POWER SUPPLY UNIT AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME

• US 20100220088A1
• Filed: 12/14/2009
• Published: 09/02/2010
• Est. Priority Date: 02/27/2009
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Min-Cheol
• Granted Patent: US 8,817,003 B2
• Time in Patent Office: Days
• US Class Current: 345/211
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 2330/04 Display protection
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: H02M 3/00 Conversion of dc power input into dc power output

Abstract

A power supply unit adapted to prevent or reduce damage to devices when the devices receive power with an abnormal voltage, and an organic light emitting display device using the same. An embodiment of the present invention provides a power supply unit, including: a power block including an input terminal for receiving an input power, an output terminal for outputting an output power, and an enable terminal for receiving an enable signal for controlling a driving of the power block; an input power unit configured to concurrently transfer the input power to the input terminal and the enable terminal; and a controller configured to control a voltage of the input power transferred to the enable terminal to determine the driving time point of the power block, and an organic light emitting display device using the same.

Claims

1. A power supply unit comprising:

a power block comprising an input terminal for receiving an input power, an output terminal for outputting an output power, and an enable terminal for receiving an enable signal to control a driving of the power block;

an input power unit configured to concurrently transfer the input power to the input terminal and the enable terminal; and

a controller configured to control a voltage of the input power transferred to the enable terminal to determine a driving time point of the power block.

2. The power supply unit as claimed in claim 1, wherein the input power unit comprises:

a first resistor coupled between the input terminal and the enable terminal; and

a capacitor having a first electrode coupled to the first resistor and the input terminal, and a second electrode coupled to a base power supply.

3. The power supply unit as claimed in claim 1, wherein the controller comprises a transistor having a first electrode coupled to the enable terminal, a second electrode coupled to a second resistor, and a gate for receiving a control signal, the second resistor being coupled between the second electrode of the transistor and the base power supply.

4. The power supply unit as claimed in claim 1, wherein the input power unit is configured to transfer the input power to the input terminal and the enable terminal, the enable terminal being input with a voltage lower than that of the input terminal.

5. An organic light emitting display device comprising:

a display region configured to receive data signals and scan signals to display an image;

a timing controller configured to generate control signals;

a data driver configured to transfer the data signals to the display region;

a scan driver configured to transfer the scan signals to the display region; and

a power supply unit configured to transfer a driving power to at least one of the display region, the data driver, and the scan driver,

wherein the power supply unit comprises;

a power block comprising an input terminal for receiving an input power, an output terminal for outputting an output power, and an enable terminal for receiving an enable signal for controlling a driving of the power block;

an input power unit configured to concurrently transfer the input power to the input terminal and the enable terminal; and

a controller configured to control a voltage of the input power transferred to the enable terminal to determine a driving time point of the power block.

6. The organic light emitting display device as claimed in claim 5, wherein the input power unit comprises:

a first resistor coupled between the input terminal and the enable terminal; and

a capacitor having a first electrode coupled to the first resistor and the input terminal, and a second electrode coupled to a base power supply.

7. The organic light emitting display device as claimed in claim 5, wherein the controller comprises a transistor having a first electrode coupled to the enable terminal, a second electrode coupled to a second resistor, and a gate for receiving a control signal, the second resistor being coupled between the second electrode of the transistor and the base power supply.

8. The organic light emitting display device as claimed in claim 5, wherein the input power unit is configured to transfer the input power to the input terminal and the enable terminal, the enable terminal being input with a voltage that is lower than that of the input terminal.

9. A method for driving an organic light emitting display device with a power supply unit comprising a power block and a controller, the method comprising:

concurrently transferring an input power to an input terminal and an enable terminal of the power block, and suspending the power block from outputting an output voltage in accordance with a voltage of the input power provided to the enable terminal;

transferring a control signal to the controller to adjust the voltage input into the enable terminal to enable the power block to be driven; and

starting driving of the organic light emitting display with the output voltage output from the power block.

10. The method for driving the organic light emitting display device as claimed in claim 9, wherein the voltage input into the enable terminal is controlled by dividing the voltage of the input power through a switching operation.