What is claimed is:
1. A display controller comprising;
means for writing display information to a port;
means for reading said display information from the port;
means for activating a display based upon said information; and
means for reducing a refresh rate at which said display is activated based upon a quantity of said information to be written.
2. The display controller of claim 1 further including a single-port memory connected to said port.
3. The display controller of claim 1 further including means for rendering graphics, wherein said display information is said rendered graphics.
4. The display controller of claim 1 wherein said display controller activates said display at a first refresh rate when there is no display information to be written to said port, said display controller activating said display at a second refresh rate less than said first refresh rate when a quantity of display information to be written exceeds a predetermined threshold.
5. A display system comprising;
a display having a matrix of pixels;
a single-port memory having a matrix of information, each associated with one of said pixels;
a display controller writing display information to said memory, said display controller reading said display information and activating said display based upon said display information at a refresh rate, said display controller reducing said refresh rate based upon a quantity of display information to be written to said memory.
6. The display system of claim 5 wherein said display controller renders graphics, said rendered graphics comprising said display information.
7. The display system of claim 6 wherein said display controller reduces said refresh rate based upon a quantity of graphics to be rendered.
8. The display system of claim 5 wherein said display is an ELD.
9. A method for driving a display including the steps of:
writing display information to a single-port memory;
reading said display information from the memory;
activating a display based upon said display information at a refresh rate; and
reducing said refresh rate based upon a quantity of said display information to be written.
10. The method of claim 9 further including the steps of:
receiving a code; and
rendering graphics based upon said code, said display information comprising said rendered graphics.
11. The method of claim 9 further including the steps of:
activating said display at a first refresh rate when there are no graphics to be rendered; and
activating said display at a second refresh rate less than said first refresh rate when a quantity of graphics to be rendered exceeds a predetermined threshold.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A discharging apparatus for an electric vehicle, comprising:
an AC charging interface;
a charging connection device, having a first terminal connected with the AC charging interface of the electric vehicle and a second terminal connected with another electric vehicle, and configured to transmit an AC output from the AC charging interface to the another electric vehicle;
an instrument, configured to send a discharging preparation instruction after receiving a trigger signal;
a controller, configured to communicate with the instrument and to detect whether the charging connection device is connected with the AC charging interface after receiving the discharging preparation instruction, and if yes, to emit a PWM wave and to switch to an external discharging mode;
a battery manager, configured to communicate with the controller and to control an external discharging circuit in a high-voltage distribution box of the electric vehicle after the controller switches to the external discharging mode;
a power battery, connected with the high-voltage distribution box and configured to provide a DC via the external discharging circuit in the high-voltage distribution box;
wherein the controller is configured to detect whether the another electric vehicle is fully charged, and if no, the controller converts the DC provided by the external discharging circuit into the AC and to output the AC to the AC charging interface so as to discharge to the another electric vehicle.
2. The discharging apparatus for an electric vehicle according to claim 1, wherein the instrument and the controller communicate via a CAN bus of a local area network of the controller, and the controller and the battery manager communicate via the CAN bus.
3. The discharging apparatus for an electric vehicle according to claim 1, wherein the charging connection device comprises:
a first charging gun, located at the first terminal of the charging connection device and connected with the AC charging interface of the electric vehicle;
a second charging gun, located at the second terminal of the charging connection device and connected with an AC charging interface of the another electric vehicle.
4. The discharging apparatus for an electric vehicle according to claim 1, wherein after it is determined that the charging connection device is connected with the AC charging interface, the controller emits the PWM wave via a CP pin.
5. The discharging apparatus for an electric vehicle according to claim 1, wherein the controller is configured to determine whether an electric vehicle is fully charged by detecting a voltage of a CP pin, and if the voltage of the CP pin reaches a predetermined voltage, it is determined that the another electric vehicle has been fully charged.
