CN202084190U - An embedded electronic book based on electronic ink screen - Google Patents

Abstract

The utility model relates to an embedded e-book based on an electronic ink screen. The embedded e-book comprises an embedded central processing unit, a display driving chip connected with the embedded central processing unit, and the electronic ink screen connected with the display driving chip. The embedded e-book operates a linux operation system and a QT graphical interface software, which aims at the characteristic that the electronic ink screen cannot refresh continuously, on an embedded ARM9 processor chip S3C2440, and a user application program operates on the basis of the linux operation system and the QT graphical interface software and is output to the electronic ink screen via the display driving chip S1D13521. By employing the mode, the embedded e-book can satisfy the condition that an application software development mode dose not change with the change of a display device, thereby facilitating the application of the embedded e-book in a plurality of industries.

Description

An embedded electronic book based on electronic ink screen

technical field

The utility model relates to an electronic book, in particular to an embedded electronic book based on an electronic ink screen.

Background technique

The characteristics of the electronic ink screen are very similar to paper, it does not hurt the eyes, it works intermittently, and the displayed content is retained after the power is turned off, which makes it very suitable as a reader.

Since the electronic ink screen is very special, it must have a dedicated driver chip. In addition, due to the complexity of the system software, it is very necessary to adopt an embedded linux operating system. But consider the convenience of application program design, must adopt embedded GUI QT, thereby satisfy application program to the operation demand of framebuffer; Described framebuffer is a kind of driver program interface that can directly write operation and immediately reflect on the display screen; GUI support software can also be implemented, but the disadvantage is that the management of the code will appear confusing, and the implementation details of the interface are mixed with the application program, which is not conducive to the modification and update of the code. In addition, embedded system resources are limited, and response time is the primary consideration.

Utility model content

The purpose of this utility model is to provide an embedded e-book based on an electronic ink screen, with an architecture scheme of an ARM9 processor chip S3C2440 plus a display driver chip S1D13521 to meet the driving requirements of an embedded e-book for an electronic ink screen; S3C2440 runs the embedded operating system linux and the QT graphical interface software for the electronic ink screen that cannot be continuously refreshed, which facilitates the development of user applications.

In order to achieve the above object, the technical solution of the present utility model is to provide an embedded electronic book based on an electronic ink screen, which includes an embedded central processing unit, a display driver chip connected to the embedded central processing unit, and a display driver chip connected to the embedded central processing unit. The electronic ink screen connected to the display driver chip is described above.

The embedded central processing unit is an ARM9 processor chip S3C2440 capable of running embedded operating system linux and QT graphical interface software aiming at the characteristic that the electronic ink screen cannot be continuously refreshed.

The display driver chip of the electronic ink screen is S1D13521, which is connected to the embedded central processing unit through an IO bus.

The embedded e-book based on the electronic ink screen also includes a memory module respectively connected to the embedded central processing unit, and a flash memory module storing executable application code and boot animation.

The e-book is connected to an external computer through a usb interface driven by a usb gadget, and when the flash memory module is mapped to a mobile hard disk on the computer, data transmission between the e-book and the computer is performed.

The embedded electronic book based on the electronic ink screen also includes a Bluetooth communication chip and a WIFI communication chip respectively connected to the embedded central processing unit to download and update the content of the electronic book.

The embedded electronic book based on the electronic ink screen also includes a power supply system connected to the embedded central processing unit, which manages the power supply of the electronic book using a lithium polymer battery, and supports the electronic book through The mini usb interface is connected to an external power source for charging.

The embedded electronic book based on the electronic ink screen also includes an input module connected to the embedded central processing unit; the input module includes a keyboard.

The embedded electronic book based on the electronic ink screen also includes an audio processing module connected with the embedded central processing unit.

Compared with the prior art, the embedded e-book based on the electronic ink screen of the utility model has the advantages that: the utility model runs the linux operating system on the embedded ARM9 processor chip S3C2440 and cannot continuously refresh the electronic ink screen The characteristic QT graphical interface software, the user application program runs on the basis of the two, and finally outputs to the electronic ink screen through the display driver chip S1D13521. In this way, the application software development mode can be satisfied without changing due to the change of the display device, which facilitates the application of electronic books in various industries.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the embedded electronic book based on the electronic ink screen of the present invention.

Detailed ways

The specific embodiment of the utility model is described below in conjunction with accompanying drawing.

As shown in Figure 1, the embedded e-book based on the electronic ink screen described in the utility model adopts the chip S3C2440 of the ARM9 processor as the embedded central processing unit 1, and its operating frequency reaches 400Mhz, which can adapt to the response of the embedded system time requirement.

The e-book is based on the electronic ink screen 3 of PVI company model ED060SC4; the chip S1D13521 is used as the display driver chip 2 of the electronic ink screen, which is connected to the processor chip S3C2440 through the IO bus. An input module 9 such as a keyboard is also provided to be connected to the processor chip S3C2440.

