Lars A. Yoder

Bio: Lars A. Yoder is an academic researcher from Texas Instruments. The author has contributed to research in topics: Display device & Digital micromirror device. The author has an hindex of 6, co-authored 8 publications receiving 256 citations.

Display system architectures for digital micromirror device (DMD)-based projectors

Abstract: The Digital Micromirror Device (DMDTM) developed by Texas Instruments is a highly useful Micro-Opto-Electro-Mechanical Structures (MOEMS) device that enables high quality projection display. Acting as a semiconductor light switch, the DMD can modulate incident light to produce truly digital projection display systems. Illumination and projection optics are described for three fundamental display system architectures based on the DMD light modulator. These systems include one, two, and three DMD configurations all producing full color image projection. The single device configuration implemented with a rotating color filter system represents the least system hardware while providing the capability of full color and a high brightness monochromatic mode. A two device configuration using a rotating color filter combined with a secondary color splitting filter is of particular interest when using a light source that is spectrally imbalanced. The two device configuration is also capable of a high brightness monochromatic mode of operation. The three device configuration is the most efficient with respect to light throughput considerations providing the highest brightness full color projection with the DMD light modulators. Comparisons of system performance characteristics are described indicating the features of each configuration.

DLP technolgy: applications in optical networking

Abstract: For the past five years, Digital Light Processing (DLP) technology from Texas Instruments has made significant inroads in the projection display market. With products encompassing the world's smallest data & video projectors, HDTVs, and digital cinema, DLP is an extremely flexible technology. At the heart of these display solutions is Texas Instruments Digital Micromirror Device (DMD), a semiconductor-based light switch array of thousands of individually addressable, tiltable, mirror-pixels. With success of the DMD as a spatial light modulator in the visible regime, the use of DLP technology under the constraints of coherent, infrared light for optical networking applications is being explored. As a coherent light modulator, the DMD device can be used in Dense Wavelength Division Multiplexed (DWDM) optical networks to dynamically manipulate and shape optical signals. This paper will present the fundamentals of using DLP with coherent wavefronts, discuss inherent advantages of the technology, and present several applications for DLP in dynamic optical networks.

Combination overhead projector and electronic display device

Abstract: A projection display that combines both overhead projector and electronic display functionality in a single projector. This invention provides a single comprehensive solution, which addresses both overhead projection display needs, as well as electronic projection display needs and further provides a new function that allows superimposed images from the two functions to be captured and stored for future projection through the electronic display function.

Wireless data transport of internet content to display device

Abstract: A display device ( 10 ) for wirelessly receiving internet content, in the form of HTML commands ( 12 ), as well as commands for controlling operation of the display device ( 10 ). The display device ( 10 ) has an embedded processor ( 22 ), programmed with a browser to interpret the HTML commands, and additional programming for generating pixel data based on the HTML commands and associated data files. A display engine ( 26 ) receives the pixel data and generates displays.

Lab-on-chip technologies: making a microfluidic network and coupling it into a complete microsystem : a review

Abstract: Microfluidics is an emerging field that has given rise to a large number of scientific and technological developments over the last few years. This review reports on the use of various materials, such as silicon, glass and polymers, and their related technologies for the manufacturing of simple microchannels and complex systems. It also presents the main application fields concerned with the different technologies and the most significant results reported by academic and industrial teams. Finally, it demonstrates the advantage of developing approaches for associating polymer technologies for manufacturing of fluidic elements with integration of active or sensitive elements, particularly silicon devices.

Emerging digital micromirror device (DMD) applications

Abstract: For the past six years, Digital Light Processing technology from Texas Instruments has made significant inroads in the projection display market. With products enabling the world’s smallest data and video projectors, HDTVs, and digital cinema, DLP technology is extremely powerful and flexible. At the heart of these display solutions is Texas Instruments Digital Micromirror Device (DMD), a semiconductor-based “light switch” array of thousands of individually addressable, tiltable, mirror-pixels. With success of the DMD as a spatial light modulator for projector applications, dozens of new applications are now being enabled by general-use DMD products that are recently available to developers. The same light switching speed and “on-off” (contrast) ratio that have resulted in superior projector performance, along with the capability of operation outside the visible spectrum, make the DMD very attractive for many applications, including volumetric display, holographic data storage, lithography, scientific instrumentation, and medical imaging. This paper presents an overview of past and future DMD performance in the context of new DMD applications, cites several examples of emerging products, and describes the DMD components and tools now available to developers.

Testing apparatus using charged particles and device manufacturing method using the testing apparatus

Abstract: A substrate is irradiated by primary electrons and secondary electrons generated from the substrate are detected by a detector. A reference die is placed on the stage to obtain a pattern matching template image including feature coordinates of the reference die. A pattern matching is performed with an arbitrary die in a row or column including the reference die using the template image to obtain feature coordinates of the arbitrary die. An angle of misalignment is calculated between the direction of the row or column including the reference die and one of the directions of movement of the substrate on the basis of the feature coordinates of the arbitrary die and those of the reference die. The stage is rotated to correct the angle of misalignment to conform the direction of the row or column including the reference die with the one of the directions of movement of the substrate.

Digital Light Processing for high-brightness, high-resolution applications

Abstract: Electronic projection display technology for high-brightness applications had its origins in the Gretag Eidophor, an oil film-based projection system developed in the early 1940s. A number of solid state technologies have challenged the Eidophor, including CRT-addressed LCD light valves and active-matrix-addressed LCD panels. More recently, in response to various limitations of the LCD technologies, high-brightness systems have been developed based on Digital Light Processing technology. At the heart of the DLP projection display is the Digital Micromirror Device, a semiconductor-based array of fast, reflective digital light switches that precisely control a light source using a binary pulsewidth modulation technique. This paper describes the design, operation, performance, and advantages of DLP- based projection systems for high-brightness, high- resolution applications. It also presents the current status of high-brightness products that will soon be on the market.