CN111489686B - Display screen thermal effect compensation adjustment display device, method and system - Google Patents
Display screen thermal effect compensation adjustment display device, method and system Download PDFInfo
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- CN111489686B CN111489686B CN202010240809.7A CN202010240809A CN111489686B CN 111489686 B CN111489686 B CN 111489686B CN 202010240809 A CN202010240809 A CN 202010240809A CN 111489686 B CN111489686 B CN 111489686B
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- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The invention relates to a display screen thermal effect compensation adjustment display device, a method and a system thereof, wherein the display screen thermal effect compensation adjustment display method comprises the steps of obtaining the relative position of a structural temperature mark of a detection point of an LED display screen and the heat conduction adjustment coefficient of the detection point of the relative position in real time; obtaining red, green and blue brightness values of the LED lamp point at different structure temperatures, and obtaining a conversion formula of an LED chromaticity compensation coefficient and the structure temperature; converting the position structure temperature of each LED lamp point; obtaining an LED chromaticity compensation coefficient of the LED lamp point; the chrominance values are obtained for adjusting the display. The invention can realize real-time and dynamic heat effect compensation of the LED display screen, and solves the technical problem that the fixed coefficient can not dynamically adapt to the change, thereby greatly improving the display precision and the display effect of the LED display screen and saving electric energy.
Description
Technical Field
The invention belongs to the technical field of display control of display screens, and particularly relates to a display device, a display method, a display system and electronic equipment for thermal efficiency compensation and adjustment of a display screen.
Background
When the LED display screen is applied to different occasions, the LED display screen is installed at a position, the power supply installation position of the display module, a display picture, the brightness of the display screen, LED lamp beads and display chips of different types are used, the product is designed to be heat-dissipating, the on-site environmental temperature and other factors are influenced, the temperature of the box body structure rises, especially when the local structure temperature of the display chips and the power supply module rises, the display effect of the LED lamp beads in a temperature rising area can be influenced, the display brightness of the area can be reduced, the screen picture is caused to have color spots, color blocks and other phenomena, and the screen display effect is influenced. The following two solutions are currently in common use: the method comprises the steps of improving the physical structure of the display module, the layout of heating components of the lamp panel and increasing heat dissipation holes or heat dissipation equipment, and avoiding the phenomenon of heat effect by improving the heat dissipation efficiency of the display screen; secondly, a temperature detection device is added on the display module, the display brightness of the display module LED is reduced when the temperature detection device exceeds a temperature limit value, and the influence of the heat effect is reduced by reducing the power consumption of the module; however, there is a limitation in improving the physical structure of the display module, the arrangement of the heating components of the lamp panel, or increasing the heat dissipation device: firstly, the display IC or the power supply which has serious heat generation is difficult to uniformly conduct the heat to the whole display module, and the influence of local heat effect still exists; secondly, additional space for installing heat dissipation equipment is needed, and the installation size of the display screen is influenced; in the prior art, whether brightness compensation is carried out or not is judged by using a unique temperature limit value, so that the brightness difference of the whole display screen is displayed according to a module, when the screen temperature is higher, the heat effect influence area is enlarged, the area of the display module needing compensation is dynamically enlarged, the fixed coefficient cannot dynamically adapt to the change, and the display effect is still influenced.
Disclosure of Invention
The present invention is directed to a display device, method, system and electronic device for adjusting thermal compensation of a display panel, so as to solve the above technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides a display device for compensating and adjusting thermal effect of a display screen, where the display device includes a temperature sensing module, a chrominance compensation module, a data sampling module, and an operation module;
the temperature sensing module is used for sensing the structural temperature unit of the detection point;
the chromaticity compensation module is used for converting the structural temperature of the lamp point position according to the structural temperature and the heat conduction adjustment coefficient of each detection point and the distance between each lamp point and each detection point, receiving the operation result to obtain the chromaticity compensation coefficient of each lamp, setting the chromaticity compensation coefficient of each lamp on each lamp, and multiplying the chromaticity compensation coefficient of each lamp by the chromaticity coefficient corrected by the screen to obtain the chromaticity value finally used for display;
the data sampling module is used for reading all the temperature sensing devices at regular time to obtain the structural temperature data of the detection points of the display unit; also to obtain LED input electrical power; LED effective optical power; measuring the true thermal resistance from the point to the periphery;
the operation module is configured to support the scaling, the formula operation, and the calculation of the multiplication of the chromaticity compensation coefficient of each lamp and the chromaticity coefficient of the screen correction by the chromaticity compensation module.
