CN210110307U - Temperature control device - Google Patents
Temperature control device Download PDFInfo
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- CN210110307U CN210110307U CN201920237895.9U CN201920237895U CN210110307U CN 210110307 U CN210110307 U CN 210110307U CN 201920237895 U CN201920237895 U CN 201920237895U CN 210110307 U CN210110307 U CN 210110307U
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Abstract
The utility model discloses a temperature control device, the device includes: a liquid crystal display module having a liquid crystal display backlight area; the state detection element is used for detecting a state signal of the backlight area of the liquid crystal display, is electrically connected with the liquid crystal display module and is arranged in the backlight area of the liquid crystal display; and the backlight driving circuit is used for controlling the current value output to the liquid crystal display module according to the detection result of the state detection element, and the backlight driving circuit is connected with the liquid crystal display module through a connector of the liquid crystal display.
Description
Technical Field
The present disclosure relates to temperature control technologies, and particularly to a temperature control device for controlling backlight temperature of a liquid crystal display.
Background
The liquid crystal display module of cell-phone is from taking the backlight, and under some commonly used scenes of user (like online game, charge + recreation, 4G video, high definition video) the liquid crystal display module maintains high luminance for a long time, can make the regional temperature of backlight of liquid crystal display module continuously rise, and this high temperature region is easily touched to user's finger and/or palm and/or face, can seriously influence user experience like this, causes the slight scald of user's skin even.
The existing solutions to the above problems are:
detecting the temperature of the battery or the temperature of the mainboard through a temperature detector of the battery in the electronic equipment or a temperature detector on the mainboard, and then approximately estimating or simulating the temperature of a backlight lamp area of the liquid crystal display by using the temperature of the battery or the temperature of the mainboard; when the estimated value or the analog value indicates that the temperature of the backlight area is too high, the processor AP in the electronic device sends an instruction to the backlight driving circuit on the main board, and forces the backlight driving circuit to reduce the current value output to the backlight area of the liquid crystal display (i.e. reduce the brightness of the liquid crystal display), so as to control the temperature of the backlight area of the liquid crystal display to continue to rise.
However, the disadvantages of the prior art solutions are:
the temperature detector inside the battery or on the main board is far away from the backlight area of the liquid crystal display, so that the detection error of the temperature of the backlight area is large, and the temperature change of the backlight area cannot be reflected in real time.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiments of the present invention are expected to provide a temperature control device.
In order to achieve the above object, the embodiment of the present invention provides a technical solution that:
there is provided a temperature control apparatus, the apparatus comprising:
a liquid crystal display module having a liquid crystal display backlight area;
the state detection element is used for detecting a state signal of the backlight area of the liquid crystal display, is electrically connected with the liquid crystal display module and is arranged in the backlight area of the liquid crystal display;
and the backlight driving circuit is used for controlling the current value output to the liquid crystal display module according to the detection result of the state detection element, and the backlight driving circuit is connected with the liquid crystal display module through a connector of the liquid crystal display.
In the above solution, the state detection element is a temperature detection element;
the backlight driving circuit is a circuit for controlling the current value for outputting the characteristic temperature to the liquid crystal display module according to the detection result of the temperature detection element.
In the above scheme, the apparatus further comprises:
and the light emitting diodes are arranged in the liquid crystal display module, and the light source positions of the light emitting diodes correspond to the backlight area of the liquid crystal display.
In the above solution, the lcd backlight area is disposed inside the lcd module and near the edge of the lcd module;
the state detection element is arranged at the center of the backlight area of the liquid crystal display.
In the above scheme, the apparatus further comprises:
and the state dividing element is used for dividing the state signal into temperature intervals or brightness intervals according to the currently detected state signal, is arranged in a backlight area of the liquid crystal display, and is connected with the backlight driving circuit.
