CN115985244A - Display substrate and display device - Google Patents
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- CN115985244A CN115985244A CN202310079288.5A CN202310079288A CN115985244A CN 115985244 A CN115985244 A CN 115985244A CN 202310079288 A CN202310079288 A CN 202310079288A CN 115985244 A CN115985244 A CN 115985244A
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Abstract
The embodiment of the application provides a display substrate and a display device. The display substrate includes: the temperature sensing circuit comprises a substrate and a plurality of temperature sensing circuits positioned on one side of the substrate; each temperature sensing circuit comprises a current providing module and a temperature sensing module; the current providing module is respectively connected with the voltage input end, the voltage control end, the temperature sensing module and the detection end and is used for providing constant current for the temperature sensing module based on a first electric signal input by the voltage input end under the control of the voltage control end; and the temperature sensing module is respectively connected with the current providing module, the detection end and the reference voltage end, and is used for sensing the change of the temperature of the display substrate and converting the change of the temperature into a second electric signal to be output to the detection end. The temperature distribution can be fed back in real time through the temperature sensing module in the screen, and the problems that the local or overall temperature of the display device is increased to cause uneven brightness, reduced display quality and the like due to heating of elements such as a battery are avoided.
Description
Technical Field
The application relates to the technical field of display, in particular to a display substrate and a display device.
Background
Organic Light Emitting Diodes (OLEDs) are a new generation of display technology and are being adopted by more and more display devices. With the gradual development of the OLED display panel industry, the light emitting materials and the structural design tend to have higher efficiency, and the sensitivity of the display device to temperature is higher.
At present, the temperature rise in the display screen causes uneven brightness of the display screen, and then causes the display quality of the display screen to be reduced, so that the stability of the display quality of the display screen under certain temperature change in the screen is a problem to be solved urgently at present.
Disclosure of Invention
The application provides a display substrate and a display device aiming at the defects of the prior art, and is used for solving the technical problem that the display quality is reduced due to the fact that the temperature in a screen is increased in the prior art.
In order to solve the above problem, the embodiments of the present application mainly provide the following technical solutions:
in a first aspect, an embodiment of the present application provides a display substrate, including: the temperature sensing circuit comprises a substrate and a plurality of temperature sensing circuits positioned on one side of the substrate; each temperature sensing circuit comprises a current providing module and a temperature sensing module; the current providing module is respectively connected with the voltage input end, the voltage control end, the temperature sensing module and the detection end and is used for providing constant current for the temperature sensing module based on a first electric signal input by the voltage input end under the control of the voltage control end; the temperature sensing module is respectively connected with the current providing module, the detection end and the reference voltage end, and is used for sensing the temperature change of the display substrate, converting the temperature change into a second electric signal based on the constant current and outputting the second electric signal to the detection end.
Optionally, the display substrate further comprises a detection control module; the detection control module is respectively connected with the control signal end, the detection end and the output end and is used for outputting the second electric signal to the output end under the control of the control signal end.
Optionally, the detection control module comprises a first transistor; the control electrode of the first transistor is connected with the control signal end, the first electrode of the first transistor is connected with the detection end, and the second electrode of the first transistor is connected with the output end.
Optionally, the current providing module comprises a second transistor; the control electrode of the second transistor is connected with the voltage control end, the first electrode of the second transistor is connected with the voltage input end, and the second electrode of the second transistor is respectively connected with the detection end and the temperature sensing module.
Optionally, the temperature sensing module comprises several heat-sensitive transistors connected in series; and the control electrode of each thermosensitive transistor is connected with the first electrode of the induction transistor, the first electrode of each thermosensitive transistor is respectively connected with the second electrode of the second transistor and the detection end, and the second electrode of each thermosensitive transistor is connected with the reference voltage end.
Optionally, for adjacent said temperature sensing circuits; the number of the thermosensitive transistors included in one temperature sensing module is different from that of the thermosensitive transistors included in the other temperature sensing module; the detection end of one temperature sensing circuit and the detection end of the other temperature sensing circuit are connected with the same output end.
Optionally, the display substrate includes a driving circuit layer, a light emitting device layer, and an encapsulation layer sequentially located on one side of the substrate; the temperature sensing circuit is arranged in any one of the following modes; the temperature sensing circuit is integrated in the driving circuit layer; the temperature sensing circuit is positioned between the driving circuit layer and the light-emitting device layer; the temperature sensing circuit is positioned on one side of the packaging layer far away from the substrate; the temperature sensing circuit is located between the light emitting device layer and the encapsulation layer.
