43 results about "Dark state" patented technology

The invention discloses a display panel, electronic equipment and a driving method, and relates to the technical field of display. The display panel comprises a light emitting layer, a light filtering layer, a light control structure and an optical sensor, a pixel limiting structure of the light emitting layer is made of a light absorbing material, a light filtering unit of the light filtering layer is arranged opposite to a sub-pixel in position, and the light control structure is arranged corresponding to a sensing area in position; in the direction perpendicular to the display surface, at least part of the pixel limiting structures are opposite to the light control structures in position, and the optical sensors are used for receiving reflected light from the light control structures; under the condition that the optical sensor needs to be detected, the light control structure can reflect ambient light, so that the optical sensor can receive reflected light to complete detection; under the condition that dark state display needs to be carried out, the light control structure can enable ambient light to pass through and absorb the ambient light through the pixel limiting structure, so that reduction of local brightness of the sensing area is facilitated, and improvement of brightness uniformity of the display panel is facilitated.

The invention discloses a display panel and a display device, the display panel comprises a substrate, an active layer, an insulating layer, a filter layer and a first color resistance part, the active layer is located on the substrate, and the insulating layer is located on the side, away from the substrate, of the active layer. The insulating layer is provided with a first connecting hole, and the first connecting hole is exposed out of one end of the active layer. The light filtering layer is located on the side, away from the substrate, of the insulating layer, the light filtering layer comprises a light filtering part located in the first connecting hole, and the first color resistance part is arranged in the first connecting hole and located between the light filtering part and the active layer. And in the same first connecting hole, the color of the first color resistance part is different from that of the light filtering part. Therefore, the superposition of the first color resistance part and the light filtering part can form wide-spectrum absorption, and the range of an absorption wave band in the first connecting hole is enlarged, so that dark-state light leakage of the first connecting hole is reduced.

The application provides a display substrate, a preparation method thereof and a display device. The display substrate comprises a substrate, an encapsulation layer, a light filtering layer and an optical film layer. The encapsulation layer is located on the substrate, the light filtering layer is located in the encapsulation layer, and the light filtering layer comprises a black matrix. The black matrix comprises a black matrix opening. The optical film layer is located on a side of the encapsulation layer away from the substrate. The optical film layer is configured to partially transmit and partially absorb incident light. The light transmittance of the optical film layer is greater than that of the black matrix. The optical film layer comprises an optical film layer opening. The projection of the optical film layer opening on the substrate is located within the projection of the black matrix opening on the substrate. The technical scheme provided by the embodiment of the application can improve the dark state color separation phenomenon.

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.

The display panel comprises at least two light shielding layers, orthographic projections of light-transmitting openings in different light shielding layers on a driving back plate are mutually overlapped to form an overlapped area, and the shape of the overlapped area is changed by changing the relative positions of the light-transmitting openings in the different light shielding layers, so that the light-transmitting openings in the same type are not in the same type, and the light-transmitting openings in the same type are not in the same type. And overlapping areas of at least part of the light-transmitting openings are different in shape. The reflected light of the ambient light generates a destructive interference effect when passing through the overlapping areas of different shapes, so that a diffraction aperture formed by the reflected light of the ambient light is weakened or eliminated, and the color separation phenomenon generated in the visual effect when the display panel is in a dark state is improved. The invention further provides a display device comprising the display panel.

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.

The invention provides a preparation method of an electrochromic device and the electrochromic device prepared by the preparation method, and relates to the technical field of electrochromism. The method comprises the following steps: providing an electrochromic substrate; judging whether the electrochromic layer is in a first charge state or not; and when the electrochromic layer is in the first charge state, carrying out heating treatment or heating pressurization treatment on the electrochromic substrate to obtain the electrochromic device. By heating or heating and pressurizing the electrochromic layer which is already in the first charge state, a conjugated structure in the electrochromic layer can be fully enhanced, so that the absorption intensity of the electrochromic layer to a visible spectrum is increased, and the regularization degree of molecular arrangement in the electrochromic layer is improved. The electrochromic device prepared by the method has lower dark-state light transmittance, so that the overall contrast ratio of the electrochromic device is improved, and the optical performance of the electrochromic device is remarkably improved.

The invention discloses a preparation method of a high-contrast GHLC dimming device, and belongs to the field of functional liquid crystal material preparation. The problems that an existing GHLC technology is narrow in light transmittance adjusting range and low in dark-state haze are solved. The method comprises the following steps: 1, heating, stirring and mixing a dye, a liquid crystal material and an ion dopant to obtain a liquid crystal system; and 2, filling the liquid crystal system into a vertical alignment liquid crystal box. The manufacturing method is used for manufacturing the high-contrast GHLC dimming device.

