CN107895565A - A kind of liquid crystal display and its excess temperature protection method - Google Patents
A kind of liquid crystal display and its excess temperature protection method Download PDFInfo
- Publication number
- CN107895565A CN107895565A CN201711153664.1A CN201711153664A CN107895565A CN 107895565 A CN107895565 A CN 107895565A CN 201711153664 A CN201711153664 A CN 201711153664A CN 107895565 A CN107895565 A CN 107895565A
- Authority
- CN
- China
- Prior art keywords
- integrated circuit
- temperature value
- temperature
- detection period
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims description 87
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000010354 integration Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
- G09G2330/045—Protection against panel overheating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a kind of liquid crystal display and excess temperature protection method; liquid crystal display includes at least the first integrated circuit and at least one second integrated circuit; first integrated circuit and the second integrated circuit are connected to same data/address bus, wherein the first integrated circuit includes temperature value read module, temperature gap computing module, determination module and control module.The present invention also provides a kind of excess temperature protection method of liquid crystal display; the liquid crystal display and its excess temperature protection method of the present invention; the universal hardware circuit for being applied to various integrated circuits or component and forming, effectively and timely can detect and control temperature change during integrated circuit operation.
Description
Technical Field
The invention relates to the fields of circuits, over-temperature protection and the like, in particular to a liquid crystal display and an over-temperature protection method thereof.
Background
In the present day, the size of the panel is getting larger and heavier along with the load, in this case, the temperature problem of the integrated circuit such as a pulse width modulation circuit (PWM IC), a programmable Gamma buffer circuit (P-Gamma IC), a level shift circuit (level shift IC) and even a timing control circuit (TCON IC) is getting more and more serious, and the current over-temperature protection method is to turn off the output after the temperature reaches a certain degree until the temperature drops to a safe value and then perform normal output.
The protection cannot detect the temperature change in real time, and the temperature may rise sharply under the condition of abnormal output, so that the integrated circuit reaches a high-temperature state, but the purpose of over-temperature protection cannot be achieved, so that various integrated circuits or products always work under a dangerous condition, and under the condition, the protection effect of the existing over-temperature protection method is poor.
Disclosure of Invention
The present invention provides a liquid crystal display and an over-temperature protection method thereof, so as to solve the technical problems that the over-temperature protection method in the prior art cannot detect the change of temperature in real time and has a poor protection effect.
In order to solve the above technical problem, the present invention provides a liquid crystal display, including a first integrated circuit and at least one second integrated circuit, wherein the first integrated circuit and the second integrated circuit are connected to a same data bus; wherein the first integrated circuit comprises:
the temperature value reading module is used for reading the temperature value of the second integrated circuit in the current detection period through the data bus;
the temperature difference value calculating module is used for calculating the temperature difference value between the temperature value of the second integrated circuit in the current detection period and the temperature value of the second integrated circuit in the previous detection period;
the judging module is used for judging whether the temperature difference value is larger than or equal to a preset threshold value or not;
and the control module is used for sending a first control instruction to the second integrated circuit when the temperature difference value is greater than or equal to a preset threshold value so as to power off the second integrated circuit.
In a preferred embodiment of the present invention, the control module is further configured to send a second control instruction to the second integrated circuit when the temperature difference is smaller than a preset threshold, so that the second integrated circuit resumes power supply.
In a preferred embodiment of the present invention, the second integrated circuit includes:
the temperature value acquisition module is used for acquiring the temperature value of the second integrated circuit in the current detection period; and
and the storage module is used for storing the temperature value of the current detection period.
In a preferred embodiment of the present invention, the second integrated circuit has a detection point therein; the temperature value acquisition module includes:
the voltage detection unit is used for detecting the voltage of the detection point in the current detection period;
the temperature value calculating unit is used for calculating the temperature value of the second integrated circuit in the current detection period according to the voltage of the detection point; and
the temperature value conversion unit is used for converting the temperature value of the second integrated circuit in the current detection period into a digital signal format;
the temperature value stored by the storage module is a temperature value in a digital signal format.
In a preferred embodiment of the present invention, the data bus is an I2C bus; the first integration is a time sequence control circuit; the second integrated circuit is a pulse width modulation circuit, a programmable gamma buffer circuit or a level conversion circuit.
