CN1554981A - Embedded USB started multimedia projector - Google Patents

Abstract

The embedded USB started multimedia projector includes traditional projector, integrated mainboard in computer and other hardware, mobile operation system and USB flash memory as system carrier. The mainboard has display output port connected to the input port of the projector, USB port and network interface for outside connection and other interfaces for input equipment. Being no longer one simple terminal equipment, the projector may be operated alone without needing any other outside equipment for reading out and projecting user's file. The present invention has powerful function, convenient use, low cost, high reliability and high safety.

Description

The multimedia overhead projector instrument that universal embedded universal serial bus starts

Technical field

The invention belongs to multimedia technology field, be specifically related to the multimedia overhead projector instrument that a kind of universal embedded universal serial bus starts.

Background technology

Along with the fast development of infotech, people improve constantly for the understanding of electronic product, and projector transforms into general IT office appliance from a kind of professional instrument gradually as a kind of practical product, and popularizes in social industry-by-industry field.Show according to investigations, education sector user has occupied more than 50% of domestic projector user, under the overall situation of country's " prospering the nation with science and education ", various places educational institution is improving teaching level energetically, is strengthening teaching means, and wherein the audio-visual education programme reform is an important step of improving teaching environment.The audio-visual education programme industry is the user group of domestic projector product maximum, and education department will strengthen the hardware input in educational institution, and the terminal device of projector long-distance education the best just.Simultaneously, big along with the widespread usage of Computer Multimedia Technology and network technology, little to various temporary meetings and technology lecture to commander Surveillance center and network management center, all thirst for obtaining big picture, broken colour, high brightness, high-resolution display effect.Therefore, projector more and more becomes the requisite playing terminal equipment of all trades and professions.

Nowadays, novel projector constantly comes out.Manufacturers not only will concentrate on constantly to promote the display quality of projector, also take into account the diversification and the seriation of product.More and more advanced in technology, when practicality was more and more stronger, just towards the development of miniaturization aspect, portable, ultra portable projector became the main flow in market to the volume of projector gradually.The price of projector is also more and more cheap, even the family expenses projector of price about ten thousand yuan released in some manufacturer's plan.Use for convenient, projector and notebook computer bundle sale are also become a kind of trend gradually.At no distant date, network and wireless technology can further improve, and personalized when the time comes function design will become the important means that product increases competitive power and enlarges market share.

Yet but exist a big shortcoming in present projector product and the technology: no matter how powerful portable Du Duogao, the function of projector be, but is a kind of terminal output device eventually.The internal structure of projector has determined it can not play any content independently, uses and must be connected the back with computing machine as external unit.The current notebook computers that use in all kinds of use occasions link with it more, do like this and have not only improved the cost price that projector uses, and have reduced portable meaning, and its practicality is also had a greatly reduced quality simultaneously.

Summary of the invention

The objective of the invention is to propose that a kind of volume is little, cost is low, practical, and can read and the novel multimedia overhead projector instrument of projection user file.

The novel multimedia overhead projector instrument that the present invention proposes is on the basis of conventional projector, has integrated hardware device such as the integrated mainboard on the host computer and Mobile operating system and forms, and the carrier of system adopts USB (universal serial bus) (USB) flash memory.Specifically be that this novel projection section adopts at present the identical hardware configuration of projector usually, in main frame, be integrated into integrated mainboard, and mainboard shown that output port and projector input port connect in main frame, externally provide USB port, network interface and other input equipment interface, as keyboard, mouse interface etc.Claim that the present invention is the multimedia overhead projector instrument that universal embedded universal serial bus starts.This projector is simple terminal equipment no longer just, need not just can independently work by external any equipment the file of projection user appointment.In the present invention, use " Mobile operating system " technology (number of patent application is 03151030.2), use the carrier of flash disk as operating system and projection platform.Advantage, the characteristics of invention:

With respect to traditional projector, the projector that universal embedded universal serial bus starts has the following advantages:

1. powerful.

Projector is a simple terminal equipment no longer just, but one " computer of band projecting function " need not link to each other with any external host during use.Do not had this restriction, the function of projector is strengthened to a great extent.

2. easy to use.

Since need not external equipment, the use of projector just can not be subjected to the restriction of environment for use.The user needn't worry whether the main frame that can connect is arranged, and needn't worry the problem that is provided with of each class interface between main frame and the projector more.

3. cost is low.

Though smart projector has been added many hardware devices on the conventional projector basis, cost may increase.If but the cost consideration of the main frame that will link to each other with conventional projector enter, consider that particularly current a lot of projector all use notebook computer as main frame, the cost of smart projector has reduced much undoubtedly.

Certainly, we also can by with equipment integrations such as mainboard chip, hard disks in projector inside, reach and need not the purpose that external main frame also can carry out projection.But by contrast, the projector of universal embedded universal serial bus startup has following advantage:

1. light and handy, be easy to carry.

