CN114822423A - Liquid crystal display television and backlight adjusting method thereof - Google Patents
Liquid crystal display television and backlight adjusting method thereof Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
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- G—PHYSICS
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- G09G2320/00—Control of display operating conditions
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- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- Physics & Mathematics (AREA)
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a liquid crystal television, which comprises: the backlight module is arranged in the plastic rear shell and is fixedly connected with the liquid crystal screen through a plurality of bolts II. The first bolt is arranged, so that the liquid crystal display and the plastic rear shell can be mounted and dismounted conveniently, and when the liquid crystal display is damaged, maintenance personnel can replace and maintain the liquid crystal display conveniently; through setting up bolt two, be favorable to right backlight unit installs the dismantlement, unusual convenient and practical can come to carry out intelligent regulation to the display backlight of LCD screen according to the situation of change of ambient brightness fast through setting up backlight unit for the display backlight after the regulation is more reliable and practical, has avoided the user to adjust in a poor light and has caused the emergence of the impaired condition of vision, has improved stability subjective.
Description
Technical Field
The invention relates to the technical field of televisions, in particular to a liquid crystal television and a backlight adjusting method thereof.
Background
The television is one of the most commonly used audio-visual devices at present, and the visual effect is one of the important factors influencing the audio-visual experience of the user, wherein the optimal backlight effect can bring the most striking experience to the visual experience of the user. According to the visual characteristics of human eyes, the intensity of the ambient light directly influences the effect of watching television images by human eyes. Generally, when the ambient light is too bright and the backlight of the television is too dark, the image cannot be seen clearly by human eyes, which affects the viewing experience; on the contrary, when the ambient light is too dark and the backlight of the television is too bright, human eyes can feel dazzling obviously, and the situation has great harm to the health of the human eyes. Most of the existing liquid crystal display televisions adjust the backlight of the television through a remote controller, the effect of adjusting the backlight in the mode is usually determined by subjective judgment of users, and for users without professional optical theory basis, the backlight effect adjusted by the backlight adjusting mode is often not scientific, healthy and reasonable, so that the backlight effect causes certain damage to eyes of watching users.
Disclosure of Invention
Aiming at the displayed problems, the invention provides a liquid crystal display television and a backlight adjusting method thereof, which are used for solving the problems that the backlight adjusting effect in the prior art is often determined by subjective judgment of a user, and for the user without professional optical theory basis, the backlight adjusting effect adjusted by using the backlight adjusting method is often not scientific, healthy and reasonable, so that the user can damage the eyes of the watching user to a certain extent.
A liquid crystal television, the apparatus comprising:
the backlight module is arranged in the plastic rear shell and is fixedly connected with the liquid crystal screen through a plurality of bolts II;
the backlight module comprises:
the high-definition camera is used for collecting a face image set of a viewer of the liquid crystal television;
the brightness detector is used for detecting the ambient brightness of the space where the liquid crystal television is located;
the processor is simultaneously connected with the high-definition camera and the brightness detector and used for judging the fatigue state of the human face image set according to the human face image set and selecting an adaptive target backlight value according to the fatigue state and the environment brightness;
and the first controller is connected with the processor and is used for controlling the backlight adjusting component to adjust the current backlight value of the liquid crystal television to the target backlight value.
Preferably, the side all around of plastics backshell is provided with a plurality of thermovent, orientation in the plastics backshell the thermovent is provided with a plurality of heat dissipation module, every heat dissipation module includes:
the first heat dissipation unit comprises a heat absorption plate close to a heat source part of the liquid crystal screen and a heat dissipation piece assembly close to a heat dissipation opening, the heat absorption plate is connected with the heat dissipation piece assembly through a heat pipe, the heat dissipation piece assembly dissipates heat absorbed by the heat absorption plate and transferred through the heat pipe, and a plurality of heat dissipation fins arranged in parallel are arranged on the heat dissipation piece assembly;
the second heat dissipation unit comprises a heat dissipation fan blade close to the heat dissipation port, a driving motor for driving the heat dissipation fan blade to rotate for heat dissipation and a transmission piece for connecting the heat dissipation fan blade and the driving motor;
the temperature detection module comprises a plurality of temperature sensors, is arranged on the back of the liquid crystal screen at intervals and is used for detecting the temperature value of heat emitted by the liquid crystal screen;
the temperature analysis module is used for receiving each temperature value data detected by the temperature detection module, calculating a temperature average value and a temperature standard deviation of each temperature value data, and sending an alarm signal when the temperature average value is higher than a preset temperature threshold value and/or the temperature standard deviation is larger than the preset temperature standard deviation;
and the second controller is used for receiving the alarm signal sent by the temperature analysis module and controlling the driving motor to start and drive the heat dissipation fan blade to perform heat dissipation treatment.
Preferably, the heat absorbing plate is tightly connected with a heat source part on the back of the liquid crystal screen (1) through a rubber pad, and the heat source part comprises a plurality of circuit boards and/or display screens;
the heat pipe comprises a pipeline body and a heat absorption core body sleeved and fixed on the inner wall of the pipeline body, and working media are arranged in the heat absorption core body.
A backlight adjustment method, comprising the steps of:
collecting a face image set of a viewer and preprocessing the face image set;
determining the fatigue state of a viewer according to the preprocessed face image set, and determining a first recommended backlight value according to the fatigue state;
detecting the ambient brightness of a target space where the liquid crystal television is located, and determining a second recommended backlight value of the liquid crystal television based on the ambient brightness;
and comprehensively determining an adjusting backlight value of the liquid crystal television according to the first recommended backlight value and the second recommended backlight value, and adjusting the backlight of the liquid crystal television.
Preferably, before the acquiring and preprocessing the set of face images of the viewer, the method further comprises:
acquiring a visual coverage area of the display content of the liquid crystal display television in a target space;
setting a television viewer judgment condition according to the visual coverage area;
extracting sitting posture characteristic indexes and visual characteristic indexes of the watching testers in the coverage area;
establishing a watching evaluation model of the liquid crystal television according to the judging condition of the television watching personnel and the sitting posture characteristic index and the visual characteristic index of the watching testing personnel;
and screening out target persons meeting the viewing requirements from the active persons in the visual coverage area by using the viewing evaluation model.
