Spatial Light Modulator Sub-Pixel Architecture for Enhanced Bit Depth
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Solution Overview
Problem
Existing digital micromirror device (DMD) display systems are limited by their inability to achieve lower illumination levels and enhanced display bit depth, primarily due to the governance of intensity by timing in pulse-width modulation techniques.
Innovation Solution
The implementation of a semiconductor device with an array of individually controllable image pixels, where each pixel is composed of multiple sub-pixels, allowing for simultaneous loading of data across all sub-pixels from a single data line and independent resetting, enabling fractional pixel bit control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pulse-width modulation techniques are used to control pixel intensity, then display bit depth is limited, but achieving lower illumination levels and enhanced display bit depth is desired
Solution Approach 1:
Each image pixel is divided into multiple sub-pixels (e.g., four sub-pixels per pixel). This segmentation allows independent control of each sub-pixel through separate reset groups, enabling fractional pixel bit control and achieving lower illumination levels and enhanced display bit depth beyond what traditional PWM can provide.
Solution Approach 2:
The patent introduces a new dimension of control by adding independent reset control for each sub-pixel in addition to the traditional data line control. This creates a two-dimensional control structure (data line + reset group) that enables enhanced bit depth control without increasing the fundamental PWM timing complexity.
2Ease of operation
If multiple reset groups are used for sub-pixel control, then manufacturing complexity increases, but ease of manufacture is desired
Solution Approach 1:
Multiple reset groups share common data lines with sub-pixels, allowing the same data line to serve multiple sub-pixels while independent reset groups provide selective control. This multi-functional approach enables flexible sub-pixel control without requiring completely separate addressing infrastructure for each sub-pixel.
Solution Approach 2:
Instead of providing completely independent control lines for each sub-pixel, the patent uses partial independence through shared data lines combined with selective reset control. This reduces manufacturing complexity while still achieving the necessary control flexibility for enhanced bit depth.
Data Source
AI summary
A semiconductor device comprises an array of individually controllable image pixels arranged in a plurality of reset groups. Each of the image pixels in the array of individually controllable image pixels has a one-to-one correspondence with at least one memory cell in an array of memory cells. The semiconductor device further comprises a plurality of sub-pixel sets, wherein each sub-pixel in the plurality of sub-pixel sets is a micromirror, and wherein each of the image pixels comprises a sub-pixel set.