STEREOSCOPIC IMAGE DISPLAY DEVICE

• US 20130057789A1
• Filed: 09/06/2012
• Published: 03/07/2013
• Est. Priority Date: 09/07/2011
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: Cheung-Hwan An, Jae-Woo Lee, Sung-Min Jung
• Inventors: AN, Cheung-Hwan, Lee, Jae-Woo, Jung, Sung-Min
• Granted Patent: US 10,151,930 B2
• Time in Patent Office: Days
• US Class Current: 349/15
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G02B 30/31 involving active parallax barriers involving directional light or back-light sources G02B30/33
• CPC Class Codes: G02F 1/13 based on liquid crystals, e.g. single liquid crystal display cells
• CPC Class Codes: H04N 13/31 using parallax barriers
• CPC Class Codes: H04N 13/351 for displaying simultaneously

Abstract

Discussed is a stereoscopic image display device, which acquires design parameters based on the same aperture ratio and the same back distance regarding a single barrier cell when displaying different numbers of views using the barrier cell. The barrier cell, which includes first and second substrates opposite to each other, first electrodes arranged at an interval on the first substrate, a second electrode formed on the second substrate, and a liquid crystal layer between the first and second substrates, is driven to display different numbers of views. Assuming that a region of the barrier cell corresponding to a small view number is one unit, the number of unit drive regions divided in one unit is defined by K/A (where, ‘A’ is an aperture ratio of the barrier cell, and ‘K’ is {large view number/small view number}*n ('"'"'n′ is a natural number between 1 and the small view number).

Claims

1. A stereoscopic image display device comprising:

an image panel; and

a barrier cell including a first substrate and a second substrate opposite to each other, a plurality of first electrodes arranged on the first substrate to extend in a first direction, a second electrode formed on the second substrate, and a liquid crystal layer formed between the first and second substrates,

wherein the barrier cell is driven to display different numbers of views, and

wherein, assuming that a region of the barrier cell corresponding to a small view number is one unit, the number of unit drive regions divided in one unit is defined by K/A, where ‘

A’

is an aperture ratio of the barrier cell, and ‘

K’

is ‘

{large view number/small view number}*n’

, wherein ‘

n’

is a natural number between 1 and the small view number.

2. The device according to claim 1, wherein a value of ‘

n’

is selected to allow a value of K to be represented by the minimum multiple natural value.

3. The device according to claim 1, wherein the same back distance and the same aperture ratio are maintained during driving under the different numbers of views.

4. The device according to claim 1, wherein the unit drive regions have the same width when driving under the small view number and driving under the large view number.

5. The device according to claim 4, wherein the same number of first electrodes are arranged in each unit drive region.

6. The device according to claim 1, further comprising a voltage source to apply common voltage to the second electrode and to selectively apply common voltage or drive voltage to the first electrodes.

7. The device according to claim 6, wherein, the voltage source applies the same drive voltage to the first electrodes corresponding to the each unit drive region.