In order to solve the above technical problem, the present invention further provides an over-temperature protection method for a liquid crystal display, where the liquid crystal display includes a first integrated circuit and at least one second integrated circuit, and the first integrated circuit and the second integrated circuit are connected to a same data bus; wherein the over-temperature protection method comprises the following steps;
a temperature value reading module of the first integrated circuit reads a temperature value of a second integrated circuit in a current detection period through the data bus;
the temperature difference value calculation module of the first integrated circuit calculates the temperature difference value between the temperature value of the second integrated circuit in the current detection period and the temperature value of the second integrated circuit in the previous detection period;
the judging module of the first integrated circuit judges whether the temperature difference value is larger than or equal to a preset threshold value;
and when the temperature difference value is greater than or equal to a preset threshold value, the control module of the first integrated circuit sends a first control instruction to the second integrated circuit so as to power off the second integrated circuit.
In a preferred embodiment of the present invention, the over-temperature protection method further includes the following steps: and when the temperature difference value is smaller than a preset threshold value, the control module of the first integrated circuit sends a second control instruction to the second integrated circuit so as to enable the second integrated circuit to recover power supply.
In a preferred embodiment of the present invention, before the step of reading the temperature value of the current detection cycle of the second integrated circuit through the data bus by the temperature value reading unit of the first integrated circuit, the method further includes:
a temperature value acquisition module of the second integrated circuit acquires a temperature value of the second integrated circuit in a current detection period; and
and the storage module of the second integrated circuit stores the temperature value of the current detection period.
In a preferred embodiment of the present invention, a detection point is disposed in the second integrated circuit, and the step of acquiring the temperature value of the second integrated circuit in the current detection period by the temperature value acquisition module of the second integrated circuit includes:
a voltage detection unit of the temperature value acquisition module detects the voltage of the detection point in the current detection period;
a temperature value calculating unit of the temperature value acquisition module calculates a temperature value of the second integrated circuit in the current detection period according to the voltage of the detection point;
a temperature value conversion unit of the temperature value calculation unit converts the temperature value of the second integrated circuit in a detection period into a digital signal format;
the temperature value stored by the storage module is a temperature value in a digital signal format.
In a preferred embodiment of the present invention, the current detection period is a preset signal acquisition period, which is a time interval between two consecutive voltage signal acquisitions at a detection point.
The invention has the advantages that: the liquid crystal display and the over-temperature protection method thereof are generally suitable for hardware circuits formed by various integrated circuits or components, can effectively and timely detect and control the temperature change of the integrated circuits during operation, have simple structures, and can effectively and timely realize temperature control so that the integrated circuits and the like can operate in a relatively safe state.
Drawings
The invention is further explained below with reference to the figures and examples.
FIG. 1 is a schematic diagram of a unit of an integrated circuit in a liquid crystal display according to an embodiment of the invention.
Fig. 2 is a schematic diagram of a temperature value acquisition module according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of detecting points in an LCD according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating an over-temperature protection method for an LCD according to an embodiment of the present invention.
Fig. 5 is a flowchart of a temperature value collecting step of an over-temperature protection method for a liquid crystal display according to an embodiment of the invention.
Wherein,
1 a time sequence control circuit; 2 a pulse width modulation circuit;
3 programmable gamma buffer circuit; 4 level shift circuit;
21. 31, 41 temperature value acquisition module
22. 32, 42 memory module
51 detection point
52 voltage detection unit
53 temperature value calculation unit
54 temperature value conversion unit
Detailed Description
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced.
As shown in fig. 1 and 2, the present embodiment provides a liquid crystal display including a first integrated circuit and at least one second integrated circuit, the first integrated circuit and the second integrated circuit being connected to the same data bus.
In the present embodiment, the first integrated circuit can be the timing control circuit 1, and the second integrated circuit can be the pulse width modulation circuit 2, the programmable gamma buffer circuit 3, and the level conversion circuit 4.
The first integrated circuit and the second integrated circuit are connected to the same data bus, I2C. The first integrated circuit includes a temperature value reading module 15, a temperature difference value calculating module 14, a determining module 13, and a control module 12.