Preferably, the display screen thermal effect compensation adjustment display device further comprises:
the thermal simulation module is used for establishing a transient thermal analysis model when the display module works according to the PCB design, the electronic element performance and the hardware structure of the LED display module, and obtaining a plurality of high-temperature positions possibly existing when the display module operates according to a simulation result;
the judging module is used for judging whether the temperature exceeds a safety threshold value; issuing an alarm if a threshold is exceeded;
the setting module is used for setting a temperature safety threshold;
the transceiver module is used for transmitting data information.
Preferably, the display screen is composed of one or more display units; each display unit is provided with a thermal effect compensation adjusting device;
the display unit includes: the display device comprises a power supply module, a display unit structural part, a display driving module and a mask;
the power supply module is used for controlling a power supply;
the display unit structural part comprises a PCB (printed Circuit Board), a power supply module and a thermal effect compensation adjusting device are fixed on one side, and a display driving module is fixed on the other side;
one side of the display driving module comprises a driving chip and a display control module, and the other side of the display driving module is welded with an LED lamp bead;
the face guard covers on the display driving module and is used for preventing water, dust, direct light and glare and the like.
In a second aspect, an embodiment of the present application provides a display method for adjusting and compensating thermal effects of a display screen, where the display method for adjusting and compensating thermal effects of a display screen includes:
step 1, obtaining the structural temperature of a detection point of an LED display screen in real time;
step 2, marking the relative positions of the detection points on a display unit on a program, and the heat conduction regulating coefficient of each detection point marked with the relative position;
step 3, obtaining the red, green and blue brightness values of the LED lamp point at different structure temperatures, thereby obtaining the conversion formula of the LED chromaticity compensation coefficient and the structure temperature;
step 4, converting the position structure temperature of each LED lamp point according to the structure temperature of each detection point, the heat conduction adjusting coefficient of the detection point and the distance between each LED lamp point and the detection point;
step 5, obtaining the LED chromaticity compensation coefficient of the LED lamp point by using the conversion formula;
and 6, configuring the obtained chromaticity compensation coefficient of the LED lamp point to each LED lamp point, and multiplying the chromaticity compensation coefficient by the LED chromaticity compensation coefficient corrected by the screen to obtain a chromaticity value, wherein the chromaticity value is used for adjusting and displaying.
Preferably, the step 1 of obtaining the structural temperature of the detection point of the LED display screen in real time further includes:
and obtaining all high-temperature positions of the LED display module during operation through thermal simulation.
Preferably, the conversion formula of the LED chromaticity compensation coefficient and the structure temperature is:
Tj＝Ts+(Ps-PL)Rreal
Tj: the structural temperature of the LED in a stable state;
Ts: detecting a temperature for a temperature sensor;
Ps: inputting electric power for the LED;
PL: is the LED effective optical power;
Rreal: true thermal resistance from the measurement point to the periphery;
preferably, the formula for converting the structural temperature of the position of each LED lamp point is:
in the formula, the total number of the measuring points is N, and the coordinate of the Mth measuring point is (x)m,ym)
T(xm,ym): a temperature value representing the mth point;
dm: representing the distance between the interpolation point and the measurement point;
c: as interpolation weight factors, interpolating influence radius;
γ: the empirical value is 0.3 for the weighting factor;
the formula is as follows:
is the primary interpolation result;
the formula is as follows:
the result of the second interpolation is calculated on the result of the first difference.
