Control device having buttons with automatically adjustable backlighting
First Claim
1. A control device comprising:
- a first button and a second button;
a first light source configured to illuminate the first button, and a second light source configured to illuminate the second button;
a light detector circuit configured to measure an ambient light level in a vicinity around the control device;
a memory for storing a first adjustment curve and a second adjustment curve; and
a control circuit configured to;
control the first light source to illuminate the first button to a first surface illumination intensity and control the second light source to illuminate the second button to a second surface illumination intensity, the second surface illumination intensity being less than the first surface illumination intensity; and
adjust the first surface illumination intensity in response to the ambient light level measured by the light detector circuit using the first adjustment curve, and adjust the second surface illumination intensity in response to the ambient light level measured by the light detector circuit using the second adjustment curve.
2 Assignments
0 Petitions
Accused Products
Abstract
A control device may comprise a plurality of buttons, a plurality of light sources located behind the respective buttons and configured to illuminate the buttons, a light detector circuit configured to measure an ambient light level around the control device, and/or a control circuit configured to control the light sources to adjust surface illumination intensities of the respective buttons in response to the measured ambient light level. Each button may comprise indicia indicating a function of the button. The control circuit set the first button as active and the second button as inactive in response to an actuation of the first button. The control circuit may, based on the measured ambient light level, control the light sources to illuminate the first button to an active surface illumination intensity, and to illuminate the second button to an inactive surface illumination intensity that is less than the active surface illumination intensity.
-
Citations
26 Claims
-
1. A control device comprising:
-
a first button and a second button; a first light source configured to illuminate the first button, and a second light source configured to illuminate the second button; a light detector circuit configured to measure an ambient light level in a vicinity around the control device; a memory for storing a first adjustment curve and a second adjustment curve; and a control circuit configured to; control the first light source to illuminate the first button to a first surface illumination intensity and control the second light source to illuminate the second button to a second surface illumination intensity, the second surface illumination intensity being less than the first surface illumination intensity; and adjust the first surface illumination intensity in response to the ambient light level measured by the light detector circuit using the first adjustment curve, and adjust the second surface illumination intensity in response to the ambient light level measured by the light detector circuit using the second adjustment curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A control device comprising:
-
a plurality of buttons; a plurality of light sources comprising light-emitting diodes (LEDs), wherein each of the plurality of light sources is configured to illuminate a respective button of the plurality of buttons; a light detector circuit configured to measure an ambient light level in a vicinity around the control device; a memory for storing a first adjustment curve and a second adjustment curve; and a control circuit configured to; set one of the plurality of buttons as active; control the light source associated with the active button to illuminate the active button to an active surface illumination intensity based on a measured ambient light level measured by the light detector using the first adjustment curve; control the light sources associated with the remaining of the plurality of buttons to illuminate the respective buttons to an inactive surface illumination intensity using the second adjustment curve, based on the measured ambient light level, and based on the relative location of the button with respect to the active button, the inactive surface illumination intensity less than the active surface illumination intensity. - View Dependent Claims (16, 17, 18)
-
-
19. A control device comprising:
-
a first button, a second button, and a third button, the first button located above the second button, and the third button located below the second button, the first button comprising first indicia located above a midpoint of the first button and indicating a function of the first button, the second button comprising second indicia located above a midpoint of the second button indicating a function of the second button, and the third button comprising third indicia located above a midpoint of the third button indicating the function of the third button; a first light source comprising first light-emitting diodes (LEDs) and configured to illuminate the first button, a second light source comprising second LEDs and configured to illuminate the second button, and a third light source comprising third LEDs and configured to illuminate the third button; a memory for storing an active adjustment curve and an inactive adjustment curve; a light detector circuit configured to measure an ambient light level in a vicinity around the control device; and a control circuit configured to; set the first button as active, the second button as inactive, and the third button as inactive; control the first light source to illuminate the first button to the active surface illumination intensity, control the second light source to illuminate the second button to the inactive surface illumination intensity, and control the third light source to illuminate the third button to the inactive surface illumination intensity, the inactive surface illumination intensity being less than the active surface illumination intensity; determine a first LED duty cycle to pulse-width modulate a first LED current conducted through the first LEDs to adjust the active surface illumination intensity in response to the ambient light level measured by the light detector circuit using the active adjustment curve; determine a second LED duty cycle to pulse-width modulate a second LED current conducted through the second LEDs to adjust the inactive surface illumination intensity in response to the ambient light level measured by the light detector circuit using the inactive adjustment curve; determine a third LED duty cycle to pulse-width modulate a third LED current conducted through the third LEDs to adjust the inactive surface illumination intensity in response to the ambient light level measured by the light detector circuit using the inactive adjustment curve, wherein the second LED duty cycle is less than the third LED duty cycle.
-
-
20. A control device comprising:
-
a first light source configured to illuminate a first location of the control device, and a second light source configured to illuminate a second location of the control device; a light detector circuit configured to measure an ambient light level in a vicinity around the control device; a memory for storing a first adjustment curve and a second adjustment curve; and a control circuit configured to; control the first light source to illuminate the first location to a first surface illumination intensity and control the second light source to illuminate the second location to a second surface illumination intensity, the second surface illumination intensity being less than the first surface illumination intensity; and adjust the first surface illumination intensity in response to the ambient light level measured by the light detector circuit using the first adjustment curve, and adjust the second surface illumination intensity in response to the ambient light level measured by the light detector circuit using the second adjustment curve. - View Dependent Claims (21, 22, 23, 24, 25, 26)
-
Specification