Patent ID: 11906847
Assignee: LMS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F  G

Claim 5:
6. The backlight unit according to claim 1, wherein:
a cross-section of the prism of the first pattern layer is a first triangular shape, and a cross-section of the pyramid of the second pattern layer is a second triangular shape,
the prism of the first pattern layer forms a first apex angle defined as an angle between two opposing sides among three sides of the first triangular shape,
the first apex angle is in a range of 70° to 150°,
the pyramid of the second pattern layer forms a second apex angle defined as an angle between two opposing sides of the four sides of the pyramid shape, and
the second apex angle is in a range of 70° to 150°.