Emission Selection Gate Driver for Complete Pulse Masking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face issues with power consumption and masking operation malfunctions when driving frequencies are reduced, particularly in still image display or Always-On Display modes, leading to incomplete masking of pulses in frame periods.
Innovation Solution
An emission selection driver and gate driver system that generates synchronized selection and emission signals with equal pulse lengths and timings, ensuring complete masking of gate signals and preventing erroneous operations during multi-frequency driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the driving frequency of the display panel is reduced to lower power consumption, then power consumption is reduced, but masking operation malfunctions occur due to incomplete masking of pulses in frame periods
Solution Approach 1:
The selection signal is generated in advance based on the next emission signal before the current emission signal is applied to the pixel. This preliminary generation ensures that the masking operation is properly synchronized with the emission signal timing, preventing masking malfunctions even when operating at reduced frequencies for power savings.
Solution Approach 2:
The selection driver receives feedback from the emission driver about the timing and duration of emission signals. This feedback mechanism allows the selection signal to be dynamically adjusted to match the actual emission signal characteristics, ensuring complete masking of gate signals regardless of frequency variations during MFD operation.
2Use of energy by stationary object
If a global scan signal is used to mask gate signals in MFD mode, then power consumption is reduced by driving at low frequency, but only part of the pulses are masked causing masking operation malfunction
Solution Approach 1:
The selection signal is generated in advance based on the next emission signal before the current emission signal is applied to the pixel. This preliminary generation ensures that the masking operation is properly synchronized with the emission signal timing, preventing masking malfunctions even when operating at reduced frequencies for power savings.
Solution Approach 2:
The selection signal parameters (duration and timing) are dynamically changed to match the emission signal parameters. By adjusting the selection signal duration to be equal to the emission signal duration and aligning their timings, the masking operation correctly covers the entire emission period regardless of frequency variations during MFD operation.
3Use of energy by moving object
If the emission signal duration is extended for low frequency driving, then power consumption is reduced, but the masking signal may not cover the entire emission period causing incomplete masking
Solution Approach 1:
The selection signal parameters (duration and timing) are dynamically changed to match the emission signal parameters. By adjusting the selection signal duration to be equal to the emission signal duration and aligning their timings, the masking operation correctly covers the entire emission period regardless of frequency variations during MFD operation.
Solution Approach 2:
The selection driver receives feedback from the emission driver about the timing and duration of emission signals. This feedback mechanism allows the selection signal to be dynamically adjusted to match the actual emission signal characteristics, ensuring complete masking of gate signals regardless of frequency variations during MFD operation.
Data Source
AI summary
An emission selection driver includes an emission driver configured to output an emission signal from an emission output node, and a selection driver connected to the emission output node and configured to output a selection signal based on a next emission signal and an enable signal.