| http://www.w3.org/ns/prov#value | - Then, the required constant current Il is not provided to the LED, so that the LED stops emission of light and fails to function as a light-emitting element of the display. [0011] In order to circumvent such condition, the step-up voltage Vh is set to a voltage, for example 9V, that is sufficient for activation of two LEDs each requiring at most 4V, plus the transistor voltage Vce0 and an extra ma
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