12 results about "Dark state" patented technology

The application is suitable for the field of optical technology, and provides an illumination system and a projection device. The illumination system comprises a light source device, a waveguide and a dynamic coupling-out device. The light source device is used for providing an illumination light beam. The waveguide comprises a coupling-in region and a coupling-out region. The illumination light beam is coupled into the waveguide through the coupling-in region and propagates inside the waveguide to the coupling-out region. The dynamic coupling-out device is arranged at the coupling-out region and is used for coupling out the illumination light beam from the coupling-out region of the waveguide. The dynamic coupling-out device comprises a plurality of sub-zones. The coupling-out efficiency of each sub-zone is adjustable. The dynamic coupling-out device with adjustable coupling-out efficiency of different sub-zones is applied to the projection device. By respectively controlling the coupling-out efficiency of each sub-zone, the sub-zone illumination function of the projection device can be realized, and the overall power consumption is reduced. Meanwhile, the sub-zone illumination can reduce the brightness of the dark-state pixels in the picture, thereby improving the contrast of the display picture and meeting the demand of HDR display.

The application provides a projection display device, an optical system and a manufacturing method thereof. The projection display device comprises a polarization splitting element, at least one image generating element and an optical compensation element. The polarization splitting element is configured to polarize an incident light beam into at least two different directions of outgoing light beams. The image generating element is located on the propagation path of the at least one outgoing light beam and is configured to modulate the outgoing light beam into information light based on image information. The optical compensation element is located between the polarization splitting element and the image generating element and allows at least part of the outgoing light beam and the information light to pass through. In this way, by arranging the optical compensation element allowing at least part of the outgoing light beam and the information light to pass through, multi-screen display under different projection distances can be achieved, the structure is simple, and the cost is low. Moreover, by arranging the optical compensation element, the dark state stray light can be reduced, thereby improving the overall contrast of the bright and dark areas of the projection display device.

A display substrate and a display device. The display substrate comprises a substrate and a color filter structure layer; the color filter structure layer comprises: a light extraction layer comprising a plurality of light extraction portions; a color filter layer comprising a plurality of color filters, parts of two adjacent color filters are located on the same light extraction portion away from the substrate and are both in contact with the surface of the light extraction portion away from the substrate; a black matrix layer located on the side of the color filter layer away from the substrate and comprising a plurality of black matrices; a plurality of improvement portions located on the side of the black matrix layer close to the substrate, and the plurality of improvement portions are arranged in pairs with the plurality of black matrices, the orthographic projection of the black matrix on the substrate is located within the orthographic projection of the improvement portion on the substrate, the surface of the improvement portion away from the substrate is in contact with the surface of the black matrix close to the substrate, and the difference between the surfaces of the improvement portion and the black matrix is less than or equal to 0.2 microns, which can solve the problems of large difference in black matrix pattern morphology and deterioration of dark state effect.

The application discloses a kind of photoelectric sensing data-driven internet of things terminal authentication method, specifically relates to internet of things terminal authentication field, for solving the problem of photoelectric physical fingerprint authentication failure under wide temperature range and variable light conditions;The original photoelectric response array matrix is read by responding to optical challenge excitation signal, and the first light shielding area and the second photosensitive area are divided in the unified coordinate system, the dark state discharge rate matrix is extracted in the first light shielding area, the light response decay characteristic is extracted in the second photosensitive area combined with exposure readout time difference, then the dark state discharge rate matrix is unfolded into heat distribution compensation matrix according to the heating topology layout coordinate, and the second photosensitive area is executed differential offset to form pure light response non-uniformity characteristic matrix, then light response decay characteristic and pure light response non-uniformity characteristic matrix are input into feature mapping model as same authentication input, and the terminal identity authentication state is determined according to the distribution distance measure of output.

The present application relates to the technical field of photoelectric detector testing, and discloses a standard evaluation method for linearity of photoconductive signals of a tester, comprising: configuring an independent driving narrow-band light source coupled to an integrating sphere to build a binary-weighted light flux synthesis environment; measuring a thermal time constant of a detector, defining a test cycle containing a measurement time slot and a thermal compensation time slot, and setting a single-cycle target total dissipated energy; opening a light source combination according to a binary control code, collecting instantaneous response current under the condition that a constant measurement bias voltage is applied to maintain a constant internal electric field of the detector; calculating an energy gap based on the principle of energy conservation, applying a dynamic compensation voltage pulse to perform dark-state thermal injection in the thermal compensation time slot, and maintaining a constant detector lattice temperature; traversing the full dynamic range, and calculating linearity deviation by using the superposition principle. The time-division multiplexing electrothermal compensation mechanism keeps the total dissipated energy of the detector constant during the testing process.

