CN113884440A - Optical humidity detection assembly and optical humidity detection device - Google Patents
Optical humidity detection assembly and optical humidity detection device Download PDFInfo
- Publication number
- CN113884440A CN113884440A CN202111149681.4A CN202111149681A CN113884440A CN 113884440 A CN113884440 A CN 113884440A CN 202111149681 A CN202111149681 A CN 202111149681A CN 113884440 A CN113884440 A CN 113884440A
- Authority
- CN
- China
- Prior art keywords
- layer
- light
- humidity
- light emitting
- optical
- 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
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
- G01N21/61—Non-dispersive gas analysers
Abstract
The invention provides an optical humidity detection assembly and an optical humidity detection device. The optical humidity detection assembly includes: a substrate; a light emitting part disposed on one surface of the substrate, the light emitting part including a light emitting part and a display part; a moisture absorption part arranged on a surface of the light emitting part away from the substrate, the moisture absorption part including a moisture sensitive material layer; the photoelectric detection part is arranged on one side, away from the light emitting part, of the moisture absorption part and comprises a photoresistance layer. From this, the luminous part of luminous component can regard as the light source, and its light that sends shines photoelectric detection part behind moisture absorption part, and its luminousness can change after moisture in the moisture absorption part absorption environment, and the light intensity who shines photoelectric detection part can corresponding change for the resistance of photoresistance layer changes, measures the electric current through the photoresistance layer, can derive the humidity in the environment, and, can show through the display part of luminous component.
Description
Technical Field
The invention relates to the field of optical humidity sensors, in particular to an optical humidity detection assembly and an optical humidity detection device.
Background
The humidity sensitive material is a material which changes its own physical quantity after absorbing moisture in the air, and is a core part of the optical humidity sensor, and directly determines the performance of the optical humidity sensor. When the relative humidity in the environment rises, water molecules can be adsorbed on the humidity-sensitive material film, after the humidity-sensitive material film adsorbs the water molecules, the adsorbed water molecules can generate physical effects such as scattering and absorption on light beams irradiating the humidity-sensitive material film, so that the change of optical signals is caused, namely the light intensity of the humidity-sensitive material film is changed, when light rays with different intensities irradiate the photoresistor material, the resistance of the photoresistor material can be correspondingly changed, and the relative humidity in the environment can be obtained by testing the current passing through the photoresistor material layer.
The current optical humidity detection assembly and optical humidity detection device still need to be improved.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
after the moisture-sensitive material adsorbs water molecules, the light transmittance of the moisture-sensitive material is changed, and when the amount of adsorbed water molecules is changed, the light transmittance of the moisture-sensitive material is also changed, for example, a titanium dioxide film, and the light transmittance of the titanium dioxide film is correspondingly reduced along with the increase of the water adsorption of the film; the photoresistor material has the function of photoelectric signal conversion, the working principle is based on the internal photoelectric effect (the internal photoelectric effect is one of the photoelectric effects, and the change of the electrochemical properties of substances, such as the change of resistance, is caused mainly due to the action of a photon), the resistance value of the photoresistor material is lower as the illumination intensity is higher, the resistance value of the photoresistor material is rapidly reduced, the bright resistance value can be lower than 1K omega, and the photoresistor material is in a high-resistance state when no illumination exists, and the dark resistance can generally reach 1.5M omega. The inventors have found that when light transmitted through the moisture-sensitive material is irradiated to the photoresistive material, the resistance of the photoresistive material is changed, humidity in the environment can be obtained by measuring current flowing through the photoresistive material, and the light emitting means can be disposed such that a part thereof serves as a light source for supplying light to the moisture-sensitive material and another part thereof serves to display the measured humidity of the environment.
