Display Driving Circuit for Subpixel Sensing Time Control
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Solution Overview
Problem
Existing display devices face issues with luminance deviation among subpixels due to characteristic changes over time, leading to reduced brightness uniformity and image quality, and current compensation methods require lengthy sensing times, reducing operational efficiency.
Innovation Solution
A display device and driving circuit design that reduces sensing time by adjusting the initialization and tracking times of subpixels with different channel sizes, incorporating power and sampling switches to optimize sensing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing driving is performed for each subpixel to compensate luminance deviation, then luminance uniformity is improved, but sensing time becomes excessively long
Solution Approach 1:
The patent divides the sensing operation into two distinct phases: a first sensing operation performed during the initialization period before data signals are applied, and a second sensing operation performed after data signals are applied. This segmentation allows the system to obtain partial sensing data during the initialization phase, reducing the total sensing time required while still achieving accurate luminance compensation.
Solution Approach 2:
The patent performs preliminary sensing operations during the initialization period before the actual data signaling begins. By conducting the first sensing operation in advance during the initialization phase, the system prepares sensing data that can be combined with subsequent sensing data, thereby reducing the overall sensing time required while maintaining compensation accuracy.
2Productivity
If sensing time is reduced by adjusting initialization and tracking times, then operational efficiency is improved, but sensing accuracy may be compromised
Solution Approach 1:
The patent employs a feedback mechanism where sensing data obtained from the first sensing operation during initialization is combined with sensing data from the second sensing operation after data signals are applied. This feedback approach allows the system to maintain high sensing accuracy by utilizing multiple measurement points while reducing overall sensing time through optimized timing sequences.
3Productivity
If subpixels with different channel sizes are sensed simultaneously, then compensation efficiency is improved, but sensing time deviation among subpixels increases
Solution Approach 1:
The patent implements dynamic timing control where the initialization period and tracking period are optimized based on the characteristics of different subpixels. The system dynamically adjusts the timing sequences to account for variations in channel sizes, ensuring that subpixels with different characteristics can be sensed simultaneously without excessive time deviation, thereby maintaining high compensation efficiency.
Data Source
AI summary
The present disclosure provides a display device and a driving circuit. In the display device, a first subpixel is connected to a first data line and a first reference voltage line, and includes an emitting device and a driving transistor; and a second subpixel is connected to a second data line and a second reference voltage line, and includes an emitting device and a driving transistor. The driving time of the first subpixel includes a first initialization time in which a reference voltage is applied to the first reference voltage line and a first tracking time in which a voltage of the first reference voltage line increases from the reference voltage and then is saturated. Sensing times for subpixels having different channel sizes are reduced.