Control device, electrooptics device, electronic apparatus, and control method
View Patent ↗An acquisition device acquires temperature information indicative of temperature. When rewriting of the gray level of a target pixel to be processed among plural pixels starts, in case the temperature indicated by the temperature information acquired by the acquisition device is less than a threshold value, a remainder frequency setting device writes a value b (b<a) as a counter value (a remainder frequency) stored in a remainder frequency memory, for the target pixel, through a memory control device. After passing the predetermined period, when a condition to select b-number of the predetermined periods from among a-number of the predetermined periods is met, a remainder frequency update device decrements the counter value stored in the remainder frequency memory through the memory control device.
1. A control device comprising:
a memory control device that controls access, for each of plural pixels corresponding to plural electro-optic elements whose optical state changes from a first state to a second state by voltage application a times each in a predetermined period as the unit, to a first memory that stores a present gray level value, a second memory that stores a gray level value to be displayed next, and a third memory that stores a counter value according to a remainder frequency of voltage applications;
an acquisition device that acquires temperature information indicative of temperature;
a remainder frequency setting device that, when rewriting of the gray level of a target pixel to be processed among the plural pixels starts in case when the temperature indicated by the temperature information acquired by the acquisition device is less than a threshold value, writes a value b (b<a) as the counter value stored in the third memory, for the target pixel, through the memory control device;
a drive control device that, when the remainder frequency indicated by the counter value stored in the third memory is not zero for the target pixel, controls to apply a voltage to the target pixel; and
a remainder frequency update device that, after passing the predetermined period, when a condition to select b-number of the predetermined periods from among a-number of the predetermined periods is met, decrements the counter value stored in the third memory through the memory control device.
2. The control device according to claim 1 , further comprising a memory device that stores a table including plural sets of temperature and voltage application frequency, the a-number being the maximum value of the voltage application frequency contained in the table.
3. The control device according to claim 1 , further comprising a decision device that decides the condition according to the temperature acquired by the acquisition device.
4. An electro-optic device comprising the control device recited in claim 1 and the plural electro-optic elements.
5. An electronic apparatus comprising the electro-optic device recited in claim 4 .
6. A control method for controlling an electro-optic device, the electro-optic device including a plurality of electro-optic elements whose optical state changes from a first state to a second state by voltage application a times each in a predetermined period as the unit, a control device, and a memory control device that controls access, for each of plural pixels corresponding to the plural electro-optic elements, to a first memory that stores a present gray level value, a second memory that stores a gray level value to be displayed next, and a third memory that stores a counter value according to a remainder frequency of voltage applications, the control method comprising:
acquiring temperature information indicative of temperature;
when rewriting of the gray level of a target pixel to be processed among the plural pixels starts in case when the temperature indicated by the temperature information acquired by the acquisition device is less than a threshold value, writing a value b (b<a) as the counter value stored in the third memory, for the target pixel;
when the remainder frequency indicated by the counter value stored in the third memory is not zero for the target pixel, controlling to apply a voltage to the target pixel; and,
after passing the predetermined period, when a condition to select b-number of the predetermined periods from among a-number of the predetermined periods is met, decrementing the counter value stored in the third memory through the memory control device.
7. A control device comprising:
a memory control device that controls access, for each of plural pixels corresponding to plural electro-optic elements whose optical state changes from a first state to a second state by voltage application a times each in a predetermined period as the unit, to a first memory that stores a present gray level value, a second memory that stores a gray level value to be displayed next, and a third memory that stores a counter value according to a remainder frequency of voltage applications;
an acquisition device that acquires temperature information indicative of temperature;
a remainder frequency setting device that, when rewriting of the gray level of a target pixel to be processed among the plural pixels starts, writes a value b (b<a) as the counter value stored in the third memory, for the target pixel, through the memory control device;
a drive control device that, when the remainder frequency indicated by the counter value stored in the third memory is not zero for the target pixel, controls to apply a voltage to the target pixel; and
a remainder frequency update device that, after passing the predetermined period, when a condition to select b-number of the predetermined periods from among a-number of the predetermined periods is met, decrements the counter value stored in the third memory through the memory control device.
8. A control method for controlling an electro-optic device, the electro-optic device including a plurality of electro-optic elements whose optical state changes from a first state to a second state by voltage application a times each in a predetermined period as the unit, a control device, and a memory control device that controls access, for each of plural pixels corresponding to the plural electro-optic elements, to a first memory that stores a present gray level value, a second memory that stores a gray level value to be displayed next, and a third memory that stores a counter value according to a remainder frequency of voltage applications, the control method comprising:
acquiring temperature information indicative of temperature;
when rewriting of the gray level of a target pixel to be processed among the plural pixels starts, writing a value b (b<a) as the counter value stored in the third memory, for the target pixel;
when the remainder frequency indicated by the counter value stored in the third memory is not zero for the target pixel, controlling to apply a voltage to the target pixel; and,
after passing the predetermined period, when a condition to select b-number of the predetermined periods from among a-number of the predetermined periods is met, decrementing the counter value stored in the third memory through the memory control device.