1. A drive control apparatus that controls driving of an electronic device driven by power of a battery, the apparatus comprising:
a battery information management section that manages at least one of a remaining power level of a reserve battery including a charging battery or a replacement battery for the electronic device, and the presence or absence of the reserve battery; and
a battery state determination section that determines whether or not to drive the electronic device in a power saving mode when the remaining power level of the battery loaded in the electronic device decreases to a level equal to or less than a predetermined battery capacity, based on at least one of the remaining power level of the reserve battery and the presence or absence of the reserve battery.
2. The drive control apparatus according to claim 1, wherein:
the battery information management section estimates whether a user of the electronic device holds the reserve battery that has been charged; and
the battery state determination section determines whether or not to drive the electronic device in the power saving mode when the remaining power level of the battery loaded in the electronic device decreases to a level equal to or less than the predetermined battery capacity, based on an estimation result of whether the user holds the reserve battery that has been charged.
3. The drive control apparatus according to claim 1, further comprising a battery state linkage control section that controls the driving of the electronic device according to a determination result of the battery state determination section.
4. The drive control apparatus according to claim 1, wherein:
the battery information management section acquires the remaining power level of the reserve battery that has been charged and determined to be held by the user; and
the battery state determination section determines to shift the driving of the electronic device from a normal mode to the power saving mode under condition that a total value of the remaining power level of the battery and the remaining power level of the reserve battery is equal to or less than a predetermined threshold.
5. The drive control apparatus according to claim 1, wherein the battery information management section acquires information on the remaining power level of the reserve battery directly from the reserve battery or through user input.
6. The drive control apparatus according to claim 5, wherein, when the charging battery that allows for a plurality of times of full charging of the battery loaded in the electronic device is connected, the battery information management section acquires information indicating how many more times of the full charging is allowed by the charging battery, as information on the remaining power level of the reserve battery.
7. The drive control apparatus according to claim 5, wherein the battery information management section determines to output a message that prompts charging of the charging battery under condition that the remaining power level of the charging battery under management becomes equal to or less than a remaining power level necessary for one time of full charging, at least.
8. The drive control apparatus according to claim 1, wherein the charging battery includes a charging battery to be connected via a wired connection scheme such as USB or a non-contact scheme such as Qi.
9. A drive control method of controlling driving of an electronic device driven by power of a battery, the method comprising:
managing at least one of a remaining power level of a reserve battery including a charging battery or a replacement battery for the electronic device, and the presence or absence of the reserve battery; and
determining whether or not to drive the electronic device in a power saving mode when the remaining power level of the battery loaded in the electronic device decreases to a level equal to or less than a predetermined battery capacity, based on at least one of the remaining power level of the reserve battery and the presence or absence of the reserve battery.
10. A drive control program stored on a non-transitory computer readable medium that controls driving of an electronic device driven by power of a battery, the program causing a computer of the electronic device to execute processing comprising:
managing at least one of a remaining power level of a reserve battery including a charging battery or a replacement battery for the electronic device, and the presence or absence of the reserve battery; and
determining whether or not to drive the electronic device in a power saving mode when the remaining power level of the battery loaded in the electronic device decreases to a level equal to or less than a predetermined battery capacity, based on at least one of the remaining power level of the reserve battery and the presence or absence of the reserve battery.
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 current output device of a data driving apparatus for sequentially applying data signals to data lines, the data signals corresponding to analog output currents, the current output device comprising:
a switch for controlling supply of the analog output currents according to a first control signal;
a master current samplehold circuit for sampling or holding the analog output currents according to a second control signal;
a slave current samplehold circuit for holding or sampling the analog output currents according to a third control signal; and
a multiplexer for selecting at least one of the analog output currents held in the master current samplehold circuit or the slave current samplehold circuit according to a fourth control signal and for applying the selected analog output current to a corresponding one of the data lines.
2. The current output device of claim 1, wherein the second and third control signals are mutually exclusively provided to prevent sampling operations of the master and the slave current samplehold circuits from being synchronously performed.
3. The current output device of claim 1, wherein while one of the master and slave current samplehold circuits samples the analog output currents, the other holds a current sampled during a previous row line time.
