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US 10,504,405 B2Granted
Display device including reference voltage supply
AssigneeLG Display Co., Ltd.
InventorsHanjin Bae, Sangho Yu
Life of this patent
Estimating the term…
Abstract
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.
Claims20
A display device, comprising:
- a display panel including data lines, first and second panel lines, scan lines, and pixels;
- a power circuit configured to output first and second DC reference voltages initializing subpixels of the pixels;
- a plurality of branch lines configured to divide a path of the first and second DC reference voltages into a plurality of paths;
- and
- a switch circuit configured to switch a path between the branch lines and the panel lines,
- wherein the switch circuit changes the path between the branch lines and the panel lines at a predetermined time interval,
- wherein each of the subpixels includes:
- an organic light emitting diode (OLED), and
- a driving transistor configured to control a current flowing in an OLED depending on data of an input image,
- wherein the first and second DC reference voltages are respectively applied to first and second subpixels through the first and second panel lines at the predetermined time interval where the first and second subpixels are alternately arranged at least every one sub-pixel in at least one of a horizontal direction and a vertical direction of the display panel, and
- wherein a node between the driving transistor and the OLED in the first and second subpixels is respectively initialized to the first and second DC reference voltages at the predetermined time interval.
8 more elements
A display device, comprising:
- a display panel including data lines, first and second panel lines, scan lines, and pixels;
- a first power circuit having a first line and configured to supply a first DC reference voltage to subpixels of the pixels through the first line;
- a second power circuit having a second line and configured to supply a second DC reference voltage to the subpixels of the pixels through the second line;
- a plurality of first branch lines configured to divide a first path of the first DC reference voltage into a plurality of paths;
- a plurality of second branch lines configured to divide a second path of the second DC reference voltage into a plurality of paths;
- a first switch circuit configured to switch a path between the plurality of first branch lines and the panel lines;
- and
- a second switch circuit configured to switch a path between the plurality of second branch lines and the panel lines,
- wherein each of the first and second switch circuits changes the path between the branch line and the panel lines at a predetermined time interval
- wherein each of the subpixels includes:
- an organic light emitting diode (OLED), and
- a driving transistor configured to control a current flowing in an OLED depending on data of an input image,
- wherein the first and second DC reference voltages are respectively applied to first and second subpixels through the first and second panel lines at the predetermined time interval where the first and second subpixels are alternately arranged every one dot in at least one of a horizontal direction and a vertical direction, and
- wherein a node between the driving transistor and the OLED in the first and second subpixels is respectively initialized to the first and second DC reference voltages at the predetermined time interval.
11 more elements
Dependencies are inferred from the claim text.