CN116030743B - LED display and brightness adjustment detection structure thereof - Google Patents

LED display and brightness adjustment detection structure thereof Download PDF

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Publication number
CN116030743B
CN116030743B CN202310323189.7A CN202310323189A CN116030743B CN 116030743 B CN116030743 B CN 116030743B CN 202310323189 A CN202310323189 A CN 202310323189A CN 116030743 B CN116030743 B CN 116030743B
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led backlight
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CN116030743A (en
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罗文华
李建伟
岑业芳
陈俊生
刘卫华
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Hefei Huntkey Display Technology Co ltd
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Abstract

The invention discloses an LED display and a brightness adjustment detection structure thereof, comprising: the detection assembly is used for detecting illumination intensity and comprises a detection rod with a hollow structure, a plurality of illumination intensity sensors and an ultrasonic ranging module I, wherein the illumination intensity sensors are arranged at the lower part of the detection rod; the moving assembly is used for driving the detecting assembly to linearly move and comprises a power assembly and a guide assembly, and two ends of the detecting rod are respectively connected with the power assembly and the guide assembly; the processing module is used for processing the data transmitted by the detection assembly and is connected with the illumination intensity sensor and the ultrasonic ranging module I; and the distance sensor is used for detecting the position of the rod and is arranged on one side of the guide assembly. The invention carries out final detection on the luminous ratio parameters of the installed LED backlight assembly, and avoids the situation that the installed LED backlight assembly does not reach the production standard.

Description

LED display and brightness adjustment detection structure thereof
Technical Field
The invention relates to the technical field of LED displays, in particular to an LED display and a brightness adjustment detection structure thereof.
Background
The LED display is a display taking LED lamps as backlight, the LEDs are short for semiconductor light emitting diodes, the optical and electrical characteristics of the LEDs are mostly the same as those of the light emitting diodes, the LEDs are internally provided with a plurality of LED lamps, when the LEDs are driven at the same voltage, the display brightness of each LED lamp is different due to the influences of factors such as the production process and the material process of the LEDs, wherein the ratio of the maximum value to the minimum value in the luminous intensity of each LED is called as the luminous intensity ratio, and the luminous intensity ratio is an important parameter of the LED display. In the existing theory, two detection methods are often adopted for detecting the illumination intensity: fixed distance methods and constant illuminance methods.
Fixed distance method, firstly, measuring photocurrent of standard LED lamp at distance r
Figure SMS_1
Then detecting the photocurrent of the LED lamp to be detected at the same position>
Figure SMS_2
The light intensity of the LED lamp to be tested is +.>
Figure SMS_3
Wherein->
Figure SMS_4
For the illumination intensity of standard lamps, +.>
Figure SMS_5
Is the light intensity of the lamp to be measured.
The method of equal illuminance first measures the distance as
Figure SMS_6
Photocurrent of a standard LED lamp at +.>
Figure SMS_7
The method comprises the steps of carrying out a first treatment on the surface of the Then moving the LED lamp to be tested until the photocurrent is +.>
Figure SMS_8
When the LED lamp to be measured is at a certain distance from the detector, the distance of the LED lamp to be measured from the detector is measured>
Figure SMS_9
Then->
Figure SMS_10
Wherein->
Figure SMS_11
For the illumination intensity of standard lamps, +.>
Figure SMS_12
Is the light intensity of the lamp to be measured.
In the traditional production, the LED lamp is generally subjected to independent spot inspection, the LED lamp which is qualified in spot inspection enters an assembly production line for assembly, and the spot inspection inevitably has missed inspection, so that the display brightness is uneven in the later use process of the LED display; meanwhile, the traditional display does not detect the LED backlight before starting up, so that the problem of the backlight cannot be found, the problem of the backlight can be found after disassembly, and the fault elimination by maintenance personnel is not facilitated.
