Display panel and display apparatus
A display panel and a display apparatus. The display panel comprises an electronic-paper display unit and a display control circuit. The display control circuit comprises a capacitor energy storage module, an antenna module, a control module and a comparator, wherein the antenna module is connected to the capacitor energy storage module, and charges the capacitor energy storage module in response to a radio-frequency signal; the control module is connected to the capacitor energy storage module and the electronic-paper display unit; the comparator is connected to the control module and the electronic-paper display unit; and when the voltage of the capacitor energy storage module is greater than a preset threshold voltage, power is supplied to the electronic-paper display unit.
1 . A display panel, comprising:
an electronic paper display unit; and
a display control circuit;
wherein the display control circuit comprises:
a capacitor energy storage module;
an antenna module connected with the capacitor energy storage module and configured to charge the capacitor energy storage module in response to a radio frequency signal;
a control module connected with the capacitor energy storage module and the electronic paper display unit, wherein the capacitor energy storage module is configured to supply power to the control module, and the control module is configured to transmit display data to the electronic paper display unit; and
a comparator connected with the control module and the electronic paper display unit, wherein the comparator is configured to supply power to the electronic paper display unit when a voltage of the capacitor energy storage module is greater than a preset threshold voltage, and the electronic paper display unit refreshes display contents according to the display data;
wherein the electronic paper display unit comprises an electronic ink layer and a drive transistor whose gate charge is less than a preset charge threshold and whose parasitic capacitance is less than a preset capacitance threshold.
2 . The display panel according to claim 1 , wherein the radio frequency signal is emitted by a terminal device provided with a signal transmitter, and the terminal device comprises a door control, a computer or a mobile phone.
3 . The display panel according to claim 2 , wherein the antenna module comprises an induction coil configured to convert the radio frequency signal into an electrical signal to charge the capacitor energy storage module.
4 . The display panel according to claim 1 , wherein a refresh frequency of the electronic paper display unit is less than a preset threshold frequency, and the preset threshold frequency comprises 9 frames/second, 10 frames/second, 12 frames/second, 15 frames/second, or 20 frames/second.
5 . The display panel according to claim 1 , wherein the comparator has a quiescent current less than 0.9 μA and a workload capacity greater than 15 mA.
6 . The display panel according to claim 1 , wherein the electronic ink layer comprises a microcapsule structure comprising white particles, black particles and electrophoretic ink.
7 . The display panel according to claim 6 , wherein,
the electrophoretic ink is transparent;
a material of the white particles is titanium dioxide TiO 2 with positive charges; and
a material of the black particles is carbon black with negative charges.
8 . The display panel according to claim 1 , wherein the electronic ink layer comprises a microcapsule structure comprising black particles, red particles, and electrophoretic ink.
9 . The display panel according to claim 8 , wherein,
the electrophoretic ink is transparent; and
a material of the black particles is carbon black with negative charges.
10 . The display panel according to claim 1 , wherein the electronic paper display unit further comprises an electrode layer and a pixel electrode layer arranged oppositely,
wherein the electronic ink layer is arranged between the electrode layer and the pixel electrode layer.
11 . The display panel according to claim 1 , wherein the preset threshold voltage is not less than 2.3 V.
12 . The display panel according to claim 1 , wherein the antenna module comprises an induction coil configured to convert the radio frequency signal into an electrical signal to charge the capacitor energy storage module.
13 . The display panel according to claim 1 , wherein the capacitor energy storage module comprises a patch capacitor.
14 . The display panel according to claim 1 , wherein the control module comprises a micro control unit and a near field communication chip, the micro control unit is configured to control an operating state of the near field communication chip, and the near field communication chip generates the display data according to the radio frequency signal.
15 . The display panel according to claim 14 , wherein the micro control unit communicates with the near field communication chip through an Inter-Integrated Circuit (I 2 C) bus.
16 . The display panel according to claim 14 , wherein the control module further comprises a flash memory unit configured to store the display data.
17 . The display panel according to claim 16 , wherein the flash memory unit communicates with the micro control unit through a Serial Peripheral interface (SPI) bus.
18 . The display panel according to claim 16 , wherein the flash memory unit is a flash memory, comprising a NAND flash memory, a vertical NAND flash memory (VNAND), and a NOR flash memory.
19 . A display apparatus comprising the display panel according to claim 1 .