Preferably, the acquiring and preprocessing a set of face images of a viewer includes:
detecting a target distance between a viewer and the liquid crystal television;
setting exposure time and shooting pixels according to the target distance;
acquiring a face image of a viewer by setting parameters, detecting a fuzzy scale of the face image, confirming whether the fuzzy scale is smaller than or equal to a preset scale, if so, confirming that the face image is qualified, otherwise, confirming that the face image is unqualified, and readjusting the setting parameters to acquire the face image until the acquired face image is qualified;
combining the collected periodic face images of the viewers to obtain a face image set of the viewers;
and carrying out preprocessing work of drying removal and pixel optimization on the face image set.
Preferably, the determining a fatigue state of the viewer according to the preprocessed face image set, and determining a first recommended backlight value according to the fatigue state, includes:
extracting a human face feature set and a human eye feature set of the viewer according to the preprocessed human face image set;
determining the mental fatigue state of the viewer according to the human face feature set, and determining the visual fatigue state of the viewer according to the human eye feature set;
determining eye fatigue coefficients and mental fatigue coefficients of the viewers according to the mental fatigue states and the visual fatigue states;
and determining a first recommended backlight value suitable for the viewer according to the eye fatigue coefficient and the mental fatigue coefficient.
Preferably, the detecting the ambient brightness of the target space where the liquid crystal television is located, and determining the second recommended backlight value of the liquid crystal television based on the ambient brightness includes:
determining a light intensity value corresponding to the ambient brightness;
calculating the influence coefficient of the ambient brightness on the backlight value of the liquid crystal display television according to the light intensity value;
acquiring a backlight partition of the liquid crystal display television, and determining a current backlight value and a backlight coefficient of the liquid crystal display television according to the backlight partition;
and calculating a second recommended backlight value of the liquid crystal television according to the current backlight value, the backlight coefficient and the influence coefficient of the ambient brightness on the backlight value of the liquid crystal television.
Preferably, the adjusting backlight value of the lcd tv is determined comprehensively according to the first recommended backlight value and the second recommended backlight value, and the backlight adjustment of the lcd tv includes:
respectively determining backlight levels corresponding to the first recommended backlight value and the second recommended backlight value;
respectively calculating respective backlight diffusion distribution values of the first recommended backlight value and the second recommended backlight value according to the first recommended backlight value and the second recommended backlight value and the backlight levels corresponding to the first recommended backlight value and the second recommended backlight value by using a preset backlight diffusion function;
constructing a dimming matrix of a backlight adjusting component of the liquid crystal television according to the backlight diffusion distribution values corresponding to the first recommended backlight value and the second recommended backlight value respectively;
acquiring a matrix factor which repeatedly appears in the dimming matrix;
constructing a backlight matrix according to the repeated matrix factors;
acquiring a target backlight value corresponding to the backlight matrix from a preset database as an adjusting backlight value of the liquid crystal television;
calculating the backlight adjusting value of each partition according to the backlight coefficient of each partition in the backlight partition of the liquid crystal display television and the adjusting backlight value;
and generating an independent backlight adjusting signal of each subarea according to the backlight adjusting value of each subarea to adjust the backlight of the liquid crystal television.
Preferably, the constructing a dimming matrix of a backlight adjusting component of the lcd tv according to the backlight diffusion distribution values corresponding to the first recommended backlight value and the second recommended backlight value includes:
acquiring backlight diffusion distribution values corresponding to the first recommended backlight value and the second recommended backlight value respectively, and confirming the backlight diffusion distribution values as a first backlight diffusion distribution value and a second backlight diffusion distribution value;
establishing a first original matrix based on the first backlight diffusion distribution value, and simultaneously establishing a second original matrix based on the second backlight diffusion distribution value;
respectively acquiring the number of rows and the number of columns corresponding to each original matrix, and simultaneously respectively acquiring a first rank corresponding to the first original matrix and a second rank corresponding to the second original matrix;
acquiring a first row difference between the first rank and the row number corresponding to the first original matrix and a first column difference between the first rank and the column number corresponding to the first original matrix;
respectively judging whether the first row difference and the first column difference are within a first preset range, and inputting the judgment result into a preset logic AND gate to obtain a logic result;
if the logic result is 0, determining that the first original matrix belongs to a first low-rank matrix;
meanwhile, acquiring a second row difference between the second rank and the corresponding row number and a second column difference between the second rank and the corresponding column number;
respectively judging whether the second row difference and the second column difference are within a second preset range, and inputting the judgment result into a preset logic AND gate to obtain a logic result;
if the logic result is 0, determining that the second original matrix belongs to a second low-rank matrix;
performing adaptive training on each low-rank matrix by using an initial convolution kernel to obtain a corresponding first convolution kernel and a corresponding second convolution kernel;
obtaining a first size, denoted as n, of the first convolution kernel 1 *n 1 Obtaining a second size, denoted as n, of the second convolution kernel 2 *n 2 ；
Generating a corresponding first decomposition factor n based on the first size and the second size 1 1, a second decomposition factor n 2 *1；
Sequentially decomposing each element in the first low-rank matrix by using the first decomposition factor, eliminating redundancy of the first low-rank matrix, and generating a first backlight matrix;
sequentially decomposing each element in the second low-rank matrix by using the second decomposition factor, eliminating redundancy of the second low-rank matrix, and generating a second backlight matrix;
and performing mutual adaptation training on the parity elements of the first backlight matrix and the second backlight matrix to construct a dimming matrix of a backlight adjusting component of the liquid crystal television.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings, the correspondence of components and reference numerals is as follows:
1. a liquid crystal screen; 2. a plastic rear shell; 3, first bolts; 4. a heat dissipation port; 5. a backlight module; 6. a second bolt;
fig. 1 is a schematic structural diagram of an lcd tv provided in the present invention;
fig. 2 is a schematic structural diagram of a backlight module in an lcd tv provided in the present invention;
fig. 3 is a schematic structural diagram of a heat dissipation module in an lcd tv provided in the present invention;
FIG. 4 is a flowchart illustrating a backlight adjusting method according to the present invention;
FIG. 5 is another flowchart of a backlight adjusting method according to the present invention;
fig. 6 is a flowchart of another operation of a backlight adjusting method according to the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The television is one of the most commonly used audio-visual devices at present, and the visual effect is one of the important factors influencing the audio-visual experience of the user, wherein the optimal backlight effect can bring the most striking experience to the visual experience of the user. According to the visual characteristics of human eyes, the intensity of the ambient light directly influences the effect of watching television images by human eyes. Generally, when the ambient light is too bright and the backlight of the television is too dark, the image cannot be seen clearly by human eyes, which affects the viewing experience; on the contrary, when the ambient light is too dark and the backlight of the television is too bright, human eyes can feel dazzling obviously, and the situation has great harm to the health of the human eyes. Most of the existing liquid crystal televisions adjust the backlight of the television through a remote controller, the effect of adjusting the backlight in the mode is usually determined by subjective judgment of users, and for users without professional optical theory basis, the backlight effect adjusted by the backlight adjusting mode is often not scientific, healthy and reasonable, so that the backlight effect causes certain damage to eyes of watching users.
