NewsThe latest news from Lumita.
May 10, 2011
Los Angeles, CA - The Society for Information Display has awarded the Paper “Achieving High Color Reproduction Accuracy in LCDs for Color-Critical Applications” it’s Distinguished Paper Award. Karl Lang of Lumita is a co-author of the paper and worked on the research methods and black point compensation model introduced at the conference.
The National Institute of Standards and Technology has released NISTIR 6657 - Detailing the Measurment of Color Light Output.
Jan. 20, 2009Boulder, CO – The National Institute of Standards and Technology today released NISTIR 6657.This document details the recommended laboratory procedures for the collection of Projector Color Light Output. NIST also reports on experiments that show the same dramatic differences in projector color Gamut that Lumita has demonstrated in current business projectors.ABSTRACT: A standard methodology exists for estimating the flux from front projection displays by sampling the projected illuminance of a white source signal. With the advent and use of white projection primaries, a dramatic increase in flux can be achieved over the combination of red, green, and blue primaries alone. However, when a white primary is used saturated-color areas in an image are constrained to low flux levels relative to the display maximum and further undergo a perceptual compression in relative lightness. As a result, bright saturated colors cannot be rendered accurately and the appearance of full-color imagery is distorted. The display of color-accurate imagery does not generally use the white primary due to these problems, and thus there is a need for providing an equivalent flux measurement that will better describe the performance of all projectors when rendering full-color imagery. Background research and a method utilizing the source-signal color primaries are described.
June 20, 2008Las Vegas, NV – Lumita (www.lumita.com) in conjunction with 3LCD and partners demonstrated the efficacy of the new proposed Color Light Output metric in live demonstrations to press and analysts. Using real world examples in side by side demonstrations Lumita showed how current market leading projectors that are rated by their manufacturers at similar IEC White Light Output can have drastically different color performance. Lumita further demonstrated how the new Color Light Output metric will help consumers to predict projector color performance before purchase. Multiple manufacturers have now agreed in principle to include the Color Light Output Metric on packaging and in product brochures. Tim Anderson of 3LCD presented the Color Light Output metric to attendees at the InfoComm Projection Summit. Karl Lang of Lumita presented research and a technical analysis of Color Light Output to members at the Sony AV consultants breakfast, where it was very well received.
Jan. 7, 2008
Lumita and leading projector manufacturers have partnered to introduce a new Color Light Output metric for the specification of digital projectors. Lumita has integrated the new metric into a draft update of the internation standard IEC 61947-1. Lumita has also tested the new metric and published the results at the 15th Color Imaging Conference, Albuquerque, NM.
Los Angeles, CA – January 7, 2008- Today, leading projector manufacturers and technology experts endorsed a new projector measurement standard developed to help users evaluate a projectors color performance. The new specification, called Color Brightness measures color light output. Given the fast-paced development of vivid color content and the rapid adoption high definition video presentations. The quality and impact of the color produced by a projector has become extremely important. The Color Brightness metric will allow end-users to assure their huge investment in content is delivered with the most impact and the greatest effect.
In the classroom or boardroom, color has a resounding influence on communication - enhancing attention, comprehension and impact. Current industry specification metrics fail to highlight the differences in color light output among competing products and technologies – leaving it virtually unreported. Despite the overwhelming use of color today, the industry has continued to rely largely on specifications that only measure black and white performance, such as Brightness and Contrast Ratio. So where do users go when it comes to evaluating the color performance of competing products? It is time for a new projector measurement metric – Color Brightness.
Based on the existing industry-standard test method, Color Brightness, like the current light output measure, is reported in lumens. Color Brightness specifies a projector’s ability to deliver the primary colors of light. Today all video, DVD, HD, digital camera and computer signals are encoded in an RGB color space. Color Brightness measures the brightness of red, green and blue, just like the input signal. If a projector can produce bright red, green and blue equal too the brightness of white, it can reproduce true color the way it was intended. If the Color Brightness does not equal the White Brightness color images will appear dark, washed out and less accurate.
Example Projector with Good color performance:
Light Output specification:
• White 1800 lumens
• Color 1800 lumens
Example Projector with Poor color performance:
Light Output specification:
• White 1800 lumens
• Color 900 lumens
“Without this new metric, consumers are in the dark about color performance,” commented Karl Lang, president of Lumita. “Two projectors that both advertise 2,000 (white) lumens can have vastly different color performance. Color brightness provides the information consumers have needed for a long time,” continued Lang.
Working with color engineers and industry experts, supporters over the coming months will publish test methods, and studies exemplifying the metrics’ utility and effectiveness. The new test method will be submitted to major international standards bodies for acceptance.
Nov. 6, 2007
Karl Lang, presented a Lumita research paper at the 15th Color Imaging Conference in Albuquerque,NM. The paper titled “Analysis of the proposed IEC “Color Illuminance” digital projector specification metric, using CIELAB gamut volume” demonstrates the utility of the new Color Light Output projector metric. Like the existing light output metric the new metric is measured in Lumens and provides a simple easy to understand number that consumers can use to evaluate projectors when making purchasing decisions. This new research tested a number of popular projectors using the new metric and compared the result with the much more rigorous CIELAB gamut volume test. The study shows the consumer friendly “Color Brightness” number is a good indicator of projector color performance.