In the above scheme, the apparatus further comprises:
and the signal comparison element is used for comparing the temperature electric signal or the brightness electric signal corresponding to the state signal with a preset signal, the signal comparison element is arranged on the backlight drive circuit, and the signal comparison element is electrically connected with the state dividing element.
In the above scheme, the apparatus further comprises:
and the adjusting element is used for adjusting the current value which is output to the liquid crystal display module and corresponds to the state signal according to the comparison result of the temperature electric signal or the brightness electric signal which corresponds to the state signal and the preset signal, is arranged on the backlight drive circuit, and is electrically connected with the signal comparison element.
In the above scheme, the apparatus further comprises:
an analyzing element for determining a target luminance signal required for the current application according to the type information of the current application;
and the adjusting element is used for adjusting the current value output to the liquid crystal display module according to the comparison result of the target brightness signal, the adjusting state signal and the preset temperature signal, the adjusting element and the analyzing element are respectively arranged on the backlight drive circuit, the analyzing element is electrically connected with the adjusting element, and the adjusting element is electrically connected with the signal comparison element.
In the above scheme, the apparatus further comprises:
the signal recording element is used for recording the state signal, the signal recording element is arranged on the back light drive circuit, and the signal recording element is electrically connected with the signal comparison element;
and the adjusting element is used for adjusting the preset signal according to the state signal recorded by the signal recording element and used as the historical state signal, is arranged on the backlight drive circuit and is connected with the signal recording element.
In the above scheme, the apparatus further comprises:
the interface conversion chip is arranged on the backlight drive circuit, and the input end of the interface conversion chip is electrically connected with the state detection element; the output end of the interface conversion chip is electrically connected with the liquid crystal display module;
the interface conversion chip is provided with a control interface; and controlling the maximum current value output to the liquid crystal display module by the backlight driving circuit through the control interface.
The utility model provides a temperature control device, the device includes: the LCD module and the backlight driving circuit; the liquid crystal display module is connected with the backlight driving circuit through a liquid crystal display connector; the liquid crystal display module comprises a liquid crystal display module, a temperature detection element and a control circuit, wherein the temperature detection element is arranged in a backlight area of the liquid crystal display module and is used for detecting a temperature signal of the backlight area; and the backlight driving circuit is used for controlling the backlight driving circuit to output the maximum current value corresponding to the temperature signal to the liquid crystal display module according to the temperature signal of the backlight area. Therefore, the temperature detection element is arranged in the backlight area of the electronic equipment, so that the temperature of the backlight area of the electronic equipment can be accurately detected in real time, the maximum current output value of the backlight area can be adjusted in time, and the risk that a user is scalded due to overhigh temperature of the backlight area is avoided.
Drawings
Fig. 1 is a schematic view of a structural composition of a temperature control device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a temperature control device according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a temperature control device according to an embodiment of the present invention.
Detailed Description
In order to understand the features and technical contents of the present invention in more detail, the following description is given in conjunction with the accompanying drawings, which are only used for reference and not for limiting the present invention.
Fig. 1 is a schematic view of a structural composition of a temperature control device according to an embodiment of the present invention, as shown in fig. 1, the device includes: a liquid crystal display module 100, a state detection element 200 and a backlight driving circuit 300; the lcd module 100 has an lcd backlight area 101, and the lcd module 100 can be implemented by an lcd; the state detection element 200 is disposed in the lcd backlight area 101, electrically connected to the lcd module 100, and configured to detect a state signal of the lcd backlight area 101. The backlight driving circuit 300 is connected to the lcd module 100 through a connector (not shown) of the lcd, and the backlight driving circuit 300 has a signal processing capability for controlling the output of a corresponding current value to the lcd module 100 according to the detection result of the status detecting element 200.
Alternatively, the state detection element 200 may be a temperature detection element, for example, a temperature sensor.
When the state detection element 200 is a temperature detection element, the backlight driving circuit 300 may control to output a current value corresponding to the current temperature to the lcd module according to the detection result of the temperature detection element 200.
Here, the temperature detection element may specifically be a temperature detection resistance element.
