CN114397778A - Display heating compensation method, device and system - Google Patents
Display heating compensation method, device and system Download PDFInfo
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- CN114397778A CN114397778A CN202111681360.9A CN202111681360A CN114397778A CN 114397778 A CN114397778 A CN 114397778A CN 202111681360 A CN202111681360 A CN 202111681360A CN 114397778 A CN114397778 A CN 114397778A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
Abstract
The invention discloses a method, a device and a system for heating compensation of a display, which are applied to the technical field of liquid crystal display; acquiring the ambient temperature acquired by the first temperature sensor; when the ambient temperature is lower than a preset temperature, acquiring the back plate temperature of the liquid crystal display, which is acquired by the second temperature sensor; determining the heating power of the heater according to the temperature of the back plate and the ambient temperature; the heater is controlled to work with heating power, so that the temperature of the back plate reaches a target temperature, wherein the target temperature is greater than or equal to the preset temperature, the problem of poor display effect of the liquid crystal display when the liquid crystal display is started at a low temperature is solved, and the display effect of the liquid crystal display in a low-temperature environment is improved.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a method, a device and a system for heating compensation of a display.
Background
The turn-on speed of a TFT-LCD (Thin film transistor liquid crystal display) is affected as the temperature decreases. At present, aiming at a low-temperature environment, the starting voltage of the TFT-LCD is generally increased through a temperature compensation resistor, so that the starting speed of the TFT-LCD is increased, and the TFT-LCD can normally work under the low-temperature environment. However, the range of the temperature compensation resistor adjustment is relatively small, the turn-on voltages of the TFT-LCD display at the temperatures below 0 ℃ are the same, and the display effect of the TFT-LCD display is seriously influenced.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a system for heating compensation of a display, and aims to solve the problem of poor display effect of a liquid crystal display when the liquid crystal display is started at a low temperature.
The embodiment of the invention provides a display heating compensation method which is applied to a display heating compensation device, wherein the display heating compensation device comprises a liquid crystal display, a heater, a first temperature sensor and a second temperature sensor, the first temperature sensor is arranged outside the liquid crystal display, and the heater and the second temperature sensor are arranged on a back plate of the liquid crystal display; the display heating compensation method comprises the following steps:
acquiring an ambient temperature acquired by the first temperature sensor;
when the ambient temperature is lower than a preset temperature, acquiring the back plate temperature of the liquid crystal display, which is acquired by the second temperature sensor;
determining the heating power of the heater according to the temperature of the back plate and the ambient temperature;
and controlling the heater to work at the heating power so that the temperature of the back plate reaches a target temperature, wherein the target temperature is greater than or equal to the preset temperature.
In one embodiment, the step of determining the heating power of the heater according to the temperature of the back plate and the ambient temperature comprises:
determining a temperature difference between the backplane temperature and the ambient temperature;
converting the temperature difference into working voltage variation based on a preset conversion mode;
and determining a duty ratio according to the working voltage variation, and adjusting the heating power of the heater by adopting the duty ratio.
In one embodiment, the step of controlling the heater to operate at the heating power includes:
obtaining a heat dissipation coefficient, a back plate area and a compensation coefficient of the liquid crystal display;
obtaining corrected heating power according to the heat dissipation coefficient, the area of the back plate, the compensation coefficient and the temperature difference value;
and controlling the heater to work at the corrected heating power.
In an embodiment, the step of obtaining the corrected heating power according to the heat dissipation coefficient, the back plate area, the compensation coefficient, and the temperature difference includes:
determining the product of the heat dissipation coefficient, the area of the back plate and the temperature difference;
determining a ratio of the product to the compensation factor;
and obtaining the corrected heating power according to the ratio.
In an embodiment, after the step of controlling the heater to operate at the heating power, the method further includes:
detecting whether the temperature of the back plate reaches a target temperature;
when the temperature of the back plate does not reach the target temperature, the step of controlling the heater to work at the heating power to enable the temperature of the back plate to reach the target temperature is executed in a return mode;
and stopping the operation of the heater when the temperature of the back plate reaches the target temperature.