Preferably, the method of obtaining the weighting factor of a detected point temperature comprises:
step 1, arranging a temperature sensing chip beside a heating device of an LED display unit;
step 2, according to the step temperature, raising the ambient temperature;
step 3, obtaining the temperature of the temperature sensing chip of each detection point under different environmental temperatures;
step 4, obtaining the structural temperature of the detection points according to the formula for converting the position structural temperature of each LED lamp point;
step 5, calculating the structural temperature of any point by adopting the quadratic interpolation algorithm according to the weighting factor gamma;
step 6, comparing the temperature with the simulated or collected structure temperature of the point to judge whether the temperature is within an error range; if yes, go to step 8; if not, go to step 7;
step 7, adjusting the weighting factor gamma, and performing step 5;
step 8, if yes, obtaining a structure temperature weighting factor gamma of the arbitrary point;
and 9, repeatedly calculating other positions until the calculation is finished.
In a third aspect, an embodiment of the present application further provides a display system for compensating and adjusting thermal efficiency of a display screen, where the display system for compensating and adjusting thermal efficiency of a display screen includes: the display device for thermal effect compensation adjustment of the display screen according to any one of the embodiments of the present invention, or the display method for thermal effect compensation adjustment of the display screen according to any one of the embodiments of the present invention.
In a fourth aspect, embodiments of the present application further provide an electronic device comprising a processor and a machine-readable storage medium storing machine-executable instructions executable by the processor, the processor-executable instructions, when invoked and executed by the processor, causing the processor to: the display method for the thermal effect compensation adjustment of the display screen is realized.
Therefore, the existing scheme fixes the compensation area and parameters, and the screen display effect cannot be uniformly improved due to temperature reduction or ultrahigh temperature. The prior art does not compensate in real time according to temperature changes, but compensates according to a fixed area. In the scheme provided by the embodiment of the application, compared with the prior art, the invention has the following beneficial effects: the invention can realize real-time and dynamic heat effect compensation of the LED display screen, and solves the technical problem that the fixed coefficient can not dynamically adapt to the change, thereby greatly improving the display precision and the display effect of the LED display screen and saving electric energy.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Drawings
FIG. 1 is a schematic view of a display device with thermal compensation adjustment according to an embodiment of the present invention;
FIG. 2 is a schematic view of a display panel thermal compensation adjustment display device according to another embodiment of the present application;
FIG. 3 is a front view and a back view of an application scenario of a thermal simulation module of an LED display screen according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a display panel with a thermal compensation adjustment device according to another embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for adjusting a display of a display panel according to an embodiment of the present invention;
FIG. 6 is a graph of LED light output versus structural temperature for LED display screen light in accordance with an embodiment of the present application;
FIG. 7 is a thermal model diagram of the heat source position and the measurement position of an LED display module according to an embodiment of the present invention;
FIG. 8 is a diagram of collected discrete point locations in accordance with an embodiment of the present invention;
fig. 9 is a flowchart of a method for obtaining the weighting factor of the detected point temperature according to an embodiment of the present invention.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, fig. 1 is a schematic view of a display panel thermal efficiency compensation adjustment display device according to an embodiment of the present invention; the display screen thermal effect compensation adjustment display device 10 comprises: the device comprises a temperature sensing module 12, a chromaticity compensation module 14, a data sampling module 16 and an operation module 18;
the temperature sensing module 12 is used for detecting a structural temperature unit of a detection point;
the chromaticity compensation module 14 is configured to convert the structural temperature of the lamp point position according to the structural temperature and the thermal conduction adjustment coefficient of each detection point and the distance between each lamp point and the detection point, receive the operation result to obtain a chromaticity compensation coefficient of each lamp, set the chromaticity compensation coefficient of each lamp on each lamp, and multiply the chromaticity compensation coefficient with the chromaticity coefficient corrected by the screen to obtain a chromaticity value finally used for display;
the data sampling module 16 is used for reading all the temperature sensing devices at regular time to obtain the structural temperature data of the detection points of the display unit; also to obtain LED input electrical power; LED effective optical power; measuring the true thermal resistance from the point to the periphery;
the operation module 18 is configured to support the scaling of the chromaticity compensation module, the formula operation, and the calculation of the multiplication of the chromaticity compensation coefficient of each lamp and the chromaticity coefficient of the screen correction.
