A display device includes: a display panel; a circuit board disposed on a lower surface of the display panel; and an adhesive layer disposed between the circuit board and the lower surface of the display panel. An area of the circuit board that has a roughness higher than a predetermined reference roughness does not overlap the adhesive layer.

A display apparatus includes a substrate; a first light-emitting diode (LED) disposed on the substrate that emits a first light; a second LED disposed on the substrate that emits a second light; a first capping layer disposed on the first LED; and a second capping layer disposed on the second LED that has optical characteristics that differ from those of the first capping layer.

An earbud includes a housing, a speaker mounted within the housing, a processor mounted within the housing, a user input surface on the housing, and a set of self-mixing interferometry (SMI) sensors mounted within the housing. The set of SMI sensors includes a first SMI sensor configured to emit a first beam of light, and a second SMI sensor configured to emit a second beam of light. The second beam of light passes through the user input surface about an axis that is non-perpendicular to the user input surface. The processor is configured to adjust a parameter of the speaker at least partly in response to a first SMI output of the first SMI sensor and a second SMI output of the second SMI sensor.

An earbud includes a housing, a speaker mounted within the housing, a processor mounted within the housing, a user input surface on the housing, and a set of self-mixing interferometry (SMI) sensors mounted within the housing. The set of SMI sensors includes a first SMI sensor configured to emit a first beam of light, and a second SMI sensor configured to emit a second beam of light. The second beam of light passes through the user input surface about an axis that is non-perpendicular to the user input surface. The processor is configured to adjust a parameter of the speaker at least partly in response to a first SMI output of the first SMI sensor and a second SMI output of the second SMI sensor.

To achieve an information output device in which information of a medium disposed on a stage surface can be surely and efficiently read out, and a stage effect and a security are high. In the information output device, media are disposed on a stage surface in a state where the media are opposite to the stage surface, the media where dot patterns are printed on medium surfaces on the basis of a predetermined rule, the dot patterns are read by imaging units disposed in a space below the stage and converted into code values or coordinate values indicating the dot patterns from photographed images obtained by the imaging units, and information corresponding to the code values or the coordinate values is outputted. Further, light transmitting reading holes are respectively provided at a plurality of medium disposing locations on the stage surface, and the imaging units are disposed in the space below the stage corresponding the respective reading holes such that the imaging units photograph the medium surfaces of the media disposed on the reading holes.

The present invention relates to an optical touch-sensitive device and a method of determining a position and determining a position change of an object contacting an optical touch sensitive device. In particular, the present invention relates to an optical touch pad and a method of determining a position and determining a position change of an object contacting an optical touch pad. A touch-sensitive device, according to the present invention may comprise a light source, a touch-sensitive waveguide, a detector array, and a first light redirecting member, wherein at least a part of the light propagating towards a specific point of the detector array is prevented from being incident upon the specific point of the detector array when an object contacts a touch-sensitive surface of the touch-sensitive waveguide at a corresponding specific contact point.

A display device, including: a display unit including a light emitting element that emits light, and a biometric information sensing unit disposed below the display unit, is provided, wherein the biometric information sensing unit receives light reflected by a biometric input, wherein the biometric information sensing unit includes: an optical system including a transmission part that passes the reflected light and an absorption part around the transmission part, wherein the absorption part absorbs the reflected light and pressure; a light detection sensor disposed below the transmission part of the optical system, wherein the light detection sensor receives the reflected light that passes through the transmission part; and a pressure detection sensor disposed below the absorption part of the optical system, wherein the pressure detection sensor detects the pressure that is transferred from the absorption part.

The present disclosure discloses a touch circuit, a touch substrate and a touch display device. The touch circuit includes a light sensing module arranged corresponding to a touch area and configured to, when the touch area receives light which meets a first preset condition, transmit a first signal transmitted via a signal input line as a sensing signal to a processor through a first sensing signal transmission line and a second sensing signal transmission line, respectively. The processor determines position information of the touch area based on a first sensing signal transmitted via the first sensing signal transmission line and a second sensing signal transmitted via the second sensing signal transmission line.

The present disclosure discloses a touch circuit, a touch substrate and a touch display device. The touch circuit includes a light sensing module arranged corresponding to a touch area and configured to, when the touch area receives light which meets a first preset condition, transmit a first signal transmitted via a signal input line as a sensing signal to a processor through a first sensing signal transmission line and a second sensing signal transmission line, respectively. The processor determines position information of the touch area based on a first sensing signal transmitted via the first sensing signal transmission line and a second sensing signal transmitted via the second sensing signal transmission line.

In one example, a system may include a display including a display screen; a display controller configured to display visual information on the display screen of the display screen, control at least portions of one or more pixels corresponding to the display screen to render the display screen transparent; and a depth camera, positioned behind the display screen, that is configured to obtain depth image information of one or more objects in front of the display screen when at least portions of the one or more pixels are rendered transparent.