CN114397778B - Display heating compensation method, device and system - Google Patents
Display heating compensation method, device and system Download PDFInfo
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- CN114397778B CN114397778B CN202111681360.9A CN202111681360A CN114397778B CN 114397778 B CN114397778 B CN 114397778B CN 202111681360 A CN202111681360 A CN 202111681360A CN 114397778 B CN114397778 B CN 114397778B
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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 display heating compensation method, a device and a system, which are applied to the technical field of liquid crystal display; acquiring an ambient temperature acquired by the first temperature sensor; acquiring the backboard temperature of the liquid crystal display acquired by the second temperature sensor when the environmental temperature is smaller than a preset temperature; determining heating power of the heater according to the back plate temperature and the environment temperature; the heater is controlled to work with the heating power, 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, the problem of poor display effect of the liquid crystal display during low-temperature starting is solved, and the display effect of the liquid crystal display in a low-temperature environment is improved.
Description
Technical Field
The present invention relates to the field of liquid crystal display technologies, and in particular, to a display heating compensation method, device, and system.
Background
The turn-on speed of the TFT-LCD (Thin film transistor liquid crystal display ) is affected with a decrease in temperature. At present, for 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 in the low-temperature environment. However, the temperature compensation resistor has a smaller adjustment range, and the turn-on voltage of the TFT-LCD display at each temperature below 0 ℃ is the same, so that the display effect of the TFT-LCD display is seriously affected.
Disclosure of Invention
The embodiment of the invention provides a display heating compensation method, a device and a system, which aim to solve the problem of poor display effect when a liquid crystal display is started at 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, wherein 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;
acquiring the backboard temperature of the liquid crystal display acquired by the second temperature sensor when the environmental temperature is smaller than a preset temperature;
determining heating power of the heater according to the back plate temperature and the environment temperature;
and controlling the heater to work with 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 an embodiment, the step of determining the heating power of the heater according to the back plate temperature and the ambient temperature comprises:
determining a temperature difference between the back plate temperature and the ambient temperature;
converting the temperature difference value into a working voltage variation based on a preset conversion mode;
and determining a duty ratio according to the working voltage variation, and adopting the duty ratio to adjust the heating power of the heater.
In one embodiment, the step of controlling the heater to operate at the heating power includes:
acquiring 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 back plate area, the compensation coefficient and the temperature difference value;
and controlling the heater to work with 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 value includes:
determining the product of the heat dissipation coefficient, the back plate area and the temperature difference value;
determining a ratio of the product to the compensation coefficient;
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 backboard reaches a target temperature;
returning to the step of executing the control of the heater to operate at the heating power so that the back plate temperature reaches the target temperature when the back plate temperature does not reach the target temperature;
and stopping the operation of the heater when the temperature of the back plate reaches the target temperature.
In an 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 back plate temperature and the ambient temperature further comprises:
acquiring the ambient humidity acquired by the humidity sensor;
determining a humidity difference value between the ambient 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 environment temperature.
In an embodiment, the step of determining the heating power of the heater according to the back plate 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 also 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 environment 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;
a heater and a second temperature sensor disposed on a 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 back plate temperature and the environment 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 an electrically 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 smaller than a preset temperature;
the determining module is connected with the acquisition module and is used for determining the heating power of the heater according to the back plate temperature and the environment temperature;
and the control module is connected with the control module and is used for controlling the heater to work with the heating power so that the temperature of the back plate reaches the target temperature.
