Light source assembly and touch screen device having the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F21V-007/00
F21V-007/04
출원번호
US-0089461
(2011-04-19)
등록번호
US-8517564
(2013-08-27)
우선권정보
KR-10-2010-0103389 (2010-10-22)
발명자
/ 주소
Kim, Joong-Hyun
Ha, Ju-Hwa
Lee, Kang-Woo
출원인 / 주소
Samsung Display Co., Ltd.
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
1인용 특허 :
2
초록▼
A light source assembly includes first light sources emitting first light in a first wavelength range, second light sources emitting second light in a second wavelength range which is at least partially different from the first wavelength range, and an optical member on which light emitted from the
A light source assembly includes first light sources emitting first light in a first wavelength range, second light sources emitting second light in a second wavelength range which is at least partially different from the first wavelength range, and an optical member on which light emitted from the first light sources and the second light sources is incident. A distance between adjacent first light sources, and a distance between adjacent second light sources is defined as an average pitch. The average pitch of the second light sources arranged in a specific direction, is larger than the average pitch of the first light sources arranged in the specific direction. The optical member has a reflectance with respect to the second light, which is larger than a reflectance with respect to the first light.
대표청구항▼
1. A light source assembly comprising: first light sources emitting first light in a first wavelength range, a distance between adjacent first light sources being a first average pitch;second light sources emitting second light in a second wavelength range which is at least partially different from
1. A light source assembly comprising: first light sources emitting first light in a first wavelength range, a distance between adjacent first light sources being a first average pitch;second light sources emitting second light in a second wavelength range which is at least partially different from the first wavelength range, a distance between adjacent second light source being a second average pitch; andan optical member on which lights emitted from the first light sources and the second light sources is incident,whereinthe first light sources and the second light sources are arranged on substantially a same plane,the optical member is in a light emitting path of the first light sources and the second light sources,the second average pitch of the second light sources arranged in a specific direction, is larger than the first average pitch of the first light sources arranged in the specific direction,a ratio of the first average pitch of the first light sources, to a separation distance between the optical member and the first light sources, is smaller than 1, anda ratio of the second average pitch of the second light sources, to a separation distance between the optical member and the second light sources, is larger than 1, anda reflectance of the optical member with respect to the second light, is larger than a reflectance of the optical member with respect to the first light. 2. The light source assembly of claim 1, wherein the second average pitch of the second light sources is 1.2 times to 3 times the first average pitch of the first light sources. 3. The light source assembly of claim 1, wherein the first wavelength range includes a wavelength range of visible light, andthe second wavelength range includes a wavelength range of infrared light. 4. The light source assembly of claim 3, wherein the reflectance of the optical member with respect to the second light emitted from the second light sources ranges from about 30% to about 75%. 5. The light source assembly of claim 1, wherein the first light sources and the second light sources are point light sources. 6. The light source assembly of claim 1, wherein the optical member comprises a first refractive layer and a second refractive layer alternating in a light emitting direction of the first and second light sources, andthe first refractive layer has a first refractive index, and the second refractive layer has a second refractive index larger than the first refractive index. 7. The light source assembly of claim 6, wherein the first light emitted from the first light sources and the second light emitted from the second light sources, is incident on the second refractive layer before being incident on the first refractive layer. 8. The light source assembly of claim 6, wherein the first refractive layer includes one material selected from the group consisting of polymethylmethacrylate, metha styrene and poly styrene, andthe second refractive layer includes one material selected from the group consisting of polyethylene naphtalate, copolymer-polyethylene naphtalate, cyclic olefin polymer, polyethylene terephtalate and polycarbonates. 9. The light source assembly of claim 6, wherein the optical member further comprises a base member which includes the first refractive layer and the second refractive layer on a first surface thereof, wherein the base member further includes an optical function layer on a second surface opposite to the first surface which the first refractive layer and the second refractive layer are on. 10. A touch screen device comprising: a light source assembly comprising: first light sources emitting first light in a first wavelength range, a distance between adjacent first light sources being a first average pitch;second light sources emitting second light in a second wavelength range which is at least partially different from the first wavelength range, a distance between adjacent second light sources being a second average pitch; andan optical member on which lights emitted from the first light sources and the second light sources is incident,whereinthe first light sources and the second light sources are arranged on substantially a same plane,the optical member is in a light emitting path of the first light sources and the second light sources,a ratio of the first average pitch of the first light sources, to a separation distance between the optical member and the first light sources, is smaller than 1,a ratio of the second average pitch of the second light sources, to a separation distance between the optical member and the second light sources, is larger than 1,the second average pitch of the second light sources arranged in a specific direction, is larger than the first average pitch of the first light sources arranged in the specific direction, anda reflectance of the optical member with respect to the second light is larger than a reflectance of the optical member with respect to the first light; and a touch screen panel which receives light from the light source assembly. 11. The touch screen device of claim 10, wherein the second average pitch of the second light sources is 1.2 times to 3 times the first average pitch of the first light sources. 12. The touch screen device of claim 10, wherein the first wavelength range includes a wavelength range of visible light, andthe second wavelength range includes a wavelength range of infrared light. 13. The touch screen device of claim 12, wherein the reflectance of the optical member with respect to the second light emitted from the second light sources ranges from about 30% to about 75%. 14. The touch screen device of claim 10, wherein the first light sources and the second light sources are point light sources. 15. The touch screen device of claim 10, wherein the optical member comprises a first refractive layer and a second refractive layer alternating, andthe first refractive layer has a first refractive index, and the second refractive layer has a second refractive index larger than the first refractive index. 16. The touch screen device of claim 15, wherein the first refractive layer includes one material selected from the group consisting of polymethylmethacrylate, metha styrene and poly styrene, and the second refractive layer includes one material selected from the group consisting of polyethylene naphtalate, copolymer-polyethylene naphtalate, cyclic olefin polymer, polyethylene terephtalate and polycarbonates. 17. The touch screen device of claim 15, wherein the optical member further comprises a base member which includes the first refractive layer and the second refractive layer on a first surface thereof, wherein the base member further includes an optical function layer on a second surface opposite to the first surface which the first refractive layer and the second refractive layer are on. 18. The touch screen device of claim 10, wherein the touch screen panel includes a light receiving element. 19. The touch screen device of claim 18, wherein the touch screen panel further includes: a first display plate,a second display plate facing the first display plate, anda touch substrate provided on the second display plate, andthe light receiving element is within any one of the first display plate, the second display plate and the touch substrate.
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