MULTIPLE LIGHT SENSORS AND ALGORITHMS FOR LUMINANCE CONTROL OF MOBILE DISPLAY DEVICES
First Claim
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1. A method of controlling a lighting unit of a display, comprising the steps of:
- a. determining a maximum value of ambient light intensity sensed from a first direction relative to the display and from a second direction, different from the first direction, relative to the display; and
b. driving the lighting unit so that light from the lighting unit has a low intensity when the maximum value is less than a first intensity threshold and so that light from the lighting unit has a high intensity, greater than the low intensity, when the maximum value is greater than a second intensity threshold.
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Abstract
In a method of controlling a lighting unit of a display, a maximum value of ambient light intensity is determined (156). Ambient light intensity is sensed (154) from a first direction relative to the display and from a second direction, different from the first direction, relative to the display. The lighting unit is driven so that light from the lighting unit has a low intensity (172) when the maximum value is less than a first intensity threshold and so that light from the lighting unit has a high intensity, greater than the low intensity, when the maximum value is greater than a second intensity threshold.
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Citations
19 Claims
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1. A method of controlling a lighting unit of a display, comprising the steps of:
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a. determining a maximum value of ambient light intensity sensed from a first direction relative to the display and from a second direction, different from the first direction, relative to the display; and b. driving the lighting unit so that light from the lighting unit has a low intensity when the maximum value is less than a first intensity threshold and so that light from the lighting unit has a high intensity, greater than the low intensity, when the maximum value is greater than a second intensity threshold. - View Dependent Claims (2, 3, 4, 5)
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6. A method of controlling light intensity from a lighting unit of a display, comprising the steps of:
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a. determining an average intensity of ambient light around the display; and b. changing the light intensity from a low value to a high value when the light intensity has been set at a low value and the average intensity has a value above a first predetermined threshold and changing the light intensity from a high value to a low value when the light intensity has been set at a high value and the average intensity has a value below a second predetermined threshold, the first threshold being greater than the second threshold. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A method of controlling a lighting unit of a display, comprising the steps of:
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a. determining a maximum value of ambient light intensity sensed from a first direction relative to the display and from a second direction, different from the first direction, relative to the display; and b. driving the lighting unit so that light from the lighting unit has a high intensity value when the maximum value is less than a first intensity threshold and so that light from the lighting unit has a low intensity, less than the low intensity, when the maximum value is greater than a second intensity threshold.
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15. An apparatus for controlling intensity of light from a lighting unit of a display, comprising:
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a. a first light sensor that senses light intensity from a first direction relative to the display and that generates a first output corresponding thereto; b. a second light sensor that senses light intensity from a second direction, different from the first direction, relative to the display and that generates a second output corresponding thereto; c. a light intensity control circuit, responsive to the first output and the second output, that is configured to determine a maximum value of ambient light intensity sensed from the first light sensor and the second light sensor and that is configured to control an intensity of light generated by the lighting unit of the display so that the intensity is set at a low value when the maximum value is below a first intensity threshold and so that the intensity is set at a high value when the maximum value is above a second intensity threshold. - View Dependent Claims (16, 17, 18, 19)
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Specification