JP2011113341A - Electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve an electronic apparatus having a liquid-crystal display panel, regarding an operating error caused by deterioration in responsiveness to display switching control in the low-temperature environment of the liquid-crystal display panel without using a heating means such as a heater. <P>SOLUTION: The electronic apparatus includes an input means, a control means, and a liquid-crystal display means, and also includes a temperature sensor for detecting at least the ambient temperature of the liquid-crystal display means and outputting temperature data that match the ambient temperature. When the input means is operated a plurality of times in a continuous and repeated manner within a predetermined period of an acceptance standby time preset according to the temperature data, regarding operation data corresponding to repeated operations which are repeated by not more than a preset number of times of repetition, the control means generates control data corresponding to the operation data and outputs display data to the liquid-crystal display means, and neglects operation data so that operations are repeated in excess of the preset number of times of repetition, thereby performing the control of not accepting the next operation data until the period of acceptance standby time elapses. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for improving the operability of a liquid crystal display used in a low temperature environment.

A liquid crystal display provided in an electronic device such as a portable wireless communication device displays information such as a communication frequency and a communication channel, information such as a volume and a signal intensity, and the like.
When one of the operation keys provided in the electronic device, for example, a communication channel change key is operated, information displayed on the liquid crystal display according to the operation, in this case, communication The numeric display indicating the channel is configured to change.

However, a liquid crystal display panel such as a TFT used in a liquid crystal display has a problem of a response speed that a response speed of a screen display is greatly reduced under a low temperature environment such as −10 ° C. or −20 ° C.
For example, in an environment of 0 ° C. or higher, there is a problem that even if the response speed is 50 ms or lower, the response speed is reduced to 150 ms or higher at −10 ° C. or lower.

As described above, when the response speed of the liquid crystal display panel decreases, the operation of the electronic circuit and the operation of the liquid crystal display section are deviated because the other electronic circuits in the surrounding area hardly change in response speed to temperature changes. This can cause the following erroneous operations.
For example,
When changing the communication channel from 1 channel to 25 channels,
When the temperature of the external environment is + 10 ° C., the response speed of the internal electronic circuit is negligible, and the response speed of the liquid crystal display panel is as fast as about 20 ms.
When the channel up key is pressed once, the display information immediately changes from channel 1 to channel 2.
Therefore, the user repeatedly presses the channel up key several times in succession to confirm the display information, and immediately before the display information reaches the desired 25 channel, the user presses the key once to set the 25 channel. A continuous push operation of setting is possible.

However, when the temperature of the external environment is, for example, −10 ° C., the continuous pressing operation cannot be performed.
That is, when the channel up key is continuously pressed several times, control data for changing display information is output from the internal electronic circuit to the liquid crystal display panel one after another, but the response speed of the liquid crystal display panel is about 150 ms. Since the display information is lowered, the display information is not sequentially changed smoothly, and the display state becomes invisible.
Therefore, if the key is continuously pressed several times, it may be erroneously set to a channel that greatly exceeds 25 channels.
Therefore, if the channel down key is continuously pressed this time to return to the target 25 channels, the 25 channels may be passed and the channel may be lowered too much.

In order to avoid such erroneous operations, press the channel up key once to release the finger, confirm that the display information has changed from channel 1 to channel 2, and then press the channel up key once again to release the finger. Release and confirm that the display information has changed from channel 2 to channel 3, and then perform the following operation. In this way, a troublesome operation of repeating until the desired 25 channels are displayed is necessary.
Thus, when the external environment is a low temperature, there is a problem that the operability is deteriorated due to a decrease in the response speed of the liquid crystal display panel.

  In order to deal with the problem of the temperature characteristic of the contrast that the contrast of the liquid crystal display panel changes depending on the temperature, Patent Document 1 includes a temperature sensor such as a thermistor, and the light source unit of the backlight of the liquid crystal display panel A technique for controlling the applied voltage is disclosed. Although this technique can cope with a change in contrast temperature characteristic, it cannot cope with a temperature characteristic of responsiveness to display switching control.

  In order to improve the decrease in responsiveness to the display switching control in the low temperature environment of the liquid crystal display panel, it is possible to use a temperature detecting circuit and a heating means such as a heater as described in Patent Document 2, Since there is a problem of space for arranging the heating means of the liquid crystal display panel and another problem that requires energy such as electric power for operating the heating means, the method of using the heating means is Not realistic.