4. The current output device of claim 1, wherein a current output from the master and slave current samplehold circuits is amplified to an integer multiple thereof and selectively output according to the fourth control signal.
5. The current output device of claim 1, wherein the master current samplehold circuit or the slave current samplehold circuit comprises a 2-bit digitalanalog converter for controlling an output current range to be proportionally reduced in a maximum output current range.
6. The current output device of claim 1, wherein the analog output currents include a main signal and a sub-signal, wherein the main and sub-signals have a predetermined ratio therebetween such that a load condition is maintained constant and a conversion speed of the analog converted output currents is not decreased.
7. The current output device of claim 1, further comprising a current supplier for adding a direct current to the analog output currents and for supplying a sum of the direct current and the analog output currents to the master and slave current samplehold circuits.
8. The current output device of claim 7, further comprising an adder for subtracting an amount of the direct current provided by the current supplier from an output signal of the multiplexer.
9. The current output device of claim 7, wherein the current supplier comprises a 2-bit digitalanalog converter for controlling an output current range to be proportionally reduced within a maximum output current range.
10. A data driving apparatus comprising:
a plurality of current output devices;
a switch for selecting at least one of the current output devices,
wherein the at least one of the current output devices comprises the current output device of claim 1.
11. A data driving apparatus for applying data signals to a plurality of data lines of a display panel, the data driving apparatus comprising:
a multiplexer for sequentially selecting and outputting a plurality of data signals;
a digitalanalog converter (DAC) for sequentially converting the plurality of data signals sequentially transmitted from the multiplexer into analog output currents, the analog output currents being analog data signals; and
a current output unit for applying the data signals converted by the DAC to the data lines,
wherein the current output unit comprises:
a switch for controlling supply of the analog output currents according to a first control signal;
a master current samplehold circuit for sampling or holding the analog output currents according to a second control signal;
a slave current samplehold circuit for holding or sampling the analog output currents according to a third control signal; and
a multiplexer for selecting at least one of the analog output currents held in the master current samplehold circuit or the slave current samplehold circuit according to a fourth control signal and for applying the selected analog output current to a corresponding one of the data lines.
12. The data driving apparatus of claim 11, wherein the second and third control signals are mutually exclusively provided to prevent sampling operations of the master and slave current samplehold circuits from being synchronously performed.
13. The data driving apparatus of claim 11, wherein while one of the master and slave current samplehold circuits samples the analog output currents, the other holds a current sampled during a previous row line time.
14. The data driving apparatus of claim 11, wherein a current output from the master and the slave current samplehold circuits is amplified to an integer multiple thereof and selectively output according to the fourth control signal.
15. The data driving apparatus of claim 11, wherein the master or slave current samplehold circuit comprises a 2-bit digitalanalog converter for controlling an output current range to be reduced in proportion to a maximum output current range.
16. A light emitting display device comprising:
a display unit having a plurality of scan lines for transmitting selection signals, a plurality of data lines for transmitting data signals, and a plurality of pixels coupled to the plurality of data lines and the plurality of scan lines;
a data driver for generating the data signals and for applying the data signals to the data lines; and
a scan driver for generating the selection signals and for applying the generated selection signals to the scan lines,
wherein the data driver comprises:
a multiplexer for sequentially selecting a plurality of data signals and outputting the sequentially selected data signals;
a digitalanalog converter (DAC) for sequentially converting the plurality of data signals sequentially transmitted from the multiplexer into analog data signals; and
a current output unit for controlling the data signals converted by the DAC to be applied to the data lines,
wherein the current output unit comprises:
a switch for controlling supply of the analog output currents according to a first control signal;
a master current samplehold circuit for sampling or holding the analog output currents according to a second control signal;
a slave current samplehold circuit for holding or sampling the analog output currents according to a third control signal; and
a multiplexer for selecting at least one of the analog output currents held in the master current samplehold circuit or the slave current samplehold circuit according to a fourth control signal and for applying the selected analog output current to a corresponding one of the data lines.
17. The light emitting display device of claim 16, wherein the second and third control signals are mutually exclusively provided to prevent sampling operations of the master and the slave current samplehold circuits from being synchronously performed.
18. The light emitting display device of claim 16, wherein while one of the master and the slave current samplehold circuits samples the analog output currents, the other holds a current sampled during a previous row line time.
