CN113721378A - Light-transmitting panel, intelligent window and control method of light-transmitting panel - Google Patents
Light-transmitting panel, intelligent window and control method of light-transmitting panel Download PDFInfo
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- CN113721378A CN113721378A CN202111007023.1A CN202111007023A CN113721378A CN 113721378 A CN113721378 A CN 113721378A CN 202111007023 A CN202111007023 A CN 202111007023A CN 113721378 A CN113721378 A CN 113721378A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
- G02F1/13318—Circuits comprising a photodetector
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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Abstract
The application relates to the technical field of light-transmitting panels, and discloses a light-transmitting panel, an intelligent window and a control method of the light-transmitting panel. The light-transmitting panel mainly comprises a first substrate, a second substrate, a dimming layer and a photosensitive device. The first substrate and the second substrate which are oppositely arranged are made of light-transmitting materials; the dimming layer is positioned between the first substrate and the second substrate, and the light emitting surface of the dimming layer faces the second substrate; the photosensitive device is positioned outside the light emitting surface of the light adjusting layer and generates an adjusting signal according to the illumination intensity; wherein the light modulation layer modulates light transmittance according to the modulation signal. Because the integrated photosensitive device in printing opacity panel, so can directly detect the regulation signal of the light through printing opacity panel, just can regulate and control the luminousness of printing opacity panel according to the regulation signal.
Description
Technical Field
The application relates to the technical field of light-transmitting panels, in particular to a light-transmitting panel, an intelligent window and a control method of the light-transmitting panel.
Background
A common light-transmitting panel is glass, and the prior art light-adjusting glass is a product capable of changing light transmittance. In the prior art, the adjustment of the transmittance of the light-transmitting panel is generally realized by changing the deflection direction of the dyed liquid crystal through an external electric field.
In actual use, the requirement of controlling indoor brightness uniformity and constancy usually exists, and because of different positions of glass on houses or vehicles, the external light irradiation intensity of glass incidence everywhere has difference, the control thought according to the prior art generally changes the luminousness of all glass simultaneously according to user selection, and this will lead to the illumination intensity difference of glass incidence everywhere see through being great, and the dimming glass of the prior art can not be flexibly controlled, so the effect of indoor brightness uniformity still can not be realized in practice.
Disclosure of Invention
The application mainly aims to solve the problem that the light transmittance control of the existing light transmittance panel cannot be flexibly controlled, and provides the light transmittance panel capable of automatically controlling the light transmittance, an intelligent window and a control method of the light transmittance panel.
In order to achieve the purpose of the invention, the following technical scheme is adopted in the application:
according to an aspect of the present application, there is provided a light-transmitting panel including:
the first substrate and the second substrate are arranged oppositely and are made of light-transmitting materials;
the light modulation layer is positioned between the first substrate and the second substrate, and a light emitting surface of the light modulation layer faces the second substrate; and the number of the first and second groups,
the photosensitive device is positioned outside the light emitting surface of the light adjusting layer and generates an adjusting signal according to the change of illumination intensity; wherein the light modulation layer modulates light transmittance according to the modulation signal.
According to the embodiment of the present application, the first substrate includes a first electrode layer, the second substrate includes a second electrode layer, and an electric field for controlling light transmittance of the light modulation layer is formed between the first electrode layer and the second electrode layer.
According to the embodiment of the application, the dimming layer is a liquid crystal layer, and a sealing layer wrapping the periphery of the liquid crystal layer is arranged between the first substrate and the second substrate.
According to the embodiment of the application, the photosensitive device is an amorphous silicon thin film transistor.
According to the embodiment of the application, the photosensitive device comprises a first thin film transistor and a second thin film transistor, wherein the first thin film transistor is positioned in a light transmitting area, and the second thin film transistor is positioned in a non-light receiving area; and the difference signal of the first signal electrode of the first thin film transistor and the second signal electrode of the second thin film transistor is an adjusting signal.
According to an embodiment of the present application, the first thin film transistors are plural, the second thin film transistors are plural, the first thin film transistors are connected in parallel, and the second thin film transistors are connected in parallel; the light-transmitting region includes a plurality of partitions each having one or more of the first thin film transistors therein, and the non-light-receiving region includes a plurality of partitions each having one or more of the second thin film transistors therein.
According to the embodiment of the present application, the number of the first thin film transistors and the number of the second thin film transistors are the same.
