Patent ID: 7591563

Claim:
A display device comprising: a display panel having a display area for displaying images; a backlight device coupled to the display panel, including: a circuit board; a plurality of light sources distributed on the circuit board with a light distribution surface area; and a device case enclosing the plurality of light sources, wherein the device case comprises a plurality of sidewalls having an inner surface configured to reflect light from the plurality of light sources, wherein each sidewall of the device case and the circuit board form an angle in the range of about 60 degrees to less than 90 degrees; and at least one light-diffusing plate optically coupled between the plurality of light sources and the display panel, the at least one light-diffusing plate having a light incidence area for receiving light from the plurality of light sources, wherein the light incidence area of the at least one light-diffusing plate is substantially equal to the display area, and the light distribution surface area is greater than the light incidence area.