JPS6223058A - Display device for image forming device - Google Patents

Abstract

PURPOSE:To display data by a conventional key input means and to obtain a one-touch switch function without any malfunction by mounting a flat panel sensor on the surface of a display part. CONSTITUTION:A transparent electrode 103 is arranged as the panel sensor on a display operation part 1-5 and when it is touched at a position 1a, a relative display appears on a line 1-2 as shown by 2a-2c. An analog switch 102 is placed on the side of output ports O0-O12 of a computer 101 and variation in the capacity of the transparent electrode 103 is detected by A/D input detection. Signals of the output ports O0-O12 are A/D-inputted successively in 5msec with a key input, read, and stored in a corresponding memory. The total value of the memory is divided by the frequency of A/D input and the center value is subtracted. The result is used as a new threshold value to compare the contents of memories, thus making a key input check. This structure allows proper key input operation and eliminates the malfunction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an image forming apparatus, and particularly to control of a display operation section.

[Prior art]

2. Description of the Related Art Conventionally, a display device of an image forming apparatus is provided with a keyboard as an input means, and is independently provided with a display section that outputs outputs set by inputs from the keyboard and other warnings. In recent years, functions such as operability have been improved in such devices, and in particular, digital image processing devices have become capable of various processing as an output method for image formation.

However, in order to specify such processing, key human power means at least equivalent to the processing means is required, which not only occupies the space of the device, but also has poor operability and increases costs. ing. Furthermore, in the future, users will request expansion of functions, and if the number of manual means is increased each time, the operability will deteriorate and the device will become a device that does not meet the user's requirements. In order to suppress the increase in the number of key manual operations, it is possible to consider a method of solving this problem using a combination of existing key manual operations, but this has the disadvantage that the operability becomes even worse.

On the other hand, in the current situation where flat operation sections are becoming more and more popular, manual key means also have the problem that the input section and the output display section are often operated by mistake.

〔the purpose〕

The present invention was made in view of the paper situation, and in order to eliminate these conventional drawbacks and improve the interaction of key human power means, a transparent flat panel sensor is mounted on the surface of the display section. By doing so, the purpose is not only to enable display of conventional key manual means on the display section, but also to enable the function to be executed by touching the surface of the display.

The display has a display change mode (menu selection), and by touching the mode, the display changes to a display means that can be manually operated with a key having another function. Furthermore, there is a priority mode for setting the display unit override key, and the priority mode can be changed arbitrarily depending on the operating state of the image forming apparatus. That is, it has a priority mode at power-on (wait time), standby, copy start, copying, post-rotation, etc.

In other words, according to the present invention, since the priority mode is set according to each state, it is possible to save the trouble of manually searching for the predetermined display change mode. Although it is possible to select a change mode, if a certain operating state continues for a predetermined period of time, it is also possible to automatically return to the priority mode of that state.

Furthermore, when the present invention uses a touch panel sensor that detects changes in stray capacitance by the user's hand in the input operation, sweat and oil adhering to the sensor, environmental conditions such as outside air, etc. It has a considerable effect on operation.

Therefore, the present invention aims to reduce the change in stray capacitance given to senna by A/
D change is detected and the threshold level of 0N10FF for key manual power is changed to provide appropriate key manual power means and to prevent erroneous operation.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a display device of this embodiment, in which a display operation section 1-5 according to the present invention is located in the lower region. In this area, the operating section 1 is provided to perform the same function as the key manual operation.
-5, a transparent electrode 103 is arranged as a panel sensor corresponding to each display, and in this embodiment, a liquid crystal panel display is used.

In this example, the display rNIl! iXT OH
OIOgJ is used to switch to an instruction mode not shown in the display, and display rRESgTJ is used to switch to an initial setting state (1! setting mode when power is turned on).

Next, a typical copying operation procedure will be described.

1-1 shows the initial instruction mode, and when you touch the cassette selection Jla position, the cassette selection display appears as shown in mode 1-2:
2a, ``Lower row and paper size'' 2b, rAUTOJ2c mode in which a cassette is selected according to the original size. This makes it possible to select the cassette position, but it is also possible to select the reduction ratio (magnification).
When you touch the 2d position, the "Enlargement (1
, 4-... magnification) J3a, r equal magnification J3b, r reduction (0,
8) J3c, r reduction (0,6) J3d, increasing magnification by zooming rZOOMupJ3e and decreasing magnification “Z
The instruction mode of OOMdownJ3f is displayed. This sets the cassette position and magnification.

Next, when setting the number of copies, touch the "number of copies" 3g position, the mode switches to mode I-4. Here, rNEXT 0HOIOEJ 4a is returned to rNBXT 0HOIOEJIb in the initial instruction mode I-1.
, roOPY sp-JIC becomes possible.

Display operation section 1-5[, in the state after copy start, "Stop key J5a is newly added and displayed."

FIG. 2 is a circuit diagram of the present invention.

+01t is a microcomputer with an internal A/D converter, and Oo~012 are output ports. The present invention connects the analog switch 102 to the output cap-)Oo~
By switching 012, the capacitance change of the transparent electrode +03 is detected by A/D input detection. That is, according to the present invention, the capacitance between the transparent electrode 103 and the ground is quite large, and the A/D output level is small at the output timing shown in FIG.

