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US 7,126,569 B2Granted
Liquid crystal display device
AssigneeMinolta Co., Ltd.
InventorsHiroshi Ootsuka, Kiyofumi Hashimoto, Shuichiro Kaneko, Katsuhiko Asai
Life of this patent
Estimating the term…
Abstract
A liquid crystal display device which has a liquid crystal display which uses liquid crystal with a memory effect. When a contact action with a screen of the liquid crystal display is made, information displayed thereon is written again thereon. Also, if no changes have been made on the information displayed for a whole day, the same information is automatically written on the liquid crystal display. The display device is attachable to and detachable from a household electrical appliance. The information is about at least one of a calendar, a recipe, a massage, stock, a picture and data reception from outside, etc.
Claims20
A liquid crystal display device, comprising
- a display section comprising a plurality of stacked layers, each of said layers comprising a first substrate which is a flexible substrate through which a viewer may view currently displayed information, a second substrate, and a liquid crystal material having a memory effect disposed between the first substrate and the second substrate, the plurality of layers being stacked such that the first substrate in a layer is positioned closer to a viewer side than the second substrate of the layer, the display section being capable of continuing to display information thereon for about one day without applying a voltage thereto and without refreshing the information displayed thereon;
- a driving section which drives the display section;
- a control section which controls the driving section to write currently displayed information on the display section again at a specified time;
- and
- a timer for detecting time elapsing, the time beginning counting when information displayed on the display section is updated;
- wherein the control section causes the driving section to rewrite currently displayed information on the display section upon the timer counting to a predetermined value corresponding to a predetermined period of time.
3 more elements
A liquid crystal display device comprising:
- a display section comprising chiral nematic liquid crystal which exhibits a cholesteric phase and which has a memory effect sufficient to keep information displayed for at least a day without application of a voltage thereto and without a refresh drive;
- a driving section which drives the display section;
- an electric power source;
- a booster circuit which raises a voltage supplied from the power source and applies the raised voltage to the driving section;
- a control section which controls the driving section to write currently displayed information on the display section again at a specified time;
- and
- a timer for detecting time elapsing, the timer beginning counting when information displayed on the display section is updated;
- wherein:
- the control section causes the driving section to rewrite currently displayed information on the display section upon the timer counting to a predetermined value corresponding to a predetermined period of time;
- the control section stops supply of electric power to the driving section by inactivating the booster circuit;
- and
- the display section is reset by applying a pulse voltage to untwist the chiral nematic liquid crystal to each pixel.
9 more elements
A display device comprising:
- a display section which has a memory effect sufficient to keep information displayed for at least a day without application of a voltage thereto and without a refresh drive;
- a driving section which drives the display section;
- an electric power source;
- a booster circuit which raises a voltage supplied from the power source and applies the raised voltage to the driving section;
- a control section which controls the driving section to write an image on the display section based on an image information;
- and
- a timer for detecting time elapsing, the timer beginning counting when writing of an image on the display section is completed;
- wherein:
- the control section causes the driving section to rewrite currently displayed information on the display section upon the timer counting to a predetermined value corresponding to a predetermined period of time;
- the control section stops supply of electric power to the driving section by inactivating the booster circuit after writing of an image on the display section;
- and
- the display section is reset by applying a pulse voltage to each pixel before rewriting of currently displayed information on the display section.
9 more elements
Dependencies are inferred from the claim text.