CN104596659B - Temperature sensing circuit of display, display and operation method thereof - Google Patents

Temperature sensing circuit of display, display and operation method thereof Download PDF

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Publication number
CN104596659B
CN104596659B CN201510058107.6A CN201510058107A CN104596659B CN 104596659 B CN104596659 B CN 104596659B CN 201510058107 A CN201510058107 A CN 201510058107A CN 104596659 B CN104596659 B CN 104596659B
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module
transistor
control signal
current potential
voltage current
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CN104596659A (en
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赖丞
赖一丞
陈忠宏
林雅婷
庄锦棠
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AU Optronics Corp
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AU Optronics Corp
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Abstract

A temperature sensing circuit applied to a display, the display and an operation method thereof are provided, wherein the sensing circuit comprises a temperature sensing module, a reading module and a resetting module; the temperature sensing module is used for providing a sensing voltage potential according to the sensed temperature, the reading module is used for receiving the sensing voltage potential and determining whether to output the sensing voltage potential according to the first control signal, and the resetting module is used for receiving the second control signal and determining whether to reset the sensing voltage potential to a low voltage potential according to the second control signal.

Description

Temperature sensing circuit, display and its operating method of display
Technical field
The invention relates to a kind of temperature sensing circuit, in particular to a kind of temperature sensing applied to display Circuit and its operating method.
Background technology
Well known liquid crystal display device causes to be set to liquid crystal display device base due to that can be influenced by temperature change The gate driving circuit of plate occurs that leakage current is excessive or driving current is too low happens, and then causes to show that picture is different Often, therefore liquid crystal display device needs temperature detecting element to adjust the work of gate driving circuit to grasp Current Temperatures at any time Voltage makes liquid crystal display device that can not show image normally due to the influence that temperature changes, therefore how accurate temperature detecting element is It is a subject to detect the current temperature of substrate.
Invention content
To solve the above problems, the present invention provides a kind of temperature sensing circuit, including:
One warming module, has a first end and a second end, and the first end of the warming module is receiving one High voltage potential, the warming module according to the temperature sensed to provide a sensing voltage current potential to the second end, and the temperature Sense module be the diode of multiple concatenations or be multiple concatenations transistor, and the gate terminal electric property coupling of each transistor is each The drain end of transistor;
One read module with the warming module electric property coupling, to receive the sensing voltage current potential, and is controlled according to one first Whether signal deciding processed exports the sensing voltage current potential;And
One resetting module, and the warming module electric property coupling, to receive a second control signal, and according to second control Whether signal deciding processed by the sensing voltage current potential resets to a low voltage potential.
Above-mentioned temperature sensing circuit, the temperature sensing circuit further include:
One drive module, and the resetting module electric property coupling, to receive the first control signal and export second control Signal processed is to the resetting module, which is a phase inverter, and the first control signal and the second control signal are anti- Phase.
Above-mentioned temperature sensing circuit, the temperature sensing circuit further include:
One capacitance has a first end and a second end, the first end of the capacitance and the read module electric property coupling, should The second end of capacitance and the low voltage potential electric property coupling.
Above-mentioned temperature sensing circuit, the resetting module be a first transistor, have a first end, a second end and One gate terminal, the first end of the first transistor and the second end electric property coupling of the warming module, the first transistor The gate terminal to receive the second control signal, the second end of the first transistor to the electrical coupling of the low voltage potential It connects.
Above-mentioned temperature sensing circuit, the read module be a second transistor, have a first end, a second end and One gate terminal, the first end of the second transistor is receiving the sensing voltage current potential, the gate terminal of the second transistor To receive the first control signal, the second end of the second transistor is to the first end electric property coupling with the capacitance.
To solve the above problems, the present invention also provides a kind of display, including:
There are one substrate multiple pixels to be arranged on;
Temperature sensing circuit as described in claims 1 is set on the substrate;And
One control unit, the start to the sensing voltage current potential according to the temperature sensing circuit.