According to an embodiment of the present application, the first thin film transistor and the second thin film transistor share a gate signal and a source signal, and a current difference between a first drain of the first thin film transistor and a second drain of the second thin film transistor is used as a control signal.
According to the embodiment of the application, the second substrate comprises a thin film transistor layer and a second electrode layer, and the second electrode layer is located on one side closer to the dimming layer.
According to the embodiment of the application, the method comprises the following steps:
the power supply module is electrically connected to the photosensitive device to supply power to the photosensitive device;
the signal module is in signal connection with the photosensitive device and outputs a driving signal according to the signal of the photosensitive device; and the number of the first and second groups,
and the driving module is in signal connection with the signal module and is electrically connected with the dimming electrode layer of the light-transmitting panel so as to change the electric field between the dimming electrode layers according to the driving signal.
According to an embodiment of the present application, wherein the signal module comprises:
the signal processing module is in signal connection with the photosensitive device and outputs an adjusting signal according to the electric signal of the photosensitive device; and the number of the first and second groups,
and the driving signal generating module is in signal connection with the signal processing module and outputs a driving signal according to the adjusting signal.
According to the embodiment of the application, the power supply module supplies power to the photosensitive device at preset intervals.
According to the embodiment of the application, the driving module outputs a constant electric signal to one of the dimming electrode layers, and the driving module outputs a square wave signal with a preset frequency to the other of the dimming electrode layers.
According to another aspect of the present application, there is provided a method for controlling a light-transmitting panel, comprising the steps of:
detecting the intensity of light passing through the light-transmitting panel and outputting an adjusting signal representing the illumination intensity;
calculating a difference signal between the adjusting signal and a preset adjusting threshold value, and outputting a driving signal according to the difference signal; and the number of the first and second groups,
adjusting the light transmittance of a light adjusting layer in the light transmitting panel according to the driving signal;
and repeatedly detecting the adjusting signal representing the illumination intensity until the difference signal between the adjusting signal and the preset adjusting threshold value is smaller than the preset value.
According to an embodiment of the application, wherein:
calculating a difference signal between the adjusting signal and a preset adjusting threshold value, and outputting a driving signal according to the difference signal; the method comprises the following steps:
calculating a difference signal of the adjusting signal and a preset adjusting threshold, wherein the difference signal comprises a difference vector and a difference value;
determining a light transmittance increasing signal or a light transmittance decreasing signal according to the difference vector; and the number of the first and second groups,
and determining the light transmittance adjusting amplitude according to the difference.
In another aspect, an embodiment of the present application provides an intelligent window, which includes a plurality of light-transmitting panels as described above, or an apparatus storing the control method of the light-transmitting panels as described above.
According to the light-transmitting panel, the intelligent window and the control method of the light-transmitting panel, the light-emitting side of the light adjusting layer of the light-transmitting panel is provided with the photosensitive device, and the photosensitive device generates the adjusting signal according to the illumination intensity; wherein the light modulation layer modulates light transmittance according to the modulation signal. Because all integrated photosensitive device on every printing opacity panel, so can directly detect the illumination intensity of the light through each printing opacity panel to each printing opacity panel can directly adjust the luminousness according to this regulation signal directly, predetermines threshold signal with a unified indoor illumination intensity of predetermineeing, and each panel can be according to the luminousness of each printing opacity panel of different independent regulation and control of external illumination intensity, can realize the effect of indoor luminance homogeneity substantially.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a cross-sectional view of a first state of a light transmissive panel according to an exemplary embodiment.
Fig. 2 is a cross-sectional view of a light transmissive panel in a second state according to an exemplary embodiment.
Fig. 3 is a schematic top view of a light transmissive panel according to an exemplary embodiment.
Fig. 4 is a schematic diagram illustrating a configuration of a control module of a light-transmitting panel according to an exemplary embodiment.
Fig. 5 is a signal timing diagram illustrating a control module of a light-transmissive panel according to an exemplary embodiment.
Fig. 6 is a flow chart illustrating a method of controlling a light transmissive panel according to an exemplary embodiment.
