1. A display device drive circuit comprising:
at least two bias lines having different reference potentials;
a selector that selects one of the bias lines based on a grayscale signal; and
an output amplifier that is supplied with a reference potential of the one of the bias lines selected by the selector, generates a display signal, and supplies the display signal to a data line.
2. The display device drive circuit according to claim 1, wherein
the grayscale signal is an N-bit digital signal, and
the selector selects one of the bias lines based on a most significant bit of the grayscale signal.
3. The display device drive circuit according to claim 1, wherein
the grayscale signal is an N-bit digital signal, and
the selector selects one of the bias lines based on higher-order two bits of the grayscale signal.
4. The display device drive circuit according to claim 1, wherein the one of the bias lines selected by the selector supplies the reference potential to a constant current source element of the output amplifier.
5. The display device drive circuit according to claim 2, wherein
the bias lines include a high potential bias line and a low potential bias line, and
the selector selects the high potential bias line when the most significant bit of the grayscale signal is different from a most significant bit of a grayscale signal in a previous frame.
6. The display device drive circuit according to claim 2, wherein
the bias lines include a high potential bias line and a low potential bias line, and
the selector selects the low potential bias line when the most significant bit of the grayscale signal is equal to a most significant bit of a grayscale signal in a previous frame.
7. The display device drive circuit according to claim 1, wherein, in a case where a display device driven by the display device drive circuit uses a dot inversion driving method for displaying the same color with different polarities, the selector receives, as the grayscale signal, a signal indicating that the polarity is to be changed, and selects one of the bias lines based on the signal indicating that the polarity is to be changed.
8. The display device drive circuit according to claim 7, wherein
the bias lines include a high potential bias line and a low potential bias line, and
in a case where the display device is a normally black liquid crystal display device, the selector selects the high potential bias line when a previous frame is a positive white display and a current frame is a negative white display or when the previous frame is a negative white display and the current frame is a positive white display.
9. The display device drive circuit according to claim 7, wherein
the bias lines include a high potential bias line and a low potential bias line, and
in a case where the display device is a normally white liquid crystal display device, the selector selects the high potential bias line when a previous frame is a positive black display and a current frame is a negative black display or when the previous frame is a negative black display and the current frame is a positive black display.
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. An automatic emergency risk avoiding system for a self-service transaction, comprising:
an emergency signal generation module configured for: during a transaction process, collecting and identifying current environment information in a safety area of a self-service terminal, extracting user feature information in the collected current environment information, comparing the extracted user feature information in the collected current environment information with stored user comparison information, and issuing an emergency termination service signal in the case that the extracted user feature information in the collected current environment information is not consistent with the stored user comparison information, wherein the user comparison information is user feature information collected and stored when a user inputs a correct password for transaction; and
a self-service terminal control module for detecting and receiving the emergency termination service signal and controlling the self-service terminal to terminate the transaction in response to the emergency termination service signal.
2. The automatic emergency risk avoiding system for the self-service transaction according to claim 1, wherein the emergency signal generation module comprises:
a collection unit for collecting a frame of an image of the current environment information in the safety area of the self-service terminal from recording video periodically and when detecting the user inputs a correct password for transaction;
a user feature extraction unit for extracting the user feature information in the collected image of the current environment information in the safety area of the self-service terminal;
a storage unit for storing the user feature information collected and extracted when detecting the user inputs the correct password for transaction as the user comparison information; and
a comparison unit for comparing the user feature information extracted by the user feature extraction unit with the user comparison information in the storage unit, issuing the emergency termination service signal in the case that the user feature information extracted by the user feature extraction unit is not consistent with the user comparison information in the storage unit; otherwise, rescinding a previously issued emergency termination service signal.
3. The automatic emergency risk avoiding system for the self-service transaction according to claim 2, wherein the emergency signal generation module further comprises:
an identification processing unit for performing identification processing on the image of the current environment information collected by the collection unit, to identify whether there is only one person in the current safety area of the self-service terminal, issuing the emergency termination service signal in the case that there is more than one person, or in the case that there is only one person, sending the image on which the identification processing has been performed to the user feature extraction unit for user feature information extraction, and rescinding the previously issued emergency termination service signal.
4. The automatic emergency risk avoiding system for the self-service transaction according to claim 3, wherein the emergency signal generation module further comprises:
a user feature information temporary storage unit for temporarily storing the image of the user feature information extracted by the user feature extraction unit;
wherein in the case that the number of the images of the user feature information in the user feature information temporary storage unit is three, the comparison unit compares the three images of the user feature information with the user comparison information in parallel and issues the emergency termination service signal only in the case that all of the three images of the user feature information are not consistent with the user comparison information.