Disclosure of Invention
The invention aims to provide an LED display and a brightness adjustment detection structure thereof, which can detect the illumination ratio of an LED backlight lamp again during assembly, and can carry out self-detection on the LED backlight lamp in the use process after delivery, thereby being convenient for fault discovery and discharge and solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: a brightness adjustment detection structure, comprising:
the detection assembly is used for detecting illumination intensity and comprises a detection rod with a hollow structure, an ultrasonic ranging module I and a plurality of illumination intensity sensors, wherein the ultrasonic ranging module I is arranged at the lower part of the detection rod;
the moving assembly is used for driving the detecting assembly to linearly move and comprises a power assembly and a guide assembly, and two ends of the detecting rod are respectively connected with the power assembly and the guide assembly;
the processing module is used for processing the incoming data of the detection assembly, and the processing module is connected with the illumination intensity sensor and the ultrasonic ranging module I.
And the distance sensor is used for detecting the position of the rod and is arranged on one side of the guide assembly.
Preferably, the processing module comprises a single chip microcomputer module and an external storage module, and the single chip microcomputer module is connected with the external storage module.
Preferably, the power assembly comprises a moving motor, a screw rod connected with an output shaft of the moving motor, a moving block in threaded connection with the outer surface of the screw rod, a first connecting plate and a supporting bearing, wherein the first connecting plate and the supporting bearing are sleeved outside the screw rod, one end, away from the moving motor, of the screw rod is connected with the inner part of the supporting bearing, and the first connecting plate is connected with one side of the moving block.
Preferably, the guide assembly comprises a guide slide bar, a guide slide block arranged outside the guide slide bar in a sliding manner, a limiting piece arranged on one side of the guide slide bar and a second connecting plate sleeved on the guide slide bar, the second connecting plate is connected with one side of the guide slide block, and two ends of the detection rod are respectively connected with the first connecting plate and the second connecting plate.
Preferably, the detection assembly further comprises a plurality of auxiliary LED lamps arranged on the upper portion of the detection rod and an ultrasonic ranging module II arranged on one side of the upper portion of the detection rod, and the ultrasonic ranging module II is connected with the processing module.
The utility model provides a LED display, includes a luminance adjustment detection structure, still includes drain pan, liquid crystal module and sets up the controller in the drain pan outside, liquid crystal module is including setting up LED backlight unit and the screen subassembly at the drain pan inner wall, LED backlight unit includes a plurality of LED backlight unit, be provided with a plurality of LED backlight on the LED backlight unit, the LED backlight is connected with the controller, the screen subassembly includes polaroid one, TFT board, liquid crystal, C/F glass and polaroid two, polaroid one, TFT board, liquid crystal, C/F glass and polaroid two pile up the setting in proper order in one side of LED backlight unit, luminance adjustment detection structure sets up inside the drain pan, and is located the upside of LED backlight unit, the controller is connected with processing module.
Preferably, a plurality of auxiliary LED lamps are respectively connected with the controller.
Preferably, the illumination intensity sensor corresponds to the position of the LED backlight.
Compared with the prior art, the invention has the beneficial effects that:
1. in the process of assembling the LED display, the invention can finally detect the parameters of the installed LED backlight assembly in the mode, and compare the parameters with the illumination intensity data of the standard LED lamps of the LED backlight lamp preset in the external storage module, thereby avoiding the occurrence of the installed LED backlight assembly and not reaching the parameters of the standard LED lamp specified by the production standard; meanwhile, a self-checking mode before starting can be set in the product use process, the controller is used for controlling the brightness adjustment detection structure to work before starting each time, the self-checking before starting is carried out on the LED backlight assembly, and when the parameters of the LED backlight assembly are in a problem, the controller is used for reminding a user of the failure of the LED backlight assembly and timely repairing the LED display.
2. According to the invention, a plurality of auxiliary LED lamps and an ultrasonic ranging module II are arranged on the surface of the upper part of the detection rod, the distance between the auxiliary LED lamps and a polaroid I on the upper part of the detection rod is measured through the ultrasonic ranging module, and the distance information is transmitted to the processing module. When a fault is detected, the controller controls the detection rod to move to a row where the fault LED backlight lamp is located, and an auxiliary LED lamp above the auxiliary LED lamp corresponding to the fault LED backlight lamp is turned on; the auxiliary LED lamps on the upper part of the detection rod are controlled by the over-controller to be fully lightened, the LED backlight is simulated, the blocking of the LED backlight by the detection rod is avoided, the display is enabled to display abnormality, and in this way, emergency use can be carried out under the condition of failure of the LED backlight.
