Shared Pixel Block Circuits for High-Resolution Display Driving
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Solution Overview
Problem
Current display devices face challenges in achieving high image quality, supplying sufficient voltage to display elements, increasing frame frequency, and enhancing luminance while maintaining low power consumption and a high aperture ratio, particularly with the increasing number of pixels and resolution demands.
Innovation Solution
A display device design incorporating multiple pixel blocks with specific transistor and capacitor configurations, including metal oxide transistors, to generate higher voltages, improve luminance, and increase frame frequency, while reducing power consumption and increasing the aperture ratio by optimizing the layout and operation of pixel circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels is increased to achieve higher resolution, then the image quality is improved, but the horizontal period is shortened making it difficult to increase frame frequency
Solution Approach 1:
The pixel circuit is divided into two separate circuits: a first circuit for adding first data and second data to generate third data, and a second circuit for retaining the third data and performing display. This segmentation allows the first circuit to complete data processing operations independently, enabling higher frame frequencies even with increased pixel counts.
2Illumination intensity
If the output voltage of the source driver is increased to supply higher voltage to the display element, then the luminance is enhanced, but the power consumption increases
Solution Approach 1:
The voltage generation is segmented between the source driver and the first circuit in each pixel block. The source driver outputs a base voltage, and the first circuit generates additional voltage by adding data potentials. This allows high luminance to be achieved without requiring the source driver to output high voltages, thereby reducing power consumption.
Solution Approach 2:
The first circuit acts as an intermediary voltage generation stage between the source driver and the display element. It takes the base voltage from the source driver and adds data potentials to generate the final high voltage needed for high luminance display, avoiding the need for high power consumption in the source driver.
3Measurement precision
If the constituent elements of the pixel circuit are increased to achieve clear gradation display, then the image quality is improved, but the aperture ratio decreases
Solution Approach 1:
Multiple pixel blocks share a common first circuit for adding data potentials. By merging the data processing function at the pixel block level rather than requiring separate circuits in each pixel, the invention reduces the number of components per pixel while maintaining the capability for clear gradation display through the addition of multiple data potentials.
Data Source
AI summary
A display device capable of improving image quality is provided. A display device includes a plurality of pixel blocks in a display region. The pixel blocks each include a first circuit and a plurality of second circuits. The first circuit has a function of adding a plurality of pieces of data supplied from a source driver. The second circuit includes a display element and has a function of performing display in accordance with the added data. One pixel has a configuration including one second circuit and an component of the first circuit that is shared. When the first circuit is shared by a plurality of pixels, the aperture ratio can be increased.