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US 6,888,561 B2Granted
Beam control device
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorTatsuyuki Miura
Life of this patent
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Abstract
According to a beam control device of the present invention, if an exposure device including a light emitting section is instructed to form an image and a predetermined current is then supplied to an application specific integrated circuit and a main control section, then the main control section outputs an light emitting section on signal. Then, the light emitting section outputs light having its intensity changed according to image information.
Claims7
A beam control device comprising:
- a beam scanning section including a polarizing device which polarizes a light beam, to polarize the light beam so that the beam travels in a first direction;
- horizontal synchronizing signal generating means for generating a horizontal synchronizing signal by detecting a light beam from the beam scanning section;
- an application specific integrated circuit which controls a light beam from said beam scanning section according to image data, in response to the horizontal synchronizing signal from the horizontal synchronizing signal generating means;
- and
- a central processing unit which controls the polarizing device of the beam scanning section;
- wherein after the application specific integrated circuit and the central processing unit have been activated, the central processing unit controls start of generation of a light beam by the beam scanning section, and if the horizontal synchronizing signal generating means generates a horizontal synchronizing signal, the integrated circuit starts controlling the light beam.
3 more elements
An image forming apparatus which forms an image based on an electrostatic latent image, the apparatus comprising:
- a light source which emits light of a predetermined wavelength;
- polarizing means for polarizing the light from the light source so that the light travels along a first direction;
- horizontal synchronizing signal detecting means for detecting the light from the light source which has been polarized by the polarizing means and outputting a horizontal synchronizing signal on the basis of a result of the detection;
- a first processing device which causes the light source to emit the light of the predetermined wavelength in response to the horizontal synchronizing signal from the horizontal synchronizing signal generating means;
- and
- a second processing device which associates the light of the predetermined wavelength from the light source, with image data and causes the polarizing means to polarize the light using a predetermined timing.
3 more elements
Dependencies are inferred from the claim text.