Learn all about touch types, brightness, backlights, color depths, and more. We've created a key terms and definitions library to guide you along your lcd technology search.
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LCD displays have various touch technologies, including:
LCD brightness is measured in millicandles of luminance per square meter, also known as "nits". Serious specifices a "minimum typical" brightness for each display, meaning that the described LCD has a typical luminance specification at least that amount. LCD brightness is measured at the LCD's initial power-up. See backlight longevity, below, for how LCD backlights degrade over time.
LCD backlight lifetime is a function of the specific LEDs selected for the backlight, and is measured in thousands of hours. If the backlight is maintained at 100% full power (at 25C) from initial LCD powerup fresh from the Serious factory, the typical brightness after that many hours will be typically 50% of its initial luminance.
Color LCDs get darker when operated below the minimum temperature range, and respond more sluggisly to visual changes. At higher temperatures, LCDs get washed out. At certain temperature extremes, the LCD driver chips may not function at all. The LCD temperature range is the minimum range where the LCD is deemed to perform acceptably without factoring in any backlight warming. LCD backlights do generate (when fully powered) several degrees of heat that can help obtain better LCD functionality at the low end of the LCD specification.
Note this range does not mean the SIM will cease functioning necessarily. Most SIMs are rated at -40 to +80C, so it is possible the SIM can continue to function even if the LCD is not visible to the user.
This is the number of bits the LCD uses to represent one pixel. There is often a GUI performance penalty for going above 16 bits because 4 bytes (vs. 2) have to be used to represent a pixel on the driver MCU and typically this impacts memory and performance (or, alternatively, the power of the MCU required to deliver equivalent performance). Serious Gatling(tm) Techology, implemented on the SIM231 and SIM115 delivers full 24 bit color at better performance that the corresponding (for example) SIM225 without SGT. Unless your GUI has extensive large shading gradients, 16-bit is almost always adequate for most applications.
LCD technology is rapidly evolving. There are several types of "viewing technology" now available. Some are a function of the raw LCD glass fabrication process, others a result of optically bonded techniques. Viewing angle is measured based on the 4 directions of deflection from straight-on viewing like this:
*Serious reserves the right to substitute LCD products that meet or exceed this specification.