A display device includes a display panel; a temperature information acquisition unit that acquires peripheral temperature information on a periphery of the display panel; and a control unit that controls drive current to be supplied to the display panel. The control unit controls the drive current to be supplied to the display panel to a first drive current value when a peripheral temperature indicated by the peripheral temperature information is within a prescribed temperature range, and a second drive current value lower than the first drive current value when the peripheral temperature indicated by the peripheral temperature information is higher than the prescribed temperature range.

An eyepiece for projecting an image to an eye of a viewer includes a waveguide configured to propagate light in a first wavelength range, and a grating coupled to a back surface of the waveguide. The grating is configured to diffract a first portion of the light propagating in the waveguide out of a plane of the waveguide toward a first direction, and to diffract a second portion of the light propagating in the waveguide out of the plane of the waveguide toward a second direction opposite to the first direction. The eyepiece furthers include a wavelength-selective reflector coupled to a front surface of the waveguide. The wavelength selective reflector is configured to reflect light in the first wavelength range and transmit light outside the first wavelength range, such that the wavelength-selective reflector reflects at least part of the second portion of the light back toward the first direction.

A flexible substrate is provided, and the flexible substrate includes a second organic layer, a first inorganic layer, a first organic layer, and a second inorganic layer, which are sequentially stacked. A surface, which is in contact with the first organic layer, of the first inorganic layer has a first groove. A surface, which is in contact with the first inorganic layer, of the second organic layer has a second groove. A surface, which is in contact with the second inorganic layer, of the first organic layer has a third groove. In a direction perpendicular to the first inorganic layer, any two of the first groove, the second groove and the third groove at least partially are not aligned with each other. A manufacturing method of the flexible substrate, a panel including the flexible substrate, and an electronic device including the flexible substrate are also provided.

An eyepiece includes a planar waveguide having a front surface and a back surface. The eyepiece also includes a grating coupled to the back surface of the planar waveguide and configured to diffract a first portion of the light propagating in the planar waveguide out of a plane of the planar waveguide toward a first direction and to diffract a second portion of the light propagating in the planar waveguide out of the plane of the planar waveguide toward a second direction opposite to the first direction and a wavelength-selective reflector coupled to the front surface of the planar waveguide. The wavelength-selective reflector comprises a multilevel metasurface comprising a plurality of spaced apart protrusions having a pitch and formed of a first optically transmissive material and a second optically transmissive material disposed between the spaced apart protrusions.

A GOA circuit and a display panel are disclosed. The GOA unit includes a plurality of stages of cascaded GOA units. Each GOA unit includes a pull-up control module, a pull-up module, a down transmission module, a pull-down remaining module, a pull-down module and a bootstrap capacitor. The pull-up module is deployed with two thin-film transistors, to which different oscillating signals are inputted, having individual output ports. The two transistors can operate alternatively for reducing the time a single thin-film transistor operates, lowering the shift of a threshold voltage and extending a lifespan of the device.

Display units for digital out of home advertising with orientation-based operations adjustment and related methods are provided. The display unit includes an electronic display. A controller for the display unit receives orientation data from an orientation detection device, determines an orientation of the display unit, and adjusts operations of the display unit based, at least in part, on the orientation.

An embodiment relates to a method of measuring an ambient temperature by using a temperature sensor provided in an integrated circuit (IC) and a measurement error of a temperature sensor may be improved by correcting an output value of a temperature sensor by using a correction value stored in a memory.

A display apparatus and a method for controlling the same are provided. The display apparatus includes a display unit, a light sensor, a cooling fan, and a controller. The light sensor is configured to detect an ambient light and generate a brightness value indicating brightness of the ambient light. The cooling fan is configured to generating a fluid flow in the display apparatus. The controller is configured to monitor the brightness value per a time period and control a rotational speed of the cooling fan based on the brightness value.

A display device includes a display panel including a sub-pixel for displaying an image, a data driver configured to apply a data voltage to a data line of the sub-pixel, and a scan driver configured to apply a gate signal to a gate line of the sub-pixel. A gate voltage of the gate signal is compensated based on a sensing voltage sensed from the sub-pixel.

Provided is a display device including: a display panel including data lines extending in a vertical direction of a two-dimensional screen and each connected to a pixel for displaying one of multiple primary colors; and a data driver that supplies gradation data signals having voltage values corresponding to a brightness level of each pixel based on an image signal to the display panel via output terminals, and performs a time division drive on the data lines in a first to M-th division periods of each horizontal scanning period in the image signal. The display panel includes a time division switch for every M data lines to which the pixels for displaying a same primary color are connected, and the time division switch sequentially selects the M data lines one by one in each of the first to M-th division periods and connects the selected data line to one output terminal.