Display device with compensation for stray capacitance
First Claim
Patent Images
1. A display device comprising:
- a system of pixels arranged in rows and columns, a line selection circuit coupled to the pixels via a system of row electrodes and which, during operation, selects rows of pixels by means of selection voltages applied to the rows of pixels via the row electrodes, and a circuit for presenting, via a system of column electrodes, column or data voltages to the pixels during row selection, characterized in that the line selection circuit selects in sequence consecutive rows of pixels within groups of at least two rows of pixels during operation and charges consecutive groups of pixels in the opposite sense, and wherein the line selection circuit applies a selection voltage to at least one row electrode or selection electrode at the beginning or the end of a group of rows during operation, which selection voltage differs from the other selection voltages applied within said group of rows.
1 Assignment
0 Petitions
Accused Products
Abstract
When an active matrix LCD is driven while using inversion per n rows (n≧2), stripe effects occur. In the case of double line inversion this leads to stripes in the picture. This can be largely obviated by supplying a different selection voltage to at least the last row of the rows in a group of n rows.
-
Citations
16 Claims
-
1. A display device comprising:
- a system of pixels arranged in rows and columns, a line selection circuit coupled to the pixels via a system of row electrodes and which, during operation, selects rows of pixels by means of selection voltages applied to the rows of pixels via the row electrodes, and a circuit for presenting, via a system of column electrodes, column or data voltages to the pixels during row selection, characterized in that the line selection circuit selects in sequence consecutive rows of pixels within groups of at least two rows of pixels during operation and charges consecutive groups of pixels in the opposite sense, and wherein the line selection circuit applies a selection voltage to at least one row electrode or selection electrode at the beginning or the end of a group of rows during operation, which selection voltage differs from the other selection voltages applied within said group of rows.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
11. A display device comprising:
-
an electro-optical display medium disposed between two supporting plates, a system of pixels comprising picture electrodes arranged in rows and columns on at least one of said supporting plates, a system of row and column electrodes for presenting selection and data signals to said pixels for the purpose of picture display, a circuit for presenting data signals to said column electrodes during each row selection period, and a row selection circuit for applying selection voltages to the pixels for selecting rows of pixels consecutively within groups of at least two rows of pixels and wherein said selection voltages are inverted at least after every two rows of pixels, whereby pixels of consecutive groups are charged to voltages of opposite polarity and the rows of pixels in each group are selected consecutively, the selection voltage applied to at least one row electrode of a group of rows being different from other selection voltages applied to row electrodes within said group of rows. - View Dependent Claims (12, 13, 14, 15, 16)
-
Specification