The temperature value reading module 15 is used for reading the temperature value of the second integrated circuit in the current detection cycle through the data bus.
The temperature difference calculation module 14 is configured to calculate a temperature difference between the temperature value of the second integrated circuit in the current detection period and the temperature value of the second integrated circuit in the previous detection period.
The determination module 13 is configured to determine whether the temperature difference is greater than or equal to a preset threshold.
The control module 12 is configured to determine that the integrated circuit is abnormally heated in the period when the temperature difference is greater than or equal to a preset threshold, and send a first control instruction to the second integrated circuit to power off the second integrated circuit; and when the temperature difference is smaller than the preset threshold value, judging that the temperature of the integrated circuit is normal, and sending a second control instruction to the second integrated circuit to enable the second integrated circuit to recover power supply.
The second integrated circuit comprises a temperature value acquisition module 21, 31, 41 and a memory module 22, 32, 42. The temperature value acquisition modules 21, 31 and 41 are used for acquiring the temperature value of the second integrated circuit in the current detection period; the storage module 22, 32, 42 is used for storing the temperature value of the current detection period.
As shown in fig. 2, specifically, the temperature value collecting module of the second integrated circuit includes a detecting point 51, a voltage detecting unit 52, a temperature value calculating unit 53 and a temperature value converting unit 54. The detection point 51 is arranged in the second integrated circuit; the voltage detection unit 52 is used for detecting the voltage of the detection point in the current period; the temperature value calculating unit 53 is used for calculating the temperature value of the second integrated circuit in the current detection period according to the voltage of the detection point; the temperature value converting unit 54 is used to convert the temperature value of the second integrated circuit in the current detection period into a digital signal format. The storage module is used for storing the temperature value in the form of digital signals. The detection period is a preset signal acquisition period, which is a time interval between two consecutive voltage signal acquisitions at a detection point, and the detection period may be in units of "seconds" or "minutes", such as a period of 5 seconds or a period of one minute, or the detection period is set according to the signal period of the I2C bus. The detection point 51 may be disposed at one end of a ground-near resistor in the second integrated circuit, as shown in FIG. 3.
The period of the first integrated circuit reading the digital signal is consistent with the preset detection period, and may not be consistent. For convenience of control, in the embodiment, the period of the first integrated circuit for reading the digital signal is consistent with the preset detection period.
As shown in fig. 4 and 5, the method for protecting an lcd from over-temperature includes steps S10-S14.
And step S10, a temperature value acquisition step, wherein a temperature value acquisition module of each second integrated circuit acquires the temperature value of each second integrated circuit in the current detection period and stores the temperature value to the second integrated circuit. The temperature value acquisition step comprises:
step S101, voltage detection, wherein a voltage detection unit of the temperature value acquisition module detects the voltage of a detection point in the integrated circuit in the current detection period.
Step S102, a temperature value calculating step, wherein a temperature value calculating unit of the temperature value collecting module calculates a temperature value of the second integrated circuit in the current detection period according to the voltage of the detection point.
Step S103, a temperature value conversion step, in which a temperature value conversion unit of the temperature value acquisition module converts the temperature value of the second integrated circuit in the current detection period into a digital signal format.
Step S104, a temperature value storage step, wherein the storage module stores the temperature value into the second integrated circuit in a digital signal form.
Step S11, temperature value reading step: and the temperature value reading module of the first integrated circuit reads the temperature value of the second integrated circuit in the current detection period through the data bus.
Step S12, calculating a temperature difference value, wherein a temperature difference value calculating module of the first integrated circuit calculates the temperature difference value of the temperature value of the second integrated circuit in the current detection period and the temperature value of the second integrated circuit in the previous detection period; step S12 includes calculating the difference between the digital signals of two previous and next cycles, i.e. the difference obtained by subtracting the digital signal of the previous cycle from the digital signal of the next cycle. The preset threshold value set in the present embodiment is generally set to 0, and may be set to a range of values.