Optionally, the display substrate includes a driving circuit layer and a light emitting device layer sequentially located on one side of the substrate; the driving circuit layer includes a plurality of pixel circuits for supplying a constant current to the light emitting device layer; the pixel circuit is multiplexed as the current supply module.
Optionally, the light emitting device layer comprises a number of organic electroluminescent units; the organic electroluminescent unit is multiplexed as the temperature sensing module.
In a second aspect, an embodiment of the present application provides a display device, including: such as the display substrate of the first aspect.
The technical scheme provided by the embodiment of the application brings beneficial technical effects that:
the display substrate that this application embodiment provided, because this display substrate is including a plurality of temperature-sensing circuit that are located basement one side, each temperature-sensing circuit includes that the electric current provides module and temperature-sensing module, the electric current provides the module and can provide invariable electric current for temperature-sensing module, the temperature-sensing module can respond to the change of display substrate's temperature, and provide the invariable electric current that the module provided based on the electric current, change the temperature is converted into the second electric signal and is exported the sense terminal, the sense terminal can connect check out test set, for example, the second electric signal can be voltage signal, when temperature-sensing module detects different temperatures, the voltage size of the second electric signal of exporting the sense terminal can be different, check out test set can calculate the temperature distribution of display substrate based on the second electric signal of different voltage sizes, avoid components such as battery to generate heat and cause the local temperature rising of display screen to cause the interior display luminance inequality of screen or the whole temperature rising to cause problems such as display quality decline.
The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the embodiments of the present application will be given below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the alternative embodiments. The drawings are only for purposes of illustrating alternative embodiments and are not to be construed as limiting the embodiments of the present application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of a temperature sensing circuit according to an embodiment of the present disclosure;
fig. 2 is a specific circuit diagram of a temperature sensing circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another temperature sensing circuit according to an embodiment of the present disclosure;
FIG. 4 is a detailed circuit diagram of another temperature sensing circuit according to an embodiment of the present disclosure;
FIG. 5 is a detailed circuit diagram of another temperature sensing circuit according to an embodiment of the present disclosure;
FIG. 6 is a schematic circuit diagram of another temperature sensing circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a display substrate according to an embodiment of the present disclosure;
fig. 8 is a specific circuit diagram of another temperature sensing circuit according to an embodiment of the present disclosure.
Description of reference numerals:
1-a substrate; 2-a temperature sensing circuit; 3-a driving circuit layer; 4-a light emitting device layer; 5-packaging layer;
201-a current providing module; 202-temperature sensing module;
202 a-a first temperature sensing module; 202 b-a first temperature sensing module;
201 a-a first current providing module; 201 b-second Current providing Module
D1-detection end;
d1 a-a first detection end; d1 b-a second detection terminal.
Detailed Description
The present application is described in detail below and examples of embodiments of the present application are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements with the same or similar functionality throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
At present, the development of OLED display panels is gradually deepened, the design of light emitting materials and structures gradually tends to high efficiency, and the sensitivity of display devices to temperature is also gradually increased. The higher temperature change in the screen increases the probability of uneven display brightness and poor display quality of the display screen.
Aiming at the problems in the prior art, the embodiment of the application provides a display substrate to solve the technical problem that the display quality of the display substrate is reduced due to the fact that the temperature in a screen is increased in the prior art.
To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.
An embodiment of the present application provides a display substrate, as shown in fig. 1 to 8, the display substrate includes: the temperature sensing device comprises a substrate 1 and a plurality of temperature sensing circuits 2 positioned on one side of the substrate 1. Each temperature sensing circuit 2 includes a current providing module 201 and a temperature sensing module 202. Fig. 1 is a schematic structural diagram of a temperature sensing circuit 2 according to an embodiment of the present disclosure; as shown in fig. 1, the current providing module 201 is respectively connected to the voltage input terminal, the voltage control terminal, the temperature sensing module 202, and the detection terminal D1, and the current providing module 201 is configured to provide a constant current for the temperature sensing module 202 based on a first electrical signal input by the voltage input terminal under the control of the voltage control terminal; temperature-sensing module 202 provides module 201, sense terminal D1 and reference voltage end connection with the electric current respectively, and temperature-sensing module 202 is used for responding to the change of display substrate's temperature to provide the invariable electric current that module 201 provided based on the electric current, convert the change of temperature into the second signal of telecommunication and export sense terminal D1, sense terminal D1 passes through the output and connects check out test set.
