Display unit and drive system thereof and an information display unit
View Patent ↗In a display panel, a dummy pulse of a predetermined voltage signal is superimposed on a data signal and the dummy pulse has an amplitude much larger than the amplitude of the data signal, and thus a signal waveform applied to a light modulation layer such as LC layer is changed to a high frequency wave. The applying position of the dummy pulse is varied according to each color of R, G and B, or varied according to frame or field. By performing a MLS drive with the dummy pulse superimposed on the data signal, the amplitude difference between the selection signal and the data signal can be reduced. Thus, a common driver IC and a segment driver IC can be formed as one semiconductor chip to be placed on one side, constructing a three side free type.
1. A matrix type display unit having multiple scanning electrodes and multiple signal electrodes, comprising:
a driver including a scanning circuit to drive said scanning electrodes and a signal circuit to drive said signal electrodes, said driver being positioned on one side of said display unit,
wherein a predetermined amplitude pulse, having an amplitude significantly greater than a data signal, is superimposed to one of the signal electrodes and one of the scanning electrodes simultaneously with one horizontal scanning period,
wherein the driver significantly reduces an amplitude of a selection signal and an amplitude difference between a selection signal and the data signal,
wherein the predetermined amplitude pulse is applied simultaneously at a predetermined pulse width to each of a plurality of scanning lines and each of a plurality of signal lines at an end of a subframe,
wherein a length of the subframe is (1+x)(N/4) or x+(N/4) pulse widths, wherein x is the predetermined pulse width, 0 <×<1, N is a number of the scanning lines, N>0, and a pulse width is a unit of time standardized to one scan pulse, and
wherein the driver simultaneously applies an amplitude of aV of drive voltage to each of the plurality of scanning lines, and the driver simultaneously applies an amplitude of 2V of drive voltage to each of the plurality of signal lines, wherein a is a bias ratio and V is a reference voltage.
2. The display unit according to claim 1 , wherein the scanning circuit and the signal circuit are formed within a single semiconductor chip.
3. The display unit according to claim 1 , wherein by selecting simultaneously L number of scanning electrodes where L is an integer greater than one, a gradation display is made.
4. A matrix type display unit having multiple scanning electrodes and multiple signal electrodes, comprising:
a predetermined amplitude pulse, having an amplitude significantly greater than a data signal, superimposed to one of the signal electrodes and one of the scanning electrodes simultaneously with one horizontal scanning period; and
a driver configured to significantly reduce an amplitude of a selection signal and an amplitude difference between a selection signal and the data signal,
wherein a width of said pulse is in a range from 0.06 to 0.23 when the horizontal scanning period is specified to be 1,
wherein the predetermined amplitude pulse is applied simultaneously at a predetermined pulse width to each of a plurality of scanning lines and each of a plurality of signal lines at an end of a subframe,
wherein a length of the subframe is (1+x)(N/4) or x+(N/4) pulse widths, wherein x is the predetermined pulse width, 0 <×<1, N is a number of the scanning lines N>0, and a pulse width is a unit of time standardized to one scan pulse, and
wherein the driver simultaneously applies an amplitude of aV of drive voltage to each of the plurality of scanning lines, and the driver simultaneously applies an amplitude of 2V of drive voltage to each of the plurality of signal lines, wherein a is a bias ratio and V is a reference voltage.
5. A matrix type display unit having multiple scanning electrodes and multiple signal electrodes, comprising:
a pulse applier for superimposing a predetermined amplitude pulse, having an amplitude significantly greater than a data signal, on one of the signal electrodes and one of the scanning electrodes simultaneously with one horizontal scanning period;
a pulse controller for changing at least one of a pulse width and a position of said one horizontal scanning period; and
a driver configured to significantly reduce an amplitude of a selection signal and an amplitude difference between a selection signal and the data signal,
wherein the predetermined amplitude pulse is applied simultaneously at a predetermined pulse width to each of a plurality of scanning lines and each of a plurality of signal lines at an end of a subframe,
wherein a length of the subframe is (1+x)(N/4) or x+(N/4) pulse widths, wherein x is the predetermined pulse width, 0>×>1, N is a number of the scanning lines N>0, and a pulse width is a unit of time standardized to one scan pulse, and
wherein the driver simultaneously applies an amplitude of aV of drive voltage to each of the plurality of scanning lines, and the driver simultaneously applies an amplitude of 2V of drive voltage to each of the plurality of signal lines, wherein a is a bias ratio and V is a reference voltage.