Drawings
FIG. 1 is a schematic diagram of an external structure of an LED display according to the present invention;
FIG. 2 is an exploded view of an LED display and a brightness adjustment detection structure thereof according to embodiment 1 of the present invention;
FIG. 3 is an exploded view of the brightness adjustment detecting structure according to embodiment 1 of the present invention;
FIG. 4 is an exploded view of an LED display and a brightness adjustment detection structure thereof according to embodiment 2 of the present invention;
FIG. 5 is an exploded view of the brightness adjustment detecting structure according to embodiment 2 of the present invention;
FIG. 6 is an enlarged schematic view of the structure shown in FIG. 5A;
FIG. 7 is a schematic diagram of a side view of an LED display according to the present invention;
fig. 8 is a block diagram of the modular connection of the present invention.
In the figure: the detection device comprises a detection component 1, a moving component 2, a processing module 3, a distance sensor 4, an ultrasonic ranging module II 5, an auxiliary LED lamp 6, a detection rod 101, an illumination intensity sensor 102, an ultrasonic ranging module I103, a power component 201, a guide component 202, a moving motor 2011, a screw 2012, a moving block 2013, a connecting plate I2014, a supporting bearing 2015, a guide sliding rod 2021, a guide sliding block 2022, a limiting piece 2023, a connecting plate II 2024, a bottom shell 10, a liquid crystal module 11, a controller 12, an LED backlight component 1101, a screen component 1102, an LED backlight plate 11011 and an LED backlight 11012.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
As shown in fig. 3, the present invention provides a technical solution: a brightness adjustment detection structure, comprising: a detection assembly 1, a movement assembly 2, a processing module 3 and a distance sensor 4,
the detection assembly 1 is used for detecting illumination intensity and comprises a detection rod 101 with a hollow structure, illumination intensity sensors 102 and an ultrasonic ranging module I103, wherein the illumination intensity sensors 102 are arranged at the lower part of the detection rod 101 and are matched with the LED backlight plates 11011 in number;
the moving component 2 is used for driving the detecting component 1 to move linearly and comprises a power component 201 and a guiding component 202.
An output shaft of a mobile motor 2011 in the power assembly 201 is connected with a screw 2012, a mobile block 2013 in external threaded connection with the screw 2012, a connecting plate one 2014 is sleeved outside the screw 2012, one end of the screw 2012, which is far away from the mobile motor, is connected with a support bearing 2015, and the connecting plate one 2014 is connected with one side of the mobile block 2013; two ends of a guide slide bar 2021 in the guide assembly 202 are connected with the inner wall of the base, a guide slide block 2022 is slidably arranged outside the guide slide bar 2021, a limit piece 2023 is arranged on one side of the guide slide bar 2021, a second connecting plate 2024 sleeved on the guide slide bar 2021 is connected with one side of the guide slide block 2022, and two ends of the detection rod 101 are respectively connected with the first connecting plate 2014 and the second connecting plate 2024. One end of the distance sensor 4 is connected to the inner wall of the bottom case 10 for detecting the position of the lever 101.
The processing module 3 is used for processing the incoming data of the detection assembly 1, the processing module 3 is connected with the illumination intensity sensor 102 and the ultrasonic ranging module I103, and meanwhile, the processing module 3 is composed of a single chip microcomputer module and an external storage module connected with the single chip microcomputer module.
As shown in fig. 1 and 2, the present invention further provides an LED display, including a brightness adjustment detection structure, a bottom shell 10 is further disposed at an outer side of the brightness adjustment detection structure, a liquid crystal module 11 is further installed on an inner wall of the bottom shell 10, a controller 12 is installed at an outer side of the bottom shell 10, the liquid crystal module 11 includes an LED backlight assembly 1101 and a screen assembly 1102, which are installed on an inner wall of the bottom shell 10, the LED backlight assembly 1101 includes a plurality of LED backlight plates 11011, a plurality of LED backlight lamps 11012 are installed on the LED backlight plates 11011, the LED backlight 11012 is connected with the controller 12, the screen assembly 1102 includes a polarizer one, a TFT plate, a liquid crystal, a C/F glass and a polarizer two, the polarizer one, the TFT plate, the liquid crystal, the C/F glass and the polarizer two are sequentially stacked on one side of the LED backlight assembly 1101, and the controller 12 is connected with the processing module 3.
