Light emitting display apparatus

• US 5,836,676 A
• Filed: 01/06/1997
• Issued: 11/17/1998
• Est. Priority Date: 05/07/1996
• Status: Expired due to Fees

• Current Assignee: KOHA Company Limited (Tamura Corporation)
• Original Assignee: KOHA Company Limited (Tamura Corporation)
• Inventors: Ando, Akira, Sekine, Mitsuji
• Primary Examiner(s): CARIASO, ALAN B
• Application Number:
  US08/779,202
• Time in Patent Office: 680 Days
• Field of Search: 40/444, 40/451, 40/452, 40/544, 40/581, 313/500, 313/501, 313/510, 362/230, 362/231, 362/234-237, 362/244, 362/251, 362/295, 362/800
• US Class Current: 362/244
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 33/641 characterized by the materials
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A light emitting display apparatus has pixels arranged in rows to display a predetermined image, each of the pixels being composed of red and green, or blue and yellow light emitting diodes, lenses provided on the pixels, each of the lenses horizontally diffusing lights emitted from the red and green, or blue and yellow light emitting diodes, and vertically diverging the lights, a driver for driving the red and green, or blue and yellow light emitting diodes to be turned on in accordance with predetermined light intensities, thereby representing various colors including a white color. In the light emitting display apparatus, therefore, the displayed image is easy to be recognized, the number of the LEDs and the power consumption are decreased, and the density of pixels is increased. Further, the image information of the white color is displayed without the three original color light emitting diodes, that is, red, green and blue light emitting diodes, and the color of an image information is selectable from a variety of colors which include a white color.

Claims

1. A light emitting display apparatus, comprising:

a plurality of pixels arranged in a plurality of rows to display a predetermined image, each of said plurality of pixels being composed of one or more light emitting diodes;

a plurality of lenses provided on said plurality of pixels, each of said plurality of lenses horizontally expanding lights emitted from said one or more light emitting diodes, and vertically conversing said lights; and

a plurality of partitioning boards each provided between two adjacent rows of said plurality of rows, said plurality of partitioning boards being higher than said plurality of lenses.

2. The light emitting display apparatus, according to claim 1, wherein:

each of said plurality of pixels has at least two luminous chips; and

a luminous color of one of said luminous chips is different from that of other luminous chips.

3. The light emitting display apparatus, according to claim 1, wherein:

each of said plurality of pixels has at least two luminous chips; and

a luminous color of one of said luminous chips is different from that of other luminous chips.

4. A light emitting display apparatus, comprising:

a plurality of pixels to display a predetermined image, each of said plurality of pixels being composed of red and green light emitting diodes and having no light emitting diode of a color other than red and green; and

means for driving said red and green light emitting diodes to be turned on in accordance with predetermined light intensities, thereby representing various colors including a white color.

6. The light emitting display apparatus, according to claim 4, wherein:

said means for driving has a white color displaying mode to represent a white color by turning on both said red and green light emitting diodes in accordance with predetermined light intensities, and a plural colors displaying mode to represent any color other than said white color by turning on said red and/or green light emitting diodes in accordance with predetermined light intensities.

5. A light emitting display apparatus, comprising:

a plurality of pixels to display a predetermined image, each of said plurality of pixels being composed of blue and yellow light emitting diodes and having no light emitting diode of a color other than blue and yellow; and

means for driving said blue and yellow light emitting diodes to be turned on in accordance with predetermined light intensities, thereby representing various colors including a white color.

7. The light emitting display apparatus, according to claim 5, wherein:

said means for driving has a white color displaying mode to represent a white color by turning on both said blue and yellow light emitting diodes in accordance with predetermined light intensities, and a plural colors displaying mode to represent any color other than said white color by turning on said blue and/or yellow light emitting diodes in accordance with predetermined light intensities.

8. A light emitting display apparatus, comprising:

a plurality of pixels arranged in a plurality of rows to display a predetermined image, each of said plurality of pixels being composed of red and green light emitting diodes having no light emitting diode of a color other than red and green;

a plurality of lenses provided on said plurality of pixels, each of said plurality of lenses horizontally expanding lights emitted from said red and green light emitting diodes, and vertically converging said lights; and

means for driving said red and green light emitting diodes to be turned on in accordance with predetermined light intensities, thereby representing various colors including a white color.

10. The light emitting display apparatus, according to claim 8, wherein:

said means for driving has a white color displaying mode to represent a white color by turning on both said red and green light emitting diodes in accordance with predetermined light intensities, and a plural colors displaying mode to represent any color other than said white color by turning on said red and/or green light emitting diodes in accordance with predetermined light intensities.

9. A light emitting display apparatus, comprising:

a plurality of pixels arranged in a plurality of rows to display a predetermined image, each of said plurality of pixels being composed of blue and yellow light emitting diodes having no light emitting diode of a color other than blue and yellow;

a plurality of lenses provided on said plurality of pixels, each of said plurality of lenses horizontally expanding lights emitted from said blue and yellow light emitting diodes, and vertically converging said lights; and

means for driving said blue and yellow light emitting diodes to be turned on in accordance with predetermined light intensities, thereby representing various colors including a white color.

11. The light emitting display apparatus, according to claim 9, wherein:

said means for driving has a white color displaying mode to represent a white color by turning on both said blue and yellow light emitting diodes in accordance with predetermined light intensities, and a plural colors displaying mode to represent any color other than said white color by turning on said blue and/or yellow light emitting diodes in accordance with predetermined light intensities.