The display substrate provided by the embodiment of the application, because this display substrate includes a plurality of temperature sensing circuit 2 that are located basement one side, each temperature sensing circuit 2 includes current provide module 201 and temperature sensing module 202, current provide module 201 can provide invariable electric current for temperature sensing module 202, temperature sensing module 202 can respond to the change of display substrate's temperature, and the invariable electric current that provides based on current provide module 201, change the temperature is converted into the second electric signal and is exported detection terminal D1, detection terminal D1 can connect check-out test set, for example, the second electric signal can be voltage signal, when temperature sensing module 202 detects different temperatures, the voltage size of the second electric signal that exports detection terminal D1 can be different, check-out test set can calculate the temperature distribution of display substrate based on the second electric signal of different voltage sizes, avoid elements such as battery to generate heat and cause that the local temperature rising of display screen causes the interior uneven luminance of screen or whole temperature rising causes problems such as display quality decline.
In a specific embodiment, as shown in fig. 2, the voltage input terminal corresponds to the input voltage Vin, the voltage control terminal corresponds to the input voltage V1, and the reference voltage terminal corresponds to the input voltage Vref, and specifically, the current providing module 201 includes a second transistor T1; the control electrode of the second transistor T1 is connected to the voltage control terminal (the terminal corresponding to the input voltage V1), the first electrode of the second transistor T1 is connected to the voltage input terminal (the terminal corresponding to the input voltage Vin), and the second electrode of the second transistor T1 is connected to the detection terminal D1 and the temperature sensing module 202, respectively.
In a specific embodiment, as shown in fig. 2, the temperature sensing module 202 includes several series-connected thermistors; the control electrode of each thermal sensitive transistor sensor is connected with the first electrode of the thermal sensitive transistor sensor; a first pole of the first thermistor sensor is connected to a second pole of the second transistor T1 and the sensing terminal D1, and a second pole of the last thermistor sensor is connected to a reference voltage terminal (a terminal corresponding to the input voltage Vref). The temperature-sensitive transistor sensor is sensitive to temperature, different threshold voltages exist along with the sensed temperature change, the voltage drop of the temperature-sensitive transistor sensor is different under the condition that the circuit provides constant current, the output end Vout outputs different voltage values, and then the temperature distribution of the display substrate can be fed back in real time.
It can be understood that Rline in fig. 2 is a line resistance in the circuit, and the specific resistance value is related to the actual process.
As shown in fig. 2, a voltage V1 is input to the voltage control terminal, and the second transistor T1 obtains a specific current, so that the second transistor T1 works in a saturation region, and it can avoid the voltage drop change of the thermistor sensor to fluctuate the current, when the temperature detected by the thermistor sensor changes, the voltage drop of the thermistor sensor changes under the same current, the detection terminal D1 obtains the voltage drop change of the thermistor sensor, and outputs the voltage drop change to the detection device through the output terminal, and the detection device can calculate the temperature change according to the voltage drop change.
In another display substrate provided in the embodiment of the present application, as shown in fig. 3, the display substrate further includes a detection control module 203; the detection control module 203 is respectively connected with the control signal end, the detection end D1 and the output end, and the detection control module 203 is used for outputting the second electric signal to the output end under the control of the control signal end.
In a specific embodiment, as shown in fig. 4, the detection control module 203 includes a first transistor T2; the control electrode of the first transistor T2 is connected to the control signal terminal (the terminal corresponding to the input voltage Vscan), the first electrode of the first transistor T2 is connected to the detection terminal D1, and the second electrode is connected to the output terminal Vout.
Specifically, the first transistor T2 may be an N-type transistor or a P-type transistor, and the first transistor T2 is taken as an example in the embodiment of the present application, when the input voltage Vscan at the control signal terminal is at a high level, the first transistor T2 is turned on, and the second electrical signal is output to the output terminal through the detection control module 203; when the input voltage Vscan of the control signal terminal is at a low level, the first transistor T2 is turned off, and the second electrical signal cannot be output to the output terminal through the detection control module 203, that is, the output terminal cannot output the second electrical signal to the detection device; the detection control module 203 can reduce the number of signal traces and channels of the signal reading chip by a line scanning manner.
