Image display apparatus

An image display apparatus comprising:

• a plurality of scanning wires distributively arranged in an image display region for transmitting a scanning signal;
• a plurality of signal wires arranged to intersect with said plurality of scanning wires in said image display region for transmitting a signal voltage;
• a plurality of current driven electro-optical display elements each arranged in a pixel region surrounded by each said scanning wire and each said signal wire and connected to a common power supply;
• a plurality of driving elements each connected in series with each said electro-optical display element, connected to said common power supply, and applied with a bias voltage to drive each said electro-optical display element for display;
• and
• a plurality of memory control circuits each for holding said signal voltage in response to said scanning signal to control driving of each said driving element based on said held signal voltage, wherein each said memory control circuit samples and holds said signal voltage while blocking a connection with each said driving element, and subsequently releases said blocked state to apply each said driving element with said held signal voltage as said bias voltage.

An image display apparatus comprising:

• a plurality of scanning wires distributively arranged in an image display region for transmitting a scanning signal;
• a plurality of signal wires arranged to intersect with said plurality of scanning wires in said image display region for transmitting a signal voltage;
• a plurality of memory circuits each arranged in a pixel region surrounded by each said scanning wire and each said signal wire for holding said signal voltage in response to said scanning signal;
• a plurality of current driven electro-optical display elements each arranged in said each pixel region and connected to a common power supply;
• and
• a plurality of driving elements each connected in series with each said electro-optical display element, connected to said common power supply, and applied with a bias voltage to drive each said electro-optical display element for display;
• wherein each said memory circuit includes a sampling switch element responsive to said scanning signal to conduct for sampling said signal voltage, and a sampling capacitor for holding a signal voltage sampled by said sampling switch element, each said sampling capacitor having one end connected to the common power supply through each said driving element or a power supply wire, each said sampling capacitor having the other end connected to a gate electrode of each said driving element, and
• in a sampling period in which said sampling switch element of each said memory circuit holds the signal voltage, each said driving element is brought into a non-driving state by changing a voltage of said common power supply or maintaining a potential on a common electrode shared by said driving elements in said common power supply at a ground potential, and each said driving element is applied with a bias voltage after said sampling period has passed.

An image display apparatus comprising:

• a plurality of scanning wires distributively arranged in an image display region for transmitting a scanning signal;
• a plurality of signal wires arranged to intersect with said plurality of scanning wires in said image display region for transmitting a signal voltage;
• a plurality of memory circuits each arranged in a pixel region surrounded by each said scanning wire and each said signal wire for holding said signal voltage in response to said scanning signal;
• a plurality of current driven electro-optical display elements each arranged in said each pixel region and connected to a common power supply;
• a plurality of driving elements each connected in series with each said electro-optical display element, connected to said common power supply, and applied with a bias voltage to drive each said electro-optical display element for display;
• and
• a plurality of power supply control elements for controlling electric power supplied from said common power supply to each said driving element,
• wherein each said memory circuit includes a sampling switch element responsive to said scanning signal to conduct for sampling said signal voltage, and a sampling capacitor for holding a signal voltage sampled by said sampling switch element, each said sampling capacitor having one end connected to the common power supply through each said driving element or a power supply wire, each said sampling capacitor having the other end connected to a gate electrode of each said driving element, and
• in a sampling period in which said sampling switch element of each said memory circuit holds the signal voltage, each said power supply control element stops supplying the electric power to each said driving element, and supplies the electric power to each said driving element after said sampling period has passed.

An image display apparatus comprising:

• a plurality of scanning wires distributively arranged in an image display region for transmitting a scanning signal;
• a plurality of signal wires arranged to intersect with said plurality of scanning wires in said image display region for transmitting a signal voltage;
• a plurality of current driven electro-optical display elements each arranged in a pixel region surrounded by each said scanning wire and each said signal wire and connected to a common power supply;
• a plurality of driving elements each connected in series with each said electro-optical display element, connected to said common power supply, and applied with a bias voltage to drive each said electro-optical display element for display;
• and
• a plurality of memory control circuits each for holding said signal voltage in response to said scanning signal to control driving of each said driving element based on said held signal voltage, wherein each memory control circuit executes a sampling operation for sampling said signal voltage in response to said scanning signal and holding the sampled signal voltage, a floating operation, following said sampling operation, for holding said signal voltage in an electrically insulated state from each said signal wire and each said driving element, and a bias voltage applying operation, following said floating operation, for applying each said driving element with said held signal voltage as a bias voltage.