Element Path: <cwt><CORE><TFTBacklight>
CWT 2120 and CWT Compact display
This attribute controls the use and the brightness of the background illumination in a TFT display.
The power save function may override some light behaviour and some light configurations. See powerSaveMode in CORE element, and Example of a light setup, for more details including examples
Note: For controlling TFT Backlight brightness from UI-buttons, see the Click function OnSetTftBacklight in the CWT User Interface Design Handbook. |
attributes
brightnessMax
| Range: | 0 – 100 |
| Default: | for Mains 80 |
| Description: | Maximum brightness in % |
Note: when in Solar mode the default will be 40% |
brightnessMin
| Range: | 0 – 100 |
| Default: | for Mains 0 |
| Description: | Minimum brightness in % |
darkerThenLessBrightness
| Range: | true / false |
| Default: | for Mains true |
| Description: | If true, the light will decrease when it darkens outside. If false, the light will increase when it darkens outside. |
darknessMode
| Range: | Threshold, LinearFromThreshold |
| Default: | for Mains Threshold |
| Description: | The darkness dependent light modes are controlled by the Ambient Light module. |
Threshold: The brightness is set to a fixed (min./max.) value depending on whether the measured ambient light is above or below the threshold set for the ambient light sensor.
LinearFromThreshold: The backlight brightness is changed linearly to the measured ambient light when the measured ambient light is above or below the threshold (depending on the setting of the attribute darkerThenLessBrightness).
The hysteresis is not used when LinearFromTreshold mode is selected.
mode
| Range: | AlwaysOff, AlwaysOn, TurnedOnDuringPurchase, ChangedDuringDarkness, TurnedOnDuringPurchaseInDarkness, TimeControlled |
| Default: | for Mains AlwaysOn |
| Description: | AlwaysOff: The backlight is always off |
AlwaysOn: Always ON except when in sleep mode. attribute brightnessMax defines brightness when turned ON
TurnedOnDuringPurchase: Always ON except when in sleep mode. attribute brightnessMax defines brightness during purchase. attribute brightnessMin defines brightness during idle when not in sleep mode
ChangedDuringDarkness: The Ambient Light module calculates the brightness value. See ambientLightSensor.
TurnedOnDuringPurchaseInDarkness: Turned ON at brightnessMin during idle when not in sleep. During a purchase, The Ambient Light module calculates the brightness value. See ambientLightSensor.
TimeControlled: Time controlled brightness values
