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US 2014/0192006 A1Published application
Touch sensor integrated with a light guide
OwnerLakshman Rathnam, Kari Juhani Rinkoinventors
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Abstract
Various approaches discussed herein provide a display screen that integrates both capacitive touch sensing and a light guide onto a single optically clear substrate. The substrate can be integrated into a portable device, such as an electronic reader (e-reader) device having a reflective display in order to both illuminate content displayed on the e-reader device and to provide touch sensing input to the device. The capacitive sensors can be fabricated on one side of the optically clear substrate, while the light guide can be fabricated on the opposite side of the substrate.
Claims28
A computing device, comprising:
- a memory storing content;
- one or more processors configured to process the content stored in the memory;
- and
- a touch screen assembly for displaying the content processed by the one or more processors, the touch screen assembly including:
- a reflective display configured to display the content;
- a light source configured to emit light;
- and
- an optically transparent substrate positioned adjacent to the reflective display and oriented to receive the light from the light source into at least one edge of the optically transparent substrate, the optically transparent substrate having a first side and a second side,
- the first side of the optically transparent substrate including a plurality of capacitive sensors formed thereon, the capacitive sensors configured to detect touch input,
- the second side of the optically transparent substrate having one or more optical patterns formed thereon, the optical patterns configured to direct the received light from the light source onto the reflective display to illuminate the content being displayed on the reflective display.
7 more elements
A device, comprising:
- a display screen configured to display content;
- at least one light source;
- and
- a substrate positioned proximate to the display screen, the substrate having a plurality of sensors fabricated on a first side of the substrate, the sensors configured to provide touch sensing capability for the device, the substrate further having one or more optical patterns fabricated on a second side that is opposite with respect to the first side,
- wherein the one or more optical patterns is configured to direct light from the at least one light source onto the display screen so as to be reflected from the display screen, in order to illuminate the content being displayed on the display screen.
2 more elements
A device comprising:
- a display screen configured to display content;
- a light source;
- a substrate having a surface, the surface including one or more capacitive touch sensors and one or more optical patterns formed onto the one or more capacitive sensors, the one or more optical patterns directing light produced by the light source onto the display screen to illuminate the content being displayed on the display screen.
A method for fabricating a touch screen display, the method comprising:
- fabricating one or more capacitive sensors on a first side of an optically transparent substrate, the one or more capacitive sensors configured to detect one or more touches;
- forming one or more optical patterns on a second side of the optically transparent substrate, the one or more optical patterns configured to direct ambient light to a reflective display screen capable of displaying content;
- configuring one or more light emitting diodes (LEDs) to emit the ambient light to the optically transparent substrate;
- and
- positioning the reflective display screen adjacent to the optically transparent substrate such that the ambient light emitted by the one or more LEDs is used to illuminate the content displayed by the reflective display screen.
2 more elements
A computer implemented method for displaying content, the method comprising:
- under control of at least one computing device configured with executable instructions,
- displaying content on a touch screen interface that includes a reflective display and an optically clear substrate, the optically clear substrate including:
- a first side having a plurality of sensors deposited thereon, the sensors configured to provide touch sensing input;
- and
- a second side having one or more optical patterns deposited thereon, the one or more optical patterns configured to direct light onto the reflective display screen;
- and
- supplying ambient light to the optically clear substrate to illuminate the content displayed on the reflective display.
4 more elements
Dependencies are inferred from the claim text.