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Method and apparatus for controlling light power

一种光功率、控制器的技术，应用在打印装置、光学、光学元件等方向，能够解决可变电阻器电阻改变等问题

Inactive Publication Date: 2005-02-09
HEWLETT PACKARD DEV CO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, the resistance of a fixed variable resistor may change due to heat

Method used

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  • Method and apparatus for controlling light power
  • Method and apparatus for controlling light power
  • Method and apparatus for controlling light power

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Embodiment Construction

[0015] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below to explain the present invention by referring to the figures.

[0016] figure 1 is a block diagram of an apparatus for controlling optical power according to an embodiment of the present invention. The device for controlling optical power includes a main controller 10 and a laser scanning unit (LSU) 20 . Such as figure 1 As shown, the optical power controller 12 is placed inside the main controller 10 . The main controller 10 with the optical power controller 12 is embodied as an application specific integrated circuit (ASIC). The laser scanning unit (LSU) 20 includes a plurality of optical elements, such as the aforementioned polygon mirrors, F-theta mirrors, imaging mirrors, and sync signal detection optical sensors, and also inclu...

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Abstract

A method and apparatus controlling a light power, the apparatus including a light power controller, which controls a quantity of light and disposed inside the main controller disposed outside the laser scanning unit, and a light generator, which generates light and disposed inside the laser scanning unit.

Description

[0001] This application claims priority from Korean Patent Application No. 2003-51106 filed with the Korean Intellectual Property Office on July 24, 2003, which is incorporated herein by reference in its entirety. technical field [0002] The present invention relates to a printing device, such as a printer, a scanner or a multifunctional device, and in particular to a method and device for controlling the optical power of a laser diode (LD), which is a laser scanning unit (LSU) in a printing device. element. Background technique [0003] A conventional laser scanning unit (LSU) includes multiple optical components such as: a laser diode (LD) emitting laser light; an automatic power controller (APC) for maintaining the optical power of the laser diode (LD) at a constant level; A collimating lens is used to make the emitted laser light become parallel light or converging light relative to the optical axis; a polygon mirror is used to scan the laser light passing through the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/44B41J29/38G03G15/04H04N1/40
CPCH04N1/40037B41J29/38G03G15/04
Inventor 韩硕均
Owner HEWLETT PACKARD DEV CO LP