In view of the above, in one aspect of the present invention, there is provided an optical humidity detection assembly including: a substrate; a light emitting part disposed on one surface of the substrate, the light emitting part including a light emitting part and a display part; a moisture absorbing member provided on a surface of the light emitting portion of the light emitting member away from the substrate, the moisture absorbing member including a moisture sensitive material layer; the photoelectric detection part is arranged on one side, far away from the light-emitting part, of the moisture absorption part and comprises a photoresistance layer. From this, the luminous part of luminous component can regard as the light source, and the light that its sent shines photoelectric detection part behind moisture absorption part, and its luminousness can change after moisture in the moisture absorption part absorption environment, and the light intensity who shines photoelectric detection part can corresponding change for the resistance of photoresistance layer changes, and then makes the current through the photoresistance layer change, measures the current through the photoresistance layer, can derive the humidity in the environment, and, can show through the display part of luminous component.
According to an embodiment of the present invention, the light emitting part includes: a first electrode layer disposed on a surface of the substrate; the light-emitting layer is arranged on one side, far away from the substrate, of the first electrode layer; the second electrode layer is arranged on one side, far away from the first electrode layer, of the light-emitting layer; an encapsulation layer encapsulating the first electrode layer, the light emitting layer, and the second electrode layer; the absorbent member includes: a first light-transmitting layer provided on a surface of the light-emitting portion away from the substrate; the humidity-sensitive material layer is arranged on one side of the first light-transmitting layer away from the light-emitting part; a second light-transmitting layer provided on a side of the humidity-sensitive material layer away from the light-emitting portion; the photodetecting unit includes: a transparent electrode layer provided on a surface of the moisture absorbing member away from the substrate; the photoresistor layer is arranged on one side of the transparent electrode layer, which is far away from the moisture absorption part, and has a photoelectric signal conversion function; and the opaque electrode layer is arranged on one side of the photoresistor layer, which is far away from the moisture absorption part.
According to an embodiment of the invention, the light emitting component is a red light emitting component.
According to an embodiment of the present invention, the first light-transmitting layer and the second light-transmitting layer are each independently an inorganic thin film or a polymer thin film.
According to the embodiment of the invention, the humidity-sensitive material layer is a titanium dioxide thin film, and the thickness of the humidity-sensitive material layer is 150-250 nanometers.
According to the embodiment of the invention, the material of the photoresistor layer is cadmium sulfide or cadmium selenide.
According to an embodiment of the invention, the opaque electrode layer is a laminated structure of an indium tin oxide layer and a silver layer, wherein the indium tin oxide layer is arranged adjacent to the photoresistor layer.
According to an embodiment of the present invention, the optical humidity detection assembly further includes a sensitive current meter and a power supply, the sensitive current meter is electrically connected to the transparent electrode layer and the opaque electrode layer respectively and is configured to detect a current passing through the photoresistor layer, and the power supply supplies power to the optical humidity detection assembly.
According to an embodiment of the invention, definition I0Is the indication of the sensitive ammeter at standard relative humidity, ItIs the indication number of a sensitive ammeter when the relative humidity in the environment is t percent RH,. DELTA.I/I0Is the relative change of current, where Δ I ═ I0-It，△I/I0The value of (a) is in one-to-one correspondence with the relative humidity in the environment.
In another aspect of the present invention, the present invention provides an optical humidity detection device, which includes the optical humidity detection assembly as described above. Therefore, the optical humidity detecting device has all the features and advantages of the optical humidity detecting assembly described above, and will not be described herein again. Generally speaking, the optical humidity detection device can utilize the light emitting part of the light emitting part as a light source, the light transmittance of the moisture absorption part changes after absorbing moisture, the light intensity irradiated to the photoelectric detection part is influenced, the resistance value of the photoresistance layer changes, and the current passing through the photoelectric detection part can be tested to obtain the humidity value in the environment and be displayed through the display part of the light emitting part.
