Image display apparatus and display control method

An image display apparatus comprising:

• an electron source having a plurality of electron-emitting devices arranged in a matrix form;
• a plurality of column direction wirings each of which is connected to electron-emitting devices arranged in each column of said plurality of electron-emitting devices;
• emission means, having emission substances corresponding to respective colors, for emitting light upon reception of electrons emitted by said electron source, thereby displaying a color image;
• modulation means for outputting a pulse signal having a pulse width corresponding to an image signal;
• a plurality of current control means each of which is assigned to a color to change a current of the pulse signal for driving each of the electron-emitting devices for irradiating the emission substances corresponding to its assigned color with electrons;
• and
• voltage sources for controlling said plurality of current control means respectively provided commonly to said plurality of column direction wirings in its associated color unit,
• wherein each of said plurality of current control means is capable of changing the current of the pulse signal for its assigned color independently to adjust that color, and
• wherein the pulse signal corresponding to each color is applied to each of said plurality of column direction wirings.

A display control method in an image display apparatus having an electron source with a plurality of electron-emitting devices arranged in a matrix form, emission substances corresponding to respective colors, a plurality of column direction wirings each of which is connected to electron-emitting devices arranged in each column of said plurality of electron-emitting devices and emission means for emitting light upon reception of electrons emitted by the electron source to display a color image, comprising:

• a modulation step of outputting a pulse signal having a modulated pulse width corresponding to an image signal;
• and
• a voltage control step of changing a voltage of the pulse signal for driving each of the electron-emitting devices for irradiating the emission substances corresponding to the respective colors with electrons,
• wherein said voltage control step changes a voltage of the pulse signal by a plurality of voltage control means provided commonly to the plurality of column direction wirings in its assigned color unit,
• wherein the voltage of the pulse signal is changeable independently for each color to adjust color displayed in said voltage control step, and
• wherein the pulse signal corresponding to each color is applied to each of the plurality of column direction wirings.

A display control method in an image display apparatus having an electron source with a plurality of electron-emitting devices arranged in a matrix form, emission substances corresponding to respective colors, a plurality of column direction wirings each of which is connected to electron-emitting devices arranged in each column of said plurality of electron-emitting devices, and emission means for emitting light upon reception of electrons emitted by the electron source to display a color image, comprising:

• a modulation step of outputting a pulse signal having a pulse width corresponding to an image signal;
• and
• a current control step of changing a current of the pulse signal for driving each of the electron-emitting devices for irradiating the emission substances corresponding to the respective colors with electrons,
• wherein said current control step changes a current of the pulse signal by a plurality of voltage sources provided commonly to the plurality of column direction wirings in its assigned color unit,
• wherein the current of the pulse signal is changeable independently for each color to adjust color displayed in said current control step, and
• wherein the pulse signal corresponding to each color is applied to each of the plurality of column direction wirings.

An image display apparatus comprising:

• a display panel in which devices are arranged at or near intersections of modulated-signal wirings and scanning wirings, and devices connected to a common modulated-signal wiring emit light of the same color;
• a control voltage source for supplying an adjustable control voltage corresponding to each color of light emitted by said display panel;
• a variable current source which is connected to the modulated-signal wiring, receives from said control voltage source a control voltage corresponding to a color of light emitted by devices connected to the modulated-signal wiring, and outputs a current corresponding to the control voltage to the modulated-signal wiring;
• and
• a modulated-signal driver for modulating the current output from said variable current source into a pulse having a width corresponding to an image signal value.

A display control method in an image display apparatus in which devices are arranged at or near intersections of modulated-signal wirings and scanning wirings, and devices connected to a common modulated-signal wiring emit light of the same color, comprising:

• the voltage control step of supplying an adjustable control voltage corresponding to each color of light emitted by a display panel;
• the variable current output step of receiving a control voltage corresponding to a color of light emitted by devices connected to the modulated-signal wiring, and outputting a current corresponding to the control voltage to the modulated-signal wiring;
• and
• the modulation step of modulating the current output from a variable current source into a pulse having a width corresponding to an image signal value.

An image display apparatus comprising:

• a display panel having devices, modulated-signal wirings and scanning wirings, said devices being connected to a common modulated signal wiring emit light of the same color;
• a plurality of control voltage sources each of which is assigned to a color to supply adjustable control voltage corresponding to each color of light emitted by said display panel and is capable of adjusting its assigned color independently;
• and
• a modulated-signal driver which is connected to said modulated-signal wiring, receives from said control voltage source a control voltage corresponding to a color of light emitted by devices connected to the modulated-signal wiring, and outputs the control voltage to the modulated-signal wiring,
• wherein said modulated-signal driver modulates the control voltage from said control voltage source into a modulated voltage pulse having a width corresponding to an image signal value, and
• wherein each of said plurality of voltage control sources is provided commonly to said modulated signal wirings in its assigned color unit.