9. DEVICE FRONT
9.6.3 Acceptance criteria for LCD pixel errors
The following table specifies the acceptance criteria for bright and dark pixels in the viewing area of the
touchscreen.
Pixels Note Acceptable quantity
Bright pixels 0
Dark pixels ≤ 4
Total number of bright pixels and dark pixels
≤
4
Bright adjacent pixels 1 0
Dark adjacent pixels 1 ≤ 2
Adjacent pixels with a bright pixel and a dark pixel 1 0
Note 1 Examples of two adjacent pixels: and
9.7 Cleaning
To clean the device, consider the following instructions:
• Use a soft, lint-free cloth (for example, soft cotton or microfiber cloth). Do not use paper towels or paper
tissues (they contain wood fibers and will scratch the plastic surface).
• The cloth may be used dry, or lightly dampened (not wet) with water.
• Wipe the surface gently, do not use excessive force.
• If needed, a mild and pH neutral cleaner can be used.
• Do not use acidic/alkaline cleaners or organic chemicals such as paint thinner, acetone, toluene, xylene,
propyl alcohol, isopropyl alcohol, or kerosene.
• Do not apply a cleaner directly to touch panel or any other surface. In case a cleaner is spilled onto the
device, soak it up immediately with absorbent cloth.
Use of inappropriate cleaners or cleaning methods can result in optical degradation of the touchscreen/pro-
tection glass and/or affect its functionality.
© TTControl GmbH 2024. All rights reserved.
Proprietary Information
41
Document Number:
D-156-G-02-003
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