As a common display technology, liquid crystal display (LCD) is widely used in many fields such as industrial control, medical equipment, vehicle navigation, and handheld terminals. The brightness of the LCD screen is one of its important performance indicators, and is usually divided into two types: high brightness and low brightness. This article will analyze the difference between high brightness and low brightness from the perspective of industrial LCD exhibition, as well as the basis for selection in industrial applications.

Definition of high brightness and low brightness of LCD screen
The brightness of the LCD screen refers to the luminous flux emitted by the screen within unit area, and the unit is cd/㎡. The brightness of high-brightness LCD screens is generally above 500cd/㎡, while the brightness of low-brightness LCD screens is generally below 300cd/㎡. High-brightness LCD screens have higher brightness, so they have better visibility in strong light environments; low-brightness LCD screens have lower brightness, and are suitable for use in darker environments to protect the user's vision. .

Application scenarios of high brightness and low brightness of LCD screen
1. Application scenarios of high-brightness LCD screens
(1) Outdoor advertising machines: Outdoor advertising machines need to cope with various weather and light conditions. The high-brightness LCD screen has excellent anti-reflective performance and high brightness to ensure that the advertising content is clearly visible in strong light environments.
(2) Car navigation: Car navigation equipment needs to be used in an environment exposed to direct sunlight. The bright LCD screen can ensure that the driver can clearly view navigation information during driving.
(3) Industrial control: In industrial sites, high-brightness LCD screens can cope with the high temperature and strong light environment on site, ensuring that operators can accurately read equipment operating data.
2. Application scenarios of low-brightness LCD screens
(1) Medical equipment: Medical equipment needs to be used in a dark environment. Low-brightness LCD screens can reduce the brightness and reduce the visual fatigue of medical staff watching the screen for a long time.
(2) Handheld terminals: Handheld terminal devices are often used in dark environments. Low-brightness LCD screens can reduce power consumption and extend the battery life of the device.
(3) Indoor advertising machines: Indoor advertising machines are usually used in shopping malls, hotels and other places with dark lighting. The low-brightness LCD screen can meet viewing needs while reducing energy consumption.

Basis for selecting high brightness and low brightness of LCD screen
1. Ambient light conditions: Choose an appropriate high-brightness or low-brightness LCD screen according to the light conditions of the use environment. In a strong light environment, give priority to a high-brightness LCD screen; in a dark environment, give priority to a low-brightness LCD screen.
2. Equipment power consumption: The brightness of the high-brightness LCD screen is relatively high, and the power consumption is relatively large. Low-brightness LCD screens have low brightness and relatively low power consumption. Choose an appropriate high-brightness or low-brightness LCD screen based on the power consumption requirements of the device.
3. Device battery life: For portable devices such as handheld terminals, battery life is an important performance indicator. In a dark environment, choosing a low-brightness LCD screen can effectively reduce power consumption and extend the battery life of the device.
4. Equipment cost: The cost of high-brightness LCD screens is relatively high, and the cost of low-brightness LCD screens is relatively low. Choose an appropriate high-brightness or low-brightness LCD screen based on the project's cost budget.
5. User visual experience: High-brightness LCD screens have better visibility in strong light environments, but long-term viewing can easily cause visual fatigue. Low-brightness LCD screens can reduce visual fatigue when used in darker light environments. Choose an appropriate high-brightness or low-brightness LCD screen according to the user's visual experience needs.
High-brightness and low-brightness LCD screens each have their own advantages and applicable scenarios. In industrial applications, high-brightness or low-brightness LCD screens should be reasonably selected based on factors such as the actual use environment, device power consumption, battery life, cost budget, and user visual experience.