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AssigneeMinolta Co., Ltd.
InventorsMasaaki Nakai, Katsuhiko Asai, Koichi Kohriyama, Keizou Ochi, Takashi Kondo, Hideo Hotomi, Kazuaki Okumura
Estimating the term…
A display device which has a liquid crystal display which has a plurality liquid crystal pixels arranged in a matrix and which writes an image thereon after resetting the liquid crystal. The method of writing on the liquid crystal display can be selected from driving methods according to interlace scanning in which a frame is divided into a plurality of fields and writing by interlace scanning is performed and driving methods according to sequential scanning in which scanning lines are subjected to writing serially. When high-speed writing is required, for example, when display of a motion picture, display of inputted letters or scroll display is desired, one of the driving methods according to interlace scanning is selected. In interlace scanning, based on the end of a blackout state of a scanning line in a field, selection of a scanning line in the next field for writing is started. Writing on a scanning line comprises a reset step of resetting the liquid crystal, a selection step of selecting the final state of the liquid crystal, an evolution step of stabling the liquid crystal into the selected state, and one of the length of the reset step and the total length of the selection step and the evolution step is n times (n: natural number) the other. For example, when the length of the reset step is n times the total length of the selection step and the evolution step and when a frame is divided into m fields (m: natural number larger than n) for interlace scanning, there is a moment when, in serial m scanning lines, n scanning lines of them are in the reset step, one of them is in the selection step or in the evolution step, and the other m-n-1 scanning lines are in a display step.
A display device comprising:
A display device comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Using a passive matrix: using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
Composition of display devices: display panel composed of stacked panels
Use of memory effects in nematic liquid crystals: cholesteric liquid crystals, including chiral-nematic liquid crystals, with transitions between…
Details of interlacing: related to multiple interlacing, i.e. involving more fields than just one odd field and one even field
Term ended 6 Apr 2024 (estimated)
1. Field of the Invention
The present invention relates to a liquid crystal display device, and more particularly to a display device which has a liquid crystal display which has a plurality of liquid crystal pixels arranged in a matrix and on which writing is carried out after reset of the liquid crystal.
2. Description of Prior Art
These and other objects and features of the present invention will be apparent from the following description with reference to the accompanying drawings, in which:
FIG. 1 is an exemplary liquid crystal display which is employed in a display device according to the present invention;
FIG. 2 is a block diagram which shows a driving circuit of the liquid crystal display;
Embodiments of a display device according to the present invention are described with reference to the accompanying drawings.
First, a liquid crystal display which is suited to be employed in a display device according to the present invention is described. The liquid crystal display comprises liquid crystal which exhibits a cholesteric phase.
FIG. 1 shows a reflective type full-color liquid crystal display which is driven by a simple matrix driving method. In this liquid crystal display 100, on a light absorbing layer 121, a red display layer 111R, a green display layer 111G and a blue display layer 111B are laminated. The red display layer 111R makes a display by switching between a red selective reflection state and a transparent state. The green display layer 111G makes a display by switching between a green selective reflection state and a transparent state. The blue display layer 111B makes a display by switching between a blue selective reflection state and a transparent state.