| 摘要 |
PROBLEM TO BE SOLVED: To provide a light emitting device that accurately corrects a variation in the intensity of light due to an environmental temperature of a light emitting element irrespective of the degree of deterioration of the light emitting element, and an image forming apparatus.SOLUTION: In temperature correction of the amount of a driving current in OLEDs, after measurement of an environmental temperature by a temperature sensor 320, the following processing is repeated for each of the OLEDs 201. First, the degree of deterioration of each of the OLEDs 201 is determined by a deterioration degree calculation part 501. The degree of deterioration can be determined by referring to a deterioration coefficient table 502 to determine a deterioration coefficient for each of combinations of an environmental temperature, the amount of a driving current, and an integrated light-emission time, and multiplying the integrated light-emission time by the deterioration coefficient. Referring to a correction coefficient table 505 to determine a correction coefficient corresponding to a combination of the degree of deterioration, the set light intensity, and the environmental temperature, and multiplying the set current amount stored for each of the OLEDs 201 in a set current amount storage part 506 by the correction coefficient to correct the amount of a driving current.SELECTED DRAWING: Figure 5 |
