Sony Semiconductor Solutions Corporation

Sony Corporation

Sony Group Corporation

Takaaki Sugiyama

Ken Kikuchi

Genichiro Oga

Masaki Yoshioka

Takehiro Misonou

Ken Kitamura

Takahiro Kita

Masaru Chibashi

Kenji Watanabe

Motoyasu Yano

Hirokazu Imai

Hiroshi Tobita

Atsushi Yasuda

Eiji Nagasaka

Takayuki Kubota

A display device of the present disclosure is provided with a pixel circuit that includes a light-emitting element; a current modulator that controls a current value flowing through the light-emitting element; a current breaker that interrupts a current flowing through the light-emitting element; and a gray-scale controller that controls the current modulator and the current breaker to perform gray-scale control. The gray-scale controller discretely controls a light emission duty of the light-emitting element through the current breaker, and controls, through the current modulator, the current value flowing through the light-emitting element in accordance with the light emission duty of the light-emitting element.

Display device, method of driving display device, and electronic apparatus

A display apparatus according to an embodiment of the present disclosure includes: a display panel including a plurality of pixels; and a drive device that outputs a driving signal to the display panel. The driving signal causes one of the pixels to emit light many times by an active PWM drive method in a 1-frame period.

Drive device and display apparatus

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.

Display apparatus

A comparator circuit according to the present disclosure includes a first switch section that selectively takes in a signal voltage, a second switch section that selectively takes in a control waveform, a differential amplifier including a non-inverted input end connected to each of output ends of the first switch section and the second switch section, a capacity section including one end connected to an inverted input end of the differential amplifier and the other end supplied with a reference voltage, and a third switch section that selectively short-circuits the inverted input end and an output end of the differential amplifier.

Comparator circuit, A/D conversion circuit, and display apparatus

A sample-and-hold circuit of the disclosure includes: a differential pair that includes a first MOS transistor and a second MOS transistor, in which respective source terminals of the first MOS transistor and the second MOS transistor are interconnected to a specified node, and an input signal is input to a gate terminal of the first MOS transistor; a capacitor that is coupled to a gate terminal of the second MOS transistor, and samples and holds the input signal; a switch transistor that has a source terminal coupled to the capacitor and the gate terminal of the second MOS transistor, and causes the capacitor to sample and hold the input signal upon application of a predetermined ON voltage; and an ON-voltage control transistor that couples a gate terminal of the switch transistor to the specified node when causing the input signal to be sampled and held.

Sample- and-hold circuit and display device

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.

Comparator unit, display, and method of driving display

A comparator circuit according to the present disclosure includes: a first switch section that selectively takes in a signal voltage; a second switch section that selectively takes in a control waveform; a differential amplifier including a non-inverted input end connected to each of output ends of the first switch section and the second switch section; a capacity section including one end connected to an inverted input end of the differential amplifier and the other end supplied with a reference voltage; and a third switch section that selectively short-circuits the inverted input end and an output end of the differential amplifier.

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.

Display unit, method of driving the same, and control pulse generation device

A comparator circuit includes a differential circuit unit which detects a difference between two input signals, a current supply unit which supplies a current to the differential circuit unit, and a control unit which detects an operation timing of the differential circuit unit and controls the current supplied to the differential circuit unit by the current supply unit according to a detection result thereof.

Comparator circuit, comparator circuit control method, A/D conversion circuit, and display apparatus

A level converting circuit includes a level converting part and a bias part. The level converting part includes at least first to fourth n-type field effect transistors and first and second p-type field effect transistors. The bias part includes a fifth n-type field effect transistor, a voltage drop part including at least one resistive element, and a current source having a power-supply-side terminal connected to a voltage source of a voltage higher than a first voltage. The bias part generates a bias voltage higher than the first voltage by the threshold voltage of the first and second n-type field effect transistors or a bias voltage that is higher than the first voltage and lower than the threshold voltage at the side of one end of the resistive element, and supplies the bias voltage to the gates of the first and second n-type field effect transistors in the level converting part.

Level converting circuit, display device, and electronic apparatus

Disclosed herein is a digital-to-analog converter. The digital-to-analog converter includes: a higher resistor string; a lower resistor string; an operational amplifier; a higher selector; a lower selector; a first switch; a higher capacitor; a second switch; a third switch; and a control circuit.

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Kanagawa, Japan

Takaaki Sugiyama