Portable projection device

Abstract

The invention discloses a portable composite electronic device for public learning, data transmission, entertainment and public management, which includes a casing containing a plurality of subassemblies. The sub-assembly includes: a projector for projecting enlarged video and digital data to a predetermined oversized image onto a surface outside the housing; for recording, reproducing and storing audio, video and / or digital data to an external disc and a built-in storage unit, and / or a device operating in reverse; a computer circuit for receiving and processing data input through an input device, and adapted to be connected to a network; and a television adapted to receive data from a variety of television signals machine tuner card. The sub-assemblies are pre-connected to each other so that the sub-assemblies can be operated with a single button on-off and make the device very compact, portable and easy to use.

Description

technical field [0001] The present invention relates to the field of electronic devices, in particular to a portable synthetic multimedia electronic device based on integrated technology, especially in education, common learning, emergency and disaster handling, public announcements, sales promotion and public activities, public management, entertainment, Internet, broadcasting, etc. It is used in (but not limited to) receiving, storing and processing digital and / or analog signals from satellite, radio, television broadcasting, recording devices and displaying super-sized images in social applications of aspects. Background technique [0002] Under the existing economic and social conditions, there is a wide awareness and demand for multimedia information at the social group level and its reception, storage, processing, dissemination and display. Various groups that seek and need the above information include families, school groups, village councils and their collective org...

AI Technical Summary

Problems solved by technology

However, this US patent 6522419 suffers from the following disadvantages and disadvantages

[0021] 1). The device disclosed in U.S. Patent 6,522,419 is a collection of known subassemblies which are not sufficiently user-friendly due to the necessity to manufacture many connectors for different input and output devices in front of the device, and the The unit also requires the user to be familiar with and have knowledge of the different types of connectors and cables, which cannot be expected and assumed by new users, especially in rural areas of developing countries where technology penetration is low

[0022] 2). The device also includes additional connectors for various input and output devices, and thus cannot provide a portable synthesis system; therefore it is easily damaged, lost or destroyed

[0023] 3).The display of the image is limited to a large screen electronic display or using a separate projector to project the image of the output device, which has inherent display size limitations

[0024] 4). Acquisition of the device is costly and would make it inaccessible to rural areas in India and other developing countries

[0025] 5).The device requires a specific controller which can make it difficult to operate in rural areas and uneducated people

[0026] 6). Since the device requires multiple input and output devices, in rural India and other areas where the power supply is unreliable and unstable, the use of several voltage stabilizing devices and continuous power supply devices is essential, which will lead to complexity increase and increase in overall cost of the installation

[0027] 7). The device relies on a dedicated operating system and main program installed on the chip, which limits the options for upgrades and increases the cost of upgrades

The above devices combine two expensive systems, provide a choice between displaying computer (digital) signals or television broadcast signals, but limit their display to large-screen televisions, which inherently limits their use in family

Audience groups of 50 to 100 people will have difficulty using this device

[0036] (iii) High technical requirements and high costs in upgrading, updating, maintenance and delaying scrapping

[0037] In addition to the above disadvantages, the above devices also require a lot of space for storage and use, as well as peripheral and auxiliary devices and equipment including temperature control, dust control and security.

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