Nonlinear voltage controlled current source with feedback circuit
First Claim
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1. A light emitting pixel circuit comprising a light emitting diode having a parasitic capacitance and coupled to a current source;
- nonlinear feedback means for rapidly charging the parasitic capacitance and for enabling, immediately following such charging, illumination of the diode responsive to a predefined constant current level from the current source.
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Abstract
A light emitting pixel circuit comprising a light emitting diode having a parasitic capacitance and coupled to a current source; nonlinear feedback means for rapidly charging the parasitic capacitance and for enabling immediately following such charging, illumination of the diode, responsive to a predefined constant current level from the current source.
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Citations
6 Claims
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1. A light emitting pixel circuit comprising a light emitting diode having a parasitic capacitance and coupled to a current source;
- nonlinear feedback means for rapidly charging the parasitic capacitance and for enabling, immediately following such charging, illumination of the diode responsive to a predefined constant current level from the current source.
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2. A light emitting pixel circuit wherein said current source is voltage controlled by operation of the feedback means.
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3. A light emitting pixel circuit including means for controlling the charging time.
- 4. A light emitting pixel circuit, wherein the feedback means include current sense means.
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