Alternatively, the state detection original 200 may be a brightness detection element, for example, the brightness detection element may be a brightness sensor.
When the state detection element 200 is a brightness detection element, the backlight driving circuit 300 may control to output a current value corresponding to a brightness signal of a backlight area of the lcd to the lcd module according to a detection result of the brightness detection element 200.
Here, the luminance detection element may specifically be a luminance detection resistance element.
Alternatively, when the state detection element 200 detects a temperature signal and/or a luminance signal, it is first necessary to convert the detected temperature signal and/or luminance signal into an electrical signal, i.e., a control signal, and transmit the electrical signal to the backlight driving circuit 300 through a connector of the liquid crystal display. The backlight driving circuit 300 outputs a current value corresponding to the electrical signal to the lcd module 100 according to the electrical signal.
Optionally, a Flexible printed circuit Board (FPC) of the lcd backlight area 101 is further disposed with a light emitting diode (not shown), the light emitting diode is disposed in the lcd module 100, and a light source position of the light emitting diode corresponds to the lcd backlight area 101.
Alternatively, the state detection element 200 may be soldered on the FPC, and when detecting a state signal, the state detection element 200 may feed back the state signal to the backlight driving circuit 300 through an LCD connector (not shown in the figure), and specifically, the state signal may feed back the state signal to the backlight driving chip on the backlight driving circuit 300, so as to control the backlight driving chip to output a maximum current corresponding to the state signal to the liquid crystal display module 100.
In the present application, the lcd backlight area 101 is disposed inside the lcd module 100 and near the edge of the lcd module 100, as shown in fig. 1, the lcd backlight area 101 is disposed at the lower edge region of the lcd module 100. Of course, the lcd backlight area 101 may also be disposed in the upper edge area, the left edge area or the right edge area of the lcd module 100.
Alternatively, the state detection element 200 may be disposed inside the lcd backlight area 101 and near the center. Thus, by disposing the state detection element 200 inside the lcd backlight area 101, the brightness of the lcd backlight area 101 and the temperature of the lcd module 100 can be accurately detected in real time.
Optionally, the apparatus further comprises: a state dividing element (not shown in the figure);
the state division element is disposed in the backlight area of the liquid crystal display, and the state division element is connected to the backlight driving circuit 300, and the state division element may be a processor in the backlight area of the liquid crystal display, and the function of the state division element may be implemented by the processor. The state division element is configured to divide the temperature interval of the temperature signal detected by the state detection element 200, or divide the luminance interval of the luminance signal detected by the state detection element 200. So as to compare the temperature signal or the electric signal corresponding to the brightness signal with the preset signal.
Optionally, the apparatus further comprises: a signal comparison element 400;
the signal comparison element 400 is disposed on the backlight driving circuit 300, and the signal comparison element 400 is electrically connected to the state dividing element. The signal comparison component 400 is used for comparing the electrical signal corresponding to the state signal divided by the state dividing component with a preset signal.
Here, the signal comparison element 400 may be specifically a signal comparator, and the state signal may be a temperature signal or a luminance signal.
As shown in fig. 2, two resistors, i.e., an R-PULL-up resistor and an R-PTC resistor, are provided between the PULL-up power supply and the ground, wherein the resistance of the R-PTC resistor changes according to the temperature change of the backlight area 101 of the liquid crystal display, so that the voltage value of the V-ADC also changes, and the generated voltage value is input to the three signal comparators 400 to obtain three control signals. Here, the three comparators have three preset intervals, which are a temperature a, a temperature B, and a temperature C, respectively, where temperature a < temperature B < temperature C. The obtained three control signals are respectively a control signal VOUT _ A corresponding to the temperature A, a control signal VOUT _ B corresponding to the temperature B and a control signal VOUT _ C corresponding to the temperature C.
