JP2004045879A5 - - Google Patents

Claims (11)

Display elements formed in the vicinity of intersections of signal lines and scanning lines arranged vertically and horizontally;
A sensor that is provided corresponding to the display element and receives incident light and accumulates a charge corresponding to the amount of light received;
The sensor is
A photoelectric converter that outputs an electrical signal corresponding to the amount of received light;
A charge accumulating unit for accumulating electric charge according to the electrical signal;
An initialization control unit that switches whether or not the initial charge is stored in the charge storage unit, and an output control unit that switches whether or not to output a signal corresponding to the stored charge of the charge storage unit. Display device. The initialization control unit stores the initial charge in the charge storage unit in advance before the operation of the sensor,
The display device according to claim 1, wherein the photoelectric conversion unit causes the charge storage unit to discharge from the initial charge by an amount corresponding to an amount of light received by the photoelectric conversion unit. The initialization control unit stores the initial charge in the charge storage unit in advance before the operation of the sensor,
The display device according to claim 1, wherein the photoelectric conversion unit charges the charge storage unit by an amount corresponding to a charge corresponding to an amount of light received by the photoelectric conversion unit from the initial charge. Display elements formed in the vicinity of intersections of signal lines and scanning lines arranged vertically and horizontally;
A sensor that is provided corresponding to the display element and receives incident light and accumulates a charge corresponding to the amount of light received;
The sensor is
A photoelectric converter that outputs an electrical signal corresponding to the amount of received light;
A charge accumulating unit for accumulating electric charge according to the electrical signal;
A discharge controller that continuously discharges the stored charge of the charge storage unit by a predetermined amount;
An output control unit that switches whether to output a signal according to the accumulated charge of the charge accumulation unit,
The display device, wherein the photoelectric conversion unit causes the charge storage unit to charge or discharge only the charge unit corresponding to the amount of light received by the photoelectric conversion unit from the initial charge. Display elements formed in the vicinity of intersections of signal lines and scanning lines arranged vertically and horizontally;
A sensor that is provided corresponding to the display element and receives incident light and accumulates a charge corresponding to the amount of light received;
The sensor is
A plurality of photoelectric conversion units connected in series for outputting an electrical signal corresponding to the amount of received light; and
A charge accumulating unit for accumulating electric charge according to the electrical signal;
An initialization control unit that switches whether or not to store initial charge in the charge storage unit;
An output control unit that switches whether or not to output a signal corresponding to the accumulated charge of the charge accumulation unit; Display elements constituting a display screen formed in the vicinity of intersections of signal lines and scanning lines arranged in rows and columns;
A sensor provided in the display screen;
An A / D converter for A / D converting the output signal of the sensor,
The A / D converter is formed in a frame portion of an insulating substrate on which the signal lines and scanning lines, the display elements, and the sensors are formed. The A / D converter is
A first transistor, a capacitor, an amplifier, a second transistor, and a shift register connected in series on a detection line that supplies a signal corresponding to the charge stored in the charge storage unit;
The display device according to claim 6, further comprising: a third transistor that switches whether to set a voltage of a connection path between the first transistor and the capacitor to a predetermined voltage.   The A / D converter turns on the third transistor and stores the initial charge in the capacitor, and then turns on the first transistor, and whether the input voltage of the amplifier is higher than the operating threshold value of the amplifier. The display device according to claim 7, wherein A / D conversion is performed depending on whether or not.   9. The display device according to claim 7, wherein the amplifier is configured by connecting a plurality of inversion units including capacitors and inverters connected in series. Provided for each of the plurality of display elements, comprising an output selection unit capable of selecting any one of the output signals of the sensor corresponding to the plurality of display elements,
The display according to claim 6, wherein the A / D converter is provided for each of the output selection units, and performs A / D conversion on the output of the corresponding output selection unit. apparatus.   The display device according to claim 6, wherein the A / D converter includes a sensitivity improving unit configured by cascading a plurality of amplifiers each having an element characteristic compensating unit.