US 10,462,862 B2
Light source control device and image forming apparatus
Hayato Fujita, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Hayato Fujita, Kanagawa (JP)
Filed on Jun. 5, 2018, as Appl. No. 15/997,858.
Claims priority of application No. 2017-113774 (JP), filed on Jun. 8, 2017.
Prior Publication US 2018/0359829 A1, Dec. 13, 2018
Int. Cl. H05B 33/08 (2006.01); G03G 15/043 (2006.01); H04N 1/113 (2006.01); G03G 15/00 (2006.01); G03G 15/01 (2006.01)
CPC H05B 33/0824 (2013.01) [G03G 15/0189 (2013.01); G03G 15/043 (2013.01); G03G 15/5058 (2013.01); H04N 1/1135 (2013.01); H05B 33/0851 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A light source control device, comprising circuitry to:
apply a threshold current, a first emission current, and a first correction current to a light source to drive the light source to emit light to form a first pixel, the first correction current correcting the first emission current during application of the first emission current to the light source; and
apply the threshold current, a second emission current, and a second correction current to the light source to drive the light source to emit light to form a second pixel, the second correction current correcting the second emission current during application of the second emission current to the light source,
wherein the circuitry calculates a value of the second correction current by multiplying a value of the first correction current by a ratio of a value of the second emission current to a value of the first emission current, the value of the second emission current being greater than the value of the first emission current.