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e-STUDIO350/450 SCANNER
6 - 8
November 2003 © TOSHIBA TEC
6
6.4
Control of Exposure Lamp
6.4.1 General description
Control circuit for the exposure lamp consists of the following three blocks:
(1)
Lighting device for the xenon lamp (Inverter)
Turns ON/OFF the exposure lamp.
(2)
CCD circuit
This circuit converts the reflected light amount from the original surface and the shading correction
plate to electrical signals. The exposure amount is controlled in two ways:
(a) White reference formation - reads the reflected light amount from the white shading correction plate
(b) Black reference formation - reads the light amount at the regulation position with the exposure
lamp lights OFF
(3)
Image processing circuit
A series of image processes such as a gamma correction and a shading correction are applied on
the output signal from the CCD. The signal is then digitized and output from this circuit.
PWA-CCD
PWA-SLG
A/D
Fig. 6-401
Original
Shading correction plate
Exposure lamp (xenon lamp)
CCD
Lighting device for
xenon lamp
(Inverter)
Scanner
CPU
Image processing circuit
Содержание e-STUDIO350
Страница 1: ...MULTIFUNCTIONAL DIGITAL SYSTEMS e STUDIO350 450 File No SME03002800 R03092140700 TTEC Ver00 2003 11 ...
Страница 2: ... 2003 TOSHIBA TEC CORPORATION All rights reserved ...
Страница 94: ...e STUDIO350 450 GENERAL OPERATION 4 16 November 2003 TOSHIBA TEC 4 ...
Страница 108: ...e STUDIO350 450 CONTROL PANEL 5 14 November 2003 TOSHIBA TEC 5 10 Remove 16 screws and take off the KEY board Fig 5 509 ...
Страница 182: ...e STUDIO350 450 PAPER FEEDING SYSTEM 9 32 November 2003 TOSHIBA TEC 9 ...
Страница 188: ...e STUDIO350 450 DRIVE SYSTEM 10 6 November 2003 TOSHIBA TEC 10 ...
Страница 208: ...e STUDIO350 450 DRUM RELATED SECTON 11 20 November 2003 TOSHIBA TEC 11 ...
Страница 224: ...e STUDIO350 450 DEVELOPMENT SYSTEM 12 16 November 2003 TOSHIBA TEC 12 ...
Страница 270: ...e STUDIO350 450 AUTOMATIC DUPLEXING UNIT 14 20 November 2003 TOSHIBA TEC 14 ...
Страница 278: ...e STUDIO350 450 POWER SUPPLY UNIT 15 8 November 2003 TOSHIBA TEC 15 ...
Страница 279: ...November 2003 TOSHIBA TEC 16 1 e STUDIO350 450 PC BOARDS 16 16 PC BOARDS 1 PWA F SYS ...
Страница 280: ...e STUDIO350 450 PC BOARDS 16 2 November 2003 TOSHIBA TEC 16 2 PWA F LGC ...
Страница 281: ...November 2003 TOSHIBA TEC 16 3 e STUDIO350 450 PC BOARDS 16 3 PWA F SLG 4 PWA F CCD 5 PWA F LRL ...
Страница 282: ...e STUDIO350 450 PC BOARDS 16 4 November 2003 TOSHIBA TEC 16 6 PWA F LDR 7 PWA F SNS 8 PWA F ADU ...
Страница 283: ...November 2003 TOSHIBA TEC 16 5 e STUDIO350 450 PC BOARDS 16 9 PWA F DSP 10 PWA F KEY ...
Страница 285: ......
Страница 286: ...1 1 KANDA NISHIKI CHO CHIYODA KU TOKYO 101 8442 JAPAN ...