Patent ID: 7639360

Claim:
An examining device adapted to examining a transmittance of a display panel, comprising: a light source disposed on one side of the display panel and the display panel is located on a light path of the light source; a first polarizer disposed between the display panel and the light source, which is located on the light path of the light source; a photodetector disposed on the light path of the light source, wherein the photodetector and the first polarizer are respectively located on both sides of the display panel; a second polarizer disposed between the display panel and the photodetector, which is located on the light path of the light source; at least one first reflector disposed between the display panel and the second polarizer; and at least one second reflector disposed between the display panel and the first polarizer, and the quantity of the first reflector being equal to that of the second reflector, wherein light emitting from the light source successively passes via the first polarizer, the display panel, the first reflector, the display panel, the second reflector, the display panel and the second polarizer and then emits into the photodetector.