The illumination intensity sensor 102 corresponds to the position of the LED backlight 11012, and the distance sensor 4 is mounted on one end of the guide slide bar 2021, for detecting the moving position of the guide slide block 2022.
In this embodiment, the light intensity sensor 102 mounted on the lower portion of the detecting rod 101 detects the light current intensity of the LED backlight 11012 below the light intensity sensor, and the data information of the light current intensity is transmitted to the single-chip microcomputer module, which stores the information in the external storage module.
The plurality of LED light plates are distributed in parallel on the inner wall of the bottom shell 10, each backlight plate is provided with a plurality of LED backlight lamps 11012 which are distributed linearly, and an LED lamp lattice consisting of the plurality of LED backlight lamps 11012 is formed on the inner wall of the bottom shell 10.
The controller 12 controls the mobile motor 2011 to start, the mobile motor 2011 drives the screw 2012 to rotate, the screw 2012 rotates to drive the mobile block 2013 to move along the axis direction of the screw 2012, the mobile block 2013 drives the detection rod 101 to move through the first connecting plate 2014, the detection rod 101 drives the guide slide block 2022 to slide on the guide slide bar 2021 through the second connecting plate 2024 connected with the other end of the mobile block, the moving distance of the guide slide block 2022 can be detected through the distance sensor 4, the distance information is transmitted to the controller 12, the controller 12 can control the detection rod 101 to have the same moving distance each time and the distance between two backlight LED lamps, so that the row-by-row detection of the LED backlight lamps 11012 can be realized, the illumination intensity sensors 102 are all installed at the bottom of the detection rod 101, the distance between each illumination intensity detector and the LED backlight lamps 11012 is ensured to be consistent, and each illumination intensity at the moment is reflected to the intensity of photocurrent of the illumination intensity sensors 102 according to the fixed distance principle;
because each of the LED backlights 11012 is connected to the controller 12, the controller 12 can control the turning on and off of the LED backlight 11012 row by row, and the controller 12 cooperates with the movement of the detection rod 101, when the detection rod 101 moves to above the corresponding LED backlight 11012, the same driving voltage is applied to the LED backlight 11012 through the controller 12, the LED backlight 11012 is turned on, the illumination intensity of the LED backlight 11012 is detected through the illumination intensity sensor 102, and the photocurrent information corresponding to the illumination intensity of each of the LED backlights 11012 (all labeled on the LED lamps when the LED lamps leave the factory) is stored in the external storage module. To all rightAfter the detection of the LED backlight 11012 is completed, the singlechip module calls out data information from the external storage module to perform operation, and the light intensity of the LED lamp
Figure SMS_13
(in the formula, < >)>
Figure SMS_14
For the illumination intensity of standard lamps, +.>
Figure SMS_15
To be the light intensity of the lamp to be tested), the maximum current value and the minimum current value are compared, if the ratio is between 1.5 and 2.3, the parameters of the LED backlight assembly 1101 are normal, and at this time, the moving motor 2011 moves the detecting rod 101 to the edge of the bottom shell 10, so that the light of the LED backlight 11012 is not blocked.
In the process of assembling the LED display, the final detection can be performed on the parameters of the installed LED backlight assembly 1101 in this way, and the parameters are compared with the illumination intensity data of the standard LED lamps of the LED backlight 11012 preset in the external storage module, so that the occurrence of the parameters of the installed LED backlight assembly 1101, which do not reach the standard LED lamps specified by the production standard, can be avoided;
meanwhile, a self-checking mode before starting can be installed in the product using process, the controller 12 is used for controlling the brightness adjustment detection structure to work before starting each time, the self-checking before starting is carried out on the LED backlight assembly 1101, when the parameters of the LED backlight assembly 1101 are in a problem, a user is reminded of the failure of the LED backlight assembly 1101 through the controller 12, the LED display is repaired in time, and the reminding mode can be an audible and visual signal such as flickering of a power lamp.
