Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art and a kind of exposure adjusting gear and method are provided, can answer the setting of resolution or photoelectric conversion component output voltage values to change depth of exposure.
Purpose of the present invention can realize by following measure:
A kind of exposure adjusting gear, be applied in the device of image scanning, this device of image scanning includes a focalizer and a photoelectric conversion component, and this exposure adjusting gear comprises: a control device, resolution setting that should device of image scanning and send a control signal; One drive unit is electrically connected on this control device, and it should control signal and produces driving force; And a removable slit sheet, being connected to this drive unit, it is subjected to the driving of this drive unit and changes the position, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.
This control device is made of a special IC.
This drive unit is an electro-motor, is electrically connected on this control device, and its this electro-motor should control signal and drive this removable slit sheet and produce rotation.
Have a printing opacity hole on this removable slit sheet, it is subjected to the driving of this drive unit and changes the effective light transmission area of this printing opacity hole, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.
This control device can device of image scanning high-resolution set and send this control signal, and then the effective light transmission area of this removable slit sheet is diminished; Low resolution that in addition can device of image scanning is set and is sent this control signal, and then makes the effective light transmission area of this removable slit sheet become big.
Purpose of the present invention also can realize by following measure:
A kind of exposure adjusting gear, be applied in the device of image scanning, this device of image scanning includes a focalizer and a photoelectric conversion component, and this exposure adjusting gear comprises: a control device, output voltage values that should photoelectric conversion component and send a control signal; One drive unit is electrically connected on this control device, and it should control signal and produces driving force; And a removable slit sheet, being connected to this drive unit, it is subjected to the driving of this drive unit and changes the position, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.
This control device is made of a special IC.
This drive unit is an electro-motor, is electrically connected on this control device, and its this electro-motor should control signal and drive this removable slit sheet and produce rotation.
Have a printing opacity hole on this removable slit sheet, it is subjected to the driving of this drive unit and changes the effective light transmission area of this printing opacity hole, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.
This control device can photoelectric conversion component output voltage values send this control signal during less than a setting value, and then make the effective light transmission area of this removable slit sheet become big; Output voltage values that in addition can photoelectric conversion component is during greater than another setting value and send this control signal, and then the effective light transmission area of this removable slit sheet is diminished.
Purpose of the present invention also can realize by following measure:
A kind of exposure adjusting gear, be applied in the device of image scanning, this device of image scanning includes a focalizer and a photoelectric conversion component, and this exposure adjusting gear comprises: a control device, resolution setting that should device of image scanning and send a control signal; And a variable light transmission device, be electrically connected to this control device, have a transmission region on it, the shape of this transmission region is subjected to the control of this control signal and changes, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.
This variable light transmission device comprises: a drive unit, be electrically connected on this control device, and it should control signal and produces driving force; And a removable slit sheet, being connected to this drive unit, it is subjected to the driving of this drive unit and changes the position, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.
This variable light transmission device is a LCD screen, is electrically connected on this control device, and it should control signal and change the size of its lightproof area and transmission region, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.
Purpose of the present invention also can realize by following measure:
A kind of exposure adjusting gear, be applied in the device of image scanning, this device of image scanning includes a focalizer and a photoelectric conversion component, and this exposure adjusting gear comprises: a control device, output voltage values that should device of image scanning and send a control signal; And a variable light transmission device, be electrically connected to this control device, have a transmission region on it, the shape of this transmission region is subjected to the control of this control signal and changes, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.
This variable light transmission device comprises: a drive unit, be electrically connected on this control device, and it should control signal and produces driving force; And a removable slit sheet, being connected to this drive unit, it is subjected to the driving of this drive unit and changes the position, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.
This variable light transmission device is a LCD screen, is electrically connected on this control device, and it should control signal and change the size of its lightproof area and transmission region, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.
Purpose of the present invention also can realize by following measure:
A kind of exposure method of adjustment, be applied in the device of image scanning, this device of image scanning includes a focalizer and a photoelectric conversion component, and this exposure method of adjustment comprises: resolution setting that should device of image scanning and send a control signal; And be subjected to the control of this control signal and adjust the light intensity that enters this focalizer and this photoelectric conversion component.
