System for improvement of the perceived FOS homogeneity by suppressing hotspots in a module design with a short LED to active area distance
The present invention discloses a system for displaying images, comprising: a light source; a panel including an active area and a peripheral area; a light guide being located at one side of the light source and under the panel, the light guide having a first side facing the panel and a second side opposite to the first side; and a plurality of optical foils, each foil disposed on the first or second side of the light guide, wherein at least one of the optical foil has a hotspot-reducing area in the peripheral area in order to reduce or eliminate a hotspot in front of the light source, wherein the hotspot-reducing area is a cut-out area, a covered area, or combinations thereof.
1 . A system for displaying images, comprising:
a light source;
a panel including an active area and a peripheral area;
a light guide being located at one side of the light source and under the panel, the light guide having a first side facing the panel and a second side opposite to the first side; and
a plurality of optical foils, each foil disposed on the first or second side of the light guide, wherein at least one of the optical foil has a hotspot-reducing area in the peripheral area in order to reduce or eliminate a hotspot in front of the light source, wherein the hotspot-reducing area is a cut-out area, a covered area, or combinations thereof.
2 . The system of claim 1 , wherein the hotspot-reducing area is in the proximity of the light source.
3 . The system of claim 1 , wherein the light source is an LED.
4 . The system of claim 1 , wherein the hotspot-reducing area is rectangular, half-circular, or of any other shape.
5 . The system of claim 1 , wherein the hotspot-reducing area is a covered area, wherein the covered area is a darkened area, a blackened area, a masked area, or combinations thereof.
6 . The system of claim 1 , wherein the optical foil with the hotspot-reducing area is a transparent foil or a reflective foil.
7 . The system of claim 1 , wherein the plurality of optical foils comprise a prism and a diffuser disposed on the first side of the light guide, wherein at least one of the prism and diffuser includes the hotspot-reducing area.
8 . The system of claim 1 , wherein the plurality of optical foils comprises a prism and a diffuser disposed on the first side of the light guide, and a reflector disposed on the second side of the light guide, wherein at least one of the prism, diffuser, and reflector includes the hotspot-reducing area.
9 . An electronic device, comprising:
the system of claim 1 ; and
an input unit operatively coupled to the system to provide input to the system for displaying images.
10 . The electronic device of claim 9 , wherein the electronic device is a mobile phone, digital camera, PDA (personal digital assistant), notebook computer, desktop computer, television, GPS (global positioning system), car display, aviation display, digital photo frame or portable DVD player.
11 . A light system, comprising:
a light source;
a light guide being located at one side of the light source,
the light guide having a first side and a second side opposite to the first side; and
a plurality of optical foils, each foil disposed on the first or second side of the light guide, wherein at least one of the optical foil has a hotspot-reducing area in the peripheral area in order to reduce or eliminate a hotspot in front of the light source, wherein the hotspot-reducing area is a cut-out area, a covered area, or combinations thereof.
12 . The light system of claim 11 , wherein the hotspot-reducing area is in the proximity of the light source.
13 . The light system of claim 11 , wherein the light source is an LED.
14 . The light system of claim 11 , wherein the hotspot-reducing area is rectangular, half-circular, or of any other shape.
15 . The light system of claim 11 , wherein the hotspot-reducing area is a covered area, wherein the covered area is a darkened area, a blackened area, a masked area, or combinations thereof.
16 . The light system of claim 11 , wherein the optical foil with the hotspot-reducing area is a transparent foil or a reflective foil.
17 . The light system of claim 11 , wherein the plurality of optical foils comprise a prism and a diffuser disposed on the first side of the light guide, wherein at least one of the prism and diffuser includes the hotspot-reducing area.
18 . The light system of claim 11 , wherein the plurality of optical foils comprises a prism and a diffuser disposed on the first side of the light guide, and a reflector disposed on the second side of the light guide, wherein at least one of the prism, diffuser, and reflector includes the hotspot-reducing area.