JPS60114883A - Picture processing device - Google Patents

Abstract

PURPOSE:To reduce considerably waste of paper due to density defect by constituting a device so that automatic density adjustment and manual density adjustment can be switched with a density adjustment switching means, and switching an automatic density adjustment mode to a manual density adjustment mode. CONSTITUTION:When an automatic/manual copy density control changeover key 206 is depressed, an automatic density adjustment mode indicator 220 is lit or extinguished. Lighting of the automatic density adjustment mode indicator 220 indicates that the automatic density adjustment mode is selected, and extinction of this indicator 220 indicates that the manual density adjustment mode where a manual density adjustment mode indicator 221 is lit. In the manual density adjustment mode, the density is adjusted by a copy density lever 207. The density level determined in the manual or automatic density adjustment mode is inputted as a pulse width level to a bias output unit.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is capable of quickly switching between automatic density adjustment and manual density adjustment using a density adjustment switching means to select the desired density. The present invention relates to an image processing device.

[Prior art and its problems]

Recently, copying machines have been developed that have a function of determining the density of the original image and automatically controlling the exposure shortness or developing bias to obtain a copy with an appropriate image density. In order to.

The document scanning process, which is not an actual copying operation, is essential. For this reason, it was not possible to change from manual mode bg"IE to automatic density adjustment during copying.Also, if the density was incorrect while copying multiple sheets using Wi-a-mode However, there were drawbacks such as having to stop copying and switch to automatic density adjustment mode, or manually adjust the edge volume for the first few copies.

[Purpose of the invention]

This invention has been made to eliminate the above-mentioned drawbacks, and by providing a density adjustment switching means, it is possible to switch the density adjustment rejection mode from manual to automatic regardless of whether or not copying is in progress. The purpose is to

This invention will be explained below.

[Implementation side]

Figure 1 is a schematic cross-sectional view showing an embodiment of the image processing device based on this understanding, Figure 2 is a front view of the operation panel, and Figure 3
The figure is also a control circuit diagram.

In FIG. 1, 101 is the main body, 102 is a document cover, 103 is an operation unit, IIA document table gantry 04 is a document exposure lamp, 105a to 105d are reflective mirrors, 106 is a zoom lens for variable magnification, and 107 is a heat exhaust fan for, 108
1 is a photosensitive drum, 109 is a cleaner, 110 is a charger, 1
11 is a blank exposure lamp; 112 is a developing device; 113
is a paper feed cassette, 114 is a transfer charger, 115 is a transfer μ
116 is a conveyance roller, 111 is a fixing device 118
119 is a copy sensor, 12o is a registration roller, 121 is a light receiving sensor, and 122 is a power switch. The copying process of this copying machine is not much different from that of conventional machines, so the details will be omitted.

In the operation panel shown in FIG. 2, 2 (11 is a copy start key, 202 is a clear/stop key.

203 is a numeric keypad for setting the number of copies; 204 is a display that displays the status of the copying machine, such as jam, out of paper, toner replenishment, and control counter check; 205 is a display that also displays the copy number 1 magnification and abnormality; -206 is self””!
111/Manual Copy # Fine Adjustment key, 207 is a copy density bar, 208 is a copy density correction V bar that corrects the proper position of the copy density V bar 207, 2o9 is a 7-degree key for equal size copying, and Used to select magnification mode.

Reference numeral 210 is a variable size copy mode selection key, and 211 is a copy magnification display key. When pressed, the lower two digits of the selected magnification are displayed on the display 205. 212 to 215 are fixed copy magnification mode indicators, and 216 is a stepless copy magnification mode indicator. A desired magnification mode can be selected by repeatedly pressing the variable magnification copying mode selection key 21o'Lk, that is, by switching the display from 212 to 213, 214°, 215.2j6 in response to the press. Note that the variable size copy mode selection key 210 may be provided with an auto-repeat function so that the display changes while being pressed. 217 is a stepless magnification/bar, and when stepless magnification is selected, an arbitrary magnification is set using this stepless magnification change bar 217. Note that the scaling ratio is 65 to 142%. 218 is a magnification scale, stepless 1ilf variable magnification number 21
It corresponds to position 1.