Description of the drawings:
a first substrate 1; a first electrode layer 11;
a light-transmitting region 10;
a second substrate 2; a second electrode layer 21;
a light adjusting layer 3; a liquid crystal layer 31;
a sealing layer 32;
a first thin film transistor 41; a second thin film transistor 42;
a gate electrode 42A; a source electrode 42B;
a first drain electrode 44; a second drain electrode 45;
a lead-out row 47; a first external connection line 48;
a second external connection 49;
a power supply module 51 and a signal processing module 52;
a drive signal generation module 53; a drive module 54.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to solve the problem that the light transmittance of the existing light-transmitting panel cannot be flexibly controlled, the embodiment of the application provides the light-transmitting panel capable of automatically controlling the light transmittance, an intelligent window and a control method of the light-transmitting panel. The inventor of the present application finds that in the existing light-adjustable light-transmitting panel, for example, the light-adjustable glass used in a house is taken as an example, in order to facilitate control, a plurality of light-transmitting panels at a plurality of positions are generally connected to a controller in a centralized manner for centralized control, a common control idea is to determine uniform light transmittance or partitioned light transmittance by a user as required, then target light transmittance is input to the controller through, for example, a touch control or other instruction input device, then the controller outputs a target light transmittance signal to each light-transmitting panel, and each light-transmitting panel adjusts the respective light transmittance according to the target light transmittance signal. In the foregoing control strategy, a transmittance decision is made by a user, and a control signal network needs to be arranged, which results in poor user experience and high installation cost.
In the embodiment of the application, a photosensitive device is mainly arranged on the light emitting side of the dimming layer of the light-transmitting panel, and the photosensitive device is used for detecting the intensity of light passing through the dimming layer to generate a dimming signal; wherein the light modulation layer modulates light transmittance according to the modulation signal. Because all integrated photosensitive element on every printing opacity panel, so can directly detect the illumination intensity of the light through each printing opacity panel to each printing opacity panel can be directly according to illumination intensity adjustment luminousness, adjusts and controls the luminousness of each printing opacity panel alone according to the difference of external illumination intensity, and each printing opacity panel can carry out automatic dimming according to the illumination intensity after adjusting luminance that detects promptly, is a closed-loop control strategy, can carry out full automatic regulation according to illumination intensity objectively. The light transmittance of each light-transmitting panel can be automatically adjusted by selecting a uniform preset indoor illumination intensity preset threshold signal. Or provide a plurality of indoor light intensity modes for the user and select, each printing opacity panel can carry out the automatically regulated of luminousness, can promote user's use experience betterly.
For a more complete understanding of the present application, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:
fig. 1 is a cross-sectional view illustrating a first state of a light transmissive panel according to an exemplary embodiment, and fig. 2 is a cross-sectional view illustrating a second state of the light transmissive panel according to an exemplary embodiment, wherein fig. 1 shows that the light transmissive panel is implemented with a maximum transmittance without applying a dimming electric field, and fig. 2 shows that liquid crystal molecules are deflected to reduce the dimming ratio after applying the dimming electric field. In a first aspect, an embodiment of the present application provides a light-transmitting panel, which mainly includes a first substrate 1, a second substrate 2, a light-adjusting layer 3, and a light-sensing device 4, where the first substrate 1 and the second substrate 2 that are oppositely disposed may be made of light-transmitting materials such as glass, organic glass, or PVC; the dimming layer 3 is located between the first substrate 1 and the second substrate 2, and a light-emitting surface of the dimming layer 3 faces the second substrate 2; the photosensitive device 4 is positioned outside the light emitting surface of the light adjusting layer 3, and the photosensitive device 4 generates an adjusting signal according to the illumination intensity; wherein the light modulation layer 3 modulates the light transmittance according to the modulation signal.
It is obvious to those skilled in the art that the light sensing device 4 in the present embodiment is a layer structure light sensing device integrated in a panel, but it is obvious that the present invention can also be various light intensity sensors or light sensing devices that can be used for detecting the illumination intensity, as long as the device can output a signal representing the illumination intensity according to the illumination intensity variation of the lower layer of the light adjusting layer or a device integrated in the panel, such as a photodiode, a photovoltaic device, etc., and is not limited specifically.
According to the embodiment of the present application, the first substrate 1 includes the first electrode layer 11, the second substrate 2 includes the second electrode layer 21, and an electric field for changing the light transmittance of the light modulation layer 3 is formed between the first electrode layer 11 and the second electrode layer 21. The first electrode layer 11 and the second electrode layer 21 may be Indium Tin Oxide (ITO) layers, and specifically may be formed by plating an Indium Tin Oxide (ITO) film on a soda-lime-based or silicon-boron-based substrate glass by a magnetron sputtering method. It will be apparent to those skilled in the art that a barrier layer of silicon dioxide is typically applied before or after the indium tin oxide to prevent sodium ions on the substrate glass from diffusing into the liquid crystal in the cell.