Here, when the state detection element 200 detects a temperature signal of the lcd backlight area 101, the detected temperature signal is first converted into a control signal by the electrical signal converter 500, and then the control signal is compared with control signals corresponding to 3 preset divided intervals by the signal comparison element 400 to obtain a comparison result, and the preset interval corresponding to the control signal is determined according to the comparison result. For example, if the predetermined interval corresponding to the control signal is a predetermined interval a, the current value corresponding to the predetermined interval a is outputted to the lcd module 100.
Optionally, the apparatus further comprises: an adjustment element 600;
the adjusting element 600 is disposed on the backlight driving circuit 300, and the adjusting element 600 is electrically connected to the signal comparing element 400. The adjusting element 600 may specifically be a current regulator or a temperature regulator on the backlight driving circuit 300. The adjusting element 600 is configured to adjust a current value, corresponding to the electrical signal, output by the backlight driving circuit 300 to the liquid crystal display module 100 according to a comparison result of the signal comparing element 400 comparing the electrical signal corresponding to the temperature signal detected by the state detecting element 200 with a preset signal; alternatively, the adjusting element 600 is configured to adjust a current value corresponding to the electrical signal output by the backlight driving circuit 300 to the liquid crystal display module 100 according to a comparison result of the signal comparing element 400 comparing the electrical signal corresponding to the brightness signal detected by the state detecting element 200 with a preset signal.
Here, the luminance signal represents the luminance of the liquid crystal display backlight area 101.
In the present application, when the comparison result represents that the currently detected temperature signal or the electrical signal corresponding to the brightness signal is greater than or less than the preset signal interval a, the backlight driving circuit 300 may further control to output the maximum current value corresponding to the preset signal interval a to the liquid crystal display module 100.
Optionally, the apparatus further comprises: an analysis element (not shown in the figure);
the analyzing device is disposed on the backlight driving circuit 300 and electrically connected to the adjusting device 600. The analyzing element may specifically be a chip with a signal analyzing function on the backlight driving circuit 300, and the analyzing element is configured to determine a target brightness signal required by the current application according to the type information of the currently used application program; the adjusting element 600 may also adjust the current value output to the lcd module 100 according to the target brightness signal determined by the analyzing element through the analysis of the current application and the comparison result of the signal comparing element 400 comparing the electrical signal corresponding to the brightness signal detected by the state detecting element 200 with the preset signal.
Here, the current value may be a current value indicating luminance or a current value indicating temperature.
For example, the signal comparison component 400 compares the electrical signal corresponding to the luminance signal with a preset signal according to the luminance signal detected by the state detection component 200 to obtain a comparison result. For example, the comparison result indicates that the brightness of the backlight area 101 of the liquid crystal display is currently in a high brightness state. And when the analysis element determines that the current application is a video program according to the application type information of the current application, and determines that the brightness state corresponding to the video program is a medium-bright state according to the corresponding relationship between the video program and the preset brightness state, the adjustment element 600 may adjust the high-bright state of the backlight area 101 of the liquid crystal display to the medium-bright state according to the medium-bright state determined by the analysis element. This is because the video program does not require the current liquid crystal backlight area 101 to be in a high-brightness state, so that by reducing the brightness of the current liquid crystal display backlight area 101, on the one hand, power can be saved, and on the other hand, the eyes of the user can be protected.
Then, the adjusting element 600 adjusts the temperature corresponding to the high-brightness state of the backlight area 101 of the liquid crystal display to the temperature corresponding to the medium-brightness state according to the preset corresponding relationship between the brightness states and the temperature states.
