Countermanding Orders
- 1. Introduction
- 2. The Test Bed
- 3. Color Rendering Tests
- 4. Color Rendering Tests, Continued
- 5. Latency Measures; Introducing The Test System
- 6. Working Principles
- 7. The Mechanism
- 8. The Driving Software
- 9. First Observation: Refresh Delay
- 10. Third Observation: Fade Time
- 11. What About The Standards?
- 12. Example Of Use: Viewsonic VP191b, VA + Overdrive
- 13. Overdrive, How Does It Work? Continued
- 14. Perfectionism Can Be Counterproductive
- 15. Countermanding Orders
- 16. Contrast And Uniformity
- 17. Contrast And Uniformity, Continued
- 18. The Practical Tests
- 19. Horses For Courses?
- 20. Design And Finish
- 21. Conclusion
15. Countermanding Orders
After having studied the way in which overdrive is being exploited, the establishment of a new measure evaluating the quality of the overdrive appears to us to be an absolute necessity. We're going to be able to assess, therefore, whether the response of the pixel is excessive in the way it overshoots the color we've effectively asked for.

In this example, for instance, the overshoot is of the order of two images.
For screens with overdrive, we will point out, from now on, the worst case we encounter in the course of our latency measurements; i.e. by reference to the number of images we have to tolerate above 110% of the value required before we obtain what we want. For more clarity, we will match this measurement to a color code.
Green if the overshoot is between 0 and 0.5 images Orange between 0 and one image Red beyond one imageIt's simple enough to understand and in the end provides a quick indication of the quality of the implementation of overdrive.
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