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Method for regulating the backlighting of a display

A liquid crystal display unit and sensor technology, applied in static indicators, incandescent lamp energy saving, control/regulation systems, etc., can solve the problem that the brightness sensor does not consider the spectral sensitivity of the human eye

Active Publication Date: 2011-07-06
BSH BOSCH & SIEMENS HAUSGERAETE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another disadvantage of this known lighting device is that the brightness sensor does not take into account the spectral sensitivity of the human eye, for example, when generating ambient brightness from different light sources

Method used

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  • Method for regulating the backlighting of a display
  • Method for regulating the backlighting of a display

Examples

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Embodiment Construction

[0025] Region I represents the switching on of the backlight, for example when a user is detected by a presence sensor or a motion sensor. Wherein the background light does not suddenly or suddenly change to full brightness, but is turned on continuously and linearly. In this case, the output value is the basic brightness value of the backlight preset by the user. In the case of a complete switch-off of the backlight, zero can also be output (not shown) as an output value for successively switched-on backlights during user recognition.

[0026] Region II represents the backlight that is switched on at a constant brightness as the ambient brightness increases and the user is present.

[0027] Region III represents the change of the backlight from a high brightness value to a low brightness value. This change is likewise effected continuously, in this case by a continuous linear decrease in the control percentage of the backlight. Such a reduction in the brightness of the bac...

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PUM

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Abstract

The invention relates to a device for controlling the luminosity of an illuminating device, in particular for LC-display units in household devices, comprising a sensor which is used to detect the presence of a user, and a luminosity sensor, wherein an exchange between two different luminosity values of the illuminating device according to the presence of a user and according to the surrounding luminosity takes place in a continuous manner.

Description

technical field [0001] The invention relates to a device for adjusting the brightness of an illuminating device, especially a display background light in the form of a liquid crystal display unit of a household appliance. Background technique [0002] The backlight of the display, which is switched off for a certain time after the end of the program and is activated again by actuating a key, is known, for example, from mobile phone displays. [0003] In the remote field, ie for outdoor lighting installations, there are known active signaling devices that switch on the light source when approaching a living being or object, such as a person, that radiates similar to infrared rays. In order not to cause this to occur during the daytime, a brightness sensor that is inhibited from being switched on during the daytime is integrated. The brightness sensor must be manually adjusted by the user at the switch-on time at which the outdoor lighting is to be switched on depending on th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02G05B19/042
CPCH05B39/042Y02B20/14Y02B20/00G09G3/3406
Inventor T·洛伦茨G·马杰B·西格马
Owner BSH BOSCH & SIEMENS HAUSGERAETE GMBH