DLPS097A August   2017  – February 2023 DLP650NE

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  Storage Conditions
    3. 6.3  ESD Ratings
    4. 6.4  Recommended Operating Conditions
    5. 6.5  Thermal Information
    6. 6.6  Electrical Characteristics
    7. 6.7  Timing Requirements
    8. 6.8  Window Characteristics
    9. 6.9  System Mounting Interface Loads
    10. 6.10 Micromirror Array Physical Characteristics
    11. 6.11 Micromirror Array Optical Characteristics
    12. 6.12 Chipset Component Usage Specification
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power Interface
      2. 7.3.2 Timing
    4. 7.4 Device Functional Modes
    5. 7.5 Optical Interface and System Image Quality Considerations
      1. 7.5.1 Numerical Aperture and Stray Light Control
      2. 7.5.2 Pupil Match
      3. 7.5.3 Illumination Overfill
    6. 7.6 Micromirror Array Temperature Calculation
    7. 7.7 Micromirror Landed-On or Landed-Off Duty Cycle
      1. 7.7.1 Definition of Micromirror Landed-On or Landed-Off Duty Cycle
      2. 7.7.2 Landed Duty Cycle and Useful Life of the DMD
      3. 7.7.3 Landed Duty Cycle and Operational DMD Temperature
      4. 7.7.4 Estimating the Long-Term Average Landed Duty Cycle of a Product or Application
        1.       Application and Implementation
          1. 8.1 Application Information
          2. 8.2 Typical Application
            1. 8.2.1 Design Requirements
            2. 8.2.2 Detailed Design Procedure
  8. 8 Power Supply Requirements
    1. 8.1 DMD Power Supply Requirements
    2. 8.2 DMD Power Supply Power-Up Procedure
    3. 8.3 DMD Power Supply Power-Down Procedure
  9. 9 Device Documentation Support
    1. 9.1 Third-Party Products Disclaimer
    2. 9.2 Device Support
      1. 9.2.1 Device Nomenclature
      2. 9.2.2 Device Markings
    3. 9.3 Documentation Support
      1. 9.3.1 Related Documentation
    4. 9.4 Receiving Notification of Documentation Updates
    5. 9.5 Support Resources
    6. 9.6 Trademarks
    7. 9.7 Electrostatic Discharge Caution
    8. 9.8 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • FYE|350
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.7.4 Estimating the Long-Term Average Landed Duty Cycle of a Product or Application

During a given time period, the Landed Duty Cycle of a given pixel follows from the image content being displayed by that pixel.

For example, in the simplest case, when displaying pure-white on a given pixel for a given time period, that pixel operates under a 100/0 Landed Duty Cycle during that time period. Likewise, when displaying pure-black, the pixel operates under a 0/100 Landed Duty Cycle.

Between the two extremes (ignoring for the moment color and any image processing that may be applied to an incoming image), the Landed Duty Cycle tracks one-to-one with the gray scale value, as shown in #GUID-320A981A-487A-4AC6-AC0A-3621D87A8D65/DLPS036996.

Table 7-1 Grayscale Value and Landed Duty Cycle
GRAYSCALE VALUELANDED DUTY CYCLE
0%0/100
10%10/90
20%20/80
30%30/70
40%40/60
50%50/50
60%60/40
70%70/30
80%80/20
90%90/10
100%100/0

Accounting for color rendition (but still ignoring image processing) requires knowing both the color intensity (from 0% to 100%) for each constituent primary color (red, green, and/or blue) for the given pixel as well as the color cycle time for each primary color, where color cycle time is the total percentage of the frame time that a given primary must be displayed in order to achieve the desired white point.

During a given period of time, the landed duty cycle of a given pixel can be calculated in Equation 1.

Equation 1. Landed Duty Cycle = (Red_Cycle_% × Red_Scale_Value) + (Green_Cycle_% × Green_Scale_Value) + (Blue_Cycle_% × Blue_Scale_Value)

where

  • Red_Cycle_% represents the percentage of the frame time that Red is displayed to achieve the desired white point
  • Green_Cycle_% represents the percentage of the frame time that Green is displayed to achieve the desired white point
  • Blue_Cycle_%, represents the percentage of the frame time that Blue is displayed to achieve the desired white point

For example, assume that the red, green and blue color cycle times are 50%, 20%, and 30% respectively (in order to achieve the desired white point), then the Landed Duty Cycle for various combinations of red, green, blue color intensities would be as shown in #GUID-320A981A-487A-4AC6-AC0A-3621D87A8D65/DLPS0365625.

Table 7-2 Example Landed Duty Cycle for Full-Color
CYCLE PERCENTAGELanded Duty Cycle
Red
50%		Green
20%		Blue
30%
Red Scale ValueGreen Scale ValueBlue Scale Value
0%0%0%0/100
100%0%0%50/50
0%100%0%20/80
0%0%100%30/70
12%0%0%6/94
0%35%0%7/93
0%0%60%18/82
100%100%0%70/30
0%100%100%50/50
100%0%100%80/20
12%35%0%13/87
0%35%60%25/75
12%0%60%24/76
100%100%100%100/0