Data driver of a microled display
AssigneePrilit Optronics, Inc.
InventorsBiing-Seng Wu, Fa-Ming Chen
Life of this patent
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Abstract
A data driver of a microLED display includes clock generators that generate pulse width modulation (PWM) clocks of corresponding primary colors respectively; counters that receive the PWM clocks of corresponding primary colors respectively and accordingly generate corresponding PWM signals; and comparators associated with corresponding data channels respectively for comparing a held data signal with the corresponding PWM signal, thereby generating a comparison result signal. In one embodiment, the data driver further includes switches configured to electrically short output nodes of channel amplifiers of corresponding primary colors respectively for testing uniformity of microLEDs of one color.
Claims18
A data driver of a microLED display, comprising:
- a plurality of clock generators that generate pulse width modulation (PWM) clocks of corresponding primary colors respectively;
- a plurality of counters that receive the PWM clocks of corresponding primary colors respectively and accordingly generate corresponding PWM signals;
- and
- a plurality of comparators associated with corresponding data channels respectively, each said comparator comparing a held data signal with the corresponding PWM signal, thereby generating a comparison result signal;
- wherein frequencies of the PWM clocks are different.
A data driver of a microLED display, comprising:
- a plurality of clock generators that generate pulse width modulation (PWM) clocks of corresponding primary colors respectively;
- a plurality of counters that receive the PWM clocks of corresponding primary colors respectively and accordingly generate corresponding PWM signals;
- a plurality of comparators associated with corresponding data channels respectively, each said comparator comparing a held data signal with the corresponding PWM signal, thereby generating a comparison result signal;
- and
- a plurality of channel amplifiers associated with data channels respectively, each said channel amplifier being coupled to receive the comparison result signal, thereby generating an amplified signal for driving a microLED display panel;
- wherein the held data signal has data bits less than the display data signal.
Dependencies are inferred from the claim text.