Example 2
As shown in fig. 5, the present invention provides a technical solution: a brightness adjustment detection structure comprises a detection assembly 1, a moving assembly 2, a processing module 3 and a distance sensor 4.
The detection assembly 1 comprises a detection rod 101 with a hollow structure, an illumination intensity sensor 102 and an ultrasonic ranging module I103, wherein the illumination intensity sensor 102 and the ultrasonic ranging module I103 are installed on the lower portion of the detection rod 101 and matched with the LED backlight plate 11011, a plurality of auxiliary LED lamps 6 and an ultrasonic ranging module II 5 are installed on one side of the upper portion of the detection rod 101, the ultrasonic ranging module II 5 is connected with the processing module 3, and each auxiliary LED lamp 6 is respectively and independently connected with the controller 12.
The processing module 3 comprises a singlechip module and an external storage module connected with the singlechip module, the processing module 3 is used for processing the incoming data of the detection assembly 1, and the illumination intensity sensor 102 and the ultrasonic ranging module I103 are connected with the processing module 3.
The distance sensor 4 is installed at one side of the guide assembly 202 for detecting the position of the lever 101.
An output shaft of a moving motor 2011 in the power assembly 201 is connected with a screw 2012, a moving block 2013 is connected to the outer surface of the screw 2012 in a threaded manner, a connecting plate 2014 is sleeved outside the screw 2012 and connected with one side of the moving block 2013, and one end of the screw 2012, far away from the moving motor 2011, is connected with the inside of the supporting bearing 2015.
The outside of the guide slide bar 2021 in the guide assembly 202 is slidably provided with a guide slide block 2022, a limiting piece 2023 is arranged on one side of the guide slide bar 2021, a second connecting plate 2024 sleeved on the guide slide bar 2021 is connected with one side of the guide slide block 2022, and two ends of the detection rod 101 are respectively connected with the first connecting plate 2014 and the second connecting plate 2024.
As shown in fig. 1 and 4, the present invention further provides an LED display, which includes a brightness adjustment detection structure, a bottom case 10, a liquid crystal module 11, and a controller 12, wherein the liquid crystal module 11 includes an LED backlight assembly 1101 and a screen assembly 1102 mounted on an inner wall of the bottom case 10, the LED backlight assembly 1101 includes a plurality of LED backlight plates 11011, a plurality of LED backlight lamps 11012 are mounted on the LED backlight plates 11011, the LED backlight lamps 11012 are connected with the controller 12, the screen assembly 1102 includes a polarizer one, a TFT plate, a liquid crystal, a C/F glass, and a polarizer two, the polarizer one, the TFT plate, the liquid crystal, the C/F glass, and the polarizer two are sequentially stacked on one side of the LED backlight assembly 1101, the brightness adjustment detection structure is mounted inside the bottom case 10 and located on an upper side of the LED backlight assembly 1101, and the controller 12 is connected with the processing module 3.
The illumination intensity sensor 102 corresponds to the position of the LED backlight 11012, and the distance sensor 4 is mounted on one end of the guide slide bar 2021, for detecting the moving position of the guide slide block 2022.
The fixed distance method and the constant illuminance method mentioned herein are methods generally used for detecting the illumination intensity.
The principle of the fixed distance method is as follows: first measuring photocurrent of standard LED lamp at distance r
Figure SMS_16
Then detecting the photocurrent of the LED lamp to be detected at the same position>
Figure SMS_17
The light intensity of the LED lamp to be tested is +.>
Figure SMS_18
Wherein->
Figure SMS_19
For the illumination intensity of standard lamps, +.>
Figure SMS_20
As can be seen from the above equation, the illumination intensity is proportional to the intensity of the photocurrent. />
The principle of the constant illuminance method is as follows: first, the distance is measured as
Figure SMS_21
Photocurrent of a standard LED lamp at +.>
Figure SMS_22
The method comprises the steps of carrying out a first treatment on the surface of the Then moving the LED lamp to be tested until the photocurrent is +.>
Figure SMS_23
When the LED lamp to be measured is at a certain distance from the detector, the distance of the LED lamp to be measured from the detector is measured>
Figure SMS_24
，
Then
Figure SMS_25
Wherein->
Figure SMS_26
For the illumination intensity of standard lamps, +.>
Figure SMS_27
Is the light intensity of the lamp to be measured.
