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  • RGB LED Color Mixing: Using Linear Dimming Technique's with Avago's Color Management Controllers - White paper
    This paper describes RGB LED color mixing control using linear dimming with Avago Technologies' color management controllers, ADJD-J823 and HDJD-J822. The evaluation circuit consists of the LED backlight driver board, the HDJD-JD04 kit, and a small LED backlight screen. The LED driver board has
  • Connecting LEDs: Serial vs. Parallel
    When designing a handheld device with a color display using white LEDs for backlighting, is it better to use parallel or series connected LEDs? Both architectures have their own advantages when you consider the key parameters – efficiency, brightness matching, LED control and physical size
  • Growing Market for LEDs Fuels Need for Advanced Abatement Systems (.pdf)
    of incandescent typically use phosphine gas,. traffi c lights by LEDs is frequently cited as which is poisonous. When. an example of LED effi ciency in an indus- phosphine passes over the wafer,. trial application. Reduced power and mainte- it generates phosphorous, the. ©. i. nance costs have resulted
  • Dimming Power LEDs Using a SEPIC Converter and MCP1631 PIC Attach PWM Controller (.pdf)
    Light. driving the LED with a constant current source to obtain. Emitting Diodes (LEDs). the desired brightness and color. The current source is. The LED technology continues to change and evolve. controlled by a high frequency PWM signal. The PWM. The energy efficiency (lumens/watt) of today's
  • Raw vs. Effective Lumens
    or Incandescent). The main losses are related to 3 items: Thermal Losses, Optical Losses and Assembly variation. Thermal Losses: The greatest challenge is thermal management of LEDs. LED Manufacturers typically measure the light produced by their LEDs after 25 milliseconds (ms). That is equivalent
  • New Technology Offers Better Choices in Spectrophotometers
    a larger specimen area. 10. If possible, always measure standards and batches (of colors to be compared) using the same specimen measuring area as well as the same spectrophotometer, under the same conditions. LEDs: An Alternative Light Source. Another technology reaching the color-analysis market
  • OLED Displays in Industrial Automation Products
    LED’s, typically Red color Seven Segment types. We all remember in the 80’s this was the only way to display, however, when customers’ needs became more complex and demanding we saw the advent of LCD (Liquid Crystal Display). This was immediately followed by the backlit displays as it was at times
  • CO2 balance sheet: aluminum versus alumina ceramics
    There are a number of advantages that result from the production of LED lamps using alumina ceramics as a material for heat sinks, reflectors or mountings. These range from excellent thermal management of the CeramCool system to electrical insulation, aesthetics and haptics. Ceramic can replace

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