Japanese Patent No. 3514946 Japanese Utility Model Publication No. 56-128618

An object of the present invention is to improve an erroneous operation caused by a decrease in responsiveness to a display switching control in a low temperature environment of a liquid crystal display panel without using a heating means such as a heater.

An electronic device according to claim 1 of the present invention is provided.
An input means for a user to operate and input operation data;
Control means for generating control data based on the operation data;
In an electronic device comprising liquid crystal display means for displaying a predetermined display pattern based on the control data,
A temperature sensor that detects at least the ambient temperature of the liquid crystal display means and outputs temperature data corresponding to the ambient temperature;
The control means includes
When the input means is repeatedly operated a plurality of times within a predetermined reception waiting time set in advance according to the temperature data,
For operation data corresponding to a repetitive operation equal to or less than a preset number of repetitions, control data corresponding to the operation data is generated,
Ignore operation data that has been repeatedly operated over a preset number of repetitions,
Control is performed such that the next operation data is not accepted until the acceptance waiting time elapses.
In claim 2,
The control means includes
Only when the input temperature data is less than the temperature corresponding to the set temperature,
The control of not accepting the next operation data until the acceptance waiting time elapses,
If the input temperature data is higher than the temperature corresponding to the set temperature,
Even within the reception waiting time, the next operation data is received.
In the electronic device according to claim 3,
The control means includes
Output means for outputting acceptance waiting time data corresponding to the input temperature data;
According to the reception standby time data output from the output means, the reception standby time of the operation data input from the input means is controlled.
In the electronic device according to claim 4,
The output means includes
For each input temperature data, a data table in which reception waiting time data corresponding to the temperature data is stored correspondingly, and
Data reading means for reading and outputting the corresponding reception waiting time data with reference to the data table for each input temperature data.

According to the electronic device of the first aspect of the present invention,
An input means for a user to operate and input operation data;
Control means for generating control data based on the operation data;
In an electronic device comprising liquid crystal display means for displaying a predetermined display pattern based on the control data,
A temperature sensor that detects at least the ambient temperature of the liquid crystal display means and outputs temperature data corresponding to the ambient temperature;
The control means includes
When the input means is repeatedly operated a plurality of times within a predetermined reception waiting time set in advance according to the temperature data,
For operation data corresponding to a repetitive operation equal to or less than a preset number of repetitions, control data corresponding to the operation data is generated,
Ignore operation data that has been repeatedly operated over a preset number of repetitions,
Since it is configured to perform control of not accepting the next operation data until the acceptance waiting time has elapsed,
When the ambient temperature decreases, the operation data reception waiting time becomes longer, and the time during which the next operation data is not received becomes longer. Therefore, during the reception waiting time, even if the input means is operated continuously more than the number of repetitions, operation data exceeding the number of repetitions is not received and is not reflected in the control data. Therefore, since the switching of the display on the liquid crystal display means is delayed in a low temperature environment, it is possible to prevent an erroneous operation in which excessive operation data is input by repeating the same operation.
In claim 2,
The control means includes
Only when the input temperature data is less than the temperature corresponding to the set temperature,
The control of not accepting the next operation data until the acceptance waiting time elapses,
If the input temperature data is higher than the temperature corresponding to the set temperature,
Since it is configured to accept the next operation data even within the acceptance waiting time,
When the temperature is lower than the set temperature, the erroneous operation can be prevented,
When the temperature is equal to or higher than the set temperature, the operation data is quickly reflected in the control data, and excellent responsiveness is obtained.
In claim 3,
Since the reception standby time of the operation data input from the input means is controlled according to the reception standby time data corresponding to the input temperature data, the operability according to the temperature change is obtained.
In claim 4,
For each input temperature data, by providing a data table in which reception waiting time data corresponding to the temperature data is stored correspondingly,
By simply referring to the data table, the reception standby time corresponding to the temperature data can be obtained, so that the configuration of the control means can be simplified.

It is a block block diagram of the portable radio | wireless communication apparatus as embodiment of the electronic device which concerns on this invention. It is a flowchart of the input control program in the control part of the said portable radio | wireless communication apparatus. It is explanatory drawing which shows an example of the response speed data table in the control part of the said portable radio | wireless communication apparatus.