Step S13, a temperature rise abnormity judging step, wherein a judging module of the first integrated circuit compares the temperature difference value with a preset threshold value, and if the temperature difference value is larger than or equal to the preset threshold value, the temperature rise abnormity of the integrated circuit in the period is judged; and if the temperature difference is smaller than the preset threshold value, judging that the temperature of the integrated circuit is normal. Step S13 includes comparing the difference with a preset value, determining whether the digital signal in the next cycle is abnormal, and generating a determination result. If the preset threshold value is 0, judging whether the difference value is greater than or equal to 0, if so, judging that the digital signal of the backward shift period is an abnormal digital signal, and entering the control step; if the difference is smaller than 0, it is determined that the digital signal of the backward period is a normal digital signal, and the step S10 is returned to continue the detection. Of course, in this embodiment, if the preset threshold is a range, and if the preset threshold interval is [ a, B ], it is determined whether the difference is within the [ a, B ], and if so, it is determined as a normal digital signal, and the process returns to step S10; if not, the abnormal digital signal is judged, and the fact that the abnormality caused by the temperature rise occurs in the operation of the second integrated circuit in the period is proved.
Step S14, switching on and off the integrated circuit, wherein when the temperature of the second integrated circuit rises abnormally in any period, the control module of the first integrated circuit cuts off the power of the integrated circuit through a data bus; when the temperature of the second integrated circuit is normal in any period, the control module of the first integrated circuit enables the second integrated circuit to recover power supply through the data bus. Step S14 includes generating a control signal according to the determination result to control the second integrated circuit corresponding to the digital signal to continue to be powered on or powered off. When the digital signal is judged to be the normal digital signal, the control signal is a continuous conducting signal or the control signal is not sent to the second integrated circuit. When the abnormal digital signal is determined, the control signal is a shutdown signal, and at this time, the timing control circuit sends the control signal to the second integrated circuit through the I2C bus, so as to shut down the abnormal second integrated circuit until the second integrated circuit is powered on again.
The liquid crystal display and the over-temperature protection method thereof are generally suitable for hardware circuits formed by various integrated circuits or components, can effectively and timely detect and control the temperature change of the integrated circuits during operation, have simple structures, and can effectively and timely realize temperature control so that the integrated circuits and the like can operate in a relatively safe state.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A liquid crystal display comprises a first integrated circuit and at least one second integrated circuit, wherein the first integrated circuit and the second integrated circuit are connected to the same data bus; wherein the first integrated circuit comprises:
the temperature value reading module is used for reading the temperature value of the second integrated circuit in the current detection period through the data bus;
the temperature difference value calculating module is used for calculating the temperature difference value between the temperature value of the second integrated circuit in the current detection period and the temperature value of the second integrated circuit in the previous detection period;
the judging module is used for judging whether the temperature difference value is larger than or equal to a preset threshold value or not; and
and the control module is used for sending a first control instruction to the second integrated circuit when the temperature difference value is greater than or equal to a preset threshold value so as to power off the second integrated circuit.
2. The lcd of claim 1, wherein the control module is further configured to send a second control command to the second ic to restore power to the second ic when the temperature difference is smaller than a preset threshold.
3. The liquid crystal display of claim 1, wherein the second integrated circuit comprises:
the temperature value acquisition module is used for acquiring the temperature value of the second integrated circuit in the current detection period; and
and the storage module is used for storing the temperature value of the current detection period.
4. The liquid crystal display of claim 2, wherein the second integrated circuit has a sensing point disposed therein; the temperature value acquisition module includes:
the voltage detection unit is used for detecting the voltage of the detection point in the current detection period;
the temperature value calculating unit is used for calculating the temperature value of the second integrated circuit in the current detection period according to the voltage of the detection point; and
the temperature value conversion unit is used for converting the temperature value of the second integrated circuit in the current detection period into a digital signal format;
the temperature value stored by the storage module is a temperature value in a digital signal format.
5. The liquid crystal display of any of claims 1-4, wherein the data bus is an I2C bus; the first integration is a time sequence control circuit; the second integrated circuit is a pulse width modulation circuit, a programmable gamma buffer circuit or a level conversion circuit.
