a drive transistor connected to a power supply line. In an emission period of the self-luminous element, an active voltage and an intermediate voltage are sequentially applied between the power supply line and a potential line with a pulse-shaped waveform such that a predetermined luminance duration is obtained in the emission period. In a non-emission period of the self-luminous element, an off-state voltage is applied between the power supply line and the potential line so as to maintain the self-luminous element in a non-emission state.

First claim

What is claimed is:

1. A display apparatus comprising a display panel and the control circuitry,
wherein the display panel includes a plurality of pixel elements;
one of the pixel elements including a self-luminous element and a drive transistor, connected serially between a power supply line and a cathode electrode of the self-luminous element, wherein the power supply line being connected to a current terminal of the drive transistor;
the control circuitry is configured to drive one of the pixel element so as to control a voltage between an anode electrode of the self-luminous element and the cathode electrode, and
wherein the control circuitry is further configured to:
repeatedly switch between an active state and an intermediate state in an emission period, wherein the active state is a state that the self-luminous element emits light and the intermediate state is a state that the self-luminous element being turned off without receiving a reverse-biased potential at the anode electrode, and
an off-state voltage is applied between the anode electrode and the cathode electrode during a non-emission period; and
wherein the control circuitry is configured to variably change at least one of timing, frequency, and duration of application of the active voltage based on a condition determined according to a result of a motion detection of an input data.

2. The display apparatus according to claim 1 , wherein the control circuitry is configured to variably change an active voltage which is applied between the drive transistor and the cathode electrode during the emission period, based on the condition.

3. The display apparatus according to claim 1 , wherein the input data is an input image data and the result of the motion detection is determined based on a motion amount of the input image data.

4. The display apparatus according to claim 1 , wherein the control circuitry includes a frame memory for storing the input image data, and the motion detection is determined based comparison between two frames of the image data at least one of which is stored in the frame memory.

5. A driving device for a light-emitting element, comprising:
a power supply line and a potential line coupled to the light-emitting element, the light-emitting element being connected between the power supply line and the potential line;
a control circuit configured to drive at least the power supply line so as to control a voltage between the power supply line and the potential line;
wherein the control circuit is configured to:
in an emission period of the light-emitting element, sequentially apply an active voltage and an intermediate voltage between the power supply line and the potential line, with a pulse-shaped waveform such that a predetermined luminance duration is obtained in the emission period, and
in a non-emission period of the light-emitting element, apply an off-state voltage between the power supply line and the potential line so as to maintain the light-emitting element in a non-emission state; and

wherein the control circuitry is configured to variably change at least one of timing, frequency, and duration of application of the active voltage based on a condition determined according to a result of a motion detection of an input data.

Assignees

• Sony Corp

Inventors

• Hasegawa Hiroshi
• Isobe Teppei

Classifications

• G09G2320/064

  by time modulation of the brightness of the illumination source · CPC title

• G09G2300/0819

  used for counteracting undesired variations, e.g. feedback or autozeroing · CPC title

• G09G2320/045

  Compensation of drifts in the characteristics of light emitting or modulating elements · CPC title

• G09G2310/0289

  Details of voltage level shifters arranged for use in a driving circuit · CPC title

• G09G3/3258 Primary

  with pixel circuitry controlling the voltage across the light-emitting element · CPC title