To solve the above problems, the present invention also provides a kind of operating method of temperature sensing circuit, the temperature sensing circuit There is a first end and a second end including a warming module, a read module and a resetting module, the warming module, it should Resetting module is electrically coupled between the second end and a low voltage potential of the warming module, the read module and the warming The second end electric property coupling of module, the operating method of the temperature sensing circuit include:
Using the warming module according to the temperature that senses provide a sensing voltage current potential to the warming module this second End;
The read module is made to export the sensing voltage current potential according to a first control signal;And
Make the resetting module that the sensing voltage current potential be reset to the low voltage potential according to a second control signal.
The operating method of above-mentioned temperature sensing circuit, the temperature sensing circuit further include a drive module, the temperature sense The operating method of slowdown monitoring circuit further includes:
The first control signal is received using the drive module and exports the second control signal to the resetting module, this One control signal is reverse phase with the second control signal.
The operating method of above-mentioned temperature sensing circuit, the temperature sensing circuit further include a capacitance, with the reading mould Block electric property coupling, the operating method of the temperature sensing circuit further include:
The sensing voltage current potential of read module output is stored using the capacitance.
The operating method of above-mentioned temperature sensing circuit, further includes:
Read the sensing voltage current potential for being stored in the capacitance.
Comprehensive the above, since the temperature sensing circuit embodiment of the present invention is set on the substrate in display, Temperature sensing circuit can directly detect the Current Temperatures of substrate, and the warming module of temperature sensing circuit is by the two of multiple concatenations Pole pipe is made of the transistor of multiple concatenations, therefore with higher warming sensitivity, can more accurately be detected current Temperature reduces display and happening for mistake is shown due to temperature changes, in addition, the temperature sensing circuit embodiment of the present invention It only needs that by a first control signal temperature sensing can be carried out, the convenience of temperature sensing is significantly increased, and due to this The temperature sensing circuit embodiment of invention is that the temperature of current substrate is judged using sensing voltage current potential, therefore with more relatively wide Detection temperature range.
Description of the drawings
Fig. 1 is the display schematic diagram of the temperature sensing circuit with the present invention;
Fig. 2 is the temperature sensing circuit embodiment schematic diagram of the present invention;
Fig. 3 A are the temperature sensing circuit embodiment curve graph one of the present invention;
Fig. 3 B are the temperature sensing circuit embodiment curve graph two of the present invention;
Fig. 4 is the step schematic diagram of the temperature sensing circuit operating method of the present invention.
Wherein, reference numeral:
10 substrate, 11 temperature sensing circuit
12 power control unit, 13 control unit
14 gate drivers, 15 display unit
151 pixel unit, 16 data driver
161 data line, 110 drive module
112 warming modules 114 reset module
116 read module, 300,302,304,306 step
C capacitance S1 first control signals
S2 second control signal S3 voltage control signals
Vdd high voltage potential Vss low voltage potentials
Von warming cross-pressure Vo sensing voltage current potentials
Vsens output voltage current potentials VGHThe operating voltage of gate drivers
T1, T2, T3, T4, Tn transistor
Specific embodiment
Referring to Fig. 1, Fig. 1 is the display embodiment of the temperature sensing circuit with the present invention, the display packet It is aobvious to include a substrate 10, a temperature sensing circuit 11, a power control unit 12, a control unit 13, a gate drivers 14, one Show 15 and one data driver 16 of unit.Temperature sensing circuit 11, power control unit 12, control unit 13, gate driving Device 14, display unit 15 and data driver 16 are set on substrate 10, and display unit 15 includes multiple pixel units 151, Each pixel unit 151 and 16 electric property coupling of gate drivers 14 and data driver, each pixel unit 151 is to basis Drive signal that gate drivers 14 export and open, and by multiple data lines 161 receive that data driver 16 exported it is aobvious Registration evidence.
