Surface light source device, edge-lit type backlight module and display device
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F21K-009/61
F21K-009/68
F21V-008/00
출원번호
US-0810017
(2017-11-11)
등록번호
US-10234080
(2019-03-19)
우선권정보
CN-2017 1 0187820 (2017-03-27)
발명자
/ 주소
Huang, Wei
Hua, Ming Cheng
출원인 / 주소
KAISTAR LIGHTING (XIAMEN) CO., LTD.
대리인 / 주소
Hemisphere Law, PLLC
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
A surface light source device is additionally disposed with a light guide bar between a light-emitting source and a light guide film to collect rays emitted from the light-emitting source and transmit the rays to a light incident surface of the light guide film. A thickness of the light guide bar is
A surface light source device is additionally disposed with a light guide bar between a light-emitting source and a light guide film to collect rays emitted from the light-emitting source and transmit the rays to a light incident surface of the light guide film. A thickness of the light guide bar is designed to be gradually tapered to achieve the objective of reduction in the thickness of a conventional light guide plate. Moreover, the surface light source device can be applied in an edge-lit type backlight module and a display device, as well as in the illumination field.
대표청구항▼
1. A surface light source device, comprising a light-emitting source; wherein the surface light source device further comprises a light guide film and a light guide bar; the light guide film has a light incident surface and a second surface adjacent to the light incident surface, the light guide bar
1. A surface light source device, comprising a light-emitting source; wherein the surface light source device further comprises a light guide film and a light guide bar; the light guide film has a light incident surface and a second surface adjacent to the light incident surface, the light guide bar is configured for collecting rays emitted from the light-emitting source and transmitting the rays to the light incident surface of the light guide film, the light guide film is configured for converting the rays to be a surface light source and outputting the surface light source from the second surface; the light guide bar has a first end and an opposite second end, the light-emitting source is disposed on the first end, the light guide film is disposed on the second end, the light incident surface of the light guide film faces toward the light guide bar, and a thickness of the second end gradually decreases along a direction approaching the light guide film; wherein the first end is defined with a first groove and a bottom of the first groove is disposed with a first convex lens structure, the second end is defined with a second groove and a bottom of the second groove is disposed with a second convex lens structure, a convex surface of the first convex lens structure faces toward the light-emitting source, and a convex surface of the second convex lens structure faces toward the light incident surface of the light guide film. 2. The surface light source device according to claim 1, wherein the light-emitting source is inserted in the first groove, and the light-emitting source is a LED light bar. 3. The surface light source device according to claim 1, wherein an end of the light guide film with the light incident surface is fixed in the second groove. 4. The surface light source device according to claim 1, wherein a thickness of the first end gradually decreases along a direction departing from the light guide film, the light guide bar further comprises an intermediate section connected between the first end and the second end, and the intermediate section substantially is rectangular. 5. The surface light source device according to claim 4, wherein the light guide film has a third surface opposite to the second surface and adjacent to the light incident surface, a side surface of the first end located at a side of the second surface of the light guide film is a curved surface, and a side surface of the first end located at a side of the third surface of the light guide film is a planar surface. 6. The surface light source device according to claim 1, wherein the light-emitting source is located in a focal plane of the first convex lens structure, and the light incident surface is located in a focal plane of the second convex lens structure. 7. The surface light source device according to claim 1, wherein a portion of the second surface of the light guide film adjacent to the light incident surface is disposed with a reflective material layer and a portion of the second surface far away from the light incident surface is not disposed with the reflective material layer to make the second surface locally emit light. 8. An edge-lit type backlight module, comprising an optical film set and a surface light source device; the surface light source device comprising a light-emitting source, a light guide film and a light guide bar; the light guide film having a light incident surface and a second surface adjacent to the light incident surface, the light guide bar being configured for collecting rays emitted from the light-emitting source and transmitting the rays to the light incident surface of the light guide film, the light guide film being configured for converting the rays to be a surface light source and outputting the surface light source from the second surface; the light guide bar having a first end and an opposite second end, the light-emitting source being disposed on the first end, the light guide film being disposed on the second end, the light incident surface of the light guide film