Display control apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHiroshi Nonoshita, Kenzo Ina, Yoshitsugu Yamanashi, Eiichi Matsuzaki
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Abstract
A preserving performance of a display state of a display having a ferroelectric liquid crystal (FLC) as a display device is effectively used, thereby realizing a long life of the display. For this purpose, access monitor device is provided. The access of a video memory by display data supply device is monitored. When there is no access for a predetermined time or more, that is, when there is no change in the present display content, display drive control device controls display driving device so as to stop the driving of an FLC panel.
Claims14
A display control apparatus comprising:
- display means for displaying data based on display data stored in memory means, said display means having a first group of electrodes and a second group of electrodes arranged therein;
- driving means for driving said first and second groups of electrodes;
- monitor means for monitoring whether the display data has been supplied to the memory means;
- and
- control means for supplying a control signal to said driving means for controlling said driving means such that no potential difference is established between said first group of electrodes and said second group of electrodes if said monitor means detects that the display data has not been supplied to the memory means for a predetermined time or more for causing said display means to maintain displaying of data displayed before no potential difference is established between said first group of electrodes and said second group of electrodes.
A display system comprising:
- storage means for storing display data;
- display means comprising first and second electrodes, for displaying data based on the display data stored in said storage means;
- supplying means for supplying the stored display data to said display means;
- monitor means for monitoring whether the display data has been supplied to said storage means;
- and
- driving means for supplying a drive signal to said display means for driving said display means such that no potential difference is established between said first and second electrodes if said monitor means detects that the display data has not been supplied to the memory means for a predetermined time for causing said display means to maintain displaying of data displayed before no potential difference is established between said first group of electrodes and said second group of electrodes.
A display control method of displaying data by driving display means having first and second electrodes on the basis of display data supplied from a memory, said method comprising the steps of:
- monitoring whether the display data has been supplied to the memory;
- counting a time duration in which the display data is not supplied to the memory;
- and
- driving the display means, by application of a drive signal, such that no potential difference is established between the first and second electrodes when the counted time duration has reached a predetermined value for causing the display means to maintain displaying of data displayed before no potential difference is established between the first and second electrodes.
Dependencies are inferred from the claim text.