On the other hand, when a human body touches the transparent electrode 103, the capacitance can be sufficiently detected within the timing time, and the presence or absence of the switch is determined by A/D converting the input.

According to FIG. 3, there is a timing chart in which the transparent electrode 103 on the output of the output boat 02 has a switching operation. Also, in FIG. 2, there is a timer that generates a one-shot timer from O13, which is input to i3 to check the operation of the timer. Further follow! , is an input for determining whether the device is in wait mode or standby mode, and all inputs are at Hi level except during wait mode.

i+ is a signal for checking the well-known pre-rotation time period for pre-copy preparation cleaning of the photosensitive drum of the image forming apparatus and the post-rotation time period for cleaning the drum after copying, etc. , except during standby [, is at Hi level. .

Further, the copying signal 12 is a signal that indicates a Hi level only during copying (excluding the cases of backward rotation and forward rotation).

Based on the above, the control operation will be explained according to the flowchart shown in FIG.

As shown in FIG. 4, the priority mode according to this embodiment is MODEL during wait and MODEL during standby.
DEL, MODE 3 during forward rotation and backward rotation, M during copying
The ODE is set to 4. However, the aim of the present invention is not limited to these.

Here, each step of the flowchart is shown as S1 to S l Oaa.

First, when the power is turned on, the Sl determines whether the image forming apparatus is on standby (checking the input io) 0 If it is in wait at this time, 0 (Low level)
Therefore, it enters Sl, but since the timer is not working during the 9 eights when the power is turned on, it enters S2a to start the one-shot timer and set the MODEI. If there is no key power during input (checking A/D conversion), return to Sl. When there is key power, the mode is rewritten to the priority mode by the input, but after a predetermined time, the one-shot timer is started again to return to the priority mode, the mode is changed (S2c), and the process returns to Sl. Furthermore, if the one-shot timer has finished in SL, M
Enter S2b without setting ODEl.

After that, since I am on standby in Sl, I turn off the one-shot timer! = and proceed to S3 and S4. The reason why this timer is turned OFF is that when the timer is working and the standby state is entered, the steps from S4 to S5. S5b
This is because the priority mode of MODEL is not set.

In S4, it is determined whether forward rotation or backward rotation is being performed. If NO, proceed to S5; if YES, proceed to S6; however, if copying is not in progress, proceed to S7; if copying is in progress, proceed to S8. After turning off the one-shot timer, it is again determined in S9 whether copying is in progress.

The reason why the one-shot timer is turned off in S8 is that when the copying state is entered while the timer is working as described above, the priority mode of MODE4 is not set as the process progresses from S9 to SlO and 5lOb. Further, if the determination in S9 as to whether or not copying is in progress is NO, the process returns to 83. In addition, Jun ODg2 (85-85c).

MODEl3 (87~S7c), MODg4 (8
The operations of 10 to 510c) are almost the same as those of MODFJl and control the operation of the display panel, but individual explanations will be omitted. However, the process returns to S4 from S5c and S7c where the mode is changed, and returns to S9 from 5lOC to repeat the above control operation.

Furthermore, in the present invention, the key human power is the sixth
Checks are carried out as shown in the figure.

Note that S11 to S815 indicate each step of this flowchart.

First, when a key is input, all the output boats OO to 012 are turned on every 5 msec as shown in Fig. 3, and the output boat Oo is turned on first.
(811), and after 5m5ec (S11a), A/
A D input is performed (811b), and the converted digital value is read and set in the corresponding memory (2) and memory (1) (811C). Then the output boat Oo tto F
Becomes F (Slld).

Subsequently, the output port 01 is turned ON (812), and performs the same operation as in the case of the output port (S12a-8).
12d)a In this way, the total sum of memories ■ to memory ◎ is stored in memory l, the total sum of the memory is divided by the number of A/D inputs, and the center value (7F)H is subtracted (814). This becomes a new threshold, and further compares memory ~ memory 0 with this threshold to check the switch, that is, key input (8
15).

〔effect〕

As explained above, the present invention provides a panel sensor in at least a part of a predetermined area of a display device, A/D converts the output from the panel sensor, calculates the average value of the converted values, and calculates the average value of the converted values. Since the value obtained by subtracting a predetermined value from the key is set to the threshold level, the threshold level of 0N10FF of the key manual power can be changed, providing an appropriate intermediate manual power means and preventing malfunctions. There is.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a display operation section of an embodiment of the present invention;
FIG. 2 is a circuit diagram, FIG. 3 is a timing chart of the output port, and FIG. 4 is an explanatory diagram showing the priority mode.
Fig. 1 is a flowchart showing the control operation of the display device;
FIG. 6 is a flowchart showing the operation of checking key human power. 1-1 Initial instruction mode 1-2 Setting mode 1-3 Setting mode 1-4 Setting mode 1-5 Display operation section 108 Transparent electrode Figures 2 and 4 MODE 1 (Sounds warm) Wait mode
2 (S(1>l)) MODE 3 (Previous movement clear, destruction rotation dark) MODE 4 (Copying)

Claims (1)

[Claims] A panel sensor is provided in at least a part of a predetermined area of the display device, the output from the panel sensor is A/D converted, and the average value of the A/D converted value is taken and a predetermined value is determined from the average value. A display device for an image forming apparatus, characterized in that a value obtained by subtracting .