According to the embodiment of the present application, the dimming layer 3 includes a liquid crystal layer 31, and a sealing layer 32 is disposed between the first substrate 1 and the second substrate 2 and surrounds the liquid crystal layer 31. The sealing layer 32 may be a common opaque frame sealing adhesive (seal adhesive), and the sealing layer 32 is disposed between the first substrate 1 and the second substrate 2 to facilitate the encapsulation of the light modulation layer 3 and prevent the liquid crystal molecules from overflowing. The sealing layer 32 is located in a non-light-receiving region, and the sealing layer 32 is internally framed to define a light-transmitting region 10, in which light transmittance is adjusted by the liquid crystal layer 31 in the light-transmitting region 10.
In the embodiment of the present application, the material of the liquid crystal layer 31 includes liquid crystal molecules and dichroic dye molecules. Depending on the dichroic properties of the dichroic dye molecules, only light that is in parallel with the long axis of the dye molecules in the incident light can be absorbed. Specifically, in this embodiment, the liquid crystal layer 31 is a TN (Twist Nematic) mode driving liquid crystal as an example. The first electrode layer 11 and the second electrode layer 21 have voltage, an electric field between the first electrode layer 11 and the second electrode layer 21 can drive liquid crystal molecules in the dyed liquid crystal layer to deflect, when no voltage is applied to the first electrode layer 11 and the second electrode layer 21, the inclination angle of the liquid crystal molecules is parallel to the first substrate 1, the dye molecules do not absorb light, the transmittance of the light adjusting layer 3 is close to 100%, and the light adjusting glass is in a bright state; when a voltage is applied to the first electrode layer 11 and the second electrode layer 21, the tilt angle of the liquid crystal molecules is approximately perpendicular to the first substrate 1, the dye molecules absorb light, the transmittance of the light adjusting layer 3 is approximately gradually reduced, and the light adjusting glass is in a dark state.
According to the embodiment of the present application, the second substrate 2 includes a film layer where the photosensitive device 4 is located and a second electrode layer 21, the second electrode layer 21 is located on a side closer to the dimming layer 3, wherein the photosensitive device 4 can be selected as an amorphous silicon Thin Film Transistor (TFT). Amorphous silicon (a-Si) in the silicon-based thin film transistor is sensitive to illumination, a photogenerated carrier can be generated under illumination, the impedance is correspondingly reduced, the current can be obviously increased under the same bias voltage, and the amorphous silicon Thin Film Transistor (TFT) can be used as the photosensitive device 4 according to the principle. The use of such a photosensitive device 4 enables a great reduction in cost and a reduction in product size.
Fig. 3 is a schematic top view illustrating a light-transmissive panel according to an exemplary embodiment, wherein the thin film transistors may include a plurality of first thin film transistors 41 and a plurality of second thin film transistors 42, the first thin film transistors 41 are located in the light-transmissive region 10 to detect light passing through the light-transmissive layer 3, the second thin film transistors 42 are located in the non-light-receiving region (the sealing layer 32), and the second thin film transistors 42 are located in a dark state in the frame sealing adhesive to provide a reference signal for outputting a control signal according to an embodiment of the present application. The difference between the first signal electrode of the first thin film transistor 41 and the second signal electrode of the second thin film transistor 42 is a control signal, and one of the two sets of thin film transistors is in a dark state to provide a reference signal, and the other is in a light-transmitting area to provide a detection signal, so that an environment signal required by dimming can be formed without signal calibration. The number of the first thin film transistors 41 and the number of the second thin film transistors 42 are the same, so that a reference signal for alignment is provided, and the detection accuracy is ensured.