According to the technical scheme, the dark-state low-light-transmittance dimming glass comprises dimming glass, the dimming glass comprises a first transparent substrate, a second transparent substrate, a first dimming film and a second dimming film, and the first dimming film and the second dimming film are arranged between the first transparent substrate and the second transparent substrate. A first laminated layer is arranged between the first transparent substrate and the first light adjusting film, a second laminated layer is arranged between the second transparent substrate and the second light adjusting film, a bonding layer is arranged between the first light adjusting film and the second light adjusting film, and the dark-state light transmittance of the light adjusting glass is smaller than or equal to 0.5%. According to the dimming glass, the dark-state light transmittance of the dimming glass is less than or equal to 0.5%, and the problem that the dark-state light transmittance of the conventional dimming glass is high is solved.

According to the technical scheme, the dark-state low-light-transmittance dimming glass comprises dimming glass, the dimming glass comprises a first transparent substrate, a second transparent substrate, a third transparent substrate, a first dimming film arranged between the first transparent substrate and the second transparent substrate and a second dimming film arranged between the second transparent substrate and the third transparent substrate, and a first adhesive layer is arranged between the first transparent substrate and the first dimming film. A second laminated layer is arranged between the second transparent substrate and the first light adjusting film, a third laminated layer is arranged between the second transparent substrate and the second light adjusting film, and a fourth laminated layer is arranged between the third transparent substrate and the second light adjusting film; the dark state light transmittance of the dimming glass is smaller than or equal to 0.5%. According to the dimming glass, the dark-state light transmittance of the dimming glass is less than or equal to 0.5%, and the problem that the dark-state light transmittance of the conventional dimming glass is high is solved.

The invention discloses an anti-noise image recognition method and system, and relates to the technical field of neuromorphic calculation, image recognition and brain-like hardware control, and the system comprises an input module, a noise estimation module, a controller module, a synaptic array module, a read-out / classification module, a near-infrared erasure reset module and a one-way electric rewrite-in calibration module. The synaptic array has the characteristics of electrical stimulation one-way programming-near-infrared light erasure reset; according to the method, the noise density of an input image is calculated, and a result and confidence are obtained through initial reasoning of a synaptic array; when the noise density is larger than or equal to a preset noise density threshold value or the confidence coefficient is smaller than or equal to a preset confidence coefficient threshold value, triggering a near-infrared light erasing reset array, applying single-polarity electric pulse calibration in a dark state, and then reasoning output, a selectable grading strategy and a voting mechanism; according to the scheme, closed-loop reset calibration is formed, recognition robustness and long-term stability under medium and high noise are improved, end side energy consumption is reduced, and the method is suitable for a low-power-consumption visual recognition scene.

The invention provides a dark-state charged exciton fluorescence emission device and a preparation method thereof. The dark-state charged exciton fluorescence emission device comprises a substrate, a metal layer, a two-dimensional semiconductor layer and a silver nanowire, wherein the contact part of the two-dimensional semiconductor layer and the silver nanowire is made of a single-layer two-dimensional material, and the metal layer and the silver nanowire form a vertically stacked plasmon nano resonant cavity; the plasmon nano resonant cavity is used for generating a resonance electromagnetic field enhancement effect under the action of an excitation light field so as to induce dark-state charged excitons in the two-dimensional semiconductor layer to realize fluorescence emission; the device provided by the invention is simple in structure and clear in layout of each layer, and the structural complexity and the preparation difficulty are reduced; meanwhile, a vertically stacked plasmon nano resonant cavity is formed through the metal layer and the silver nanowires, a resonance electromagnetic field enhancement effect can be generated by means of an exciting light field, an external electric field or magnetic field does not need to be relied on, and the use condition and the test equipment requirement are simplified.

The present application provides a polarizer and a display device. The polarizer is fixed to one side of a display panel. The polarizer includes a polarizing layer and at least one functional layer stacked on the polarizing layer. The functional layer is added with a light absorber to reduce transmittance of light with a predetermined wavelength. This can effectively solve a problem that a color temperature of the display panel drops greatly after irradiation of the light of the predetermined wavelength. The present application also improves viewing angles and relieves color shift and dark-state light leakage.

The present application relates to the technical field of photoelectrochemical performance analysis, and discloses a method for quantitatively analyzing photoelectrochemical performance based on polarization potential calibration, which comprises the following steps: (1) in a three-electrode system, photo-induced OCP of a semiconductor electrode with a photoelectric functional coating is tested under solution environment and light, and a photo-induced polarization curve of the semiconductor electrode is obtained; (2) in a three-electrode system, dark-state OCP of the semiconductor electrode is tested under solution environment and closed light, and a dark-state polarization curve of the semiconductor electrode is obtained; (3) according to the photo-induced polarization curve and the dark-state polarization curve, a semi-logarithmic polarization curve, a current density-potential curve, a ΔE-i curve and a ΔE-Δi curve are obtained; and (4) photoelectrochemical performance of the semiconductor electrode is analyzed according to the curves. The method can directly characterize actual photo-induced current density of the photoelectric functional coating and quantitatively analyze electrochemical performance thereof.

