Light emitting display

• US 6,404,131 B1
• Filed: 08/08/2000
• Issued: 06/11/2002
• Est. Priority Date: 08/09/1999
• Status: Expired due to Fees

• Current Assignee: Kazuo Kobayashi, Yoshichu Mannequin Company Limited (Yoshichu Co. Ltd.)
• Original Assignee: Kazou Kobayashi, Yoshichu Mannequin Company Limited (Yoshichu Co. Ltd.)
• Inventors: Kobayashi, Kazuo, Yarita, Hidetoshi, Kawano, Tai
• Primary Examiner(s): Philogene, Haissa
• Assistant Examiner(s): Alemu, Ephrem
• Application Number:
  US09/634,997
• Time in Patent Office: 672 Days
• Field of Search: 315/291, 315/76, 315/82, 315/169.3, 313/513, 313/116, 362/310, 362/355, 362/245, 362/241, 362/305, 362/307, 362/800
• US Class Current: 315/82
• CPC Class Codes: G09F 13/0404 the light source being enclosed in a box forming the character of the sign
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00
• CPC Class Codes: G09F 2013/222 with LEDs
• CPC Class Codes: G09F 9/3026 Video wall, i.e. stackable semiconductor matrix display modules video wall control systems G06F3/1446, G09G2300/026
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/181 Encapsulation
• CPC Class Codes: H01L 33/46 Reflective coating, e.g. dielectric Bragg reflector
• CPC Class Codes: H01L 33/52 Encapsulations
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A light emitting display includes a display body made of a light diffusing resin material which comprises a transparent resin doped with a light diffusing material, and an LED lamp having an LED chip encapsulated in a mold member made of a light transmissive material and embedded in the display body with its top facing a front side of the display body. A light reflective surface is disposed on a rear side of the display body to face the front side, and the LED lamp is covered at its top with a light reflective coating.

Claims

1. A light emitting display comprising:

a light emitting display element having a display surface, the light emitting display element being made of a light diffusing resin material which comprises a transparent resin doped with a light diffusing material;

an LED lamp having a top surface and an LED chip encapsulated in a mold member made of a light transmissive material the LED lamp being disposed behind the display surface of the light emitting display element such that the top surface faces the display surface of the light emitting display element, the top surface of the LED lamp being covered with a light reflective coating; and

a light reflective surface disposed at a rear side of the LED lamp so as to face the display surface of the light emitting display element.

4. A light emitting display according to claim 1, wherein the light reflective coating covering the top surface of the LED lamp is made of a film of opaque paint.

7. A light emitting display according to claim 4, wherein the paint coating is a film of a white color paint.

10. A light emitting display according to claim 1, wherein the LED lamp has a white-light LED chip and a portion of an outer surface of the mold member is covered with a light transmissive tinted coating such that the top surface of the LED lamp is free of the light transmissive tinted coating.

13. A light emitting display according to claim 1, wherein the LED lamp has a white-light LED chip encapsulated in the mold member, the mold member being made of a light transmissive, tinted material.

16. A light emitting display according to claim 1, further comprising a plurality of LED lamps classified into at least two different types, each type being operable to emit a different color of light, the LED lamps being arrayed in a combination at equal intervals of distance.

19. A light emitting display according to claim 1, further comprising a plurality of LED lamps classified into a red color LED lamp type, a green color LED lamp type, and a blue color LED lamp type, the plurality of LED lamps being arrayed in a predetermined arrangement.

22. A light emitting display according to claim 1, further comprising a plurality of LED lamps, each LED lamp being a three-color LED lamp having a red color LED chip, a green color LED chip, and a blue color LED chip encapsulated in a single mold member, the LED lamps being arrayed at equal intervals of distance.

25. A light emitting display according to claim 1, wherein only the top surface of the LED lamp is covered with the light reflective coating such that light emitted from the LED chip reflects off of the light reflective coating and strikes the light reflective surface.