Referring to fig. 2, fig. 2 is a schematic view of a display panel thermal compensation adjustment display device according to another embodiment of the present application; the display screen thermal effect compensation adjustment display device 10 comprises: the device comprises a temperature sensing module 12, a chromaticity compensation module 14, a data sampling module 16 and an operation module 18; the specific functions of the modules are the same as those of the embodiment corresponding to the figure 1; display screen thermal effect compensation adjusts display device still includes:
the thermal simulation module 20 is used for establishing a transient thermal analysis model of the display module during working according to the PCB design, the electronic element performance and the hardware structure of the LED display module, and obtaining a plurality of high-temperature positions possibly existing during the operation of the display module according to a simulation result; for example, the positions are P0, P1, … Pn;
a judging module 22 for judging whether the temperature exceeds a safety threshold; issuing an alarm if a threshold is exceeded;
a setting module 24 for setting a temperature safety threshold;
the transceiver module 26 is used for transmitting data information.
Referring to fig. 3, fig. 3 is a front view and a back view of an application scenario of a thermal simulation module of an LED display screen according to another embodiment of the present invention; the thermal simulation module of the LED display screen comprises: the display module comprises a display module front LED lamp and face shield 200, a display module 202, a structural frame on the back of the display module, LED lamp bead high-temperature region temperature 204 and LED drive chip high-temperature region temperature 206.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a display panel mounted with a display panel thermal effect compensation adjustment display device according to another embodiment of the present application; the display screen 30 is composed of one or more display units 32; each display unit 32 is provided with a display screen thermal effect compensation adjusting device 102;
the display unit includes: the display device comprises a power supply module 100, a display screen thermal efficiency compensation adjusting device 102, a display unit structural member 104, a display driving module 106, LED lamp beads 108 and a mask 110;
the power module 100 is used for controlling a power supply;
the display unit structure 104 includes a PCB board, a power module 100 and a display panel thermal effect compensation and adjustment device 102 (the display panel thermal effect compensation and adjustment device is the same as that in fig. 2) are fixed on one side, and a display driving module 106 is fixed on the other side;
one side of the display driving module 106 comprises a driving chip and a display control module, and the other side of the display driving module is welded with an LED lamp bead 108;
the LED lamp beads 108 are welded on the display driving module 106;
the mask 110 covers the display driving module 106 and the LED lamp beads 108, and is used for preventing water, dust, direct light, glare and the like.
FIG. 5 is a flowchart illustrating a method for adjusting a display of a display panel according to an embodiment of the present invention; the display screen thermal effect compensation adjustment display method comprises the following steps:
s400, obtaining the structural temperature of a detection point of the LED display screen in real time;
s402, marking the relative positions of the detection points on a display unit on a program, and the heat conduction regulating coefficient of each detection point marked with the relative position; specifically, the relative position of a detection point on a display unit and a heat conduction regulation coefficient are obtained;
s404, obtaining the red, green and blue brightness values of the LED lamp point at different structure temperatures, thereby obtaining a conversion formula of the LED chromaticity compensation coefficient and the structure temperature;
s406, converting the position structure temperature of each LED lamp point according to the structure temperature of each detection point, the heat conduction regulation coefficient of the detection point and the distance between each LED lamp point and the detection point; specifically, the heat conduction adjustment coefficient of the detection point is used for calculating the thermal resistance value Rreal of the detection point;
s408, obtaining an LED chromaticity compensation coefficient of the LED lamp point by using the conversion formula;
s410, configuring the obtained chromaticity compensation coefficient of the LED lamp points to each LED lamp point, and multiplying the chromaticity compensation coefficient by the LED chromaticity compensation coefficient corrected by the screen to obtain a chromaticity value, wherein the chromaticity value is used for adjusting display.
Specifically, a temperature sensing probe is deployed at a high-temperature position of the LED display module or an IC (integrated circuit) which is integrated on the lamp panel and can feed back the temperature of a chip is used for obtaining real-time structure temperatures T0, T1,. Tn at a detection point position; programmatically marking the relative positions of the detection points on the display module, L0, L1,. Ln, and the thermal conductivity adjustment coefficients of each point, F0, F1,. Fn; obtaining red, green and blue brightness values of the LED lamp at different structure temperatures through data sampling, thereby obtaining a conversion formula F of an LED chromaticity compensation coefficient and the structure temperature; when the screen displays, the temperature detection module acquires the structural temperature of each detection point in real time; converting the structure temperature of the lamp point position according to the structure temperature and the heat conduction regulating coefficient of each detection point and the distances D0, D1,. Dn of each lamp point relative to the detection points; obtaining chromaticity compensation coefficients R0, R1,. Rn of each lamp by referring to a formula of the position structure temperature of the LED lamp points; and setting the chromaticity compensation coefficient of each lamp on each lamp, and multiplying the chromaticity compensation coefficient by the chromaticity coefficient corrected by the screen to obtain the chromaticity value finally used for display.
