Abstract:
A display apparatus includes: a display panel which displays an image based on a display mode; a data driver which provides data signals to the display panel; a gate driver which starts an operation thereof in response to a start signal, and comprises stages and at least two dummy stages, where the stages sequentially provides gate signals to the display panel; and a timing controller which selects a signal from the start signal and a reset signal based on the display mode and outputs the selected signal selected to the at least two dummy stages, where each stage receives a clock signal, a previous carry signal from a previous stage, a first subsequent carry signal from a first subsequent stage and a second subsequent carry signal from a second subsequent stage, and outputs a corresponding gate signal of the gate signals and a carry signal.
Abstract:
A gate drive circuit includes a plurality of driving stages. An n-th (‘n’ is a natural number) driving stage includes a pull-up part, a carry part, a first pull-down part, a first pull-up/down control part and a second pull-up/down control part. The first pull-up/down control part applies a first power signal of an ON voltage to a control terminal of the pull-up part in a forward direction mode, and applies the first power signal of a second OFF voltage to a control terminal of the pull-up part in a reverse direction mode. The second pull-up/down control part applies a second power signal of the second OFF voltage to the control terminal of the pull-up part in the forward direction mode, and applies the second power signal of the ON voltage to the control terminal of the pull-up part in the reverse direction mode.
Abstract:
A display panel includes a display area, a peripheral area which includes a first peripheral area, and a second peripheral area opposite to the first peripheral area, a plurality of pixels in the display area, a plurality of data lines, a first gate line, a second gate line, a first gate driving circuit and a second gate driving circuit. Each data line corresponds to two pixel columns. The first gate line is at a first side of a pixel row. The second gate line is at a second side of the pixel row. The first gate driving circuit is in the first peripheral area and includes a first stage which provides a gate signal to the first gate line. The second gate driving circuit is in a second peripheral area of the display area and includes a second stage which provides a gate signal to the second gate line.
Abstract:
A light source device includes a light source module having a light-emitting block, an image analysis part, a duty ratio calculation part, a duty ratio determination part and a signal generation part. The image analysis part extracts representative luminance data of the light-emitting block based on pixel data. The duty ratio calculation part calculates duty ratio data of the light-emitting block based on the representative luminance data. The duty ratio determination part generates determined duty ratio data of the light-emitting block based on the duty ratio data from a first period, and the signal generation part generates a driving signal having a duty ratio corresponding to the determined duty ratio data to drive the light-emitting block.
Abstract:
A method of driving a display panel includes applying a common voltage to the display panel, sensing a frequency of the display panel to generate a frequency signal, adjusting a gain of an operational amplifier based on the frequency signal, receiving a feedback common voltage from the display panel, and compensating the common voltage using an input resistor, the operational amplifier and a feedback resistor based on the feedback common voltage to apply the compensated common voltage to the display panel. The operational amplifier includes an inverting input terminal connected to the input resistor, a non-inverting input terminal to which a reference common voltage is applied and an output terminal. The feedback resistor is between the inverting input terminal and the output terminal.
Abstract:
A gate drive circuit includes a shift register in which plural stages are cascade-connected to each other. In an n-th stage, a pull-up part outputs a high voltage of a clock signal to an output node as a high voltage of an n-th gate signal in response to a high voltage on a first node. A pull-down part pulls the high voltage of the n-th gate signal down to a first low voltage in response to an (n+1)th carry signal. A discharging part discharges the first node to a second low voltage level lower than the first low voltage level in response to the (n+1)th carry signal. A carry part outputs the high voltage of the clock signal as an n-th carry signal (mirroring the n-th gate signal) in response to a high voltage on the first node.
Abstract:
A display device includes a display panel, a data driving part and a gate driving part. The display panel includes a first pixel row. The first pixel row includes a first pixel connected to an (n+1)-th gate line and an (m+1)-th data line (where ‘n’ and ‘m’ are natural numbers), and a second pixel connected to an n-th gate line and an (m+2)-th data line. The data driving part applies a data voltage having a first polarity with respect to a reference voltage to the (m+1)-th data line, and applies a data voltage having a second polarity with respect to the reference voltage to the (m+2)-th data line. The gate driving part sequentially applies a gate signal to the n-th gate line and the (n+1)-th gate line.