A electronic method, includes receiving, by a graphene structure, a microwave signal. The microwave signal has a driving voltage level. The electronic method includes generating, by the graphene structure, optical photons based on the microvolts. The electronic method includes outputting, by the graphene structure, the optical photons.

A backlight module includes a back plate, a diffuser opposite to the back plate, a plurality of dot light sources arranged on a surface of the backplate facing toward the diffuser in a matrix, thermal emitters configured between the dot light sources, and an optical film configured on the surface of the diffuser facing away the backplate. In addition, the present disclosure also relates to a liquid crystal panel and a liquid crystal device (LCD). The backlight module radiates infrared rays toward the liquid crystal panel, and the liquid crystal within the liquid crystal panel may convert the infrared rays into heat. That is, the absorbed rays may be converted into thermal energy heating up the liquid crystal panel. Thus, even at a low temperature, the LCD may function normally.

A long-range electrochromic fiber for infrared camouflage and preparation method thereof are disclosed. The method includes: coating indium tin oxide dispersion, electrolyte solution, and electrochromic material on the surface of the metal fiber sequentially, and preparing counter electrodes and polymer protective layer on the outside of the electrochromic layer to obtain the long-range electrochromic fiber. The obtained long-range electrochromic fiber can realize the regulation of infrared emissivity, can be continuously prepared for more than 100 meters and has a good application prospect in infrared camouflage, wearable display, etc.

The high-pixel-count uncooled thermal imaging arrays disclosed herein have liquid crystal (LC) microcavity transducers separate from the read-out integrated circuit (ROIC). The transducer converts incident infrared (IR) radiation in birefringence changes that can be measured with visible light. In other words, the system uses the temperature sensitivity of the LC birefringence to convert the IR scene to a visible image. Measurements on sample arrays indicate that the LC material quality is similar to that of bulk samples and has good noise performance. Additionally, high-fill-factor arrays on fused-silica substrates may be processed to enable optimization of conditions for greatly improved temperature sensitivity. An additional IR absorber layer may be integrated into the process to tune the structure for the infrared.

A nonlinear crystal including stacked strontium tetraborate SrB.sub.4O.sub.7 (SBO) crystal plates that are cooperatively configured to create a periodic structure for quasi-phase-matching (QPM) is used in the final frequency doubling stage of a laser assembly to generate laser output light having a wavelength in the range of about 180 nm to 200 nm. One or more fundamental laser beams are frequency doubled, down-converted and/or summed using one or more frequency conversion stages to generate an intermediate frequency light with a corresponding wavelength in the range of about 360 nm to 400 nm, and then the final frequency converting stage utilizes the nonlinear crystal to double the frequency of the intermediate frequency light to generate the desired laser output light at high power. Methods, inspection systems, lithography systems and cutting systems incorporating the laser assembly are also described.

Provided are a display panel and a display device, relating to the field of display technologies. The display panel includes a display substrate, a diffusion sheet, a transflective film, and a fingerprint identification circuit. Light of a target wavelength emitted by the fingerprint identification circuit may be reflected by an obstacle, and the light of the target wavelength reflected by the obstacle may be irradiated to the fingerprint identification circuit through at least one through hole in the diffusion sheet. The fingerprint identification circuit performs fingerprint identification according to the received light of the target wavelength reflected by the obstacle. Since an orthographic projection of the fingerprint identification circuit onto the display substrate is within a display area of the display substrate, the fingerprint identification circuit can be prevented from occupying a non-display area of the display substrate. Therefore, the non-display area can be small, and thus, the display device has a relatively high screen-to-body ratio.

A display device including a rear chassis, a display panel arranged in front of the rear chassis to display an image, a middle mold arranged between the display panel and the rear chassis and coupleable to the rear chassis, an optical member arranged between the rear chassis and the display panel, and a welding portion formed by laser-welding the display panel and at least one of the middle mold or the optical member.

An electrochromic device is provided including a first substrate, a first electrode on the first substrate, a second substrate, a second electrode on the second substrate facing the first electrode, an electrochromic layer in contact with the first electrode, an anti-deterioration layer in contact with the second electrode facing the first electrode, and an electrolyte layer in contact with both the electrochromic layer and the anti-deterioration layer. At least one of the first electrode and the second electrode includes In.sub.2O.sub.3, and has an infrared light transmittance of 70% or more at a wavelength of 1,500 nm. The electrochromic layer includes a triarylamine-containing radical polymerizable compound represented by a specific formula.

Disclosed are a display screen module and a terminal device. The display screen module may include: a backlight module, an LCD screen arranged above the backlight module, a light-transmissible cover plate arranged above the LCD screen, a first light source arranged in a backlight light source of the backlight module, a reflective component arranged between the LCD screen and the cover plate, and a light-receiving module configured to receive light reflected by the reflective component so as to carry out fingerprint recognition.

A source of directional radiation in an IR band comprises at least a substrate and an external layer comprising controllable cells made of a metal insulator transition material that changes phase depending on its temperature relative to a temperature at which the corresponding wavelength is located in the IR band and that possesses a crystalline phase and an amorphous phase, and control means for controlling the phase change of the cells so as to form in this external layer a diffraction grating when the cells are controlled to the amorphous phase, in order thus to obtain a switchable directional source.