2. A light emitting display comprising:

a display body having a front side and being made of a light diffusing resin material which comprises a transparent resin doped with alight diffusing material;

an LED lamp having a top surface and an LED chip encapsulated in a mold member made of a light transmissive material, the LED lamp being embedded in the display body such that the top surface faces the front side of the display body, the top surface of the LED lamp being covered with a light reflective coating; and

a light reflective surface disposed on a rear side of the display body so as to face the front side of the display body.

5. A light emitting display according to claim 2, wherein the light reflective coating covering the top surface of the LED lamp is made of a film of opaque paint.

8. A light emitting display according to claim 5, wherein the paint coating is a film of a white color paint.

11. A light emitting display according to claim 2, wherein the LED lamp has a white-light LED chip and a portion of an outer surface of the mold member is covered with a light transmissive tinted coating such that the top surface of the LED lamp is free of the light transmissive tinted coating.

14. A light emitting display according to claim 2, wherein the LED lamp has a white-light LED chip encapsulated in the mold member, the mold member being made of a light transmissive, tinted material.

17. A light emitting display according to claim 2, further comprising a plurality of LED lamps classified into at least two different types, each type being operable to emit a different color of light, the LED lamps being arrayed in a combination at equal intervals of distance.

20. A light emitting display according to claim 2, further comprising a plurality of LED lamps classified into a red color LED lamp type, a green color LED lamp type, and a blue color LED lamp type, the plurality of LED lamps being arrayed in a predetermined arrangement.

23. A light emitting display according to claim 2, further comprising a plurality of LED lamps, each LED lamp being a three-color LED lamp having a red color LED chip, a green color LED chip, and a blue color LED chip encapsulated in a single mold member, the LED lamps being arrayed at equal intervals of distance.

26. A light emitting display according to claim 2, wherein only the top surface of the LED lamp is covered with the light reflective coating such that light emitted from the LED chip reflects off of the light reflective coating and strikes the light reflective surface.

3. A light emitting display comprising:

a casing including a front plate made of a light diffusing resin material which comprises a transparent resin doped with a light diffusing material;

an LED lamp having a top surface and an LED chip encapsulated in a mold member made of a light transmissive material, the LED lamp being mounted in the casing such that the top surface faces the front plate of the casing, the top surface of the LED lamp being covered with a light reflective coating; and

a light reflective surface disposed at a rear side of the LED lamp on the casing so as to face the front plate of the casing.

6. A light emitting display according to claim 3, wherein the light reflective coating covering the top surface of the LED lamp is made of a film of opaque paint.

9. A light emitting display according to claim 6, wherein the paint coating is a film of a white color paint.

12. A light emitting display according to claim 3, wherein the LED lamp has a white-light LED chip and a portion of an outer surface of the mold member is covered with a light transmissive tinted coating such that the top surface of the LED lamp is free of the light transmissive tinted coating.

15. A light emitting display according to claim 3, wherein the LED lamp has a white-light LED chip encapsulated in the mold member, the mold member being made of a light transmissive, tinted material.

18. A light emitting display according to claim 3, further comprising a plurality of LED lamps classified into at least two different types, each type being operable to emit a different color of light, the LED lamps being arrayed in a combination at equal intervals of distance.

21. A light emitting display according to claim 3, further comprising a plurality of LED lamps classified into a red color LED lamp type, a green color LED lamp type, and a blue color LED lamp type, the plurality of LED lamps being arrayed in a predetermined arrangement.

24. A light emitting display according to claim 3, further comprising a plurality of LED lamps, each LED lamp being a three-color LED lamp having a red color LED chip, a green color LED chip, and a blue color LED chip encapsulated in a single mold member, the LED lamps being arrayed at equal intervals of distance.

27. A light emitting display according to claim 3, wherein only the top surface of the LED lamp is covered with the light reflective coating such that light emitted from the LED chip reflects off of the light reflective coating and strikes the light reflective surface.