Image display device
An image display device includes pixels arranged in a matrix form on a grass. Each of the pixels includes: a drive circuit disposed on the grass and configured to receive a power supply control signal and an analog image signal; and an inorganic semiconductor light emitting element mounted on the drive circuit and electrically connected to the drive circuit. The inorganic semiconductor light emitting element is configured to emit a light based on a driving current provided from the drive circuit. The power supply control signal is applied at once to the pixels. The drive circuit is configured to control a grayscale of a light emitted by the inorganic semiconductor light emitting element by controlling a pulse width of a driving current having an amplitude corresponding to a voltage of the power supply control signal based on a voltage of the analog image signal.
1. An image display device comprising:
a plurality of pixels arranged in a matrix form on a substrate,
each of the plurality of pixels comprising:
a pixel circuit disposed on the substrate and configured to receive a power supply control signal and an analog image signal; and
an inorganic semiconductor light emitting element mounted on the pixel circuit and electrically connected to the pixel circuit, the inorganic semiconductor light emitting element being configured to emit a light based on a driving current provided from the pixel circuit,
wherein the power supply control signal is applied at once to the plurality of pixels, and
wherein the pixel circuit is configured to control a grayscale of a light emitted by the inorganic semiconductor light emitting element by controlling a pulse width of a driving current having an amplitude corresponding to a voltage of the power supply control signal based on a voltage of the analog image signal.
2. The image display device according to claim 1 , wherein the pixel circuit comprises:
a power supply control circuit including a first driving transistor and configured to control the amplitude of the drive current based on the voltage of the power supply control signal; and
a PWM driving circuit including a second driving transistor and configured to control the pulse width of the driving current based on the voltage of the analog image signal.
3. The image display device according to claim 2 , wherein the power supply control circuit is connected to the PWM driving circuit of a pixel which does not include the power supply control circuit among the pixels.
4. The image display device according to claim 1 , further comprising:
a scanning circuit configured to generate a first scanning signal to be supplied to a first scanning line and a second scanning signal to be supplied to a second scanning line.
5. The image display device according to claim 2 ,
wherein the pixel circuit is connected between a first power line and a second power line, the second power line being set to a potential lower than a potential of the first power line,
wherein the power supply control circuit is connected between a first power supply line and the PWM driving circuit.
6. The image display device according to claim 2 , wherein the pixel circuit is connected between a first power line and a second power line, the second power line being set to a potential lower than a potential of the first power line,
wherein the power supply control circuit is connected between the PWM driving circuit and a second power supply line.