19. A light emitting display panel comprising:
a plurality of scan lines for transmitting selection signals;
a plurality of data lines for transmitting analog data signals;
a plurality of pixels coupled to the scan lines and the data lines;
a scan driver for generating the selection signals and for applying the generated selection signals to the scan lines; and
a data driver for sequentially converting a sequentially transmitted plurality of data signals into the analog data signals, and for controlling a current output unit to sequentially apply the analog data signals to the data lines, the analog data signals corresponding to analog output currents,
wherein the current output unit of the data driver comprises:
a switch for controlling supply of the analog output currents according to a first control signal;
a master current samplehold circuit for sampling or holding the analog output currents according to a second control signal;
a slave current samplehold circuit for sampling or holding the analog output currents according to a third control signal; and
a multiplexer for selecting an output current held in the master current samplehold circuit or the slave current samplehold circuit according to the fourth control signal and for applying the selected output current to the a corresponding one of the data lines.
20. The light emitting display panel of claim 19, wherein while one of the master and the slave current samplehold circuits samples the analog output currents, the other holds a current sampled during a previous row line time.
21. A current output device of a data driver for sequentially applying data signals to data lines, the data signals corresponding to analog output currents, the current output device comprising:
a switch for controlling supply of the analog output currents according to a first control signal;
a current samplehold circuit for sampling or holding the analog output currents according to a current samplehold control signal;
a current supplier for adding a direct current to the analog output currents and for supplying a sum of the direct current and the analog output currents to the current samplehold circuit; and
an adder for receiving a direct current component corresponding to the direct current and for subtracting an amount of current that corresponds to the amount of the direct current provided by the current supplier from a signal output by the current samplehold circuit.
22. The current output device of claim 21, wherein the current supplier comprises a 2-bit digitalanalog converter for controlling an output current range to be reduced in proportion to a maximum output current range.
23. The current output device of claim 21, wherein the direct current is in proportion to an integer times the direct current component provided to the adder.
24. The current output device of claim 21, wherein the current samplehold circuit comprises:
a master current samplehold circuit for sampling or holding at least one of the analog output currents according to a first current samplehold control signal;
a slave current samplehold circuit for sampling or holding the at least one of the analog output currents according to a second current samplehold control signal; and
a multiplexer for selecting at least one of the analog output currents held in the master current samplehold circuit or the slave current samplehold circuit according to a current output control signal and for applying the selected output current to a corresponding one of the data lines.
25. The current output device of claim 24, wherein the first and second current samplehold control signals are mutually exclusively provided to prevent sampling operations of the master and the slave current samplehold circuits from being synchronously performed.
26. The current output device of claim 24, wherein while one of the master and the slave current samplehold circuits samples the analog output currents, the other holds a current sampled during a previous row line time.
27. The current output device of claim 24, wherein a current output from the master and the slave current samplehold circuits is amplified to an integer multiple thereof and selectively output according to the fourth control signal.
28. The current output device of claim 24, wherein the master or slave current samplehold circuit comprises a 2-bit digitalanalog converter for controlling an output current range to be reduced in proportion to a maximum output current range.
29. The current output device of claim 21, wherein the analog output currents include a main signal and a sub-signal, wherein the main and sub-signals have a given ratio such that load conditions of the main and sub-signals are maintained regularly and a decrease of conversion speed of output currents that are converted to analog data is prevented.
30. A data driving apparatus comprising:
a plurality of current output devices;
a switch for selecting at least one of the current output devices,
wherein the at least one of the current output devices comprises the current output device of claim 21.
31. A data driving apparatus for applying data signals to a plurality of data lines of a display panel, the data driving apparatus comprising:
a multiplexer for sequentially selecting the data signals and for outputting the sequentially selected data signals;
a digitalanalog converter (DAC) for sequentially converting the data signals sequentially transmitted by the multiplexer into analog output currents which are analog data signals; and
a current output unit for controlling the data signals converted by the DAC to be applied to the data lines,
wherein the current output unit comprises:
a switch for controlling supply of the analog output currents according to a first control signal;
a current samplehold circuit for sampling or holding the analog output currents according to a currenthold control signal;
a current supplier for adding a direct current to the analog output currents and for supplying a sum of the direct current and the analog output currents to the current samplehold circuit; and
an adder for receiving a direct current component corresponding to the direct current and for subtracting an amount of current that corresponds to the amount of the direct current provided by the current supplier from a signal output by the current samplehold circuit.