The invention relates to the technical field of photoelectric detector testing, and discloses a tester photoconductive signal linearity standard evaluation method, which comprises the following steps: configuring an independent driving narrow-band light source coupled to an integrating sphere, and constructing a binary weighted luminous flux synthesis environment; measuring a thermal time constant of the detector, defining a test period including a measurement time slot and a thermal compensation time slot, and setting single-period target total dissipated energy; starting a light source combination according to the binary control code, and collecting transient response current under the condition that constant measurement bias voltage is applied to maintain the constant electric field in the detector; calculating an energy gap based on an energy conservation principle, applying a dynamic compensation voltage pulse in a thermal compensation time slot to execute dark-state thermal injection, and maintaining the lattice temperature of the detector to be constant; and traversing the full dynamic range, and calculating the linearity deviation by using a superposition principle. The total dissipated energy of the detector in the testing process is kept constant through a time division multiplexing electric heating compensation mechanism.

The invention discloses a device and method for optimizing the output performance of a photoconductive switch based on vortex light. The device comprises a laser, and a filter, a focusing lens, a spiral phase plate and the photoconductive switch are sequentially arranged in the light beam propagation direction of the laser. The output end of the laser is coaxially aligned with the light-in surface of the spiral phase plate, and the light-out surface of the spiral phase plate is coaxially aligned with the gap area of the photoconductive switch. The method comprises the following steps: adjusting the height and horizontal position of each component to ensure that a light source is coaxial and a light beam sequentially passes through a laser window, a focusing lens and a photoconductive switch gap center at the center of a spiral phase plate; the laser is started to output Gaussian laser, the Gaussian laser is converted into vortex light through the spiral phase plate, the vortex light enters a semiconductor substrate area corresponding to an electrode gap of the photoconductive switch, photon-generated carriers are excited to be generated in the substrate, the photoconductive switch is converted into a conduction state from a dark state and a high-resistance state, and voltage is output. The problem that the output amplitude of the photoconductive switch is slightly improved by Gaussian light in the prior art is solved.

The application relates to a control method, device and equipment of an intelligent eyeshade and a storage medium, the method comprising the following steps: acquiring an eye opening and closing state of a target user through a biological sensor of the intelligent eyeshade, acquiring ambient light intensity information through a light sensor of the intelligent eyeshade, determining a target screen mode according to the eye opening and closing state, and gradually adjusting a display screen light transmission coefficient of the intelligent eyeshade according to the target screen mode and the ambient light intensity information, so that when the eye closing state is detected, the display screen light transmission coefficient of the intelligent eyeshade is gradually adjusted in combination with the ambient light intensity information, the display screen is switched from a light transmission mode to a light shielding mode, and the user is helped to quickly shield light and fall asleep; and when the eye opening state is detected, the display screen light transmission coefficient is gradually adjusted in combination with the ambient light intensity information, light received by the eye is gradually switched from a dark state to a state synchronous with ambient light, a gradually changing visual experience is provided for the user, and the use experience of the user is improved.

The embodiment of the invention provides a display panel, a driving method thereof and a display device, the display panel comprises a plurality of sub-pixels, each sub-pixel comprises a pixel circuit and a light-emitting device which are electrically connected, the sub-pixels in the ith row comprise a plurality of sub-pixels arranged in the first direction, the sub-pixels in the multiple rows are arranged in the second direction, the second direction intersects with the first direction, i is any positive integer; one work cycle of the pixel circuit comprises a reset stage, a data writing stage and a light emitting stage, in the reset stage and / or the data writing stage of the (i + 1) th row of sub-pixels, the i th row of sub-pixels are in the light emitting stage, and the (i + 2) th row of sub-pixels are in the light emitting stage. According to the display panel and the display device, multiple rows of sub-pixels in the same area cannot be darkened at the same time, the dark state significance of dark state sub-pixel rows can be reduced, the brightness difference recognized by human eyes is weakened, and the eye protection function of the display panel is achieved.

The present application relates to the technical field of electrochromics, and provides an electrochromic device manufacturing method and an electrochromic device manufactured thereby. The method comprises: providing an electrochromic substrate; determining whether an electrochromic layer is in a first state of charge; and when the electrochromic layer is in the first state of charge, heating the electrochromic substrate or heating and pressurizing the electrochromic substrate to obtain an electrochromic device. By heating or heating and pressurizing the electrochromic layer already in the first state of charge, a conjugated structure inside the electrochromic layer can be fully strengthened, thereby increasing the absorption intensity of the electrochromic layer for a visible spectrum, and improving the orderliness of arrangement of molecules in the electrochromic layer. The electrochromic device manufactured by the method has lower dark-state light transmittance, thereby improving the overall contrast of the electrochromic device, and significantly improving the optical performance of the electrochromic device.

