Patent ID: 7213962
Filing Date: 2007-05-08
Classification: G02B,G09F,Y10S

Abstract:
1. A high-efficiency circuit-equipped light emitting board, comprising: a main body including an inner frame having a holding recess, and an outer frame having an opening; the outer frame being joined to the inner frame with the opening facing the holding recess; the main body having a display board, which allows light to travel through, and has signs adhered thereto; the display board having a light-passable plate disposed on a front thereof; the display board being disposed between the frames with an edge of the opening preventing it from falling out of the outer frame; the indicating board having reflective surfaces on both upper and lower edges thereof; the display board having holes formed on the upper edge thereof and facing correspondingly ones of a set of gaps formed in the inner frame; and a driving circuit; the driving circuit having two power input terminals respectively connected to a first end of a first resistor and a first end of a second resistor; other ends of the resistors being electrically connected to a first terminal of a semi-conductor switch; a second terminal of the semi-conductor switch being connected to a first one of the power input terminals of the driving circuit, and a third terminal of the semi-conductor switch being connected to a combination of a resistor and a light-emitting device, which is connected to a second one of the power input terminals of the driving circuit at other end thereof; thus, said light-emitting board emits light, which then travels through the gaps of said inner frame and the holes of the display board, and finally travels outside through both the display board and the light-passable plate for making the signs of the board visible.