Choosing the screen brightness for a all-in-one touch panel requires a comprehensive consideration of ambient light intensity, application scenario, screen type, and functional requirements. This section focuses on LCD screens. Regarding LED screens, consider the actual environment in which the product will be used: indoors, semi-outdoor (with shelter), or outdoors.

1. Indoor Use

For indoor use, a standard brightness of 250-450 dpi is sufficient, and anti-glare treatments are unnecessary. Higher brightness levels can lead to visual fatigue and increased energy consumption. For indoor use in bright sunlight, consider a higher-brightness display or optional anti-glare features.

2. Semi-outdoor environments (such as outdoor smart cabinets, shopping mall atriums, and other covered environments).

A LCD with a brightness of 500-800 d/m² is generally required. If the temperature is typically high, consider choosing a wide-temperature display. Ensure proper heat dissipation, such as by adding a cooling fan, and adjust the installation or ceiling design to avoid direct sunlight on the screen. Anti-glare can be an option, but this will reduce some of the screen's brightness.

Traditional displays only output information and require peripherals such as a keyboard and mouse for operation. Touchscreen displays, on the other hand, combine "information display" with "command input." Users can complete operations by simply tapping on-screen icons or swiping through menus with their fingers or a stylus. Their core advantage lies in "more direct interaction and more efficient operation." 1. Display Layer: Utilizing high-definition display panels such as LCD and OLED, these panels clearly present text, images, and user interfaces, serving as the visual foundation for touch interaction. DEWO touchscreen displays utilize A+-grade panels for the display layer, offering high-definition resolution and 98% color reproduction, ensuring crisp and detailed information.

3. Outdoor Use For unobstructed outdoor environments (such as building exteriors, plaza advertising screens, and bus stop displays), LCD screens can choose 700-1000 cd/m², while LED screens may require greater than 2000 cd/m². A cooling system and IP65 dust and water resistance are essential.

4. Brightness and functional requirements for special scenarios

For example, in education and healthcare settings, features like smart dimming and eye protection modes should be considered.

Common Mistakes

1. Blindly Pursuing High Brightness

Excessive brightness (e.g., >600 cd/m² indoors) can cause color distortion (grayscale compression), double power consumption, and may trigger thermal shutdown protection.

2. Ignoring Supporting Features

Cooling Design: High-brightness screens require a full metal casing with heat pipes to dissipate heat to prevent high-temperature light decay (e.g., LED brightness decreases by 4% for every 10°C increase in temperature). Anti-glare or AR coatings are also recommended.

Therefore, when selecting a touch panel, we need to know our application environment, especially when using it in an outdoor or semi-outdoor environment. We need to understand the local maximum and minimum temperatures, whether there is a sunshade for the touch panel installation, the peak value of direct sunlight in the outdoor environment, and many other factors.

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