Patent ID: 9007349
Filing Date: 2015-04-14
Classification: G06F

Abstract:
1. A writing device, comprising: an emitter, having a first emitting terminal and a second emitting terminal, the first emitting terminal being configured to generate a first selective signal, a second selective signal and a third selective signal, the second emitting terminal being configured to generate a control signal; and a light emitting diode display panel, comprising: an array having a plurality of pixels arranged in a matrix, each pixel comprising a first light source, a second light source, a third light source, a driving circuit and a light detecting device, the light detecting device being used to receive the control signal and transmit the control signal to the driving circuit to turn on a corresponding pixel; and a receiver electrically connected with the driving circuit, the receiver being used to receive at least one of the first selective signal, the second selective signal and the third selective signal and transmit it to the driving circuit to turn on at least a corresponding one of the first light source, the second light source, and the third light source when the light detecting device of the corresponding pixel has received the control signal to turn on the corresponding pixel.