According to the technical scheme of the display heating compensation method, the display heating compensation device and the display heating compensation system, 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 acquired by the first temperature sensor is acquired in real time, the ambient temperature is compared with the preset temperature, when the ambient temperature is smaller than the preset temperature, the back plate temperature of the liquid crystal display acquired 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 voltage of the display is consistent under each temperature of a low-temperature environment, and therefore when the temperature difference value between the back plate temperature and the ambient temperature changes, the heating power also changes. The heater is controlled to work with the heating power until the display effect of the liquid crystal display reaches the optimal technical scheme when the temperature of the back plate reaches the target temperature, so that the problem of poor display effect of the liquid crystal display in low-temperature starting 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 showing the operation variation of the LCD under different leakage currents and different operation voltages according to the present invention;
FIG. 4 is a flowchart of a display heating compensation method according to a first embodiment of the present invention;
FIG. 5 is a detailed flowchart of step S120 in the first embodiment of the display heating compensation method of the present invention;
FIG. 6 is a flowchart illustrating a display heating compensation method according to the first embodiment of the present invention after step S140;
FIG. 7 is a schematic diagram of a display heating compensation system according to the present invention;
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to embodiments, with reference to the accompanying drawings, which are only illustrations of one embodiment, but not all of the inventions.
Detailed Description
In order that the above-described aspects may be better understood, 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 running environment according to an embodiment of the present invention.
It should be noted that fig. 1 may be a schematic structural diagram of a hardware operating environment of the display heating compensation device.
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 provided to a back plate of the liquid crystal display; a temperature acquisition circuit 102, a temperature comparison circuit 103, and a temperature control circuit 104; and a first temperature sensor 200 disposed outside the liquid crystal display. Wherein, the liquid crystal display device comprises a liquid crystal display device,
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 temperature of the back plate 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 an 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 includes 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 heated uniformly.
Optionally, the display heating compensation device may further include: a processor 1001, such as a CPU, a communication bus 1002, a memory 1003. Wherein the communication bus 1002 is used to enable connected communication between these components. The memory 1003 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1003 may alternatively be a storage device separate from the processor 1001 described above.
Optionally, the display heating compensation device may further include: the user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further 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).
It will be appreciated by those skilled in the art that the display heating compensation apparatus structure shown in fig. 1 is not limiting of the display heating compensation apparatus and may include more or fewer components than shown, or may be combined with certain components, or may be arranged with different components.
First embodiment:
as shown in fig. 4, in a first embodiment of the present invention, the display heating compensation method of the present invention includes the steps of:
step S110, acquiring the ambient temperature acquired by the first temperature sensor;
step S120, when the ambient temperature is less than a preset temperature, acquiring the back plate temperature of the liquid crystal display acquired by the second temperature sensor;
step S130, determining the heating power of the heater according to the back plate temperature and the environment temperature;
and 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 low, the operation performance of the electronic device is affected, the activity of the lcd is reduced, so that the opening speed of the lcd is affected, and at present, in a low temperature environment, the opening voltage of the lcd is increased by the temperature compensation resistor, so as to increase the opening speed of the lcd, so that the lcd can also operate normally in a low temperature environment. However, the temperature compensation resistor has a small adjustment range, so that the starting voltage of the liquid crystal display is the same at each temperature below 0 ℃, and the display effect of the liquid crystal display is poor. Therefore, the invention designs a display heating compensation method. The invention is provided with the heater and the second temperature sensor on the backboard of the liquid crystal display, and the first temperature sensor is arranged outside the liquid crystal display, so that the working temperature of the liquid crystal display can be maintained at a constant temperature under different environment temperatures by controlling the heating mode of the heater. Thus, 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 disposed on a back plate of the liquid crystal display. Referring to fig. 2, the heater (i.e., heater) is adhered to a back plate (i.e., liquid crystal cell) of the liquid crystal display by an optical adhesive. Wherein the heater may be used to heat a portion of the liquid crystal cell, for example, a center portion of the liquid crystal cell. The heater can also heat the whole liquid crystal box, so that the whole liquid crystal box is heated uniformly. 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 less the heating power. The farther the distance between the heater and the liquid crystal cell, the greater the heating power.
In this embodiment, the temperature sensor is arranged in the following two ways: first, through setting up temperature sensor on LCD's backplate, adopt temperature sensor to gather ambient temperature. The ambient 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 heating process of the heater. And the second temperature sensor can be arranged outside the liquid crystal display and used for detecting the ambient temperature, and the second temperature sensor is arranged on the liquid crystal display and used for detecting the back plate temperature (namely the surface temperature) of the liquid crystal display, so that the measured back plate temperature is more accurate.
