MEMS Display Control via Time Interval Modulation
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Solution Overview
Problem
Display apparatuses using micro-electro-mechanical systems (MEMS) face challenges in effectively controlling transmittance for gray scale representation due to the difficulty in adjusting voltage levels, which affects the display of accurate gray scales.
Innovation Solution
The implementation of a display apparatus with a micro-electro-mechanical system that includes a switching device, a micro-electro-mechanical system, and a control device, where the control device manages the time interval of data signal application to the micro-electro-mechanical system, allowing for controlled transmittance by adjusting the gray scale voltage during specific time intervals rather than voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If voltage levels are adjusted to control transmittance in MEMS display apparatus, then transmittance control is attempted, but accurate gray scale representation cannot be achieved due to difficulty in adjusting voltage levels
Solution Approach 1:
The patent changes the control parameter from voltage level to time interval duration. Instead of adjusting the voltage magnitude applied to the MEMS device, the invention controls the length of time the data signal is applied, thereby achieving gray scale control through temporal parameters rather than electrical magnitude parameters.
Solution Approach 2:
The invention employs periodic pulsed signals where the data signal is applied in discrete time intervals. By controlling the duration of these periodic pulses rather than their amplitude, the system achieves precise gray scale representation through time-based modulation of the MEMS device state.
2Measurement precision
If voltage levels are difficult to adjust in MEMS display apparatus, then transmittance control precision deteriorates, but the patent introduces a control device to manage time intervals
Solution Approach 1:
The control device acts as an intermediary between the data driver and the MEMS device. It receives the data signal and controls the time interval of its application to the MEMS device, thereby mediating the control process and enabling precise transmittance control without requiring complex voltage level adjustments at the MEMS interface.
3Manufacturing precision
If time interval control is implemented instead of voltage level adjustment, then gray scale accuracy is improved, but the control mechanism becomes more complex
Solution Approach 1:
The control device utilizes the inherent characteristics of the MEMS device and the data signal timing to achieve gray scale control. By controlling when the data signal is applied rather than how strongly, the system leverages the natural response characteristics of the MEMS device, reducing the need for additional complex control circuitry while achieving improved gray scale accuracy.
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 precise control over transmittance, allowing for accurate gray scale representation by extending or shortening the time interval during which the micro-electro-mechanical system transmits light, thereby improving the display of various gray scales.
Implementation Method 1
a micro-electro-mechanical system coupled to an output electrode of the switching device to control output of a light signal in response to the corresponding data signal
Data Source
AI summary
A display apparatus includes a plurality of gate lines, a plurality of data lines, and a plurality of pixels. Each pixel of the plurality of pixels comprises a switching device coupled to a corresponding gate line of the plurality of gate lines and to a corresponding data line of the plurality of data lines, a micro-electro-mechanical system coupled to an output electrode of the switching device, and a control device coupled to the output electrode of the switching device. The control device comprises a storage capacitor coupled to the output electrode of the switching device and a coupling capacitor coupled to the output electrode of the switching device, the storage capacitor connected in parallel with the coupling capacitor. The output electrode of the switching device, the storage capacitor, the coupling capacitor, and a first electrode of the micro-electro-mechanical system are all directly connected to each other.