Patent ID: 8523388

Claim:
A planar LED lighting apparatus, comprising: a housing, having a light output face, a reflective face, a first side wall, and a second side wall, wherein said reflective face is opposing said light output face, said first side wall and said second side wall are opposing each other and located between said light output face and said reflective face; two sets of LEDs, mounted on said first side wall and said second side wall, wherein each set of said two sets of LEDs has an optical axis extending toward said reflective face and forming an angle with said reflective face, and said angle is larger than 0 degree and smaller than or equal to 30 degrees; a first supporter mounted on said first side wall and a second supporter mounted on said second side wall, wherein both of said first side wall and said second side wall have an inclined surface for mounting said two sets of LEDs, so that said optical axis of each set of said two sets of LEDs extends toward said reflective face; and a first half-mirror placed near a light emitting face of one set of said two sets of LEDs on said first side wall, and a second half-mirror placed near a light emitting face of the other set of said two sets of LEDs on said second side wall.