A liquid crystal television, as shown in fig. 1, the apparatus comprising:
the liquid crystal display panel comprises a liquid crystal display screen 1, a backlight module 5 and a plastic rear shell 2, wherein the liquid crystal display screen 1 is fixedly connected with the plastic rear shell 2 through a plurality of bolts I3, and the backlight module 5 is arranged in the plastic rear shell 2 and is fixedly connected with the liquid crystal display screen 1 through a plurality of bolts II 6.
The working principle and the beneficial effects of the technical scheme are as follows: the arrangement of the first bolt 3 is beneficial to realizing the installation and the disassembly of the liquid crystal screen 1 and the plastic rear shell 2, and when the liquid crystal screen 1 is damaged, maintenance personnel can conveniently replace and maintain the liquid crystal screen; through setting up bolt two 6, be favorable to right backlight unit 5 is installed and is dismantled, unusual convenient and practical, can come to carry out intelligent regulation to the demonstration backlight of LCD screen according to the situation of change of ambient brightness fast through setting up backlight unit 5, make the demonstration backlight after the regulation more reliable and practical, the emergence of the visual impairment condition that causes has avoided the user to adjust in a subjective way and is shaded, stability has been improved, the effect of having solved among the prior art that current mode is adjusted backlight often is decided by user's subjective judgement, to the user that does not have professional optics theoretical basis, the effect of being shaded that uses this kind of regulation mode to adjust often not scientific and healthy reasonable lead to its to cause the problem of certain harm to user's eyes.
In one embodiment, as shown in fig. 2, the backlight module 5 includes:
the high-definition camera 501 is used for collecting a face image set of a viewer of the liquid crystal television;
a brightness detector 502 for detecting the ambient brightness of the space where the liquid crystal television is located;
the processor 503 is connected to the high-definition camera and the brightness detector, and is configured to determine a fatigue state of the human face image set according to the human face image set, and select an adaptive target backlight value according to the fatigue state and the ambient brightness;
a first controller 504, connected to the processor, for controlling the backlight adjusting assembly to adjust the current backlight value of the lcd tv to the target backlight value.
The beneficial effects of the above technical scheme are: the adjustment backlight value of the liquid crystal display television is comprehensively determined by evaluating the fatigue state of the viewers and combining the ambient brightness, so that the display requirements of the ambient brightness are met, the eyesight protection of the viewers is guaranteed, and the viewing experience of the user is further improved.
In one embodiment, referring to fig. 3, the plastic rear case 2 is provided with a plurality of heat dissipation ports 4 at the peripheral sides thereof. Be provided with a plurality of thermal module towards institute thermovent 4 in the plastics backshell 2, every thermal module 7 includes:
the first heat dissipation unit 701 includes a heat absorption plate near the heat source portion of the liquid crystal panel 1 and a heat dissipation plate assembly near the heat dissipation opening 4, and the heat absorption plate is made of a material with good heat conductivity. The heat absorption plate is closely connected with the heat source part on the back surface of the liquid crystal screen 1 through the rubber pad, the size of the heat absorption plate is preferably equal to that of the heat source part of the liquid crystal screen 1, heat can be well absorbed, mutual interference and shielding cannot occur, and the heat source part comprises a plurality of circuit boards and/or a display screen and is a main heating part of the liquid crystal screen 1.
The heat absorption plate is connected with the heat dissipation plate assembly through the heat pipe, the heat dissipation plate assembly dissipates heat absorbed by the heat absorption plate and transferred through the heat pipe, and the heat dissipation plate assembly is provided with a plurality of heat dissipation fins which are arranged in parallel, so that the heat dissipation area can be increased, and the heat dissipation effect is improved.
The heat pipe in the technical scheme comprises a pipe body and a heat absorption core body which is sleeved and fixed on the inner wall of the pipe body, working media are arranged in the heat absorption core body, the working media generally adopt refrigerants or water vapor and the like, when a heat absorption plate absorbs heat from a heat source part of the liquid crystal display 1, one end, close to the heat absorption plate, of the heat pipe is heated, so that the working media in the heat absorption core body are heated and evaporated, the working media vapor is in contact with a liquid absorption core with low temperature to emit heat when being transmitted to one end, close to a heat dissipation plate assembly, of the heat pipe, and then the condensed liquid is transmitted to one end, close to the heat absorption plate, through the capillary action, and the circulation process is completed. Therefore, heat can be transferred to the heat dissipation assembly from the heat absorption plate through evaporation and condensation of the working medium, so that heat dissipation of the heat source part of the liquid crystal display 1 is achieved, and basic heat dissipation is achieved.
