Display apparatus, display drive circuit and driving method of electronic paper display unit

A display apparatus, comprising an electronic paper display unit and a display drive circuit of an electronic paper display unit, wherein the display drive circuit comprises a display control circuit and the display control circuit comprises:

• a capacitor unit;
• a radio frequency circuit, connected to the capacitor unit and comprising an induction circuit and a communication circuit, wherein the induction circuit is configured to charge the capacitor unit in response to a radio frequency signal of a terminal device;
• a voltage collection circuit, connected to the capacitor unit, and configured to collect a voltage of the capacitor unit;
• and
• a control circuit, connected to the radio frequency circuit, the capacitor unit and the voltage collection circuit, and configured to perform a transmission action when the voltage of the capacitor unit reaches an operating threshold voltage of the electronic paper display unit;
• turn off the voltage collection circuit and the communication circuit after the transmission action is completed;
• perform a refresh action when the voltage of the capacitor unit reaches a refresh threshold voltage of the electronic paper display unit and control the electronic paper display unit to be powered off after the refresh action is completed,
• wherein the refresh threshold voltage is greater than the operating threshold voltage;
• the transmission action comprises:
• controlling the communication circuit to transmit image information sent by the terminal device to the electronic paper display unit;
• and
• the refresh action comprises:
• controlling the electronic paper display unit to update a display content according to the image information.

A display drive method of an electronic paper display unit, applied to a display drive circuit of an electronic paper display unit, wherein the display drive circuit comprises a display control circuit and the display control circuit comprises:

• a capacitor unit;
• a radio frequency circuit, connected to the capacitor unit and comprising an induction circuit and a communication circuit, wherein the induction circuit is configured to charge the capacitor unit in response to a radio frequency signal of a terminal device;
• a voltage collection circuit, connected to the capacitor unit, and configured to collect a voltage of the capacitor unit and a control circuit, connected to the radio frequency circuit, the capacitor unit and the voltage collection circuit, and configured to perform a transmission action when the voltage of the capacitor unit reaches an operating threshold voltage of the electronic paper display unit turn off the voltage collection circuit and the communication circuit after the transmission action is completed;
• perform a refresh action when the voltage of the capacitor unit reaches a refresh threshold voltage of the electronic paper display unit and control the electronic paper display unit to be powered off after the refresh action is completed, wherein the refresh threshold voltage is greater than the operating threshold voltage;
• the transmission action comprises:
• controlling the communication circuit to transmit image information sent by the terminal device to the electronic paper display unit and the refresh action comprises:
• controlling the electronic paper display unit to update a display content according to the image information, and the display drive method comprises:
• charging the capacitor unit in response to a radio frequency signal of a terminal device through the induction circuit;
• collecting a voltage of the capacitor unit by using the voltage collection circuit;
• controlling the communication circuit to transmit image information sent by the terminal device to the electronic paper display unit, in response to that the voltage of the capacitor unit reaches an operating threshold voltage of the electronic paper display unit;
• turning off the voltage collection circuit and the communication circuit;
• controlling the electronic paper display unit to update a display content according to the image information, in response to that the voltage of the capacitor unit reaches a refresh threshold voltage of the electronic paper display unit, wherein the refresh threshold voltage is greater than the operating threshold voltage;
• and
• controlling the electronic paper display unit to be powered off.