219 is a main/wait indicator, which blinks during wait and lights up during standby. 220 is an automatic density adjustment mode indicator, and 221 is a manual density adjustment mode indicator.

i 3 Figure f) j1i According to the control circuit diagram, 301.3
'02゜303 is a one-chip microcomputer (hereinafter referred to as MP), MP301.302 performs DCC controller control, in particular, MP301 performs signal processing such as manual input of one key on the operation panel, and MP302 performs sequence control of the copying machine. I do. MP303 performs flit control of the DC motor. PA O in each MP.

PAD, ... is an input or output port, RES
E〒 represents a recent terminal, and lNTl represents an interrupt input terminal.

Next, for the signal input or output to each port, fj
I will simply explain. ZCR is zero cross detection signal, MR8
T is the main motor reset control signal.

) ITl is the main heater control signal, HT2 is the solar heater control signal, BS is the density adjustment output number that controls the developing bias, SSE is the number for sorter set 1, SST is the sorter standby signal, DTP is the tip of source 11 Detection signal, P
P is the paper feed detection signal, LP is the exposure lamp phase control signal, TH is the temperature detection signal of the thermistor of the heater, LM
ON is the exposure lamp monitor signal, TREST is the toner presence/absence detection signal, DNAE is the document density detection signal for copying, D
NVRI.

DNVR2 is a signal indicating the state of the manual copy speed lever 207 and the copy density correction lever 208, respectively.

DNZM is a signal indicating the status of stepless magnification V bar, KEY
is a signal indicating the state during key manual or mechanical adjustment, DS
P is a signal to the display, VTN is 'am' for detecting remaining toner,
MP 302ZMHP is home position detection of zoom lens (i number, DSCHJ is paper jam detection signal, 5P
RJ is separation jam detection No. 4M, HP is document platen home position detection signal, STJ is soda jam detection signal, ZM
1 and 2M2 are signals that indicate the position of the zoom lens, CNT is a number counter signal, 0PBR is a signal that stops the return of the optical system (complementary), HTSH is a 0N10FF control signal when the heater is abnormal, and THMIN is the thermistor signal. Signals input to the disconnection RAM memory, BL is a blank exposure control signal, 0PBF is a signal that instructs the optical system to move forward or backward, 0PCL is a 0N10FF control signal for moving the optical system, REG is a V-syst ρ-RA control signal, and FDP is a signal input to the disconnection RAM memory. Paper feed timing control (fi number, MMSYC is synchronized with the main motor), signal to control the static elimination of the separation belt section, and pre-exposure, SQL is the lower stage paper feed V node control signal, BS
CL is the developing bias 0N10FF control signal, HVT is the high voltage power supply control signal, DCK is the drum clock, THMO
UT is the signal output from the thermistor's breaker memory, T
CNT is total counter abnormality detection signal, REGADJ
is V-syst timing adjustment number, LAL is LED7V
A control signal, MP3030PUN is the drive motor of the optical system, and P-V key.

Forward, backward, 0N10FF control abnormality diagnosis No. 16, F
S is the magnification reference frequency, MCUT is the motor abnormality stop signal, OPM is the optical motor control standard No. 16 for creating the pulse speed control signal FV (described later), DRM is the drive motor control signal, and FV is the constant width pulse speed control. signal, PC is the phase control signal, OPMON is the optical motor control monitor signal, F
G is the optical motor encoder signal, LCKP is the ptsuk phase display signal, OFF is the optical motor filter switching signal, R
8T1-3 are reset signals for MPs 301-303, respectively, SI is a serial communication input, so is a serial communication output, SCK is a serial communication clock, 5PER is a serial communication enable signal, and 5RDY is a serial communication acceptance signal. Also, CLKI~3 is MP301~30, respectively.
3 reference clock.

Next, the switching operation for density adjustment in the above embodiment will be explained with reference to the drawings.

In Figure 2, automatic/manual copy density adjustment switch key 2
By pressing 06, the automatic density adjustment mode display 22
0'4 can be turned on or off. Further, when the automatic density difference mode indicator 220 is lit, it indicates that the automatic density 'FA adjustment mode is selected, and the automatic density d! When the I adjustment mode display 220 is off, the manual adjustment mode display 221 lights up and the manual adjustment mode display 221 lights up.
Indicates that the mode is density adjustment mode. In the manual pIjJJ density adjustment mode, the copy density bar 207 adjusts the density. The density level determined by the manual density adjustment mode or the automatic density adjustment mode is input to the bias output unit (B) to be described later as a pulse width signal of the density adjustment output signal BS of the MP301 shown in FIG. In the manual density adjustment mode, the potential of the copy density bar 207 is the A/D of MP.
DNVR] signal from the input terminal.

