Analog Data Shifter Reduces Display Bandwidth
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Solution Overview
Problem
In display systems, controlling multiple light emitters to produce the same output can lead to high data bandwidth requirements, exceeding the system's capabilities, making it difficult to input data quickly enough for intended operation.
Innovation Solution
Implementing a data shifting circuit that stores and transfers charge between light emitters in synchronization with scanning, using storage elements like capacitors and current mirrors, allowing data to be shifted sequentially and efficiently across emitters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If data is independently generated for each emitter, then each emitter can be controlled precisely, but the data bandwidth requirement becomes excessively high
Solution Approach 1:
The patent merges the data paths for multiple emitters by using a single data line that sequentially serves multiple emitters through time-multiplexed scanning. Instead of providing independent data lines to each emitter, the system combines the data transmission into shared pathways with sequential access, reducing the total data bandwidth requirement while maintaining precise control over each emitter through timed activation.
Solution Approach 2:
The patent implements preliminary action by pre-charging capacitors in the emitter circuitry before the actual scanning and display operation. Data is loaded into the capacitors in advance during a programming phase, allowing the emitters to be activated sequentially during the display phase without requiring continuous high-bandwidth data transmission. This pre-positioning of data reduces real-time bandwidth demands.
2Quantity of substance
If data bandwidth is reduced by controlling emitters sequentially, then bandwidth requirements are met, but data must be input slower than ideal for intended operation
Solution Approach 1:
The patent employs periodic action through rapid scanning cycles where the same data is refreshingly presented to multiple emitters in sequence. The scanning operation cycles through the emitter array repeatedly at high speed, allowing data to be input at a manageable rate while the periodic refresh maintains the illusion of continuous high-speed operation. This temporal repetition compensates for the reduced instantaneous data input rate.
Solution Approach 2:
The patent ensures continuity of useful action by overlapping the programming phase and display phase operations. While one set of emitters is being displayed during the active phase, the next set of data is being programmed into the capacitors in parallel. This continuous pipeline operation ensures that data flows steadily through the system without idle gaps, maintaining effective data input speed despite sequential emitter activation.
3Adaptability or versatility
If multiple emitters are controlled to produce the same output, then display flexibility is improved, but the system complexity increases
Solution Approach 1:
The patent segments the emitter array into multiple columns and rows that can be independently scanned and controlled. Each column can be programmed and displayed independently, allowing flexible configuration of display content across different regions. This segmentation enables the system to handle complex display patterns by breaking them down into manageable columnar units that are processed sequentially through the scanning mechanism.
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
This approach enables efficient data transmission and emitter activation, reducing bandwidth demands and ensuring the display operates as intended by integrating the outputs of different emitters into a single pixel, perceived as a unified unit by the user.
Implementation Method 1
The data can be stored as a charge on a capacitor, where the capacitor is a charged to a particular voltage according to a current from a current mirror
Implementation Method 2
The data shifting circuit can include storage elements for temporary storage of the data as it is shifted down the column. The data can be stored as a charge on a capacitor, where the capacitor is a charged to a particular voltage according to a current from a current mirror
Data Source
AI summary
Techniques are described for operating a display comprising an array of emitters arranged in at least one column. Data is shifted through the emitters of the column using a data shifting circuit. The data can be shifted sequentially, one emitter at a time. The data shifting circuit includes storage elements for temporary storage of the data as it is shifted down the column. The data can be stored as a charge on a capacitor, where the capacitor is charged to a particular voltage according to a current from a current mirror. The shifting can be performed in synchronization with scanning of the emitters by a scanning assembly, where the scanning produces an output image for viewing by a user.