Data Driver Upscaling FHD to UHD via Resolution Control Circuit
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Solution Overview
Problem
Display devices with ultra-high definition (UHD) resolution require additional circuits to convert full high definition (FHD) image signals, increasing manufacturing costs.
Innovation Solution
A display apparatus with a data driver that includes a resolution control circuit and a latch part, which applies image data to pixels connected to odd-numbered and even-numbered data lines differently based on a resolution control signal, allowing for up-scaling of FHD image signals to UHD without a separate up-scaler, using techniques like nearest-neighbor, bi-linear, or cubic interpolation methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate up-scaler circuit is added to convert FHD image signals to UHD resolution, then the image conversion capability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges the up-scaling function into the existing data driver circuit by adding a resolution control circuit and latch part that can operate in different modes. The data driver is modified to accept a resolution control signal that determines whether to output image data normally or to perform up-scaling by applying the same data to adjacent even-numbered data lines, thereby eliminating the need for a separate up-scaler circuit.
Solution Approach 2:
The data driver is designed with multi-functionality to handle both normal FHD display mode and UHD up-scaling mode. By incorporating a resolution control circuit that responds to control signals, the same hardware circuit can adapt its operation based on the required display resolution, allowing one circuit to serve multiple purposes without requiring dedicated separate circuits for each function.
2Adaptability or versatility
If a separate up-scaler circuit is added to convert FHD image signals to UHD resolution, then the image conversion capability is improved, but the device complexity increases
Solution Approach 1:
The patent merges the up-scaling function into the existing data driver circuit by adding a resolution control circuit and latch part that can operate in different modes. The data driver is modified to accept a resolution control signal that determines whether to output image data normally or to perform up-scaling by applying the same data to adjacent even-numbered data lines, thereby eliminating the need for a separate up-scaler circuit.
3Manufacturing precision
If image data is applied to even-numbered data lines using interpolation methods, then image quality is improved, but the processing complexity increases
Solution Approach 1:
The patent applies different data application strategies to different regions of the display. For even-numbered data lines, the resolution control circuit determines whether to apply interpolated data (improving image quality at the cost of additional processing) or to apply the same data as odd-numbered lines (simpler processing). This local adaptation allows the system to optimize image quality where needed while maintaining simplicity elsewhere.
Data Source
AI summary
A display apparatus includes pixels, gate lines and data lines, a gate driver driving the gate lines, a data driver driving the data lines, and a timing controller controlling the gate and data drivers and applying a resolution control signal to the data driver. The data driver applies a first line data signal to the pixels connected to a first gate line of the gate lines from image data and a second line data signal to a second gate line of the gate lines based on the first line data signal in response to a shift start pulse signal when the resolution control signal indicates an up-scaling mode.