The conversion formula of the LED chromaticity compensation coefficient and the structure temperature is as follows:
Tj＝Ts+(Ps-PL)Rreal
Tj: the structural temperature of the LED in a stable state;
Ts: detecting a temperature for a temperature sensor;
Ps: inputting electric power for the LED;
PL: is the LED effective optical power;
Rreal: true thermal resistance from the measurement point to the periphery;
the formula is used for carrying out conversion of the LED chromaticity compensation coefficient and the structure temperature through the sampling temperature of the temperature acquisition chip.
The formula for converting the position structure temperature of each LED lamp point is as follows:
in the formula, the total number of the measuring points is N, and the coordinate of the Mth measuring point is (x)m,ym)
T(xm,ym): a temperature value representing the mth point;
dm: representing the distance between the interpolation point and the measurement point;
c: as interpolation weight factors, interpolating influence radius;
γ: the empirical value is 0.3 for the weighting factor;
the formula is as follows:
is the primary interpolation result;
the formula is as follows:
the result of the second interpolation is calculated on the result of the first difference.
The formula is to apply a secondary interpolation method, and the structural temperature of the position of any LED lamp point in the display screen can be calculated.
Please refer to fig. 9 for the method of obtaining the weighting factor of the detected point temperature.
In another embodiment, the S400 obtains the structural temperature of the detection point of the LED display screen in real time, and before obtaining, may further include:
and obtaining all high-temperature positions of the LED display module during operation through thermal simulation.
Specifically, before the above embodiments, several high temperature positions P0, P1,. Pn when the LED display module operates may also be obtained through thermal simulation, and may be areas where the driving ICs or the power supply are located.
Referring to fig. 6, fig. 6 is a graph showing a relationship between LED light output and structure temperature of LED display screen light according to an embodiment of the present invention; in the figure, the horizontal axis represents the structure temperature 400 of the LED, unit: DEG C; the vertical axis represents the LED relative light output 402 in: % calculated as 100% light output at a structural temperature of 25 ℃ and a constant current of 20 mA. From the graph, as the temperature of the structure rises, the brightness output of the LED is reduced, the red is reduced most, the green is second and the blue is least; in this figure, the blue light output curve 404; white light output curve 406; green light output curve 408; red light output curve 410.
Referring to fig. 7, fig. 7 is a thermal model diagram of a heat source position and a measurement position of an LED display module according to an embodiment of the present invention; the figure includes a display driving module 500; a heat source 502 including a driver IC, a power supply module, and the like; the heat diffusion range 504 of the heat source, which represents expansion as the temperature of the heat source increases; it can be seen that the heat diffusion range 504 of the heat source is greater than the heat diffusion range 504' of the heat source is greater than the heat diffusion range 504 "of the heat source. Specifically, as the temperature of the heat source increases, the heat source radiation range gradually expands.
Referring to fig. 8, fig. 8 is a diagram of a position of a collecting detection point according to an embodiment of the present invention;
in this figure, the heat source position 600;
the detection point positions 602 are collected, arranged according to the temperature gradient change density in the X and Y directions, and selected more at the dense position and less at the gentle position.