The heat dissipation module 7 further comprises a second heat dissipation unit 702, wherein the second heat dissipation unit 702 comprises a heat dissipation fan blade close to the heat dissipation port 4, a driving motor for driving the heat dissipation fan blade to rotate for heat dissipation, and a transmission member for connecting the heat dissipation fan blade and the driving motor; the heat conducted to the heat sink assembly close to the second heat dissipation unit 702 can be quickly dissipated, so that further accelerated heat dissipation is realized;
the temperature detection module 703 comprises a plurality of temperature sensors, is arranged on the back of the liquid crystal screen 1 at intervals, and is used for detecting the temperature value of heat emitted by the liquid crystal screen 1; the real-time monitoring of the heat emitted by the liquid crystal screen 1 can be realized through the temperature detection module so as to avoid exceeding unnecessary limit;
the temperature analysis module 705 is configured to receive each temperature value data detected by the temperature detection module, calculate a temperature average value and a temperature standard deviation for each temperature value data, and send an alarm signal when the temperature average value is higher than a preset temperature threshold value and/or the temperature standard deviation is greater than the preset temperature standard deviation;
and the second controller 705 is configured to receive an alarm signal sent by the temperature analysis module, and control the driving motor to start and drive the heat dissipation fan blade to perform heat dissipation processing.
When the second controller 705 receives the alarm signal, it is described that the heat emitted from the liquid crystal screen 1 inside the plastic rear case 2 is accumulated or accumulated, and needs to be exhausted as soon as possible, at this time, the driving motor is started in time, and the heat dissipation fan blades are driven by the driving motor to increase the heat dissipation efficiency, so that the first heat dissipation unit 701 in the invention can ensure that the heat dissipated from the liquid crystal screen 1 is conducted out in real time to perform basic heat dissipation, when the basic heat dissipation cannot meet the requirement, the second controller 705 controls the heat dissipation fan blades to dissipate heat synchronously, which not only can improve the heat dissipation effect, but also can save energy, ensure that the heat dissipation fan blades are started only when needed, improve the heat dissipation pertinence, and effectively reduce the cost.
The beneficial effects of the above technical scheme are: thereby can dispel the heat to LCD screen 1 effectively through setting up heat dissipation module 7 and guarantee its work efficiency and job stabilization nature, indirectly prolonged the life of LCD screen and user's the experience of watching and feel.
The embodiment also discloses a backlight adjusting method, which is suitable for the lcd tv proposed by the above technical solution, and as shown in fig. 4, the method includes the following steps:
s101, collecting a face image set of a viewer and preprocessing the face image set;
s102, determining the fatigue state of a viewer according to the preprocessed human face image set, and determining a first recommended backlight value according to the fatigue state;
step S103, detecting the ambient brightness of a target space where the liquid crystal television is located, and determining a second recommended backlight value of the liquid crystal television based on the ambient brightness;
step S104, comprehensively determining an adjusting backlight value of the liquid crystal television according to the first recommended backlight value and the second recommended backlight value, and adjusting the backlight of the liquid crystal television;
in this embodiment, the preprocessing may be one or more of image de-drying, image enhancement, image smoothing, and image filtering;
the first recommended backlight value can be a backlight value which causes minimum damage to eyes of the viewer in the current fatigue state;
the second recommended backlight value is a television backlight value which is most suitable for the user to watch under the influence of the ambient brightness;
the working principle of the technical scheme is as follows: the method comprises the steps of collecting and preprocessing a face image set of a viewer, determining the fatigue state of the viewer according to the preprocessed face image set, determining a first recommended backlight value according to the fatigue state, detecting the ambient brightness of a target space where the liquid crystal television is located, determining a second recommended backlight value of the liquid crystal television based on the ambient brightness, comprehensively determining an adjusting backlight value of the liquid crystal television according to the first recommended backlight value and the second recommended backlight value, and adjusting backlight of the liquid crystal television.
The beneficial effects of the above technical scheme are: the backlight value of the liquid crystal television is comprehensively determined according to the fatigue state of the watching face and the ambient brightness of the target space where the liquid crystal television is located, so that the display effect of the liquid crystal television under the ambient brightness can be guaranteed, meanwhile, the visual damage to the watching personnel can be avoided to the maximum extent, the watching experience of a user is improved, the display effect of the liquid crystal television is also improved, and meanwhile, the practicability is also improved.
In one embodiment, before the collecting and preprocessing the set of facial images of the viewer, the method further comprises:
acquiring a visual coverage area of the display content of the liquid crystal display television in a target space;
setting a television viewer judgment condition according to the visual coverage area;
extracting sitting posture characteristic indexes and visual characteristic indexes of the watching testers in the coverage area;
establishing a watching evaluation model of the liquid crystal television according to the judging condition of the television watching personnel and the sitting posture characteristic index and the visual characteristic index of the watching testing personnel;
screening out target persons meeting the viewing requirements from the active persons in the visual coverage area by using the viewing evaluation model;
in this embodiment, the visual coverage area is an area where the content displayed on the display screen of the lcd tv can be completely observed by human eyes in the target space;
the above viewer determination condition may be: and judging the person staying in the visual coverage area for a time period greater than or equal to a preset time period as a viewer.
The beneficial effects of the above technical scheme are: the watching evaluation model of the liquid crystal television is constructed according to the test result and the judgment condition, so that the watchers of the active people in the visual coverage area can be quickly and accurately judged, the occurrence of false recognition is avoided, and the judgment accuracy and the working efficiency are improved.
In one embodiment, the acquiring and preprocessing a set of facial images of a viewer includes:
detecting a target distance between a viewer and the liquid crystal television;
setting exposure time and shooting pixels according to the target distance;
acquiring a face image of a viewer by setting parameters, detecting a fuzzy scale of the face image, confirming whether the fuzzy scale is smaller than or equal to a preset scale, if so, confirming that the face image is qualified, otherwise, confirming that the face image is unqualified, and readjusting the setting parameters to acquire the face image until the acquired face image is qualified;
combining the collected periodic face images of the viewers to obtain a face image set of the viewers;
and carrying out preprocessing work of drying removal and pixel optimization on the face image set.