As shown in fig. 3, the second thin film transistors 42 may be arranged in three groups on the layer where the photosensitive device 4 is located, and a group of 4 second thin film transistors 42 are formed in the frame sealing adhesive on both sides, and a group of 7 second thin film transistors 42 are formed on the long side. And the first thin film transistor 41 is provided in the same form as the second thin film transistor 42 and is positioned substantially in alignment. In this way, the light-transmitting area 10 can be divided into a plurality of sections, each section has one or more first thin film transistors 41, the light-receiving-free area can be divided into a plurality of sections, each section has one or more second thin film transistors 42, so as to form a light intensity detection scheme covering a larger area range. In this embodiment, an outgoing line bank 47 is disposed on one side of the upper portion of the layer where the photo sensing device 4 is located so as to be connected to the gate electrode 42A, the source electrode 42B, the first drain electrode 44 and the second drain electrode 45 and the control module, and meanwhile, the outgoing line bank 47 is further provided with a first external connection line 48 connected to the first substrate 1 and a second external connection line 49 connected to the second substrate 2. Therefore, the connection between the light-transmitting panel and the control module can be completed by soldering the FPC to the wire connecting row 47, in an exemplary embodiment, the control module may include a control IC (which may be considered as a signal module), a driving IC (which may be considered as a driving module), a power supply (which may be considered as a power supply module), and a signal transmission module (which may be obviously understood as a common wireless or wired signal transmission device), the control module may be fixed in the frame sealing adhesive after being packaged, and of course, the power supply and the signal module may also be configured in a centralized manner, which is not particularly limited.
According to the embodiment of the present application, the first thin film transistors 41 are connected in parallel, the second thin film transistors 42 are also connected in parallel, wherein the first thin film transistors 41 and the second thin film transistors 42 share signals of the gate 42A and the source 42B, and the current difference between the first drain 44 of the first thin film transistor 41 and the second drain 45 of the second thin film transistor 42 is used as a control signal, so that the first thin film transistor 41 and the second thin film transistor 42 have the same voltage and signal mode, thereby avoiding the detection error caused by the difference of the basic signal mode. The output current signals of the plurality of parallel thin film transistors are equal to the sum of the currents of all the first thin film transistors 41, and the first thin film transistors 41 and the second thin film transistors 42 are aligned one by one and located adjacent to each other, so that the parallel thin film transistors have substantially the same physical environment, for example, even if the current of part of the transistors is abnormally changed due to the temperature change of part of the regions, the transistors involved in comparison are also synchronously abnormally changed, and therefore, the adjustment of the light transmittance is not affected by the abnormal change of the environment.
The working principle of the above embodiment is illustrated as follows: when the ambient light is selected as the reference, the current difference between the first Drain 44(Drain1) and the second Drain 45(Drain2) is Δ I, which may be stored as the reference value θ I, and of course, the reference value θ I may also be stored in the control module in advance. When the external light changes to be strong, the current of the first thin film transistor 41 in the light transmission region is significantly increased, and the current difference between the first Drain 44(Drain1) and the second Drain 45(Drain2) is greater than the preset reference value θ I, the voltage difference between the first substrate 1 and the second substrate 2 is controlled to be increased, that is, the liquid crystal transmittance is reduced, the illumination intensity of the first thin film transistor 41 is reduced until the current difference is reduced to the preset reference value θ I, and the voltage is maintained to be constant. When the external light is weakened and the current difference is lower than the preset reference value thetai, the pressure difference between the glass substrates is controlled to be reduced, namely the liquid crystal transmittance is increased, the light intensity is increased when the first thin film transistor 41 is irradiated until the current difference is increased to the preset reference value thetai. Certainly, there is a case that the current difference is still smaller than the preset reference value θ I when the voltage difference is reduced to 0V, and at this time, it can be determined as a low light mode such as night or the like, and the non-powered state can be maintained, so as to keep the transmittance of the glass at a maximum.
Fig. 4 is a schematic diagram illustrating a configuration of a control module of a light-transmitting panel according to an exemplary embodiment. Fig. 5 is a signal timing diagram illustrating a control module of a light-transmissive panel according to an exemplary embodiment. According to the embodiment of the application, the control module part mainly comprises: the device comprises a power supply module 51, a signal module and a driving module 54, wherein the power supply module 51 is electrically connected to the photosensitive device 4 to supply power to the photosensitive device 4; the signal module is in signal connection with the photosensitive device 4, the photosensitive device 4 outputs an adjusting signal according to the illumination intensity, and the signal module outputs a driving signal according to the adjusting signal; the driving module 54 is in signal connection with the signal module and is electrically connected to the light modulation electrode layers (the first electrode layer 11 and the second electrode layer 21) of the light transmissive panel to change the electric field between the light modulation electrode layers according to the driving signal. The power supply module 51 may be a dc power supply, and may provide a low-voltage control power supply for each module in the system, and also provide a high-voltage driving power supply for the driving module.
