STEREOSCOPIC IMAGE DISPLAY AND DRIVING METHOD THEREOF

• US 20110018983A1
• Filed: 12/04/2009
• Published: 01/27/2011
• Est. Priority Date: 07/22/2009
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lee, Jeongki, KIM, Seonggyun
• Granted Patent: US 8,441,528 B2
• Time in Patent Office: Days
• US Class Current: 348/56
• CPC Class Codes: G02B 30/24 involving temporal multiplexing, e.g. using sequentially activated left and right shutters
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof

Abstract

A stereoscopic image display includes: a display device that time-division displays left-eye image data and right-eye image data; shutter glasses comprising a left-eye shutter and a right-eye shutter alternately turned on and off in synchronization with the display device; and a backlight unit that irradiates light to the display device and is periodically turned on and off such that the backlight unit is turned on when a predetermined time determined according to a response time of liquid crystal lapses from a start point of a frame period.

Claims

1. A stereoscopic image display comprising:

a display device that time-division displays left-eye image data and right-eye image data;

shutter glasses comprising a left-eye shutter and a right-eye shutter alternately turned on and off in synchronization with the display device; and

a backlight unit that irradiates light to the display device and is periodically turned on and off,

wherein the backlight unit is turned on when a predetermined time determined according to a response time of liquid crystal lapses from a start point of a frame period.

2. The display of claim 1, wherein the stereoscopic image display further comprising:

a controller that controls an operation timing of the display device, the shutter glasses, and the backlight unit and supplies the left-eye image data and the right-eye image data to a data driver of the display device.

3. The display of claim 2, wherein the controller controls the operation timing of the display device, the shutter glasses and the backlight unit based on a frame frequency of 200 Hz or higher.

4. The display of claim 3, wherein the display device repeatedly addresses the left-eye image data twice during an nth frame period and an (n+1)th frame period, and repeatedly addresses the right-eye image data twice during an (n+2)th frame period and an (n+3)th frame period, and the backlight unit is turned on when a certain time lapses after a start point of the (n+1)th frame period and turned off at an end point of the (n+1)th frame period, and is turned on when a certain time lapses after a start point of the (n+3)th frame period and turned off at an end point of the (n+3)th frame period.

5. The display of claim 4, wherein the left-eye shutter of the shutter glasses is open during the nth frame period and the (n+1)th frame period, and the right-eye shutter of the shutter glasses is open during the (n+2)th frame period and the (n+3)th frame period.

6. The display of claim 3, wherein the display device addresses the left-eye data during the nth frame period, addresses black data during the (n+1)th frame period, addresses the right-eye image data during the (n+2)th frame period, and then addresses the black data during the (n+3)th frame period, and the backlight unit is turned on when a certain time lapses after a start point of the nth frame period and turned off at the end point of the (n+1)th frame period, and is turned on when a certain time lapses after a start point of the (n+2)th frame period and turned off at the end point of the (n+3)th frame period.

7. The display of claim 6, wherein the left-eye shutter of the shutter glasses is open during the nth frame period and the (n+1)th frame period, and the right-eye shutter of the shutter glasses is open during the (n+2)th frame period and the (n+3)th frame period.

8. The display of claim 3, wherein the display device addresses left-eye data having first gamma characteristics during the nth frame period, addresses left-eye image data having second gamma characteristics during the (n+1)th frame period, addresses right-eye image data having first gamma characteristics during the (n+2)th frame period, and then addresses right-eye image data having second gamma characteristics during the (n+3)th frame period, and the backlight unit is turned on when a certain time lapses after a start point of the nth frame period and turned off at the end point of the (n+1)th frame period, and is turned on when a certain time lapses after a start point of the (n+2)th frame period and turned off at the end point of the (n+3)th frame period.

9. The display of claim 8, wherein the left-eye shutter of the shutter glasses is open during the nth frame period and the (n+1)th frame period, and the right-eye shutter of the shutter glasses is open during the (n+2)th frame period and the (n+3)th frame period.

10. A method of driving a stereoscopic image display comprising:

time-division displaying left-eye image data and right-eye image data on a display device;

alternately turning on and off a left-eye shutter and a right-eye shutter of shutter glasses in synchronization with the display device; and

turning on and off a backlight unit that irradiates light to the display device such that the backlight unit is turned on when a predetermined time determined according to a response time of liquid crystal lapses from a start point of a frame period.

11. The method of claim 10, further comprising:

repeatedly addressing the left-eye image data twice during an nth frame period and an (n+1)th frame period, and repeatedly addressing the right-eye image data twice during an (n+2)th frame period and an (n+3)th frame period to the display device;

turning on the backlight unit when a certain time lapses after a start point of the (n+1)th frame period and then turning off the backlight unit at an end point of the (n+1)th frame period; and

turning on the backlight unit when a certain time lapses after a start point of the (n+3)th frame period and then turning off the backlight unit at an end point of the (n+3)th frame period.

12. The method of claim 11, wherein the display device, the shutter glasses, and the backlight unit are operated at a frame frequency of 200 Hz or higher.

13. The method of claim 10, further comprising:

addressing the left-eye data during the nth frame period, addressing black data during the (n+1)th frame period, addressing the right-eye image data during the (n+2)th frame period, and then addressing the black data during the (n+3)th frame period to the display device;

turning on the backlight unit when a certain time lapses after a start point of the nth frame period and then turning off the backlight unit at the end point of the (n+1)th frame period; and

turning on the backlight unit when a certain time lapses after a start point of the (n+2)th frame period and then turning off the backlight unit at the end point of the (n+3)th frame period.

14. The method of claim 13, wherein the display device, the shutter glasses, and the backlight unit are operated at a frame frequency of 200 Hz or higher.

15. The method of claim 10, further comprising:

addressing left-eye data having first gamma characteristics during the nth frame period, addressing left-eye image data having second gamma characteristics during the (n+1)th frame period, addressing right-eye image data having first gamma characteristics during the (n+2)th frame period, and then addressing right-eye image data having second gamma characteristics during the (n+3)th frame period;

turning on the backlight unit when a certain time lapses after a start point of the nth frame period and then turned off the backlight unit at the end point of the (n+1)th frame period; and

turning on the backlight unit when a certain time lapses after a start point of the (n+2)th frame period and then turning off the backlight unit at the end point of the (n+3)th frame period.

16. The method of claim 15, wherein the display device, the shutter glasses, and the backlight unit are operated at a frame frequency of 200 Hz or higher.