Compensation circuit and display device including same
AssigneeLG Display Co., Ltd.
InventorsDong Gun Lee, Bo Yun Jung
Life of this patent
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Abstract
A display device including a display panel including data lines, gate lines, and pixels applied with pixel driving voltages; a data driver configured to supply pixel data to the data lines; a power supply configured to apply the pixel driving voltage to the pixels; and a compensation circuit configured to generate a pixel driving voltage drop amount using a pixel driving voltage applied from the power supply and a pixel driving voltage fed back from a central portion of the display panel, amplify the generated pixel driving voltage drop amount using a predetermined gain value, and generate a compensation voltage value for compensating a gamma reference voltage for a corresponding pixel using the amplified pixel driving voltage drop amount.
Claims21
A compensation circuit comprising:
- a voltage calculator configured to generate a pixel driving voltage drop amount using a pixel driving voltage applied from a power supply and a pixel driving voltage fed back directly from a midpoint of a first voltage wire, the midpoint being physically equidistant from upper and lower ends of the first voltage wire;
- a gain compensator configured to amplify the generated pixel driving voltage drop amount using a predetermined gain value;
- and
- a voltage compensator configured to generate a compensation voltage value for compensating a gamma reference voltage for a corresponding pixel using the amplified pixel driving voltage drop amount,
- wherein the first voltage wire is formed to extend continuously and entirely within a non-active area on a side of a display panel and is separated from pixel lines disposed in an active area of the display panel, and
- wherein a plurality of second voltage wires branch from the first voltage wire into the active area to sense the pixel driving voltage from the pixel lines.
A display device comprising:
- a display panel including data lines, gate lines, and pixels applied with pixel driving voltages;
- a data driver configured to supply pixel data to the data lines;
- a power supply configured to apply the pixel driving voltage to the pixels;
- and
- a compensation circuit configured to:
- generate a pixel driving voltage drop amount using a pixel driving voltage applied from the power supply and a pixel driving voltage fed back directly from a midpoint of a first voltage wire, the midpoint being physically equidistant from upper and lower ends of the first voltage wire,
- amplify the generated pixel driving voltage drop amount using a predetermined gain value, and
- generate a compensation voltage value for compensating a gamma reference voltage for a corresponding pixel using the amplified pixel driving voltage drop amount,
- wherein the first voltage wire is formed to extend continuously and entirely within a non-active area on a side of the display panel and is separated from pixel lines disposed in an active area of the display panel, and
- wherein a plurality of second voltage wires branch from the first voltage wire into the active area to sense the pixel driving voltage from the pixel lines.
Dependencies are inferred from the claim text.