CN203134200U

CN203134200U - Blind person electronic notepad with braille character input function

Info

Publication number: CN203134200U
Application number: CN 201320028510
Authority: CN
Inventors: 钱跃良; 王向东; 张博宁; 赵希君; 李伟
Original assignee: Institute of Computing Technology of CAS
Current assignee: Institute of Computing Technology of CAS
Priority date: 2013-01-18
Filing date: 2013-01-18
Publication date: 2013-08-14
Anticipated expiration: 2023-01-18

Abstract

The utility model provides an electronic notepad for the blind with the Braille input function, comprising: a Braille button area connected to a microprocessor through GPIO, including 3 squares of Braille symbols, each side consisting of 6 buttons, and the buttons follow the Chinese Braille Arrangement according to the standard; button processor, connected to the microprocessor through GPIO; audio circuit, connected to the microprocessor through the SPI bus; power manager, electrically connected to the microprocessor; memory, connected to the microprocessor through the SPI bus ; the USB interface is connected to the memory through the USB bus; the microprocessor is connected to the Braille keypad, the key processor, the audio circuit, the power manager and the memory. The utility model inputs Braille in the Braille mode that blind people are accustomed to, can store Braille codes, record audio, and store music files, has rich functions, and can help blind people enjoy the convenience brought by information technology like normal people.

Description

A kind of blind person's electronic notebook with Braille input function

Technical field

The utility model relates to technical field of electronic products, especially relates to a kind of blind person's electronic notebook with Braille input function.

Background technology

Along with improving constantly of China's level of IT application, mobile electronic product (comprising notebook computer, panel computer etc.) is used widely in people's work, studying and living.

But, present nearly all mobile electronic product (comprising mobile phone and PAD etc.), its I/O mode is not considered physical disabilities' application demand all at ordinary people's design.The blind person can't enjoy the facility that infotech is brought because vision disorder is bigger to the obstacle that uses electronic product to face as the normal person.

The blind person many times needs to record some information in daily life, as telephone number, p.m.entry etc., therefore, has the mobile electronic product of braille input and account function, and is very important for the blind person.

The utility model content

The purpose of this utility model provides a kind of blind person's electronic notebook with Braille input function, and its feature richness, cost are low, easy to carry, and the braille input meets the custom of blind person writing braille, and is easy and simple to handle.

For achieving the above object, the blind person's electronic notebook with Braille input function of the present utility model comprises:

The Braille key zone is connected with microprocessor by GPIO, and this Braille key zone comprises the blind symbol of 3 sides, and every side is made up of 6 buttons, and button is arranged according to the Chinese braille standard code;

The button processor is connected with described microprocessor by GPIO, is used for carrying out user's input;

Voicefrequency circuit is connected with described microprocessor by spi bus, is used for the encoding and decoding audio frequency, and plays described audio frequency;

Power supervisor is electrically connected with described microprocessor, for detection of the electric weight of described blind person's electronic notebook and charge and power for described blind person's electronic notebook;

Storer is connected with described microprocessor by spi bus, is used for storage user's braille information, recorded message and music file;

USB interface is connected with described storer by usb bus, and described blind person's electronic notebook utilizes this USB interface and PC to communicate and data sharing;

Microprocessor is connected with above-mentioned Braille key zone, button processor, voicefrequency circuit, power supervisor, storer, and by the handling procedure logic it is controlled and manages.

Further, described button processor comprises function change-over switch and function menu button.

Further, described function change-over switch is a toggle switch.

Further, described voicefrequency circuit comprises the audio coding decoding chip for encoding and decoding, the power amplifier chip and the loudspeaker that are used for audio plays, be used for to insert earphone and detect the earphone interface of the band microphone whether earphone insert, the words that are used for the amplification microphone input signal are put chip, and the microphone that is used for receiving the audio frequency input.

Further, described electric power management circuit comprises be used to the lithium battery that electric power is provided and charges from USB interface, for detection of current electric quantity and when user's active inquiry or electric weight are not enough to the lithium battery electric weight detection chip of user prompt, the lithium cell charging managing chip that is used for the management charging, and a plurality of LDO that are used for changing voltage.

Further, LDO comprises two 2.5V LDO and a 3.3V LDO, and the LDO here is low pressure difference linear voltage regulator.

Further, described storer comprises TF card and SD card HUB chip.

Further, described USB interface is connected with described SD card HUB chip by usb bus.

Beneficial functional of the present utility model is,

1, the utility model can be imported the braille coding in the Braille mode that the blind person was accustomed to, and the braille of input coding meets national standard.

2, the utility model both can have been stored the braille coding, also can record, and can also store music file, feature richness.

3, the utility model by communication interface, automatically with the content on the electronic notebook, is transferred on the computing machine and preserves when linking to each other with computing machine.

Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to restriction of the present utility model.