  In the following, as a mode for carrying out the present invention, a portable wireless communication device according to a first embodiment of the present invention will be described in detail.

In FIG. 1 which shows the block diagram of the portable radio | wireless communication apparatus of Example 1,
Reference numeral 1 denotes a portable wireless communication device according to an embodiment of the present invention, which includes a transmission unit T and a reception unit R, and further includes a liquid crystal display unit 2 for displaying various types of information, and the portable wireless communication device 1. Control various functions of the portable wireless communication device 1 based on an operation unit 3 having a plurality of operation keys 31 for inputting operation information necessary for controlling various functions, and a control program to be described later. The control part 4 provided with CPU41 for doing is provided.
Reference numeral 5 denotes a temperature sensor disposed in the vicinity of the liquid crystal display unit 2.
In the memory 42 built in the CPU 41, a control program for controlling the entire portable wireless communication device 1 and necessary data are written. The control program includes an input control program to be described later and a response speed data table.
The portable wireless communication device 1 corresponds to the electronic device described in the claims,
The liquid crystal display unit 2 corresponds to the liquid crystal display means described in the claims,
The operation unit 3 corresponds to input means described in claims,
The control unit 4 corresponds to control means described in the claims.

When any one of the keys 31 is operated, the operation information is input to the control unit 4, and the control program controls each unit of the portable wireless communication device 1 according to the input operation information. In response, various information is displayed on the liquid crystal display unit 2.
For example, in the reception mode, the liquid crystal display unit 2 displays various data such as the current reception channel, signal strength, and radio wave format.
For example, when changing the reception channel, if any one of the corresponding keys 31 is operated, the operation information is input to the control unit 4, and the control program responds to the input operation information. The channel control data for changing the reception channel in the reception unit R of the portable wireless communication device 1 is output to the reception unit, and the display control for changing the channel data displayed on the liquid crystal display unit 2 Data is output to the liquid crystal display unit 2.

In the case of a liquid crystal display panel used in the liquid crystal display unit 2, for example, a TFT liquid crystal display panel, the response speed of screen display is greatly reduced in a low temperature environment such as −10 ° C. or −20 ° C. as compared with normal temperature. Since there is a problem, the operation of the control unit 4 and the operation of the liquid crystal display unit 2 are deviated, causing the above-described erroneous operation.
Therefore, in the present invention, at a low temperature, during the predetermined wait time after the first operation information is input, reception of operation information corresponding to continuous operations is limited, and the response speed to the key input is apparent. Control to slow down.
For this purpose, the temperature sensor 5 is provided as shown in FIG. 1 and a response speed data table as shown in FIG. 3 is built in the control unit 4 to accept operation data for the second and subsequent times depending on the ambient temperature. The waiting time for acceptance (hereinafter referred to as “wait time”) is changed.
In order to control the luminance of the liquid crystal display unit 2 according to the change in the ambient temperature, the temperature sensor 5 is used to detect the change in the ambient temperature and control the luminance at the low temperature.

  In the portable wireless communication device 1 configured as described above, the control unit 4 has the input control program as shown in FIG. 2 and the control unit 4 shown in FIG. 3 in order to change the wait time according to the ambient temperature. Such a response speed data table is written.

The program will be described below with reference to the flowchart shown in FIG.
When the power is turned on in step S1,
In step S2, temperature detection is started by the temperature sensor 5. In step S3, the detected temperature data is taken into the control circuit 4 and compared with the set temperature T0. If the detected ambient temperature is lower than the set temperature T0, the process proceeds to step S4. Proceed to step S12.
Only when the temperature is lower than the set temperature T0, the acceptance of the operation input of the channel up key or the channel down key of the operation unit 3 is controlled.
Further, when the ambient temperature is equal to or higher than the set temperature T0, it is sufficiently warm, so that the operation for restricting the acceptance of the key operation input is omitted.
The set temperature T0 is set to 25 ° C., for example.

  In step S4, the presence or absence of operation of either the channel up key or the channel down key of the operation unit 3 is checked, the presence or absence of operation data is checked, and either the channel up key or the channel down key is operated. If the operation data corresponding to this is input, the process proceeds to step S5, and if not operated, the process returns to step S2.