Alternatively, the signal comparison element 400 compares the electrical signal corresponding to the luminance signal with a preset signal according to the luminance signal detected by the state detection element 200 to obtain a comparison result. For example, the comparison result indicates that the brightness of the backlight area 101 of the liquid crystal display is currently in a high brightness state. The analyzing element determines that the current application is a music program according to the application type information of the current application, and when the brightness state corresponding to the music program is determined to be a low-brightness state according to the corresponding relationship between the music program and the preset brightness state, the adjusting element 600 may adjust the high-brightness state of the backlight area 101 of the liquid crystal display to be a low-brightness state according to the low-brightness state determined by the analyzing element. This is because the music program does not require the current lcd backlight area 101 to be in a very bright state, and thus the power saving purpose can be achieved by reducing the brightness of the current lcd backlight area 101. Then, according to the preset corresponding relationship between each brightness state and the temperature state, the temperature corresponding to the high brightness state of the backlight area 101 of the liquid crystal display is adjusted to the temperature corresponding to the low brightness state, so that the problem that the user experience is affected due to the overhigh temperature of the backlight area on the surface of the mobile phone can be effectively avoided.
Optionally, the apparatus further comprises: signal recording element (not shown in the figure)
The signal recording element is arranged on the backlight driving circuit 300 and is electrically connected with the signal comparison element 400; the signal recording element may specifically be a signaler on the backlight driving circuit 300 having a signal recording function for recording the state signal detected by the state detecting element 200. Here, the status signal recorded by the signal recording element may be used as a historical status signal for post-conditioning the preset status signal.
For example, the signal recording element may record a first temperature signal detected by the state detection element 200 within a first preset time period, and a second temperature signal detected by the state detection element 200 within a second preset time period; the first preset time period and the second preset time period are adjacent time periods, or non-adjacent time periods set according to preset intervals.
The signal comparison component 400 may further compare the second temperature signal with the first temperature signal to obtain a second comparison result; the backlight driving circuit 300 may further control a maximum current value output to the lcd module 100 according to the second comparison result.
In this application, before outputting the current value corresponding to the electrical signal of the currently detected real-time temperature signal to the liquid crystal display module 100, the backlight driving circuit 300 may further adjust the maximum current value corresponding to the electrical signal of the currently detected real-time temperature signal output to the liquid crystal display module 100 according to the real-time temperature of the backlight area 101 of the liquid crystal display; and outputs the maximum current value to the lcd module 100 as the maximum current value corresponding to the current real-time temperature signal.
In the present application, the adjusting element 600 is further configured to adjust the preset signal according to the status signal recorded by the signal recording element and used as the historical status signal, the adjusting element 600 is disposed on the backlight driving circuit 300, and the adjusting element 600 is connected to the signal recording element.
Optionally, the apparatus further comprises: an interface conversion chip 700;
the interface conversion chip 700 is disposed on the backlight driving circuit 300, and an input end of the interface conversion chip 700 is electrically connected to the state detecting element 200; the output terminal of the interface conversion chip 700 is electrically connected to the lcd backlight area 101 of the lcd module 100.
Here, the interface conversion chip 700 may be specifically a U1110 chip.
In this application, the interface conversion chip 700 has a pin 800 for controlling the maximum current output; the pin 800 can control the backlight driving circuit 300 to output the maximum current value to the backlight area of the lcd module 100.
As shown in FIG. 3, three control signals, VOUT-C, VOUT-B, VOUT-A, are derived from the three signal comparators, by which the switching states of Q1, Q2, and Q3 can be controlled. Q1, Q2 and Q3 are MOS tubes respectively and are used for realizing a switching function.
There are resistors R6 and R5 between the pin 800, i.e., the ISET pin, and the ground, the resistance value of the ISET pin to the ground can be controlled according to the states of the three switches, the maximum current value output from the FB2 pin and the FB1 pin to the lcd backlight region 101 can be adjusted by the ISET pin according to the resistance value,
according to the temperature control device, the temperature of the LED backlight lamp area can be accurately detected in real time by arranging the temperature detection resistor in the LCD backlight area; by arranging the signal comparator, intelligently adjusting the maximum current of the LCD backlight lamp in multiple gears, and limiting the maximum current when the temperature is too high, the temperature of the backlight area on the surface of the mobile phone can be effectively reduced, so that the user experience is improved; the temperature control device is directly controlled through hardware logic, so that the temperature control device can respond quickly, and wireless equipment such as an AP (access point) is not required.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A temperature control apparatus, characterized in that the apparatus comprises:
a liquid crystal display module having a liquid crystal display backlight area;
the state detection element is used for detecting a state signal of the backlight area of the liquid crystal display, is electrically connected with the liquid crystal display module and is arranged in the backlight area of the liquid crystal display;
and the backlight driving circuit is used for controlling the current value output to the liquid crystal display module according to the detection result of the state detection element, and the backlight driving circuit is connected with the liquid crystal display module through a connector of the liquid crystal display.
