Timing Controller Voltage Stabilization for Display Brightness Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The uneven display brightness caused by backlight affects the quality of display panels, leading to a water ripple phenomenon during the retention period of liquid crystals.
Innovation Solution
A display device comprising a display panel, a backlight module, and a timing controller, where the timing controller controls the pixel electrodes to have equal or approximately equal first and second voltages when the backlight is turned on or off, using a grayscale mapping table and default grayscale array to stabilize the voltage difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the backlight light source is turned on, then the display panel can be illuminated, but electron mobility of the semiconductor element changes causing uneven display brightness
Solution Approach 1:
The timing controller pre-adjusts the voltage applied to pixel electrodes based on the backlight state before actual display occurs. When backlight is about to turn on, the controller proactively modifies pixel electrode voltages to compensate for upcoming electron mobility changes, preventing uneven brightness before it happens
Solution Approach 2:
The patent changes the voltage parameter applied to pixel electrodes depending on backlight state. First voltage is applied when backlight is on, and second voltage (equal to or approximately equal to first voltage) is applied when backlight is off, compensating for light-induced electron mobility changes in the semiconductor elements
2Ease of operation
If different voltages are applied to pixel electrodes during backlight on/off states, then charging effect of sub-pixels changes, but water ripple phenomenon occurs during liquid crystal retention period
Solution Approach 1:
The timing controller pre-adjusts pixel electrode voltages in response to backlight state changes before liquid crystal retention occurs. By proactively setting appropriate voltages during backlight transitions, the system prevents water ripple phenomenon from developing during the retention period
Solution Approach 2:
The patent applies compensatory voltage adjustments to counteract the harmful effects of backlight-induced electron mobility changes. By applying opposite or compensating actions (voltage adjustments) before uneven brightness and water ripple effects manifest, the system prevents display quality degradation
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
The solution prevents voltage fluctuations in pixel electrodes, stabilizes the voltage difference between pixel and common electrodes, improves brightness uniformity, and prevents the water ripple phenomenon.
Implementation Method 1
a backlight module including a backlight light source for the display panel
Implementation Method 2
each sub-pixel includes a pixel electrode... controls the pixel electrode to have a first voltage... and second voltage
Data Source
AI summary
A display device and an electronic equipment are provided. The display device includes a display panel, a backlight module, and a timing controller. By configuring pixel electrodes to have equal or approximately equal first voltages and second voltages when the backlight source is turned on or turned off, the voltages of the pixel electrodes can be prevented from being affected by the backlight. This further stabilizes a voltage difference between the pixel electrodes and the common electrode and improves brightness uniformity of the display panel.