Temperature sensing circuit 11 and 12 electric property coupling of power control unit to receive power supply, temperature sensing circuit 11 more with control 13 electric property coupling of unit processed, to the output voltage current potential Vsens that exports according to the temperature of sensing and calculate to control unit 13;Control unit 13 and 12 electric property coupling of power control unit, to be obtained according to the output voltage current potential Vsens received The Current Temperatures of substrate 10 at present provide a voltage control signal S3 to power control unit 12 further according to Current Temperatures, make electricity Source control unit 12 can be provided to the operating voltage V of gate drivers 14 according to the voltage control signal S3 adjustment receivedGH;Grid Driver 14 and 151 electric property coupling of multiple pixel units in display unit 15, to be provided according to power control unit 12 Operating voltage make multiple pixel units 151 that can be opened during correct.Since the temperature sensing circuit 11 of the present invention can Be directly arranged on substrate 10, can more directly and accurately sensing substrate 10 temperature change, make power control unit 12 can be more Accurately adjustment is provided to the operating voltage V of gate drivers 14GH, therefore gate drivers 14 can be greatly decreased because temperature influences And cause happening for multiple malfunctions of pixel units 151.
Referring to Fig. 2, Fig. 2 is 11 embodiment of temperature sensing circuit of the present invention, temperature sensing circuit 11 includes a driving Module 110, a warming module 112, one resetting module 114, a read module 116 and a capacitance C.
Drive module 110 may be, for example, a phase inverter and with resetting 114 electric property coupling of module, and drive module 110 is connecing It receives a first control signal S1 and exports a second control signal S2 and extremely reset module 114, and first control signal S1 and second It is reverse phase to control signal S2.Drive module 110 may include an a first transistor T1 and second transistor T2, the first transistor T1 has a first end, a second end and a gate terminal, and the first end of the first transistor T1 is high to receive one with gate terminal The second end of voltage potential Vdd, the first transistor T1 are then to export second control signal S2.Second transistor T2 has one First end, a second end and a gate terminal, the first end of second transistor T2 and the electrical coupling of second end of the first transistor T1 Connect, the gate terminal of second transistor T2 to receive first control signal S1, the second end of second transistor T2 to low electricity Piezoelectric position Vss electric property couplings, wherein low voltage potential Vss can be ground connection.Therefore when first control signal S1 is operating voltage Current potential, during high voltage potential Vdd as the aforementioned, second transistor T2 can be by unlatching and by the of the first end of second transistor T2 Two control signal S2 are pulled down to low voltage potential Vss, therefore export a second control signal with first control signal S1 reverse phases S2.And when first control signal S1 is low voltage potential, second transistor T2 can be closed, and the first end of second transistor T2 is then The operating voltage current potential that the second end of output the first transistor T1 is provided, thus export with first control signal S1 reverse phases the Two control signal S2.In addition, to may also be anti-grid and grid, anti-and grid etc. exportable anti-with input signal for aforementioned drive module 110 The logic gate of the output signal of phase.
112 electric property coupling of warming module resets module 114, has a first end and a second end, warming module 112 First end to receive high voltage potential Vdd, the second end of warming module 112 is then to export sensing voltage current potential Vo, And warming module 112 is concatenated by multiple transistor Tn, each transistor Tn has a first end, a second end and a grid Extremely, the first end of each transistor of gate terminal electric property coupling of each transistor Tn, warming module 112 also can be by multiple in addition Diode concatenates.When warming 112 sensing temperature of module, warming module 112 can because Current Temperatures difference and in crystalline substance There is different warming cross-pressure Von, warming module 112 is the meter using Vo=Vdd-Von between body pipe Tn strings or diode string Calculation mode obtains sensing voltage current potential Vo, and since the number of transistor or diode can be directly proportional to temperature susceplibility, warming Module 112 is formed again by concatenating multiple transistors or diode, therefore the sensing voltage current potential Vo exported can have higher temperature Spend susceptibility.
Module 114 and 110 electric property coupling of warming module 112 and drive module are reset, resetting module 114 is to receive The second control signal S2 of the output of drive module 110 simultaneously decides whether according to second control signal S2 by sensing voltage current potential Vo weights It is set to low voltage potential Vss.Resetting module 114 is a transistor T3, has a first end, a second end and a grid End, the first end of transistor T3 and the second end electric property coupling of warming module 112, the gate terminal of transistor T3 is receiving second Control signal S2, the second end of transistor T3 then to low voltage potential Vss electric property couplings.When second control signal S2 is work When making voltage potential, transistor T3 is opened, therefore the sensing voltage current potential Vo of the first end of transistor T3 can be reset as low electricity Piezoelectric position Vss, and when second control signal S2 is low voltage potential, transistor T3 is closed, therefore the first end of transistor T3 Export the sensing voltage current potential Vo sensed.
