Hong Kong Applied Science and Technology Research Institute Company, Limited

Kwan Wah Ng

Ying Liu

Yaojun Feng

Shou-Lung Chen

Danding Huang

Shou Lung Chen

Cheng Jung Tsai

A light guiding strip and a double-sided planar light apparatus are provided. According to one embodiment of the present invention, the double-sided planar light apparatus includes a plurality of light guiding strips, wherein the plurality of light guiding strips are positioned in a planar arrangement, each of the plurality of light guiding strips including a first plurality of light emitting surfaces disposed toward a first direction and a second plurality of light emitting surfaces disposed toward a second direction, each of the plurality of light guiding strips further including a first end and a second end configured to receive light, wherein the plurality of light guiding strips emit light from the first and second plurality of light emitting surfaces. Reflectors and light diffusion patterns on the light guiding strips provide control and independence over the two sides of the planar light apparatus.

Light guiding strip and double-sided planar light apparatus

Apparatuses for backlighting and manufacturing processes thereof are disclosed. There is provided a backlight module. The backlight module comprises a double-sided circuit board with thermal conducting material as one of the core layers; a plurality of light source components mounted on the first surface of the circuit board; and, a plurality of electronic components mounted on the second surface of the circuit board. The thermal conducting core layer discharges heat generated by the light source components. The circuit board has at least one window on the surface layer at the second surface to expose the thermal conducting core layer for thermal dissipation. As such, the component heights on the illuminating side of the circuit board are unified, and the reflector can be made as a smooth planar sheet to provide a more uniform backlight illumination compared to a single-side circuit board design. Further, such an arrangement reduces the complexity in manufacturing the reflector and hence the cost thereof.

Backlighting apparatus and manufacturing process

Growing community of inventors

Hong Kong, China

Kwan Wah Ng