Display apparatus
First Claim
1. A display apparatus, comprising:
- a display panel having a display area (h×
w) and cell gap (d) and including electrodes arranged in a matrix form and comprising a number (Nc) of scanning electrodes each having a resistance (Rt) and a capacitance (Ct), and a number of data electrodes;
a circuit for generating a rectangular drive signal waveform supplied to the scanning electrodes and a data signal waveform supplied to the data electrodes, respectively, of the display panel; and
a low-pass filter for recovering a frequency component exceeding a prescribed cut-off frequency (f) from the rectangular drive signal waveform to form a resultant drive signal waveform that is generally rectangular but with moderately sloped rising and falling portions, and applying the resultant drive signal waveform to inlet ends of the scanning electrodes in the display panel, wherein said cut-off frequency (f) is prescribed according to the following formula;
1 Assignment
0 Petitions
Accused Products
Abstract
A display apparatus, such as a liquid crystal display apparatus, is constituted by: a display unit including electrodes arranged in a matrix form, a circuit for generating a signal waveform applied to the electrodes of the display unit, and a low-pass filter for removing a frequency component exceeding a prescribed frequency from the signal waveform to inlet ends of the electrodes in the display unit. As a result, the occurrence of a large transient current liable to flow at pixels close to inlet ends of the display unit can be suppressed. The removal of such a high-frequency component may also be performed by superposing split pulses with a resin and a falling portion of a drive signal waveform and by integrating the superposed drive signal waveform.
23 Citations
6 Claims
-
1. A display apparatus, comprising:
-
a display panel having a display area (h×
w) and cell gap (d) and including electrodes arranged in a matrix form and comprising a number (Nc) of scanning electrodes each having a resistance (Rt) and a capacitance (Ct), and a number of data electrodes;
a circuit for generating a rectangular drive signal waveform supplied to the scanning electrodes and a data signal waveform supplied to the data electrodes, respectively, of the display panel; and
a low-pass filter for recovering a frequency component exceeding a prescribed cut-off frequency (f) from the rectangular drive signal waveform to form a resultant drive signal waveform that is generally rectangular but with moderately sloped rising and falling portions, and applying the resultant drive signal waveform to inlet ends of the scanning electrodes in the display panel, wherein said cut-off frequency (f) is prescribed according to the following formula;
- View Dependent Claims (2, 3, 4, 5)
-
-
6. A liquid crystal display apparatus comprising:
-
a liquid crystal display panel having a display area (h×
w) and a cell gap (a), and including electrodes arranged in a matrix form, and a liquid crystal disposed in the cell gap so as to form pixels in combination with the electrodes, the electrodes arranged in a matrix form comprising a number (Nc) of scanning electrodes each having a resistance (Rt) and a capacitance (Ct), and a number of data electrodes;
signal waveform-generating means for generating a signal waveform supplied to the scanning electrodes and the data electrodes, said signal waveform-generating means including rectangular signal waveform-generating means for generating a rectangular drive signal waveform having a rising portion and a falling portion supplied to the scanning electrodes;
split pulse-generating means for generating split pulses including a frequency component exceeding a prescribed cut-off frequency (f);
superposing means for superposing the split pulses with the rising and falling portions of the signal waveform; and
integration means for integrating the signal waveform having rising and falling portions superposed with the split pulses, so as to provide a resultant drive signal having moderately sloped rising and falling portions by removing a frequency component exceeding the prescribed cut-off frequency (f) from the signal waveform, and to apply the resultant drive signal to inlet ends of the scanning electrodes in the display panel, wherein said cut-off frequency (f) is prescribed according to the following formula;
-
Specification