IP Library Granted Patent US 8,659,515
Granted Patent B2
US 8,659,515 · App. 13/283,134 · Granted Feb 25, 2014

Display device, method of driving same, and electronic device

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 8,659,515
App. No.
13/283,134
Granted
Feb 25, 2014
Kind
B2
Abstract

A display device is disclosed. The display device includes: a pixel array portion and a driver portion for driving the pixel array portion. The pixel array portion has rows of scanning lines, columns of signal lines, pixels arranged in rows and columns at intersections of the scanning lines and the signal lines, and power lines disposed in a corresponding manner to the rows of the pixels. The driver portion includes a main scanner, a power-supply scanner, and a signal selector. Each of the pixels includes light-emitting devices, a sampling transistor, a driving transistor, a retaining capacitor.

Claims (28)

1. A display device comprising:

rows of scanning lines;

columns of signal lines;

pixels arranged in rows and columns; and

power lines, wherein

each of the pixels includes a light-emitting device, a sampling transistor providing a reference potential and a signal potential from one of the signal lines, a driving transistor, and a retaining capacitor,

the driving transistor is connected between one of the power lines and the light-emitting device,

a first control signal is output to a gate of the sampling transistor to turn on the sampling transistor while the one of the signal lines is at the reference potential, to correct a threshold voltage for the driving transistor,

a second control signal is output to the gate of the sampling transistor to turn on the sampling transistor while the one of the signal lines is at the signal potential, the sampling transistor being part of a current path that provides the signal potential to a gate of the driving transistor, the second control signal having a pulse width that is shorter than a time interval for which the one of the signal lines is at the signal potential, and

an adjustment voltage is subtracted from a voltage retained in the retaining capacitor simultaneously with outputting the second control signal to provide the signal potential to the gate of the driving transistor, the adjustment voltage being subtracted from the voltage due to a current through the driving transistor.

2. An electronic device equipped with a display device as set forth in claim 1 .

3. A display device comprising:

rows of scanning lines;

columns of signal lines;

a plurality of pixels arranged in rows and columns; and

power lines,

wherein individual ones of the plurality of pixels include a light-emitting device, a sampling transistor, a driving transistor, a retaining capacitor, the driving transistor being connected between one of the power lines and the light-emitting device,

wherein a reference potential is applied to a gate of the drive transistor in plural horizontal periods preceding a sampling of a signal potential,

wherein the signal potential is applied to the gate of the drive transistor for a period shorter than a time interval for which the signal line is at the signal potential, and

wherein an adjustment voltage is subtracted from a voltage retained in the retaining capacitor simultaneously with the applying of the signal potential, the adjustment voltage being subtracted from the voltage due to a current through the drive transistor.

4. The display device according to claim 3 , wherein the adjustment voltage is increased as the signal potential is increased.

5. An electronic device equipped with a display device as set forth in claim 4 .

6. A method for driving a display device comprising rows of scanning lines, columns of signal lines, a plurality of pixels arranged in rows and columns, and power lines, wherein individual ones of the plurality of pixels include a light-emitting device, a sampling transistor, a driving transistor, a retaining capacitor, the driving transistor being connected between one of the power lines and the light-emitting device, the method comprising:

applying a reference potential to a gate of the drive transistor in plural horizontal periods preceding a sampling of a signal potential,

applying the signal potential to the gate of the drive transistor for a period shorter than a time interval for which the signal line is at the signal potential; and

subtracting an adjustment voltage from a voltage retained in the retaining capacitor simultaneously with the applying of the signal potential, the adjustment voltage being subtracted from the voltage due to a current through drive transistor.

7. The method according to claim 6 , wherein the adjustment voltage is increased as the signal potential is increased.

8. An electronic device equipped with a display device as set forth in claim 3 .

Assignments (5)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 18, 2025
From: JDI DESIGN AND DEVELOPMENT G.K.
To: MAGNOLIA BLUE CORPORATION
Reel/Frame 072039/0656 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 31, 2024
From: JOLED, INC.
To: JDI DESIGN AND DEVELOPMENT G.K.
Reel/Frame 066382/0619 →
CORRECTION BY AFFIDAVIT FILED AGAINST REEL/FRAME 063396/0671 Recorded Jun 12, 2023
From: JOLED, INC.
To: JOLED, INC.
Reel/Frame 064067/0723 →
SECURITY INTEREST Recorded Apr 20, 2023
From: JOLED, INC.
To: INCJ, LTD.
Reel/Frame 063396/0671 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 15, 2015
From: SONY CORPORATION
To: JOLED INC.
Reel/Frame 036106/0355 →