An input device according to one or more embodiments may include a light guide plate configured to direct light entering from a light source so that the light exits from a light emitting surface and forms an image in a space, the image being an object for an input action from a user; a sensor configured to detect an object employed by a user for the input action; an input detection unit configured to detect an input from a user on the basis of a detection result from the sensor for the object; and a notification unit configured to notify a user that the input was detected when the input detection unit has detected an input from a user. The sensor may be placed in a space opposite the light emitting surface of the light guide plate.

An optical device includes a light-guiding plate that guides light in a plane parallel to an emission surface that emits light, and a sensor for detecting an object located on an emission surface side using light that passes through a back surface opposite to the emission surface and through the emission surface. The light-guiding plate has light convergence portions that receive light guided by the light-guiding plate and each have optical surfaces that cause light to be emitted from the emission surface in directions in which the light substantially converges at or scatters from one convergence point or one convergence line in a space, and the convergence points or the convergence lines for the light convergence portions are different from each other, and an image is formed in the space on the emission surface side by a collection of the convergence points or the convergence lines.

According to an aspect, a detection device includes: a substrate that has a detection region; a plurality of photodiodes provided in the detection region; a plurality of lenses provided so as to overlap the respective photodiodes; and a plurality of dummy lenses that are provided in a peripheral region between an outer perimeter of the detection region and edges of the substrate and are provided so as not to overlap the photodiodes.

According to an aspect, a detection device includes: a substrate that has a detection region; a plurality of photodiodes provided in the detection region; a plurality of lenses provided so as to overlap the respective photodiodes; and a plurality of dummy lenses that are provided in a peripheral region between an outer perimeter of the detection region and edges of the substrate and are provided so as not to overlap the photodiodes.

An electronic device has a touch panel configured to detect a touch position; and a controller configured to detect the touch position with greater precision in a first area that includes the touch position than in a second area that is different from the first area.

A display device includes a solar cell unit contains an organic-inorganic hybrid perovskite compound and avalanching nano particles to absorb light of small energy and emit light of greater energy, so that a light conversion efficiency of a solar cell can be increased, and the solar cell unit includes an opening for opening sub-pixels and light emitted from the sub-pixels may be emitted to the outside through the opening, so that a decrease in light transmittance caused by the solar cell can be reduced and light transmittance of the display device can be increased.

A display apparatus includes a first casing including a first screen including a first touch sensor to receive a finger input and a second casing including a second screen including a second touch sensor to receive a pen input. As the first casing and the second casing are overlapped with each other, the first screen and the second screen overlap with each other.

A pair of eyeglasses has a frame and lenses mounted on the frame. A computer processor is mounted on eyeglasses together with a plurality of cameras and a digital projection system. IR sensors and/or dual zoom cameras may also be mounted on the glasses and configured to track the movement of the user's hand.

A detection circuit is provided herein, which includes a first transistor, a second transistor, a third transistor, a light sensor, a capacitor, and a fourth transistor. The first transistor has a control terminal, a first terminal, and a second terminal. The second transistor is coupled to the control terminal. The third transistor is coupled to the control terminal and the second terminal. The light sensor is coupled to the control terminal. The capacitor is coupled to the control terminal. The fourth transistor is coupled to the second terminal.

A touch panel is provided. The touch panel includes a first substrate and a luminous flux adjusting portion. The first substrate has a top surface, in which the top surface has at least one semi-transparent area. The luminous flux adjusting portion is disposed on the first substrate and located in the at least one semi-transparent area, in which the luminous flux adjusting portion has a continuous light-impermissible pattern. Embodiments of the present invention uses the luminous flux adjusting portion to control the luminous flux of the semi-transparent area for achieving good consistence and adjustability of the luminous flux of the semi-transparent area.