6. The over-temperature protection method of the liquid crystal display comprises a first integrated circuit and at least one second integrated circuit, wherein the first integrated circuit and the second integrated circuit are connected to the same data bus; the method is characterized by comprising the following steps of;
a temperature value reading module of the first integrated circuit reads a temperature value of a second integrated circuit in a current detection period through the data bus;
the temperature difference value calculation module of the first integrated circuit calculates the temperature difference value between the temperature value of the second integrated circuit in the current detection period and the temperature value of the second integrated circuit in the previous detection period;
the judging module of the first integrated circuit judges whether the temperature difference value is larger than or equal to a preset threshold value;
and when the temperature difference value is greater than or equal to a preset threshold value, the control module of the first integrated circuit sends a first control instruction to the second integrated circuit so as to power off the second integrated circuit.
7. The over-temperature protection method of the liquid crystal display according to claim 6, further comprising the steps of:
and when the temperature difference value is smaller than a preset threshold value, the control module of the first integrated circuit sends a second control instruction to the second integrated circuit so as to enable the second integrated circuit to recover power supply.
8. The over-temperature protection method of claim 6, wherein before the step of the temperature value reading unit of the first integrated circuit reading the temperature value of the second integrated circuit in the current detection period through the data bus, the method further comprises:
a temperature value acquisition module of the second integrated circuit acquires a temperature value of the second integrated circuit in a current detection period; and
and the storage module of the second integrated circuit stores the temperature value of the current detection period.
9. The method according to claim 7, wherein a detection point is disposed in the second ic, and the step of the temperature value acquisition module of the second ic acquiring the temperature value of the second ic in the current detection period comprises:
a voltage detection unit of the temperature value acquisition module detects the voltage of the detection point in the current detection period;
a temperature value calculating unit of the temperature value acquisition module calculates a temperature value of the second integrated circuit in the current detection period according to the voltage of the detection point;
a temperature value conversion unit of the temperature value calculation unit converts the temperature value of the second integrated circuit in a detection period into a digital signal format;
the temperature value stored by the storage module is a temperature value in a digital signal format.
10. The method of claim 9, wherein the current detection period is a predetermined signal acquisition period, which is a time interval between two consecutive voltage signal acquisitions at a detection point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711153664.1A CN107895565A (en) | 2017-11-20 | 2017-11-20 | A kind of liquid crystal display and its excess temperature protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711153664.1A CN107895565A (en) | 2017-11-20 | 2017-11-20 | A kind of liquid crystal display and its excess temperature protection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107895565A true CN107895565A (en) | 2018-04-10 |
Family
ID=61805544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711153664.1A Pending CN107895565A (en) | 2017-11-20 | 2017-11-20 | A kind of liquid crystal display and its excess temperature protection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107895565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109801580A (en) * | 2018-12-24 | 2019-05-24 | 惠科股份有限公司 | Display panel, overcurrent protection method thereof, and computer-readable storage medium |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0924683A2 (en) * | 1997-12-19 | 1999-06-23 | GRUNDIG Aktiengesellschaft | Device for preventing overheating of a plasma display panel |
| CN101587687A (en) * | 2008-05-22 | 2009-11-25 | 比亚迪股份有限公司 | Temperature-detecting device, method and LCD drive g device |
| US20100148702A1 (en) * | 2008-12-17 | 2010-06-17 | Mitac Technology Corp. | Liquid crystal display and overheat protection method thereof |
