Display device

• US 6,097,367 A
• Filed: 09/08/1997
• Issued: 08/01/2000
• Est. Priority Date: 09/06/1996
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Yamaguchi, Kazuya, Kuriwaki, Futoshi
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Assistant Examiner(s): MARC-COLEMAN, MARTHE Y
• Application Number:
  US08/925,910
• Time in Patent Office: 1,058 Days
• Field of Search: 345/150, 345/82, 345/83, 345/88, 345/152
• US Class Current: 345/589
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]

Abstract

A display device includes: a light-emitting block including a plurality of light-emitting elements for emitting N number of different basic colors; an input circuit for receiving an input data representing a first color, a second color and a third color; a converter for converting the input data into an output data representing N number of basic colors; and a controller for controlling ON/OFF states of the plurality of light-emitting elements according to the output data. N is an integer of 4 or higher.

Claims

1. A display device, comprising:

a light-emitting block including a plurality of light-emitting elements for emitting N number of different basic colors;

an input circuit for receiving an input data representing a first color, a second color and a third color;

a converter for converting the input data into an output data representing N number of basic colors;

a controller for controlling ON/OFF states of the plurality of light-emitting elements according to the output data, wherein

N is an integer of 4 or higher,

the N number of light-emitting elements are at least four light-emitting diodes which emit light of red, blue, yellow-green and blue-green, respectively, and

an arrangement of said yellow-green and said blue-green light-emitting diodes provides a pure green color.

2. A display device according to claim 1, wherein:

a color production region within a region described by N number of vertices of the light-emitting block on a chromaticity diagram has a plurality of regions defined by M number of reference colors;

each of the M number of reference colors are obtained based on at least one of the N number of basic colors; and

the converter includes a circuit for selecting one of the plurality of regions in accordance with the input data and a circuit for generating the output data based on at least one of the M number of reference colors corresponding to a selected region within the region described by N number of vertices.

3. A display region according to claim 2, wherein the plurality of regions covers a color production region of a CRT.

4. A display region according to claim 2, wherein at least one of the M number of reference colors corresponding to the selected region within the region described by N number of vertices is a different color than the N number of basic colors.

5. A display device according to claim 2, wherein M is an integer of 4 or higher.

6. A display device according to claim 1, wherein relative positions of said blue-green and said yellow-green light emitting diodes are selected to provide said pure green color.