System and method for constructing a backlighted display using dynamically optimized light source
First Claim
Patent Images
1. A back-light display comprising:
- a first light source having a first light emitting characteristic;
a second light source having a second light emitting characteristic, and a control circuit for adjusting one of said light sources relative to the other of said light sources dependant upon the output brightness desired of said display at any point in time.
5 Assignments
0 Petitions
Accused Products
Abstract
A combination of light source types is used to form a dynamically adjusted backlighted display with the particular combination dependant upon the desired light output at a given point in time. In one embodiment, RGB diodes are used for low brightness situations and as the brightness requirement increases white light sources are added. In another embodiment, different light source types are used to produce the different color components and optical feedback is used to control the power levels of the various diode types.
-
Citations
22 Claims
-
1. A back-light display comprising:
-
a first light source having a first light emitting characteristic;
a second light source having a second light emitting characteristic, and a control circuit for adjusting one of said light sources relative to the other of said light sources dependant upon the output brightness desired of said display at any point in time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. The method of constructing a backlighted display, said method comprising:
-
positioning a first light source having a first light emitting characteristic so that light coming from said first light source impacts a liquid crystal display;
(LCD);
positioning a second light source having a second light emitting characteristic so that light coming from said second light source mixes with said light coming from said first light source so as to control the color and intensity of the light impacting said LCD; and
connecting at least one of said first or second light sources in a manner to be controlled independently depending upon the output brightness desired from said LCD. - View Dependent Claims (13, 14, 15, 16, 17)
-
-
18. A LCD backlighted display comprising:
-
a first light source having a first light emitting characteristic;
a second light source having a second light emitting characteristic, and means for adjusting one of said light sources relative to the other of said light sources dependant upon the output light intensity desired of said display. - View Dependent Claims (19, 20, 21, 22)
-
Specification