In one embodiment, the display heating compensation device further comprises a humidity sensor, and the humidity sensor is disposed outside the liquid crystal display; the step of determining the heating power of the heater according to the temperature of the back plate and the ambient temperature further comprises:
acquiring the ambient humidity acquired by the humidity sensor;
determining a humidity difference value between the environment humidity and a preset humidity, and determining a first temperature compensation value according to the humidity difference value;
and determining the heating power of the heater according to the first temperature compensation value, the back plate temperature and the ambient temperature.
In one embodiment, the step of determining the heating power of the heater according to the temperature of the back plate and the ambient temperature comprises:
acquiring display content of a liquid crystal display;
determining a second temperature compensation value according to the display content, wherein the second temperature compensation value changes when the display content changes;
and determining the heating power of the heater according to the second temperature compensation value, the back plate temperature and the ambient temperature.
In addition, to achieve the above object, the present invention also provides a display heating compensation apparatus, including:
a liquid crystal display;
a first temperature sensor disposed outside the liquid crystal display;
the heater and the second temperature sensor are arranged on the back plate of the liquid crystal display;
the temperature acquisition circuit is connected with the first temperature sensor and the second temperature sensor and is used for acquiring the ambient temperature acquired by the first temperature sensor and acquiring the back plate temperature of the liquid crystal display acquired by the second temperature sensor;
the temperature comparison circuit is connected with the temperature acquisition circuit and is used for determining the heating power of the heater according to the temperature of the back plate and the ambient temperature;
and the temperature control circuit is respectively connected with the temperature comparison circuit and the temperature acquisition circuit.
In one embodiment, the heater includes a heating element and a conductive heating film.
In addition, to achieve the above object, the present invention also provides a display heating compensation system, including:
the acquisition module is used for acquiring the ambient temperature acquired by the first temperature sensor and acquiring the back plate temperature of the liquid crystal display acquired by the second temperature sensor when the ambient temperature is lower than a preset temperature;
the determining module is connected with the acquiring module and used for determining the heating power of the heater according to the temperature of the back plate and the ambient temperature;
and the control module is connected with the control module and used for controlling the heater to work at the heating power so that the temperature of the back plate reaches a target temperature.
The technical scheme of the heating compensation method, the device and the system for the display provided by the embodiment of the invention has the advantages that the first temperature sensor is arranged outside the liquid crystal display, a heater and a second temperature sensor are arranged on a back plate of the liquid crystal display, the ambient temperature collected by the first temperature sensor is acquired in real time and is compared with a preset temperature, acquiring the back plate temperature of the liquid crystal display collected by the second temperature sensor when the ambient temperature is less than a preset temperature, determining the heating power of the heater according to the back plate temperature and the ambient temperature, wherein, the display effect is not good due to the consistent starting voltage of the display under various temperatures of the low-temperature environment, therefore, when the temperature difference between the temperature of the back plate and the ambient temperature changes, the heating power also changes. And controlling the heater to work with the heating power until the temperature of the back plate reaches the target temperature, wherein the display effect of the liquid crystal display reaches the optimal technical scheme, so that the problem of poor display effect when the liquid crystal display is started at a low temperature is solved, and the display effect of the liquid crystal display in a low-temperature environment is improved.
Drawings
FIG. 1 is a schematic diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic view of the installation of the heater of the present invention;
FIG. 3 is a schematic diagram illustrating the operation variation of the LCD under different leakage currents and different operating voltages according to the present invention;
FIG. 4 is a schematic flow chart illustrating a first embodiment of a display heating compensation method according to the present invention;
FIG. 5 is a flowchart illustrating a detailed process of step S120 of the first embodiment of the display heating compensation method according to the present invention;
FIG. 6 is a schematic flowchart illustrating a first embodiment of a display heating compensation method according to the present invention after step S140;
FIG. 7 is a schematic diagram of a display heating compensation system according to the present invention;
the objects, features, and advantages of the present invention will be further explained with reference to the accompanying drawings, which are an illustration of one embodiment, and not an entirety of the invention.
Detailed Description
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a hardware operating environment according to an embodiment of the present invention.
It should be noted that fig. 1 is a schematic structural diagram of a hardware operating environment of the display heating compensation apparatus.