The beneficial effects of the above technical scheme are: the exposure time is intelligently set according to the distance between the viewer and the liquid crystal display television, and the shooting pixels can more clearly and efficiently acquire the face image set of the viewer, so that a foundation is laid for subsequent fatigue state judgment work, further, the face image set can be more clearly processed through the preprocessing work of drying removal and pixel optimization on the face image set, and the practicability and the subsequent work efficiency are further improved.
In one embodiment, as shown in fig. 5, the determining a fatigue state of the viewer according to the preprocessed face image set, and the determining a first recommended backlight value according to the fatigue state includes:
step S201, extracting a human face feature set and a human eye feature set of a viewer according to the preprocessed human face image set;
step S202, determining the mental fatigue state of the viewer according to the human face feature set, and determining the visual fatigue state of the viewer according to the human eye feature set;
step S203, determining eye fatigue coefficients and mental fatigue coefficients of the viewers according to the mental fatigue states and the visual fatigue states;
step S204, determining a first recommended backlight value suitable for a viewer according to the eye fatigue coefficient and the mental fatigue coefficient;
in this embodiment, the method for extracting the face feature set and the eye feature set is a parameter extraction method;
the eye fatigue coefficient and the mental fatigue coefficient are calculated according to a preset fatigue coefficient calculation formula.
The beneficial effects of the above technical scheme are: the eye fatigue coefficient and the mental fatigue coefficient of the viewer can be determined respectively, so that the fatigue parameters of the viewer can be read out from the whole facial features of the viewer in an all-around mode, the first recommended backlight value can be rapidly determined, the rationality, the objectivity and the accuracy of the backlight value determination result are improved, and the viewer can have more perfect viewing experience.
In one embodiment, as shown in fig. 6, the detecting an ambient brightness of a target space where the lcd tv is located, and determining a second recommended backlight value of the lcd tv based on the ambient brightness includes:
step S301, determining a light intensity value corresponding to the ambient brightness;
step S302, calculating the influence coefficient of the ambient brightness on the backlight value of the liquid crystal display television according to the light intensity value;
step S303, acquiring a backlight partition of the liquid crystal television, and determining a current backlight value and a backlight coefficient of the liquid crystal television according to the backlight partition;
step S304, calculating a second recommended backlight value of the liquid crystal television according to the current backlight value, the backlight coefficient and the influence coefficient of the ambient brightness on the backlight value of the liquid crystal television;
in this embodiment, the influence coefficient of the ambient brightness on the backlight value of the lcd tv is represented as a difference between the display definition of the ambient brightness at the current backlight value of the lcd tv and the original display definition.
The beneficial effects of the above technical scheme are: the second recommended backlight value is calculated according to the backlight coefficient and the ambient brightness of the liquid crystal display television, so that the final recommended backlight value can be comprehensively calculated by considering the external ambient brightness and the multidirectional angle of the backlight parameter of the display screen, the display effect is not influenced when the display effect is compatible with the external ambient brightness, and the stability and the practicability are further improved.
In this embodiment, the calculating the influence coefficient of the ambient brightness on the backlight value of the lcd tv according to the light intensity value includes:
detecting the working time of the liquid crystal television;
evaluating the performance index of the backlight component of the liquid crystal television according to the working time;
determining luminous flux and attenuation coefficient thereof corresponding to the current backlight value of the liquid crystal display television;
calculating the influence coefficient of the ambient brightness on the backlight value of the liquid crystal television according to the parameters:
wherein β is a coefficient of influence of ambient brightness on a backlight value of the lcd-tv, ln is a natural logarithm, P is a maximum luminous flux of display content of the lcd-tv, P 'is a luminous flux corresponding to a current backlight value of the lcd-tv, α is an attenuation coefficient corresponding to the luminous flux corresponding to the current backlight value of the lcd-tv, t is a working time of the lcd-tv, t' is an ideal cycle working time of the lcd-tv, γ is a performance index of a backlight assembly of the lcd-tv, a is a luminous intensity value corresponding to the ambient brightness 1 Expressed as the light intensity value corresponding to the current backlight value of the LCD TV, A 2 A light intensity difference value expressed as a value that does not affect the visual viewing effect of the viewer;
the calculating a second recommended backlight value of the liquid crystal television according to the current backlight value, the backlight coefficient and the influence coefficient of the ambient brightness on the backlight value of the liquid crystal television comprises:
wherein gamma is expressed as a second recommended backlight value of the liquid crystal television, and gamma 1 Expressing as a current backlight value of the LCD TV, a as the current backlight value and the backlight coefficient, b as illumination compensation of a backlight assembly of the LCD TV, e as a natural constant, and k as a utilization coefficient of the backlight assembly;
wherein when
When the calculated result of (2) is greater than or equal to 0.5, the above formula takes gamma 1 +γ 1 … calculation mode when
When the calculated result of (3) is less than 0.5, the above formula takes γ 1 -γ 1 … calculation method;
in this embodiment, the working time of the lcd tv is represented as the working time of the lcd tv after the start;
the beneficial effects of the above technical scheme are: the influence degree of the ambient brightness on the backlight value of the liquid crystal display television can be intuitively evaluated by calculating the influence coefficient of the ambient brightness on the backlight value of the liquid crystal display television, so that a data reference condition is established for subsequently calculating a second recommended backlight value, further, the optimum recommended backlight value can be reasonably and accurately calculated by calculating the second recommended backlight value of the liquid crystal display television according to the self parameter of the backlight assembly and the influence factor brought by the ambient brightness, the display effect can be effectively ensured, and the practicability and the stability are further improved.
