Lg Display Co., Ltd.

Hanjin Bae

Seungtae Kim

Junghyeon Kim

Sangho Yu

Bumsik Kim

Jinhan Yoon

YunSik Jeong

JungHyeon Kim

A display device is disclosed. The display device includes a display panel including data lines, panel lines, scan lines, and pixels, a power circuit configured to output a reference voltage for initializing subpixels of the pixels, a plurality of branch lines configured to divide a path of the reference voltage into a plurality of paths, and a switch circuit configured to switch a path between the branch lines and the panel lines in response to a switch control signal. The switch circuit changes the path between the branch lines and the panel lines at intervals of predetermined time.

Display device including reference voltage supply

The present invention provides a display device that comprises a display panel displaying an image, M reference voltage generators (M is an integer of 2 or greater) that respectively supply reference voltages to N display areas (N is an integer of 2 or greater) defined on the display panel, and a voltage variation corrector that corrects for voltage variations between the M reference voltages (M is an integer of 2 or greater).

Display device that corrects for variations between reference voltages and method for driving the same

An organic light emitting display can include a display panel including pixels, a degradation sensing circuit to sense a threshold voltage of organic light emitting diodes (OLEDs) in the pixels and calculate an average degradation value based on the sensed threshold voltage of the OLEDs, a compensation target adjustor to adjust a compensation target based on the average degradation value, when the average degradation value is reduced by a previously determined reference value, and a data modulator to add and subtract a luminance compensation value determined depending on the adjusted compensation target to and from input digital video data and modulate the input digital video data. Also, each time the average degradation value is reduced by the previously determined reference value, the compensation target adjustor reduces stepwise the compensation target in conformity with changes in the average degradation value, and a stepwise adjustment width of the compensation target is non-uniform.

Organic light emitting display for luminance degradation compensation and a method thereof

An organic light emitting display includes a display panel including pixels, a degradation sensing circuit which senses a threshold voltage of organic light emitting diodes included in the pixels and calculates an average degradation value defined by an average luminance value due to the degradation based on the sensed threshold voltage, a compensation target adjustor which adjusts a compensation target based on the average degradation value, each time the average degradation value is reduced by a previously determined reference value, and a data modulator which adds and subtracts a luminance compensation value determined depending on the adjusted compensation target to and from digital video data and modulates the digital video data.

Organic light emitting display and degradation compensation method thereof

Disclosed are an organic light emitting diode display, which can reduce image sticking caused by the deterioration of an organic light emitting diode, and a driving method thereof. The organic light emitting diode display comprises: a display panel comprising a plurality of pixels arranged in a matrix at intersections of gate line portions and data line portions and each having an organic light emitting diode; a memory for storing compensation data; a timing controller for modulating input digital video data based on the compensation data and generating modulated data; and a data driving circuit for, during compensation driving, generating the compensation data to compensate for a difference in the deterioration of the organic light emitting diodes by supplying a sensing voltage to the pixels and sampling the threshold voltage of the organic light emitting diodes, which is fed back from the pixels, and for, during normal driving, converting the modulated data into a data voltage and supplying the data voltage to the pixels.

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Seoul, South Korea

Hanjin Bae