In some specific embodiments, as shown in fig. 5 and fig. 6, the display substrate includes a plurality of adjacent two temperature sensing circuits, each of the two temperature sensing circuits is arranged in a similar manner, wherein the number of the thermal transistors sensors included in one temperature sensing module 202 is different from the number of the thermal transistors sensors included in another temperature sensing module 202; a detection end D1 of one of the temperature sensing circuits and a detection end D1 of the other temperature sensing circuit are connected to a same output end Vout, specifically, as shown in fig. 5, the detection end D1 of the first temperature sensing circuit (the temperature sensing circuit on the left side in the figure) is directly connected to the output end Vout, and the detection end D1 of the second temperature sensing circuit (the temperature sensing circuit on the right side in the figure) is directly connected to the output end Vout; as shown in fig. 6, a detection terminal D1 of the first temperature sensing circuit (the left temperature sensing circuit in the figure) is connected to the output terminal Vout through a first detection control module 203a, and a detection terminal D1 of the second temperature sensing circuit (the right temperature sensing circuit in the figure) is connected to the output terminal Vout through a second detection control module 203 b.
In a specific embodiment, for adjacent temperature sensing circuits, as shown in fig. 5, the number of the thermistors included in the first temperature sensing module 202a is N, and the number of the thermistors included in the second temperature sensing module 202b is N + N, where N and N are both positive integers; the temperature sensing modules comprising the two adjacent temperature sensing circuits are provided with the thermosensitive transistor sensors with different numbers, so that two paths of signals output by the output end Vout can be differentiated, the noise is reduced, the voltage drop of the thermosensitive transistor sensors can be extracted, and the temperature distribution of the display substrate can be obtained.
In a specific embodiment, for adjacent temperature sensing circuits, as shown in fig. 6, the number of the thermal sensitive transistors sensors included in the first temperature sensing module 202a is N, and the number of the thermal sensitive transistors sensors included in the second temperature sensing module 202b is N + N, where N and N are positive integers; the arrangement mode can reduce the number of channels of signal wiring and signal reading chips in a line scanning mode, and can feed back the temperature in the display substrate in real time and reduce the noise of circuit signals.
In some specific embodiments, as shown in fig. 1 to 7, the display substrate includes a driving circuit layer 3, a light emitting device layer 4, and an encapsulation layer 5 sequentially disposed at one side of a substrate 1; the temperature sensing circuit 2 is arranged in any one of the following ways:
1. the temperature sensing circuit 2 is integrated in the driving circuit layer 3;
2. the temperature sensing circuit 2 is positioned between the driving circuit layer 3 and the light emitting device layer 4;
3. the temperature sensing circuit 2 is positioned on one side of the packaging layer 5 far away from the substrate;
4. the temperature sensing circuit 2 is located between the light emitting device layer 4 and the encapsulation layer 5.
Specifically, as shown in fig. 2, the temperature sensing circuit 2 includes a second transistor T1 and a plurality of thermal sensitive transistors sensors, the second transistor T1 includes a semiconductor active layer, a source electrode, a drain electrode and a gate electrode, the semiconductor active layer of the second transistor T1 may be a polysilicon active layer, and in particular, the second transistor T1 may be formed by using the same manufacturing process as that of the thin film transistor included in the driving circuit layer 3; the thermal transistor sensor includes a semiconductor active layer, a source electrode, a drain electrode, and a gate electrode, the semiconductor active layer included in the thermal transistor sensor needs to adopt a specific oxide active layer sensitive to temperature variation, the thermal transistor sensor needs to have different threshold voltages Vth for different temperatures, and the thermal transistor sensor needs to be manufactured by a manufacturing process different from that of the thin film transistor included in the driving circuit layer 3.
It should be noted that, in the embodiment of the present application, the temperature sensing circuit 2 shown in fig. 1 to fig. 6 may be disposed on or under the screen of the entire display screen, and the specific disposing manner may be similar to that in which an external touch module is attached on or under the screen.
In some specific embodiments, the display substrate includes a driving circuit layer 3 and a light emitting device layer 4 sequentially disposed on one side of a substrate 1; the driving circuit layer 3 includes a plurality of pixel circuits for supplying a constant current to the light emitting device layer 4, and the pixel circuits are multiplexed into the current supply module 201; specifically, the pixel circuit may be a 7T1C pixel circuit as shown in fig. 8, and of course, a pixel circuit with another structure (for example, a pixel circuit of 8T 2C) may also be used, and the embodiment of the present application does not limit the specific structure of the pixel circuit as long as a constant current can be supplied to the light emitting device layer 4.