Read module 116 and 112 electric property coupling of warming module, to receive sensing voltage current potential Vo, and according to the first control Signal S1 processed decides whether to export sensing voltage current potential Vo to capacitance C.Read module 116 is a transistor T4, has one the One end, a second end and a gate terminal, the first end of transistor T4 is receiving sensing voltage current potential Vo, the grid of transistor T4 Extremely to receive first control signal S1, the second end of transistor T4 to capacitance C electric property couplings.Work as first control signal When S1 is operating voltage current potential, sensing voltage current potential Vo and is read and stored to capacitance C to open by transistor T4, and ought the When one control signal S1 is low voltage potential, transistor T4 no longer reads sensing voltage current potential Vo to close.
Capacitance C has a first end and a second end, the first end of capacitance C and the electrical coupling of second end of read module 116 It connects, second end and the low voltage potential Vss electric property couplings of capacitance C, capacitance C is to store the sense that read module 116 is exported Voltage potential Vo is surveyed, and exports sensing voltage current potential Vo after storage read module 116 stops output sensing voltage current potential Vo For output voltage current potential Vsens, and output voltage current potential Vsens exported to the control unit 13 described in Fig. 1 current to judge The temperature of substrate.
Next please also refer to Fig. 2, Fig. 3 A, Fig. 3 B and Fig. 4.Fig. 3 A are 11 embodiment of temperature sensing circuit of the present invention First control signal S1 and sensing voltage current potential Vo curve graph at different temperatures, wherein 80 DEG C of Vo@are sensing voltage Current potential Vo is 80 DEG C of voltage value in temperature, and 25 DEG C of Vo@are sensing voltage current potential Vo in the voltage value that temperature is 25 DEG C, Vo@- 25 DEG C it is sensing voltage current potential Vo in the voltage value that temperature is -25 DEG C.Fig. 3 B are the output voltage current potential Vsens of capacitance C in difference At a temperature of curve graph, 80 DEG C of Vsens@are voltage values of the output voltage current potential Vsens when temperature is 80 DEG C, 25 DEG C of Vsens@ It is to feel output voltage current potential Vsens in the voltage value that temperature is 25 DEG C ,@- 25 DEG C of Vsens exists for sense output voltage current potential Vsens Temperature is -25 DEG C of voltage value.Fig. 4 is the operating method step schematic diagram of 11 embodiment of temperature sensing circuit of the present invention.
When first control signal S1 is operating voltage current potential, i.e. marked in Fig. 3 A during A, warming module 112 feels Survey Current Temperatures and output sensing voltage current potential Vo (steps 300), transistor when first control signal S1 is operating voltage current potential T2 is opens, and second control signal S2 is close to low voltage potential Vss, and transistor T3 is closes, therefore sensing voltage current potential at this time The voltage of Vo is charged by high voltage potential Vdd and is begun to ramp up, as shown in the sensing voltage current potential Vo of A between Fig. 3 A mid-terms, not The sensing voltage current potential Vo sensed when synthermal all rises to higher voltage potential, and transistor T2 and transistor T4 at this time It opens, therefore transistor T2 outputs one have the second control signal S2 of low voltage potential, and since second control signal S2 is Low voltage potential, therefore transistor T3 is closes.At this time because transistor T4 is opens, therefore read module 116 is by sensing voltage Current potential Vo reads and stores to capacitance C (steps 302), so when output voltage current potential Vsens also with sensing voltage current potential Vo And increase, as shown in Figure 3B.Then when first control signal S1 is low voltage potential, i.e. marked in Fig. 3 A during B, it is brilliant Body pipe T2 and transistor T4 is closed, and transistor T1 outputs one have the second control signal S2 of operating voltage current potential, therefore brilliant Sensing voltage current potential Vo is reset to low voltage potential by body pipe T3 to open, such as the sensing voltage current potential Vo of B between Fig. 3 A mid-terms Shown, the sensing voltage current potential Vo under different temperatures is all reset as low voltage potential (step 304), at this time and by capacitance C institutes The output voltage current potential Vsens of storage is exported to the 13 (step 306) of control unit described in Fig. 1, makes control unit 13 can be according to this The Current Temperatures of substrate 10 are obtained, the output voltage current potential Vsens after the completion of output stored by capacitance C turns again to a low-voltage Current potential, as shown in the output voltage current potential Vsens of B between Fig. 3 B mid-terms, at the end of period B, the output voltage electricity of different temperatures The voltage potential of position Vsens all drops to corresponding low voltage potential.In addition, A and Fig. 3 B according to fig. 3, no matter in high temperature 80 DEG C or -25 DEG C of low temperature in the case of, the present invention all can export corresponding sensing voltage current potential Vo according to presently sensed temperature, because This control unit 13 can be according to the output voltage current potential Vsens received, such as the electricity of the Vsens=13.4V marked in Fig. 3 B Pressure value, to obtain the sensing result that Current Temperatures are 80 DEG C, therefore the present invention significantly has wider temperature detection range.
