Light guide plates and backlight module
AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.
InventorsHE ZHANG, JUN ZHU, YAN ZHAO, GUO-FAN JIN
Life of this patent
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Abstract
A light guide plate includes a body having a bottom surface and a light output surface opposite to the bottom surface. A reflector is located on the light output surface opposite to the center of the bottom surface. The reflector is a cavity concaved from the light output surface to the inside of the body. A plurality of scattering dots are located on the bottom surface. The scattering dots are arranged in the form of a plurality of concentric circles around the center of the bottom surface. The number of the scattering dots is defined based on a radius of the circle they reside on, and the radius of the circle is greater than or substantially equal to 4 millimeter.
Claims20
A light guide plate, comprising:
- a body having a bottom surface having a center and a light output surface;
- a reflector located on the light output surface and opposite to the center, the reflector is a cavity;
- and
- a plurality of scattering dots located on the bottom surface, the scattering dots are arranged in the form of a plurality of concentric circles around the center, and the number of the scattering dots is defined based on a radius of the circle, the radius of the circle is greater than or substantially equal to 4 millimeter.
A light guide plate, comprising:
- a body having a bottom surface having a center, and a light output surface opposite to the bottom surface;
- and
- a plurality of scattering dots located on the bottom surface, the scattering dots are arranged in the form of a plurality of concentric circles around the center, and the number of the scattering dots for each concentric circle ‘e’ is defined by the following formula:
- e=|4[a1×(r−a2)×(r−a3)]|
- wherein, ‘e’ is the number of the scattering dots;
- ‘r’ is the radius of the circle and r≧4 millimeter;
- ‘a1’, ‘a2’ and ‘a3’ are constant, 0.05≦a1≦01, a2≧6, and a3≦12.
A backlight module comprising:
- a light source;
- a body having a bottom surface having a center and a light output surface opposite to the bottom surface, the light source is located adjacent to the center of bottom surface;
- a reflector located on the light output surface opposite to the center, and the reflector;
- and
- a plurality of scattering dots located on the bottom surface, the scattering dots are arranged in the form of a plurality of concentric circles around the center, and the number of the scattering dots is defined based on a radius of the circle, and the radius of the circle is greater than or substantially equal to 4 millimeter.
Dependencies are inferred from the claim text.