Liquid Crystal Display Products and System Solutions
Liquid Crystal Module (LCM) is simply the LCD screen and backlight assembly. For example, the display component of an LCD TV is the LCM, which is the low-temperature equivalent of the CRT’s picture tube. Other parts include power supply circuits, signal processing circuits, etc., of course, there are other accessories of the shell.
The LCD module is mainly divided into the screen and backlight assembly. The two parts are assembled together, but work independently of each other. The principle of LCD is that the backlight assembly emits light and the light passes through the LCD screen before being displayed. The role of the LCD screen is to control the processing of this light by pixel to display the image.
What is the difference between LCD module LCM and LCD panel?
Classification of LCD panel specifications
The so-called bad dots are a collective term for pixel dots on an LCD panel that cannot be displayed properly. LCD panel has numerous pixel points, each display point on the liquid crystal material under the control of electrical signals to change the light transmission with the state of completion. In 1024 * 768 resolution, the LCD panel has a total of 786432 display points, so many points it is difficult to fully ensure that individual problems will occur. The current technology can not completely overcome the situation without bad points, therefore, the level of the panel is also divided according to the number of bad points to judge. Manufacturers generally avoid bad points split LCD panels, no bad points or very few bad points of the LCD panel sold at a high price, while the number of bad points is relatively large number of low-priced processing.
Currently the main panel grading standards are:
Korean manufacturers, less than 3 for A grade
Japanese manufacturers, 5 or less for A grade
Taiwan-based manufacturers, 8 or less for A-grade
Mainstream LCD monitor brand key indicators:
Grade AA: LCD monitors without any bad dots are Grade AA.
Grade A: 3 bad dots or less, with no more than one bright dot, and the bright dot is not in the center area of the screen.
Grade B: 3 bad points or less, of which no more than two bright spots, and bright spots are not in the center of the screen area.
In addition, the quality of the LCD panel and the LCD panel resolution, brightness, response time, visibility, contrast and so on. LCD panel manufacturing control IC, filters and directional film and other accessories and panel contrast is closely related to the general user, the contrast can reach 350:1 is enough, but in the professional field of such a contrast level can not meet the needs of users.
Brightness is also a more important indicator, the brighter the LCD to give people a very far look, from a row of LCD wall stand out, the principle of LCD display brightness is to rely on the panel behind the brightness of the backlight tube to achieve. Response time refers to the liquid crystal display for the input signal response speed, that is, the liquid crystal from dark to light or from light to dark response time, usually in milliseconds (ms) as a unit. Response time is the shorter the better.
STONE Technologies is a proud manufacturer of superior quality TFT LCD modules and LCD screens. The company also provides intelligent HMI solutions that perfectly fit in with its excellent hardware offerings.
STONE offers complete modules that can be transformed into an HMI unit. The module kits typically include these components:
- TFT drive
- Microcontroller unit with attached CPU
- UART port
- Flash memory
- Power supply
There is also a downloadable design software called STONE Designer. This is a completely free GUI design software you can use to create responsive digital module-ready user interfaces.
STONE TFT LCD modules come with a microcontroller unit that has a 1GHz Cortex-A8 CPU. Such a module can easily be transformed into an HMI screen. Simple hexadecimal instructions can be used to control the module through the UART port. Furthermore, you can seamlessly develop STONE TFT LCD color user interface modules and add touch control, features to it.