274results about How to "Stable brightness" patented technology

An image display device which has a stable luminous brightness among pixels. An on/off control switch 15 for stopping the driving operation of a light emitting element 13 is provided in a pixel 1. A change in the luminous brightness caused by a variation in the characteristic of the light emitting element 13 is suppressed by feeding a result measured by a current measuring circuit provided in one end of a power line 4 back to a drive signal for the light emitting element 13.

An LED driving module suitable to drive a plurality of LED strings in parallel connection is disclosed. The LED driving module includes a voltage converting apparatus, a conduction voltage detecting apparatus, a reference voltage generating apparatus and a current-adjusting apparatus. The voltage converting apparatus produces a driving voltage according to a conduction voltage. The conduction voltage detecting apparatus detects the conducting states of the LED strings for producing a conduction voltage and an enabling signal. The reference voltage generating apparatus generates a first reference voltage according to the enabling signal. The current-adjusting apparatus produces a plurality of driving currents according to the first reference voltage, and the driving currents flow through the LED strings.

Provided is a lighting device, comprising: a light source module comprising: at least one light source disposed on a printed circuit board; and a resin layer disposed on the printed circuit board so that the light source is embedded; a light reflection member formed on at least any one of one side surface and another side surface of the resin layer; and a diffusion plate having an upper surface formed on the light source module, and a side wall which is integrally formed with the upper surface and formed to extend in a lower side direction and which is adhered onto the light reflection member, wherein a first separated space is formed between the light source module and the upper surface of the diffusion plate, whereby flexibility of the product itself can be secured, and durability and reliability of the product can be also improved.

In order to enable a display image with stable display colors and display brightness to be obtained quickly even when the optical intensity characteristic of a laser light source changes due to a harsh usage environment, a Dimmer unit is equipped with: a first light detection unit that modulates the light intensity of composite laser light emitted from a composite laser light emission unit, and detects the light intensity of the composite laser light before entering the Dimmer unit; and a second light detection unit that detects the light intensity of the composite laser light after entering the Dimmer unit. The light intensity characteristic for each color in the composite laser light emission unit is calculated on the basis of the light intensity detected by the first light detection unit, and the white balance of each color in the composite laser light emission unit is adjusted on the basis of the light intensity detected by the second light detection unit.

An active matrix type electroluminescence display device is provided which comprises a plurality of display pixels GS11, GS12, GS13, arranged in a matrix of rows and columns; gate signal lines GL1, GL2, Gli connected to and shared by a plurality of display pixels arranged in each row; and gate drive circuits for sequentially supplying a select signal SCAN to the gate signal lines GL1, GL2, GL3, Gli. Each display pixel includes an electroluminescence element, a first thin film transistor in which a display signal DATA is applied to the drain and which is switched on and off in response to the select signal SCAN, and a second thin film transistor for driving the EL element based on the display signal DATA. The gate drive circuits are placed so that each of the gate signal lines GL1, GL2, GL3, Gli is driven from both ends.

The invention relates to a method for adjusting the luminosity of a display and a related backlight module. The standard luminosity is found according to the detected temperature and actual luminosity of the backlight module and a target luminosity value used by the display. In addition, when the actual luminosity is adjusted, the influence caused by ambient light is also considered, so that the adjusted actual luminosity is not interfered by the ambient light. The method solves the problem of the luminance of the common color sequence type display is insufficient when the luminance of the light-emitting diode of the backlight module is non-linearly changed and the light-emitting diode is aged caused by the factors such as the increment of service time, the change of the temperature and the like.

The present invention provides a device and method for controlling screen brightness. The method comprises: a light sensor acquiring a brightness signal intensity value of external environment and transmitting the brightness signal intensity value to a comparator; the comparator comparing the received brightness signal intensity value with a stored brightness signal intensity value and outputting a comparison result to an integrator; if the comparison result is that the received brightness signal intensity value is greater than the stored brightness signal intensity value, the integrator increasing the stored brightness signal intensity value by a fixed value according to the comparison result; and if the comparison result is that the received brightness signal intensity value is less than the stored brightness signal intensity value, the integrator decreasing the stored brightness signal intensity value by a fixed value according to the comparison result.