5. The automatic emergency risk avoiding system for the self-service transaction according to claim 3, wherein the emergency signal generation module further comprises:
an emergency termination service signal temporary storage unit for temporarily storing the emergency termination service signal issued by the identification processing unit or the comparison unit.
6. The automatic emergency risk avoiding system for self-service transaction according to claim 5, wherein the self-service terminal control module comprises:
a detection unit for detecting the emergency termination service signal in the emergency termination service signal temporary storage unit based on a set safety query point; and
a control unit for controlling the self-service terminal to terminate the current transaction in the case that the detection unit detects that the emergency termination service signal is present.
7. The automatic emergency risk avoiding system for self-service transaction according to claim 6, wherein in the case that the detection unit detects the emergency termination service signal, the detection unit enters into a wait state, instructs the control unit to control the self-service terminal to halt the current transaction, detects the emergency termination service signal in the emergency termination service signal temporary storage unit periodically within a time limit of the wait state, and notifies the control unit to control the self-service terminal to continue the current transaction only in the case that the detection unit detects that the emergency termination service signal is rescinded, or, the control unit controls the self-service terminal to terminate the current transaction in the case that the time limit expires.
8. The automatic emergency risk avoiding system for self-service transaction according claim 6, wherein the safety query point is a service point in the case that the self-service terminal has finished processing of an atomic service.
9. The automatic emergency risk avoiding system for self-service transaction according to claim 8, wherein the safety query point comprises a point after collecting of information of money withdrawal business has been finished and before an 8583 message packaged with the information of the money withdrawal business is prepared to be submitted to a background information center, and a point after a business program proceeds to a step that cashes have already been deployed and come out from a cashbox and before the cashes is prepared to be sent to a cash outlet.
10. The automatic emergency risk avoiding system for self-service transaction according to claim 8, wherein the safety query point comprises a point after collecting of transfer information of a transfer business has been finished and before an 8583 message packaged with the transfer information is prepared to be submitted to a background information center.
11. The automatic emergency risk avoiding system for the self-service transaction according to claim 4, wherein the emergency signal generation module further comprises:
an emergency termination service signal temporary storage unit for temporarily storing the emergency termination service signal issued by the identification processing unit or the comparison unit.
12. The automatic emergency risk avoiding system for self-service transaction according to claim 11, wherein the self-service terminal control module comprises:
a detection unit for detecting the emergency termination service signal in the emergency termination service signal temporary storage unit based on a set safety query point; and
a control unit for controlling the self-service terminal to terminate the current transaction in the case that the detection unit detects that the emergency termination service signal is present.
13. The automatic emergency risk avoiding system for self-service transaction according to claim 12, wherein in the case that the detection unit detects the emergency termination service signal, the detection unit enters into a wait state, instructs the control unit to control the self-service terminal to halt the current transaction, detects the emergency termination service signal in the emergency termination service signal temporary storage unit periodically within a time limit of the wait state, and notifies the control unit to control the self-service terminal to continue the current transaction only in the case that the detection unit detects that the emergency termination service signal is rescinded, or, the control unit controls the self-service terminal to terminate the current transaction in the case that the time limit expires.
14. The automatic emergency risk avoiding system for self-service transaction according to claim 7, wherein the safety query point is a service point in the case that the self-service terminal has finished processing of an atomic service.
15. The automatic emergency risk avoiding system for self-service transaction according to claim 12, wherein the safety query point is a service point in the case that the self-service terminal has finished processing of an atomic service.
16. The automatic emergency risk avoiding system for self-service transaction according to claim 13, wherein the safety query point is a service point in the case that the self-service terminal has finished processing of an atomic service.
17. The automatic emergency risk avoiding system for self-service transaction according to claim 15, wherein the safety query point comprises a point after collecting of information of money withdrawal business has been finished and before an 8583 message packaged with the information of the money withdrawal business is prepared to be submitted to a background information center, and a point after a business program proceeds to a step that cashes have already been deployed and come out from a cashbox and before the cashes is prepared to be sent to a cash outlet.
18. The automatic emergency risk avoiding system for self-service transaction according to claim 14, wherein the safety query point comprises a point after collecting of transfer information of a transfer business has been finished and before an 8583 message packaged with the transfer information is prepared to be submitted to a background information center.
19. The automatic emergency risk avoiding system for self-service transaction according to claim 15, wherein the safety query point comprises a point after collecting of information of money withdrawal business has been finished and before an 8583 message packaged with the information of the money withdrawal business is prepared to be submitted to a background information center, and a point after a business program proceeds to a step that cashes have already been deployed and come out from a cashbox and before the cashes is prepared to be sent to a cash outlet.
20. The automatic emergency risk avoiding system for self-service transaction according to claim 15, wherein the safety query point comprises a point after collecting of transfer information of a transfer business has been finished and before an 8583 message packaged with the transfer information is prepared to be submitted to a background information center.