The signal module may be a control IC, and mainly includes a signal processing module 52 and a driving signal generating module 53, where the signal processing module 52 is in signal connection with the light sensing device 4 and outputs an adjustment signal according to an electrical signal of the light sensing device 4; the driving signal generating module 53 is connected to the signal processing module 52 by signals, and outputs a driving signal according to the adjustment signal.
According to the embodiment of the present application, the power supply module 51 supplies power to the photosensitive device 4 at preset intervals. Wherein the power supply module 51 can provide a square wave timing signal for the light sensing device 4; the light sensing device 4 outputs two sets of electric signals in common, including an electric signal first Drain 44(Drain1) corresponding to the intensity of the light transmitted through the liquid crystal layer and a reference signal second Drain 45(Drain2) in a dark state; the signal processing module amplifies the electrical signals of the first Drain 44(Drain1) and the second Drain 45(Drain2), and obtains a difference Vout between the electrical signals of the first Drain 44(Drain1) and the second Drain 45(Drain2) after amplification; the driving signal generating module is configured to determine a driving signal Vdrive of the liquid crystal driving module according to the difference value Vout and transmit the Vdrive to the liquid crystal driving module, and the liquid crystal driving module drives the light adjusting glass liquid crystal to deflect, i.e. adjust the light transmittance of the light adjusting layer 3 with the driving signal Vdrive.
According to the embodiment of the present application, one side of the first electrode layer 11 and the second electrode layer 21 is a constant Vcom signal, and the other side is a square wave signal, which can prevent the abnormal transmittance adjustment caused by the polarization of the liquid crystal. In order to prevent the characteristic drift of the thin film transistor caused by the long-term operation of the thin film transistor in illumination, most time of the grid electrode and the source electrode is 0V, the grid electrode and the source electrode are opened at fixed intervals for one time, and the time interval can be determined according to actual use scenes.
Fig. 6 is a flow chart illustrating a method of controlling a light transmissive panel according to an exemplary embodiment. According to another aspect of the present application, there is provided a method for controlling a light-transmitting panel, comprising the steps of:
s1, detecting the intensity of the light passing through the light-transmitting panel and outputting an adjusting signal representing the illumination intensity; according to the above description, where the adjustment signal is the current difference signal between the first Drain 44(Drain1) and the second Drain 45(Drain2), where the current difference between the first Drain 44(Drain1) and the second Drain 45(Drain2) is Δ I, when the external light is strong, the current of the first thin film transistor 41 in the light transmissive region increases significantly, and the current difference between the first Drain 44(Drain1) and the second Drain 45(Drain2) is larger than the predetermined reference value θ I. When the external light is weakened, the current difference delta I is lower than a preset reference value theta I;
s2, calculating a difference signal between the adjusting signal and a preset light intensity threshold value, and outputting a driving signal according to the difference signal; the signal processing module is used for amplifying the first Drain 44(Drain1) and the second Drain 45(Drain2) of the electrical signals, and acquiring a difference Vout between the electrical signals of the first Drain 44(Drain1) and the second Drain 45(Drain2) after amplification; it should be understood that the control IC in the control module separately disposed from the light-transmitting panel may be selected to perform the signal processing, which is not limited to this, as long as the signal operation can be performed.
S3, adjusting the light transmittance of the light adjusting layer 3 in the light-transmitting panel according to the driving signal; the driving signal generation module is configured to determine a driving signal Vdrive of the liquid crystal driving module according to the difference value Vout and transmit the Vdrive to the liquid crystal driving module, and the liquid crystal driving module drives the light adjusting glass liquid crystal to deflect, i.e. adjust and control the light transmittance of the light adjusting layer 3 according to the driving signal Vdrive; it should be understood that the signal processing may be executed by a driver IC in a control module separately disposed from the light-transmitting panel, but the invention is not limited thereto as long as the signal processing can be executed. And the number of the first and second groups,
and S4, repeatedly detecting the intensity of the light passing through the light-transmitting panel until the difference signal between the adjusting signal and the preset light intensity threshold value is smaller than the preset value. That is, this application embodiment can detect many times automatic adjustment many times, until the printing opacity light intensity accord with the user's default of selecting can, so can ensure the adjustment effect.
