LIQUID CRYSTAL DISPLAY APPARATUS AND DISPLAY METHOD

• US 20080291152A1
• Filed: 05/19/2008
• Published: 11/27/2008
• Est. Priority Date: 05/21/2007
• Status: Abandoned Application

• Current Assignee: Japan Display Central Incorporated (Japan Display Incorporated)
• Original Assignee: Japan Display Central Incorporated (Japan Display Incorporated)
• Inventors: Nishiyama, Kazuhiro, Araki, Shigesumi, Tanaka, Yukio, NAKAO, Kenji
• Application Number:
  US12/123,053
• Publication Number:
  US 20080291152A1
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 1/133626 providing two modes of illumination, e.g. day-night
• CPC Class Codes: G02F 1/1395 Optically compensated birefringence [OCB]- cells or PI- cells
• CPC Class Codes: G09G 2320/0219 Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling
• CPC Class Codes: G09G 2320/068 for control of viewing angle adjustment
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: H04N 13/32 using arrays of controllable light sources; using moving apertures or moving light sources
• CPC Class Codes: H04N 13/359 Switching between monoscopic and stereoscopic modes
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 2013/403 the images being monoscopic

Abstract

A liquid crystal display apparatus includes a display panel in which liquid crystal pixels, which are composed with use of an OCB mode liquid crystal, are arranged in a matrix, first and second backlights which illuminate the display panel, and driving control means for controlling the display panel, wherein light from the first backlight is emitted with an inclination of a predetermined angle in a first direction to a plane which is perpendicular to a display surface of the display panel and extends along an alignment direction of liquid crystal molecules, and light from the second backlight is emitted with an inclination of the predetermined angle to the plane, the first direction and the second direction being symmetric to each other with regard to the plane.

Claims

1. A liquid crystal display apparatus comprising:

a display panel in which liquid crystal pixels, which are composed with use of an OCB mode liquid crystal, are arranged in a matrix;

first and second backlights which illuminate the display panel; and

driving control means for controlling the display panel,

wherein light from the first backlight is emitted with an inclination of a predetermined angle in a first direction to a plane which is perpendicular to a display surface of the display panel and extends along an alignment direction of liquid crystal molecules, and

light from the second backlight is emitted with an inclination of the predetermined angle to the plane, the first direction and the second direction being symmetric to each other with regard to the plane.

2. The liquid crystal display apparatus according to claim 1, wherein the driving control means executes control to display first and second images in one frame period.

3. The liquid crystal display apparatus according to claim 2, wherein the driving control means executes control to turn on the first backlight in a period in which display of the first image is controlled, and executes control to turn on the second backlight in a period in which display of the second image is controlled.

4. The liquid crystal display apparatus according to claim 2, wherein a direction of rubbing treatment for aligning the OCB mode liquid crystal is parallel between a front surface and a back surface of the display panel.

5. The liquid crystal display apparatus according to claim 4, wherein the display panel includes a retardation film which imparts a negative retardation to light.

6. The liquid crystal display apparatus according to claim 5, wherein the first and second images are observed in different directions.

7. The liquid crystal display apparatus according to claim 6, wherein the first and second images are parallax images, and

the liquid crystal display apparatus has a stereoscopic display function.

8. A liquid crystal display method of a liquid crystal display apparatus comprising a display panel in which liquid crystal pixels, which are composed with use of an OCB mode liquid crystal, are arranged in a matrix, first and second backlights which illuminate the display panel, and driving control means for controlling the display panel, the method comprising:

displaying a first image on the display panel and emitting light from the first backlight with an inclination of a predetermined angle in a first direction to a plane which is perpendicular to a display surface of the display panel and extends along an alignment direction of liquid crystal molecules; and

displaying a second image on the display panel and emitting light from the second backlight with an inclination of the predetermined angle to the plane, the first direction and the second direction being symmetric to each other with regard to the plane.

9. The liquid crystal display method according to claim 8, wherein the first image is an image for the right eye, and the second image is an image for the left eye.

10. The liquid crystal display method according to claim 8, wherein the first backlight is turned on after completion of the first image, and the second backlight is turned on after completion of the second image.

11. The liquid crystal display method according to claim 10, wherein the first backlight is turned off prior to display of the second image.