What is the Brightness of a Multi Touch Panel?
As a multi touch panel supplier, I often get asked about the brightness of multi touch panels. Brightness is a crucial factor when it comes to the performance and usability of these panels, especially in various industrial and commercial applications. In this blog, I'll delve into what brightness means for multi touch panels, how it's measured, and why it matters.
Understanding Brightness in Multi Touch Panels
Brightness in a multi - touch panel refers to the amount of light emitted from the display surface. It is typically measured in nits, where one nit is equal to one candela per square meter (cd/m²). The higher the number of nits, the brighter the display. For multi touch panels, brightness is essential for ensuring clear visibility in different lighting conditions.
In indoor environments with normal lighting, a multi touch panel with a brightness of around 250 - 350 nits is usually sufficient. This level of brightness allows users to easily see the content on the screen, whether it's for interacting with a point - of - sale system, a kiosk, or a control panel. However, in brighter indoor settings, such as near large windows or in well - lit warehouses, a higher brightness level of 500 - 700 nits may be required.
Outdoor applications present an even greater challenge. Direct sunlight can be extremely bright, often reaching thousands of nits. To ensure readability in such conditions, multi touch panels need to have a brightness of at least 1000 nits, and in some cases, up to 2500 nits or more. These high - brightness panels are commonly used in outdoor kiosks, digital signage, and marine or automotive applications.
Factors Affecting Brightness
Several factors can affect the perceived brightness of a multi touch panel. One of the primary factors is the backlight. Most multi touch panels use LED backlights, and the quality and quantity of these LEDs play a significant role in determining the brightness. High - quality LEDs can produce more light, resulting in a brighter display. Additionally, the design of the backlight system, such as whether it uses edge - lit or direct - lit technology, can also impact brightness. Edge - lit backlights are more common in thinner panels, but they may not provide as uniform or high - intensity brightness as direct - lit systems.
The panel's coating also affects brightness. Anti - glare and anti - reflection coatings can reduce the amount of external light that reflects off the screen, making the content appear brighter and clearer. On the other hand, a panel with a poor coating may have significant glare, which can make it difficult to see the screen, even if the panel has a high native brightness.
Another factor is the color of the content being displayed. Dark colors absorb more light, while light colors reflect more. So, a screen displaying a lot of white or light - colored content will appear brighter than one showing mostly black or dark - colored content, even if the panel's brightness setting remains the same.
Measuring Brightness
The brightness of a multi touch panel is typically measured using a photometer. This device measures the amount of light emitted from the screen surface at a specific angle. Manufacturers usually provide the brightness specification in nits, which is an industry - standard unit of measurement.
It's important to note that the brightness specification provided by manufacturers is often the maximum brightness. In real - world use, the actual brightness may be lower due to factors such as power management settings, the age of the panel, and the temperature. For example, as a panel ages, the LEDs in the backlight may lose some of their brightness over time.
Why Brightness Matters
The brightness of a multi touch panel has a direct impact on user experience. Inadequate brightness can lead to eye strain, especially in bright environments. Users may have to squint or adjust their viewing angle to see the screen clearly, which can be frustrating and uncomfortable. This can be a significant problem in applications where users need to interact with the panel for extended periods, such as in industrial control rooms or public information kiosks.
In addition to user experience, brightness also affects the functionality of the panel. In applications where accurate touch input is required, such as in medical devices or industrial automation, users need to be able to see the screen clearly to make precise selections. If the screen is too dim, it can be difficult to accurately identify the touch targets, leading to errors and reduced efficiency.
Our Product Offerings
As a multi touch panel supplier, we offer a wide range of panels with different brightness levels to meet the needs of various applications. For example, our Industrial touch screen 7 inch 1024RGB600 LCD touch screen with IIC interface is suitable for indoor applications with normal lighting conditions. It has a brightness of around 350 nits, which provides clear visibility for most indoor uses.
Our 7 inch TFT Module LCD touch screen is available with different brightness options. You can choose a panel with a higher brightness level if you need it for brighter indoor or outdoor applications.
For more demanding outdoor applications, our Industrial 7 Inch LCD Touch Screen G+G Structure AR AF Glass Accurate Touch 7 Inch PCAP Touch Screen Panel offers a high brightness of up to 1500 nits. This panel is designed to withstand direct sunlight and provide clear visibility even in harsh outdoor environments.
Contact Us for Procurement
If you're in the market for multi touch panels and need to find the right brightness level for your specific application, we're here to help. Our team of experts can provide you with detailed information about our products and help you select the best panel for your needs. Whether you're a system integrator, an OEM, or a end - user, we can offer you high - quality multi touch panels at competitive prices. Contact us today to start the procurement process and take advantage of our expertise in multi touch panel technology.
References
- Feller, D. (2018). Display Technology Handbook. CRC Press.
- Smith, J. (2020). Fundamentals of Touch Screen Technology. Wiley.