Comprehensive the above, since the temperature sensing circuit embodiment of the present invention is disposed on the substrate in display, because This temperature sensing circuit can directly and accurately detect the Current Temperatures of substrate, and the warming module of temperature sensing circuit is by more The diode of a concatenation is made of the transistor of multiple concatenations, therefore with higher warming sensitivity, makes the present invention's Temperature sensing circuit embodiment is more accurately examined without additionally feeling the purpose of sensitivity using elements such as amplifiers to reach a high temperature Current Temperatures are measured, display is reduced and happening for mistake is shown due to temperature changes.In addition, the temperature sensing electricity of the present invention Road embodiment only needs that by a first control signal temperature sensing can be carried out, and the convenience of temperature sensing is significantly increased. Again since the leakage current of the capacitance in low temperature is smaller, the capacitance with relatively low capacitance is in low temperature with the spirit of preferable warming Sensitivity, and the leakage current of capacitance is larger during high temperature, the capacitance with higher capacitance value is sensitive with preferable warming at high temperature Degree, therefore be intended to judge the mode of Current Temperatures using characteristic of the capacitance at different temperatures with different leakage currents, need to select can The capacitance of warming sensitivity when taking into account low temperature and high temperature, this measure can then lead to the electricity of capacitance changed to sensing temperature Capacitance is restricted, and in turn results in that the temperature that can be sensed is limited, and the temperature sensing circuit embodiment of the present invention is to utilize The sensing voltage current potential that warming module is sensed judges the temperature of current substrate, and this case is without in order to select preferable warming spirit Sensitivity and select specific capacitance, also would not be because of specific capacitance and with smaller temperature sensing range, therefore This case has more wider detection temperature range.
Although the present invention has been disclosed by way of example above, it is not intended to limit the present invention., any people in the art Member, without departing from the spirit and scope of the present invention, when can do a little change and retouching, therefore protection scope of the present invention is worked as It is subject to claims.

Claims (11)

1. a kind of temperature sensing circuit, which is characterized in that including:
One warming module, has a first end and a second end, and the first end of the warming module is high electric to receive one Piezoelectric position, the warming module according to the temperature sensed to provide a sensing voltage current potential to the second end, and the warming mould Block is the transistor of multiple concatenations, and the gate terminal electric property coupling of each transistor its drain electrode end;
One read module with the warming module electric property coupling, to receive the sensing voltage current potential, and is believed according to one first control Number decide whether to export the sensing voltage current potential, which is a transistor T4, have a first end, a second end and One gate terminal, the first end of transistor T4 to receive the sensing voltage current potential, the gate terminal of transistor T4 to Receive the first control signal, the second end of transistor T4 to a capacitance electric property coupling;And
One resetting module with the warming module electric property coupling, to receive a second control signal, and is believed according to second control Number decide whether the sensing voltage current potential resetting to a low voltage potential, which is a transistor T3, has one the One end, a second end and a gate terminal, the first end of transistor T3 and the second end electric property coupling of the warming module, The gate terminal of transistor T3 to receive the second control signal, the second end of transistor T3 to the low-voltage Current potential electric property coupling.
