Method and driving apparatus for outputting driving signal to drive electro-phoretic display
The present invention provides a driving apparatus, the driving apparatus is used for outputting a driving signal to drive an electro-phoretic display, and the driving apparatus includes a driving signal generator, a temperature sensor, and a selector. The driving signal generator generates a plurality of periodic alternative current signals and a plurality of direct current signals. The temperature sensor generates a temperature parameter by sensing an environment temperature. The selector is coupled to the driving signal generator and the temperature sensor. The selector selects one of the periodic alternative current signals or one of the direct current signals as the driving signal according to the temperature parameter.
1. A driving apparatus for outputting a driving signal to drive an electro-phoretic display, comprising:
a driving signal generator, for generating a plurality of periodic alternative current signals and a plurality of direct current signals;
a temperature sensor, generating a temperature parameter by sensing an environment temperature; and
a selector, coupled to the driving signal generator and the temperature sensor, the selector selecting one of the periodic alternative current signals or one of the direct current signals as the driving signal according to the temperature parameter,
wherein the driving signal is a common voltage for the electro-phoretic display, and the driving signal is dynamically changed among the plurality of periodic alternative current signals and the plurality of direct current signals in response to the temperature parameter when the electro-phoretic display is in operation, so as to improve a driving time related to the electro-phoretic display and thus increasing the performance of the electro-phoretic display.
2. The driving apparatus according to claim 1 , wherein when the temperature parameter is not larger than a preset threshold value, the selector selects one of the periodic alternative current signals as the driving signal.
3. The driving apparatus according to claim 2 , wherein frequencies of the periodic alternative current signals are different.
4. The driving apparatus according to claim 2 , wherein, each of the periodic alternative current signals is corresponded to one of a plurality of first temperature intervals by a first relationship, and the selector selects one of the periodic alternative current signals as the driving signal according to the temperature parameter and the first relationship.
5. The driving apparatus according to claim 1 , wherein when the temperature parameter is larger than the preset threshold value, the selector selects one of the direct current signals as the driving signal.
6. The driving apparatus according to claim 5 , wherein voltage levels of the direct current signals are different.
7. The driving apparatus according to claim 5 , wherein each of the direct current signals is corresponded to one of a plurality of second temperature intervals by a second relationship, and the selector selects one of the direct current signals as the driving signal according to the temperature parameter and the second relationship.
8. A method for generating a driving signal to drive an electro-phoretic display, comprising:
generating a plurality of periodic alternative current signals and a plurality of direct current signals;
generating a temperature parameter by sensing an environment temperature; and
selecting one of the periodic alternative current signals or one of the direct current signals as the driving signal according to the temperature parameter,
wherein the driving signal is a common voltage for the electro-phoretic display, and the driving signal is dynamically changed among the plurality of periodic alternative current signals and the plurality of direct current signals in response to the temperature parameter when the electro-phoretic display is in operation, so as to improve a driving time related to the electro-phoretic display and thus increasing the performance of the electro-phoretic display.
9. The method according to claim 8 , wherein the step of selecting one of the periodic alternative current signals or one of the direct current signals as the driving signal according to the temperature parameter comprises:
selecting one of the periodic alternative current signals as the driving signal when the temperature parameter is larger than a preset threshold value.
10. The method according to claim 9 , wherein the frequencies of the periodic alternative current signals are different.
11. The method according to claim 9 , wherein, each of the periodic alternative current signals is corresponded to one of a plurality of first temperature intervals by a first relationship, and the step of selecting one of the periodic alternative current signals as the driving signal comprises:
selecting one of the periodic alternative current signals as the driving signal according to the temperature parameter and the first relationship.
12. The method according to claim 8 , wherein the step of selecting one of the periodic alternative current signals or one of the direct current signals as the driving signal according to the temperature parameter comprises:
selecting one of the direct current signals as the output signal when the temperature parameter is not larger than the preset threshold value.
13. The method according to claim 12 , the voltage levels of the direct current signals are different.
14. The method according to claim 12 , wherein each of the direct current signals is corresponded to one of a plurality of second temperature intervals by a second relationship, and the step of selecting one of the direct current signals as the driving signal comprises:
selecting one of the direct current signals as the driving signal according to the temperature parameter and the second relationship.