6. A driving method for a matrix type display unit having multiple scanning electrodes and multiple signal electrodes, comprising:
superimposing a predetermined amplitude pulse, having an amplitude significantly greater than a data signal, on one of the signal electrodes and one of the scanning electrodes simultaneously with one horizontal scanning period, wherein the pulse is continuously applied during horizontal scanning periods in odd-numbered and even-numbered order, and
significantly reducing an amplitude of a selection signal and an amplitude difference between a selection signal and the data signal,
wherein the predetermined amplitude pulse is applied simultaneously at a predetermined pulse width to each of a plurality of scanning lines and each of a plurality of signal lines at an end of a subframe,
wherein a length of the subframe is (1+x)(N/4) or x+(N/4) pulse widths, wherein x is the predetermined pulse width, 0<×<1, N is a number of the scanning lines N>0, and a pulse width is a unit of time standardized to one scan pulse, and
wherein the driver simultaneously applies an amplitude of aV of drive voltage to each of the plurality of scanning lines, and the driver simultaneously applies an amplitude of 2V of drive voltage to each of the plurality of signal lines, wherein a is a bias ratio and V is a reference voltage.
7. A driving method for a matrix type display unit having multiple scanning electrodes and multiple signal electrodes and having at least, a first pixel which modulates a first wavelength of light and a second pixel which modulates a second wavelength of light, said method comprising:
superimposing a predetermined amplitude pulse, having an amplitude significantly greater than a data signal, on one of the signal electrodes and one of the scanning electrodes simultaneously with one horizontal scanning period, wherein a starting position of a horizontal scanning period of a pulse applied to the first pixel is different from a starting position of a horizontal scanning period of a pulse applied to the second pixel, and
significantly reducing an amplitude of a selection signal and an amplitude difference between a selection signal and the data signal,
wherein the predetermined amplitude pulse is applied simultaneously at a predetermined pulse width to each of a plurality of scanning lines and each of a plurality of signal lines at an end of a subframe,
wherein a length of the subframe is (1+x)(N/4) or x+(N/4) pulse widths, wherein x is the predetermined pulse width, 0<×<1, N is a number of the scanning lines N>0, and a pulse width is a unit of time standardized to one scan pulse, and
wherein the driver simultaneously applies an amplitude of aV of drive voltage to each of the plurality of scanning lines, and the driver simultaneously applies an amplitude of 2V of drive voltage to each of the plurality of signal lines, wherein a is a bias ratio and V is a reference voltage.
8. A driving method for a matrix type display unit having multiple scanning electrodes and multiple signal electrodes, comprising:
superimposing a predetermined amplitude pulse, having an amplitude significantly greater than a data signal, on one of the signal electrodes and one of the scanning electrodes simultaneously with one horizontal scanning period, wherein by changing at least one of a pulse width and a pulse amplitude, a display brightness of the display unit is varied, and
significantly reducing an amplitude of a selection signal and an amplitude difference between a selection signal and the data signal, and
wherein the predetermined amplitude pulse is applied simultaneously at a predetermined pulse width to each of a plurality of scanning lines and each of a plurality of signal lines at an end of a subframe,
wherein a length of the subframe is (1+x)(N/4) or x+(N/4) pulse widths, wherein x is the predetermined pulse width, 0<×<1, N is a number of the scanning lines N>0, and a pulse width is a unit of time standardized to one pulse, and wherein the driver simultaneously applies an amplitude of aV of drive voltage to each of the plurality of scanning lines, and the driver simultaneously applies an amplitude of 2V of drive voltage to each of the plurality of signal lines, wherein a is a bias ratio and V is a reference voltage.
9. An information display unit having the display unit according to claim 1 and an audio reception or transmission device.
10. The display unit according to claim 1 , wherein the predetermined amplitude pulse is configured to be varied based on one or more of a plurality of parameters, the parameters comprising color, field, or frame.