Patent ID: 8441471

Claim:
A display device comprising: a light source device including: a light source arranged to emit light; and a reflection sheet arranged to reflect the light emitted from the light source; a display panel arranged to display an image; and a control mechanism arranged to control the display panel such that a reflectance of a portion of a surface of the reflection sheet of the light source device is changed with gradation in response to light and dark of portions of the image displayed on the display panel; wherein the light source device further comprises: a first storing mechanism and a second storing mechanism arranged to store signals generated by the control mechanism; a calculation mechanism arranged to calculate reflectances of portions of the reflection sheet based on the signals that are stored in the first storing mechanism and the second storing mechanism; a third storing mechanism arranged to store the reflectances calculated by the calculation mechanism; and a reflectance control mechanism arranged to control the reflection sheet based on the reflectances stored in the third storing mechanism.