Adder Circuit Voltage Generation for Display Luminance
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Solution Overview
Problem
High-resolution display apparatuses require higher voltage outputs, leading to increased power consumption and the need for new driver ICs, while existing source drivers struggle to supply sufficient voltage efficiently, affecting image quality and aperture ratio.
Innovation Solution
A display apparatus with an adder circuit that generates higher voltage by adding data supplied from a source driver, using transistors with metal oxide channels, particularly In, Zn, and M (Al, Ti, Ga, Sn, Y, Zr, La, Ce, Nd, or Hf) for improved performance and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If higher voltage output is supplied to achieve high-resolution display and HDR, then image quality and luminance are improved, but power consumption increases and new driver ICs are required
Solution Approach 1:
The voltage generation function is segmented from the source driver and implemented within the pixel circuit itself through the adder circuit. This allows each pixel to generate its own high voltage locally, eliminating the need for a high-output source driver and reducing overall power consumption while maintaining high luminance performance.
Solution Approach 2:
The patent introduces a new functional dimension within the pixel circuit by adding an adder circuit that performs voltage addition. This transforms the pixel from a simple display element to an active voltage generation unit, enabling high voltage output without increasing source driver power consumption.
2Power
If higher voltage output is supplied to achieve high-resolution display, then voltage requirement is met, but device complexity increases due to new driver IC requirements
Solution Approach 1:
The voltage addition function is merged into the existing pixel circuit structure through the adder circuit. This integration eliminates the need for separate high-voltage driver ICs, maintaining simple device architecture while achieving the required output voltage for high-resolution displays.
3Illumination intensity
If aperture ratio is increased to improve display quality, then image quality improves, but circuit area for voltage generation must be reduced
Solution Approach 1:
The adder circuit uses dynamic switching of capacitor connections to achieve voltage addition. By dynamically controlling the switching timing and sequence, the circuit achieves high voltage output using minimal component area, allowing larger aperture ratios while maintaining voltage generation capability.
Data Source
AI summary
A display apparatus capable of improving image quality is provided. In the display apparatus, an adder circuit is provided inside and outside a display region, and the adder circuit has a function of adding a plurality of pieces of data supplied from a source driver. Some components of the adder circuit are separately arranged in a pixel region. Thus, limitation on the size of a component included in the adder circuit can be eased, and data addition can be performed efficiently. In addition, by providing the other components included in the adder circuit outside the display region, the number of wirings in the display region can be reduced and the aperture ratio of the pixel can be increased.