Optical Performance
Table 6. Optical Characteristics.
Luminance | Lon (areal), min | Lon (areal), typ | Loff (areal), max | |
AM1 | 40 cd/m² |
| 65 cd/m² | 0.3 cd/m² |
AM8 IN/ET/ETL | 35 cd/m² |
| 49 cd/m² | 0.3 cd/m² |
Minimum and Typical: Center, 120 Hz frame rate |
| |||
Maximum: Center and four corners, 120 Hz frame rate |
| |||
|
|
|
| |
AM1 | 35% | All pixels fully on @120 Hz |
| |
AM8 IN/ET/ETL | 26% | Maximum difference two of five points, | ||
|
| using the formula: |
| |
|
| BNU%=[1- (min_lum/max_lum)] x 100% | ||
Luminance Variation (Temperature) |
|
|
| |
Maximum | 15% | Across operating temperature range | ||
Luminance Variation (Time) |
|
|
| |
Maximum |
|
|
|
|
AM1 | 20% | 10,000 hours at 25°C ambient | ||
AM8 IN/ET/ETL | 10% | 10,000 hours at 25°C ambient | ||
|
|
|
|
|
Viewing Angle |
|
|
|
|
Minimum | 160° |
|
|
|
Contrast Ratio | Minimum |
| Typical |
|
AM1 | 19:1 |
| 40:1 |
|
AM8 IN/ET/ETL | 35:1 |
| 70:1 |
|
Minimum: @ 500 lux ambient, @ 120 Hz frame rate
Dimming
There are two standard methods for dimming the AM displays. Frame rate dimming allows the brightness of the display to be lowered proportionally by reducing the frame rate. Analog dimming allows the brightness to be reduced with an external, user supplied potentiometer or electronic circuitry. The brightness range for analog dimming is from 100% to nearly 5% of the full brightness.
Frame rate dimming is performed within the application by lowering the frame rate of the video input signals. Because brightness is proportional to refresh rate, the display can be dimmed by adding pauses between every horizontal period.
The lowest possible frame rate (brightness) is dependent on the perceived flicker of the displayed image, but will most likely be around 60 Hz. For more information on frame rate dimming please see Planar Application Note 120.
The analog dimming feature utilizes a 50k ohm logarithmic external potentiometer, allowing manual control of the display’s brightness. Analog dimming is standard on the AM8 IN and AM8 ET displays. The typical current for minimum brightness is 220 µA.
13 |