Drawings
FIG. 1 shows a schematic structural diagram of an optical humidity sensing assembly according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of an optical humidity sensing assembly according to another embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a structure of a light emitting part in an optical humidity sensing assembly according to an embodiment of the present invention;
FIG. 4 shows the light transmittance of a titanium dioxide film versus relative humidity in the environment;
FIG. 5 shows a graph of relative change in current versus relative humidity in the environment;
FIG. 6 illustrates a top view of an optical wetness detecting assembly in accordance with one embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
In one aspect of the present invention, the present invention provides an optical humidity sensing assembly, and referring to fig. 1, the optical humidity sensing assembly may include: a substrate 100, a light emitting part 200, a moisture absorbing part 300, and a photodetecting part 400. Wherein, as shown in fig. 1, the light emitting part 200 is disposed on one surface of the substrate 100, and the light emitting part 200 includes a light emitting part 201 and a display part 202; the moisture absorption member 300 is disposed on a surface of the light emitting portion 201 of the light emitting member 200 away from the substrate 100, and the moisture absorption member 300 includes a moisture sensitive material layer 320; the photodetecting part 400 is disposed at a side of the moisture absorbing part 300 away from the light emitting part 200, and the photodetecting part 400 includes a photoresistor layer 420. Therefore, the light-emitting part of the light-emitting part in the optical humidity detection assembly can be used as a light source, and the display part of the light-emitting part can play a role of displaying (of course, as can be understood by those skilled in the art, the display part can also emit light so as to display); after moisture sensitive material layer in the moisture absorption part absorbs the steam in the environment, luminousness can change, and then make the light that the illuminating part sent shine the light intensity change on the photoelectric detection part through the moisture absorption part, and the resistance of photoelectric detection part changes along with the intensity of the light that shines above that, and then can obtain the relative humidity in the environment through the current strength in the test photoelectric detection part to show through the display unit.
According to an embodiment of the present invention, referring to fig. 1, the light emitting part 200 may include a first electrode layer 210, a light emitting layer 220, a second electrode layer 230, and an encapsulation layer 240, wherein the first electrode layer 210 is disposed on a surface of the substrate 100, the light emitting layer 220 is disposed on a side of the first electrode layer 210 away from the substrate 100, the second electrode layer 230 is disposed on a side of the light emitting layer 220 away from the first electrode layer 210, and the encapsulation layer 240 encapsulates the first electrode layer 210, the light emitting layer 221, and the second electrode layer 230. Therefore, the light emitting component 200 can emit light normally, and the encapsulation layer 240 can protect the first electrode layer 210, the second electrode layer 230 and the light emitting layer 220, prevent external water and oxygen from entering, and avoid adverse effects on the light emitting component.
According to some embodiments of the present invention, the first electrode layer 210 may serve as an anode of the light emitting part 200, and the material of the first electrode layer 210 may be silver (Ag); according to other embodiments of the present invention, the first electrode layer 210 may be a stacked structure of an Indium Tin Oxide (ITO) film layer and a silver film layer. According to some embodiments of the present invention, the second electrode layer 230 may serve as a cathode of the light emitting part 200, and the material of the second electrode layer 230 may be aluminum (Al), silver (Ag), or magnesium-silver alloy. The materials of the first electrode layer and the second electrode layer have good conductivity, and the performance of the light-emitting component is improved. According to some embodiments of the present invention, the light emitting component 200 may be a red light emitting component, and specifically, the material of the light emitting layer 220 is a red light emitting organic material, which has high red light luminance, and the red light luminance is less attenuated with time, so that the light emitting performance of the light emitting component is improved, and the detection of the relative humidity in the environment by the optical humidity detection component is facilitated.
According to the embodiment of the present invention, the encapsulation layer 240 may have a laminated structure of glass frit and glass, or a laminated structure of a polymer film and an inorganic film, wherein the inorganic film may be a silicon oxynitride film, thereby achieving effective encapsulation of the first electrode layer, the light emitting layer, and the second electrode layer in the light emitting part.
