Ubuntu mobile operating system opens to download the first batch to support Nexus devices
On February 22, the Ubuntu mobile operating system Ubuntu Touch is available for download today. The first supported models are Galaxy Nexus, Nexus 4, Nexus 7 and Nexus10. According to the Ubuntu documentation, the Ubuntu mobile operating system released this time is a developer preview version. This is a brand-new, but unfinished version of Ubuntu, which is only for developer testing. At present, Ubuntu fails to provide complete mobile phone functions. It cannot replace daily mobile phones. It only supports GSM networks, CDMA networks, and LTE networks. It does not support mobile data Internet access. It does not have a hands-free phone function and cannot send text messages. There are also fewer pre-installed apps than those seen in the previous screenshot. The main functions of the Ubuntu mobile version ROM include full gesture operation, global search, intelligent unified message bar, etc., which can be directly compatible with HTML5 web applications, and the tablet ROM can run desktop applications or even run other operating systems through virtual machines.
LED module introduction: LED Display Module is one of the main components of the finished Led Display! It mainly consists of LED lamp, PCB board, driver IC, resistor, capacitor and plastic kit!
Classification of Led Display Module
From the light color
LED display module is divided by color:
I. monochromatic modules, such as single red, single green, single blue, single yellow and single white modules
2. Two color modules, such as red and green, red and blue.
3. full color module is mainly a product with red, green and blue primary colors on one LED module
According to the purpose of LED display
LED display module is divided into indoor, semi outdoor and outdoor, grid screen, strip screen, glass screen, etc. according to the different use space.
From the use of lamp beads
According to different LED packaging devices, LED display module can be divided into: LED display module of direct light, LED display module of indoor lattice, LED display module of surface mount.
Divide by pixel spacing
According to the LED pixel spacing, generally used more is: p1.25, p1.875, p1.56, P2, P3, P4, P5 and so on.
LED display function
1. Play the role of commodity publicity and attracting customers.
2. Play the role of store decoration and improve the level of enterprises.
3. Play the role of lighting and innovation.
4. Play the role of popularizing knowledge. (it can be used to play small information of enterprise products and knowledge of relevant industries)
5. Play the role of bulletin board. (promotion, recruitment information release)
6. Act as a foil to the atmosphere. Through the display screen, you can play the welcome words of superior leaders and various VIPs to visit and guide, and the celebration words of various major festivals.
7. It plays a warning role and is often used for road traffic LED navigation indication, etc.
It is undeniable that the ultimate purpose of establishing billboards is to publicize commodity information, attract target customers and make the most profit as much as possible. Led billboard is to achieve this goal to become the first choice of enterprise publicity.
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