Self-Test Mode; Optical; Generating Grayscales; Table 5. Optical Characteristics - Planar ICEBrite EL480.240-PR2 User Manual

Self-Test Mode

Optical

Generating Grayscales

For ordering information of el480-240-pr2 and other EL Displays, please visit http://www.eldisplays.com/el480-240-pr2/ or call +1-888-394-4998.
The display incorporates a self-test mode composed of two patterns displayed
for approximately 30 seconds each, and then repeated. The patterns are as
follows: Diagonal Lines, Diagonal Lines Inverted, Full On, 1 x 1 Checkerboard,
and 1 x 1 Checkerboard Inverted. The self-test mode is entered by resetting or
applying power to the display with the VCLK signal static. The display will
remain in the self-test mode until two edges of VCLK are detected.

Table 5. Optical Characteristics.

Luminance
Lon (areal), min 30 cd/m²
Lon (areal), typ 50 cd/m²
Loff (pixel), max 0.3 cd/m²
Non-uniformity
All pixels fully lit 26%
Luminance Variation (Temperature)
±
Maximum
Luminance Variation (Time)
Maximum <10%
Viewing Angle
Minimum
160
Contrast Ratio
Minimum 19:1
Typical 50:1
Some applications may benefit by using grayscales. The PR2 has a maximum
frame rate frequency of 120 Hz. Using the higher frame rate, combined with
flat panel controllers designed for this faster display, it is possible to generate
usable grays through frame rate control and dithering. Video controllers from
manufacturers such as C&T and EPSON use these methods with proprietary
algorithms to generate grayscales.
The response time of electroluminescent displays is much faster than LCDs,
therefore not all possible grayscales generated by the video controller are actually
usable. Many of the grayscales may flicker or swim. Careful testing is necessary to
select appropriate grayscales for an application, especially when the
electroluminescent displays are driven at less than their maximum frame rate. For
additional information, refer to Planar Application Note 119 or contact Planar's
Application Engineers.
screen center, 120 Hz frame rate
screen center, 120 Hz frame rate
5 points: center plus four corners measured
±
1.0 0.25" from adjacent display edges, 120 Hz
Maximum difference two of five points, using the
formula:
LNU%=[1- (min_lum/max_lum)] x 100
Across operating temperature range
15%
15,000 hours at 25
°
@ 500 lux ambient, 120 Hz frame rate
EL480.240-PR2 Operations Manual (020-0347-00A)
°
C ambient
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