Display device and light sensing system

A light sensing system comprising:

• a display device comprising:
• a display module;
• and
• a pattern layer formatted on a viewing surface of the display device and being made of at least one optical material selected from material capable of absorbing invisible light and material allowing partial invisible light, emitted from the display module, to pass through and the pattern layer,
• wherein the optical material of the pattern layer has position-specific invisible light transmittance;
• and
• a pointing device comprising:
• a light sensing unit for selectively sensing the invisible light from the display module that passes through the pattern layer,
• wherein the invisible light from the display module passing through the pattern layer represents at least one predetermined pattern associated with a specific position on the pattern layer.

A display device comprising:

• a display module;
• and
• a pattern layer formatted on a viewing surface of the display module and being made of optical material selected from at least one material capable of absorbing invisible light and material allowing partial invisible light emitted from the display module to pass through;
• wherein the optical material of the pattern layer has locational varying invisible light transmittance,
• wherein the invisible light from the display module passing through the pattern layer of varying locational invisible light transmittance represents at least one predetermined pattern for defining a specific position on the pattern layer.