In step S5, the correction mode is entered, and correction data D corresponding to the detected temperature data is read from the response speed data table written in the memory 42.
From the response speed data table, the ambient temperature is, for example,
When the temperature is 0 ° C. or higher, 0 (mS) is read as the correction data D.
In the case of −10 ° C. or more and less than 0 ° C., 100 (mS) is read as the correction data D,
When the temperature is −20 ° C. or higher and lower than −10 ° C., 300 (mS) is read as the correction data D,
In the case of −30 ° C. or more and less than −20 ° C., 400 (mS) is read as the correction data D,
If it is less than −30, 500 (mS) is read as the correction data D.
These correction data D correspond to the reception waiting time data described in the claims.

In step S6, the time counting by the timer for measuring the elapsed time is started and the operation number counter N is set to the initial value 1.
Subsequently, in step S7, the operation data input based on the key operation in step S4 is converted into corresponding control data, and the channel setting value is changed according to the control data. For example, when the key operation in step S4 is the channel up key, the control data is used to increase the channel setting value by one step. In the case of the channel down key, the control data is used to decrease the channel setting value by one step. Based on these control data, the channel of the transmission unit T or the reception unit R is switched.
Subsequently, in step S8, as in step S4, the presence or absence of operation of either the channel up key or the channel down key of the operation unit 3 is checked, and if it is operated, the process proceeds to step S9 and is operated. If not, the process proceeds to step S12, and normal operation is started on the channel based on the changed channel setting value.

In step S9, the operation counter N is compared with a preset repetition count M. If the repetition count is less than M, the process proceeds to step S10. If the repetition count is M or more, the process proceeds to step S13.
The number of repetitions M is registered in advance as M = 3, for example, but the user can set it according to his / her preference. When the number of repetitions M is exceeded, the operation of the channel up key or the channel down key is ignored.
In step S10, the operation number counter N is incremented by 1, and the process proceeds to step S11. In step S11, the channel setting value is changed based on the key operation in step S8. If the key operation in step S8 is, for example, a channel up key, the channel setting value is increased by one step, and if it is a channel down key, the channel setting value is decreased by one step.
Then, it progresses to step S12 and starts normal operation | use with the channel based on the changed channel setting value.

In step S13, the elapsed time by the timer started in step S6 is compared with the correction data D read in step S5. If the elapsed time is less than the time indicated by the correction data D, the process proceeds to step S14. The user is informed that the operation input is not currently accepted (input invalid state) by turning on an indicator such as an LED.
If the elapsed time is equal to or longer than the time indicated by the correction data D, the changed channel setting value is displayed on the liquid crystal display unit 2, and if the indicator is lit, the indicator is turned off, and step S2 The process returns to the state of waiting for the input of the channel up / down key again.

The number of repetitions M is the number of times of accepting an operation of repeatedly inputting the same operation key, so-called preceding input. When M = 1 is set, once input from the operation key is performed, the second preceding input is not accepted until the time indicated by the correction data D elapses. From the viewpoint of preventing erroneous operation, such a setting can sufficiently solve the problem. However, in consideration of operation time and operability, the channel up / down key, etc., for example, up to about 3 times as described below. It seems that the setting to accept the preceding input is appropriate.
For example, assuming that the channel is changed from the 001 channel to the 004 channel in a low-temperature environment of several tens of degrees below freezing which takes about 1 second in response characteristics in the liquid crystal display unit, M = 1 is set ( If you do n’t accept multiple previous entries,
Press the channel up key once and then wait for about 1 second until the display switches from 001 to 002,
After confirming that the display has been switched to the 002 channel, press the channel up key once again, and then wait for about 1 second until the display is switched from the 002 to the 003 channel.
After confirming that the display has been switched to 003 channel, it is necessary to press the channel up key once again, and then wait for about 1 second until the display is switched from 003 to 004 channel. It takes 3 seconds in total to confirm this.

In the case of the electronic apparatus of the present embodiment, if the setting is made to accept three preceding inputs as the number of repetitions M,
When the channel up key is pressed three times, the control data is almost instantaneously increased by three steps to become data corresponding to the 004 channel, and the display data is also almost instantly increased by three steps to become data corresponding to the 004 channel. It is output to the display unit 2. In the liquid crystal display unit 2, it takes about 1 second until switching to the display corresponding to the 004 channel. Therefore, after about 1 second, it can be confirmed that 004 channel is displayed.
In other words, when M = 1 is set, it takes only 1 second to confirm the switching of the display, but it can be shortened to 1 second, so that the time can be shortened and excellent operability can be obtained.
If the operation is repeated four times or more, the operation of three times or more is ignored, and in step S14, it is determined that an operation input is not currently accepted (input invalid state). Since the user is informed by lighting, an erroneous operation can be prevented.