In some specific embodiments, the light emitting device layer 4 includes a number of organic electroluminescent units; specifically, as shown in fig. 8, the light emitting device layer 4 may include a plurality of OLED light emitting units, and the OLED light emitting units may be configured by using a double-layer light emitting layer structure, and the OLED light emitting units using the double-layer light emitting layer are sensitive to temperature, and when the temperature changes, the current-voltage curve changes, and have different voltages under the same current.
Specifically, as shown in FIG. 8, the voltage input corresponds to the input voltagePressure V DD 、V Data And V init The voltage control terminal includes a Gate, an EM, and a Reset, the reference voltage terminal corresponds to the input voltage Vss, the current providing module 201 includes a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, and a capacitor Cst, and the temperature sensing module 202 includes a light emitting unit OLED.
As shown in fig. 8, the control terminal of the first transistor T1 is connected to the first voltage control terminal Reset, the first electrode of the first transistor T1 is respectively connected to the first electrode of the second transistor T2, the control terminal of the third transistor T3 and one end of the capacitor Cst, and the second electrode of the first transistor T1 is connected to the first voltage input terminal (corresponding to the input voltage V) init End of (d) connection; a control end of the second transistor T2 is connected to a second voltage control end Gate, and a second pole of the second transistor T2 is connected to a first stage of the sixth transistor T6 and a first pole of the third transistor T3, respectively; a second pole of the third transistor T3 is connected to a first pole of the fourth transistor T4 and a first pole of the fifth transistor T5, respectively; the control terminal of the fourth transistor T4 is connected to the second voltage control terminal Gate, and the second pole of the fourth transistor T4 is connected to the second voltage input terminal (corresponding to the input voltage V) Date End of (d) connection; the control terminal of the fifth transistor T5 is connected to the third voltage control terminal EM, and the second pole of the fifth transistor T5 is connected to the third voltage input terminal (corresponding to the input voltage V) DD End of) a connection; a control end of the sixth transistor T6 is connected with the third voltage control end EM, and a second stage of the sixth transistor T6 is respectively connected with a first pole of the seventh transistor T7, the detection end D1 and a first pole of the light emitting unit OLED; the control terminal of the seventh transistor T7 is connected to the first voltage control terminal Reset, and the second pole of the seventh transistor T7 is connected to the first voltage input terminal (corresponding to the input voltage V) init End of) is connected.
Further, in order to reduce the number of signal traces and the number of channels of the signal reading chip and to avoid crosstalk caused by the output of the voltage signal at the detecting point D1 to the organic electroluminescent unit OLED, the display substrate further includes a detection control module 203, as shown in fig. 8, the detection control module 203 includes an eighth transistor T8, a control electrode of the eighth transistor T8 is connected to the control signal terminal (the terminal corresponding to the input voltage Vscan), a first electrode of the eighth transistor T8 is connected to the detecting terminal D1, and a second electrode is connected to the output terminal Vout.
Specifically, the eighth transistor T8 may be an N-type transistor or a P-type transistor, and in the embodiment of the present application, the eighth transistor T8 is taken as an example of a P-type transistor, when the control signal terminal input voltage Vscan is at a low level, the eighth transistor T8 is turned on, and the second electrical signal is output to the output terminal through the eighth transistor T8; when the input voltage Vscan of the control signal terminal is at a high level, the eighth transistor T8 is turned off, and the second electrical signal cannot be output to the output terminal through the eighth transistor T8, i.e., the output terminal cannot output the second electrical signal to the detection device.
According to the temperature sensing circuit, the temperature in the screen can be effectively fed back in real time by correspondingly arranging the plurality of temperature sensing circuits on the plurality of pixel points or the full pixel points in the screen.
Based on the same inventive concept, embodiments of the present application provide a display device, including the display substrate described above. Because the display device comprises the display substrate, the display device has the same beneficial technical effects as the display substrate. Therefore, the advantageous effects of the display device will not be repeated herein.
