The disclosure describes various aspects of backplanes, including unit cells, architectures, and operations. In an aspect, a backplane unit cell is described that includes first and second switches, a storage element, a comparator, a source (e.g., a current or voltage source), where the source generates a drive signal to control light emission of a selected one of the light emitting elements in a display, and where the drive signal is based on a power signal selected by the second switch. In another aspect, a device is described that includes a backplane configured in an active matrix topology including multiple data columns and multiple row selects; and a set of electrical contacts associated with the active matrix topology and configured to electrically couple the backplane with the display, the display having multiple light emitting elements configured in a passive matrix topology. Methods of operation of the backplane are also described.

The present disclosure generally relates to a method of sensing characteristic value of circuit element and display device using it, which may shorten the threshold voltage sensing and compensation time of the driving transistor and the threshold voltage compensation time driving transistors by sensing the threshold voltage in a mobility sensing period of the driving transistor, calculate the threshold voltage using two or more sensing values of driving current for the driving transistor.

A driving circuit includes at least one pixel circuit and a control circuit. A pixel circuit is configured to write a first data signal in response to a scan signal, and generate a first driving signal according to a first signal and the first data signal. The control circuit is configured to monitor the first driving signal and provide another first data signal to the pixel circuit according to a second data signal and the first driving signal. The pixel circuit is further configured to provide another first driving signal to a light-emitting device according to the first signal and the another first data signal, and in response to an enable signal of the enable signal terminal, provide a second driving signal to the light-emitting device according to a second signal and the another first data signal.

The present disclosure relates to a pixel sensing circuit in which a test is performed only on selected specific channels among channels of the pixel sensing circuit and the total test time of the pixel sensing circuit and data throughput for the test may be reduced.

A lighting device is disclosed that includes a plurality of light emitting diodes arranged in an array, a plurality of trenches disposed between and optically isolating the light emitting diodes, and a patterned converter layer disposed over an array surface formed by light emitting surfaces of the light emitting diodes and upper surfaces of the trenches, the patterned converter layers including a first region having a first converter and a second region having a second converter different from the first converter, the first region and second region disposed over different areas of the array surface.

A display device includes a display panel including a display area having pixels, and a non-display area surrounding the display area, and having a pad portion at one side, the display area including a first sub-display area overlapping the pad portion in a second direction, and a second sub-display area at one side of the first sub-display area, and including a data line, the first sub-display area including a data line, a first gate line on one side of some of the pixels, a first connection line located on one side of others of the pixels, and a second connection line connected to the first connection line, and extending to the second sub-display area in a first direction crossing the second direction, and wherein the data line is electrically connected to the pad portion through the first connection line and the second connection line.

The present application provides a display device. The display device includes a pixel circuit and multiple operational amplifiers. Pixel units in the same column are electrically connected to the same operational amplifier. The display device of the present application uses the operational amplifier to stabilize a voltage and amplify a current, which solves non-uniformity of the display panel caused by the difference in a threshold voltage and channel electron mobility of the thin film transistor due to an immature manufacturing process of a thin film transistor, so uniformity of the panel is improved.

A current mirror circuit includes a first transistor configured to be supplied with a data current from a data driving circuit; a second transistor configured to drive a light emitting diode by mirroring the data current transferred to the first transistor; and a voltage compensation circuit disposed between one terminal of the first transistor and one terminal of the second transistor and configured to compensate for a difference between voltages of the one terminals of the first transistor and the second transistor.

A pixel circuit, a display substrate, a display device and a driving method are provided. The pixel circuit includes a data writing sub-circuit and a driving sub-circuit, and the data writing sub-circuit is connected to a scan signal terminal, a control signal terminal, a data signal terminal and a drive sub circuit. The data writing sub-circuit is used to output a data signal from the data signal terminal to the control node in response to a control signal provided by the control signal terminal and a scan signal provided by the scan signal terminal. The driving sub-circuit is connected to the control node, a power signal terminal and a light-emitting element, respectively, and is used to drive the light-emitting element to emit light in response to a potential of the control node and a power signal provided by the power signal terminal.

An object is to provide a semiconductor device that automatically adjusts the luminance of a display device. The semiconductor device includes an illuminometer, a threshold detector, a timing controller, a digital-to-analog converter circuit, a first display panel, and a second display panel. The illuminance of external light is measured with the illuminometer, and the threshold value of digital video data is determined by the threshold detector in accordance with the illuminance. The timing controller generates a signal for the first display panel or a signal for the second display panel on the basis of the threshold value and video data transmitted from the outside. The signal for the first display panel and the signal for the second display panel are input to one digital-to-analog converter circuit and converted into digital signals, and the obtained digital signals are input to a corresponding one of the first display panel and the second display panel.