I have been thinking of the issue of the dimming of the White-LED based backlights of which my 633 is starting to show symptoms of.
Might I suggest the following as a way to extend the life of the unit before having to resort to actions akin to transplant surgery.
While designing (or revising) a product that uses White-LED based backlights, include a redundant backlight circuit with it's own set of LEDs that stay off until a command to the microcontroller on the unit forces this backup circuit to become the main backlight source.
I can see that it would add a little to the price of a unit for the extra LEDs, current limiting resistors and any extra components used in a backlight, but I feel that for the extended backlight lifespan, people would pay the extra cost. I know I would.
Might I suggest the following as a way to extend the life of the unit before having to resort to actions akin to transplant surgery.
While designing (or revising) a product that uses White-LED based backlights, include a redundant backlight circuit with it's own set of LEDs that stay off until a command to the microcontroller on the unit forces this backup circuit to become the main backlight source.
I can see that it would add a little to the price of a unit for the extra LEDs, current limiting resistors and any extra components used in a backlight, but I feel that for the extended backlight lifespan, people would pay the extra cost. I know I would.
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