2. The apparatus according to claim 1, wherein said state detecting element is a temperature detecting element;
the backlight driving circuit is a circuit for controlling the current value for outputting the characteristic temperature to the liquid crystal display module according to the detection result of the temperature detection element.
3. The apparatus of claim 1, further comprising:
and the light emitting diodes are arranged in the liquid crystal display module, and the light source positions of the light emitting diodes correspond to the backlight area of the liquid crystal display.
4. The device of claim 1, wherein the LCD backlight area is disposed inside the LCD module and near an edge of the LCD module;
the state detection element is arranged at the center of the backlight area of the liquid crystal display.
5. The apparatus of claim 1, further comprising:
and the state dividing element is used for dividing the state signal into temperature intervals or brightness intervals according to the currently detected state signal, is arranged in a backlight area of the liquid crystal display, and is connected with the backlight driving circuit.
6. The apparatus of claim 5, further comprising:
and the signal comparison element is used for comparing the temperature electric signal or the brightness electric signal corresponding to the state signal with a preset signal, the signal comparison element is arranged on the backlight drive circuit, and the signal comparison element is electrically connected with the state dividing element.
7. The apparatus of claim 6, further comprising:
and the adjusting element is used for adjusting the current value which is output to the liquid crystal display module and corresponds to the state signal according to the comparison result of the temperature electric signal or the brightness electric signal which corresponds to the state signal and the preset signal, is arranged on the backlight drive circuit, and is electrically connected with the signal comparison element.
8. The apparatus of claim 6, further comprising:
an analyzing element for determining a target luminance signal required for the current application according to the type information of the current application;
and the adjusting element is used for adjusting the current value output to the liquid crystal display module according to the comparison result of the target brightness signal, the state signal and the preset signal, the adjusting element and the analyzing element are respectively arranged on the backlight drive circuit, the analyzing element is electrically connected with the adjusting element, and the adjusting element is electrically connected with the signal comparison element.
9. The apparatus of claim 7, further comprising:
the signal recording element is used for recording the state signal, the signal recording element is arranged on the back light drive circuit, and the signal recording element is electrically connected with the signal comparison element;
and the adjusting element is used for adjusting the preset signal according to the state signal recorded by the signal recording element and used as the historical state signal, is arranged on the backlight drive circuit and is connected with the signal recording element.
10. The apparatus of claim 1, further comprising:
the interface conversion chip is arranged on the backlight drive circuit, and the input end of the interface conversion chip is electrically connected with the state detection element; the output end of the interface conversion chip is electrically connected with the liquid crystal display module;
the interface conversion chip is provided with a control interface; and controlling the maximum current value output to the liquid crystal display module by the backlight driving circuit through the control interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920237895.9U CN210110307U (en) | 2019-02-25 | 2019-02-25 | Temperature control device |
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| CN201920237895.9U CN210110307U (en) | 2019-02-25 | 2019-02-25 | Temperature control device |
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| CN210110307U true CN210110307U (en) | 2020-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112233624A (en) * | 2020-10-16 | 2021-01-15 | 上海华东汽车信息技术有限公司 | Backlight processing method, medium and device for instrument panel and vehicle |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112233624A (en) * | 2020-10-16 | 2021-01-15 | 上海华东汽车信息技术有限公司 | Backlight processing method, medium and device for instrument panel and vehicle |
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