As shown in fig. 1, the display heating compensation apparatus 10 includes: a liquid crystal display 100; a heater 105 and a second temperature sensor 101 disposed on a rear panel of the liquid crystal display; a temperature acquisition circuit 102, a temperature comparison circuit 103 and a temperature control circuit 104; further comprising a first temperature sensor 200 disposed outside the liquid crystal display. Wherein the content of the first and second substances,
the input end of the temperature acquisition circuit 102 is connected with the output end of the second temperature sensor 101, and is used for acquiring the back plate temperature of the liquid crystal display acquired by the second temperature sensor. The temperature acquisition circuit 102 is further connected to an output end of the first temperature sensor 200, and is configured to acquire the ambient temperature acquired by the first temperature sensor 200;
the input end of the temperature comparison circuit 103 is connected with the output end of the temperature acquisition circuit 102, and is used for determining the heating power of the heater 105 according to the back plate temperature and the ambient temperature;
the input end of the temperature control circuit 104 is connected with the output end of the temperature comparison circuit 103, and the output end of the temperature control circuit 104 is connected with the input end of the heater 105, so as to control the heater to work with the heating power until the ambient temperature reaches the target temperature.
Optionally, the heater comprises a heating element and a conductive heating film, and the heating element and the conductive heating film form the heater. Referring to fig. 2, the heater is attached to a back plate of a liquid crystal display (liquid crystal cell) through an optical adhesive, so that the back plate of the liquid crystal display is uniformly heated.
Optionally, the display heating compensation apparatus may further include: a processor 1001, such as a CPU, a communication bus 1002, and a memory 1003. Wherein a communication bus 1002 is used to enable connective communication between these components. The memory 1003 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1003 may alternatively be a storage device separate from the processor 1001.
Optionally, the display heating compensation apparatus may further include: the user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface).
Those skilled in the art will appreciate that the display heating compensation device configuration shown in FIG. 1 is not intended to be limiting, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The first embodiment:
as shown in fig. 4, in a first embodiment of the present invention, a display heating compensation method of the present invention includes the steps of:
step S110, acquiring an ambient temperature collected by the first temperature sensor;
step S120, when the ambient temperature is lower than a preset temperature, acquiring the back plate temperature of the liquid crystal display, which is acquired by the second temperature sensor;
step S130, determining the heating power of the heater according to the backboard temperature and the environment temperature;
step S140, controlling the heater to work with the heating power, so that the ambient temperature reaches a target temperature, wherein the target temperature is greater than or equal to the preset temperature.
In this embodiment, when the temperature is very low, the working performance of the electronic device is affected, and the activity of the liquid crystal display is reduced, so that the turn-on speed of the liquid crystal display is affected. However, the adjustment range of the temperature compensation resistor is small, so that the turn-on voltage of the liquid crystal display is the same at all temperatures below 0 ℃, and the display effect of the liquid crystal display is poor. Therefore, the invention designs a display heating compensation method. The back plate of the liquid crystal display is provided with the heater and the second temperature sensor, the first temperature sensor is arranged outside the liquid crystal display, and the working temperature of the liquid crystal display can be maintained at a constant temperature under different environmental temperatures by controlling the heating mode of the heater. Therefore, the problem of poor display effect of the liquid crystal display during low-temperature starting is solved.
In this embodiment, the liquid crystal display is a TFT-LCD (Thin film transistor liquid crystal display). A heater and a second temperature sensor are arranged on the back plate of the liquid crystal display. Referring to fig. 2, the heater (i.e., the heater) is attached to a back plate (i.e., a liquid crystal cell) of the liquid crystal display by an optical adhesive. The heater may be used to heat a local portion of the liquid crystal cell, for example, a central portion of the liquid crystal cell. The heater can also heat the whole liquid crystal box, so that the whole liquid crystal box is uniformly heated. The heating power of the heater can be adjusted. Alternatively, the distance between the heater and the liquid crystal cell may be set according to actual conditions. The distance between the heater and the liquid crystal cell can be changed by adjusting the thickness of the optical cement. The closer the distance between the heater and the liquid crystal cell, the smaller the heating power. The further the distance between the heater and the liquid crystal cell, the greater the heating power.
