Light source device and projector

• US 7,384,153 B2
• Filed: 06/01/2005
• Issued: 06/10/2008
• Est. Priority Date: 06/02/2004
• Status: Expired due to Fees

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Nakamura, Norio
• Primary Examiner(s): Blackman; Rochelle-Ann
• Application Number:
  US11/142,876
• Publication Number:
  US 20050270493A1
• Time in Patent Office: 1,105 Days
• Field of Search: 353/31, 353/52, 353/54, 353/56, 362/294, 362/580, 362/547, 362/264, 362/345, 362/373, 362/555, 362/561, 362/612, 362/800, 348/748, 348/750, 348/757, 348/758, 348/801, 349/161, 257 79-100
• US Class Current: 353/56
• CPC Class Codes: G03B 21/2033 LED or laser light sources
• CPC Class Codes: H01L 2224/48091 Arched
• 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 2924/12041 LED
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: H04N 9/3144 Cooling systems cooling of liquid crystal cells in general G02F1/133382; cooling of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/16
• CPC Class Codes: H04N 9/315 Modulator illumination systems general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A light source device is provided comprising: a light-emitting element; a support member having the light-emitting element flip chip mounted thereto; and a thermally conductive filling agent between the light-emitting element and the support member. By injecting the filling agent between the light-emitting element and the support member, the thermal conduction is supplemented by the filling agent. As such, heat generated by the light-emitting element can be efficiently removed outside the light source device.

Claims

1. A light source device, comprising:

a light-emitting element;

a support member having the light-emitting element mounted thereto;

a heat slag, the heat slag being non-electrically conductive;

joining portions connected to the heat slag, the joining portions being joining surfaces adapted for solder balls, the joining portions defining gaps therebetween;

solder balls connected to the joining portions, wherein the heat generated by the light-emitting element is conducted to the solder balls via the heat slag; and

a thermally conductive filling material injected in the gaps between the joining portions, the thermally conductive filling material being connected to the heat slag via the joining portions, the thermally conductive filling material being connected to an electrode of the light emitting element, wherein the heat slag is disposed between the thermally conductive filling material and the light emitting element and the thermally conductive filling material conducts heat from the heat slag and an electrode of the light-emitting element.

2. The light source device according to claim 1, wherein the filling material comprises an electrically insulating material.

3. The light source device according to claim 2, wherein the electrically insulating material includes solid particles that have a thermal conductivity that is larger than that of air.

4. The light source device according to claim 3, wherein the electrically insulating material comprises an adhesive that contains ceramic filler as the solid particles.

5. The light source device according to claim 2, wherein the electrically insulating material comprises a solidified electrically insulating material.

6. The light source device according to claim 1, wherein the filling material comprises an electrically conductive material and an electrically insulating member that insulates between electrodes of the light-emitting element.

7. The light source device according to claim 6, wherein the electrically conductive material includes electrically conductive solid particles.

8. The light source device according to claim 7, wherein the electrically conductive material comprises any one of a metal paste, an adhesive containing metal filler as solid particles, and an anisotropically electrically conductive elastic body.

9. The light source device according to claim 1, wherein the light-emitting element comprises a light-emitting diode.

10. A projector, comprising:

a light source device according to claim 1 that projects illuminating light;

a light modulator illuminated by illuminating light from the light source device; and

a projection optical system projecting image light from the light modulator.

11. A projector, comprising:

a light source device for each color light according to claim 1 that emits illuminating light of each color;

a light modulator for each color that is illuminated by each illuminating light of the respective colors;

a light synthesizing member that synthesizes image light of color light from the light modulator of the respective colors; and

a projection optical system projecting image light that has undergone the light synthesizing member.