Show that according to investigations projector is mainly used in public occasion at present, this has just determined projector must have movability preferably, is convenient to that the user carries and uses in different occasions.The projector that universal embedded universal serial bus starts be owing to need not be equipped with hard disk, and uses integrated mainboard, and therefore to a certain extent, the volume and weight of machine has all reduced a lot, adapts to " moving " demand of user more.

2. reliability height, energy consumption is low

Because hard disk is a kind of equipment of machinery storage, therefore body vibrations in the daily use etc. all cause the corrupted data of hard disk easily, cause user's unnecessary loss.And the projector that universal embedded universal serial bus starts uses the carrier of flash disk as operating system and data.Have benefited from the electronics storage mode of flash disk, it has hardware reliability preferably, and energy consumption is also lower simultaneously.

3. Unsupervised, individualized degree and security are higher

Because projector itself is exactly a kind of equipment that movability is had relatively high expectations, therefore if be equipped with hard disk therein, the maintenance and management of its system will cause huge trouble to the user.The projector that universal embedded universal serial bus starts uses the flash disk of plug and pull as guiding device and operating platform, has just saved the trouble of system maintenance.Also can realize simultaneously personalized use, promptly everyone uses the flash disk operating system of oneself when the content of projection oneself and file, and all users can use its familiar interface and content, the operation of being familiar with on projector like this.This has been avoided the destruction (as virus, rogue program etc.) to projecting apparatus system on the one hand, also can not stay any file logging about the user on the projector on the one hand.

Embodiment

Mainly comprise the customization of Mobile operating system and the realization that hardware is integrated.

1, Mobile operating system (seeing that number of patent application is 03151030.2).

Smart little, safety, stable, beautiful interface, hardware requirement is low, and can self-defined property strong, software be abundant, the copyright permission.

Based on above-mentioned consideration, decision is adopted (SuSE) Linux OS and is simplified and improve.Below be specific embodiments:

(1) BIOS (basic input output system, Basic Input or Output System (BIOS))

A) power on self test (POST, Power-On Self-Test), self-checking system equipment

B) final stage of BIOS, read main boot record (MBR, main start record) to the particular memory address and redirect carry out.

C) mainboard of supporting USB-HDD to start can be with flash disk with the access of hard disk mode.The flat storage of flash disk is modeled as common hard disk and conducts interviews with cylinder head sector (CHS, cylinder/magnetic head/sector) pattern.

(2) operating system

D) GRUB (a kind of Linux starts supervisory routine) guiding kernel

We adopt GRUB rather than the general LILO that adopts (another kind of Linux starts supervisory routine) to guide kernel.

For visit and the startup of supporting USB, must carry out a series of changes and identification again in kernel.

E) boot kernel

Kernel is the basis of operating system, provides calculating the support and the system call interfaces of inboard installation.It can be before real subregion be by carry in start-up course, and the initrd.img file mount on ROOT (root) subregion point, as the virtual file system in the internal memory, and is carried out wherein startup script.Can load file system driver here generally speaking.In this stage, we have carried out modification, simplified and have recompilated kernel, start and reduce the size of whole kernel to support USB; Simultaneously, we also make amendment to initrd and wait for the initialized time of USB to provide.

F) startup of Init process

I, Init process are the parent processes of all processes, start prior to every other process.

Ii, we derive other processes and terminal shell process by the init process.

G) Shell process

Be the translation of user and operating system, it provides the command-line prompt symbol, and the user can operate at this.

(3) application program

Comprise player, multimedia player of graphical interfaces X-window, network support, forms such as support PPT, PDF etc.In order to save the space, we have also carried out deleting and optimizing.

2, the realization of hardware integration.

Projector partly adopts the hardware configuration identical with popular at present projector, is integrated into simultaneously integrated mainboard in whole main body, and mainboard is shown that output port and projector input port realize connecting in main frame.USB port, network interface, other input equipments such as interfaces such as keyboard, mouse externally are provided.Wherein USB port need be equipped with two or more, a interface as Mobile operating system, and other flash disks that can be used as general storage data insert.

Claims (2)

1, a kind of multimedia overhead projector instrument of universal embedded universal serial bus startup, on the basis of conventional projector, integrated integrated motherboard hardware equipment and the Mobile operating system on the host computer, it is characterized in that system's carrier adopts USB (universal serial bus) (USB) flash memory; Projection section adopts at present the hardware configuration of projector usually, is integrated into integrated mainboard in main frame, and mainboard is shown that output port and projector input port connect in main frame, externally provides USB port, network interface, and other input equipment interface.

2, multimedia overhead projector instrument according to claim 1 is characterized in that Mobile operating system adopts (SuSE) Linux OS, specifically comprises;

(1) BIOS comprises:

A) self-checking system equipment;

B) final stage of BIOS reads MBR to the particular memory address, and redirect is carried out;

C) support the mainboard that USB-HDD starts, with flash disk with the access of hard disk mode;

(2) operating system comprises:

A) GRUB guiding kernel;

B) boot kernel;

C) startup of Init process;

D) Shell process;

(3) application program comprises: player, the multimedia player of graphical interfaces X-Window, network support, forms such as support PPT, PDT.