Abstract: A display apparatus includes pixels arranged in a two-dimensional matrix pattern, each of which including a light-emitting unit and a drive circuit that drives the unit and includes a comparator circuit that compares a control pulse with potential based on signal voltage and outputs predetermined voltage based on the result, a transistor driving the unit in response to the predetermined voltage, and a current source that supplies current to the unit during driving of the transistor, includes a current-source transistor, a capacity unit connected to a gate electrode of the current-source transistor, a differential amplifier that detects a differential between voltage based on reference constant current and reference voltage, and a transistor controlling the voltage based on reference constant current depending on current flowing through the current-source transistor, and controls gate potential of the current-source transistor on the basis of output of the amplifier in synchronization with a scanning signal.

Abstract: A comparator unit includes: a comparison section configured to compare a control pulse with an electric potential based on a signal voltage; and a control section configured to control, based on the control pulse, operation and non-operation of the comparison section.

Abstract: A display unit includes a pixel group having pixels. Each of the pixels includes a light emitting section and a drive circuit. The pixel group is divided into P pieces of pixel blocks. The display unit is configured to allow the light emitting sections from the light emitting sections configuring the respective pixels in a first pixel block of the P pieces of pixel blocks to the light emitting sections configuring the respective pixels in a P-th pixel block of the P pieces of pixel blocks to sequentially emit light together on a pixel block basis, and when the light emitting sections configuring the respective pixels in pixel blocks of the P pieces of pixel blocks emit light, configured to allow the light emitting sections configuring the respective pixels in remaining pixel blocks of the P pieces of pixel blocks not to emit light.

Abstract: A comparator unit includes: a comparison section configured to compare a control pulse with an electric potential based on a signal voltage; and a control section configured to control, based on the control pulse, operation and non-operation of the comparison section.

Abstract: A comparator unit includes: a comparison section configured to compare a control pulse with an electric potential based on a signal voltage; and a control section configured to control, based on the control pulse, operation and non-operation of the comparison section.

Abstract: A display apparatus includes pixels arranged in a two-dimensional matrix pattern, each of which including a light-emitting unit and a drive circuit that drives the unit and includes a comparator circuit that compares a control pulse with potential based on signal voltage and outputs predetermined voltage based on the result, a transistor driving the unit in response to the predetermined voltage, and a current source that supplies current to the unit during driving of the transistor, includes a current-source transistor, a capacity unit connected to a gate electrode of the current-source transistor, a differential amplifier that detects a differential between voltage based on reference constant current and reference voltage, and a transistor controlling the voltage based on reference constant current depending on current flowing through the current-source transistor, and controls gate potential of the current-source transistor on the basis of output of the amplifier in synchronization with a scanning signal.

Abstract: A display apparatus includes pixels arranged in a two-dimensional matrix pattern, each of which including a light-emitting unit and a drive circuit that drives the unit and includes a comparator circuit that compares a control pulse with potential based on signal voltage and outputs predetermined voltage based on the result, a transistor driving the unit in response to the predetermined voltage, and a current source that supplies current to the unit during driving of the transistor, includes a current-source transistor, a capacity unit connected to a gate electrode of the current-source transistor, a differential amplifier that detects a differential between voltage based on reference constant current and reference voltage, and a transistor controlling the voltage based on reference constant current depending on current flowing through the current-source transistor, and controls gate potential of the current-source transistor on the basis of output of the amplifier in synchronization with a scanning signal.

Abstract: A display apparatus includes pixels arranged in a two-dimensional matrix pattern, each of which including a light-emitting unit and a drive circuit that drives the unit and includes a comparator circuit that compares a control pulse with potential based on signal voltage and outputs predetermined voltage based on the result, a transistor driving the unit in response to the predetermined voltage, and a current source that supplies current to the unit during driving of the transistor, includes a current-source transistor, a capacity unit connected to a gate electrode of the current-source transistor, a differential amplifier that detects a differential between voltage based on reference constant current and reference voltage, and a transistor controlling the voltage based on reference constant current depending on current flowing through the current-source transistor, and controls gate potential of the current-source transistor on the basis of output of the amplifier in synchronization with a scanning signal.

Abstract: A display unit includes a pixel group having pixels. Each of the pixels includes a light emitting section and a drive circuit. The pixel group is divided into P pieces of pixel blocks. The display unit is configured to allow the light emitting sections from the light emitting sections configuring the respective pixels in a first pixel block of the P pieces of pixel blocks to the light emitting sections configuring the respective pixels in a P-th pixel block of the P pieces of pixel blocks to sequentially emit light together on a pixel block basis, and when the light emitting sections configuring the respective pixels in pixel blocks of the P pieces of pixel blocks emit light, configured to allow the light emitting sections configuring the respective pixels in remaining pixel blocks of the P pieces of pixel blocks not to emit light.

Abstract: A comparator unit includes: a comparison section configured to compare a control pulse with an electric potential based on a signal voltage; and a control section configured to control, based on the control pulse, operation and non-operation of the comparison section.

Abstract: A vending apparatus has a plurality of cash-less vending machines installed in guest rooms and meeting rooms and at any other suitable places in hotels and supermarkets, and any customers who want to use the vending machines may have their own memory holders from a front or cashier. Upon insertion of the memory holder into the vending machine and depression of a merchandise selection button or the like, a selected merchandise is discharged from the vending machine while sales information such as a code and price of the sold merchandise is stored in memory element in the holder, and when the memory holder is returned and inserted into an accounting machine, the sales information is read out from the memory holder to prepare a bill. The vending machines and the accounting machine are enabled in response to the output from a sensor which detects the insertion of the memory holder.