Light emitting display device and driving method thereof
AssigneeLG Display Co., Ltd.
InventorsYi Yeon Hwang, Sung Wook Choi, Kil Hwan Oh
Life of this patent
Estimating the term…
Abstract
A light emitting display device can include a display panel configured to display an image; a driver configured to drive the display panel; a controller configured to control the driver; and a defect sensing circuit configured to sense a current through a driving voltage line transmitting a driving voltage for driving of the display panel, and output a sensing value based on the current for determining whether an element in a subpixel of the display panel is defective.
Claims19
A light emitting display device comprising:
- a display panel configured to display an image;
- a driver configured to drive the display panel;
- a controller configured to control the driver;
- and
- a defect sensing circuit configured to:
- sense a current through a driving voltage line transmitting a driving voltage for driving of the display panel, and
- output a sensing value based on the current for determining whether an element in a subpixel of the display panel is defective,
- wherein the defect sensing circuit is further configured to sense at least one of a first driving voltage line supplying a first driving voltage of a high voltage level to the display panel and a second driving voltage line supplying a second driving voltage of a low voltage level to the display panel, the high voltage level being greater than the low voltage level.
A method of controlling a light emitting display device comprising a display panel configured to display an image, a driver configured to drive the display panel, a controller configured to control the driver, and a defect sensing circuit configured to sense a current through a driving voltage line transmitting a driving voltage for driving of the display panel, the method comprising:
- driving at least one first pixel disposed in a first display area of the display panel and at least one second pixel disposed in a second display area of the display panel;
- sensing a driving voltage line connected to the at least one first pixel and a driving voltage line connected to the at least one second pixel;
- and
- determining a failure of an element within the at least one first pixel or the at least one second pixel, based on a first sensing current value sensed through the driving voltage line connected to the at least one first pixel and a second sensing current value sensed through the driving voltage line connected to the at least one second pixel.
A defect sensing device comprising:
- a defect sensing circuit including:
- a first sensing circuit configured to sense a first current flowing through a first portion of a driving voltage line that supplies a driving voltage to a display panel;
- and
- a second sensing circuit configured to sense a second current flowing through a second portion of the driving voltage line,
- wherein the defect sensing circuit is configured to:
- sense a current flowing through at least one of the first portion of the driving voltage line or the second portion of the driving voltage line, and
- output a sensing value based on the current for determining that a defective element exists within a first subpixel connected to the first portion of the driving voltage line or a second subpixel connected to the second portion of the driving voltage line.
Dependencies are inferred from the claim text.