82 results about "Brightness perception" patented technology

A correcting portion of an endoscope subjects a reference image to a magnification correction process so that the distance between a first mark and a second mark within the reference image is substantially equal to the distance between a first mark and a second mark within a comparative image. Next, the corrected reference image is subjected to a rotation correction process so that the orientation of the second mark with respect to the first mark within the reference image is substantially equal to the orientation of the second mark with respect to the first mark image within the comparison image. Further, the corrected reference image is subjected to a brightness distribution correction process so that the brightness distribution thereof becomes equal to that of the comparison image. The display state of the reference image and comparison image are made substantially equal, comparative diagnosis is facilitated, and diagnostic efficiency is improved.

The invention discloses an automatic exposure control method and device for imaging equipment. Each exposure parameter is divided into a plurality of sections, each section is called as a sub exposure line, and the sub exposure lines are sequenced and then combined to form a main exposure line of the imaging equipment. After the imaging equipment is turned on, the deviation between a current screen brightness and a target screen brightness is judged, the exposure parameters are adjusted according to the main exposure line of the imaging equipment if the deviation exists, and the exposure parameters are not adjusted if the current screen brightness is within the range of the target screen brightness. The automatic exposure control device for the imaging equipment comprises a control module, a brightness evaluation module and an exposure parameter adjusting module. The method and the device are universal, the exposure parameters can be adjusted into reasonable values under a normal lighting condition, imaging effects are optimized, the exposure parameters can be adjusted into maximum values under an extreme lighting condition, the imaging effects cannot be worse than those of a traditional scheme, and overexposure can be effectively suppressed.

A light emitting sheet module includes a light guiding sheet to cover a plurality of key switches, at least one LED disposed on at least one end portion of the light guiding sheet, and a circuit board disposed on the one end portion of the light guiding sheet on which the LED is disposed. When the light emitting sheet module is, mounted on a switch board, it is capable of adaptation to key switches in a wide variety of forms and to illuminate the key switches with light emission of high brightness.

The invention provides a mixed-light-source liquid-crystal projection light engine system. The portable liquid-crystal projection light engine system is composed of a light source module, a polarized light management module, an image signal module and a projection lens, wherein the light source module consists of a high-brightness laser, an incoherent LED (Light-Emitting Diode) solid light source, a fluorescent device and the like. The output brightness of the projection system is greatly increased, the light source module is safe and environmentally friendly, and projected images have bright color and clear quality. The polarized light management module consists of a color-combining prism, a polarization beam splitter (PBS), a polarization color-combining device and the like, and different polarization states of three-primary-color mixed light are integrated into the same polarized light to be emitted to the image signal module. The image signal module is a monolithic reflection type liquid crystal light modulation device, and image signals are loaded to the three-primary-color polarized light in sequence according to the image signals corresponding to primary colors. The projection lens is used for projecting the light carrying the image signals onto a screen.

The invention discloses a backlight brightness adjustment method and system for mobile terminals. The backlight brightness adjustment method includes: setting a first control strip and a second control strip which are used for adjusting backlight brightness in a display screen of the mobile terminals in advance; calculating backlight brightness values according to toughed positions on the first control strip and the second control strip when detecting that the first control strip and the second control strip are touched simultaneously; correspondingly adjusting the backlight brightness of the mobile terminals according to the backlight brightness values. The backlight brightness is adjusted by the arrangement of the two control strips, so that adjustment precision of the backlight brightness of the mobile terminals is higher, fine adjustment on the backlight brightness is realized, and great convenience is brought to users.

A backlight unit, comprising plural linear light sources, and an optical functional sheet, wherein a prism structure having plural prisms is formed on at least one surface of the optical functional sheet, and the values of (H_n−1+H_n)/(A_n−A_n−1) are approximately equivalent, wherein, in a brightness distribution graph that expresses a brightness distribution in the optical functional sheet, A₁ is a peak site and H₁ is a peak height of a first virtual image, A₂ is a peak site and H₂ is a peak height of a second virtual image adjacent to the first virtual image, . . . , A_n is a peak site and H_n is a peak height of (n)th virtual image adjacent to (n−1)th virtual image, and these virtual images are derived from the plural linear light sources.

