Display device and driving method of the same
Scan electrode potential detected by a feedback switch is inputted into a negative-phase input terminal of an amplifier, reference selection potential from a reference-selection-potential-signal generation circuit is inputted into a positive-phase input terminal of the amplifier, and the reference-selection-potential-signal generation circuit delays reference potential of a reference voltage source, thereby scan electrode potential without overshooting components can be achieved.
1. A display device, comprising,
a scan-electrode drive circuit for driving scan electrodes connected to a plurality of electron emitters disposed in a matrix pattern,
wherein the scan-electrode drive circuit includes,
a selection circuit for selecting the scan electrode,
a detection circuit for detecting electric potential of the selected scan electrode,
a correction circuit having one input into which the detected electric potential of the scan electrode is inputted,
and a generation circuit that inputs a reference selection potential signal into another input of the correction circuit,
wherein the generation circuit delays inputted reference voltage and outputs the reference selection potential signal, and
wherein the generation circuit includes,
a first voltage source for determining the reference voltage,
a first resistance connected to output of the first voltage source,
capacitance connected to one end of the first resistance, and
a second resistance and a switch, which are connected in series to a connection point between the first resistance and the capacitance.
2. The display device according to claim 1 ,
wherein the generation circuit delays the reference voltage by using resistance and capacitance and outputs the voltage as the reference selection potential signal.
3. A display device, comprising,
a scan-electrode drive circuit for driving scan electrodes connected to a plurality of electron emitters disposed in a matrix pattern,
wherein the scan-electrode drive circuit includes,
a selection circuit for selecting the scan electrode,
a detection circuit for detecting electric potential of the selected scan electrode,
a correction circuit having one input into which the detected electric potential of the scan electrode is inputted,
and a generation circuit that inputs a reference selection potential signal into another input of the correction circuit,
wherein the generation circuit delays inputted reference voltage and outputs the reference selection potential signal, and
wherein the generation circuit includes,
a first voltage source for determining the reference voltage,
a first resistance connected to output of the first voltage source,
capacitance connected to one end of the first resistance, and
a switch and a second voltage source, which are connected in series to a connection point between the first resistance and the capacitance.
4. A display device, comprising,
a display panel having a plurality of scan lines and a plurality of data lines that intersect with the scan lines, a plurality of electron emitters connected to both the lines, and phosphors that are allowed to emit light by electrons from the electron emitters,
a scan-electrode drive circuit connected to respective scan electrodes of the scan lines,
a data-electrode drive circuit connected to respective data electrodes of the data lines,
and a high-voltage circuit for converging the electrons from the electron emitters and irradiating the electrons to the phosphors,
wherein the scan-electrode drive circuit includes,
a selection circuit for selectin each of the scan electrodes,
a detection circuit for detecting electric potential of each of the scan electrodes,
a correction circuit that establishes predetermined electric potential for each of the scan electrodes based on scan electrode potential detected by the detection circuit, and
a generation circuit connected to an input side of the correction circuit,
wherein the correction circuit includes an amplifier,
wherein the generation circuit generates a reference selection potential signal in consideration of phase lag elements including capacitance of the display panel and the selection circuit, and
wherein the generation circuit includes,
a first voltage source for determining a DC level of the reference selection potential signal,
a first impedance element connected to output of the first voltage source,
a capacitance element connected to one end of the first impedance element, and
a second impedance element and a switch, which are connected in series to a connection point between the first impedance element and the capacitance element.
5. The display device according to claim 4 ,
wherein the correction circuit includes a reference signal input terminal into which a reference selection potential signal for determining electric potential of each of scan electrodes, and
wherein the generation circuit outputs the reference selection potential signal for gradually changing from non-selection potential to selection potential to the reference signal input terminal at the beginning of a selection period of horizontal scan.
6. A display device, comprising,
a display panel having a plurality of scan lines and a plurality of data lines that intersect with the scan lines, a plurality of electron emitters connected to both the lines, and phosphors that are allowed to emit light by electrons from the electron emitters,
a scan-electrode drive circuit connected to respective scan electrodes of the scan lines,
a data-electrode drive circuit connected to respective data electrodes of the data lines,
and a high-voltage circuit for converging the electrons from the electron emitters and irradiating the electrons to the phosphors,
wherein the scan-electrode drive circuit includes,
a selection circuit for selecting each of the scan electrodes,
a detection circuit for detecting electric potential of each of the scan electrodes,
a correction circuit that establishes predetermined electric potential for each of the scan electrodes based on scan electrode potential detected by the detection circuit, and
a generation circuit connected to an input side of the correction circuit,
wherein the correction circuit includes an amplifier,
wherein the generation circuit generates a reference selection potential signal in consideration of phase lag elements including capacitance of the display panel and the selection circuit, and
wherein the generation circuit includes,
a first voltage source for determining a DC level of the reference selection potential signal,
a first impedance element connected to output of the first voltage source,
a capacitance element connected to one end of the first impedance element, and
a switch and a second voltage source, which are connected in series to a connection point between the first impedance element and the capacitance element.
7. A method for driving a display panel including a display panel having a plurality of scan lines and a plurality of data lines that intersect with the scan lines, a plurality of electron emitters connected to both the lines, and phosphors that are allowed to emit light by electrons from the electron emitters, a scan-electrode drive circuit connected to respective scan electrodes of the scan lines, a data-electrode drive circuit connected to respective data electrodes of the data lines, and a high-voltage circuit for converging the electrons from the electron emitters and irradiating the electrons to the phosphors, wherein the scan-electrode drive circuit includes a selection circuit for selecting each of the scan electrodes, a detection circuit for detecting electric potential of each of the scan electrodes, a correction circuit that establishes predetermined electric potential for each of the scan electrodes based on scan electrode potential detected by the detection circuit, and a generation circuit connected to an input side of the correction circuit, wherein the correction circuit includes an amplifier, and the generation circuit generates a reference selection potential signal in consideration of phase lag elements including capacitance of the display panel and the selection circuit, and wherein the generation circuit includes a first voltage source for determining a DC level of the reference selection potential signal a first impedance element connected to output of the first voltage source, a capacitance element connected to one end of the first impedance element, and a second impedance element and a switch, which are connected in series, to a connection point between the first impedance element and the capacitance element; the method comprising steps of,
selecting a scan electrode by the selection circuit,
detecting the electric potential of the selected scan electrode by the detection circuit, and
supplying the reference selection potential signal having a delayed reference voltage from the generation circuit, such that the scan electrode is set to be in a predetermined electric potential by the correction circuit into which the detected electric potential of the scan electrode is inputted, to another input of the correction circuit.