In one embodiment, comprehensively determining an adjusted backlight value of a liquid crystal television according to the first recommended backlight value and the second recommended backlight value and adjusting the backlight of the liquid crystal television comprises:
respectively determining backlight levels corresponding to the first recommended backlight value and the second recommended backlight value;
respectively calculating respective backlight diffusion distribution values of the first recommended backlight value and the second recommended backlight value according to the first recommended backlight value and the second recommended backlight value and the backlight levels corresponding to the first recommended backlight value and the second recommended backlight value by using a preset backlight diffusion function;
constructing a dimming matrix of a backlight adjusting component of the liquid crystal television according to the backlight diffusion distribution values corresponding to the first recommended backlight value and the second recommended backlight value respectively;
acquiring a matrix factor which repeatedly appears in the dimming matrix;
constructing a backlight matrix according to the repeated matrix factors;
acquiring a target backlight value corresponding to the backlight matrix from a preset database as an adjusting backlight value of the liquid crystal television;
calculating the backlight adjusting value of each partition according to the backlight coefficient of each partition in the backlight partition of the liquid crystal display television and the adjusting backlight value;
generating an independent backlight adjusting signal of each partition according to the backlight adjusting value of each partition to adjust the backlight of the liquid crystal television;
in this embodiment, the backlight level is represented as the backlight level of the first recommended backlight value and the second recommended backlight value;
the backlight diffusion distribution value is represented as a brightness value of each distribution point in a backlight diffusion interval of the first recommended backlight value and the second recommended backlight value in the target space.
The beneficial effects of the above technical scheme are: the backlight adjustment value of each partition can be calculated and the independent backlight adjustment signal of the partition is generated to adjust the backlight of the liquid crystal television, so that the backlight adjustment value of the partition can be accurately calculated and independently adjusted according to the backlight parameters of different backlight partitions of the liquid crystal television, and the influence of other partitions is avoided, so that the display result and the stability are further ensured.
In this embodiment, the step of generating the independent backlight adjustment signal of each partition according to the backlight adjustment value of the partition to perform backlight adjustment on the lcd tv includes:
converting the independent backlight adjusting signal of each subarea into a time sequence signal;
acquiring the light spot distribution of each partition;
determining the backlight adjusting mode of each subarea according to the light spot distribution of each subarea;
transmitting the timing signal to each partition through a first driving circuit or a second driving circuit according to the backlight adjustment mode of each partition to perform backlight adjustment;
the first driving circuit is a horizontal driving circuit, and the second driving circuit is a vertical driving circuit.
The beneficial effects of the above technical scheme are: the driving circuit can be selected more stably and accurately to control the backlight regulation work of each partition by determining the backlight regulation mode of each partition, the practicability is further improved while the control stability is improved, and furthermore, faster and more stable efficiency can be provided for the follow-up stable control and signal transmission work by converting independent backlight signals into sequential signals.
In one embodiment, the constructing a dimming matrix of a backlight adjusting component of a liquid crystal television according to the backlight diffusion distribution values corresponding to the first recommended backlight value and the second recommended backlight value respectively includes:
acquiring backlight diffusion distribution values corresponding to the first recommended backlight value and the second recommended backlight value respectively, and confirming the backlight diffusion distribution values as a first backlight diffusion distribution value and a second backlight diffusion distribution value;
establishing a first original matrix based on the first backlight diffusion distribution value, and simultaneously establishing a second original matrix based on the second backlight diffusion distribution value;
respectively acquiring the number of rows and the number of columns corresponding to each original matrix, and simultaneously respectively acquiring a first rank corresponding to the first original matrix and a second rank corresponding to the second original matrix;
acquiring a first row difference between the first rank and the row number corresponding to the first original matrix and a first column difference between the first rank and the column number corresponding to the first original matrix;
respectively judging whether the first row difference and the first column difference are within a first preset range, and inputting the judgment result into a preset logic AND gate to obtain a logic result;
if the logic result is 0, determining that the first original matrix belongs to a first low-rank matrix;
meanwhile, acquiring a second row difference between the second rank and the corresponding row number and a second column difference between the second rank and the corresponding column number;
respectively judging whether the second row difference and the second column difference are within a second preset range, and inputting the judgment result into a preset logic AND gate to obtain a logic result;
if the logic result is 0, determining that the second original matrix belongs to a second low-rank matrix;
performing adaptive training on each low-rank matrix by using an initial convolution kernel to obtain a corresponding first convolution kernel and a corresponding second convolution kernel;
obtaining the first convolution kernelOne size, denoted as n 1 *n 1 Obtaining a second size, denoted as n, of said second convolution kernel 2 *n 2 ；
Generating a corresponding first decomposition factor n based on the first size and the second size 1 1, a second decomposition factor n 2 *1；
Sequentially decomposing each element in the first low-rank matrix by using the first decomposition factor, eliminating redundancy of the first low-rank matrix, and generating a first backlight matrix;
sequentially decomposing each element in the second low-rank matrix by using the second decomposition factor, eliminating redundancy of the second low-rank matrix, and generating a second backlight matrix;
and performing mutual adaptation training on the parity elements of the first backlight matrix and the second backlight matrix to construct a dimming matrix of a backlight adjusting component of the liquid crystal television.
In this example, the first original matrix represents an iso-scaled matrix established according to the distribution of the first backlight diffusion distribution values;
in this example, the second original matrix represents an iso-scaled matrix established according to the distribution of the second backlight diffusion distribution values;
in this example, the low rank matrix represents a matrix with a large number of invalid elements in the matrix;
in this example, the first backlight matrix represents a matrix generated after eliminating redundancy in the first original matrix;
in this example, the second backlight matrix represents a matrix generated after eliminating redundancy in the second original matrix;
in this example, the mutually adaptive training represents a process of converging elements at the same element position of the first backlight matrix and the second backlight matrix to make two element regions have a fixed value.
The working principle of the technical scheme is as follows: firstly, a first original matrix and a second original matrix are established according to a first backlight diffusion distribution value and a second backlight diffusion distribution value, whether the matrix belongs to a low-rank matrix or not is analyzed according to the difference value of the rank of each original matrix and the row number and the column number of the matrix, if the matrix belongs to the low-rank matrix, the matrix contains a large amount of redundant information, an initial convolution kernel is used for obtaining an actual convolution kernel of the matrix, the actual convolution kernel is decomposed into corresponding decomposition factors, the decomposition factors are used for eliminating the redundancy in the original matrix, two backlight matrices can be obtained, and finally, the two backlight matrices are trained in a mutually adaptive mode to construct a dimming matrix.
