Display device with feedback brightness sensing
First Claim
1. A display device with feedback brightness sensing, comprising:
- a display device, having a display panel;
a first photo-sensor, sensing a light brightness variation of an external environment of the display panel and outputting a corresponding sensing signal;
a first converter, connected to the first photo-sensor and converting the sensing signal to a corresponding first digital reference signal;
a light-guiding element, receiving and transmitting a light brightness emitted from the display panel;
a feedback sensing unit, comprised of a second photo-sensor and a second converter, the second photo-sensor sensing a light variation from the light-guiding element that is converted through the second converter to a second digital reference signal; and
a microprocessor, controlling the light brightness emitted from the display panel according to a variation of the first and second digital reference signals.
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Abstract
The present invention provides a display device with feedback brightness sensing, suitable for using in a PDA, that comprises a LCD panel at an outside of which is installed a first photo-sensor for sensing a light brightness variation of its environment. A corresponding sensing signal is delivered to a first converter to be converted to a first digital reference signal that is delivered to a microprocessor for determining a brightness increase or decrease of the display panel. Via a light-guiding element and a second photo-sensor installed within the display panel, the light brightness from the display panel is sensed and converted to a second digital reference signal that is compared with the first digital reference signal to determine whether the display brightness is at an optimal value. An automatic brightness adjustment of the display device is thereby achieved to reduce power consumption and protect the user'"'"'s eyes.
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Citations
11 Claims
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1. A display device with feedback brightness sensing, comprising:
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a display device, having a display panel;
a first photo-sensor, sensing a light brightness variation of an external environment of the display panel and outputting a corresponding sensing signal;
a first converter, connected to the first photo-sensor and converting the sensing signal to a corresponding first digital reference signal;
a light-guiding element, receiving and transmitting a light brightness emitted from the display panel;
a feedback sensing unit, comprised of a second photo-sensor and a second converter, the second photo-sensor sensing a light variation from the light-guiding element that is converted through the second converter to a second digital reference signal; and
a microprocessor, controlling the light brightness emitted from the display panel according to a variation of the first and second digital reference signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification