52results about How to "Reduce backlight power consumption" patented technology

A liquid crystal display apparatus includes a liquid crystal display panel having a liquid crystal layer held between a pair of substrates; and a light source, a whose brightness of which is controllable, wherein the liquid crystal display apparatus further includes a unit for generating an image signal with a signal for controlling the liquid crystal layer configured in a display area of a frame-based pixel configuration and with a signal for controlling the light source configured in a blanking interval of the frame-based pixel configuration.

An image display apparatus includes a dimming value determination circuit for determining a dimming value of a backlight based on an input image signal, an image signal compensation circuit for compensating the input image signal supplied to a liquid crystal panel in accordance with the dimming value, and a backlight drive circuit for driving and controlling the backlight in accordance with the dimming value. When the light emitting luminance of the present frame of the backlight increases relative to the light emitting luminance of the previous frame, the backlight drive circuit delays the timing for applying the dimming value of the present frame. This makes it possible to reduce power consumption of the backlight by suppressing deterioration in the image quality in spite of the sharp change in the display image luminance.

The invention discloses a backlight automatic adjusting method and device for an electronic device. The method comprises the steps of obtaining a backlight luminance reference value by obtaining the luminance of the current environment; calculating an average luminance value and the contrast ratio of an image according to the gray level of pixel points in the image currently displayed by the device, and obtaining a first backlight luminance adjusting valve and a second backlight luminance adjusting valve of the image; obtaining the backlight luminance of the image according to the backlight luminance reference value, the first backlight luminance adjusting valve and the second backlight luminance adjusting valve; obtaining the target backlight luminance of the image according to the backlight luminance and target backlight luminance obtained through calculation last time; adjusting backlight of the image according to the target backlight luminance. Thus, the problems in the prior art that the backlight power consumption of a display screen cannot be reduced to the largest extent and the duration of the electronic device cannot be prolonged to the largest extent can be solved, the plash screen phenomenon is avoided, the calculation amount is further reduced, and the DDR and CPU consumption is reduced.

Provided is a side-in-type LED backlight source liquid crystal display dynamic dimming method and device. A face plate is divided into m*n rectangular logic zones; then each rectangular logic zone is affiliated to an LED backlight lamp set which has the largest diffusion ratio on the rectangular logic zone; input image data are stored in a storage, and meanwhile target backlight of each rectangular logic zone is computed through input images; the brightness of each LED backlight lamp sets is determined through the four dimming steps. According to the method and the device, the four steps of a dimming algorithm are used, backlight power loss can be effectively lowered, and meanwhile image quality is enhanced, the brightness of each LED backlight lamp set is obtained, the four dimming steps are easy to achieve, for different side-in-type backlight types, an algorithm can be achieved flexibly by dividing the logic zones, and universality is strong.

The invention discloses a backlight control method for liquid crystal display devices. The method comprises the following steps: a brightness control unit receives an image signal, increases the gray-scale brightness of the image signal according to a first proportion, generates a corresponding driving voltage through control, and inputs the driving voltage to a backlight module to reduce the backlight brightness according to the first proportion; and the brightness control unit further receives a frame control time sequence signal and / or line control time sequence signal, and the brightness control unit stops outputting the driving voltage to the backlight module within a first blanking time and / or a second blanking time, wherein the first blanking time refers to the interval time between the end of a nth frame of image signals and the start of a (n+1)th frame of image signals, the second blanking time refers to the interval time between the end of a mth line of signals and the start of a (m+1)th line of signals, and m and n are integers greater than 1. The invention further discloses a liquid crystal display device adopting the backlight control method.

The invention discloses a method and a circuit for driving a backlight light emitting diode (LED) lamp of a television, and the television. The method comprises the following steps of: performing corresponding phase shift time delay processing on a field synchronous signal of the television according to turning time of liquid crystal molecules of a television display screen; performing frequency doubling processing on the field synchronous signal subjected to phase shift time delay, and thus obtaining a first clock control signal of which the frequency is N times the frequency of the field synchronous signal, wherein N is a positive integer and more than or equal to 2; and dividing the first clock control signal into N independent second clock control signals, wherein when the rising edge or the falling edge of the field synchronous signal arrives, the second clock control signals sequentially control N backlight LED lamp strips which are arranged above and below the television to be switched on according to a corresponding time interval. According to the method and the circuit, the problem of cross interference of right and left eyes when the television is in a three-dimensional (3D) state can be solved; furthermore, the display brightness of the television can be improved, and the backlight power consumption of the television is reduced; and aims of saving energy and saving power are fulfilled.

The invention provides a backlight circuit, and a method and a terminal for controlling the voltage of the backlight circuit. The backlight circuit comprises a luminescent device module, a current control circuit module, a switch power module and a processor, wherein the luminescent device module is serially connected with the current control circuit module; the switch power module provides voltage for the luminescent device module; the processor is used for controlling the output voltage of the switch power module in a backlight starting process, and enables the voltage of the current control circuit module to be equal to or slightly greater than the pre-stored corresponding reference voltage of the current control circuit module under the corresponding brightness level. The using voltage can be automatically controlled according to the backlight brightness level, backlight power consumption can be reduced to the maximum degree on the premise that the user experience is unaffected, so that the purpose of saving energy is achieved, and the endurance ability of the terminal is improved.

The invention relates to a backlight drive circuit, and the drive circuit comprises a voltage supply part which is configured to supply a first drive voltage; and a voltage regulating part which is configured to output a first drive voltage to a light-emitting element when the environment temperature of the light-emitting element is lower than a preset threshold value, and to output a second drive voltage less than the first drive voltage to the light-emitting element when the environment temperature of the light-emitting element is higher than the preset threshold value.

The invention discloses a backlight module and a display device. The backlight module comprises a light emitting part, a photo-induced light emitting part and a polarization state adjusting part; the light emitting part is used for providing backlight and comprises multiple first subregions, and the light emitting brightness of all the first subregions is different; the photo-induced light emitting part is used for emitting multiple monochromatic lights of which the polarization directions are perpendicular to one another, and the monochromatic lights are compounded into white light to be emitted into the polarization state adjusting part; the polarization state adjusting part is used for adjusting the polarization directions of the monochromatic lights in the white light. According to the backlight module, by means of the combined action of the light emitting part, the photo-induced light emitting part and the polarization state adjusting part, dynamic control over backlight spectra can be achieved, the product color gamut can be widened, and backlight power dissipation can be reduced.

The invention discloses a fully transparent liquid crystal display module which comprises a backlight unit and a fully transparent liquid crystal display arranged above the backlight unit, wherein the fully transparent liquid crystal display also comprises at least an external light source acquisition unit; the external light source acquisition unit is used for acquiring external light rays to the backlight unit. Through adding the external light source acquisition unit on the fully transparent liquid crystal display module, the light source of the fully transparent liquid crystal display module is not only provided by the prior backlight unit, but also provided by the external light source acquisition unit; the luminance of the fully transparent liquid crystal display module can be changed along with the change of the external light source; the fully transparent liquid crystal display module also can realize normal display under the outdoor strong light and has high contrast ratio and good display effect; and the light source of the liquid crystal display module can be better supplied and strengthened, so that the backlight power consumption of the prior backlight unit is saved, thereby achieving the higher luminance. Meanwhile, the fully transparent liquid crystal display module also keeps the characteristics of high opening ratio and high color saturation of the prior fully transparent liquid crystal display module.

The invention belongs to the technical field of light emitting diodes (LED), and discloses a backlight LED driving chip and a time division (TD) terminal. The backlight LED driving chip comprises a charge pump, wherein voltage doubling modes of the charge pump comprise the voltage doubling mode of less than 1.5X. A common anode of the 1.33X voltage doubling mode is adopted to output a plurality of paths of constant current sources so as to adjust the charge pump for backlight driving of a liquid crystal display (LCD) parallel white light; the backlight power consumption of the LCD parallel white light is reduced to be over 40mA; and thus the backlight power consumption is greatly reduced, and the utilization ratio of the power source is also improved.

The invention provides a liquid crystal display panel and a display device. The liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are opposite to each other, the liquid crystal layer is arranged between the first substrate and the second substrate, a first electrode layer is arranged on theside, facing the liquid crystal layer, of the first substrate, a second electrode layer is arranged on the side, facing the liquid crystal layer, of the second substrate, and the first electrode layerand the second electrode layer are in axial symmetry about the liquid crystal layer. According to the liquid crystal display panel and the display device, through the arrangement of the first electrode layer on the first substrate and the arrangement of the second electrode layer on the second substrate, field stress of the liquid crystal layer in the vertical direction can be offset. Therefore,the penetration rate of the liquid crystal display panel can be increased while the backlight power dissipation is lowered, and thus the screen luminance is improved.

The invention provides a method for improving pure color image brightness. The method comprises the following steps that a gray scale of a pure color image of an ordinary color gamut displayed by RGB pixels in a quantum dot color gamut is determined according to a Grassmann color law; an R0G0B0 pixel gray scale which is subjected to quantum dot backlight display and replaces the ordinary backlight display pure color image is converted into an R1G1B1W pixel gray scale; environmental comparison is conducted according to an environmental brightness value and a brightness critical value, and whether the brightness value is larger than the brightness critical value or not is judged; when the environmental brightness value is larger than the brightness critical value, a W sub-pixel gray scale is improved by the ratio of a sub-pixel 255 gray scale of the pure color image replaced by the R0G0B0 pixels and a gray scale of the sub-pixels which have the highest gray scale in R sub-pixels, G sub-pixels, B sub-pixels and W sub-pixels, sub-pixel gray scales of other nonzero gray scales are improved equidistantly; a liquid crystal display device is made to improve the brightness of the pure color image according to the adjusted R1G1B1W pixel gray scale.

The invention discloses a mobile terminal. The mobile terminal comprises a first display screen and a second display screen, wherein the first display screen has a first display surface, the second display screen has a second display surface, the first display screen and the second display screen are opposite in direction, at least one of the first display screen and the second display screen is a reflective liquid crystal display screen, and when one of the display screens is in an image display state, the other is in a closed state. Accordingly, the power consumption of the mobile terminal can be reduced to a certain extent, and the endurance capacity of the mobile terminal can be improved.

The invention provides a laser backlight module. The laser backlight module comprises an LED (Light Emitting Diode) lamp strip and a laser lamp strip on one side of the LED lamp strip, wherein the laser sources of the laser lamp strip are green light laser diodes; each LED lamp of the LED lamp strip comprises a base, a heat sink installed in the base, a blue light lamp wick fixed in the heat sink and a lamp shell, the base is fully filled with gel containing fluoride red light fluorescent powder, the gel covers the blue light lamp wick, the lamp shell covers the base and holds the gel, and the light sources of the laser lamp strip and the LED lamp strip are simultaneously lighted up as a backlight. The invention further provides a backlight module and a display device.

The invention provides a thin film transistor used in a display panel and the display panel. The thin film transistor comprises a gate and a gate insulation layer, wherein the gate is arranged on a glass substrate in the display panel, the gate insulation layer covers the gate, the gate is arranged on a non-display region of the display panel, an active layer is arranged on the gate insulation layer and is arranged above the gate, the active layer is further provided with a source and a drain, and the gate sequentially comprises a first non-metal layer and a metal layer in a direction far awayfrom the glass substrate. By the thin film transistor, the influence of reflective light can be improved on the premise of no increase on cost of the display panel, the reflectivity is reduced, and the display quality is improved.

The invention provides a Mini-LED backlight partition control system. The Mini-LED backlight partition control system comprises a video signal input module, a data processing and control module, a panel driving display module, a backlight driving module and a backlight display module. According to the method, a deep learning model among the contrast ratio, the power consumption, the system complexity and the backlight partition number is established, and the optimal backlight partition is determined. According to the system, partition images are processed, and a partition dimming algorithm for backlight brightness matrix compensation is combined, so backlight driving signals of partitions are adjusted, and area backlight brightness control matched with image information is realized. The invention has the beneficial effects that a quantitative model of the backlight partition number, the contrast ratio and the power consumption is established, the optimal partition is determined by comprehensively considering the complexity of a partition implementation scheme, and the dimming method of the backlight fuzzy model is adopted, so the real distribution condition of backlight can be reflected more accurately, the dimming accuracy of the Mini-LED area is greatly improved, and the power consumption and the contrast ratio are optimized.

The invention relates to a display panel and a manufacturing method thereof, and a display device. The display panel comprises a plurality of scanning lines arranged in a row direction, a plurality ofdata lines arranged in a column direction and a plurality of pixel units which are defined by the scanning lines and the data lines and arranged in rows and columns. Two rows of pixel units are arranged between every two adjacent scanning lines, and each scanning line is electrically connected with the two adjacent rows of pixel units located on the two sides of the scanning line. In this way, one scanning line provides scanning signals for the two adjacent rows of pixel units located on the two sides of the scanning line at the same time, the number of the scanning lines can be reduced, thenan aperture opening ratio of the pixel units in the array substrate can be increased, and backlight power consumption is reduced.

The invention provides a pixel unit and a liquid crystal display device and belongs to the field of liquid crystal display. The pixel unit comprises multiple pixels, multiple grid lines and multiple data lines, wherein the multiple pixels are arrayed in a matrix mode, each pixel comprises a red sub pixel, a green sub pixel, a blue sub pixel, a white sub pixel and a yellow sub pixel; the multiple grid lines are used for receiving scanning signals according to a time sequence, and each grid line is connected with five rows of sub pixels; the data lines are used for receiving data signals, every 5 data lines are connected with 1 column of sub pixels, the first data line is connected with the 5k plus 1 sub pixel of the column of sub pixels, the second data line is connected with the 5k plus 2 sub pixel of the column of sub pixels, the third data line is connected with the 5k plus 3 sub pixel of the column of sub pixels, the fourth data line is connected with the 5k plus 4 sub pixel of the column of sub pixels, the fifth data line is connected with the 5k plus 5 sub pixel of the column of sub pixels, k equals to 0,1,2 ellipsis, K minus 1, and K is one fifth of the total rows of sub pixels. According to the invention, the image quality is effectively improved.

The invention discloses a backlight compensation method and device for a liquid crystal display image, a storage medium and a terminal. The backlight compensation method comprises the steps that calculating a brightness component histogram of an image in an HSV color space; determining the brightness and contrast type of the image according to the pixel distribution proportion of the brightness component histogram; estimating a backlight value of the image according to the determined image brightness and contrast type; and performing backlight compensation on a low-frequency part image and a high-frequency part image based on the backlight value, and the low-frequency part image and the high-frequency part image being obtained by performing frequency division processing on the images. Through the technical scheme provided by the embodiment of the invention, the backlight power consumption of the liquid crystal display image can be saved, and local details of the liquid crystal displayimage can be stored as much as possible.

The invention relates to a mobile phone backlight control method which comprising the steps of triggering a sensor or a camera on a mobile phone to detect current environment luminance brightness according to an incoming call event or a key action event; adjusting a luminance value of a screen of the mobile phone according to the environment luminance brightness, wherein the higher the environment luminance brightness is, the higher the luminance value of the screen of the mobile phone is; and adjusting a display image of the screen of the mobile phone according to the environment luminance brightness, wherein the high the environment luminance brightness is, the higher an adjusting value is, and the adjusting value comprises a contrast adding value to low brightness pixel and a contrast lowering value to high brightness pixel. According to the mobile phone backlight control method, ambient light induction and image gray scale processing are merged together, ambient light, the displayscreen, backlight of the display screen and backlight of a keyboard are designed into a system, and the dynamic control of the system is conducted by a multipath and efficient adjusting method, so that the power consumption of the backlight is reduced to the largest extent on the premise of not influencing display effect and improving the experience of a user.

The invention relates to a rapid area backlight adjusting method for an interlaced scanning video. For each image of an interlaced scanning video sequence, a deinterlacing algorithm is utilized to carry out interpolation to acquire a reconstruction image; if an original image of the reconstruction image is an odd field image, the reconstruction image is divided into blocks; sparsity processing on each block is carried out to acquire a pixel data set containing the information amount greater than a set value of the block; gray processing on the acquired pixel data set is carried out; for the data set after gray processing, a subinterval maximum between-class variance method is utilized to acquire a backlight value of each block; smooth operation for the backlight value of each block is carried out to acquire a backlight value after smooth processing; the backlight value is utilized to carry out area backlight adjustment, and liquid crystal compensation is further carried out; if the original image of the reconstruction image is an even field image, the reconstruction image acquired on the basis of an odd field is directly utilized, the backlight value after backlight smooth processing is acquired, and liquid crystal compensation is further carried out. The method is advantaged in that backlight energy consumption is greatly reduced, and video quality is guaranteed.

The invention discloses a control method of a driving circuit, the driving circuit and a light-emitting substrate. The driving circuit is used for a light-emitting substrate, and the control method comprises the following steps: obtaining a wiring voltage drop voltage, a lamp string voltage, a lamp string voltage difference and a channel voltage of the light-emitting substrate, calculating to obtain a target power supply voltage, comparing the target power supply voltage with a power supply output voltage, and generating an adjustment signal according to a comparison result of the power supply output voltage and the target power supply voltage, and adjusting the power supply output voltage according to the adjusting signal so as to match the power supply output voltage with the target power supply voltage. According to the control method, the power supply voltage required by the light-emitting substrate is obtained by obtaining the routing voltage drop voltage, the lamp string voltage, the lamp string voltage difference and the channel voltage, so that the power supply output voltage can be adjusted to be matched with the power supply voltage. Therefore, reactive power loss can be prevented from being increased, and the purpose of reducing backlight power consumption is achieved.

The invention provides an RGB Mini-LED field order backlight control system. The backlight control system comprises a video signal input module, a storage module, a data processing and control module, a panel driving display module, a backlight driving module and a backlight display module. According to the method, a deep learning model between the contrast ratio, the power consumption, the color splitting index and the system complexity and the number of the color RGB Mini-LED lamp bead backlight partitions is established, and the optimal backlight partition is obtained. According to the backlight control system disclosed by the invention, the field sequence partition image is processed, and a backlight control algorithm of adaptive partition primary color adjustment is adopted, so backlight driving signals are dynamically adjusted field by field and partition by partition, and color and brightness control of area backlight matched with field sequence display image information is realized.

The utility model discloses a display panel and a display device, the display panel is provided with a main display area and a virtual key area located at the edge of the main display area, the display panel comprises a first liquid crystal box and a second liquid crystal box, the projection of the first liquid crystal box on the display panel at least covers the virtual key area, and the projection of the second liquid crystal box on the display panel at least covers the virtual key area. The projection of the second liquid crystal box on the display panel coincides with the main display area. The first liquid crystal box comprises an opposed substrate, a first array substrate and a cholesteric liquid crystal layer located between the opposed substrate and the first array substrate, a first pixel electrode is arranged on the first array substrate, and a first common electrode is arranged on the opposed substrate; the first pixel electrode and the first common electrode are used for controlling the cholesteric liquid crystal layer to be switched between a reflection state and a scattering state; the second liquid crystal box is used for controlling gray scale display of pictures in the main display area. The first liquid crystal box adopting the cholesteric liquid crystal is arranged in the virtual key area, so that the key icons can be displayed by utilizing ambient light, and the backlight power consumption of the virtual key area is reduced.

The invention discloses a method used for reducing the power consumption of a display panel. The method includes the following steps: measuring a distance between the eyes of a user and a display panel through an infrared sensing unit, and measuring ambient brightness through an ambient light sensing unit; transmitting the measured distance to a processing control unit through the infrared sensingunit, and transmitting the measured ambient brightness to the processing control unit through the ambient light sensing unit; and adjusting the resolution of the display panel through the processingcontrol unit according to the measured distance and the measured ambient brightness.

The invention discloses a mobile terminal and a power saving reminding method for reminding events of the mobile terminal. The power saving reminding method comprises the steps that the state recognition user scenario where the mobile terminal is located at present is detected when the reminding events exist, the lighting state of a backlight is controlled according to the user scenario, and a user is reminded of the reminding events according to the preset reminding method. Only when the recognition user scenario needs the backlight to be turned on, the backlight is turned on to remind the user. When the recognition user scenario does not need the backlight to be turned on, the backlight is turned on, the user is reminded of the reminding events only through the preset tinkle of bells or vibration, and accordingly the backlight power consumption of the reminding events is saved, and the stand-by time of a battery is prolonged.

A liquid crystal display panel, and a driving device and a method thereof. The method comprises: when a signal type of a received driving signal is not an RGBWY driving signal, decomposing the driving signal (501); outputting the decomposed driving signal according to a pixel array structure of the liquid crystal display panel (502); and when the signal type of the received driving signal is the RGBWY driving signal, directly outputting the driving signal according to the pixel array structure of the liquid crystal display panel (503). The liquid crystal display panel increases backlight utilization by adding white sub-pixels, improves color expression ability by adding yellow sub-pixels, and increases mix-color effects by using a pixel array of a pentile matrix structure.

The present invention relates to a backlight driving circuit, which includes: a voltage supply part configured to supply a first driving voltage; outputting the first driving voltage to the light emitting element, and outputting a second driving voltage lower than the first driving voltage to the light emitting element when the ambient temperature of the light emitting element is higher than the preset threshold.