In the present embodiment, the temperature sensor is disposed in the following two ways: firstly, a temperature sensor is arranged on a back plate of the liquid crystal display, and the temperature sensor is adopted to collect the ambient temperature. The environment temperature is the temperature of the environment where the liquid crystal display is located and is also the surface temperature of the liquid crystal display, and the surface temperature of the liquid crystal display changes along with the environment temperature in the heating process of the heater. Secondly, a first temperature sensor can be independently arranged outside the liquid crystal display to detect the ambient temperature, and a second temperature sensor is arranged on the liquid crystal display to detect the backboard temperature (namely the surface temperature) of the liquid crystal display, so that the measured backboard temperature is more accurate.
The present invention takes the second temperature sensor installation mode as an example.
Optionally, the preset temperature may be set according to an actual situation, for example, the preset temperature may be set according to parameters such as a performance parameter and a model of the liquid crystal display. Referring to fig. 3, when the preset temperature is set to 10 ℃, the display of the liquid crystal display is stable and the display effect is optimal, wherein an abscissa in fig. 3 represents the operating voltage of the NMOS transistor, and an ordinate represents the leakage current of the NMOS transistor. When the preset temperature is set to 100 ℃, the display effect of the liquid crystal display is the worst. Therefore, the preset temperature can be set to 10 ℃, so that the liquid crystal display achieves good display effect.
In this embodiment, when liquid crystal display starts work, obtain by the ambient temperature that first temperature sensor gathered compares the ambient temperature who gathers with preset temperature ambient temperature is less than when presetting the temperature, show that external ambient temperature is lower this moment, probably influences liquid crystal display's display effect. Therefore, when the ambient temperature is lower than the preset temperature, the back plate temperature of the liquid crystal display collected by the second temperature sensor is obtained, the heating power of the heater is determined according to the back plate temperature and the preset temperature, and the heat Q generated by the heater enables the back plate temperature of the liquid crystal display to be increased, so that the back plate temperature reaches the target temperature. Optionally, when the ambient temperature is equal to the preset temperature, no heater is required for heating.
Specifically, when the ambient temperature is lower than a preset temperature, the temperature of the back plate of the liquid crystal display collected by the second temperature sensor is obtained. And determining the heating power of the heater according to the temperature of the back plate and the ambient temperature. The duty ratio can be output through the temperature control circuit, the NMOS transistor is controlled through the bleeder resistor to drive the power resistor to generate heat, and meanwhile, the current flowing through the power resistor can flow into the conductive heating film to control the conductive heating film to generate heat so that the liquid crystal display panel is uniformly heated.
In the process, the temperature of the back plate of the liquid crystal display collected by the second temperature sensor is obtained in real time, the temperature of the back plate is compared with the ambient temperature, and the heating power of the heater is continuously changed according to the temperature difference value between the temperature of the back plate and the ambient temperature, so that the temperature of the back plate reaches the target temperature. Wherein the target temperature is greater than or equal to the preset temperature. Although the display effect of the liquid crystal display is theoretically optimal at a preset temperature, temperature compensation is required in order to maximize the actual display effect due to the problem of heat loss during the actual heating process. When the target temperature is greater than or equal to the preset temperature and the backboard temperature reaches the target temperature, the display effect of the liquid crystal display is better than that when the backboard temperature is less than the preset temperature, namely, when the backboard temperature reaches the target temperature, the actual display effect of the liquid crystal display is optimal.
According to the technical scheme, the first temperature sensor is arranged outside the liquid crystal display, the heater and the second temperature sensor are arranged on the back plate of the liquid crystal display, the ambient temperature collected by the first temperature sensor is acquired in real time and is compared with the preset temperature, when the ambient temperature is lower than the preset temperature, the back plate temperature of the liquid crystal display collected by the second temperature sensor is acquired, and the heating power of the heater is determined according to the back plate temperature and the ambient temperature, wherein the display effect is poor due to the fact that the starting voltages of the displays are consistent under the low-temperature environments, and therefore when the temperature difference value of the back plate temperature and the ambient temperature changes, the heating power also changes accordingly. And controlling the heater to work with the heating power, so that when the temperature of the back plate reaches the target temperature, the display effect of the liquid crystal display reaches the optimal technical scheme, thereby solving the problem of poor display effect when the liquid crystal display is started at a low temperature and improving the display effect of the liquid crystal display in a low-temperature environment.
