CN111489686A - 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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- CN111489686A CN111489686A CN202010240809.7A CN202010240809A CN111489686A CN 111489686 A CN111489686 A CN 111489686A CN 202010240809 A CN202010240809 A CN 202010240809A CN 111489686 A CN111489686 A CN 111489686A
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- 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
- G09G3/22—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]
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 detection points of a L ED display screen and the heat conduction adjustment coefficient of the detection points at the relative position in real time, obtaining the red, green and blue brightness values of L ED lamp points at different structural temperatures, obtaining a conversion formula of L ED chromaticity compensation coefficient and structural temperature, converting the position structural temperature of each L ED lamp point, obtaining the L ED chromaticity compensation coefficient of a L ED lamp point, obtaining chromaticity values for adjusting display, and achieving thermal effect compensation of the L ED display screen in real time and dynamically through the display screen thermal effect compensation method, so that the technical problem that the fixed coefficient cannot be dynamically adapted to change is solved, the display precision and the display effect of the L ED display screen are greatly improved, and electric energy is saved.
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
L ED display screen is applied in different occasions, influenced by a plurality of factors such as the installation position of the display screen, the power supply installation position of the display module, a display picture, the brightness of the display screen, the use of L ED lamp beads and display chips of different types, the heat dissipation design of the product, the field environmental temperature and the like, when the temperature of the box structure rises, especially when the temperature of local structures of the display chip and the power supply module rises, the display effect of the temperature rise region can be influenced, the display brightness of the area can be reduced, the phenomena of color spots, color blocks and the like of the screen picture can be caused, and the display effect of the screen is 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, and is also used for obtaining L ED input electric power, L ED effective optical power, true thermal resistance from the measurement points 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 of the display module during working according to the PCB design, the electronic element performance and the hardware structure of the L ED display module, and obtaining a plurality of high-temperature positions possibly existing during the operation of the display module 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 L ED lamp beads;
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 L ED 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 red, green and blue brightness values of L ED lamp points at different structure temperatures, thereby obtaining a conversion formula of L ED chromaticity compensation coefficients and structure temperatures;
step 4, converting the position structure temperature of each L ED lamp point according to the structure temperature of each detection point, the heat conduction regulation coefficient of the detection points and the distance between each L ED lamp point and the detection point position;
step 5, obtaining L ED chromaticity compensation coefficients of the L ED lamp points by using the conversion formula;
and 6, configuring the obtained L ED lamp point chromaticity compensation coefficient to each L ED lamp point, and multiplying the obtained L ED lamp point chromaticity compensation coefficient by the L ED chromaticity compensation coefficient corrected by the screen to obtain a chromaticity value, wherein the chromaticity value is used for adjusting display.
Preferably, the step 1 of obtaining L structure temperature of the detection point of the ED display screen in real time further includes:
all high temperature positions of the L ED display module during operation were obtained by thermal simulation.
Preferably, the conversion formula of the L ED chromaticity compensation coefficient and the structure temperature is:
Tj＝Ts+(Ps-PL)Rreal
Tjl ED structural temperature at steady state;
Ts: detecting a temperature for a temperature sensor;
Psl ED input electric power;
PLl ED 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 L ED 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.
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 L ED 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 L ED 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.
Compared with the prior art, the scheme provided by the embodiment of the application has the advantages that the thermal effect compensation of the L ED display screen can be realized in real time and dynamically, the technical problem that the fixed coefficient cannot be dynamically adapted to change is solved, the display precision and the display effect of the L ED display screen are greatly improved, and electric energy is saved.
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 L ED display screen according to yet another embodiment of the present application;
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 L ED light output versus structural temperature for L ED display screen light in accordance with one embodiment of the present invention;
FIG. 7 is a thermal model of the heat source position and the measurement position of an L ED 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, and is also used for obtaining L ED input electric power, L ED effective optical power, true thermal resistance from the measurement points 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 operation according to the PCB design, the electronic element performance and the hardware structure of the L ED display module, and obtaining a plurality of high-temperature positions which may exist during the operation of the display module according to a simulation result, wherein the positions are P0, P1 and … 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 scene of a thermal simulation module of an L ED display screen according to another embodiment of the present invention, where the thermal simulation module of the L ED display screen includes a front L ED lamp and a face mask 200 of the display module, a structural frame and a display module 202 at the back of the display module, a L ED lamp bead high temperature area temperature 204, and a L ED driver chip high temperature area 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 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, L ED lamp beads 108 and a face 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 L ED lamp beads 108;
l ED lamp bead 108 welded on the display driving module 106;
the face shield 110 covers the display driving modules 106 and L ED lamp beads 108, and is used for preventing water, dust, direct light and 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 an L ED 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 L ED lamp points at different structure temperatures, thereby obtaining a conversion formula of L ED chromaticity compensation coefficients and structure temperatures;
s406, converting the position structure temperature of each L ED 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 L ED lamp point and the detection point position, wherein the heat conduction regulating coefficient of the detection point is used for calculating the thermal resistance value Rreal of the detection point;
s408, obtaining a L ED chromaticity compensation coefficient of the L ED lamp point by using the conversion formula;
and S410, configuring the obtained chromaticity compensation coefficient of the L ED lamp point to each L ED lamp point, and multiplying the chromaticity compensation coefficient by the L ED 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 arranged at a high-temperature position of a L ED display module or an IC (integrated circuit) capable of feeding back chip temperature is integrated on a lamp panel to obtain real-time structure temperatures T0, T1 and.. Tn of a detection point position, relative positions L, L and.. L n of the detection point on the display module and heat conduction adjusting coefficients F0, F1 and.. Fn of each point are marked on a program, red, green and blue brightness values of L ED lamps at different structure temperatures are obtained through data sampling to obtain a conversion formula F of L ED chromaticity compensation coefficients and structure temperatures, the temperature detection module obtains the structure temperature of each detection point in real time during screen display, the lamp point position structure temperature is calculated according to the structure temperature and the heat conduction adjusting coefficients of each detection point and the distances D0, D1, D.Dn of each lamp point relative to the detection point, the chromaticity compensation coefficients R0 and R84 of each lamp are obtained by referring to the formula of the position structure temperature of each detection point, and the chromaticity compensation coefficients R737 of each lamp are finally set to be used for correcting chromaticity of each lamp on a screen.