Referring to fig. 9, fig. 9 is a flowchart illustrating a method for obtaining the weighting factor of the detected spot temperature according to an embodiment of the present invention;
the method for acquiring the weighting factor of the detected point temperature comprises the following steps:
s900, arranging a temperature sensing chip beside a heating device of the LED display unit;
s902, increasing the ambient temperature according to the step temperature;
s904, obtaining the temperature of the temperature sensing chip of each detection point at different environmental temperatures; for example, Tc0, Tc1,. TcN;
s906, obtaining the structural temperature of the detection points according to the formula for converting the position structural temperature of each LED lamp point; TSN, for example TS0, TS1,. TSN;
s908, calculating the structural temperature of any point by adopting the quadratic interpolation algorithm according to the weighting factor gamma; for example, Tg;
s910, comparing the temperature with the simulated or collected structure temperature of the point to judge whether the temperature is within an error range; if yes, go to step S914; if not, go to step S912;
s912, adjusting the weighting factor gamma, and executing the step S908;
s914, if yes, obtaining the structure temperature weighting factor gamma of the arbitrary point;
and S916, repeatedly calculating other positions until the end.
The embodiment of the invention also provides a display screen thermal effect compensation adjustment display system diagram; the display screen thermal effect compensation adjustment display system comprises: the invention relates to a display screen thermal effect compensation adjustment display device or a display screen thermal effect compensation adjustment display method in any embodiment.
Embodiments of the present application further provide an electronic device comprising a processor and a machine-readable storage medium storing machine-executable instructions executable by the processor, the processor-executable instructions, when invoked and executed by the processor, causing the processor to: the display screen thermal effect compensation adjustment display method is achieved.
An embodiment of the present invention further provides a storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the display method for adjusting thermal compensation of a display panel according to any of the above embodiments.
The system/computer device integrated components/modules/units, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the above embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium and used by a processor to implement the steps of the above method embodiments. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
In the several embodiments provided in the present invention, it should be understood that the disclosed system and method may be implemented in other ways. For example, the system embodiments described above are merely illustrative, and for example, the division of the components is only one logical division, and other divisions may be realized in practice.
In addition, each functional module/component in each embodiment of the present invention may be integrated into the same processing module/component, or each module/component may exist alone physically, or two or more modules/components may be integrated into the same module/component. The integrated modules/components can be implemented in the form of hardware, or can be implemented in the form of hardware plus software functional modules/components.
It will be evident to those skilled in the art that the embodiments of the present invention are not limited to the details of the foregoing illustrative embodiments, and that the embodiments of the present invention are capable of being embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the embodiments being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units, modules or means recited in the system, apparatus or terminal claims may also be implemented by one and the same unit, module or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The utility model provides a display screen thermal effect compensation adjusts display device which characterized in that, display screen thermal effect compensation adjusts display device, includes: the device comprises a temperature sensing module, a chromaticity compensation module, a data sampling module and an operation module;
the temperature sensing module is used for sensing the structural temperature of the detection point;
the chromaticity compensation module is used for converting the structural temperature of the lamp point position according to the structural temperature and the heat conduction adjustment coefficient of each detection point and the distance between each lamp point and each detection point, receiving the operation result to obtain the chromaticity compensation coefficient of each lamp, setting the chromaticity compensation coefficient of each lamp on each lamp, and multiplying the chromaticity compensation coefficient of each lamp by the chromaticity coefficient corrected by the screen to obtain the chromaticity value finally used for display; the formula for converting the structure temperature of each lamp point is as follows:
in the formula, the total number of the measuring points is N, and the coordinate of the Mth measuring point is
；
c: as interpolation weight factors, interpolating influence radius;
the data sampling module is used for reading all the temperature sensing devices at regular time to obtain the structural temperature data of the detection points of the display unit; also to obtain LED input electrical power; LED effective optical power; measuring the true thermal resistance from the point to the periphery;
the operation module is configured to support the scaling, the formula operation, and the calculation of the multiplication of the chromaticity compensation coefficient of each lamp and the chromaticity coefficient of the screen correction by the chromaticity compensation module.
2. The display device of claim 1, wherein the display device further comprises:
the thermal simulation module is used for establishing a transient thermal analysis model when the display module works according to the PCB design, the electronic element performance and the hardware structure of the LED display module, and obtaining a plurality of high-temperature positions possibly existing when the display module operates according to a simulation result;
the judging module is used for judging whether the temperature exceeds a safety threshold value; issuing an alarm if a threshold is exceeded;
the setting module is used for setting a temperature safety threshold;
the transceiver module is used for transmitting data information.