The beneficial effects of the above technical scheme are that: the dimming matrix is the root of dimming, so when the dimming matrix is constructed, various factors need to be considered, the initial matrix is generated according to the backlight diffusion coefficient, the initial matrix is analyzed, redundant information in the initial matrix is eliminated, and then construction work is executed, so that the purpose of dimming is achieved, the redundant information is eliminated, the dimming duration is shortened, and the best dimming effect is provided for a user in the shortest time.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A liquid crystal television, the apparatus comprising:
the backlight module comprises a liquid crystal screen (1), a backlight module (5) and a plastic rear shell (2), wherein the back surface of the liquid crystal screen (1) is fixedly connected with the plastic rear shell (2) through a plurality of bolts I (3), and the backlight module (5) is arranged in the plastic rear shell (2) and is fixedly connected with the liquid crystal screen (1) through a plurality of bolts II (6);
the backlight module (5) comprises:
the high-definition camera is used for collecting a face image set of a viewer of the liquid crystal television;
the brightness detector is used for detecting the ambient brightness of the space where the liquid crystal television is located;
the processor is simultaneously connected with the high-definition camera and the brightness detector and used for judging the fatigue state of the human face image set according to the human face image set and selecting an adaptive target backlight value according to the fatigue state and the environment brightness;
and the first controller is connected with the processor and is used for controlling the backlight adjusting component to adjust the current backlight value of the liquid crystal television to the target backlight value.
2. The lcd tv of claim 1, wherein the plastic rear case (2) is provided with a plurality of heat dissipation ports (4) at the peripheral sides thereof, and a plurality of heat dissipation modules are arranged in the plastic rear case (2) towards the heat dissipation ports (4), each heat dissipation module comprising:
the first heat dissipation unit comprises a heat absorption plate close to a heat source part of the liquid crystal display (1) and a heat dissipation piece assembly close to the heat dissipation opening (4), the heat absorption plate is connected with the heat dissipation piece assembly through a heat pipe, the heat dissipation piece assembly dissipates heat absorbed by the heat absorption plate and transferred through the heat pipe, and a plurality of heat dissipation fins arranged in parallel are arranged on the heat dissipation piece assembly;
the second heat dissipation unit comprises a heat dissipation fan blade close to the heat dissipation port (4), a driving motor for driving the heat dissipation fan blade to rotate for heat dissipation and a transmission piece for connecting the heat dissipation fan blade and the driving motor;
the temperature detection module comprises a plurality of temperature sensors which are arranged on the back surface of the liquid crystal screen (1) at intervals and used for detecting the temperature value of heat emitted by the liquid crystal screen (1);
the temperature analysis module is used for receiving each temperature value data detected by the temperature detection module, calculating a temperature average value and a temperature standard deviation of each temperature value data, and sending an alarm signal when the temperature average value is higher than a preset temperature threshold value and/or the temperature standard deviation is larger than the preset temperature standard deviation;
and the second controller is used for receiving the alarm signal sent by the temperature analysis module and controlling the driving motor to start and drive the heat dissipation fan blade to perform heat dissipation treatment.
3. The LCD TV of claim 1, characterized in that the heat absorbing plate is tightly connected with a heat source part on the back of the LCD screen (1) through a rubber mat, and the heat source part comprises a plurality of circuit boards and/or display screens;
the heat pipe comprises a pipeline body and a heat absorption core body sleeved and fixed on the inner wall of the pipeline body, and working media are arranged in the heat absorption core body.
4. A backlight adjusting method applied to the liquid crystal television set of claims 1 to 3, comprising the steps of:
acquiring a face image set of a viewer through a high-definition camera and preprocessing the face image set;
determining the fatigue state of a viewer according to the preprocessed face image set, and determining a first recommended backlight value according to the fatigue state;
detecting the ambient brightness of a target space where the liquid crystal television is located, and determining a second recommended backlight value of the liquid crystal television based on the ambient brightness;
and comprehensively determining an adjusting backlight value of the liquid crystal television according to the first recommended backlight value and the second recommended backlight value, and adjusting the backlight of the liquid crystal television.
5. The backlight adjustment method of claim 4, wherein prior to acquiring and pre-processing the set of facial images of the viewer, the method further comprises:
acquiring a visual coverage area of the display content of the liquid crystal display television in a target space;
setting a television viewer judgment condition according to the visual coverage area;
extracting sitting posture characteristic indexes and visual characteristic indexes of the watching testers in the coverage area;
establishing a watching evaluation model of the liquid crystal television according to the judging condition of the television watching personnel and the sitting posture characteristic index and the visual characteristic index of the watching testing personnel;
and screening out target persons meeting the viewing requirements from the active persons in the visual coverage area by using the viewing evaluation model.
6. The backlight adjustment method according to claim 4, wherein the collecting and preprocessing a set of human face images of a viewer comprises:
detecting a target distance between a viewer and the liquid crystal television;
setting exposure time and shooting pixels according to the target distance;
acquiring a face image of a viewer by setting parameters, detecting a fuzzy scale of the face image, confirming whether the fuzzy scale is smaller than or equal to a preset scale, if so, confirming that the face image is qualified, otherwise, confirming that the face image is unqualified, and readjusting the setting parameters to acquire the face image until the acquired face image is qualified;
combining the collected periodic face images of the viewers to obtain a face image set of the viewers;
and carrying out preprocessing work of drying removal and pixel optimization on the face image set.
7. The backlight adjustment method of claim 4, wherein the determining a fatigue state of the viewer according to the preprocessed face image set, and the determining the first recommended backlight value according to the fatigue state comprises:
extracting a human face feature set and a human eye feature set of the viewer according to the preprocessed human face image set;
determining the mental fatigue state of the viewer according to the human face feature set, and determining the visual fatigue state of the viewer according to the human eye feature set;
determining eye fatigue coefficients and mental fatigue coefficients of the viewers according to the mental fatigue states and the visual fatigue states;
and determining a first recommended backlight value suitable for the viewer according to the eye fatigue coefficient and the mental fatigue coefficient.