The invention discloses a method and a device for facilitating user self-timing. A flash light can rotate to a frontend intelligent terminal along with the rotation of a camera; when a user performing self-timing under the dark light is detected, the flash lamp is opened and continuously illuminated to provide stable brightness for the user, and an LED (light emitting diode) lamp of a screen is opened to provide light ray compensation for the user, so the sensory stimuli of single light source is weakened, the brightness of the flash lamp is controlled, and is close to the brightness of the screen, the comfortability of the user sensing the light source is further improved, and a good self-timing environment is created.

The invention relates to an infrared image multi level mean contrast intensification method. The existing image intensifying method is not suitable for the realization of FPGA. The said infrared image multi level mean contrast intensification method comprises multi level mean computation, median filtering, linear intensification with redundant computation removed, getting value X0 and X1 through multi level mean approximation method to add the stability of the treated image, synthetically with the FPGA better than the traditional classic computation realization. Through simple contrast device, accumulator, counter, small circuit scale, less required hardware, low cost, timely feature, it can effectively adapt to the high requirement for infrared imaging equipment image intensification, for the benefit of promotion.

An LCD driving scaler capable of reducing electromagnetic interference employs a spread spectrum phase locked loop (PLL) in which a multi-phase voltage controlled oscillator oscillates and outputs a scaler pixel clock signal and a plurality of oscillation signals of different phases. A spread spectrum processor counts clock periods of a reference pixel clock signal when a horizontal synchronization signal having an adjusted frame rate is activated, and sequentially outputs the plurality of oscillation signals in response to a decoding signal. The plurality of oscillation signals are output to a main divider, which generates the main divider signal by dividing the frequencies of the plurality of oscillation signals. A main divider signal is input into a phase frequency detector, which detects a phase difference between the predivider signal and the main divider signal and outputs the phase difference signal so that the frequency of the scaler pixel clock signal repeatedly varies.

The invention provides a projection light source brightness output method. The projection light source brightness output method comprises the following steps: obtaining a ratio of a first maximum gray level value of the N frame of image to a second maximum gray level value of the N+M frame of image in real time to obtain an adjustment coefficient, performing weighting calculation on the N+M frame of image signal according to the adjustment coefficient, judging whether the number of gray level values of base colors reaching to a preset gray level value in the N+M frame of image signal after the weighting calculation is equal to a preset threshold, if so, adjusting the projection light source brightness to a set value, and if not, adjusting the projection light source brightness to 1/G of the original one. According to the projection light source brightness output method provided by the invention, the projection light source brightness can be dynamically adjusted, so that a projection light source is not always in a high-load working state, a certain energy saving effect can be realized, the service life of the light source is prolonged, and the output stability of projection images is ensured at the same time.

An illumination device and a control method of the illumination device are provided. The illumination device includes a thermal sensor and a light emitting diode (LED) module. The control method include steps of: enabling the thermal sensor to detect the environment temperature outside the illumination device, and comparing the environment temperature with a threshold value, wherein if the environment temperature is higher than the threshold value, the driven current of the LED module is reduced and the thermal sensor is shut down within a continued period of time.

An electro-luminescence display device includes an electro-luminescence panel having a plurality of pixels at pixel areas defined by intersections between data lines and first and second gate lines, each of the pixels including: an electro-luminescence cell connected to receive a supply voltage, and a first cell driver and a second cell driver for alternately controlling a current flow into the electro-luminescence cell.

A backlight device has a light guide plate, a rotary member, a rotary drive mechanism for rotating the rotary member, a plurality of mercury-free fluorescent lamps, and a power feed control mechanism. Each of the mercury-free fluorescent lamps has an arc tube mounted on the rotary member so as to extend parallel to the rotary shaft, a mercury-free discharge medium consisting of a rare gas sealed within the arc tube, and first and second electrodes for exciting the discharge medium. The mercury-free fluorescent lamps respectively emit lights of different colors. The emitted light enters the light guide plate through its light incident face and emerges from its light emission face.

