CN101316317B

CN101316317B - Method for relieving child lock of television through keying plate

Info

Publication number: CN101316317B
Application number: CN2008100678349A
Authority: CN
Inventors: 孙雷
Original assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Current assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Priority date: 2008-06-13
Filing date: 2008-06-13
Publication date: 2010-07-21
Anticipated expiration: 2028-06-13
Also published as: CN101316317A

Abstract

The invention discloses a method for unlocking a TV childlock through a key control board, which comprises the steps: two keys on the key control board are chosen as function keys for unlocking the childlock; the response event when pressing the two keys at the same time in the program is defined as unlocking the childlock; after detecting the ADC of the two function keys for unlocking the childlock, a CPU reads a childlock marker bit in EEPROM and judges whether in a childlock state presently; when the marker bit is TRUE, the CPU sends an order to unlock the childlock and makes FALSE of the childlock marker bit in EEPROM, thereby finishing the operation of unlocking the childlock by key. According to the feature that different resistances on the TV key control board feed back different ADC values to the CPU and through pressing a plurality of keys on the key control board at the same time, the function of unlocking the childlock is realized; therefore, when the TV remote controller fails or is lost, the function of unlocking the childlock can also be realized through operating the key control board.

Description

Method by the keying panel relieving child lock of television

[technical field]

The present invention relates to technical field of television sets, particularly a kind of method by the keying panel relieving child lock of television.

[background technology]

Along with the continuous increase of television broadcasting signal, the content that people can watch is also more and more, and this has just impelled the birth of functions of child lock.Functions of child lock has solved some head of a familys' worry, because can being not suitable for programs such as violence that children watch, pornographic to some, it shields, and its operation is fairly simple, as long as just can operate by the remote controller of television set, realize functions of child lock or remove virgin lock, but this switch control of general television set can't realize that main cause has two: after having added the virgin locking key of releasing on the first keying panel, do not have real child's lock effect; It two is that the keying panel number of keys is limited, can't add button unnecessary, that access times are few.But along with the variation of time, the virgin locking key of the remote controller in the subscriber household has broken down or remote controller when can not find, and some just can't be removed functions of child lock by the program that the child has locked, thereby have brought new worry to the user.When running into this problem, television set with function not only can not provide convenience to the user, added worry to the user on the contrary, the program that original user can normally watch, the processing of normal running, all can't realize now, so be necessary to research and develop a kind of method that does not need remote controller can remove virgin lock,, make the user when remote controller damages or can not find remote controller and removes functions of child lock with head it off, can conveniently remove virgin lock, watch the program of before having been locked by the child.

[summary of the invention]

For addressing the above problem, main purpose of the present invention is to provide a kind of method by the keying panel relieving child lock of television.

For achieving the above object, technical scheme of the present invention is:

A kind of method by the keying panel relieving child lock of television comprises the steps:

Select two buttons on the keying panel for removing the functions of child lock key, and the response events when pressing these two buttons simultaneously is defined as and remove virgin lock in program;

CPU detects the child who just reads among the EEPROM behind the ADC of described two releasing functions of child lock keys and locks flag bit, judges the current virgin lock state that whether is in; When flag bit was TRUE, CPU sent the virgin lock instruction of releasing and removes child's lock, and with virgin lock mark position FALSE among the EEPROM, thereby finish the virgin operation of locking of key release.

Compared to prior art, the present invention passes through the resistance difference of the method for keying panel relieving child lock of television according to button on the television set keying panel, feed back to these characteristics of difference of the ADC value of CPU, realize removing functions of child lock by a plurality of buttons of pressing simultaneously on the keying panel, when TV remote controller can't normally be used or can not find, can realize removing the function of virgin lock equally by keying panel like this.

[description of drawings]

Fig. 1 is the schematic diagram of keying panel of the present invention.

Fig. 2 is the method flow diagram of the present invention by the keying panel relieving child lock of television.

[embodiment]

