An input voltage stabilization circuit for a rear combination lamp, comprising: an optical output unit including a plurality of Organic Light Emitting Diodes, OELDs, (431a, 431b,...,431n); a Direct Current to Direct Current, DC-DC, converter configured to supply an output voltage for driving the plurality of OLEDs by raising or lowering a voltage of a main power supplied by a vehicle battery; a feedback unit configured to provide information about a highest of voltage values required for the plurality of OLEDs, as a feedback to the DC-DC converter; and a converter protector configured to, upon occurrence of failure in at least one of the plurality of OLEDs, protect the DC-DC converter, wherein the converter protector comprises: a first output voltage limiter configured to provide a voltage output based on a limit voltage value which is a voltage divided from the output voltage for limiting the output voltage, and characterized in that the voltage stabilization circuit comprises a second output voltage limiter configured to provide a voltage output based on a limit voltage value based on temperatures sensed at a plurality of points of a circuit board, wherein the second output voltage limiter comprises a plurality of Negative Temperature Coefficient, NTC, thermistors arranged at the plurality of points, and wherein the plurality of NTC thermistors is arranged at points having low temperatures on the circuit board, wherein the converter protector further comprises a diode OR gate configured to select a higher voltage value between the voltage output from the first output voltage limiter and the voltage output from the second output voltage limiter as the feedback to the DC-DC converter, wherein the DC-DC converter is adapted to adjust the output voltage based on the feedback. an optical output unit including a plurality of Organic Light Emitting Diodes, OELDs, (431a, 431b,...,431n); a Direct Current to Direct Current, DC-DC, converter configured to supply an output voltage for driving the plurality of OLEDs by raising or lowering a voltage of a main power supplied by a vehicle battery; a feedback unit configured to provide information about a highest of voltage values required for the plurality of OLEDs, as a feedback to the DC-DC converter; and a converter protector configured to, upon occurrence of failure in at least one of the plurality of OLEDs, protect the DC-DC converter, wherein the converter protector comprises: a first output voltage limiter configured to provide a voltage output based on a limit voltage value which is a voltage divided from the output voltage for limiting the output voltage, and characterized in that the voltage stabilization circuit comprises a second output voltage limiter configured to provide a voltage output based on a limit voltage value based on temperatures sensed at a plurality of points of a circuit board, wherein the second output voltage limiter comprises a plurality of Negative Temperature Coefficient, NTC, thermistors arranged at the plurality of points, and wherein the plurality of NTC thermistors is arranged at points having low temperatures on the circuit board, wherein the converter protector further comprises a diode OR gate configured to select a higher voltage value between the voltage output from the first output voltage limiter and the voltage output from the second output voltage limiter as the feedback to the DC-DC converter, wherein the DC-DC converter is adapted to adjust the output voltage based on the feedback. a first output voltage limiter configured to provide a voltage output based on a limit voltage value which is a voltage divided from the output voltage for limiting the output voltage, and characterized in that the voltage stabilization circuit comprises a second output voltage limiter configured to provide a voltage output based on a limit voltage value based on temperatures sensed at a plurality of points of a circuit board, wherein the second output voltage limiter comprises a plurality of Negative Temperature Coefficient, NTC, thermistors arranged at the plurality of points, and wherein the plurality of NTC thermistors is arranged at points having low temperatures on the circuit board, wherein the converter protector further comprises a diode OR gate configured to select a higher voltage value between the voltage output from the first output voltage limiter and the voltage output from the second output voltage limiter as the feedback to the DC-DC converter, wherein the DC-DC converter is adapted to adjust the output voltage based on the feedback.