Abstract:
A display panel includes input power supply line coupled to a power supply at one or more edge portions of the display panel, and an output power supply line coupled to the input power supply line at a predetermined portion of the display panel. The input power supply line receives the power supply voltage, and the output power supply line receives the power supply voltage from the input power supply line. The power supply is coupled to the output power supply line at the one or more edge portions of the display panel, and receives the power supply voltage from the output power supply line to adjust a voltage level of the power supply voltage based on the power supply voltage from the output power supply line. The predetermined portion is at a location different from an edge of the display panel.
Abstract:
An organic light emitting display includes a display panel, a power supply circuit, a voltage detection unit and a voltage compensation unit. The display panel includes a plurality of pixels. The power supply circuit outputs a first power source to the display panel. The voltage detection unit is positioned between the display panel and the power supply circuit, and detects a detection voltage data of the first power source output from the power supply circuit. The voltage compensation unit compares the detection voltage data with a previously stored reference voltage data, and controls the power supply circuit to output the first power source having a voltage level set based on the reference voltage data.
Abstract:
A display device includes a voltage supply unit to output a first voltage, a switch unit to selectively output the first voltage or a second voltage, a coupling member to transfer a third voltage to a display panel, and a feedback unit to selectively feed back the first voltage or the third voltage. The voltage supply unit receives a voltage based on the first voltage or the third voltage selected by the feedback unit, and the third voltage is based on the first voltage output from the switch unit. The voltage supply unit may compensate for drops in a control voltage of the display panel based on the fed back voltage.
Abstract:
A power voltage generating apparatus supplies a power voltage to a plurality of pixel circuits of a display apparatus. The power voltage generating apparatus includes: a high voltage converter to generate a high voltage; a low voltage converter to generate a low voltage; a switching circuit to alternately output the high voltage and the low voltage at a power voltage terminal as the power voltage; and a discharging unit coupled to the power voltage terminal and configured to discharge the power voltage terminal until a voltage output is converted from the high voltage to the low voltage by using the switching circuit.
Abstract:
A display panel with multiple pixel circuit regions and separate scan lines is disclosed. One aspect is a display panel of a flat panel display device that includes left pixel circuits arranged in a left region of the display panel, right pixel circuits arranged in a right region of the display panel, left scan-lines coupled to the left pixel circuits, the left scan-lines transmitting a first scan signal to the left pixel circuits, right scan-lines coupled to the right pixel circuits, the right scan-lines transmitting a second scan signal to the right pixel circuits, and data-lines coupled to the left pixel circuits and the right pixel circuits, the data-lines transmitting a data signal to the left pixel circuits and the right pixel circuits. Here, the first scan signal and the second scan signal are transmitted to the left pixel circuits and the right pixel circuits constituting each horizontal-line via the left scan-lines and the right scan-lines with at least one predetermined time delay.
Abstract:
An organic light emitting display device includes: a panel having sections and blocks, pixels included in the blocks to control an amount of current flowing from a first power source to a second power source via organic light emitting diodes; a data driver to receive data, and generate the data signals; a sensing unit connected to the power supply unit, and to detect an amount of current flowing in each of the blocks; and a timing controller to generate a correction value to adjust the data in view of the amount of current.
Abstract:
A display panel includes data lines and scan lines extending from a peripheral region to a display region, a plurality of data pads, and a plurality of dummy pads. First voltage lines extend from the peripheral region to the display region, and are connected to pixel circuits to provide a first voltage to light emitting devices. The display panel also has a repair line group including at least one first repair line and a plurality of second repair lines. The at least one first repair line has an end connected to a first one of the dummy pads in the peripheral region and another end connected to a corresponding one of the first voltage lines at a first position in the display region. The second repair lines are not connected to the dummy pads and the first voltage lines.
Abstract:
A source driver includes: a gamma voltage generator configured to receive a plurality of gamma reference voltages, a first common pre-emphasis voltage, and a second common pre-emphasis voltage, and to generate a plurality of gamma voltages based on the gamma reference voltages, a plurality of first pre-emphasis pulses respectively corresponding to pixels that emit light of different colors based on the first common pre-emphasis voltage, and a plurality of second pre-emphasis pulses respectively corresponding to the pixels that emit the light of different colors based on the second common pre-emphasis voltage; and a voltage supply unit configured to output one of the first pre-emphasis pulses and the second pre-emphasis pulses to each of a plurality of data lines, and to output data voltages to the plurality of data lines based on the gamma voltages.
Abstract:
A DC-DC converter includes: a converter including a first transistor, a second transistor and an inductor; a first gate driver and a second gate driver configured to respectively control the first and second transistors; a pulse width modulation (PWM) control circuit configured to output a PWM signal to the first gate driver and a first logic circuit, the first logic circuit configured to receive the PWM signal and a second logic signal, and to output a first logic signal to the second gate driver; and a second logic circuit configured to receive a first control signal and a second control signal, and to output the second logic signal to the first logic circuit.
Abstract:
There are provided an organic light emitting display device and a driving method thereof, capable of precisely compensating for the degradation of pixels. The device includes a display panel including a pixel; a test-data generator configured to output first test data for emitting light in a first region during a first period to the display panel and to output second test data for emitting light in a second region during a second period to the display panel, a current measurer configured to generate a first value corresponding to a current level of a power line during the first period and to generate a second value corresponding to a current level of the power line during the second period, and a parameter adjustor configured to adjust a parameter of a life model equation of the pixel until a difference between the first and second values is within a predetermined range.