IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0010153
(2011-01-20)
|
등록번호 |
US-8599504
(2013-12-03)
|
우선권정보 |
KR-10-2008-0071907 (2008-07-23) |
발명자
/ 주소 |
- Yoon, Ki Cheol
- Shin, Dong Yoon
- Ahn, Ji Soo
- Kang, Sang Mi
- Byun, Kil Seuk
- Kim, Seong Joong
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
2 |
초록
▼
A prism sheet, a backlight unit, and a liquid crystal display device, the prism sheet including a transparent substrate; and at least one prism on the transparent substrate, wherein a refractive index (n) and a basic angle (θ) of the at least one prism satisfies the following condition: 1≦n/sin θ≦4.
A prism sheet, a backlight unit, and a liquid crystal display device, the prism sheet including a transparent substrate; and at least one prism on the transparent substrate, wherein a refractive index (n) and a basic angle (θ) of the at least one prism satisfies the following condition: 1≦n/sin θ≦4.
대표청구항
▼
1. A prism sheet, comprising: a transparent substrate; andat least one prism on the transparent substrate,wherein a refractive index (n) and a basic angle (θ) of the at least one prism satisfies the following condition: 1≦n/sin θ≦4,wherein the at least one prism has a lengthwise wave pattern, such t
1. A prism sheet, comprising: a transparent substrate; andat least one prism on the transparent substrate,wherein a refractive index (n) and a basic angle (θ) of the at least one prism satisfies the following condition: 1≦n/sin θ≦4,wherein the at least one prism has a lengthwise wave pattern, such that a height of the prism continuously or discontinuously changes along a length of the prism, and a width of the prism continuously or discontinuously changes along the length of the prism, andwherein the lengthwise wave pattern has a repetition period, the repetition period of the lengthwise wave pattern being about 50 to about 100 times an average height of the prism. 2. The prism sheet as claimed in claim 1, wherein: the refractive index (n) is about 1.5 to about 1.7, andthe basic angle (θ) is about 30° to 60°. 3. The prism sheet as claimed in claim 2, wherein the at least one prism has a triangular shaped cross-section. 4. The prism sheet as claimed in claim 3, wherein a vertical angle of the at least one prism is about 60° to 115°. 5. The prism sheet as claimed in claim 3, wherein: a width of a base of the at least one prism is about 25 μm to 1 mm, anda height of the at least one prism is about 5 μm to 600 μm. 6. The prism sheet as claimed in claim 1, wherein the transparent substrate and at least one prism are arranged to have light incident on the transparent substrate before the at least one prism. 7. A back light unit comprising a prism sheet, the prism sheet including: a transparent substrate; andat least one prism on the transparent substrate,wherein a refractive index (n) and a basic angle (θ) of the at least one prism satisfies the following condition: 1≦n/sin θ≦4,wherein the at least one prism has a lengthwise wave pattern, such that a height of the prism continuously or discontinuously changes along a length of the prism, and a width of the prism continuously or discontinuously changes along the length of the prism, andwherein the lengthwise wave pattern has a repetition period, the repetition period of the lengthwise wave pattern being about 50 to about 100 times an average height of the prism. 8. The back light unit as claimed in claim 7, wherein: the refractive index (n) is about 1.5 to about 1.7, andthe basic angle (θ) is about 30° to 60°. 9. The back light unit as claimed in claim 7, wherein the at least one prism has a triangular shaped cross-section. 10. The back light unit as claimed in claim 9, wherein a vertical angle of the at least one prism is about 60° to 115°. 11. The back light unit as claimed in claim 9, wherein: a width of a base of the at least one prism is about 25 μm to 1 mm, anda height of the at least one prism is about 5 μm to 600 μm. 12. A liquid crystal display device comprising the back light unit as claimed in claim 7. 13. The prism sheet as claimed in claim 7, wherein the transparent substrate and at least one prism are arranged to have light incident on the transparent substrate before the at least one prism.
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