Display Panel Brightness Non-uniformity Compensation via Block Voltage Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels experience brightness non-uniformity due to voltage drops in power transmission lines, leading to varying brightness across different display units, which existing technologies have not effectively addressed without introducing unwanted side effects.
Innovation Solution
A method and associated display device that adjusts reference voltages based on detected voltage levels across different display blocks, using a selection circuit, voltage generator, and source drivers to drive display voltages uniformly across the panel, ensuring consistent brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If long wires are used to transmit supply voltages to display units far from power supply circuit, then power delivery is achieved, but voltage drops are introduced causing brightness non-uniformity
Solution Approach 1:
The display panel is divided into multiple display blocks (e.g., first display block, second display block) with separate voltage detection terminals for each block. This segmentation allows independent voltage measurement and compensation for each block, enabling localized brightness uniformity correction without requiring complete redesign of the power distribution system.
Solution Approach 2:
The system dynamically adjusts the reference voltage parameter based on detected voltage levels. When voltage drops are detected in distant display blocks, the reference voltage is相应 adjusted to compensate for the drop, maintaining consistent brightness across all display units despite varying distances from the power supply circuit.
2Illumination intensity
If voltage detection and compensation circuitry is added to each display block, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The voltage detection terminal and compensation mechanism are designed as universal components that can be applied to any display block. The same detection and adjustment circuitry is reused across all blocks, reducing overall system complexity compared to implementing custom solutions for each block. The selection circuit universally selects among detection terminals based on which block is currently being driven.
Solution Approach 2:
Each display block contains its own voltage detection terminal that autonomously monitors its local voltage level. The block essentially self-diagnoses its voltage condition and triggers compensation through the shared control circuitry, reducing the need for external monitoring and control complexity.
3Illumination intensity
If reference voltages are adjusted based on detected voltage levels, then brightness non-uniformity is compensated, but manufacturing precision requirements increase
Solution Approach 1:
The system implements a feedback mechanism where voltage detection terminals continuously monitor actual voltage levels at each display block, and the reference voltage adjustment is based on this real-time feedback. This closed-loop approach compensates for manufacturing variations in wire resistance and voltage drops, reducing the need for extremely tight manufacturing precision in the physical components.
Data Source
AI summary
A method for compensating brightness non-uniformity of a display panel, and associated display device is provided. The display panel may include a plurality of display blocks, each of the plurality of display blocks may includes one or more display units, and the method includes: according to a control signal, selecting a voltage detection terminal of a display block within the plurality of display blocks, wherein the control signal carries information indicating the display block; according to a voltage level of the voltage detection terminal, generating a plurality of reference voltages; and based on the plurality of reference voltages, driving a display voltage to a display unit within the display block according to a set of display data.