The conversion formula of the L ED chromaticity compensation coefficient and the structure temperature is as follows:
Tj＝Ts+(Ps-PL)Rreal
Tjl ED structural temperature at steady state;
Ts: detecting a temperature for a temperature sensor;
Psl ED input electric power;
PLl ED effective optical power;
Rreal: true thermal resistance from the measurement point to the periphery;
the formula is used for carrying out conversion of the L ED chromaticity compensation coefficient and the structure temperature through the sampling temperature of the temperature acquisition chip.
The formula for converting the structural temperature of the position of each L ED 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 that a quadratic interpolation method is applied, and the structure temperature of any L ED lamp point position 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 L a structural temperature of a detection point of the ED display screen in real time, and may further include:
all high temperature positions of the L ED display module during operation were obtained by thermal simulation.
Specifically, before the above embodiments, several high temperature positions P0, P1,. Pn when the ED display module operates may also be obtained L through thermal simulation, and may be regions where the driving ICs or the power supply are located.
Referring to fig. 6, fig. 6 is a graph showing a relationship between L ED light output and structure temperature of L ED display screen light according to an embodiment of the present invention, in which the horizontal axis shows a L ED structure temperature 400 in units of:c, and the vertical axis shows a L ED relative light output 402 in units of:%, and the light output is calculated as 100% at a constant current of 20mA at a structure temperature of 25 ℃.
Referring to fig. 7, fig. 7 is a thermal model diagram of a heat source position and a measurement position of an L ED display module according to an embodiment of the present invention, where the diagram includes a display driving module 500, a heat source 502 including a driving IC, a power module, etc., a heat diffusion range 504 of the heat source is enlarged as a temperature of the heat source increases, and it can be seen that the heat diffusion range 504 of the heat source is larger than the heat diffusion range 504' of the heat source and larger than the heat diffusion range 504 ″ of the heat source.
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 L ED 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 structure temperature of the detection points according to the formula for converting the position structure temperature of each L ED lamp point, such as 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 (10)
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 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, and is also used for obtaining L ED input electric power, L ED effective optical power, true thermal resistance from the measurement points 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 of the display module during working according to the PCB design, the electronic element performance and the hardware structure of the L ED display module, and obtaining a plurality of high-temperature positions possibly existing during the operation of the display module 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 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 L ED lamp beads;
the face guard covers on the display driving module and is used for preventing water, dust, direct light and glare and the like.
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 an L ED 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 L ED lamp points at different structure temperatures, thereby obtaining a conversion formula of L ED chromaticity compensation coefficients and structure temperatures;
converting the position structure temperature of each L ED lamp point according to the structure temperature of each detection point, the heat conduction regulation coefficient of the detection points and the distance between each L ED lamp point and the position of the detection point;
obtaining L ED chromaticity compensation coefficients of the L ED lamp points by using the conversion formula;
the obtained chromaticity compensation coefficient of the L ED lamp point is configured to each L ED lamp point and multiplied by the L ED chromaticity compensation coefficient corrected by the screen to obtain a chromaticity value, and the chromaticity value is used for adjusting display.
5. The method for displaying thermal effect compensation adjustment of display screen according to claim 4, wherein the step 1 of obtaining L ED structure temperature of the detection point of the display screen in real time further comprises the following steps:
all high temperature positions of the L ED display module during operation were obtained by thermal simulation.
6. The method for adjusting and displaying thermal effect compensation of display screen according to claim 4, wherein said L ED chromaticity compensation coefficient and structural temperature conversion formula is:
Tj＝Ts+(Ps-PL)Rreal
Tjl ED structural temperature at steady state;
Ts: detecting a temperature for a temperature sensor;
Psl ED input electric power;
PLl ED effective optical power;
Rreal: the true thermal resistance from the measurement point to the periphery.
7. The method as claimed in claim 4, wherein the formula for calculating the structural temperature of each L ED lamp point is as follows:
in the formula, measureThe total number of the 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.
8. The method for adjusting display screen thermal effect compensation according to claim 7, wherein the method for obtaining the weighting factor of the detected point temperature comprises:
step 1, arranging a temperature sensing chip beside a heating device of an L ED 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 L ED 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.
9. 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 panel thermal efficiency compensation adjustment display device of any one of claims 1 to 3 or the display panel thermal efficiency compensation adjustment display method of any one of claims 4 to 8.
10. 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 4-8 is realized.
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