Laser driver

OPT OpenIR > 半导体激光器专利数据库

	Laser driver
其他题名	Laser driver
	KAWANA TAKASHI; SAITO TETSUO; MANO HIROSHI; KASHIWABARA ATSUSHI
	1991-10-18
专利权人	CANON INC
公开日期	1991-10-18
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To perform a dense and pale printing of high quality by providing a plurality of constant-current generating means, controlling quantities of lights at respective light quantity levels, and then emitting lasers at several levels of light quantities by a plurality of image signals. CONSTITUTION:A laser forcible lighting signal LDON1 is set to 'L' simultaneously upon starting of an APC, a latch input data 20 is incrementally increased to gradually raise the voltage of the output signal APC1 of a D/A converter 4, thereby increasing a laser driving current Il When the laser output exceeds a specific value of low quantity of light, a latch circuit 2 latches the input data of the converter 4, and sets a laser forcible lighting signal LDON2 to 'L' while a laser current is flowing to a semiconductor laser 10. The input data of the circuit 2 is incrementally increased to raise a laser driving current Il2, and when the quantity of the laser reaches a specific value of high quantity of light, the input data of a D/A converter 5 is latched to a latch circuit 3. Thereafter, video signals VIDEO1, VIDEO2 are input, and the laser 10 varies a density while varying the quantity of light to high or low to print it.
其他摘要	用途：通过提供多个恒定电流发生装置，控制各个光量水平的光量，然后通过多个图像信号发射几个光量水平的激光，进行高质量的密集和苍白打印。组成：激光强制发光信号LDON1在APC启动时同时设置为'L'，闩锁输入数据20逐渐增加，逐渐提高D / A转换器4的输出信号APC1的电压，从而增加激光驱动电流Il1。当激光输出超过低光量的特定值时，锁存电路2锁存转换器4的输入数据，并且在激光电流流向半导体激光器10的同时将激光强制点亮信号LDON2设置为“L”。电路2的输入数据逐渐增加以提高激光器驱动电流Il2，并且当激光器的量达到高光量的特定值时，D / A转换器5的输入数据被锁存到此后，输入视频信号VIDEO1，VIDEO2，并且激光器10改变密度，同时将光量改变为高或低以打印它。
申请日期	1990-02-09
专利号	JP1991234075A
专利状态	失效
申请号	JP1990030655
公开（公告）号	JP1991234075A
IPC 分类号	B41J2/44 \| G02F1/01 \| G03G15/04 \| H01S5/068 \| H04N1/23 \| H01S3/133
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/69095
专题	半导体激光器专利数据库
作者单位	CANON INC
推荐引用方式 GB/T 7714	KAWANA TAKASHI,SAITO TETSUO,MANO HIROSHI,et al. Laser driver. JP1991234075A[P]. 1991-10-18.

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