According to the technical scheme, the steady-state low-light-transmittance dimming film comprises a dimming film body and is characterized in that the dimming film body comprises a first transparent substrate, a first transparent conducting layer, an active layer, a second transparent conducting layer and a second transparent substrate which are sequentially arranged in a stacked mode, and the dark-state light transmittance of the dimming film body is smaller than or equal to 0.5%. The dimming glass can achieve the effect of steady-state low light transmittance, and has the characteristics of good light shielding and transmitting performance and good privacy, so that the application field of the dimming glass is expanded.

The invention provides a Kelvin probe force microscope-based potential measurement method and a related device. A laser output light path of a laser and an original illumination light path of an AFM main body are physically coaxial through a switching interface of a light path coupling assembly; a collimating mirror is additionally arranged at the tail end of an AFM illumination light path to ensure that laser is collimated light and covers a probe-sample contact area, then a photosensitive material sample is fixed to a sample table after being cleaned and dried, then a laser excitation module and a KPFM control unit are started, laser parameters are adjusted in real time, surface potential data are synchronously collected, and the surface potential data are obtained. And generating a time-potential curve or a space potential distribution diagram. Accurate focusing of laser beams, precise in-situ detection of a sample microcell and standardized parameter regulation and control can be realized through optical path physical coaxiality and the collimating mirror, and the problems that a traditional KPFM can only measure the dark-state surface potential of a photosensitive material and no in-situ measurement professional equipment is provided for the photo-generated surface potential under laser irradiation are solved. And meanwhile, the problem of difficulty in externally introducing a light source is solved.

A photoconductive switching device with a waveguide structure belongs to the field of power semiconductors, and comprises a dark-state high-resistance photosensitive substrate which serves as a functional area of a photoconductor and a core layer of an optical waveguide at the same time; the high-reflectivity front electrode and the high-reflectivity back electrode are formed above and below the substrate; the side surface reflection increasing film is formed on the side wall of the substrate; and the waveguide coupling window is arranged on the substrate and is used for coupling light emitted by the trigger light source into the substrate at an angle greater than a critical angle of total reflection of a substrate material, so that a light beam is transversely conducted in the substrate. The effective optical path of the photoconductive switching device for extrinsic wavelength is greatly prolonged, sufficient absorption of incident light is guaranteed, the light responsivity and light current of the device are effectively improved, the on-resistance is reduced, and the problem of mismatch of a photoelectric field caused by light blocking of electrode metal of a traditional photoconductive device is solved; the problem of electric field concentration caused by an optical surface microstructure is avoided, and the blocking capability of the device is improved.

The present application relates to a liquid crystal composition, which can provide a liquid crystal cell and a variable transmittance device with excellent see-through performance in a dark state, improved clarity, and excellent durability.

The invention provides a photoelectric detector with U-shaped potential, and relates to the technical field of photoelectric detection. The photoelectric detector comprises a substrate layer, an N-type channel layer and a P-type photosensitive structure layer which are sequentially stacked from bottom to top, a first electrode layer and a second electrode layer for applying bias voltage are arranged on the two sides of the N-type channel layer, and the voltage applied to the first electrode layer is larger than that applied to the second electrode layer, so that a U-type potential surface with an opening facing the P-type photosensitive structure layer is formed in the N-type channel layer; the U-shaped potential surface is in a potential distribution form which is formed under the combined action of hole injection from the P-type photosensitive structure layer to the N-type channel layer and non-uniform distribution of conductivity in a channel, wherein the potential in the middle is lower than the potential on the two sides of the U-shaped potential surface. According to the invention, the U-type potential distribution is constructed in the N-type channel layer, effective suppression of carrier transport in a dark state is realized, and a conduction channel is rapidly established under an illumination condition, so that the response speed and responsivity of the photoelectric detector are improved while the dark current is reduced.

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 present disclosure concerns an illumination system, comprising a LC SLM comprising LC pixels, a light source comprising a plurality of point light sources configured to emit a plurality of spatially separated and / or sequentially in time input light beams that are projected on the LC SLM with different angles of incidence relative to an optical axis, and an output polarizer having an output transmission axis. The illumination system further comprises an input polarization component configured to set an input SOP to the input light beam and, in the dark state configuration of the illumination system, orient the input SOP of the input light beams parallel to the extraordinary axis of the LC pixel, such that the output SOP of the output light beams perpendicular to the polarization axis of the output polarizer. The present disclosure further concerns a light field near-eye display comprising the illumination system.

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 a liquid crystal composition. The liquid crystal composition of the present application can provide a liquid crystal cell and a transmittance variable device having excellent durability as well as excellent see-through performance in a dark state.

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.