| CN101980029A (en) * | 2010-09-14 | 2011-02-23 | 海洋王照明科技股份有限公司 | Voltage sampling method and device |
| CN102968961A (en) * | 2012-11-15 | 2013-03-13 | 京东方科技集团股份有限公司 | Control method, backlight control circuit, liquid crystal display (LCD) panel and LCD |
| CN103365259A (en) * | 2012-04-10 | 2013-10-23 | 泰科电子(上海)有限公司 | Control circuit module, electrical equipment and modulation and demodulation device |
| CN103714786A (en) * | 2012-10-01 | 2014-04-09 | 奕力科技股份有限公司 | Panel driving circuit and overheat protection device |
| CN104282276A (en) * | 2013-07-01 | 2015-01-14 | 联咏科技股份有限公司 | Display device and source electrode driver thereof |
| CN106707590A (en) * | 2017-02-27 | 2017-05-24 | 深圳市华星光电技术有限公司 | Display panel over-temperature protection system and display panel over-temperature protection method |
| CN206430822U (en) * | 2016-11-17 | 2017-08-22 | 山西潞安煤基合成油有限公司 | A kind of temperature alarm circuit of anti-erroneous judgement |
-
2017
- 2017-11-20 CN CN201711153664.1A patent/CN107895565A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0924683A2 (en) * | 1997-12-19 | 1999-06-23 | GRUNDIG Aktiengesellschaft | Device for preventing overheating of a plasma display panel |
| CN101587687A (en) * | 2008-05-22 | 2009-11-25 | 比亚迪股份有限公司 | Temperature-detecting device, method and LCD drive g device |
| US20100148702A1 (en) * | 2008-12-17 | 2010-06-17 | Mitac Technology Corp. | Liquid crystal display and overheat protection method thereof |
| CN101980029A (en) * | 2010-09-14 | 2011-02-23 | 海洋王照明科技股份有限公司 | Voltage sampling method and device |
| CN103365259A (en) * | 2012-04-10 | 2013-10-23 | 泰科电子(上海)有限公司 | Control circuit module, electrical equipment and modulation and demodulation device |
| CN103714786A (en) * | 2012-10-01 | 2014-04-09 | 奕力科技股份有限公司 | Panel driving circuit and overheat protection device |
| CN102968961A (en) * | 2012-11-15 | 2013-03-13 | 京东方科技集团股份有限公司 | Control method, backlight control circuit, liquid crystal display (LCD) panel and LCD |
| CN104282276A (en) * | 2013-07-01 | 2015-01-14 | 联咏科技股份有限公司 | Display device and source electrode driver thereof |
| CN206430822U (en) * | 2016-11-17 | 2017-08-22 | 山西潞安煤基合成油有限公司 | A kind of temperature alarm circuit of anti-erroneous judgement |
| CN106707590A (en) * | 2017-02-27 | 2017-05-24 | 深圳市华星光电技术有限公司 | Display panel over-temperature protection system and display panel over-temperature protection method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109801580A (en) * | 2018-12-24 | 2019-05-24 | 惠科股份有限公司 | Display panel, overcurrent protection method thereof, and computer-readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1930737B1 (en) | Insulating resistance detection apparatus | |
| CN108010497A (en) | A kind of liquid crystal display and its over-current protection method | |
| JP6279192B1 (en) | Inverter device and abnormality detection method for inverter device | |
| CN203261291U (en) | Motor drive device | |
| EP2144072A2 (en) | Temperature monitoring in uninterruptible power supply systems using synthetic loading | |
| EP2611013B1 (en) | Apparatus and method for detecting failure of switching device in inverter | |
| KR100962855B1 (en) | Error detection apparatus and method for cable and connector of battery-inverter | |
| CN101387668A (en) | Health monitoring for power converter capacitors | |
| CN101387691A (en) | Health monitoring for power converter components | |
| JP2004070913A (en) | Fault detection method, fault detection apparatus, and temperature controller | |
| KR102089915B1 (en) | Power conversion device with discharge function | |
| US20170038418A1 (en) | Method for monitoring dc link capacitance in power converters | |
| EP2922193A1 (en) | Power conversion apparatus and control method for power conversion apparatus | |
| CN104898080A (en) | Detection of stuck in range sensor and method | |
| CN203368336U (en) | Frequency converter | |
| CN107895565A (en) | A kind of liquid crystal display and its excess temperature protection method | |
| US20160077161A1 (en) | Method for improved diagnostic in determining and preventing inverter faults | |
| CN203250010U (en) | Detection equipment of UPS device battery state | |
| EP3012953A1 (en) | Method of controlling inverter | |
| EP2439546A1 (en) | A method of detecting an overcurrent in a triac | |
| EP3883078A1 (en) | Threshold detection systems | |
| CN104977479A (en) | Three-phase power state detection device and method and motor system | |
| JP4687086B2 (en) | Power converter test apparatus and test method | |
| JP6340913B2 (en) | Control apparatus and control method | |
| JP2017116480A (en) | Watthour meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180410 |