Touch Display Firmware Tuning for Flicker Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with integrated touch sensing modules experience flicker noise due to interference between display and touch driving frequencies and voltage differences, leading to reduced image quality.
Innovation Solution
The display device adjusts its display control and touch driving firmware based on a comparison of flicker noise detection values with reference values, optimizing frequencies and voltages to minimize interference and reduce flicker noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch sensing module is integrated into display device, then device functionality is improved, but flicker noise increases due to interference between display and touch driving frequencies
Solution Approach 1:
The patent measures flicker noise while varying display driving frequency, touch driving frequency, and voltage values, then identifies optimal parameter combinations that minimize flicker noise. This involves changing multiple parameters simultaneously to find the best configuration for integrated display and touch operation
Solution Approach 2:
The patent implements a feedback mechanism where flicker noise is measured during manufacturing, and firmware is adjusted based on the measured values. The display and touch driving frequencies and voltages are tuned iteratively until flicker noise falls within acceptable ranges, creating a closed-loop optimization process
2Productivity
If display driving frequency and voltage values are increased, then display performance is improved, but flicker noise increases due to interference with touch driving signals
Solution Approach 1:
The patent systematically varies display driving frequency and voltage values while measuring resulting flicker noise levels. By testing different parameter combinations, it identifies optimal settings that maintain high display performance while minimizing interference with touch driving signals
Solution Approach 2:
The patent makes the display and touch driving parameters dynamic and adjustable rather than fixed. Firmware is configured with可调 parameters for frequency and voltage that can be optimized based on measured flicker noise, allowing the system to adapt to different operating conditions
3Measurement precision
If touch driving frequency and voltage values are increased, then touch sensing performance is improved, but flicker noise increases due to interference with display signals
Solution Approach 1:
The patent measures flicker noise while varying touch driving frequency and voltage values to identify optimal settings. By testing different touch driving parameters in combination with display parameters, it finds configurations that enhance touch sensing capability while minimizing flicker interference
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances image display quality by reducing flicker noise and improving the overall performance of the display device.
Implementation Method 1
the flicker noise detection value is computed from a luminance difference value measured through a photometer
Data Source
AI summary
A display device includes a display panel which includes a display area including a plurality of pixels; a touch sensing unit disposed on a front surface of the display panel; a display driving circuit, configured to drive the pixels of the display area based on display control firmware; and a touch driving circuit configured to drive touch electrodes of the touch sensing unit based on touch driving firmware, and further configured to generate touch coordinate data, wherein the display control firmware and the touch driving firmware are initialized or changed according to a comparison result between a flicker noise detection value of the display area and a reference flicker noise detection value, wherein the flicker noise detection value is determined by measuring a change in luminance over time of a flicker detection pattern displayed in the display area.