Organic Light Emitting Display Sensing Accuracy via Merged Units
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Solution Overview
Problem
The existing organic light emitting display devices face a challenge in maintaining accurate sensing due to differences in sensing capability between sensing units, leading to variations in luminance across pixels.
Innovation Solution
An organic light emitting display device is designed with a display panel incorporating data lines, scan lines, and sensing lines, along with a sensing data output unit and a source drive integrated circuit (IC) that includes a data voltage supply unit and a switching unit to connect sensing lines to the sensing data output unit in a predetermined order, enhancing sensing accuracy by standardizing current sensing across pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple sensing units are used to sense current in each pixel, then sensing coverage is improved, but sensing accuracy deteriorates due to differences in sensing capability between sensing units
Solution Approach 1:
The patent merges multiple sensing units into a single shared sensing data output unit. Multiple sensing lines from different pixels are connected to one sensing data output unit through switching units, allowing centralized processing of sensing data. This eliminates the inconsistency caused by having multiple separate sensing units with different sensing capabilities, thereby resolving the contradiction between sensing coverage and sensing accuracy.
Solution Approach 2:
The sensing data output unit is designed to handle sensing data from multiple sensing lines universally. The switching unit enables the single sensing data output unit to sequentially connect with different sensing lines, making it a multi-functional component that can sense current from any pixel. This universal design ensures consistent sensing accuracy across all pixels while maintaining comprehensive sensing coverage.
2Reliability
If separate sensing data output units are provided for each sensing line, then sensing capability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple sensing data output units into a single shared unit. Instead of providing separate sensing data output units for each sensing line, the invention uses one sensing data output unit that sequentially processes sensing data from multiple sensing lines through switching units. This merging approach reduces device complexity while maintaining sensing capability through centralized processing.
Solution Approach 2:
The switching unit operates periodically to connect different sensing lines to the shared sensing data output unit in sequence. This periodic switching enables the single sensing data output unit to handle multiple sensing lines over time, achieving the functionality of multiple separate units with a single unit, thereby reducing device complexity while preserving sensing capability.
3Adaptability or versatility
If multiple switching units are used to connect sensing lines to sensing data output unit, then sensing flexibility is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple switching units into a coordinated switching system that controls a single sensing data output unit. The switching units work together to sequentially connect different sensing lines to the shared sensing data output unit, providing sensing flexibility through programmable connectivity while reducing overall device complexity compared to having independent output units for each sensing line.
Data Source
AI summary
An organic light emitting display device is disclosed, which may increase sensing accuracy by solving a problem that a difference between sensing data output from sensing units is generated due to a difference in sensing capability between the sensing units. The organic light emitting display device includes a display panel including data lines, scan lines, sensing lines, and pixels connected to the data lines, the scan lines and the sensing lines; a sensing data output unit outputting first sensing data by sensing currents flowing to the sensing lines; a scan driver supplying scan signals to the scan lines; and a source drive integrated circuit (IC) including a data voltage supply unit supplying data voltages to the data lines and a switching unit connecting the sensing lines to the sensing data output unit in a predetermined order.