In this way, when the ambient temperature is lower than the set temperature, the key operation from the first key operation until the acceptance waiting time (wait time) corresponding to the ambient temperature elapses is limited. Therefore, it is possible to prevent an erroneous operation in which the same key operation is repeated many times and excessive operation data is input.
The set temperature T0, the number of repetitions M, and the numerical data in the response speed data table are only examples, and those previously written at the time of shipment from the factory may be used, but the user can rewrite them. It is good.
In the above embodiment, when the ambient temperature is equal to or higher than the set temperature T0 when the power is turned on, the key operation input reception control such as reading of the correction data D is not performed by not performing the reception control of the key operation input. Although the processing necessary for the reception control can be omitted, the set temperature T0 is not provided, the processing of step S3 for comparing the ambient temperature with the set temperature T0 is omitted, and the correction data D corresponding to the ambient temperature is always read. It is good.

Further, instead of the response speed data table, it is also possible to use conversion means such as function conversion means for outputting acceptance standby time data corresponding to temperature data.
Further, the temperature sensor provided for compensating the temperature characteristic of luminance in the liquid crystal display unit 2 is also used as a temperature sensor for obtaining temperature data in the present invention, thereby suppressing an increase in hardware cost. Can do.

In the above-described embodiment, the channel up key and the channel down key have been described as an example of the function of the key 31 of the operation unit 3. However, many examples of the function key that accepts preceding input within a plurality of repetitions. As examples, there are an up / down key for volume, an up / down key for squelch control, and an up / down key for brightness adjustment (dimmer adjustment) of the liquid crystal display unit 2.
However, you can select on / off, such as a dual watch function on / off switch key, a monitor function on / off switch key to forcibly open a squelch, or a secret function on / off key. For keys to be performed or keys that are structurally difficult to perform a plurality of key operations in a short time, such as a toggle switch, it is desirable to accept only one operation within a predetermined reception waiting time.

In various electronic devices provided with a liquid crystal display portion, it can be widely used for improving operability.

DESCRIPTION OF SYMBOLS 1 Electronic device, Portable radio | wireless communication apparatus 2 Liquid crystal display means, Liquid crystal display part 3 Input means, Operation part 4 Control means, Control part 5 Temperature sensor 42 Memory, Response speed data table

Claims (4)

An input means for a user to operate and input operation data;
Control means for generating control data based on the operation data;
In an electronic device comprising liquid crystal display means for displaying a predetermined display pattern based on the control data,
A temperature sensor that detects at least the ambient temperature of the liquid crystal display means and outputs temperature data corresponding to the ambient temperature;
The control means includes
When the input means is repeatedly operated a plurality of times within a predetermined reception waiting time set in advance according to the temperature data,
For operation data corresponding to a repetitive operation equal to or less than a preset number of repetitions, control data corresponding to the operation data is generated,
Ignore operation data that has been repeatedly operated over a preset number of repetitions,
An electronic apparatus configured to perform control such that next operation data is not accepted until the acceptance waiting time has elapsed.
The control means includes
Only when the input temperature data is less than the temperature corresponding to the set temperature,
The control of not accepting the next operation data until the acceptance waiting time elapses,
If the input temperature data is higher than the temperature corresponding to the set temperature,
The electronic apparatus according to claim 1, wherein the next operation data is received even within the reception waiting time.
The control means includes
Output means for outputting acceptance waiting time data corresponding to the input temperature data;
3. The electronic device according to claim 1, wherein the reception standby time of the operation data input from the input unit is controlled according to the reception standby time data output from the output unit. 4. apparatus.
The output means includes
For each input temperature data, a data table in which reception waiting time data corresponding to the temperature data is stored correspondingly, and
4. The electronic apparatus according to claim 3, further comprising: a data reading unit that reads and outputs the corresponding reception waiting time data with reference to the data table for each input temperature data.

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