Display and driving method thereof with black data alignment

• US 8,289,311 B2
• Filed: 12/05/2006
• Issued: 10/16/2012
• Est. Priority Date: 12/26/2005
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Jo, Sung Hak
• Primary Examiner(s): Shalwala, Bipin
• Assistant Examiner(s): Crawley, Keith
• Application Number:
  US11/633,492
• Publication Number:
  US 20070146384A1
• Time in Patent Office: 2,142 Days
• Field of Search: None
• US Class Current: 345/213
• CPC Class Codes: G09G 2310/061 for resetting or blanking
• CPC Class Codes: G09G 2320/0261 in the context of movement of objects on the screen or movement of the observer relative to the screen
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters

Abstract

The display device may include a data aligning part that analyzes a gray level of input data and inserts black data into frame data having less than a designated reference gray level; and a driver that displays the data from the data aligning part in a display panel.

Claims

1. A display device, comprising:

a data aligning part that analyzes a gray level of input data, inserts black data into the input data when the input data is less than a designated reference gray level value and aligns the input data and the black data; and

a driver that displays an aligned data from the data aligning part in a display panel, wherein the driver includes a data driver that converts the aligned data from the data aligning part into an analog data voltage and supplies the analog data voltage to data lines of the display panel and a scan driver that sequentially supplies a scan pulse to scan lines that cross the data lines,

wherein the driver further includes a timing controller that supplies the input data to the data aligning part, supplies the aligned data from the data aligning part to the data driver, and controls the data driver and the scan driver, the timing controller includes a signal controller to generate a second vertical/horizontal synchronization signal, a second clock signal and a second data enable signal using a first vertical/horizontal synchronization signal, a first clock signal and a first data enable signal,

wherein the second vertical/horizontal synchronization signal, the second clock signal and the second data enable signal are signals for driving the data driver and the scan driver with the speed of 120 Hz,

wherein the signal controller acts to delay the second vertical/horizontal synchronization signal, the second clock signal and the second data enable signal for a fixed period so that the signals are synchronized with the aligned data from the data aligning part,

wherein when the input data is at least the designated reference gray level, the data aligning part inserts no black data for the input data and supplies the input data to the data driver for one frame,

wherein the designated reference gray level value is any gray level value between the highest brightness obtained by inserting black data and a brightness higher than that,

wherein the scan pulse comprises a first scan pulse synchronized with the input data supplied to the display panel and a second scan pulse synchronized with the black data supplied to the display panel.

2. The display device according to claim 1, wherein the data aligning part is embedded within the timing controller.

3. The display device according to claim 1, wherein the timing controller samples digital video data in accordance with a pixel clock.

4. The display device according to claim 1, wherein the data aligning part inserts the black data for one frame period.

5. The display device according to claim 1, wherein the display device is a liquid crystal display device or an organic light emitting diode device.

6. A displaying method, comprising:

providing a timing controller that supplies the input data to a data aligning part, supplies the data aligned by the data aligning part to a data driver, and controls the data driver and a scan driver;

generating a second vertical/horizontal synchronization signal, a second clock signal and a second data enable signal using a first vertical/horizontal synchronization signal, a first clock signal and a first data enable signal;

analyzing a gray level of input data and inserting black data into the input data when the input data is less than a designated reference gray level value;

aligning the input data and the black data;

converting an aligned data into an analog data voltage and supplying the analog data voltage to data lines of the display panel;

sequentially supplying a scan pulse to scan lines that cross the data lines; and

displaying the aligned data in a display panel,

wherein when the input data is at least the designated reference gray level, the data aligning part inserts no black data for the input data and supplies the input data to the driver for one frame,

wherein the designated reference gray level value is any gray level value between the highest brightness obtained by inserting black data and a brightness higher than that,

wherein the second vertical/horizontal synchronization signal, the second clock signal and the second data enable signal are signals for driving the data driver and the scan driver with the speed of 120 Hz,

wherein the timing controller includes a signal controller for acting to delay the second vertical/horizontal synchronization signal, the second clock signal and the second data enable signal for a fixed period so that the signals are synchronized with the aligned data from the data aligning part,

wherein the scan pulse comprises a first scan pulse synchronized with the input data supplied to the display panel and a second scan pulse synchronized with the black data supplied to the display panel.

7. The displaying method according to claim 6, wherein the data aligning part is embedded within the timing controller.

8. The displaying method according to claim 6, further comprising:

sampling digital video data in accordance with a pixel clock.

9. The displaying method according to claim 6, further comprising:

inserting the black data for one frame period.

10. The displaying method according to claim 6, wherein the display panel is a liquid crystal display panel or an organic light emitting diode panel.