8. The backlight adjustment method according to claim 4, wherein the detecting an ambient brightness of a target space where the LCD TV is located, and the determining a second recommended backlight value of the LCD TV based on the ambient brightness comprises:
determining a light intensity value corresponding to the ambient brightness;
calculating the influence coefficient of the ambient brightness on the backlight value of the liquid crystal display television according to the light intensity value;
acquiring a backlight partition of the liquid crystal display television, and determining a current backlight value and a backlight coefficient of the liquid crystal display television according to the backlight partition;
and calculating a second recommended backlight value of the liquid crystal television according to the current backlight value, the backlight coefficient and the influence coefficient of the ambient brightness on the backlight value of the liquid crystal television.
9. The backlight adjustment method of claim 8, wherein comprehensively determining an adjusted backlight value of a liquid crystal television according to the first recommended backlight value and the second recommended backlight value and performing backlight adjustment on the liquid crystal television comprises:
respectively determining backlight levels corresponding to the first recommended backlight value and the second recommended backlight value;
respectively calculating respective backlight diffusion distribution values of the first recommended backlight value and the second recommended backlight value according to the first recommended backlight value and the second recommended backlight value and the backlight levels corresponding to the first recommended backlight value and the second recommended backlight value by using a preset backlight diffusion function;
constructing a dimming matrix of a backlight adjusting component of the liquid crystal television according to the backlight diffusion distribution values corresponding to the first recommended backlight value and the second recommended backlight value respectively;
acquiring a matrix factor which repeatedly appears in the dimming matrix;
constructing a backlight matrix according to the repeated matrix factors;
acquiring a target backlight value corresponding to the backlight matrix from a preset database as an adjusting backlight value of the liquid crystal television;
calculating the backlight adjusting value of each partition according to the backlight coefficient of each partition in the backlight partition of the liquid crystal display television and the adjusting backlight value;
and generating an independent backlight adjusting signal of each subarea according to the backlight adjusting value of each subarea to adjust the backlight of the liquid crystal television.
10. The backlight adjustment method according to claim 9, wherein the constructing a dimming matrix of a backlight adjustment component of a liquid crystal television according to the backlight diffusion distribution values corresponding to the first recommended backlight value and the second recommended backlight value respectively comprises:
acquiring backlight diffusion distribution values corresponding to the first recommended backlight value and the second recommended backlight value respectively, and confirming the backlight diffusion distribution values as a first backlight diffusion distribution value and a second backlight diffusion distribution value;
establishing a first original matrix based on the first backlight diffusion distribution value, and simultaneously establishing a second original matrix based on the second backlight diffusion distribution value;
respectively acquiring the number of rows and the number of columns corresponding to each original matrix, and simultaneously respectively acquiring a first rank corresponding to the first original matrix and a second rank corresponding to the second original matrix;
acquiring a first row difference between the first rank and the row number corresponding to the first original matrix and a first column difference between the first rank and the column number corresponding to the first original matrix;
respectively judging whether the first row difference and the first column difference are within a first preset range, and inputting the judgment result into a preset logic AND gate to obtain a logic result;
if the logic result is 0, determining that the first original matrix belongs to a first low-rank matrix;
meanwhile, acquiring a second row difference between the second rank and the corresponding row number and a second column difference between the second rank and the corresponding column number;
respectively judging whether the second row difference and the second column difference are within a second preset range, and inputting the judgment result into a preset logic AND gate to obtain a logic result;
if the logic result is 0, determining that the second original matrix belongs to a second low-rank matrix;
performing adaptive training on each low-rank matrix by using an initial convolution kernel to obtain a corresponding first convolution kernel and a corresponding second convolution kernel;
obtaining a first size, denoted as n, of the first convolution kernel 1 *n 1 Obtaining a second size, denoted as n, of said second convolution kernel 2 *n 2 ；
Generating a corresponding first decomposition factor n based on the first size and the second size 1 1, a second decomposition factor n 2 *1；
Sequentially decomposing each element in the first low-rank matrix by using the first decomposition factor, eliminating redundancy of the first low-rank matrix, and generating a first backlight matrix;
sequentially decomposing each element in the second low-rank matrix by using the second decomposition factor, eliminating redundancy of the second low-rank matrix, and generating a second backlight matrix;
and performing mutual adaptation training on the parity elements of the first backlight matrix and the second backlight matrix to construct a dimming matrix of a backlight adjusting component of the liquid crystal television.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102028577A (en) * | 2010-10-27 | 2011-04-27 | 冠捷显示科技（厦门）有限公司 | Intelligent eye vision protection system |
| CN204145635U (en) * | 2014-10-13 | 2015-02-04 | 彩迅工业(深圳)有限公司 | A kind of LCD TV of ultra-narrow frame |
| CN205376028U (en) * | 2016-01-12 | 2016-07-06 | 深圳Tcl数字技术有限公司 | Display |
| WO2016110145A1 (en) * | 2015-01-08 | 2016-07-14 | 小米科技有限责任公司 | Method and device for setting screen brightness |
| CN111124534A (en) * | 2019-12-05 | 2020-05-08 | 深圳智锐通科技有限公司 | Intelligent eye protection computer |
| CN113031897A (en) * | 2021-04-23 | 2021-06-25 | 努比亚技术有限公司 | Terminal eye protection method, terminal and storage medium |
-
2022
- 2022-05-20 CN CN202210548815.8A patent/CN114822423A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102028577A (en) * | 2010-10-27 | 2011-04-27 | 冠捷显示科技（厦门）有限公司 | Intelligent eye vision protection system |
| CN204145635U (en) * | 2014-10-13 | 2015-02-04 | 彩迅工业(深圳)有限公司 | A kind of LCD TV of ultra-narrow frame |
| WO2016110145A1 (en) * | 2015-01-08 | 2016-07-14 | 小米科技有限责任公司 | Method and device for setting screen brightness |
| CN205376028U (en) * | 2016-01-12 | 2016-07-06 | 深圳Tcl数字技术有限公司 | Display |
| CN111124534A (en) * | 2019-12-05 | 2020-05-08 | 深圳智锐通科技有限公司 | Intelligent eye protection computer |
| CN113031897A (en) * | 2021-04-23 | 2021-06-25 | 努比亚技术有限公司 | Terminal eye protection method, terminal and storage medium |
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