Second embodiment:
as shown in fig. 5, fig. 5 is a detailed flowchart of step S120 of the first embodiment of the present invention, and the step of determining the heating power of the heater according to the back plate temperature and the ambient temperature of the present invention includes:
step S121, determining a temperature difference value between the back plate temperature and the environment temperature;
step S122, converting the temperature difference into working voltage variation based on a preset conversion mode;
and S123, determining a duty ratio according to the working voltage variation, and adjusting the heating power of the heater by adopting the duty ratio.
In this embodiment, the temperature of the back plate is a surface temperature of the liquid crystal display, and the preset temperature is a temperature at which a display effect of the liquid crystal display is better. The heating power of the heater is different at different temperatures. And determining a temperature difference value between the temperature of the back plate and the ambient temperature, and converting the temperature difference value into a working voltage variation based on a preset conversion mode. Specifically, the preset conversion mode is a PID algorithm, the PID algorithm is used to convert the temperature difference value into a control variable working voltage variation, the duty ratio is controlled by the working voltage variation, and the duty ratio is used to adjust the heating power of the heater, so that the heating powers of the heaters at different temperatures are different.
Wherein, the PID algorithm is as follows:
the operating voltage of the heater is different at different temperatures. Assuming an ambient temperature of T2 and a backplane temperature of T3, the temperature difference between the backplane temperature and the ambient temperature can be expressed as: T3-T2. The working voltage of the heater corresponding to the environment temperature T2 is UK-1(ii) a The working voltage of the heater corresponding to the back plate temperature T3 is UKIf the variation of the operating voltage is Δ UK。
Optionally, after determining the heating power of the heater according to the temperature of the back plate and the ambient temperature, the heater is controlled to operate with the heating power. Due to the problem of heat loss in the actual heating process, in order to achieve the best display effect, the temperature needs to be compensated, the temperature can be compensated by correcting the heating power, and the heater is controlled to work at the corrected heating power. And when the ambient temperature is lower than the preset temperature, acquiring the back plate temperature of the liquid crystal display collected by the second temperature sensor. And determining the heating power of the heater according to the temperature of the back plate and the ambient temperature, and controlling the heater to perform with the adjusted heating power. By the above-described cyclic operation process, the heating of the heater is stopped until the time when the temperature of the back plate is detected to reach the target temperature.
Optionally, the step of correcting the heating power to obtain a corrected heating power may include: step S141, obtaining a heat dissipation coefficient, a back plate area and a compensation coefficient of the liquid crystal display; and step S142, obtaining the corrected heating power according to the heat dissipation coefficient, the area of the back plate, the compensation coefficient and the temperature difference. And step S143, controlling the heater to operate at the corrected heating power.
The heat dissipation coefficient, the back plate area and the compensation coefficient of the liquid crystal display are calibrated in advance. The heat dissipation coefficient can be determined according to the type and the material of the liquid crystal display. The area of the back plate can be determined according to the size of the liquid crystal display. The compensation coefficient can be calibrated according to historical use conditions. After the heat dissipation coefficient, the back plate area and the compensation coefficient of the liquid crystal display are obtained, the corrected heating power can be determined according to the heat dissipation coefficient, the back plate area, the compensation coefficient and the temperature difference value between the ambient temperature and the ambient temperature.
Specifically, in the step S142, the step of obtaining the corrected heating power according to the heat dissipation coefficient, the back plate area, the compensation coefficient, and the temperature difference may specifically include: step S1421, determining the product of the heat dissipation coefficient, the back plate area and the temperature difference; step S1422, determining a ratio of the product to the compensation coefficient; and step S1423, obtaining the corrected heating power according to the ratio.
Wherein, the heat dissipation coefficient is K, the area of the back plate is S, the compensation coefficient is 0.95, and the temperature difference is T3-T2, then the corrected heating power is: p ═ KS/0.95 (T3-T2), where T3 is the backsheet temperature.
