COLOR-RENDERING INDEX DEVICE

• US 20100165629A1
• Filed: 07/01/2008
• Published: 07/01/2010
• Est. Priority Date: 07/03/2007
• Status: Abandoned Application

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Nakatsue, Takehiro, Haga, Shuichi, Shimpuku, Yoshihide
• Application Number:
  US12/600,824
• Publication Number:
  US 20100165629A1
• Time in Patent Office: Days
• US Class Current: 362/293
• CPC Class Codes: G01J 3/52 using colour charts
• CPC Class Codes: H04N 1/603 controlled by characteristics of the picture signal generator or the picture reproducer

Abstract

A color chart device for providing color standards for a plurality of colors, with less power consumption as well as reduced luminance variations in colored light within an emission surface, is provided. The color chart device includes a plurality of first light emission sections emitting colored light in wavelength ranges corresponding to the plurality of colors. The first light emission section includes: an enclosure having an emission surface; a single-color light source arranged in the enclosure to emit colored light; a reflective sheet formed on inner surfaces other than the emission surface in the enclosure; and a shielding plate arranged between the single-color light source and the emission surface so as to interrupt the colored light emitted from the single-color light source. The wavelength ranges of the colored light emitted from the first light emission sections are different from one another.

Claims

1. A color chart device for providing color standards for a plurality of colors comprising a plurality of first light emission sections arranged in a matrix form as a whole to emit colored light in wavelength ranges corresponding to the plurality of colors, the first light emission sections each including:

an enclosure having an emission surface;

a single-color light source arranged in the enclosure so as to face the emission surface, and emitting colored light;

a reflective sheet formed on inner surfaces other than the emission surface in the enclosure; and

a shielding plate arranged between the single-color light source and the emission surface so as to face the emission surface, and interrupting the colored light emitted from the single-color light source,

wherein the wavelength ranges of the colored light emitted from the first light emission sections correspond to different colors from one another.

2. The color chart device according to claim 1, wherein

luminance variation, within the emission surface, in the colored light emitted from each of the first light emission sections is 5% or less.

3. The color chart device according to claim 1, wherein each of the first light emission sections further includes a diffuser plate diffusing the colored light on the emission surface of the enclosure.

4. The color chart according to claim 1, wherein each of the first light emission sections further includes a wavelength selective filter allowing the colored light emitted from each of the first light emission sections to pass there through while reducing spectrum width of the colored light.

5. The color chart device according to claim 1, wherein

the plurality of colors include, at least, red (R), green (G), blue (B), cyan (C), magenta (M) and yellow (Y).

6. The color chart device according to claim 1, wherein

the single-color light source is a single-color light emitting diode.

7. The color chart device according to claim 1, wherein

chromaticity points of the colored light emitted from the plurality of first light emission sections include chromaticity points plotted outside an sRBG gamut defined by IEC (International Electro-technical Commission).

8. The color chart device according to claim 1, wherein

the plurality of first light emission sections arranged in a matrix form are allowed to emit a single-colored light or to simultaneously emit a plurality of colored light in wavelength ranges corresponding to the plurality of colors.

9. The color chart device according to claim 1, further comprising:

a plurality of second light emission sections each emitting halftone light with one of a plurality of luminance levels in a wavelength range corresponding to one color,

the second light emission sections each including;

an enclosure having an emission surface;

a single-color light source arranged in the enclosure so as to face the emission surface and emitting colored light;

a reflective sheet formed on inner surfaces other than the emission surface in the enclosure;

a shielding plate arranged between the single-color light source and the emission surface so as to face the emission surface, and interrupting the colored light emitted from the single-color light source; and

a luminance adjustment filter for adjusting the luminance level of the halftone light emitted from the single-color light source,

wherein the luminance levels of the halftone light emitted from the second light emission sections are different from one another.

10. The color chart device according to claim 7, wherein

the luminance adjustment filters are different, in thickness, from one another among the second light emission sections.

11. The color chart device according to claim 7, wherein

the luminance adjustment filter is configured of a plurality of unit filters, and

the unit filters are different, in layer number, from one another among the second light emission sections.