Emission control apparatuses and methods for a display panel
Methods and apparatuses relating to controlling an emission of a display panel. In one embodiment, a display driver hardware circuit includes row selection logic to select a number of rows in an emission group of a display panel, wherein the number of rows is adjustable from a single row to a full panel of the display panel, column selection logic to select a number of columns in the emission group of the display panel, wherein the number of columns is adjustable from a single column to the full panel of the display panel, and emission logic to select a number of pulses per data frame to be displayed, wherein the number of pulses per data frame is adjustable from one to a plurality and a pulse length is adjustable from a continuous duty cycle to a non-continuous duty cycle.
1. A display system comprising:
a display panel including an active area;
an array of microdriver chips mounted in the active area;
an array of micro light emitting diodes (LEDs) mounted in the active area, wherein each microdriver chip is connected to a group of micro LEDs;
wherein each microdriver chip includes:
digital circuitry including a digital memory cell to modulate pulse width of an emission pulse to be sent to a corresponding micro LED;
analog circuitry including an analog current source including storage capacitor to modulate current amplitude of the emission pulse;
a switch;
a first input to the switch from the analog circuitry to provide the current amplitude of the emission pulse;
a second input to the switch from the digital circuitry to control the pulse width of the emission pulse; and
an output from the switch to the micro LED.
2. The display system of claim 1 , wherein the digital memory cell includes a counter, a register, and a comparator.
3. The display system of claim 2 , wherein the register includes a pulse width modulation (PWM) data input.
4. The display system of claim 3 , wherein the counter includes a reset input to reset the counter to zero.
5. The display system of claim 3 , wherein the digital circuitry includes a comparator for each micro LED of the group of micro LEDs.
6. The display system of claim 3 , wherein the comparator includes an input to receive a number of pulses from the counter and an input to receive PWM data from the register.
7. The display system of claim 3 , wherein the analog current source is connected to a power (Vdd) input.
8. The display system of claim 3 , wherein the analog circuitry includes a separate analog current source for each micro LED of the group of micro LEDs.
9. The display system of claim 8 , wherein the group of micro LEDs includes a plurality of pixels, each pixel including a red-emitting micro LED, a blue-emitting micro LED, and a green-emitting micro LED.
10. The display system of claim 9 , wherein each micro LED of the group of micro LEDs has a maximum lateral dimension of 1 to 20 μm.
11. A microdriver chip comprising:
digital circuitry including a digital memory cell to modulate pulse width of an emission pulse to be sent to a corresponding micro LED;
analog circuitry including an analog current source including storage capacitor to modulate current amplitude of the emission pulse;
a switch;
a first input to the switch from the analog circuitry to provide the current amplitude of the emission pulse;
a second input to the switch from the digital circuitry to control the pulse width of the emission pulse; and
an output from the switch to the micro LED.
12. The microdriver chip of claim 11 , wherein the digital memory cell includes a counter, a register, and a comparator.
13. The microdriver chip of claim 12 , wherein the register includes a pulse width modulation (PWM) data input.
14. The microdriver chip of claim 13 , wherein the counter includes a reset input to reset the counter to zero.
15. The microdriver chip of claim 13 , wherein the digital circuitry includes a plurality of comparators connected with a corresponding plurality of analog current sources.
16. The microdriver chip of claim 13 , wherein the comparator includes an input to receive a number of pulses from the counter and an input to receive PWM data from the register.
17. The microdriver chip of claim 13 , wherein the analog circuitry includes a plurality of analog current sources to drive a corresponding plurality of micro LEDs.