Ferroelectric display panel and driving method therefor to achieve gray scale
First Claim
Patent Images
1. A display panel, comprising:
- a liquid crystal device comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric crystal under bistability condition showing either a first or a second orientation state,means for orienting the ferroelectric liquid crystal to either one of the first and second orientation states at respective picture elements, andduration-controlling means for controlling the duration of the first or second orientation state at respective picture elements.
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Accused Products
Abstract
A display panel comprising a liquid crystal device comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric crystal under bistability condition showing either a first or a second orientation state; means for orienting the ferroelectric liquid crystal to either one of the first and second orientation states at respective picture elements; and means for controlling the duration of the first or second orientation state at respective picture elements.
270 Citations
68 Claims
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1. A display panel, comprising:
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a liquid crystal device comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric crystal under bistability condition showing either a first or a second orientation state, means for orienting the ferroelectric liquid crystal to either one of the first and second orientation states at respective picture elements, and duration-controlling means for controlling the duration of the first or second orientation state at respective picture elements. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A display panel, comprising:
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a liquid crystal device comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric crystal under bistability condition showing either a first or a second orientation state, signal-application means for applying signals comprising a first signal for orienting the ferroelectric liquid crystal to the first orientation state and a second signal for orienting the ferroelectric liquid crystal to the second orientation state at respective picture elements on a row, and duration-controlling means for controlling the duration of the first or second orientation state at respective picture elements. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A display panel, comprising:
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a liquid crystal device comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric crystal under bistability condition showing either a first or a second orientation state, signal-application means for applying a first signal for orienting the ferroelectric liquid crystal to the first orientation state picture elements constituting the whole or a part of a picture thereby to clear the picture elements, and a second signal for orienting the ferroelectric liquid crystal to the second orientation state a selected picture element among the cleared picture elements to write a display state based on the second orientation state, said second signal being applied row by row, and duration-controlling means for controlling the duration of the first or second orientation state at respective picture elements. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A display panel, comprising:
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a liquid crystal device comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric crystal under bistability condition having a first orientation state and a second orientation state, writing means for writing a display state based on the first orientation state of the ferroelectric liquid crystal in a selected first group of picture elements row by row on the whole or a part of a picture in a first stage, and writing a display state based on the second orientation state of the ferroelectric liquid crystal in a selected second group of picture elements row by row on the whole or a part of a picture in a second stage, and duration-controlling means for controlling the duration of the first or second orientation state at respective picture elements. - View Dependent Claims (28, 29, 30, 31)
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32. In a method for driving a display panel of the type comprising a plurality of picture elements arranged two-dimensionally;
- the improved method comprising controlling display duty in a unit time period for each picture element thereby to provide a gradation.
- View Dependent Claims (33, 34, 35, 36)
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37. In a method for driving a display panel of the type comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric liquid crystal under bistability condition showing either a first or a second orientation state, either one of the first and second orientation states being written in respective picture elements to effect a display;
- the improved method comprising controlling the duration of the first or second orientation state at respective picture elements.
- View Dependent Claims (38, 39, 40, 41)
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42. In a method for driving a display panel of the type comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric liquid crystal under bistability condition showing either a first or a second orientation state, either one of the first and second orientation states being written in respective picture elements to effect a display;
- the improvement comprising;
applying row by row a first signal for orienting the ferroelectric liquid crystal to the first orientation state at a selected picture element on a row and a second signal for orienting the ferroelectric liquid crystal to the second orientation state at the remaining picture elements on the row, and controlling the duration of the first or second orientation state at respective picture elements. - View Dependent Claims (43, 44, 45, 46, 47, 48)
- the improvement comprising;
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49. In a method for driving a display panel of the type comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric liquid crystal under bistability condition showing either a first or a second orientation state, either one of the first and second orientation states being written in respective picture elements to effect a display;
- the improvement comprising;
applying row by row a first signal for orienting the ferroelectric liquid crystal to the first orientation state at the whole or a part of the picture elements on a row to clear the picture elements and a second signal for orienting the ferroelectric liquid crystal to the second orientation state at a selected picture element among the cleared picture elements on the row, and controlling the duration of the first or second orientation state at respective picture elements. - View Dependent Claims (50, 51, 52, 53)
- the improvement comprising;
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54. In a method for driving a display panel of the type comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric liquid crystal under bistability condition showing either a first or a second orientation state, either one of the first and second orientation states being written in respective picture elements to effect a display;
- the improvement comprising;
applying row by row a first signal for orienting the ferroelectric liquid crystal to the first orientation state at the whole or a part of the picture elements on a row ((N+1)th row) subsequent to a writing row (Nth row) to clear the picture elements and a second signal for orienting the ferroelectric liquid crystal to the second orientation state at a selected picture element among the cleared elements on the writing row (Nth row), and controlling the duration of the first or second orientation state at respective picture elements. - View Dependent Claims (55, 56, 57, 58)
- the improvement comprising;
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59. In a method for driving a display panel of the type comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric liquid crystal under bistability condition showing either a first or a second orientation state, either one of the first and second orientation states being written in respective picture elements to effect a display;
- the improvement comprising;
applying a first signal for orienting the ferroelectric liquid crystal to the first orientation state to picture elements constituting the whole or a part of a picture thereby to clear the picture elements, and a second signal for orienting the ferroelectric liquid crystal to the second orientation state to a selected picture element among the cleared picture elements, and controlling the duration of the first or second orientation state at respective picture elements. - View Dependent Claims (60, 61, 62, 63)
- the improvement comprising;
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64. In a xethod for driving a display panel of the type comprising a plurality of picture elements arranged in a plurality of rows and columns, each picture element comprising a ferroelectric liquid crystal under bistability condition showing either a first or a second orientation state, either one of the first and second orientation states being written in respective picture elements to effect a display;
- the improvement comprising;
applying a first signal for orienting the ferroelectric liquid crystal to the first orientation state to a selected first group of picture elements row by row on the whole or a part of a picture in a first stage, applying a second signal for orienting the ferroelectric liquid crystal to the second orientation state to a selected second group of picture elements row by row on the whole or a part of a picture in a second stage, and controlling the duration of the first or second orientation state at respective picture elements. - View Dependent Claims (65, 66, 67, 68)
- the improvement comprising;
Specification