21-07-2012, 01:05 PM
The Grating Light Valve: revolutionizing display Technology
[attachment=28329]
Abstract
The Grating Light Valve™ (GLV™) technology is a micro electromechanical system (MEMS), manufactured by IC fabrication technology.
By controlled diffraction of incident light, We can produce bright or dark pixels in a display system.
With PWM, a GLV device will produce precise gray-scale or color variations.
The GLV device can be made both small and inexpensively.
display systems built using GLV technology benefits the high contrast ratio, fill ratio, and brightness of this technology.
In addition, It provide high resolution, low power consumption, and digital gray-scale & color reproduction.
Fundamental Concept
A GLV device consists of parallel rows of reflective ribbons. Alternate rows of ribbons can be pulled down to create diffraction effects on incident light.
When all the ribbons are in the same plane, incident light is reflected from their surfaces. By blocking light that returns along the same path as the incident light, this state of the ribbons produces a dark spot in a viewing system.
When the alternate movable ribbons are pulled down, however, diffraction produces light at an angle that is different from that of the incident light. Unblocked, this light produces a bright spot in a viewing system.
Building a GLV device
The entire GLV device is designed to be built using mainstream IC fabrication technology to create MEMS
The GLV ribbons are built using silicon nitride, then coated with a very thin layer of aluminium of length 20µm.
Applying the GLV Technology
Video input is format converted then to digital driver.
Light is diffracted by the GLV device into an eye peace for virtual display, or into an optical system for image projection on screen.
[attachment=28329]
Abstract
The Grating Light Valve™ (GLV™) technology is a micro electromechanical system (MEMS), manufactured by IC fabrication technology.
By controlled diffraction of incident light, We can produce bright or dark pixels in a display system.
With PWM, a GLV device will produce precise gray-scale or color variations.
The GLV device can be made both small and inexpensively.
display systems built using GLV technology benefits the high contrast ratio, fill ratio, and brightness of this technology.
In addition, It provide high resolution, low power consumption, and digital gray-scale & color reproduction.
Fundamental Concept
A GLV device consists of parallel rows of reflective ribbons. Alternate rows of ribbons can be pulled down to create diffraction effects on incident light.
When all the ribbons are in the same plane, incident light is reflected from their surfaces. By blocking light that returns along the same path as the incident light, this state of the ribbons produces a dark spot in a viewing system.
When the alternate movable ribbons are pulled down, however, diffraction produces light at an angle that is different from that of the incident light. Unblocked, this light produces a bright spot in a viewing system.
Building a GLV device
The entire GLV device is designed to be built using mainstream IC fabrication technology to create MEMS
The GLV ribbons are built using silicon nitride, then coated with a very thin layer of aluminium of length 20µm.
Applying the GLV Technology
Video input is format converted then to digital driver.
Light is diffracted by the GLV device into an eye peace for virtual display, or into an optical system for image projection on screen.