By applying the embodiment of the application, the following beneficial effects can be at least realized:
the display substrate that this application embodiment provided, because this display substrate is including a plurality of temperature-sensing circuit that are located basement one side, each temperature-sensing circuit includes that the electric current provides module and temperature-sensing module, the electric current provides the module and can provide invariable electric current for temperature-sensing module, the temperature-sensing module can respond to the change of display substrate's temperature, and provide the invariable electric current that the module provided based on the electric current, change the temperature is converted into the second electric signal and is exported the sense terminal, the sense terminal can connect check out test set, for example, the second electric signal can be voltage signal, when temperature-sensing module detects different temperatures, the voltage size of the second electric signal of exporting the sense terminal can be different, check out test set can calculate the temperature distribution of display substrate based on the second electric signal of different voltage sizes, avoid components such as battery to generate heat and cause the local temperature rising of display screen to cause the interior display luminance inequality of screen or the whole temperature rising to cause problems such as display quality decline.
Those of skill in the art will understand that various operations, methods, steps in the flow, measures, schemes discussed in this application can be alternated, modified, combined, or deleted. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, the steps, measures, and schemes in the various operations, methods, and flows disclosed in the present application in the prior art can also be alternated, modified, rearranged, decomposed, combined, or deleted.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. A display substrate, comprising: the temperature sensing circuit comprises a substrate and a plurality of temperature sensing circuits positioned on one side of the substrate;
each temperature sensing circuit comprises a current providing module and a temperature sensing module;
the current providing module is respectively connected with the voltage input end, the voltage control end, the temperature sensing module and the detection end and is used for providing constant current for the temperature sensing module based on a first electric signal input by the voltage input end under the control of the voltage control end;
the temperature sensing module is respectively connected with the current providing module, the detection end and the reference voltage end, and is used for sensing the temperature change of the display substrate, converting the temperature change into a second electric signal based on the constant current and outputting the second electric signal to the detection end.
2. The display substrate according to claim 1, further comprising a detection control module;
the detection control module is respectively connected with the control signal end, the detection end and the output end and is used for outputting the second electric signal to the output end under the control of the control signal end.
3. The display substrate according to claim 2, wherein the detection control module comprises a first transistor;
the control electrode of the first transistor is connected with the control signal end, the first electrode of the first transistor is connected with the detection end, and the second electrode of the first transistor is connected with the output end.
4. The display substrate according to claim 1 or 2, wherein the current supply module comprises a second transistor;
the control electrode of the second transistor is connected with the voltage control end, the first electrode of the second transistor is connected with the voltage input end, and the second electrode of the second transistor is respectively connected with the detection end and the temperature sensing module.
5. The display substrate of claim 4, wherein the temperature sensing module comprises a plurality of thermal sensitive transistors connected in series;
the control electrode of each thermosensitive transistor is connected with the first electrode of the induction transistor;
the first pole of the first thermosensitive transistor is connected with the second pole of the second transistor and the detection end, and the second pole of the last thermosensitive transistor is connected with the reference voltage end.
6. The display substrate according to claim 5, wherein the temperature sensing circuit is configured to sense a temperature of the adjacent substrate;
the number of the thermosensitive transistors included in one temperature sensing module is different from that of the thermosensitive transistors included in the other temperature sensing module;
the detection end of one temperature sensing circuit and the detection end of the other temperature sensing circuit are connected with the same output end.
7. The display substrate according to claim 6, comprising a driving circuit layer, a light emitting device layer and an encapsulation layer sequentially disposed on one side of the substrate;
the temperature sensing circuit is arranged in any one of the following modes;
the temperature sensing circuit is integrated in the driving circuit layer;
the temperature sensing circuit is positioned between the driving circuit layer and the light-emitting device layer;
the temperature sensing circuit is positioned on one side of the packaging layer far away from the substrate;
the temperature sensing circuit is located between the light emitting device layer and the encapsulation layer.
8. The display substrate according to claim 2, comprising a driving circuit layer and a light emitting device layer sequentially disposed on one side of the substrate;
the driving circuit layer comprises a plurality of pixel circuits for providing a constant current to the light emitting device layer;
the pixel circuit is multiplexed as the current supply module.
9. The display substrate of claim 8, wherein the light emitting device layer comprises a plurality of organic electroluminescent units;
the organic electroluminescent unit is multiplexed as the temperature sensing module.
10. A display device comprising the display substrate according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310079288.5A CN115985244A (en) | 2023-01-17 | 2023-01-17 | Display substrate and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310079288.5A CN115985244A (en) | 2023-01-17 | 2023-01-17 | Display substrate and display device |
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| CN115985244A true CN115985244A (en) | 2023-04-18 |
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| CN202310079288.5A Pending CN115985244A (en) | 2023-01-17 | 2023-01-17 | Display substrate and display device |
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| CN (1) | CN115985244A (en) |
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