Display device and display control method thereof

Abstract

This invention provides a display device with a self-powered display for playing a display image and generating electrical signals. A control circuit stores table data including numerical ranges and system static time, with the numerical ranges corresponding to the system static time. A battery is electrically connected to the control circuit, which charges the battery through the power generation of the self-powered display. When the self-powered display generates power, the control circuit detects the electrical signal from the self-powered display and generates an electrical signal value. It then compares the electrical signal value with the table data to obtain one of the numerical ranges corresponding to the electrical signal value and one of the system static time corresponding to that range. The self-powered display then plays a display image based on the system static time. This effectively saves energy and reduces the frequency of manual battery charging.

Claims

1. A display device comprising: a self-powered display for displaying a screen and generating an electrical signal; a control circuit electrically connected to the self-powered display and for detecting the electrical signal and generating an electrical signal value, the control circuit storing table data including a plurality of numerical ranges and a plurality of system quiescent times, the numerical ranges corresponding to the respective system quiescent times; and a battery electrically connected to the control circuit, the control circuit being used to charge the battery through the power generated by the self-powered display; wherein... When the self-powered display generates electricity, the control circuit detects the electrical signal of the self-powered display and generates the electrical signal value. It then compares the electrical signal value with the table data to obtain one of the numerical ranges corresponding to the electrical signal value and one of the system static times corresponding to the numerical ranges. This allows the self-powered display to play the display screen based on the system static times.

2. The display device as claimed in claim 1, wherein the electrical signal is a voltage signal or a current signal, the self-powered display is powered by the battery to play the display image, and the numerical ranges include a first numerical range and a second numerical range, wherein the value of the first numerical range is greater than the value of the second numerical range.

3. The display device as described in claim 2, wherein each system static time represents a time interval during which the self-powered display remains static, the system static times including a first system static time and a second system static time, the first system static time and the second system static time respectively corresponding to a first numerical interval and the second numerical interval, the first system static time being less than the second system static time; when the electrical signal value corresponds to the first numerical interval, the control circuit refreshes the display screen played by the self-powered display, and the self-powered display maintains the refreshed display screen according to the first system static time; and when the electrical signal value corresponds to the second numerical interval, the control circuit refreshes the display screen played by the self-powered display, and the self-powered display maintains the refreshed display screen according to the second system static time.

4. The display device as claimed in claim 1, wherein the self-powered display comprises: a cholesteric liquid crystal display; and a solar module connected to the cholesteric liquid crystal display and the control circuit, the solar module converting light energy into electrical energy and storing the electrical energy in the battery through the control circuit.

5. The display device as described in claim 1, wherein, The control circuit includes a system on a chip (SOC) that contains or is connected to a maximum power point tracking (MPPT) unit to charge the battery through solar power generated by the self-powered display; and when the self-powered display does not generate power, the self-powered display continues to display the display screen.

6. The display device as claimed in claim 1 further comprises: a timing controller (TCON) electrically connected between the control circuit and the self-powered display, wherein the self-powered display plays the display screen according to the system static time via the timing controller.

7. A display device comprising: a self-powered display for playing a display image and generating electricity; a control circuit electrically connected to the self-powered display, the control circuit storing table data including multiple numerical ranges and multiple system quiescent times, the numerical ranges corresponding to the system quiescent times respectively, the control circuit including a maximum power point tracking (MPPT) unit; and a battery electrically connected to the control circuit, the control circuit being used to charge the battery through the electricity generated by the self-powered display; wherein... When the self-powered display generates electricity, the control circuit detects the output signal of one of the maximum power point tracking units and generates an electrical signal value. It then compares the electrical signal value with the table data to obtain one of the numerical ranges corresponding to the electrical signal value and one of the system static times corresponding to the numerical ranges. This allows the self-powered display to play the display screen based on the system static times.

8. The display device as claimed in claim 7, wherein the output electrical signal is a voltage signal or a current signal, the output electrical signal represents an electrical signal at one of the output terminals of the maximum power tracking unit, the self-powered display is powered by the battery to play the display screen, and the numerical ranges include a first numerical range and a second numerical range, wherein the value of the first numerical range is greater than the value of the second numerical range.