The present invention is exemplified by the second type of temperature sensor arrangement.
Alternatively, the preset temperature may be set according to actual situations, for example, the preset temperature may be set according to parameters such as performance parameters and 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 the abscissa in fig. 3 represents the operating voltage of the NMOS transistor, and the ordinate represents the leakage current of the NMOS transistor. The display effect of the liquid crystal display is the worst when the preset temperature is set to 100 ℃. Therefore, the preset temperature can be set to 10 ℃, so that the liquid crystal display achieves good display effect.
In this embodiment, when the liquid crystal display starts to operate, the ambient temperature collected by the first temperature sensor is obtained, the collected ambient temperature is compared with the preset temperature, and when the ambient temperature is smaller than the preset temperature, it indicates that the external ambient temperature is lower at this time, which may affect the display effect of the liquid crystal display. Therefore, when the ambient temperature is smaller than the preset temperature, the back plate temperature of the liquid crystal display acquired by the second temperature sensor is acquired, 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, heating by a heater is not required.
Specifically, when the ambient temperature is less than a preset temperature, acquiring the back plate temperature of the liquid crystal display acquired by the second temperature sensor. And determining the heating power of the heater according to the back plate temperature and the environment temperature. The temperature control circuit can output the duty ratio, the NMOS transistor is controlled to drive the power resistor to heat through the bleeder resistor, and meanwhile, the current flowing through the power resistor flows into the conductive heating film to control the conductive heating film to heat so that the liquid crystal display panel is heated uniformly.
In the process, the back plate temperature of the liquid crystal display acquired by the second temperature sensor is acquired in real time, the back plate temperature is compared with the ambient temperature, and the heating power of the heater is continuously changed according to the temperature difference value between the back plate temperature and the ambient temperature, so that the back plate temperature 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 optimize 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 back plate temperature reaches the target temperature, the display effect of the liquid crystal display is better than that when the back plate temperature is smaller than the preset temperature, namely, when the back plate 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 backboard of the liquid crystal display, the ambient temperature collected by the first temperature sensor is obtained in real time and compared with the preset temperature, when the ambient temperature is smaller than the preset temperature, the backboard temperature of the liquid crystal display collected by the second temperature sensor is obtained, and the heating power of the heater is determined according to the backboard temperature and the ambient temperature, wherein the display effect is poor due to the fact that the starting voltage of the display is consistent under each temperature of a low-temperature environment, and therefore when the temperature difference value between the backboard temperature and the ambient temperature changes, the heating power also changes. The heater is controlled 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, the problem of poor display effect when the liquid crystal display is started at low temperature is solved, and the display effect of the liquid crystal display in a low-temperature environment is improved.
Second embodiment:
as shown in fig. 5, fig. 5 is a schematic diagram of a refinement flow chart of step S120 in 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 according to the present invention includes:
step S121, determining a temperature difference between the back plate temperature and the ambient temperature;
step S122, converting the temperature difference value into a working voltage variation based on a preset conversion mode;
and step S123, determining a duty ratio according to the working voltage variation, and adopting the duty ratio to adjust the heating power of the heater.
In this embodiment, the temperature of the back plate is the surface temperature of the liquid crystal display, and the preset temperature is the temperature with better display effect of the liquid crystal display. At different temperatures, the heating power of the heater is different. And determining a temperature difference value between the back plate temperature 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 temperature difference value is converted into a control quantity working voltage variable quantity by the PID algorithm, the duty ratio is controlled by the working voltage variable quantity, and the heating power of the heater is adjusted by adopting the duty ratio, so that the heating powers of the heater at different temperatures are different.