The embodiment of the invention provides an organic light emitting display panel and an organic light emitting display device, relates to the technical field of display, and improves the problem of display unevenness caused by increasing the light emitting brightness of an organic light emitting element in a fingerprint identification area in a fingerprint identification stage. The organic light emitting display panel comprises a substrate basal plate; a display area comprises a plurality of organic light emitting elements located on one side of the substrate basal plate and having at least three different colors; the display area comprises a fingerprint identification area and a non-fingerprint identification area, and the fingerprint identification area is provided a fingerprint identification unit; the organic light emitting elements comprise a first organic light emitting element and a second organic light emitting element; the first organic light emitting element is disposed in the fingerprint identification area; the second organic light emitting element is disposed in the non-fingerprint identification area; the first organic light emitting element and the second organic light emitting element emit light of the same color; the organic light emitting elements comprise light emitting areas; and an area S1 of the light emitting area of the first organic light emitting element is larger than an area S2 of the light emitting area of the second organic light emitting element.

The invention discloses a rear naked-eye three-dimensional (3D) display and a display method. The rear naked-eye 3D display comprises an image display unit, an optical element and a backlight module, wherein the image display unit can provide a display panel of a fully-high-resolution parallax image; the optical element propagates backlight energy to different visual areas in space; and the backlight module is formed by combining a switch and small backlight units, and the brightness of each small backlight unit can be freely controlled. Light which is emitted by the backlight module passes through the optical element, penetrates through the image display unit and then is used for loading the parallax image, so different parallax images can be seen through eyes at different spatial positions, or different images can be seen at different viewpoints. Meanwhile, by controlling the specific brightness combination of the small backlight units in the backlight module, a high-resolution two-dimensional (2D) image can be played. By the invention, under the condition that 3D display is realized, adding of glasses is eliminated, the resolution of the display is prevented from being reduced, and 2D/3D bidirectional switching without resolution reduction is realized.

An aminostyryl compound represented by Formula 1:

The organic light emitting device using the aminostyryl compound exhibits low driving voltage and improved brightness, efficiency, and color purity.

The invention discloses a gray-scale brightness curve correction system and method. The method comprises the following steps that an environmental light brightness background value scattered by a displayer is acquired by utilizing a brightness measurement module through the environmental conditions so that the maximum and minimum gray-scale brightness of the displayer under environmental light is measured and standard gray-scale display output is calculated, a nonstandard DICOM curve imported to the displayer can be calculated by removing environmental light brightness, and curve output of different environmental conditions is judged and scheduled through output of an environmental light sensor. The curve meeting the standard requirements can still be measured at the observation end of the medical professional displayer under the influence of environmental light so that image distinguishing capability of doctors can be enhanced.

The invention discloses a mobile terminal. The mobile terminal comprises a battery and a battery electric quantity display system, wherein the battery electric quantity display system comprises a power supply management chip, a control chip, an LED drive chip and an LED lamp array arranged in a shell of the mobile terminal; the shell includes a transparent region arranged above the LED lamp array; the power supply management chip is used for detecting residual electric quantity of the battery; and the control chip is used for controlling the LED drive chip to drive the LED lamp array to display a figure changed based on the residual electric quantity. The invention provides the mobile terminal for indirectly reflecting a change of electric quantity of a battery by displaying a change of a figure by the LED lamp array. The change of the figure is the change of one or more of figure color, shape and brightness, so that the displaying of electric quantity of the battery is more novel and interesting.

An electronic device having a display unit, an indicator, an illuminance sensor and a controller is provided. The indicator is configured to be turned on for emitting light and to be turned off. The illuminance sensor is configured to sense ambient illuminance. The controller is connected to the display unit, the indicator and the illuminance sensor. The controller is configured to turn on and off the indicator. The controller is configured to set brightness of the display unit depending on a value of the ambient illuminance sensed by the illuminance sensor while the indicator continues to be off.

The invention relates to a backlight system containing a free-form surface reflector. The backlight system comprises light sources (1) and a backlight cavity (3), wherein the bottom of the backlight cavity (3) is a free-form surface reflecting plane (2) with high reflectivity, the backlight cavity (3) is formed by a side wall, the bottom free-form surface reflecting plane (2) and a diffusion barrier (5) arranged on the top of the backlight cavity (3), a brightness enhancement film and other optical film layers and a LCD panel are arranged on the diffusion barrier (5); the light sources (1) are arranged on the bottom of the backlight cavity (3), positioned in line and installed on the axis of the free-form surface reflecting plane (2); and a transflective optic plate (4) is arranged just above the light sources (1) in the backlight cavity (3). The backlight system of the invention has the advantages that the illuminance is uniform, the overall thickness of the system is thin, the luminous efficacy is high, and the system has the advantage of being convenient to install and cool.