Connect with described processor chip S3C2440, be respectively provided with the sdram memory module 5 of 64M, and the nand flash flash memory module 4 of 1GB as storage subsystem. Executable application program codes are placed in the flash memory module 4 . The e-book also has a startup animation function, and animation content can be read from the flash memory module 4 . The audio processing module 10 can also be set to be connected to the processor chip S3C2440.

The embedded operating system linux and QT graphical interface software run in the processor chip S3C2440, and user application programs run on the basis of the two, and finally output to the electronic ink screen 3 . In the processor chip S3C2440, the software driving mode is the character device driving mode under linux, and the IO mode is adopted for driving.

The driver also provides the support capability of the driver interface framebuffer, that is, the write operation can be immediately reflected on the electronic ink screen 3; at the same time, the refresh of the driver interface framebuffer has also been modified: only when the graphics change, the driver interface framebuffer The output is only updated, so that the e-book has sleep and wake-up functions: when the page is turned, the operating system is in the wake-up state; after the page is turned on standby, the operating system is in the sleep state.

The QT graphical interface software modifies the standard QT support software, and develops a graphical interface base layer QT for the electronic ink screen 3 that cannot be continuously refreshed, and adopts a 16-level grayscale method; thus, the subsequent user application program Writing is not complicated by the use of electronic ink screens, and can be written according to traditional methods, thereby improving the efficiency of software development.

The driver also detects the voltage, if it is less than 3.7v, it will shut down the system. Connected with the processor chip S3C2440, a power supply system 8 is provided, which adopts a dedicated power supply chip of LTC3455, which manages the power supply of lithium polymer using 900mAH, and supports charging by connecting with an external power supply through a mini usb interface.

The e-book is driven by a usb gadget mode, and when the e-book is connected to an external computer through a usb interface, the flash memory module 4 can be mapped as a mobile hard disk on the computer to facilitate data transmission between the e-book and the computer.

It is connected with the processor chip S3C2440, and is also provided with a Bluetooth communication chip 7 and a WIFI communication chip 6, so as to facilitate downloading and updating of the contents of the e-book.

To sum up, the embedded e-book based on the electronic ink screen of the utility model runs the linux operating system on the embedded ARM9 processor chip S3C2440 and the QT graphical interface software aimed at the feature that the electronic ink screen 3 cannot be continuously refreshed, and the user The application runs on the basis of the two, and finally outputs to the electronic ink screen 3 through the display driver chip S1D13521. In this way, the application software development mode can be satisfied without changing due to the change of the display device, and it is convenient for the application of the electronic book in various industries.

Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions of the present utility model will be obvious to those skilled in the art after reading the above content. Therefore, the protection scope of the present utility model should be defined by the appended claims.

Claims (9)

1. embedded electronic book based on electric ink screen, it is characterized in that, comprise embedded central processing unit (1), the display driver chip (2) that is connected with described embedded central processing unit (1), and the electric ink that is connected with described display driver chip (2) screen (3).

2. according to claim 1 based on the embedded electronic book of electric ink screen, it is characterized in that described embedded central processing unit (1) is ARM9 processor chips S3C2440.

As described in the claim 2 based on the embedded electronic book of electric ink screen, it is characterized in that the display driver chip (2) of described electric ink screen (3) is S1D13521, it is connected by the IO bus with described embedded central processing unit (1).

As described in claim 1 or 3 based on the embedded electronic book of electric ink screen, it is characterized in that, also comprise the memory modules (5) that is connected with described embedded central processing unit (1) respectively, and the flash memory module (4) of storage executable application programs code and boot animation.

As described in the claim 4 based on the embedded electronic book of electric ink screen, it is characterized in that, described e-book is connected with external computer by the usb interface that usb gadget mode drives, and when described flash memory module (4) is mapped as portable hard drive on the computer, carry out the data transmission of e-book and computer.

As described in the claim 5 based on the embedded electronic book of electric ink screen, it is characterized in that, also comprise the Bluetooth communication chip (7) and the WIFI communication chip (6) that are connected with described embedded central processing unit (1) respectively, the content of described e-book is carried out down loading updating.

As described in the claim 6 based on the embedded electronic book of electric ink screen, it is characterized in that, also comprise the power-supply system (8) that is connected with described embedded central processing unit (1), it manages described e-book power supply using lithium polymer battery, and supports described e-book to be connected with external power source by mini usb interface and charge.

As described in the claim 7 based on the embedded electronic book of electric ink screen, it is characterized in that, also comprise the load module (9) that is connected with described embedded central processing unit (1); Described load module (9) comprises keyboard.

As described in the claim 8 based on the embedded electronic book of electric ink screen, it is characterized in that, also comprise the audio processing modules (10) that is connected with described embedded central processing unit (1).

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