TV remote controller generally is to set a button in program to the operation of functions of child lock, realize virgin lock and remove virgin function of locking as KEY_A, when the user presses virgin locking key on the remote controller, program is just sent instruction manipulation " KEY_A " and is realized functions of child lock, and the child is locked normal place TRUE deposit among the EEPROM, when the user presses virgin locking key on the remote controller once more, it is to carry out " KEY_A " behind the TRUE to remove virgin lock that CPU reads among the EEPROM virgin lock flag bit, and the child is locked mark position FALSE deposit among the EEPROM, so just finished the operation of remote controller to child's lock.The present invention realizes removing virgin function of locking by the method for keying panel relieving child lock of television by the button of pressing on the keying panel, what no matter television set adopted is one road ADC input, still adopt the keying panel of two-way ADC input, the resistance of each button correspondence is different, so the magnitude of voltage that CPU reads after pushing button also is different, convert magnitude of voltage to corresponding binary system or hexadecimal numerical value through ADC, can become a key to the value defined in certain number range in the program, usually 0X00 is a minimum value, 0XFF is a maximum, and the centre has been divided into several zones and has judged what button is.Value difference according to the ADC of each the button correspondence on the keying panel, select on the keying panel any two keys as " screen shows " and " volume-" as releasing functions of child lock key, simultaneously, response events in program when pressing these two keys simultaneously is defined as removes virgin lock, when the user presses this two button simultaneously, promptly when " screen show " and " volume-" button, CPU just reads virgin lock flag bit among the EEPROM after detecting corresponding ADC, if flag bit is TRUE, program is carried out " KEY_A " and is removed virgin lock, and the child is locked mark position FALSE deposit among the EEPROM, so just finished the operation of the virgin lock of key release, wherein, the described gap that must be the ADC value as two buttons removing the functions of child lock key is bigger, and CPU just can not make mistakes when detecting like this.

Figure 1 shows that the schematic diagram of keying panel, wherein CPU is integrated eight road low speed A/D (analog/digital conversion) mouthfuls, two-way is used for finishing the input collection of keying signal, this two-way is denoted as KA, KB respectively; Wherein the KA road be responsible for " standby, screen show, channel+, channel-" the signal voltage input, the signal voltage input of " switching, menu, volume+, volume-" is responsible on the KB road; In the practical operation, the quantity of button and the definition of button also can reset by software.When a certain button is pressed, KA that it is corresponding or KB will produce a partial pressure value by corresponding dividing potential drop loop, partial pressure value is after the A/D sampling quantizes, preestablish a digital scope by software, which interval is value after the quantification fall into, CPU just can assert which key has the operation of pressing, and just responds relevant program then.As when not having key to press, the magnitude of voltage of KA and KB is all near 3.3V/5V, just the value after the A/D conversion is identified as FF by CPU like this, this value also is the maximum after the A/D conversion; In program two key screens pressing simultaneously on KA and the KB are shown and volume-time, after CPU detected corresponding ADC, just the program of virgin lock was removed in response, thereby finishes the releasing functions of child lock.

Fig. 2 comprises the steps: for the method flow diagram by the keying panel relieving child lock of television

S1: by cpu circuit scanning interruptive port, scan the interruption of key command constantly, judged whether that button interrupts;

S2: judge whether to be " removing virgin locking key " according to the key command code value;

S3: read virgin lock normal bit among the EEPROM, judge the current virgin lock state that whether is in;

S4:CPU sends and removes the virgin lock of virgin lock instruction releasing, with virgin lock mark position FALSE among the EEPROM.

Judged whether that by CPU scanning interruptive port button interrupts, detected in the button and had no progeny, judge whether to be " removing virgin locking key " according to code value, if remove virgin locking key, then judge the current virgin lock state that whether is in by reading among the EEPROM virgin lock normal bit, when being in virgin lock state, CPU sends and removes virgin lock instruction and remove virgin lock, with virgin lock mark position FALSE among the EEPROM, not that virgin lock state then withdraws from; If not remove virgin locking key, then withdraw from.CPU sends and removes virgin lock instruction releasing Tong Suohou, the child after the change is locked normal bit store among the EEPROM, logs off at last.

After having added the button releasing functions of child lock on the keying panel, the user just need not can not remove functions of child lock and worry when remote controller or remote controller can not normally use because of can not find, and responds an incident and also can reduce user misoperation by detecting on the keypad a plurality of buttons simultaneously simultaneously.

Most preferred embodiment described above only is that the present invention is set forth and illustrates, but is not limited to disclosed any concrete form, and it is possible carrying out many modifications and variations.

Claims

1. the method by the keying panel relieving child lock of television is characterized in that, comprises the steps:

Input collection with keying signal on keying panel is divided into two-way, is denoted as KA, KB respectively; Wherein the KA road be responsible for that standby, screen show, channel+, channel-the signal voltage input, and the KB road is responsible for switching, menu, volume+, volume-the signal voltage input, on keying panel, from KA road, KB road, select a button respectively, as removing the functions of child lock key, and the response events when pressing these two buttons simultaneously is defined as and removes virgin lock in program, the described gap that must be the ADC value as two buttons removing the functions of child lock key is bigger, and CPU just can not make mistakes when detecting like this;

2. the method by the keying panel relieving child lock of television as claimed in claim 1 is characterized in that, also includes following steps:

By cpu circuit scanning interruptive port, scan the interruption of key command constantly, judged whether that button interrupts, and judged whether to removing virgin locking key according to the key command code value.

3. the method by the keying panel relieving child lock of television as claimed in claim 2 is characterized in that: described keying panel can be the keying panel that adopts one road ADC input, also can be the keying panel that adopts two-way ADC input.