3. The display screen thermal effect compensation adjustment display device of claim 1, wherein the display screen thermal effect compensation adjustment display device is located in a display unit; the display unit is provided with a thermal effect compensation adjusting device;
the display unit further includes: the display device comprises a power supply module, a display unit structural part, a display driving module and a mask;
the power supply module is used for controlling a power supply;
the display unit structural part comprises a PCB (printed Circuit Board), a power supply module and a thermal effect compensation adjusting device are fixed on one side, and a display driving module is fixed on the other side;
one side of the display driving module comprises a driving chip and a display control module, and the other side of the display driving module is welded with an LED lamp bead;
the mask covers the display driving module.
4. A display method for thermal effect compensation adjustment of a display screen is characterized by comprising the following steps:
obtaining the structural temperature of a detection point of the LED display screen in real time;
marking the relative position of the detection points on a display unit on a program, and the heat conduction adjusting coefficient of each detection point marked with the relative position;
obtaining red, green and blue brightness values of the LED lamp point at different structure temperatures, thereby obtaining a conversion formula of an LED chromaticity compensation coefficient and the structure temperature;
converting the position structure temperature of each LED lamp point according to the structure temperature of each detection point, the heat conduction regulating coefficient of the detection point and the distance between each LED lamp point and the detection point; the formula for converting the position structure temperature of each LED lamp point is as follows:
in the formula, the total number of the measuring points is N, and the coordinate of the Mth measuring point is
；
c: as interpolation weight factors, interpolating influence radius;
obtaining an LED chromaticity compensation coefficient of the LED lamp point by using the conversion formula;
and configuring the obtained chromaticity compensation coefficient of the LED lamp points to each LED lamp point, and multiplying the chromaticity compensation coefficient by the LED chromaticity compensation coefficient corrected by the screen to obtain a chromaticity value, wherein the chromaticity value is used for adjusting display.
5. The display screen thermal effect compensation adjustment display method of claim 4, wherein the obtaining of the structural temperature of the detection point of the LED display screen in real time further comprises:
and obtaining all high-temperature positions of the LED display module during operation through thermal simulation.
6. The display method for adjusting and displaying thermal effect compensation of display screen according to claim 4, wherein the conversion formula of the LED chromaticity compensation coefficient and the structure temperature is:
Tj: the structural temperature of the LED in a stable state;
Ts: detecting a temperature for a temperature sensor;
Ps: inputting electric power for the LED;
PL: is the LED effective optical power;
Rreal: the true thermal resistance from the measurement point to the periphery.
7. The display screen thermal effect compensation adjustment display method according to claim 4, wherein the method for obtaining the weighting factor of the structural temperature of the detection point comprises:
step 1, arranging a temperature sensing chip beside a heating device of an LED display unit;
step 2, according to the step temperature, raising the ambient temperature;
step 3, obtaining the temperature of the temperature sensing chip of each detection point under different environmental temperatures;
step 4, obtaining the structural temperature of the detection points according to the formula for converting the position structural temperature of each LED lamp point;
step 5, calculating the structural temperature of any point by adopting the quadratic interpolation algorithm according to the weighting factor gamma;
step 6, comparing the temperature with the simulated or collected structure temperature of the point to judge whether the temperature is within an error range; if yes, go to step 8; if not, go to step 7;
step 7, adjusting the weighting factor gamma, and performing step 5;
step 8, if yes, obtaining a structure temperature weighting factor gamma of the arbitrary point;
and 9, repeatedly calculating other positions until the calculation is finished.
8. A display system is adjusted in compensation of display screen thermal effect, its characterized in that, display system is adjusted in compensation of display screen thermal effect includes: the display screen thermal effect compensation adjustment display method of any one of claims 4-7.
9. An electronic device comprising a processor and a machine-readable storage medium storing machine-executable instructions executable by the processor, the processor-executable instructions, when invoked and executed by the processor, causing the processor to: the display screen thermal effect compensation adjustment display method of any one of claims 4-7 is realized.
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| CN114299852A (en) * | 2021-12-15 | 2022-04-08 | 西安诺瓦星云科技股份有限公司 | Local adjusting method for LED display screen, storage medium and electronic equipment |
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