According to some embodiments of the present invention, the light emitting component 200 may be an OLED light emitting device, wherein the first electrode layer 210, the light emitting layer 220, and the second electrode layer 230 may be an anode, a light emitting layer, and a cathode of the OLED light emitting device, respectively, and thus the OLED light emitting device serves as a light emitting component, which is beneficial to improving the overall performance of the optical humidity detection assembly. OLEDs have many advantages as a new light emitting technology: the OLED can be thinned, and low power consumption of the device can be realized; the OLED is mainly manufactured on a substrate, can be manufactured on a flexible or rigid substrate, has more diversified substrate selection, can select glass, plastic or other materials as the substrate, and can realize bending or folding by selecting different flexible substrates when manufacturing a flexible display assembly capable of bending and folding; the OLED has the unique advantages of self-luminescence, microsecond-level response speed, high contrast, wide visual angle, ultra-light and thinness, low power consumption and the like, and is suitable for various forms such as flexibility, transparency and the like; the OLED is used as a surface light source of self-luminous solid illumination, and can realize large-area illumination, wherein the spectrum of the white OLED is the sunlight spectrum which is closest to eight o' clock in the morning at present, and does not contain ultraviolet radiation and infrared radiation and does not have the harm of blue light; when the OLED is lighted, the surface temperature of the light source is close to the body temperature of a human body, the skin can be safely touched, the color temperature can be adjusted, glare is avoided, energy is saved, and the OLED is a friendly light source which is closest to natural light in the visible light range of human eyes.
When the light emitting part 200 is an OLED light emitting device, referring to fig. 3, the light emitting part 200 may further include a hole injection layer 250, a hole transport layer 260, an electron transport layer 270, and an electron injection layer 280, wherein the hole injection layer 250 is disposed between the first electrode layer 210 and the light emitting layer 220, the hole transport layer 260 is disposed between the hole injection layer 250 and the light emitting layer 220, the electron transport layer 270 is disposed between the light emitting layer 220 and the second electrode layer 230, and the electron injection layer 280 is disposed between the electron transport layer 270 and the second electrode layer 230.
According to an embodiment of the present invention, referring to fig. 1 and 2, the moisture absorbing part 300 may include a first light transmitting layer 310, a moisture sensitive material layer 320, and a second light transmitting layer 330. In which, referring to fig. 1, the first light-transmitting layer 310 is provided on the surface of the light-emitting portion 201 away from the substrate 100, the moisture-sensitive material layer 320 is provided on the side of the first light-transmitting layer 310 away from the light-emitting portion 201, and the second light-transmitting layer 330 is provided on the side of the moisture-sensitive material layer 320 away from the light-emitting portion 201. The light transmittance of the moisture sensitive material layer 320 in the absorbent member 300 varies according to the relative humidity in the environment, i.e., the light transmittance of the moisture sensitive material layer varies after the moisture sensitive material layer absorbs moisture in the environment.
The working principle of the moisture sensitive material layer is explained below: the humidity sensitive material is a material which changes its own physical quantity after absorbing moisture in the air, and is a core part of the optical humidity sensor, and directly determines the performance of the optical humidity sensor. When the relative humidity in the environment rises, water molecules are adsorbed on the film formed by the humidity-sensitive material, and the adsorbed water molecules generate physical actions such as scattering and absorption on light beams passing through the humidity-sensitive material, so that the light intensity of the light beams penetrating through the humidity-sensitive material film layer is changed, and the light intensity irradiated on the photoelectric detection part is changed.
According to some embodiments of the present invention, the humidity sensitive material layer 320 may be a titanium dioxide film. The titanium dioxide film has excellent light transmittance, high refractive index and good chemical stability, is a very important optical film, and has been widely applied to anti-reflection coatings, interference filters, electrochromic windows, and the like, meanwhile, titanium dioxide is also an important humidity-sensitive material, fig. 4 shows a curve of the light transmittance of the titanium dioxide film changing with the relative humidity in the environment, and as can be seen from fig. 4, after the titanium dioxide film absorbs the moisture in the environment, the light transmittance thereof is correspondingly reduced with the increase of the moisture absorption degree of the film. According to some embodiments of the present invention, the thickness of the humidity-sensitive material layer 320 may be 150 nm to 250 nm, and thus, the humidity-sensitive material layer has a suitable thickness, which is beneficial to improve the performance of the humidity-sensitive material layer.