The invention discloses an ad hoc network induction lamp for highway low visibility rainy and foggy weather safety induction. The ad hoc network induction lamp comprises an induction lamp shell, wherein a low power mainboard is fixed in the induction lamp shell; an intelligent ad hoc network zigbee communication module is connected with the low power mainboard through utilization of a rapid pull plug; a round red and yellow high brightness lamp panel is connected with the low power mainboard through utilization of a Dubond thread and is fixed on the induction lamp shell through utilization ofa transparent outer cover; a rain and fog high penetrability vehicle detection radar is mounted on a side face of the induction lamp shell and is connected with the rapid pull plug of the low power mainboard through utilization of the Dubond thread; a high precision time service GPS module is directly welded on the low power mainboard; a software self-management power module is fixed at a bottom of the induction lamp shell and is connected with the low power mainboard through utilization of a power wire; and a high performance monocrystalline silicon solar panel is mounted at a top of the induction lamp shell. The ad hoc network induction lamp is applicable to intelligent induction of driving under highway low visibility rainy and foggy weather condition, vehicle driving safety is ensured,and the ad hoc network induction lamp is important manifestation for establishment of an intelligent transportation system.

An imaging apparatus includes: determination means for determining whether a capture image is a frontlit image or a backlit image; detecting means for detecting a flesh-color area in the capture image; calculation means for setting weights, in a luminance histogram on the flesh-color area, on luminance of pixels included in a high-luminance area having a relatively high luminance value and luminance of pixels included in a low-luminance area having a relatively low luminance value in accordance with the determination result, and calculating modified luminance produced by modifying luminance on the flesh-color area on the basis of the weights; and correcting means for correcting brightness of the capture image on the basis of the modified luminance.

The invention discloses a background modeling method based on a brightness and texture infusion threshold value. The method comprises: a brightness and texture fusion threshold value is calculated; with a VIBE algorithm, all pixel points at one frame of image are classified into two types: foreground pixels and background pixels; Gaussian mixture modeling is carried out on pixel points with changing brightness in a new image frame; and then a threshold value corresponding to each pixel point is updated. According to the method, because the texture and color brightness are fused to form a threshold value and advantages of the Gaussian mixture model and the VIBE algorithm are combined, the background can be extracted accurately under the circumstance that several kinds of external disturbances like an illumination change, slight camera shaking, a dynamic background element exist, the influence on the real moving target by shadows can be suppressed to a certain extent, the anti-interference capability is enhanced, the image frame processing is accelerated, and the moving target segmentation precision is improved effectively.

The invention discloses a light source device, a light source producing method and a laser projector comprising the light source device. The light source device comprises a first laser source, a collimation part, a reflecting part, a first light condensation part, a dichroic part, a driving part, a second light condensation part, a wavelength converting part, a third light condensation part, a light receiving part and a reflecting steering lens group. According to the light source device, the light source producing method and the laser projector comprising the light source device, the problem that a light source generates periodic brightness variation can be effectively avoided, and the quality of projector images is greatly improved.

The invention provides an intelligent curtain control system. The system comprises a cuboid slide rail, a slider module, an auxiliary charging module, a control module, a light sensing module, a timing module and an intelligent adjustment module, wherein the upper side face of the cuboid slide rail is provided with a number scale for position recognition and judgment; the lower surface of the slider module is provided with two rows of wheels which are controlled by a motor to move forwards or backwards; the auxiliary charging module provides a charger on a single side of the cuboid slide rail; the control module enables a user to control the slider module through interface operation to control the opening size of a curtain; an ordinary light sensor is adopted in combination with an A/D converter to acquire the brightness of light outside a window and in a room; when time is up, the curtain is automatically opened or closed; the intelligent adjustment module intelligently adjusts automatic opening and closing and the opening size of the curtain. The user can control the opening degree of the curtain through a computer or a mobile phone and can set regular closing of the curtain and the sun-shading mode; the curtain is automatically closed when night comes and when sunlight is sufficient at noon, and the system is convenient to use.

According to the present invention, firstly multiple reference parameter values of each color sample in a color chart are set, or a photograph and a measurement are performed on a standard color chart or a user-defined color chart in a certain standard lighting environment, multiple reference parameter values, SPD (λ)×R (λ) and brightness of each color sample are obtained. Then the SPD (λ)×R (λ) and the brightness of each color sample are reproduced by using a spectral tunable lighting source. Then each reproduced color sample is photographed by using the camera under the same settings to obtain multiple reproduced parameter values of each color sample. The two groups of parameter values are compared and a color calibration model is established. Finally color calibration of each batch of camera modules is implemented without the helping of a color chart and standard lighting environment. The present invention has the characteristics of high automation degree, high flexibility and adaptability, and high convenience in color changing and color sample calibrating, and thus has an extremely high practical value.