Display device, method for driving same, and display system
A display device, a method for driving the same, and a display system are provided. In the display device, a drive circuit can first drive the display panel to display a target image containing a number of colors less than a number threshold in response to detecting that a host computer stops delivering image data (i.e., the screen is turned off), and then drive the display panel to enter a standby state. In this way, the display panel can be made to stably transition to the standby state upon screen-off of the host computer, thereby solving the problems of stalled display or abnormal display caused by the display panel being unable to enter the standby state reliably.
1. A display device, comprising a drive circuit and a display panel; wherein
the drive circuit is coupled to the display panel and coupled to a host computer, and is configured to transmit a drive signal to the display panel in response to detecting that the host computer stops delivering first image data, and transmit a standby instruction to the display panel upon transmitting the drive signal; and
the display panel is configured to display a target image in response to the drive signal, and switch from an operating state to a standby state in response to the standby instruction;
wherein a number of colors contained in the target image is less than a number threshold.
2. The display device according to claim 1 , wherein the target image is a single-color image.
3. The display device according to claim 2 , wherein the target image is a black image.
4. The display device according to claim 1 , wherein the drive signal carries image data of the target image.
5. The display device according to claim 1 , wherein the drive circuit is further configured to transmit a resume instruction carrying the first image data to the display panel in response to detecting that the host computer delivers the first image data when the display panel is in the standby state; and
the display panel is configured to switch from the standby state to the operating state in response to the resume instruction, and display an image based on the first image data upon switching to the operating state.
6. The display device according to claim 1 , wherein the drive circuit is configured to determine that the host computer stops delivering the first image data in response to not receiving image data delivered by the host computer within a target time period upon receipt of the first image data.
7. The display device according to claim 1 , wherein the drive circuit is configured to determine that the host computer stops delivering the first image data in response to a target instruction sent by the host computer, the target instruction being intended to instruct the host computer to stop delivering image data to the drive circuit.
8. The display device according to claim 1 , wherein both the drive circuit and the display panel comprise a mobile industry processor interface (MIPI), and the drive circuit is coupled to the display panel by the MIPI and transmits signals and instructions to the display panel by the MIPI.
9. The display device according to claim 1 , further comprising a first power supply circuit, a second power supply circuit, a control circuit, and an image acquisition assembly; wherein
the first power supply circuit is coupled to the drive circuit and the display panel, and is configured to supply power to the drive circuit and the display panel;
the second power supply circuit is coupled to the control circuit and the image acquisition assembly, and is configured to supply power to the control circuit and the image acquisition assembly;
the control circuit is further coupled to the drive circuit, the first power supply circuit, and the image acquisition assembly, and is configured to control operating states of the drive circuit and the first power supply circuit, and transmit second image data acquired by the image acquisition assembly to the drive circuit;
the drive circuit is further configured to transmit the first image data and the second image data received from the host computer to the display panel; and
the display panel is configured to display an image based on the first image data and the second image data.
10. The display device according to claim 9 , wherein the control circuit is a microcontroller unit.
11. The display device according to claim 9 , wherein the control circuit comprises a general-purpose input/output (GIPO) pin and a universal serial bus (USB) interface; and
the control circuit is coupled to the drive circuit by the GIPO pin, and coupled to the image acquisition assembly by the USB interface.
12. The display device according to claim 9 , wherein the control circuit is further configured to transmit a disable signal to the first power supply circuit in response to determining that the drive circuit is to switch from the operating state to the standby state, and transmit an enable signal to the first power supply circuit in response to determining that the drive circuit is to switch from the standby state to the operating state; and
wherein the first power supply circuit is configured to stop supplying power to the drive circuit in response to the disable signal, and continue supplying power to the drive circuit in response to the enable signal.
13. The display device according to claim 12 , wherein the target image is a black image;
the image data of the target image is carried by the drive signal;
the drive circuit is further configured to transmit the resume instruction carrying the first image data to the display panel in response to detecting that the host computer delivers the first image data when the display panel is in the standby state; and the display panel is further configured to switch from the standby state to the operating state in response to the resume instruction, and display an image based on the first image data upon switching to the operating state;
the drive circuit is configured to determine that the host computer stops delivering the first image data in response to image data delivered by the host computer being not received within a target time period upon receipt of the first image data; or determine that the first image data is stopped delivering by the host computer in response to a target instruction sent by the host computer, the target instruction being intended to instruct the host computer to stop delivering image data to the drive circuit;
both the drive circuit and the display panel comprise a mobile industry processor interface (MIPI), and the drive circuit is coupled to the display panel by the MIPI, and transmits signals and instructions to the display panel by the MIPI;
the control circuit is a microcontroller unit;
the control circuit comprises a universal input/output (GIPO) pin and a universal serial bus (USB) interface;
the control circuit is coupled to the drive circuit by the GIPO pin, and coupled to the image acquisition assembly by the USB interface;
the display device is an augmented reality device; and
the display panel is an organic light-emitting diode display panel, and a resolution of the display panel is greater than a resolution threshold.
14. The display device according to claim 1 , wherein the display device is an augmented reality device.
15. The display device according to claim 1 , wherein the display panel is an organic light-emitting diode display panel, and a resolution of the display panel is greater than a resolution threshold.
16. A method for driving a display device, comprising:
transmitting a drive signal to a coupled display panel in response detecting that first image data is stopped delivering by a coupled host computer, wherein the drive signal is intended to instruct the display panel to display a target image, a number of colors contained in the target image being less than a number threshold; and
transmitting a standby instruction to the display panel upon transmitting the drive signal, wherein the standby instruction is intended to instruct the display panel to switch from an operating state to a standby state.
17. The method according to claim 16 , further comprising:
transmitting a resume instruction carrying the first image data to the display panel in response to detecting that the host computer delivers the first image data by the host computer when the display panel is in the standby state, wherein the resume instruction is intended to instruct the display panel to switch from the standby state to the operating state, and display an image based on the first image data upon switch to the operating state.
18. A display system, comprising a host computer and a display device; wherein the display device comprising a drive circuit and a display panel; wherein
the host computer is coupled to the drive circuit, and is configured to deliver image data to the drive circuit;
the drive circuit is further coupled to the display panel, and is configured to transmit a drive signal to the display panel in response to detecting that the host computer stops delivering the first image data, and transmit a standby instruction to the display panel upon transmitting the drive signal; and
the display panel is configured to display a target image in response to the drive signal, and switch from an operating state to a standby state in response to the standby instruction;
wherein a number of colors contained in the target image is less than a number threshold.
19. The system according to claim 18 , wherein the display device further comprises a first power supply circuit, a second power supply circuit and a control circuit; wherein
the host computer is further coupled to the control circuit, the first power supply circuit, and the second power supply circuit, and is configured to communicate with the control circuit and supply power to the first power supply circuit and the second power supply circuit.
20. The system according to claim 18 , wherein the host computer is a mobile phone.