According to some embodiments of the present invention, the humidity-sensitive material layer 320 is a titanium dioxide film, and the thickness of the titanium dioxide film is 150 nm, 250 nm, for example, 150 nm, 160 nm, 180 nm, 190 nm, 200 nm, 210 nm, 230 nm, 250 nm, etc., so that the humidity-sensitive material layer has a higher light transmittance, which is beneficial to further improving the performance of the humidity-sensitive material layer; and, the thickness of the titanium dioxide film is set within the above range, the preparation is easy, and the cost is not increased remarkably. The inventors found that if the titanium oxide film is too thick, although it is easy to produce, it is easy to cause a decrease in light transmittance; and if the titanium dioxide film is too thin, although the light transmittance is higher, the preparation difficulty is obviously increased, and the reduction of the manufacturing cost is not facilitated. In the present invention, the preparation method of the titanium dioxide film is not particularly limited, and those skilled in the art can select the method according to actual needs, for example, physical preparation methods such as spin coating method, magnetron sputtering method, etc. can be adopted, and chemical preparation methods such as sol-gel method, chemical vapor deposition method, hydrothermal method, pulling method, etc. can also be adopted.
In the invention, the first light-transmitting layer 310 is used as a substrate of the humidity-sensitive material layer 320 and is used for bearing the humidity-sensitive material layer 320, and the first light-transmitting layer has high light transmittance and can allow light emitted by the light-emitting part of the lower light-emitting component 200 to transmit; the second light-transmitting layer 330 separates the moisture-sensitive material layer 320 from the photodetecting part 400, which also has a higher light transmittance. According to the embodiment of the present invention, the first light-transmitting layer 310 and the second light-transmitting layer 330 may be formed of an inorganic thin film or a polymer thin film having a high transmittance, thereby contributing to the improvement of the overall performance of the optical humidity detection assembly.
According to an embodiment of the present invention, referring to fig. 1 or fig. 2, the photodetection part 400 includes a transparent electrode layer 410, a photoresistor layer 420, and an opaque electrode layer 430, wherein the transparent electrode layer 410 is disposed on a surface of the moisture absorbing part 300 away from the substrate 100, the photoresistor layer 420 is disposed on a side of the transparent electrode layer 410 away from the moisture absorbing part 300, and the photoresistor layer 420 has a photoelectric signal conversion function, and the opaque electrode layer 430 is disposed on a side of the photoresistor layer 420 away from the moisture absorbing part 300. Therefore, after the light penetrates through the moisture absorption part, the light irradiates the photoelectric detection part, the resistance of the photoresistor layer changes along with the change of the light intensity irradiated on the photoresistor layer, the current passing through the photoresistor layer is tested, and then the relative humidity in the environment can be obtained.
According to the embodiment of the present invention, the transparent electrode layer 410 is made of a transparent conductive material, such as ITO (indium tin oxide), IZO (indium zinc oxide), and the like, so that the transparent electrode layer has good light transmittance and electrical conductivity, which is beneficial to improving the performance of the optical humidity detection assembly. According to the embodiment of the present invention, the photoresistor layer 420 has a function of photoelectric signal conversion, and may be made of semiconductor material such as cadmium sulfide or cadmium selenide, so that the photoresistor layer has a good function of photoelectric signal conversion. In the present invention, the opaque electrode layer 430 not only participates in the formation of photoelectric signal conversion, but also plays a role in isolating external light. According to some embodiments of the present invention, the opaque electrode layer 430 may be a stacked structure of an indium tin oxide layer and a silver layer, wherein the indium tin oxide layer is disposed near the photoresistor layer 420, so that the opaque electrode layer may participate in forming photoelectric signal conversion, and may also isolate external light to prevent the external light from interfering with humidity detection. According to other embodiments of the present invention, the thickness of the silver layer in the opaque electrode layer may be greater than 100 nm, which may more effectively isolate external light. According to still other embodiments of the present invention, an opaque material layer (for example, polyimide, polyethylene, polyarylate, or the like may be selected) may be further disposed on a surface of the opaque electrode layer 430 away from the substrate, so as to further enhance the effect of isolating the external light.