32. The data driving apparatus of claim 31, wherein the current samplehold circuit comprises:
a master current samplehold circuit for sampling or holding the analog output currents according to a first current samplehold control signal;
a slave current samplehold circuit for sampling or holding the analog output currents according to a second current samplehold control signal; and
a multiplexer for selecting at least one of the analog output currents held in the master current samplehold circuit or the slave current samplehold circuit according to a current output control signal and for applying the selected output current to a corresponding one of the data lines.
33. The data driving apparatus of claim 32, wherein the first and second current samplehold control signals are mutually exclusively provided to prevent sampling operations of the master and the slave current samplehold circuits from being synchronously performed.
34. The data driving apparatus of claim 32, wherein while one of the master and the slave current samplehold circuits samples the analog output currents, the other holds a current sampled during a previous row line time.
35. The data driving apparatus of claim 32, wherein a current output from the master and the slave current samplehold circuits is amplified by an integer multiple thereof and selectively output according to the fourth control signal.
36. A light emitting display device comprising:
a display unit having a plurality of scan lines for transmitting selection signals, a plurality of data lines for transmitting data signals, and a plurality of pixels coupled to the plurality of data lines and the plurality of scan lines;
a data driver for generating the data signals and for applying the data signals to the data lines; and
a scan driver for generating the selection signals and for applying the generated selection signals to the scan lines,
wherein the data driver comprises:
a multiplexer for sequentially selecting a plurality of data signals and for outputting the sequentially selected data signals;
a digitalanalog converter (DAC) for sequentially converting a plurality of data signals sequentially transmitted from the multiplexer into analog data signals that are analog output currents; and
a current output unit for controlling the data signals converted by the DAC to be applied to the data lines, and
wherein the current output unit comprises:
a switch for controlling supply of the analog output currents according to a first control signal;
a current samplehold circuit for sampling or holding the analog output currents according to a second control signal;
a current supplier for adding a direct current to the analog output currents and for supplying a sum of the direct current and the analog output currents to the current samplehold circuit; and
an adder for receiving a direct current component corresponding to the direct current and for subtracting an amount of current that corresponds to the amount of direct current provided by the current supplier from a signal output by the current samplehold circuit.
37. The light emitting display device of claim 36, wherein the current samplehold circuit comprises:
a master current samplehold circuit for sampling or holding the analog output currents according to a first current samplehold control signal;
a slave current samplehold circuit for sampling or holding the analog output currents according to a second current samplehold control signal; and
a multiplexer for selecting an output current held in the master current samplehold circuit or the slave current samplehold circuit according to a current output control signal and for applying the selected output current to a corresponding one of the data lines.
38. The light emitting display device of claim 37, wherein the first and second current samplehold control signals are mutually exclusively provided to prevent sampling operations of the master and the slave current samplehold circuits from being synchronously performed.
39. The light emitting display device of claim 37, wherein while one of the master and the slave current samplehold circuits samples the analog output currents, the other holds a current sampled during a previous row line time.
40. A light emitting display panel comprising:
a plurality of scan lines for transmitting selection signals;
a plurality of data lines for transmitting data currents;
a plurality of pixels coupled to the scan lines and the data lines;
a scan driver for generating the selection signals and for applying the generated selection signals to the corresponding scan lines; and
a data driver for sequentially converting a sequentially transmitted plurality of data signals into analog data signals that are analog output currents and for controlling a current output unit to sequentially apply the converted data signals to the data lines,
wherein the current output unit of the data driver comprises:
a switch for controlling supply of the analog output currents according to a first control signal;
a current samplehold circuit for sampling or holding the analog output currents according to a currenthold control signal;
a current supplier for adding a direct current to the analog output currents and for supplying a sum of the direct current and the analog output currents to the current samplehold circuit; and
an adder for receiving a direct current component corresponding to the direct current and for subtracting an amount of current that corresponds to the amount of the direct current provided by the current supplier from a signal output by the current samplehold circuit.