Due to the adoption of the technical means of obtaining the corrected heating power according to the heat dissipation coefficient, the area of the back plate, the compensation coefficient and the temperature difference value and controlling the heater to correct the corrected heating power, the problem that the error exists between the detected temperature and the actual temperature due to heat loss in the actual heating process is solved, and the display effect of the liquid crystal display is improved.
According to the technical scheme, the temperature difference value between the back plate temperature and the environment temperature is determined, the temperature difference value is converted into the working voltage transformation quantity in a preset conversion mode, the duty ratio corresponding to the working voltage transformation quantity is determined, and the heating power of the heater is adjusted by the duty ratio, so that the heating power of the heater changes along with the environment temperature and the back plate temperature.
The third embodiment:
as shown in fig. 6, fig. 6 is a schematic flow chart after step S140 according to the first embodiment of the present invention, and the step of controlling the heater to operate at the heating power of the present invention includes:
step S210, detecting whether the temperature of the back plate reaches a target temperature;
when the temperature of the back plate does not reach the target temperature, returning to the step S130 to control the heater to work at the heating power so that the temperature of the back plate reaches the target temperature;
when the temperature of the back plate reaches the target temperature, step S220 is executed to stop the operation of the heater.
In this embodiment, after controlling the heater to operate at the heating power, whether the temperature of the back plate reaches a target temperature is detected in real time. And when the temperature of the back plate reaches the target temperature, stopping the operation of the heater. And when the temperature of the back plate does not reach the target temperature, returning to the step of controlling the heater to work at the heating power so that the temperature of the back plate reaches the target temperature.
Wherein, the loss of heat in the actual heating process: q2 ═ KS (T3-T2), where heat dissipation coefficient is the back plate area, and after the heater reaches thermal equilibrium, i.e., Pt ═ Q1+ Q2 ═ CM (T3-T2) + KS (T3-T2), the temperature remains relatively stable and does not rise any longer, and Pt ═ T3-T2) + KS (T3-T2) is differentiated to obtain Pdt ═ CM (T3-T2) dt + KS (T3-T2) dt, and at this time T3 ═ T2+ 0.95P/KS. The working temperature of the liquid crystal display reaches the temperature of the optimal starting state, and the normal work of the liquid crystal display panel is realized.
According to the technical scheme, the method comprises the steps of detecting whether the temperature of the back plate reaches the target temperature in real time in the process of controlling the heater to work with the heating power, returning to execute the step of controlling the heater to work with the heating power when the temperature of the back plate does not reach the target temperature, enabling the temperature of the back plate to reach the target temperature, and stopping the heater when the temperature of the back plate reaches the target temperature, so that the control of the heater is realized, and the display effect of the liquid crystal display panel is optimal.
The fourth embodiment:
the following is a refinement of step S130 of the first embodiment, and the step of determining the heating power of the heater according to the back plate temperature and the ambient temperature includes:
step S131, acquiring the environmental humidity acquired by the humidity sensor;
step S132, determining a humidity difference value between the environment humidity and a preset humidity, and determining a first temperature compensation value according to the humidity difference value;
step S133, determining the heating power of the heater according to the first temperature compensation value, the back plate temperature and the ambient temperature.
In this embodiment, since the ambient humidity has a certain influence on the heat dissipation, the detected back plate temperature of the liquid crystal display has a deviation, and therefore, a humidity sensor is further disposed on the display heating compensation device, the humidity sensor is disposed outside the liquid crystal display, and the temperature sensor can also be disposed inside the liquid crystal display. The method comprises the steps of acquiring the ambient humidity acquired by a humidity sensor, determining the humidity difference value between the ambient humidity and the preset humidity, determining a first temperature compensation value according to the humidity difference value, compensating the temperature of the back plate by adopting the first temperature compensation value, and determining the heating power of the heater according to the first temperature compensation value, the temperature of the back plate and the ambient temperature. The temperature of the back plate is compensated by the first temperature compensation value, so that the temperature detection precision is improved.
