Pixel Capacitive Coupling for Display Correction
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Solution Overview
Problem
High-resolution display devices face challenges with power consumption and delay in image processing due to increased circuit scale and processing demands, particularly in handling high-resolution images and compensating for transistor characteristic variations, which existing correction methods struggle to address effectively.
Innovation Solution
A display device configuration incorporating transistors with metal oxide channels, specifically In, Zn, and M (Al, Ti, Ga, Sn, Y, Zr, La, Ce, Nd, or Hf) for low power consumption and high reliability, utilizing capacitive coupling to add correction data to image data at the pixel level, enabling efficient upconversion and image quality improvement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image correction is performed externally to compensate for transistor characteristic variations, then display quality is improved, but power consumption and processing delay increase due to the large circuit scale required for high-resolution images
Solution Approach 1:
The patent divides the image correction function into two parts: external correction for gross variations and internal correction within each pixel for fine adjustments. This segmentation allows the heavy lifting to be done externally while minimal power-consuming adjustments are made locally at each pixel, resolving the contradiction between comprehensive correction and power consumption.
Solution Approach 2:
The patent performs preliminary correction externally before data is sent to the display device. By pre-processing the image data to compensate for major transistor variations, the amount of correction needed at the pixel level is minimized, thereby reducing power consumption while maintaining display quality.
2Use of energy by moving object
If image correction is performed internally at each pixel, then power consumption is reduced, but correction accuracy is insufficient for high-resolution displays with short horizontal selection periods
Solution Approach 1:
The correction process is segmented into external pre-correction and internal fine-correction. The external correction handles major variations with high accuracy, while the internal correction at each pixel makes minor adjustments. This division allows both low power consumption and sufficient correction accuracy to be achieved.
Solution Approach 2:
By performing preliminary correction externally, the patent reduces the burden on internal pixel correction circuits. The external correction prepares the data in advance, allowing simple internal circuits to achieve adequate correction accuracy without requiring complex, power-hungry processing at each pixel.
3Adaptability or versatility
If external correction is used for high-resolution displays, then correction is feasible, but the load on external devices increases significantly
Solution Approach 1:
The patent segments the correction responsibility between external devices and internal pixel circuits. External devices perform initial correction on the bulk data, while internal circuits handle final adjustments. This segmentation distributes the computational load, making external correction feasible for high-resolution displays without overwhelming external devices.
4Extent of automation
If internal correction is performed frame by frame, then correction can be applied, but insufficient time is available in high-resolution displays with short horizontal selection periods
Solution Approach 1:
The patent performs preliminary correction externally before data is transmitted to the display. This advance preparation eliminates the need for time-consuming correction operations during the short horizontal selection periods of high-resolution displays, allowing frame-by-frame correction to be applied without time constraints.
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 enables efficient image processing and upconversion with reduced power consumption and improved reliability, effectively addressing the challenges of high-resolution image handling and transistor variation compensation in display devices.
Implementation Method 1
a capacitor 105 and a liquid crystal element 106, One electrode of the capacitor 105 is electrically connected to one electrode of the liquid crystal element 106
Data Source
AI summary
A display device capable of performing image processing is provided. A memory node is provided in each pixel included in the display device. An intended correction data is held in the memory node. The correction data is calculated by an external device and written into each pixel. The correction data is added to image data by capacitive coupling, and the resulting data is supplied to a display element. Thus, the display element can display a corrected image. The correction enables image upconversion, for example.