facing toward the light guide bar, the second end is gradually tapered in a direction approaching the light guide film; the second surface of the light guide film of the surface light source device facing toward the optical film set; the light guide film of the surface light source device having a third surface opposite to the second surface and adjacent to the light incident surface, and the third surface being disposed with a plurality of dots; wherein the first end is defined with a first groove and a bottom of the first groove is disposed with a first convex lens structure, the second end is defined with a second groove and a bottom of the second groove is disposed with a second convex lens structure, a convex surface of the first convex lens structure faces toward the light-emitting source, and a convex surface of the second convex lens structure faces toward the light incident surface of the light guide film. 9. A display device, comprising a non-luminous display panel and an edge-lit type backlight module; the edge-lit type backlight module comprising an optical film set and a surface light source device, the surface light source device comprising a light-emitting source, further comprising a light guide film and a light guide bar; the light guide film having a light incident surface and a second surface adjacent to the light incident surface, the light guide bar being configured for collecting rays emitted from the light-emitting source and transmitting the rays to the light incident surface of the light guide film, the light guide film is configured for converting the rays to be a surface light source and outputting the surface light source from the second surface; the light guide bar having a first end and an opposite second end, the light-emitting source being disposed on the first end, the light guide film being disposed on the second end, the light incident surface of the light guide film facing toward the light guide bar, a thickness of the second end gradually decreasing along a direction approaching the light guide film; the second surface of the light guide film of the surface light source device facing toward the optical film set; the light guide film of the surface light source device having a third surface opposite to the second surface and adjacent to the light incident surface, and the third surface being disposed with a plurality of dots; the non-luminous display panel being located at a side of the optical film set far away from the light guide film; wherein the first end is defined with a first groove and a bottom of the first groove is disposed with a first convex lens structure, the second end is defined with a second groove and a bottom of the second groove is disposed with a second convex lens structure, a convex surface of the first convex lens structure faces toward the light-emitting source, and a convex surface of the second convex lens structure faces toward the light incident surface of the light guide film. 10. The edge-lit type backlight module according to claim 8, wherein the light-emitting source is inserted in the first groove, and the light-emitting source is a LED light bar. 11. The edge-lit type backlight module according to claim 8, wherein an end of the light guide film with the light incident surface is fixed in the second groove. 12. The edge-lit type backlight module according to claim 8, wherein a thickness of the first end gradually decreases along a direction departing from the light guide film, the light guide bar further comprises an intermediate section connected between the first end and the second end, and the intermediate section substantially is rectangular. 13. The edge-lit type backlight module according to claim 12, wherein a side surface of the first end located at a side of the second surface of the light guide film is a curved surface, and a side surface of the first end located at a side of the third surface of the light guide film is a planar surface. 14. The edge-lit type backlight module according to claim 8, wherein the light-emitting source is located in a focal plane of the first convex lens structure, and the light incident surface is located in a focal plane of the second convex lens structure. 15. The display device according to claim 9, wherein the light-emitting source is inserted in the first groove, and the light-emitting source is a LED light bar. 16. The display device according to claim 9, wherein an end of the light guide film with the light incident surface is fixed in the second groove. 17. The display device according to claim 9, wherein a thickness of the first end gradually decreases along a direction departing from the light guide film, the light guide bar further comprises an intermediate section connected between the first end and the second end, and the intermediate section substantially is rectangular. 18. The display device according to claim 17, wherein a side surface of the first end located at a side of the second surface of the light guide film is a curved surface, and a side surface of the first end located at a side of the third surface of the light guide film is a planar surface. 19. The display device according to claim 9, wherein the light-emitting source is located in a focal plane of the first convex lens structure, and the light incident surface is located in a focal plane of the second convex lens structure.
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이 특허에 인용된 특허 (2)
Dejima,Norihiro; Kurihara,Makoto; Sado,Takayasu; Honma,Katsunori, Illumination device having elliptical body and display device using the same.
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