Wherein, the PID algorithm is as follows:
the operating voltages of the heaters are different at different temperatures. Assuming that the ambient temperature is T2 and the back plate temperature is T3, the temperature difference between the back plate temperature and the ambient temperature may be expressed as: Δt=t3-T2. The working voltage of the heater corresponding to the ambient temperature T2 is U K-1 The method comprises the steps of carrying out a first treatment on the surface of the The working voltage of the heater corresponding to the back plate temperature T3 is U K The variation of the operating voltage is DeltaU K 。
Optionally, after determining the heating power of the heater according to the back plate temperature and the ambient temperature, the controlling the heater operates with the heating power. Since there is a problem of heat loss during the actual heating process, in order to optimize the display effect, it is necessary to compensate for the temperature, and the temperature can be compensated by correcting the heating power, and the heater is controlled to operate with the corrected heating power. And when the ambient temperature is smaller than the preset temperature, acquiring the back plate temperature of the liquid crystal display acquired by the second temperature sensor. And determining the heating power of the heater according to the back plate temperature and the environment temperature, and controlling the heater to perform the adjusted heating power. Through the above-described cyclic operation process, the heating by the heater is stopped until the back plate temperature 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 corrected heating power according to the heat dissipation coefficient, the back plate area, the compensation coefficient and the temperature difference value. And step S143, controlling the heater to work with 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 model and the material of the liquid crystal display. The back plate area may 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 between the ambient temperature and the ambient temperature.
Specifically, in 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 value; step S1422, determining the ratio of the product to the compensation coefficient; and step S1423, obtaining corrected heating power according to the ratio.
Wherein, the heat dissipation coefficient is K, the back plate area is S, the compensation coefficient is 0.95, the temperature difference is Δt=t3-t2, and the corrected heating power is: p= (T3-T2) KS/0.95, where T3 is the back plate temperature.
The corrected heating power is obtained according to the heat dissipation coefficient, the back plate area, the compensation coefficient and the temperature difference value, so that the technical means of controlling the heater to correct by the corrected heating power is adopted, the problem that errors exist 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 ambient temperature is determined, the temperature difference value is converted into the working voltage conversion quantity by adopting the preset conversion mode, and the duty ratio corresponding to the working voltage conversion quantity is determined, so that the heating power of the heater is changed along with the change of the ambient temperature and the back plate temperature by adopting the technical means of adjusting the heating power of the heater by adopting the duty ratio.
Third embodiment:
as shown in fig. 6, fig. 6 is a schematic flow chart after step S140 in the first embodiment of the present invention, and the step of controlling the heater to operate at the heating power in the present invention includes:
step S210, detecting whether the backboard temperature reaches a target temperature;
returning to step S130 to control the heater to operate at the heating power so that the back plate temperature reaches the target temperature when the back plate temperature does not reach the target temperature;
and when the back plate temperature reaches the target temperature, executing step S220 to stop the operation of the heater.
In this embodiment, after the heater is controlled to operate at the heating power, whether the back plate temperature reaches a target temperature is detected in real time. And stopping the operation of the heater when the temperature of the back plate reaches the target temperature. And when the back plate temperature does not reach the target temperature, returning to the step of controlling the heater to work with the heating power so that the back plate temperature reaches the target temperature.
Wherein, heat loss in actual heating process: q2=ks (T3-T2), wherein, as the heat dissipation coefficient, is the back plate area, after the heater reaches the heat balance, i.e. pt=q1+q2=cm (T3-T2) +ks (T3-T2), the temperature remains relatively stable and does not rise any more, and pt= (T3-T2) +ks (T3-T2) is differentiated to obtain pdt=cm (T3-T2) dt+ks (T3-T2) dt, where t3=t2+0.95P/KS. The working temperature of the liquid crystal display reaches the temperature of the optimal opening state, and the normal work of the liquid crystal display panel is realized.
According to the above technical solution, the method includes detecting whether the back plate temperature reaches the target temperature in real time during the process of controlling the heater to work with the heating power, and executing the step of controlling the heater to work with the heating power when the back plate temperature does not reach the target temperature, so that the back plate temperature reaches the target temperature, and stopping the operation of the heater when the back plate temperature 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.