2. temperature sensing circuit as described in claim 1, which is characterized in that the temperature sensing circuit further includes:
One drive module with the resetting module electric property coupling, is believed to receive the first control signal and export second control Number to the resetting module, which is a phase inverter, and the first control signal and the second control signal are reverse phase.
3. temperature sensing circuit as described in claim 1, which is characterized in that the capacitance has a first end and a second end, The first end of the capacitance and the read module electric property coupling, the second end of the capacitance and the low voltage potential electric property coupling.
4. a kind of temperature sensing circuit, which is characterized in that including:
One warming module, has a first end and a second end, and the first end of the warming module is high electric to receive one Piezoelectric position, the warming module according to the temperature sensed to provide a sensing voltage current potential to the second end, and the warming mould Block is the diode of multiple concatenations;
One read module with the warming module electric property coupling, to receive the sensing voltage current potential, and is believed according to one first control Number decide whether to export the sensing voltage current potential, which is a transistor T4, have a first end, a second end and One gate terminal, the first end of transistor T4 to receive the sensing voltage current potential, the gate terminal of transistor T4 to Receive the first control signal, the second end of transistor T4 to a capacitance electric property coupling;And
One resetting module with the warming module electric property coupling, to receive a second control signal, and is believed according to second control Number decide whether the sensing voltage current potential resetting to a low voltage potential, which is a transistor T3, has one the One end, a second end and a gate terminal, the first end of transistor T3 and the second end electric property coupling of the warming module, The gate terminal of transistor T3 to receive the second control signal, the second end of transistor T3 to the low-voltage Current potential electric property coupling.
5. temperature sensing circuit as claimed in claim 4, which is characterized in that the temperature sensing circuit further includes:
One drive module with the resetting module electric property coupling, is believed to receive the first control signal and export second control Number to the resetting module, which is a phase inverter, and the first control signal and the second control signal are reverse phase.
6. temperature sensing circuit as claimed in claim 5, which is characterized in that the capacitance has a first end and a second end, The first end of the capacitance and the read module electric property coupling, the second end of the capacitance and the low voltage potential electric property coupling.
7. a kind of display, which is characterized in that including:
There are one substrate multiple pixels to be arranged on;
Temperature sensing circuit as described in claim 1 or 4 is set on the substrate;And
One control unit acts to the sensing voltage current potential according to the temperature sensing circuit.
A kind of 8. operating method for temperature sensing circuit as described in claim 1 or 4, which is characterized in that the temperature sense The operating method of slowdown monitoring circuit includes:
A sensing voltage current potential is provided to the second end of the warming module according to the temperature sensed using the warming module;
The read module is made to export the sensing voltage current potential according to a first control signal;And
Make the resetting module that the sensing voltage current potential be reset to the low voltage potential according to a second control signal.
9. the operating method of temperature sensing circuit as claimed in claim 8, which is characterized in that the temperature sensing circuit further includes One drive module, the operating method of the temperature sensing circuit further include:
The first control signal is received using the drive module and exports the second control signal to the resetting module, first control Signal processed is reverse phase with the second control signal.
10. the operating method of temperature sensing circuit as claimed in claim 8, which is characterized in that the behaviour of the temperature sensing circuit It is further included as method:
The sensing voltage current potential of read module output is stored using the capacitance.
11. the operating method of temperature sensing circuit as claimed in claim 10, which is characterized in that it is further included:
Read the sensing voltage current potential for being stored in the capacitance.
CN201510058107.6A 2014-12-09 2015-02-04 Temperature sensing circuit of display, display and operation method thereof Active CN104596659B (en)

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CN106023890B (en) * 2016-07-25 2018-06-01 京东方科技集团股份有限公司 Temperature sensing circuit and method, temperature compensation means and method and display device
CN106356031B (en) * 2016-10-10 2019-04-05 南京中电熊猫液晶显示科技有限公司 The control method of liquid crystal display device and its GOA circuit
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CN107063487B (en) 2017-06-13 2019-09-20 京东方科技集团股份有限公司 Temperature sensor, display panel and display device
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CN108831398B (en) * 2018-07-25 2020-05-05 深圳市华星光电半导体显示技术有限公司 GOA circuit and display device
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