Georgia Tech Research Institute

Displays: Issue 1 of 6

Issue: Glare makes it difficult for some users to see the display.

A user in a wheelchair, using a front approach to a kiosk, is unable to see the display because light from an overhead source is causing glare on the display, which is tilted upward for standing users.

Glare on display screens is a general usability issue for all users. However, standing users can more easily shield the display with their bodies or adjust their viewing angle to avoid glare, whereas users in wheelchairs may have more difficulty shielding the display or adjusting their viewing angle. Also, because seated users may be looking up at a display, glare from overhead lights may be more problematic.

Populations Impacted: Users with lower mobility impairments.

Potential Solutions:
  • Use an anti-glare display. Matte finish displays reduce glare by making the surface of the display less reflective. Chemical coatings can also be used to reduce glare.

  • Provide an adjustable angle display. If the vertical tilt angle of the display is adjustable, users can reposition the screen to reduce glare, instead of having to change their physical position relative to the screen.

  • A user in a wheelchair, using a front approach to a kiosk, has adjusted the angle of the machine's display, tilting it forward to reduce glare from an overhead light source.
  • Use a hood to shield the display. A hood over the display can block direct light that causes glare. However, a poorly designed hood might also block visibility for tall users.

  • A glare hood protrudes slightly over the top of the display, reducing glare on the display from an overhead light source for a user in a wheelchair.
  • Position the device in an area where glare is not an issue. Sunlight and overhead lighting are common sources of glare. If possible, position kiosks in areas where glare is less likely, such as an area that does not receive direct sunlight. Alternatively, reduce overhead lighting in the vicinity of the machine or direct it away from the display.

Applicable Guidelines:
Section 255 - 1193.41(b)(2)(a)
HFDS - 5.2.3
ISO/IEC 71 - 8.4.2, 8.4.4