Patent ID: 9092221
Filing Date: 2015-07-28
Classification: G06F,G09G,Y02D

Abstract:
1. A touch display device, comprising: a display panel performing an image display operation in a display state; a touch controller performing a touch control operation in a working state; and a power supplier coupled to the touch controller and configured to provide an operation voltage to the touch controller; a power switch for switching between a turn-on state and a turn-off state; and a processor detecting state of the power switch and controlling the display panel and the power supplier based on the state of the power switch; wherein the power supplier comprises a switch unit with a control terminal receiving a switch signal from the processor, an input terminal receiving the operation voltage and an output terminal coupled to the touch controller: wherein when the processor detects that the power switch is in the turn-off state, the processor disables the switch signal to control the switch unit not to transmit the operation voltage to the output terminal of the switch unit such that the touch controller is in the non-working state; and wherein when the processor detects that the power switch is in the turn-on state the processor enables the switch signal to control the switch unit to transmit the operation voltage to the output terminal of the switch unit such that the touch controller receives the operation voltage and is in the working state; and wherein the switch unit comprises: a voltage divided and current limited circuit coupled to the control terminal of the switch unit; a buffer circuit receiving the switch signal through the voltage divided and current limited circuit and generating a buffer output signal based on the switch signal; and a first transistor comprising a control terminal receiving the buffer output signal, an input terminal coupled to the input terminal of the switch unit and an output terminal coupled to the output terminal of the switch unit; wherein when the processor enables the switch signal reversely, the buffer circuit generates the buffer output signal to close the first transistor; and wherein when the processor enables the switch signal, the buffer circuit generates the buffer output signal to turn on the first transistor.