According to an embodiment of the present invention, referring to fig. 1, the optical humidity detecting assembly may further include a current sensing meter 500 and a power supply 600, the current sensing meter 500 being electrically connected to the transparent electrode layer 410 and the opaque electrode layer 430, respectively, and being configured to detect a current passing through the photoresistor layer 420, the power supply 600 supplying power to the optical humidity detecting assembly. It should be noted that sensitive current meter 500 is electrically connected to transparent electrode layer 410 through power supply 600 and a wire.
The principle of the optical humidity detection assembly detecting relative humidity in an environment is further explained as follows:
the overall layout of the optical humidity detection assembly is shown in fig. 2 (only the whole of the light emitting component 200 is shown in fig. 2, but the specific structure in the light emitting component is not shown), a top-emitting red OLED device may be used as the light emitting component 200, a moisture absorbing component 300 is disposed on a part of the light emitting component 200, and a part without the moisture absorbing component is used for displaying the humidity in the environment; the moisture absorption part 300 is located on a part of the surface of the light emitting part, and the light transmittance of the moisture absorption part changes after absorbing moisture (absorbing moisture), and the photo-detection part 400 is disposed on a side of the moisture absorption part 300 away from the light emitting part 200 to detect the current passing through the photo-resistance layer. When the optical humidity detection assembly works, the top-emitting red OLED device emits light, and the light is emitted upward, and after the moisture-sensitive material layer 320 in the moisture absorption part 300 absorbs moisture, the light transmittance of the moisture-sensitive material layer changes. The moisture-sensitive material layer 320 absorbs more moisture, and the transmittance thereof is lower (as shown in fig. 4), therefore, as the moisture-sensitive material layer 320 absorbs more moisture, the intensity of the red light emitted by the red OLED device decreases after passing through the moisture absorption part 300, and since the intensity of the red light passing through the moisture absorption part 300 decreases, when it irradiates the photodetection part 400, the resistance of the photoresistive layer 420 increases, and under a certain power voltage, the reading of the sensitive ammeter 500 in the photoelectric signal conversion circuit decreases as the resistance of the photoresistive layer 420 increases. Therefore, the readout of the sensitive ammeter 500 is closely related to the humidity of the moisture absorbing member 300 (relative humidity in the environment).
Assuming that the intensity of the light emitted from the light emitting component 200 is not changed, the light transmittance of the moisture absorbing component 300 and the relative humidity in the environment are in a one-to-one correspondence relationship (as shown in fig. 4), it can be known that the light intensity is not changed, when the relative humidity in the environment is t, the light transmittance of the moisture absorbing component 300 is a specific value, then the index of the sensitive ammeter 500 is constant to be i (t), and thus the relative humidity in the environment and the index of the sensitive ammeter 500 are in a one-to-one correspondence relationship. The inventor finds that the light intensity of the light emitting component 200 gradually decreases with the increase of the working time, and correspondingly, the indication i (t) of the sensitive current meter also decreases, so that the relative humidity in the environment is calculated by using the relative change amount of the current in the invention to reduce the error. In particular, definition I0Is the indication of the sensitive ammeter 500 at standard relative humidity, ItIs the indication number, delta I/I, of the sensitive ammeter 500 when the relative humidity in the environment is t% RH0Is the relative change of current, where Δ I ═ I0-ItFIG. 