Fourth embodiment:
the following is a refinement step of the first embodiment step S130, where 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 ambient humidity acquired by the humidity sensor;
step S132, determining a humidity difference value between the ambient humidity and a preset humidity, and determining a first temperature compensation value according to the humidity difference value;
and step S133, determining the heating power of the heater according to the first temperature compensation value, the back plate temperature and the environment temperature.
In this embodiment, since the ambient humidity has a certain influence on heat dissipation, the detected temperature of the back plate of the liquid crystal display has a deviation, and therefore, the display heating compensation device is further provided with a humidity sensor, the humidity sensor is disposed outside the liquid crystal display, and the temperature sensor may also be disposed inside the liquid crystal display. Acquiring the ambient humidity acquired by the humidity sensor, determining a humidity difference value between the ambient humidity and preset humidity, determining a first temperature compensation value according to the humidity difference value, compensating the back plate temperature by adopting the first temperature compensation value, and determining the heating power of the heater according to the first temperature compensation value, the back plate temperature and the ambient temperature. And the temperature of the backboard is compensated by adopting 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 back plate temperature and the ambient temperature may further include:
step S231, obtaining display content of a liquid crystal display;
step S232, determining a second temperature compensation value according to the display content, wherein the second temperature compensation value is changed when the display content is changed;
and step S233, determining heating power of the heater according to the second temperature compensation value, the back plate temperature and the ambient temperature.
In this embodiment, the compensation value may also be determined according to the display content of the liquid crystal display panel. The memory size occupied by different display contents is inconsistent, and the loss is also inconsistent. Therefore, the display content of the liquid crystal display panel can be acquired, and the display content of the liquid crystal display panel can be characters or pictures. It will be appreciated 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 is changed, the second temperature compensation value is also changed. And determining the heating power of the heater according to the second temperature compensation value, the back plate temperature and the environment temperature. And the temperature of the backboard is compensated by adopting 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 the first temperature compensation value determined by the humidity difference, the second temperature compensation value determined by the display content, the back plate temperature and the ambient temperature. And the temperature of the backboard is compensated by adopting the first temperature compensation value and the second temperature compensation value, so that the temperature detection precision is improved.
Embodiments of the present invention provide embodiments of a display heating compensation method, it being noted that although a logic sequence is shown in the flow chart, in some cases the steps shown or described may be performed in a different order than that shown or described herein.
Based on the same inventive concept, the embodiment of the invention also provides a display heating compensation system, referring to fig. 7, fig. 7 is a schematic diagram of the display heating compensation system of the invention. The display heating compensation system comprises an acquisition module 110, a determination module 120 and a control module 130, wherein the determination module 120 is connected with the acquisition module 110, the control module 130 is connected with the determination module 120, wherein,
the acquiring module 110 is configured to acquire an ambient temperature acquired by the first temperature sensor, and acquire a back plate temperature of the liquid crystal display acquired by the second temperature sensor when the ambient temperature is less than a preset temperature;
the determining module 120 is configured to determine a 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 back plate temperature and the ambient temperature; converting the temperature difference value into a working voltage variation based on a preset conversion mode; and determining a duty ratio according to the working voltage variation, and adopting the duty ratio to adjust the heating power of the heater. Optionally, the determining module 120 is further configured to acquire the ambient humidity acquired by the humidity sensor; determining a humidity difference value between the ambient 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 environment temperature. Optionally, the determining module 120 is further configured to obtain display content of the liquid crystal display; determining a second temperature compensation value according to the display content, wherein the second temperature compensation value also 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 environment temperature.
The control module 130 is configured to control the heater to operate with the heating power such that the back plate temperature 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 corrected heating power according to the heat dissipation coefficient, the back plate area, the compensation coefficient and the temperature difference value. The control module 130 is further configured to determine a product of the heat dissipation factor, the back plate area, and the temperature difference; determining a ratio of the product to the compensation coefficient; and obtaining the corrected heating power according to the ratio.