The pulse width corresponding to the potential novel is determined. In automatic density adjustment mode, the leading edge of the original is detected by DTP.
From the timing when is input, zoom lens 10 for variable magnification
Amount of light entering the light receiving sensor 121 provided at 6 7 A DNAE signal is input to the A/D input terminal as the original density detection input of the MP 301 shown in FIG. 3, the amount of light is determined, and the pulse width corresponding to the amount of light is calculated. The control described above (7) is always performed by the MP, and the automatic/manual copy density adjustment switch key 2
Depending on the state of 06, the pulse width in each case is output as the density adjustment output signal BS.

Next, an explanation will be given of the oscillation detection operation in the automatic bounce mode.

Figure 4 is an explanatory diagram showing the mass detection machine, and the number is 1st.
Shows the same thing as the figure.

In this figure, A is an exposure point, B is a bias output unit that adjusts the toner a level, and changes the bias value according to the exposure density to determine the density. That is, an original exposure lamp 104 for one original set on the operation unit and the original table 103 is used.
Exposure to light and the reflected light? Light is received by the light receiving sensor 121, and the toner specularity to be transferred to the zero drum 108 is adjusted according to the amount of light by the bias value of the high speed output unit B.

Next, with reference to the flowcharts in FIGS. s (a) and (b), the proper concentration control system in the self-MJJJI 21 degree adjustment mode will be explained. Note that flows (a) to (b) are called by a CALL instruction of the main program and executed at will. Also, (11, tz)...
・Represents Tani Sdepp.

Fp- shown in Fig. 5(a) starts in the automatic quality adjustment mode, adds 1 (]) to whether or not copying is currently in progress, and Y
If it is ES, it will indicate whether the original A4 detection signal DTP has been input or not. Calculate the corresponding pulse width 3)
, furthermore, D N A E indicating the original uji detection input,
Calculate the pulse width corresponding to in using the fi number 4),
Back to the main routine. On the other hand, if the determination in step (]) and step (2) is No, the process immediately returns to the main routine.

The 7 μm shown in Fig. 5(b) starts at the end of the copy operation, and first determines whether the automatic density adjustment mode is in effect 11), and if YES, outputs the pulse width determined in step (4) 12) Return to main routine. On the other hand, No.
If so, output the pulse width determined in step (3) and return to the main routine (03).

[Effect between lights]

As explained above, automatic density level adjustment and manual density adjustment can be switched arbitrarily by the production level adjustment switching means, so it is possible to switch from automatic density level adjustment to manual production mode, which was previously impossible. It has the advantage of being able to reduce wasted paper due to poor paper thinning to 70% and reduce maintenance costs for copying.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing an embodiment of an image processing apparatus according to the present invention, FIG. 2 is the same (a front view of the operation panel, FIG. 3 is a control circuit diagram, and FIG. 4 is an explanation showing the light amount detection mechanism). 5A and 5B are flowcharts for explaining the operation. In the figure, 101 is the main body, t02 is the document table cover, 103 is the operation unit and document table, and 104 is the document image lamp. , 10
8 is a photosensitive drum, 113 is a paper feed cassette, 119 is an image tip sensor, 201 is a copy start key, 202 is a clear/stop key, 203 is a numeric keypad, 204, 205 is a display, 206 is an automatic/manual copy density adjustment switch Key,
207 is copy density/bar, 208 is copy density correction V
bar, 209 is the same size copy mode key, 210 is the variable magnification handling mode selection key, 211 is the copy magnification display key, 212 -
215 is a fixed copy magnification mode display, 216 is a stepless copy magnification mode display ≠, and 211 is a 11. J stage 7 no. 121Bl magnification scale, 219 twin/weight indicator, 220 & automatic density adjustment mode indicator, 221 manual density adjustment mode indicator, 301 to 303 MP, P
A.O., P.A.I. ... is an input or output port, RESETj'
! The reset terminal, lNTl, is an interrupt input terminal.

Claims (1)

[Claims] In an image processing apparatus equipped with two copy image density adjustment means, a density adjustment means using a variable resistor and a density adjustment means that determines the original image density and uses the result, the two density adjustment means are arbitrarily switched. An image processing device characterized by being provided with density adjustment switching means.