Optionally, in other embodiments, the step of determining the heating power of the heater according to the temperature of the back plate and the ambient temperature may further include:
step S231, obtaining display content of the liquid crystal display;
step S232, determining a second temperature compensation value according to the display content, wherein when the display content changes, the second temperature compensation value also changes;
step S233, determining the heating power of the heater according to the second temperature compensation value, the back plate temperature and the ambient temperature.
In the present embodiment, the compensation value may also be determined according to the display content of the liquid crystal display panel. The memory occupied by different display contents is not consistent in size and loss. Therefore, the display content of the liquid crystal display panel, which may be characters or pictures, may be acquired. It can be understood that the image occupies more memory than the text. Therefore, a second temperature compensation value is determined according to the display content of the liquid crystal display panel, wherein when the display content changes, the second temperature compensation value also changes. And determining the heating power of the heater according to the second temperature compensation value, the back plate temperature and the ambient temperature. The temperature of the back plate is compensated by the second temperature compensation value, so that the temperature detection precision is improved.
Optionally, the heating power of the heater may also be determined according to a first temperature compensation value determined by the humidity difference, a second temperature compensation value determined by the display content, the backboard temperature, and the ambient temperature. The temperature of the back plate is compensated by the first temperature compensation value and the second temperature compensation value, so that the temperature detection precision is improved.
While a logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in an order different than presented herein.
Based on the same inventive concept, an embodiment of the present invention further provides a display heating compensation system, and referring to fig. 7, fig. 7 is a schematic diagram of the display heating compensation system according to the present invention. The display heating compensation system includes an acquisition module 110, a determination module 120, and a control module 130, the determination module 120 being coupled to the acquisition module 110, the control module 130 being coupled to the determination module 120, wherein,
the obtaining module 110 is configured to obtain an ambient temperature collected by the first temperature sensor, and obtain a backplane temperature of the liquid crystal display collected by the second temperature sensor when the ambient temperature is less than a preset temperature;
the determining module 120 is configured to determine the heating power of the heater according to the back plate temperature and the ambient temperature; optionally, the determining module 120 is further configured to determine a temperature difference between the backplane temperature and the ambient temperature; converting the temperature difference into working voltage variation based on a preset conversion mode; and determining a duty ratio according to the working voltage variation, and adjusting the heating power of the heater by adopting the duty ratio. Optionally, the determining module 120 is further configured to obtain the ambient humidity collected by the humidity sensor; determining a humidity difference value between the environment humidity and a preset humidity, and determining a first temperature compensation value according to the humidity difference value; and determining the heating power of the heater according to the first temperature compensation value, the back plate temperature and the ambient temperature. Optionally, the determining module 120 is further configured to obtain display content of a liquid crystal display; determining a second temperature compensation value according to the display content, wherein the second temperature compensation value changes when the display content changes; and determining the heating power of the heater according to the second temperature compensation value, the back plate temperature and the ambient temperature.
The control module 130 is configured to control the heater to operate at the heating power, so that the temperature of the back plate reaches a target temperature. Optionally, the control module 130 is further configured to obtain a heat dissipation coefficient, a back plate area, and a compensation coefficient of the liquid crystal display; and obtaining the corrected heating power according to the heat dissipation coefficient, the area of the back plate, the compensation coefficient and the temperature difference value. The control module 130 is further configured to determine a product of the heat dissipation coefficient, the backplane area, and the temperature difference; determining a ratio of the product to the compensation factor; and obtaining the corrected heating power according to the ratio.
Optionally, the control module 130 is further configured to detect whether the temperature of the back plate reaches a target temperature; when the temperature of the back plate does not reach the target temperature, the step of controlling the heater to work at the heating power to enable the temperature of the back plate to reach the target temperature is executed in a return mode; and stopping the operation of the heater when the temperature of the back plate reaches the target temperature.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The display heating compensation method is characterized by being applied to a display heating compensation device, wherein the display heating compensation device comprises a liquid crystal display, a heater, a first temperature sensor and a second temperature sensor, the first temperature sensor is arranged outside the liquid crystal display, and the heater and the second temperature sensor are arranged on a back plate of the liquid crystal display; the display heating compensation method comprises the following steps:
acquiring an ambient temperature acquired by the first temperature sensor;
when the ambient temperature is lower than a preset temperature, acquiring the back plate temperature of the liquid crystal display, which is acquired by the second temperature sensor;
determining the heating power of the heater according to the temperature of the back plate and the ambient temperature;
and controlling the heater to work at the heating power so that the temperature of the back plate reaches a target temperature, wherein the target temperature is greater than or equal to the preset temperature.
