Display devices and methods for making and driving the same
Display devices and methods for making and driving the display devices are provided. In one example, a device for driving a display panel including an array of pixels includes a timing controller. Each of the pixels includes a first light emitting element and a second light emitting element. The timing controller is configured to provide a first set of timing control signals for coordinating timing of gate scanning and timing of writing display data into the array of pixels. The timing controller is further configured to provide a second set of timing control signals for controlling timing of emitting light by the first and second light emitting elements of the array of pixels such that the first light emitting elements emit light in a first light emitting period and the second light emitting elements emit light in a second light emitting period, alternatively.
1. A device for driving a display panel comprising an array of pixels, each of which comprising a first light emitting element and a second light emitting element, the device comprising:
a timing controller configured to:
provide a first set of timing control signals for coordinating timing of gate scanning and timing of writing display data into the array of pixels; and
provide a second set of timing control signals for controlling timing of emitting light by the first and second light emitting elements of the array of pixels such that the first light emitting elements of the array of pixels emit light in a first light emitting period and the second light emitting elements of the array of pixels emit light in a second light emitting period, alternatively; and
a gate driving unit configured to, for each of the pixels, respectively scan the first light emitting element through a first gate line and the second light emitting element through a second gate line different from the first gate line.
2. The device of claim 1 , further comprising:
a data driving unit configured to, for each of the pixels, respectively write, through a same data line, a first piece of display data into the first light emitting element and a second piece of display data into the second light emitting element.
3. The device of claim 2 , wherein in each frame period, the first and second light emitting elements of the array of pixels alternatively emit light after display data has been written into the array of pixels.
4. The device of claim 2 , wherein in each frame period, the timing of emitting light is synchronized with the timing of gate scanning.
5. The device of claim 4 , wherein a frequency of gate scanning is n times of a frequency of emitting light, where n is a positive integer.
6. The device of claim 1 , wherein the first and second light emitting periods are substantially the same.
7. The device of claim 1 , wherein the first and second light emitting elements emit light of different colors.
8. The device of claim 1 , wherein:
the first light emitting element is formed on a substrate and the second light emitting element is formed on the first light emitting element;
the first and second light emitting elements share a same anode;
the first light emitting element comprises a cathode that is part of a first common cathode of the array of pixels; and
the second light emitting element comprises a second cathode that is part of a second common cathode of the array of pixels.
9. The device of claim 8 , wherein the display panel further comprises:
a main switch operatively connected to the first and second common cathodes; and
a plurality of auxiliary switches, each of which being operatively connected to a corresponding shared anode of each of the pixels, the main switch and the plurality of auxiliary switches being controlled by the second set of timing control signals.
10. The device of claim 9 , wherein the timing controller, in providing the second set of timing control signals, is further configured to provide a control signal to the main switch such that the main switch couples to one of the first and second common cathodes to form current paths between the corresponding first or second common cathode and the shared anodes of the array of pixels.
11. The device of claim 10 , wherein the timing controller, in providing the second set of timing control signals, is further configured to provide the control signal to the plurality of auxiliary switches such that, for each of the pixels, the corresponding auxiliary switch couples to one of a first and second driving transistors that corresponds to one of the first and second light emitting elements.