Purpose of the present invention also can realize by following measure:
A kind of exposure method of adjustment, be applied in the device of image scanning, this device of image scanning includes a focalizer and a photoelectric conversion component, and this exposure method of adjustment comprises: output voltage values that should device of image scanning and send a control signal; And be subjected to the control of this control signal and adjust the light intensity that enters this focalizer and this photoelectric conversion component.
Embodiment
See also Fig. 3, it is bare engine module internal structure synoptic diagram with image scanner of exposure adjusting gear of the present invention, reflected or the light that penetrates out enters from a removable slit sheet 30 of bare engine module by scanned (not shown), see through the focusing of the focalizer that constitutes by lens combination 31 and expose on the photoelectric conversion component that constitutes by Charged Coupled Device 32 that arrive, and then finish opto-electronic conversion and move.And removable slit sheet 30 is connected to the drive unit of a use electro-motor 33, and it is subjected to the driving of this electro-motor 33 and produces rotation, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.By a special IC (Application Specific Integrated Circuit; ASIC) control device 34 of Gou Chenging can send control signal because of the resolution setting of this device of image scanning, for instance, in same image scanner, under the setting of resolution 300dpi, the effective light transmission area of this removable slit sheet 30 is with the effective light transmission area that is adjusted to greater than this removable slit sheet 30 under the setting of resolution 600dpi.
Structure about removable slit sheet 30 sees also Fig. 4 (a) and Fig. 4 (b) with the action synoptic diagram, Fig. 4 (a) is the front schematic view of removable slit sheet 30, find out by knowing among the figure, wherein mainly has a printing opacity hole 301, be generally the dog bone shape that presents the wide central narrow in two ends, in order to the more weak phenomenon of compensated scanning line two ends light intensity, reflected or the light that penetrates out passes by scanned (not shown) in order to allow, and then expose on the Charged Coupled Device 32 that arrives through the focusing of lens combination 31 again, and this angle is for Charged Coupled Device 32, has maximum effective light transmission area, therefore can under the setting of resolution 300dpi, use, in the hope of preferable exposure effect.As under the setting of resolution 600dpi, control device 34 can resolution 600dpi setting and send control signal, make electro-motor 33 can allow removable slit sheet 30 rotation and be the angle shown in Fig. 4 (b), thus, the effective light transmission area of this removable slit sheet 30 is with reduced, make that under the setting of two different resolutions, the exposure of Charged Coupled Device 32 still can be kept unanimity, and then avoid the generation of known technology shortcoming.
In addition, this control device 34 changes the effective light transmission area except setting that can resolution, also can use instead and should judge from the output voltage values that this Charged Coupled Device 32 is fed back, when finding that magnitude of voltage that Charged Coupled Device 32 is exported is lower than a setting value, just send this control signal and remove to increase the effective light transmission area of this removable slit sheet 30, otherwise, the magnitude of voltage of being exported when Charged Coupled Device 32 then sends the effective light transmission area that this control signal removes to reduce this removable slit sheet 30 when being higher than another setting value, so the effective light transmission area can be controlled at a proper range.
In addition, removable slit sheet 30 also can be used other kind of mechanism's form instead with electro-motor 33 and finish, action and the structural map shown in Fig. 5 (a) and Fig. 5 (b) for example, it is to be made of 50,51 of the removable slit sheets that two glazed areas vary in size, but can produce the change of glazed area equally in response to the control of control signal, when when only removable slit sheet 50 is inserted in rotation, can obtain bigger glazed area.If removable slit sheet 50 and are inserted in rotation at 51 o'clock simultaneously, will obtain less glazed area.
See also Fig. 6 (a) and Fig. 6 (b) again, it is the organigram with the variable light transmission device of a LCD screen 60 formations, it is electrically connected on this control device, it should control signal and change the size of its lightproof area and transmission region, and then adjusts the light intensity that enters this focalizer and this photoelectric conversion component.Wherein Fig. 6 (a) has shown lightproof area and the transmission region when high resolving power is set, and Fig. 6 (b) has shown lightproof area and transmission region when low resolution is set.
In sum, apparatus of the present invention can answer the setting of resolution or the level of photoelectric conversion component output voltage to change depth of exposure, and then can effectively improve the shortcoming of known technology.