Method for adjusting color of monochromatic liquid crystal display and medical image display apparatus

• US 20030193629A1
• Filed: 03/31/2003
• Published: 10/16/2003
• Est. Priority Date: 03/29/2002
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Yamaguchi, Akira
• Granted Patent: US 7,330,225 B2
• Time in Patent Office: Days
• US Class Current: 349/61
• CPC Class Codes: G09G 2320/0606 Manual adjustment
• CPC Class Codes: G09G 2320/0633 by amplitude modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources

Abstract

The color adjustment method adjusts a color of a monochromatic image on a LCD and each of LCDs. The method uses a plurality of light sources of different color temperatures as a backlight of the LCD and controls relative quantities of light from the light sources to adjust the color of the monochromatic image displayed on the LCD or each of the LCDs. The medical image display apparatus includes a plurality of LCDs, each displaying a monochromatic image, a backlight of each of the LCDs, the backlight having a plurality of light sources of different color temperatures and a unit for adjusting relative quantities of light from the light sources to adjust each color of the monochromatic image displayed on each of the LCDs.

Claims

1. A method for adjusting a color of a monochromatic image on a liquid crystal display, comprising:

using as a backlight of said liquid crystal display a plurality of light sources of different color temperatures; and

controlling relative quantities of light from said plurality of light sources to adjust the color of the monochromatic image displayed on said liquid crystal display.

2. The method according to claim 1, wherein said plurality of light sources are cold cathode-ray tubes having correlated color temperatures between 6,000 K and 13,000 K.

3. A method for adjusting a color of a monochromatic image on each of a plurality of liquid crystal displays, comprising:

using as a backlight of each of said plurality of liquid crystal display a plurality of light sources of different color temperatures; and

controlling relative quantities of light from said plurality of light sources to adjust each color of the monochromatic image as it is displayed on each of said plurality of liquid crystal displays.

4. The method according to claim 3, wherein said plurality of light sources are cold cathode-ray tubes having correlated color temperatures between 6,000 K and 13,000 K.

5. The method according to claim 3, wherein a color difference between two monochromatic images displayed on respective two of said plurality of liquid crystal displays is so adjusted as to satisfy the condition:

Δ

u′

v′

≦

0.004

where Δ

u′

v′

is the distance between two points of u′

v′

coordinates in the CIE 1976 UCS chromaticity diagram.

6. A medical image display apparatus, comprising:

a liquid crystal panel for displaying a monochromatic image;

a backlight of said liquid crystal panel having a plurality of light sources of different color temperatures; and

means for adjusting relative quantities of light from said plurality of light sources to adjust a color of the monochromatic image displayed on said liquid crystal panel.

7. The medical image display apparatus according to claim 6, wherein said plurality of light sources are cold cathode-ray tubes having correlated color temperatures between 6,000 K and 13,000 K.

8. A medical image display apparatus, comprising:

a plurality of liquid crystal displays, each displaying a monochromatic image;

a backlight of each of said plurality of liquid crystal displays, said backlight having a plurality of light sources of different color temperatures; and

means for adjusting relative quantities of light from said plurality of light sources to adjust each color of the monochromatic image displayed on each of said plurality of liquid crystal displays.

9. The medical image display apparatus according to claim 8, wherein said plurality of light sources are cold cathode-ray tubes having correlated color temperatures between 6,000 K and 13,000 K.

10. The medical image display apparatus according to claim 8, wherein a color difference between two monochromatic images displayed on respective two of said plurality of liquid crystal displays is so adjusted as to satisfy the condition:

Δ

u′

v′

≦

0.004

where Δ

u′

v′

is the distance between two points of u′

v′

coordinates in the CIE 1976 UCS chromaticity diagram.