Medical Grade 16 bit RGB 800x480 7 Inch USART HMI SCREEN Module
with RTP
1. Parameters of Colour LCD Display
| Module No | CH80480M070 |
| Product Range M-Series | Medical Grade |
| core processor | 400M SOC processor |
| operating system | No operating system, can run after power on |
| agreement type | The default configuration instruction set, the host computer can be
configured to run MODBUS RTU, XGUS protocol |
| scripting language | LUA script, the logic, protocol and algorithm functions written by
users can be run inside the screen |
| size | 7.0 inches |
| resolution | 800*480 |
| Installation direction | Supports 0, 90, 180 and 270 degree swivel mount displays |
| storage | 128Mbit |
| font | Built-in vector fonts, edge anti-aliasing processing, supports
ASCII, GBK, GB2312, UNICODE (global language) fonts of any size,
and can also customize any computer font display |
| picture storage | Support JPEG, PNG (semi-transparent/full-transparent) compression,
and support image storage of any size. It can store about 185
full-screen pictures in total (calculated based on the size of
80KB/picture, BMP format is not recommended). The image compression
ratio is different, this value will fluctuate up and down |
| color | 65K colors, 16-bit RGB |
| Voltage | 4.5-30V |
| power consumption | The dimmest backlight, no speaker: 0.8W
The dimmest backlight, with speakers: 1.8W
Brightest backlight, no speaker: 2.4W
The brightest backlight, with speakers: 3.3W |
| communication method | RS232/TTL (factory default 232 level, short J5 is TTL level) |
| Communication baud rate | 1200～921600bps, typical baud rate: 115200bps |
| Communication Connector Specifications | Default HY2.0-8P, optional FPC1.0-10P |
| Image local download | SD card |
| Firmware local/remote upgrade | Insert the SD card to upgrade locally/Support the remote serial
port of the user's motherboard to upgrade the screen firmware |
| Image remote upgrade | Support users to remotely use their motherboard serial port to
upgrade screen-related picture projects, fonts, configuration
files, etc. |
| Real Time Clock (RTC) | Support clock, timer, countdown and other functions |
| Screen effective display area (AA) | Length*Width = 155.0mm*87.0mm |
| Product size (length*width*height) | 188.9mm*105.1mm*16.7mm (MAX, including TP) |
| Supporting PC software | VisualTFT® |
| Working temperature | -20～+70℃ |
| Storage temperature | -30～+80℃ |
| AV input | not supported |
| Audio Player | MP3 audio format (speaker 4Ω2W, mono), shared storage space with
pictures. If the mp3 format is adopted
The sample rate is 128kbps, and the memory usage is 0.92MB/minute |
2. Reliability Test of USART HMI lcd Module
All serial screens of Chenghao Optoelectronic have undergone a
series of process reliability tests before mass production: high
and low temperature, ESD, burst, radiation, touch life and other
tests to ensure product quality
(1) ESD Test-test environment:
Test ambient temperature: 25°C
Test environment humidity: 50%
Test process: Place the product flat on the test bench, and perform
contact and air discharge on the iron buckle and display area of
the serial port screen in turn, as shown in the figure below;
observe whether the screen resets and restarts, displays
abnormalities, etc.
(2) High and Low Temperature Aging Test-Test Environment
Test environment temperature: -20～+70℃
Test environment humidity: 60%±3%RH
Test process: Place the product obliquely in the high and low
temperature test box, as shown in Figure 3-3; pass the 72H high
temperature, low temperature, high and low temperature alternating
aging test, observe whether the screen resets and restarts,
displays abnormally, and functions abnormally during the test and
after the test.
(3)Group pulse test - test environment
Test ambient temperature: 25°C
Test environment humidity: 50%
Test process: place the product flat on the test bench, and supply
power to the screen through the power source coupled with the pulse
group generator by the pulse group generator, as shown in the
figure; observe whether the screen resets and restarts, displays
abnormally, and touches abnormally during the experiment.
3. LUA script configuration of SPI TFT LCD Display
The F-type, M-type, and IOT-type serial screens launched by
Shenzhen Chenghao Optoelectronics Co., Ltd. all support LUA
language scripts. The serial screen provides a rich LUA script API
and callback interface. Users can directly set and obtain the
running status of all configuration controls by calling the API
interface. Combined with the written logic processing, the screen
can complete the scheduled actions without the participation of an
external MCU, reducing the data communication between the MCU and
the screen.
LUA is a lightweight scripting language with simpler syntax and
logic than C language, so developers can get started directly. The
LUA language comes with a well-functioning mathematical function
library, string processing, JSON and other libraries, and has
function support for common mathematical operations, such as square
root, sine cosine, absolute value, etc.; due to the high frequency
of the screen itself, all complex algorithms are processed by the
screen, which greatly reduces the execution cost of the user's MCU.
To write the LUA script of the project in the VisualTFT software,
click [Tools] → [LUA Script Programming] on the menu bar to open it
4. Product architecture of Medical LCD Monitor
The industrial serial screen launched by Shenzhen Chenghao
Optoelectronics Co., Ltd. (chenghaolcd.com) is a serial display
terminal integrating TFT display driver, picture font storage, GUI
operation, audio playback and various configuration controls. The
user's single-chip microcomputer only needs to send and receive the
corresponding serial port instructions to easily realize the
display of text, pictures and curves.
The M series serial screen processor adopts a 32-bit 400M SOC
processor, which integrates functions such as SDR video memory and
JPEG image decoding.
