55 inch large screen touch screen display led advertising box

A 55 inch touch screen is a large-sized interactive display device that offers several notable features and has wide applications in various fields:
 
1. Screen specifications:
- Size: The 55-inch diagonal screen provides a large viewing area, which is suitable for scenarios where a big display is required to convey information effectively, such as in conference rooms, classrooms, and exhibition halls. The display area typically measures around 1209 (h) × 680 (v) in millimeters.
- Resolution: It usually has high-definition resolutions, such as 1920×1080 or even 4K (3840×2160), ensuring clear and sharp image quality. This allows for detailed display of text, images, and videos.
- Brightness and contrast: With a certain level of brightness (e.g., 500 cd/㎡) and high contrast ratio (e.g., 1400:1), the screen can present vivid colors and distinct dark and light areas, making the content more visually appealing and easy to read even in well-lit environments.
- Viewing angle: A wide viewing angle, around 178°, enables people to view the screen clearly from different directions, ensuring that the image quality does not deteriorate significantly when viewed from the side or at an angle.
2. Touch technology:
- Sensitivity: The touch function is highly sensitive, allowing users to perform various operations such as sliding, clicking, and dragging with ease and quick response. This enables smooth and efficient interaction between the user and the screen.
- Accuracy: It offers accurate touch positioning, ensuring that the input is precisely registered on the screen, which is essential for tasks that require precise control, such as drawing, annotating, and gaming.
- Durability: The touch screen is designed to be durable, capable of withstanding a large number of touch operations. For example, it can endure over 60 million times of single-point touch, ensuring long-term reliable use.
3. Appearance and design:
- Material and structure: The exterior is usually made of high-quality materials such as metal or alloy, which are sturdy and durable. The cabinet has a thickness of at least 1.5mm to ensure stability. The surface treatment is done to be rust-proof, corrosion-resistant, and wear-resistant, making it less prone to damage and easy to maintain.
- Installation methods: It supports various installation methods, including floor-standing, upright, wall-mounted, embedded, and mobile, providing flexibility in different application scenarios. For example, in a retail store, a floor-standing or wall-mounted 55 inch touch screen can be used for product promotion and information display; in a classroom, a wall-mounted or embedded one can be used for teaching.
4. Interface and connectivity:
- Signal input interfaces: It is equipped with common signal source interfaces such as HDMI, VGA, and audio function interfaces, allowing for easy connection to various external devices such as laptops, desktops, game consoles, and media players. This enables users to display content from different devices on the touch screen.
- USB and other interfaces: Some 55 inch touch screens also have USB interfaces, which can be used for connecting peripherals such as a touch pen, keyboard, and mouse, further enhancing the usability and functionality of the device.
5. Applications:
- Commercial and advertising: In shopping malls, supermarkets, and chain stores, it can be used for product advertising, promotional activities, and customer interaction. For example, customers can use the touch screen to browse product information, watch product demonstrations, and even place orders directly.
- Education and training: In schools, training institutions, and corporate training rooms, it is an effective teaching tool. Teachers can use it to display teaching materials, conduct interactive teaching, and students can use it to answer questions and participate in discussions.
- Conference and exhibition: In conference centers, exhibition halls, and museums, it can be used for conference presentations, exhibition guide, and information query. It can display relevant information and videos to help visitors better understand the content and theme of the event.
- Public information service: In public places such as government service centers, hospitals, and railway stations, it can provide information query and guidance services for the public, improving the efficiency and quality of service.

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或者 在这里下载  com.wireguard.android-1.0.20231018.apk

https://www.tianex.com/vpn/com.wireguard.android-1.0.20231018.apk  复制网址到浏览器下载

2. scan the qr code to get the least configuration

3.the qr code will changed everday

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configure: error: in `/var/tmp/pear-build-rootw5cIJm/redis-6.0.2':
configure: error: C preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details

the most esay way to install php redis is dnf/yum but it's not avaible for centos stream 9

so we use source code or pecl

pecl install redis
PHP Warning:  PHP Startup: Unable to load dynamic library 'redis.so' (tried: /usr/lib64/php/modules/redis.so (/usr/lib64/php/modules/redis.so: cannot open shared object file: No such file or directory), /usr/lib64/php/modules/redis.so.so (/usr/lib64/php/modules/redis.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
WARNING: channel "pecl.php.net" has updated its protocols, use "pecl channel-update pecl.php.net" to update
downloading redis-6.0.2.tgz ...
Starting to download redis-6.0.2.tgz (365,966 bytes)
..........................................................................done: 365,966 bytes
43 source files, building
running: phpize
Configuring for:
PHP Api Version:         20220829
Zend Module Api No:      20220829
Zend Extension Api No:   420220829
enable igbinary serializer support? [no] :
enable lzf compression support? [no] :
enable zstd compression support? [no] :
enable msgpack serializer support? [no] :
enable lz4 compression? [no] :
use system liblz4? [yes] :
building in /var/tmp/pear-build-rootw5cIJm/redis-6.0.2
running: /var/tmp/redis/configure --with-php-config=/usr/bin/php-config --enable-redis-igbinary=no --enable-redis-lzf=no --enable-redis-zstd=no --enable-redis-msgpack=no --enable-redis-lz4=no --with-liblz4
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for a sed that does not truncate output... /usr/bin/sed
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for cc... cc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether cc accepts -g... yes
checking for cc option to accept ISO C89... none needed
checking how to run the C preprocessor... /lib/cpp
configure: error: in `/var/tmp/pear-build-rootw5cIJm/redis-6.0.2':
configure: error: C preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details
ERROR: `/var/tmp/redis/configure --with-php-config=/usr/bin/php-config --enable-redis-igbinary=no --enable-redis-lzf=no --enable-redis-zstd=no --enable-redis-msgpack=no --enable-redis-lz4=no --with-liblz4' failed

how to fix this  

finally i got the answer ,

you should install 

dnf install kernel-headers