According to an embodiment of the application, the calculating a difference signal between the adjustment signal and the light intensity threshold and outputting the driving signal according to the difference signal includes:
calculating a difference signal between the adjustment signal and a light intensity threshold, wherein the difference signal comprises a difference vector and a difference value;
determining a light transmittance increasing signal or a light transmittance decreasing signal according to the difference vector; and the number of the first and second groups,
and determining the light transmittance adjusting amplitude according to the difference.
According to the light-transmitting panel, the intelligent window and the control method of the light-transmitting panel, the light-emitting side of the dimming layer 3 of the light-transmitting panel is provided with the photosensitive device 4, and the photosensitive device 4 generates the adjusting signal according to the illumination intensity; wherein the light modulation layer 3 modulates the light transmittance according to the modulation signal. Because all integrated photosensitive device 4 on every printing opacity panel, so can directly detect the accommodate signal of the light through each printing opacity panel to each printing opacity panel can directly adjust the luminousness according to this accommodate signal directly, adjusts and controls the luminousness of each printing opacity panel alone according to the difference of external illumination intensity.
For the above light-transmitting panel, the embodiment of the present invention provides a method for manufacturing the light-transmitting panel, and for convenience of description, the light-transmitting panel is taken as a rectangular glass for example, and at this time, the encapsulation area is a rectangular closed-loop structure, and the encapsulation area has a first side edge and a second side edge which are oppositely arranged, and a third side edge and a fourth side edge which are oppositely arranged. The method includes the steps of forming a first substrate, a second substrate, and a dye liquid crystal layer filled between the first substrate and the second substrate. Here, the formation of the second substrate and the dye liquid crystal layer is the same as the above-described steps and will not be described again.
Wherein, forming the light-transmitting panel comprises the following steps:
step one, forming a first electrode layer 11 on a first substrate 1 through an evaporation process;
step two, forming a layer where the photosensitive device 4 is located on the second substrate 2 through a patterning process, wherein the layer comprises a plurality of film transistors and matched electrodes which are formed in a layered mode, and the step two is not repeated because the layer is the prior art;
forming a second electrode layer 21 outside the layer where the photosensitive device 4 is located through an evaporation process;
step four, spraying a material of a spacer (ball spacer) between the first electrode layer 11 and the second electrode layer 21 to form a space for supporting liquid crystal by the spacer;
coating frame sealing glue on the first electrode layer 11 or the second electrode layer 21, mixing liquid crystal molecules with dichroic dye molecules to form dye liquid crystal, and dripping the dye liquid crystal on a box forming area on the inner side of the frame sealing glue; the first substrate 1 and the second substrate 2 are then opposed to each other to form a light-transmitting panel.
On the other hand, the embodiment of the invention also provides an intelligent window, which comprises a plurality of the light-transmitting panels. Wherein the smart window can be applied to vehicles, airplanes, buildings, etc. Each light-transmitting panel in the intelligent window system can be in signal connection with one control panel, the control panel can output required light intensity threshold values to the control modules in the light-transmitting panels according to user instructions, and the specific light transmittance is automatically controlled independently by the light-transmitting panels respectively. Meanwhile, each light-transmitting panel can be managed in a grouping mode, for example, the light-transmitting panels in the same area are grouped together to facilitate signal connection.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (15)
1. A light transmitting panel, comprising:
the first substrate and the second substrate are arranged oppositely and are made of light-transmitting materials;
the light modulation layer is positioned between the first substrate and the second substrate, and a light emitting surface of the light modulation layer faces the second substrate; and the number of the first and second groups,
the photosensitive device is positioned outside the light emitting surface of the light adjusting layer and generates an adjusting signal according to the illumination intensity; wherein the light modulation layer modulates light transmittance according to the modulation signal.
2. The light-transmissive panel of claim 1, wherein the first substrate comprises a first electrode layer, the second substrate comprises a second electrode layer, and an electric field for controlling light transmittance of the light-modulating layer is formed between the first electrode layer and the second electrode layer.
3. A light-transmitting panel as claimed in claim 1, wherein the light-adjusting layer is a liquid crystal layer, and a sealing layer is provided between the first substrate and the second substrate so as to surround the liquid crystal layer.
4. A light-transmissive panel in accordance with claim 1, wherein the light-sensing device comprises a first thin film transistor and a second thin film transistor, wherein the first thin film transistor is located in the light-transmissive region and the second thin film transistor is located in the non-light-transmissive region; a difference signal of a first signal electrode of the first thin film transistor and a second signal electrode of the second thin film transistor is an adjusting signal; the first thin film transistor and the second thin film transistor are both amorphous silicon thin film transistors.