5 shows the relative change in current (ordinate, i.e., Δ I/I)0) The curve of the change with the relative humidity (abscissa) in the environment, as can be seen from FIG. 5, Δ I/I0The value of (a) is in one-to-one correspondence with the relative humidity in the environment. Since the readings of the sensitive ammeter and the relative humidity in the environment are in one-to-one correspondence, when the readings i (t) of the sensitive ammeter are measured, the relative humidity in the environment can be obtained and displayed through the display portion 202 of the light emitting member. According to an embodiment of the present invention, as shown in fig. 2 and fig. 6 (fig. 6 can be regarded as a top view of fig. 2), the measured relative humidity value is 42.3%, and the relative humidity in the environment is displayed through the display portion 202. It should be noted that, in the present invention, the standard relative humidity is not specifically limited, and those skilled in the art can set the standard relative humidity according to actual needs. The inventors found that when the relative humidity in the environment is small, the light transmittance of the moisture absorbing member 300 is high, the reading of the sensitive ammeter 500 is large, and the reading of the sensitive ammeter 500 when the relative humidity is small can be used as a reference to reduce the error. According to some embodiments of the invention, the relative humidity in the environment may be selected to be low (or may be low)Taken as 10% RH, 11% RH, 12% RH, 13% RH, 14% RH, 15% RH, 16% RH, 17% RH, 18% RH, 19% RH, 20% RH, etc.), the reading of sensitive ammeter 500 as I at relative standard relative humidity0With this as a reference, the relative change amount (. DELTA.I/I) of the current at a relative humidity of t% RH was calculated0) And then the relative humidity in the environment is obtained and displayed through the display part of the light-emitting part.
In another aspect of the present invention, the present invention provides an optical humidity detection device, which includes the optical humidity detection assembly as described above. Therefore, the optical humidity detecting device has all the features and advantages of the optical humidity detecting assembly described above, and will not be described herein again. In general, the light emitting component of the optical humidity detecting device can be used as a light emitting source and can also be used for displaying.
It will be appreciated by those skilled in the art that the optical humidity sensing device may also be used in some devices as an accessory for sensing ambient humidity.
The terms "first" and "second" are used herein 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 invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, reference to the term "one embodiment," "another embodiment," "some embodiments," "some specific embodiments," or "other specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An optical humidity sensing assembly, comprising:
a substrate;
a light emitting part disposed on one surface of the substrate, the light emitting part including a light emitting part and a display part;
a moisture absorbing member provided on a surface of the light emitting portion of the light emitting member away from the substrate, the moisture absorbing member including a moisture sensitive material layer;
the photoelectric detection part is arranged on one side, far away from the light-emitting part, of the moisture absorption part and comprises a photoresistance layer.
2. The optical humidity sensing assembly of claim 1,
the light emitting part includes:
a first electrode layer disposed on a surface of the substrate;
the light-emitting layer is arranged on one side, far away from the substrate, of the first electrode layer;
the second electrode layer is arranged on one side, far away from the first electrode layer, of the light-emitting layer;
an encapsulation layer encapsulating the first electrode layer, the light emitting layer, and the second electrode layer;
the absorbent member includes:
a first light-transmitting layer provided on a surface of the light-emitting portion away from the substrate;
the humidity-sensitive material layer is arranged on one side of the first light-transmitting layer away from the light-emitting part;
a second light-transmitting layer provided on a side of the humidity-sensitive material layer away from the light-emitting portion;
the photodetecting unit includes:
a transparent electrode layer provided on a surface of the moisture absorbing member away from the substrate;
the photoresistor layer is arranged on one side of the transparent electrode layer, which is far away from the moisture absorption part, and has a photoelectric signal conversion function;
and the opaque electrode layer is arranged on one side of the photoresistor layer, which is far away from the moisture absorption part.
3. The optical humidity sensing assembly of claim 2, wherein said light emitting component is a red light emitting component.
4. The optical wetness detecting assembly of claim 2, wherein the first light transmitting layer and the second light transmitting layer are each independently an inorganic thin film or a polymer thin film.
5. The optical humidity sensing assembly as claimed in claim 2, wherein the humidity sensitive material layer is a titanium dioxide thin film, and the thickness of the humidity sensitive material layer is 150-250 nm.