Optionally, the control module 130 is further configured to detect whether the back plate temperature reaches a target temperature; returning to the step of executing the control of the heater to operate at the heating power so that the back plate temperature reaches the target temperature when the back plate temperature does not reach the target temperature; and stopping the operation of the heater when the temperature of the back plate reaches the target temperature.
It will be appreciated by those skilled in the art that 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 use of the words first, second, third, etc. do not denote any order. 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. It is therefore intended that the following claims be interpreted as including the 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 modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
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;
acquiring the backboard temperature of the liquid crystal display acquired by the second temperature sensor when the environmental temperature is smaller than a preset temperature;
determining a temperature difference between the back plate temperature and the ambient temperature;
converting the temperature difference value into a working voltage variation based on a preset conversion mode;
determining a duty ratio according to the working voltage variation, and adjusting the heating power of the heater by adopting the duty ratio;
and controlling the heater to work with 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 controlling the heater to operate at the heating power comprises:
acquiring 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 back plate area, the compensation coefficient and the temperature difference value;
and controlling the heater to work with the corrected heating power.
3. The display heating compensation method of claim 2, wherein the step of obtaining the corrected heating power based on the heat dissipation factor, the back plate area, the compensation factor, and the temperature difference value comprises:
determining the product of the heat dissipation coefficient, the back plate area and the temperature difference value;
determining a ratio of the product to the compensation coefficient;
and obtaining the corrected heating power according to the ratio.
4. The display heating compensation method of claim 1, wherein after the step of controlling the heater to operate at the heating power, further comprising:
detecting whether the temperature of the backboard reaches a target temperature;
returning to the step of executing the control of the heater to operate at the heating power so that the back plate temperature reaches the target temperature when the back plate temperature does not reach the target temperature;
and stopping the operation of the heater when the temperature of the back plate reaches the target temperature.
5. The display heating compensation method according to claim 1, wherein the display heating compensation device further comprises a humidity sensor, and the humidity sensor is disposed outside the liquid crystal display; before the step of determining the temperature difference between the back plate temperature and the ambient temperature, the method further comprises:
acquiring the ambient humidity acquired by the humidity sensor;
determining a humidity difference value between the ambient humidity and a preset humidity, and determining a first temperature compensation value according to the humidity difference value;
and compensating the temperature of the backboard by adopting the first temperature compensation value.
6. The display heating compensation method of claim 1, wherein prior to the step of determining a temperature difference between the back plate temperature and the ambient temperature, further comprising:
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 also changes when the display content changes;
and compensating the temperature of the backboard by adopting a second temperature compensation value.
7. A display heating compensation apparatus, the display heating compensation apparatus comprising:
a liquid crystal display;
a first temperature sensor disposed outside the liquid crystal display;
a heater and a second temperature sensor disposed on a 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 a temperature difference value between the back plate temperature and the environment temperature; converting the temperature difference value into a working voltage variation based on a preset conversion mode; determining a duty ratio according to the working voltage variation, and adjusting the heating power of the heater by adopting the duty ratio;
and the temperature control circuit is respectively connected with the temperature comparison circuit and the temperature acquisition circuit.
8. The display heating compensation apparatus of claim 7, wherein the heater comprises a heating element and an electrically conductive heating film.
9. A display heating compensation system, the 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 smaller than a preset temperature;
the determining module is connected with the acquiring module and is used for determining a temperature difference value between the back plate temperature and the environment temperature; converting the temperature difference value into a working voltage variation based on a preset conversion mode; determining a duty ratio according to the working voltage variation, and adjusting the heating power of the heater by adopting the duty ratio;
and the control module is connected with the control module and is used for controlling the heater to work with the heating power so that the temperature of the back plate reaches the target temperature.
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| CN114397778A (en) | 2022-04-26 |
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