From the above equation, it can be seen that the illumination intensity is proportional to the square of the distance.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A brightness adjustment detection structure, characterized by comprising: the detection assembly (1) is used for detecting illumination intensity, and the detection assembly (1) comprises a detection rod (101) with a hollow structure, an ultrasonic ranging module I (103) arranged at the lower part of the detection rod (101) and a plurality of illumination intensity sensors (102);
the moving assembly (2) is used for driving the detecting assembly (1) to move linearly, the moving assembly (2) comprises a power assembly (201) and a guide assembly (202), and two ends of the detecting rod (101) are respectively connected with the power assembly (201) and the guide assembly (202);
the processing module (3) is used for processing the data transmitted by the detection assembly (1), and the processing module (3) is connected with the illumination intensity sensor (102) and the ultrasonic ranging module I (103);
a distance sensor (4) for detecting the position of the detection rod (101), the distance sensor (4) being arranged on one side of the guide assembly (202);
the ultrasonic distance measuring device is characterized by further comprising a plurality of auxiliary LED lamps (6) arranged on the upper portion of the detecting rod (101) and an ultrasonic distance measuring module II (5) arranged on one side of the upper portion of the detecting rod (101), wherein the ultrasonic distance measuring module II (5) is connected with the processing module (3), and the auxiliary LED lamps (6) are respectively connected with the controller (12).
2. A brightness adjustment detection structure according to claim 1, characterized in that: the processing module (3) comprises a single chip microcomputer module and an external storage module, and the single chip microcomputer module is connected with the external storage module.
3. A brightness adjustment detection structure according to claim 1, characterized in that: the power assembly (201) comprises a mobile motor (2011), a screw rod (2012) connected with an output shaft of the mobile motor (2011), a mobile block (2013) in threaded connection with the outer surface of the screw rod (2012), a first connecting plate (2014) and a support bearing (2015), wherein the first connecting plate (2014) is sleeved outside the screw rod (2012), one end, far away from the mobile motor (2011), of the screw rod (2012) is connected with the inner part of the support bearing (2015), and one side of the first connecting plate (2014) is connected with one side of the mobile block (2013).
4. A brightness adjustment detection structure according to claim 3, characterized in that: the guide assembly (202) comprises a guide slide bar (2021), a guide slide block (2022) arranged outside the guide slide bar (2021) in a sliding manner, a limiting piece (2023) arranged on one side of the guide slide bar (2021) and a second connecting plate (2024) sleeved on the guide slide bar (2021), the second connecting plate (2024) is connected with one side of the guide slide block (2022), and two ends of the detection rod (101) are respectively connected with the first connecting plate (2014) and the second connecting plate (2024).
5. An LED display comprising a brightness adjustment detection structure according to claim 4, characterized in that: still include drain pan (10), liquid crystal module (11) and controller (12), liquid crystal module (11) are including setting up LED backlight unit (1101) and screen subassembly (1102) at drain pan (10) inner wall, LED backlight unit (1101) are including a plurality of LED backlight unit (11011), be provided with a plurality of LED backlight (11012) on LED backlight unit (11011), LED backlight (11012) are connected with controller (12), screen subassembly (1102) include polaroid one, TFT board, liquid crystal, C/F glass and polaroid two, polaroid one, TFT board, liquid crystal, C/F glass and polaroid two pile up the setting in proper order in one side of LED backlight unit (1101), brightness adjustment detects the structure setting inside drain pan (10), and is located the upside of LED backlight unit (1101), controller (12) are connected with processing module (3), illumination intensity sensor (102) correspond with LED backlight (11012) position orientation.
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CN114999407A (en) * 2022-06-06 2022-09-02 深圳市善之能科技有限公司 Method and system for accurately controlling backlight brightness of airborne display
CN114999410A (en) * 2022-06-29 2022-09-02 京东方科技集团股份有限公司 Device and method for corresponding light control address and backlight area

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