Patent ID: 7527414
Filing Date: 2009-05-05
Classification: G02B

Abstract:
1. A direct-type backlight module, comprising: a housing; a light-guide plate disposed in said housing, said light-guide plate having a first surface and a second surface opposite the first surface, said first surface having a first groove; a light source situated in said housing below the first groove of the first surface of said light-guide plate and arranged such that light emitted by the light source is reflected by said first groove, a plurality of diffuser elements disposed on said second surface of said light-guide plate, said diffuser elements to diffuse light in said light-guide plate; and wherein regions covered by said diffuser elements are unevenly distributed on said second surface such that concentrated regions of said diffuser elements are formed at distances away from said light source of between one-eighth to three-eighths of a pitch of the light source.