9. The display device as claimed in claim 8, wherein each system static time represents a time interval during which the self-powered display remains static, the system static times including a first system static time and a second system static time, the first system static time and the second system static time respectively corresponding to a first numerical interval and the second numerical interval, the first system static time being less than the second system static time; when the electrical signal value corresponds to the first numerical interval, the control circuit refreshes the display screen played by the self-powered display, and the self-powered display maintains the refreshed display screen according to the first system static time; and when the electrical signal value corresponds to the second numerical interval, the control circuit refreshes the display screen played by the self-powered display, and the self-powered display maintains the refreshed display screen according to the second system static time.

10. The display device as claimed in claim 7, wherein the self-powered display comprises: a cholesteric liquid crystal display; and a solar module connected to the cholesteric liquid crystal display and the control circuit, the solar module converting light energy into electrical energy to generate an electrical signal and storing the electrical energy in the battery through the control circuit.

11. The display device as described in claim 7, wherein, The control circuit further includes a system on a chip (SOC), which contains or is connected to the maximum power point tracking unit to charge the battery through solar power generation from the self-powered display; and when the self-powered display does not generate power, the self-powered display continues to display the display screen.

12. The display device as claimed in claim 7 further comprises: a timing controller (TCON) electrically connected between the control circuit and the self-powered display, wherein the self-powered display plays the display screen according to the system static time via the timing controller.

13. A playback control method for a display device, comprising: playing a display image and generating an electrical signal by means of a self-powered display; and generating an electrical signal value by means of a control circuit detecting one of the electrical signal and an output electrical signal of a Maximum Power Point Tracking (MPPT) unit, and charging a battery by means of the power generation of the self-powered display, wherein the control circuit includes the maximum power point tracking unit; wherein, When the self-powered display generates electricity, the control circuit detects the electrical signal of the self-powered display and the output electrical signal of the maximum power point tracking unit to generate the electrical signal value. It then compares the electrical signal value with a table of data to obtain one of a plurality of numerical ranges corresponding to the electrical signal value and one of a plurality of system static times corresponding to the numerical ranges. This allows the self-powered display to play the display image based on the system static times. The display device includes the self-powered display, the control circuit, and the battery. The control circuit is electrically connected to the self-powered display and the battery. The control circuit stores the table of data, which includes the numerical ranges and system static times, with each numerical range corresponding to a system static time.

14. The playback control method of the display device as described in claim 13, wherein the control circuit controls a refresh rate of the display screen played by the self-powered display based on the magnitude of the electrical signal value.

15. The playback control method of the display device as described in claim 14, wherein the magnitude of the electrical signal value is positively correlated with the refresh rate.

16. The playback control method of the display device as described in claim 13, wherein either the electrical signal of the self-powered display or the output electrical signal of the maximum power tracking unit is a voltage signal or a current signal, the output electrical signal represents the electrical signal of one output terminal of the maximum power tracking unit, the self-powered display is powered by the battery to play the display screen, and the numerical ranges include a first numerical range and a second numerical range, wherein the value of the first numerical range is greater than the value of the second numerical range.

17. The playback control method of the display device as described in claim 16, wherein each system static time represents a time interval during which the self-powered display remains static, the system static times including a first system static time and a second system static time, the first system static time and the second system static time respectively corresponding to a first numerical interval and the second numerical interval, the first system static time being less than the second system static time; when the electrical signal value corresponds to the first numerical interval, the control circuit refreshes the display screen played by the self-powered display, and the self-powered display maintains the refreshed display screen according to the first system static time; and when the electrical signal value corresponds to the second numerical interval, the control circuit refreshes the display screen played by the self-powered display, and the self-powered display maintains the refreshed display screen according to the second system static time.

18. The playback control method of the display device as described in claim 13, wherein the self-powered display comprises: a cholesteric liquid crystal display; and a solar module connected to the cholesteric liquid crystal display and the control circuit, wherein the solar module converts light energy into electrical energy to generate the electrical signal, and stores the electrical energy in the battery through the control circuit.

19. The playback control method for the display device as described in claim 13, wherein, The control circuit further includes a system on a chip (SOC), which contains or is connected to the maximum power point tracking unit to charge the battery through solar power generation from the self-powered display; and when the self-powered display does not generate power, the self-powered display continues to display the display screen.

20. The playback control method of the display device as described in claim 13, wherein the display device further comprises: a timing controller (TCON) electrically connected between the control circuit and the self-powered display, wherein the self-powered display plays the display screen according to the system static time via the timing controller.

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