6. The discharging apparatus for an electric vehicle according to claim 5, wherein the predetermined voltage is 6V.
7. The discharging apparatus for an electric vehicle according to claim 1, wherein the controller is further configured to detect whether the electric vehicle is currently in P gear after it is determined that the charging connection device is connected with the AC charging interface, and if yes, the controller switches to the external discharging mode.
8. The discharging apparatus for an electric vehicle according to claim 1, wherein the controller is further configured to detect in real-time whether an internal circuit of the controller has a fault and to detect in real-time whether the another electric vehicle has a fault during discharging.
9. The discharging apparatus for an electric vehicle according to claim 8, wherein the controller is further configured to stop outputting the AC if it is determined that the internal circuit has a fault andor the another electric vehicle has a fault.
10. The discharging apparatus for an electric vehicle according to claim 1, wherein the battery manager is further configured to detect in real-time a current electric quantity of the power battery and to detect in real-time whether the power battery has a fault, if it is determined the power battery has a fault, the battery manager sends a battery fault instruction to the controller, and the controller stops outputting the AC after receiving the battery fault instruction.
11. The discharging apparatus for an electric vehicle according to claim 1, wherein the controller is further configured to stop outputting the AC after receiving a discharging finish instruction from the instrument.
12. The discharging apparatus for an electric vehicle according to claim 1, wherein the controller is further configured to detect a current discharging current in real-time.
13. The discharging apparatus for an electric vehicle according to claim 1, wherein the controller is further configured to stop outputting the AC, if it is determined that the charging connection device is disconnected with the AC charging interface or the another electric vehicle is fully charged.
14. The discharging apparatus for an electric vehicle according to claim 1, wherein the controller is further configured to detect whether an electric quantity of the electric vehicle is greater than a predetermined value, and if yes, it is determined to allow the electric vehicle to externally discharge.
15. An electric vehicle, comprising a discharging apparatus for an electric vehicle, the discharging apparatus for an electric vehicle comprising:
an AC charging interface;
a charging connection device, having a first terminal connected with the AC charging interface of the electric vehicle and a second terminal connected with another electric vehicle, and configured to transmit an AC output from the AC charging interface to the another electric vehicle;
an instrument, configured to send a discharging preparation instruction after receiving a trigger signal;
a controller, configured to communicate with the instrument and to detect whether the charging connection device is connected with the AC charging interface after receiving the discharging preparation instruction, and if yes, to emit a PWM wave and to switch to an external discharging mode;
a battery manager, configured to communicate with the controller and to control an external discharging circuit in a high-voltage distribution box of the electric vehicle to be connected after the controller switches to the external discharging mode;
a power battery, connected with the high-voltage distribution box and configured to provide a DC via the external discharging circuit in the high-voltage distribution box;
wherein the controller is configured to detect whether the another electric vehicle is fully charged, and if no, the controller converts the DC provided by the external discharging circuit into the AC and to output the AC to the AC charging interface so as to discharge to the another electric vehicle.
16. The electric vehicle according to claim 15, wherein after it is determined that the charging connection device is connected with the AC charging interface, the controller emits the PWM wave via a CP pin.
17. The electric vehicle according to claim 15, wherein the controller is configured to determine whether the another electric vehicle is fully charged by detecting a voltage of a CP pin, and if the voltage of the CP pin reaches a predetermined voltage, it is determined that the another electric vehicle has been fully charged.
18. The electric vehicle according to claim 15, wherein the controller is further configured to detect whether the electric vehicle is currently in P gear after it is determined that the charging connection device is connected with the AC charging interface, and if yes, the controller switches to the external discharging mode.
19. The electric vehicle according to claim 15, wherein the controller is further configured to detect in real-time whether an internal circuit of the controller has a fault and to detect in real-time whether the another electric vehicle has a fault during discharging.
20. The electric vehicle according to claim 19, wherein the controller is further configured to stop outputting the AC if it is determined that the internal circuit has a fault andor the another electric vehicle has a fault.