Provided is a lighting device, including: a light source module comprising at least one light source on a printed circuit board, and a resin layer in which the light source is embedded; a light reflection member which is adjacent to at least any one of one side surface and the other side surface of the resin layer; and an optical plate comprising a side wall which is closely adhered to the light reflection member, and an upper surface which covers an upper part of the light source module, wherein a haze of the optical plate is less than 30%.

An optical collector for an automotive dipped headlight module comprises an optical collecting structure (1), a cut-off line forming structure (2), a 50L dark region forming structure (3), an III region forming structure (4) and an SEG 10 brightness reducing structure (5). The III region forming structure (4) comprises an III region broadening forming structure (4-1) and an HV brightness reducing structure (4-2); and the cut-off line forming structure (2) is arranged at the front end of the optical collector, the SEG 10 brightness reducing structure (5) is arranged on the bottom of the optical collector, the III region forming structure (4) is arranged on the bottom of the optical collector and is positioned at the front end of the SEG 10 brightness reducing structure (5), and the 50 L dark region forming structure (3) is arranged on the bottom of the optical collector, and is positioned between the III region forming structure (4) and the cut-off line forming structure (2). According to the optical collector for the automotive dipped headlight module, except a lens, all other optical elements and parts of the optical collector are integrated, and therefore, space utilization efficiency is greatly improved; positional accuracy of various optical functional components is guaranteed, and position errors do not exist; and costs are low.

The present disclosure provides an array substrate for an organic light-emitting diode (OLED) display panel. The array substrate includes a substrate, a thin film transistor (TFT) layer comprising a plurality of TFTs, and an anode layer comprising a plurality of anode electrodes. The array substrate also includes an organic layer comprising a plurality of organic units corresponding to anode electrodes, and a cathode layer comprising a plurality of touch electrodes for a time-sharing operation. Each touch electrode corresponds to a portion of the plurality of organic units, the plurality of the touch electrodes being arranged to be applied with a normal cathode voltage in a displaying period and to be applied with a touch cathode voltage in a touch-sensing period.

The invention relates to an intelligent dimming toning method and a device for a multi-color LED illumination light source and relates to an LED illumination light source. The intelligent multi-color LED illumination light source is provided with a power source module, a driving control module and an LED illumination module, wherein the power source module is provided with an AC-DC unit and a DC-DC unit, the power source module is connected with a power source port of the driving control module, the driving control module is provided with a wideband antenna, a multi-mode radio frequency processing unit, a data storage unit, a single-chip microcomputer, a constant current driving unit, a power source port, a feedback port and a driving bus port, and the LED illumination module is provided with a distributed temperature sensor, a red light LED, a green light LED, a blue light LED and a white light LED. According to the intelligent multi-color LED illumination light source, compatibility of and support for the multi-mode wireless networking technology can be realized; on the basis of the white light LED, through collocation of the red, green and blue light LEDs, the color temperature of the mixed-color light is adjustable, high color rendering is realized, and no-lower-than-95 high color rendering indexes can be realized.

The invention relates to a shooting system and a shooting method. A light-emitting device driven by an alternating driving signal is arranged close to the shooting system. The shooting system comprises a video frame driving signal generating unit and an image acquiring and generating unit, wherein the video frame driving signal generating unit is used for generating a video frame driving signal at the interval of N periods of a synchronization signal of a practical driving signal of the light-emitting device; N is an integer which is more than or equal to 1; the light-emitting device is arranged close to the shooting system; and the image acquiring and generating unit is used for acquiring video frames according to video frame driving signals so as to generating a video. In the shooting system and the shooting method, shooting is performed according to the frequency of the driving signal of the light-emitting device, so that a shot video is clear and the video brightness is stable.