5. The light transmissive panel of claim 4, wherein the first thin film transistors are plural, the second thin film transistors are plural, the first thin film transistors are connected in parallel, and the second thin film transistors are connected in parallel; the light-transmitting region includes a plurality of partitions each having one or more of the first thin film transistors therein, and the non-light-receiving region includes a plurality of partitions each having one or more of the second thin film transistors therein.
6. The light transmissive panel of claim 5, wherein the first thin film transistors and the second thin film transistors are equal in number.
7. The light transmissive panel of claim 5, wherein the first thin film transistor and the second thin film transistor share gate and source signals, and a difference between currents of the first drain of the first thin film transistor and the second drain of the second thin film transistor is used as a regulation signal.
8. The light-transmissive panel of claim 2, wherein the second substrate comprises a thin-film transistor layer and a second electrode layer, the second electrode layer being located on a side closer to the dimming layer.
9. The light transmitting panel of any one of claims 1 to 8 comprising:
the power supply module is electrically connected to the photosensitive device to supply power to the photosensitive device;
the signal module is in signal connection with the photosensitive device and outputs a driving signal according to the signal of the photosensitive device; and the number of the first and second groups,
and the driving module is in signal connection with the signal module and is electrically connected with the dimming electrode layer of the light-transmitting panel so as to change the electric field between the dimming electrode layers according to the driving signal.
10. The light transmitting panel of claim 9 wherein the signal module comprises:
the signal processing module is in signal connection with the photosensitive device and outputs an adjusting signal according to the electric signal of the photosensitive device; and the number of the first and second groups,
and the driving signal generating module is in signal connection with the signal processing module and outputs a driving signal according to the adjusting signal.
11. The light-transmitting panel of claim 9 wherein the power module supplies power to the light-sensing device at predetermined intervals.
12. The light transmitting panel of claim 9, wherein the driving module outputs a constant electrical signal to one of the dimming electrode layers, and the driving module outputs a square wave signal of a predetermined frequency to the other of the dimming electrode layers.
13. A method of controlling a light transmissive panel, comprising the steps of:
detecting the intensity of light passing through the light-transmitting panel and outputting an adjusting signal representing the illumination intensity;
calculating a difference signal between the adjusting signal and a preset adjusting threshold value, and outputting a driving signal according to the difference signal; and the number of the first and second groups,
adjusting the light transmittance of a light adjusting layer in the light transmitting panel according to the driving signal;
and repeatedly detecting the adjusting signal representing the illumination intensity until the difference signal between the adjusting signal and the preset adjusting threshold value is smaller than the preset value.
14. The control method of claim 13, wherein the calculating of the difference signal between the adjustment signal and a preset adjustment threshold outputs a driving signal based on the difference signal; the method comprises the following steps:
calculating a difference signal of the adjusting signal and a preset adjusting threshold, wherein the difference signal comprises a difference vector and a difference value;
determining a light transmittance increasing signal or a light transmittance decreasing signal according to the difference vector; and the number of the first and second groups,
and determining the light transmittance adjusting amplitude according to the difference.
15. A smart window comprising a plurality of light-transmitting panels as claimed in any one of claims 1 to 12, or,
the smart window comprises means for storing the method of controlling the light-transmitting panel of claim 13 or 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111007023.1A CN113721378A (en) | 2021-08-30 | 2021-08-30 | Light-transmitting panel, intelligent window and control method of light-transmitting panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111007023.1A CN113721378A (en) | 2021-08-30 | 2021-08-30 | Light-transmitting panel, intelligent window and control method of light-transmitting panel |
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| CN113721378A true CN113721378A (en) | 2021-11-30 |
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| CN202111007023.1A Withdrawn CN113721378A (en) | 2021-08-30 | 2021-08-30 | Light-transmitting panel, intelligent window and control method of light-transmitting panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114527588A (en) * | 2022-02-28 | 2022-05-24 | 武汉华星光电技术有限公司 | Polymer liquid crystal dimming box, display module and electronic equipment |
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2021
- 2021-08-30 CN CN202111007023.1A patent/CN113721378A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114527588A (en) * | 2022-02-28 | 2022-05-24 | 武汉华星光电技术有限公司 | Polymer liquid crystal dimming box, display module and electronic equipment |
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