The application discloses an application of a tripyridyl triazine zinc bromide complex in preparation of a photoelectric / radiation detector and belongs to the technical field of semiconductor photoelectric materials and devices. The application opens up a new use of a known material, the tripyridyl triazine zinc bromide complex, and realizes regulation of carrier transport performance by using free radicals generated by photoinduced electron transfer (PIET) in the ZnBr2(2-TPT) complex for the first time, breaks through the traditional cognition that the material is only used for optical discoloration, and successfully applies the material to the field of electrical detection. The photoelectric / radiation detector based on the tripyridyl triazine zinc bromide complex has high-performance detection performance: the detector prepared based on the ZnBr2(2-TPT) complex has extremely low dark current (originating from high resistance of the material in a dark state) and significant photocurrent response, realizes high on-off ratio and high sensitivity, and can effectively detect weak ultraviolet light and high-energy X rays.

This application relates to a method, apparatus, device, storage medium, and program product for testing photovoltaic cells. The method includes: acquiring dark-state volt-ampere data of the cell under test in a dark environment, and acquiring light-state volt-ampere data of the cell under test in a light environment; determining, based on the light-state volt-ampere data, the candidate location range of recombination centers within the functional layers of the cell under test; and determining the distribution detection results of the recombination centers based on the dark-state volt-ampere data and the candidate location range. In the above method, the different volt-ampere data characteristics exhibited by recombination centers distributed in different functional layers of the cell under test are utilized, thereby enabling the detection of recombination centers by analyzing the volt-ampere data of the cell under test. Furthermore, based on a step-by-step approach of first initially determining the candidate location range and then further determining the distribution detection results within the candidate location range, the specific location of the recombination centers within the functional layers of the cell under test is obtained, improving the detection accuracy of recombination centers.

The application discloses a dense LED flicker frequency real-time interpretation method and system integrating jitter compensation and confidence evaluation, which is applied to the technical field of data processing.The application firstly performs gray-scale, contrast enhancement and denoising pretreatment on a continuous video stream, and then detects dense LEDs based on an improved YOLOv8 architecture, and judges the bright and dark states through the mean value of the V component of HSV and a dynamic threshold value.Subsequently, the coordinate is normalized and discretized, combined with DBSCAN clustering and cross-frame time sequence correlation to generate an LED time sequence track, linear interpolation is performed on the missing data, and binarization is performed, the flicker frequency is calculated through zero-crossing detection and sampling frame rate.Meanwhile, a double-factor confidence model is constructed to quantify reliability, and the optical flow method with adaptive computing power and coordinate correction are adopted to realize jitter compensation, and finally, the LED flicker frequency, state and confidence result are output.

This application discloses a projector including an illumination module, a reflective light valve, and a projection lens. The reflective light valve is configured in the transmission path of the illumination beam provided by the illumination module to convert the illumination beam into an image beam. The projection lens is configured in the transmission path of the image beam. The projection lens projects the image beam out of the projector to form an image. By adjusting the shape and angle of the multiple first microlenses of the first microlens array in the illumination module, the problem in existing projectors where reflected light enters the lens aperture when the upper part of the reflective light valve is not deflected, or where diffraction fringes from some of the reflective mirrors in a dark state enter the lens aperture, can be improved, thereby enhancing image contrast without excessively sacrificing image brightness.

An atomic object confined in a particular region of an atomic object confinement device is cooled using an EIT cooling operation from S to P to D. A controller associated with the atomic object confinement device controls a first steering source and a second steering source to provide a first steering signal and a second steering signal, respectively, to the particular region. The first steering signal is characterized by a first wavelength corresponding to a transition between an S manifold and a P manifold of a first component of the atomic object, and the S to P transition is detuned by a first detuning amount. The second steering signal is characterized by a second wavelength corresponding to a transition between the P manifold and a D manifold of the first component, and the P to D transition is detuned by a second detuning amount. The first detuning amount and the second detuning amount are selected to establish a dark state associated with a two-photon transition between the S manifold and the D manifold.

A glass assembly, a display method and a means of transportation are provided. The glass assembly comprises: a glass body; an active display layer arranged on a surface of the glass body for displaying an image and comprising one or more active display layers; and a light-cutoff layer comprising a plurality of light-cutoff regions, each light-cutoff region being configured to be switchable between a non-dark state and a dark state, and the light-cutoff layer comprising one or more light-cutoff layers, wherein each light-cutoff region corresponds to at least portion of the active display layer. In the glass assembly of the present disclosure, by providing the active display layer for displaying an image and combining with the light-cutoff layer having a plurality of light-cutoff regions, each light-cutoff region of the plurality of light-cutoff regions and / or the corresponding portion of the active display layer can be individually controlled according to different application occasions and user requirements, so that it can be realized to display the images in different regions, and the function of providing image display toward, for example, the outside and / or the inside of the vehicle can be realized.