2. The display heating compensation method of claim 1, wherein the step of determining the heating power of the heater based on the backplane temperature and the ambient temperature comprises:
determining a temperature difference between the backplane temperature and the ambient temperature;
converting the temperature difference into working voltage variation based on a preset conversion mode;
and determining a duty ratio according to the working voltage variation, and adjusting the heating power of the heater by adopting the duty ratio.
3. The display heating compensation method of claim 2, wherein the step of controlling the heater to operate at the heating power comprises:
obtaining a heat dissipation coefficient, a back plate area and a compensation coefficient of the liquid crystal display;
obtaining corrected heating power according to the heat dissipation coefficient, the area of the back plate, the compensation coefficient and the temperature difference value;
and controlling the heater to work at the corrected heating power.
4. The method of claim 3, wherein the step of obtaining the corrected heating power according to the heat dissipation factor, the backplane area, the compensation factor, and the temperature difference comprises:
determining the product of the heat dissipation coefficient, the area of the back plate and the temperature difference;
determining a ratio of the product to the compensation factor;
and obtaining the corrected heating power according to the ratio.
5. The display heating compensation method of claim 1, wherein the step of controlling the heater to operate at the heating power is followed by further comprising:
detecting whether the temperature of the back plate reaches a target temperature;
when the temperature of the back plate does not reach the target temperature, the step of controlling the heater to work at the heating power to enable the temperature of the back plate to reach the target temperature is executed in a return mode;
and stopping the operation of the heater when the temperature of the back plate reaches the target temperature.
6. The display heating compensation method of claim 1, wherein the display heating compensation device further comprises a humidity sensor, and the humidity sensor is disposed outside the liquid crystal display; the step of determining the heating power of the heater according to the temperature of the back plate and the ambient temperature further comprises:
acquiring the ambient humidity acquired by the humidity sensor;
determining a humidity difference value between the environment humidity and a preset humidity, and determining a first temperature compensation value according to the humidity difference value;
and determining the heating power of the heater according to the first temperature compensation value, the back plate temperature and the ambient temperature.
7. The display heating compensation method of claim 1, wherein the step of determining the heating power of the heater based on the backplane temperature and the ambient temperature comprises:
acquiring display content of a liquid crystal display;
determining a second temperature compensation value according to the display content, wherein the second temperature compensation value changes when the display content changes;
and determining the heating power of the heater according to the second temperature compensation value, the back plate temperature and the ambient temperature.
8. A display heating compensation apparatus, comprising:
a liquid crystal display;
a first temperature sensor disposed outside the liquid crystal display;
the heater and the second temperature sensor are arranged on the back plate of the liquid crystal display;
the temperature acquisition circuit is connected with the first temperature sensor and the second temperature sensor and is used for acquiring the ambient temperature acquired by the first temperature sensor and acquiring the back plate temperature of the liquid crystal display acquired by the second temperature sensor;
the temperature comparison circuit is connected with the temperature acquisition circuit and is used for determining the heating power of the heater according to the temperature of the back plate and the ambient temperature;
and the temperature control circuit is respectively connected with the temperature comparison circuit and the temperature acquisition circuit.
9. The display heating compensation device of claim 8, wherein the heater comprises a heating element and a conductive heating film.
10. A display heating compensation system, comprising:
the acquisition module is used for acquiring the ambient temperature acquired by the first temperature sensor and acquiring the back plate temperature of the liquid crystal display acquired by the second temperature sensor when the ambient temperature is lower than a preset temperature;
the determining module is connected with the acquiring module and used for determining the heating power of the heater according to the temperature of the back plate and the ambient temperature;
and the control module is connected with the control module and used for controlling the heater to work at the heating power so that the temperature of the back plate reaches a target temperature.
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| CN114397778B (en) | 2023-10-10 |
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