Description of drawings

Fig. 1 is the structural representation of blind person's electronic notebook of the present utility model;

Fig. 2 is the inner structure synoptic diagram of blind person's electronic notebook of the present utility model.

Embodiment

As shown in Figure 1, the blind person's electronic notebook with Braille input function of the present utility model comprises:

Fig. 2 is the structural representation of an embodiment of blind person's electronic notebook of the present utility model.As shown in Figure 2, the inner structure of this blind person's electronic notebook is as follows:

Described button processor comprises function change-over switch and function menu button, all is connected with described microprocessor by GPIO.

Described function change-over switch is a toggle switch.System realized difference in functionality when it dialed to diverse location.In a preferred embodiment, this function change-over switch can switch to 4 diverse locations, represents system closing, Braille input pattern, recording mode, audio-frequency play mode respectively.

Described voicefrequency circuit comprises the audio coding decoding chip for encoding and decoding, the power amplifier chip and the loudspeaker that are used for audio plays, be used for to insert earphone and detect the earphone interface of the band microphone whether earphone insert, the two-way words that are used for the amplification microphone input signal are put chip, and the microphone that is used for receiving the audio frequency input.The audio coding decoding chip is connected with microprocessor by spi bus, and is electrically connected with the power amplifier chip simultaneously; The power amplifier chip is electrically connected audio coding decoding chip and loudspeaker.Words are put chip and are electrically connected audio coding decoding chip, microphone, and the power amplifier chip.The earphone interface of band microphone is electrically connected the power amplifier chip and words are put chip.

In playing process, decoded by decoding chip earlier, the power amplifier chip amplifies this audio frequency and plays in loudspeaker then.In Recording Process, sound is put chip via words and is amplified by the microphone typing, encodes by codec at last.When earphone or microphone insertion jack, the power amplifier chip can detect this insertion, and power amplifier can switch the passage of output voluntarily and notify words to put switching channel.

Described electric power management circuit comprises be used to the lithium battery that electric power is provided and charges from USB interface, for detection of current electric quantity and when user's active inquiry or electric weight are not enough to the lithium battery electric weight detection chip of user prompt, the lithium cell charging managing chip that is used for the management charging, and a plurality of LDO that are used for changing voltage.LDO comprises two 2.5V LDO and a 3.3V LDO.

Described storer comprises TF card and SD card HUB chip, all is connected with described microprocessor by spi bus.

Described USB interface is connected with described SD card HUB chip by usb bus.

Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.

Claims

1. An electronic notepad for the blind with Braille input function, characterized in that, comprising:

The Braille keypad is connected to the microprocessor through GPIO. The Braille keypad includes 3 squares of braille characters, each side is composed of 6 keys, and the keys are arranged according to the Chinese Braille standard;

The button processor is connected with the microprocessor through GPIO for user input;

The audio circuit is connected with the microprocessor through the SPI bus, used for encoding and decoding audio, and playing the audio;

The power manager is electrically connected to the microprocessor, and is used to detect the power of the electronic notebook for the blind and charge it and provide power for the electronic notebook for the blind;

The memory is connected with the microprocessor through the SPI bus, and is used to store the user's braille information, recording information and music files;

A USB interface is connected to the memory through a USB bus, and the electronic notepad for the blind utilizes the USB interface to communicate and share data with a PC;

The microprocessor is connected with the above-mentioned Braille keypad, key processor, audio circuit, power manager and memory for controlling and managing it. the

2. The electronic notepad for the blind according to claim 1, wherein the key processor includes a function switching switch and a function menu key. the

3. The electronic notepad for the blind as claimed in claim 2, characterized in that the function switching switch is a toggle switch. the

4. The electronic notepad for the blind as claimed in claim 1, wherein the audio circuit includes an audio codec chip for codec, a power amplifier chip and a loudspeaker for playing audio, for inserting earphones and detecting earphones Whether the headphone jack with microphone is plugged in, the preamp chip is used to amplify the input signal of the microphone, and the microphone is used to receive the audio input. the

5. The electronic notepad for the blind according to claim 1, wherein the power management circuit includes a lithium battery for providing power and charging from a USB interface, for detecting the current power and checking the power when the user actively inquires or the power is insufficient. The lithium battery power detection chip that prompts the user at the time, the lithium battery charge management chip used to manage the charging, and multiple low-dropout linear regulators used to convert the voltage. the

6. The electronic notepad for the blind according to claim 5, wherein the plurality of low dropout linear voltage regulators comprise two 2.5V low dropout linear voltage regulators and one 3.3V low dropout linear voltage regulator. the

7. The electronic notepad for the blind as claimed in claim 1, wherein the memory includes a TF card and an SD card HUB chip. the

8. The electronic notepad for the blind according to claim 7, wherein the USB interface is connected to the SD card HUB chip through a USB bus. the