6. The optical humidity sensing assembly of claim 2, wherein the photoresistor layer is made of cadmium sulfide or cadmium selenide.
7. The optical humidity sensing assembly of claim 2, wherein the opaque electrode layer is a stacked structure of an indium tin oxide layer and a silver layer, wherein the indium tin oxide layer is disposed adjacent to the photoresistor layer.
8. The optical humidity sensor assembly of claim 3, further comprising a sensitive current meter and a power supply, wherein the sensitive current meter is electrically connected to the transparent electrode layer and the opaque electrode layer, respectively, and is configured to detect current passing through the photoresistor layer, and the power supply is configured to supply power to the optical humidity sensor assembly.
9. The optical humidity sensing assembly of claim 8,
definition I0Is the indication of the sensitive ammeter at standard relative humidity, ItIs the indication number of a sensitive ammeter when the relative humidity in the environment is t percent RH,. DELTA.I/I0Is the relative change of current, where Δ I ═ I0-It，△I/I0The value of (a) is in one-to-one correspondence with the relative humidity in the environment.
10. An optical humidity detection device comprising the optical humidity detection module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111149681.4A CN113884440A (en) | 2021-09-29 | 2021-09-29 | Optical humidity detection assembly and optical humidity detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111149681.4A CN113884440A (en) | 2021-09-29 | 2021-09-29 | Optical humidity detection assembly and optical humidity detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113884440A true CN113884440A (en) | 2022-01-04 |
Family
ID=79008044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111149681.4A Pending CN113884440A (en) | 2021-09-29 | 2021-09-29 | Optical humidity detection assembly and optical humidity detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113884440A (en) |
-
2021
- 2021-09-29 CN CN202111149681.4A patent/CN113884440A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1541040B (en) | OLED display with integrated photoelectric probe | |
| CN104904014B (en) | Organic optoelectronic device and the method for running organic optoelectronic device | |
| CN104995062B (en) | Dimming mirror device | |
| US8552446B2 (en) | Hidden organic optoelectronic devices with a light scattering layer | |
| TWI384666B (en) | Light detection device structure | |
| JP5703234B2 (en) | Display device | |
| JP2009231577A (en) | Organic thin film light-receiving/emitting element, and pulse sensor using the light-receiving/emitting element | |
| CN111682110B (en) | Near infrared spectrum response polymer light detection device containing non-fullerene receptor | |
| CN102576168A (en) | Conducting film or electrode with improved optical and electrical performance for display and lighting devices and solar cells | |
| CN104969354B (en) | Method for running organic optoelectronic device | |
| CN110349981A (en) | A kind of display screen integrates the light arrangement for detecting of infrared image element | |
| US9721992B2 (en) | Organic optoelectronic component with a light emitting element and a light detecting element and method for operating such an organic optoelectronic component | |
| JP2018525649A (en) | Analysis equipment | |
| US8901678B2 (en) | Light-assisted biochemical sensor | |
| WO2019135114A1 (en) | Self-powered organometallic halide perovskite photodetector with high detectivity | |
| CN113884440A (en) | Optical humidity detection assembly and optical humidity detection device | |
| US9721991B2 (en) | Organic optoelectronic component and method for operating the organic optoelectronic component | |
| KR102405616B1 (en) | Flexible transcutaneous oxygen sensor | |
| TWI400815B (en) | Light assisted biochemical sensor | |
| US11883130B2 (en) | Detecting device and measuring apparatus | |
| KR102625129B1 (en) | Wearable photoluminescence sensor and remote sensing apparatus including the same | |
| CN113471391B (en) | Quantum dot light-emitting effect transistor for coronavirus detection and preparation method thereof | |
| RU2354011C2 (en) | Receiver of optical radiation and device on its basis | |
| CN114674401A (en) | Weight test equipment | |
| AU2014274551A1 (en) | Luminaire and method for monitoring luminaire |
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 |