WO2023245424A1 - 调光玻璃切换方法 - Google Patents

调光玻璃切换方法 Download PDF

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Publication number
WO2023245424A1
WO2023245424A1 PCT/CN2022/100151 CN2022100151W WO2023245424A1 WO 2023245424 A1 WO2023245424 A1 WO 2023245424A1 CN 2022100151 W CN2022100151 W CN 2022100151W WO 2023245424 A1 WO2023245424 A1 WO 2023245424A1
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WIPO (PCT)
Prior art keywords
voltage
dimming glass
glass
alternating current
switching
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PCT/CN2022/100151
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English (en)
French (fr)
Inventor
林宗贤
李承璋
曾衡逸
张立旻
林冠吾
Original Assignee
绚丽光电股份有限公司
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Application filed by 绚丽光电股份有限公司 filed Critical 绚丽光电股份有限公司
Priority to PCT/CN2022/100151 priority Critical patent/WO2023245424A1/zh
Publication of WO2023245424A1 publication Critical patent/WO2023245424A1/zh

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • 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
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering

Definitions

  • the present invention relates to an optoelectronic component technology, in particular to a dimming glass switching method that can switch privacy protection mode and quickly restore the transparent state.
  • glass is used to isolate or protect the space inside the glass. It also has the function of lighting and seeing through objects on the other side of the glass. Frosting the surface of the glass or using a matte film can cause the light to scatter through the glass on the other side of the glass. Forming a blurry image on the side to achieve privacy protection and retain the lighting function.
  • another existing dimming glass can also be powered on and other active control methods, so that the glass can be between the two modes of transparent viewing and fogging and blurring. switch.
  • the above-mentioned existing dimming glass disturbs the liquid crystal molecules in the glass through changes in the electric field, causing multiple scattering of the light incident on the glass.
  • the remaining charged ions may form a temporary built-in electric field, causing the liquid crystal to Molecules cannot immediately return to the transparent state before powering on.
  • Existing dimmable glass has problems such as delayed mode switching, poor controllability, and reduced visual effects.
  • the purpose of the present invention is to provide a dimming glass switching method that can quickly switch the privacy protection state and the transparent state of the dimming glass.
  • a second object of the present invention is to provide a method for switching dimmable glass, which can improve the blurred visual effect of the dimmable glass.
  • Another object of the present invention is to provide a dimming glass switching method that can save dimming power.
  • the dimming glass switching method of the present invention includes: a transparent stage, in which no voltage is applied to a dimming glass, and the dimming glass presents a transparent state; an operation stage, in which an alternating current is applied to the dimming glass, and the amplitude of the alternating current Maintaining a first voltage, the dimming glass exhibits a scattering state; and a switching phase, after the operation phase, the amplitude of the alternating current is increased to a second voltage, the second voltage is greater than the first voltage, the modulation The light glass maintains the scattering state. After the switching stage is maintained for a duration, the supply of the alternating current is stopped and returns to the transparent stage. The dimming glass returns to the transparent state.
  • the switching method of the dimming glass of the present invention can reduce the power consumed to maintain the scattering state by applying the alternating current of the first voltage to the dimming glass, and by applying the second voltage to the dimming glass.
  • the AC power supply is stopped after the duration, which can reduce the reaction time required for the dimming glass to return from the scattering state to the transparent state, thereby reducing the dimming conversion delay, improving the dimming visual effect and saving electricity. and other effects.
  • the first voltage is the lowest voltage value at which the alternating current causes the haze value of the dimming glass to reach more than 80%.
  • the dimmable glass can maintain the privacy protection effect with the lowest energy consumption, and has the effect of saving electricity.
  • the second voltage is the voltage value of the shortest reaction time for the alternating current to stop being applied to the dimming glass and return to the transparent state.
  • the dimming glass can significantly reduce the delay in switching from the scattering state to the transparent state, and has the effect of improving dimming controllability.
  • the duration is the shortest time for which the alternating current of the second voltage needs to be applied when the response time of the dimming glass to restore the transparent state is less than 0.5 seconds. In this way, the supply time of high-voltage AC power can be reduced, which has the effect of reducing power consumption and quickly switching the dimming state.
  • the dimming glass includes two substrates and a liquid crystal material located between the two substrates.
  • the two substrates are transparent and conductive.
  • the liquid crystal material includes negative liquid crystal and salt ions. In this way, the electric field can be switched to act on the liquid crystal material, and the liquid crystal material can be disturbed by changes in the electric field to present a multiple scattering state, which has the effect of electronically controlled switching of dimming modes.
  • FIG. 1 Voltage switching timing diagram of the preferred embodiment of the present invention
  • Figure 2 Diagram of the switching situation of the dimming state according to the preferred embodiment of the present invention
  • Figure 3 The relationship between the haze value and the applied voltage value of the dimming glass according to the preferred embodiment of the present invention
  • Figure 4 The relationship between the response time of the dimming glass to restore transparency and the applied voltage value according to the preferred embodiment of the present invention
  • Figure 5 The relationship between the power supply duration and the reaction time required to restore transparency of the dimmable glass according to the preferred embodiment of the present invention.
  • FIG. 1 is a preferred embodiment of the dimming glass switching method of the present invention, including a transparent stage S1, an operating stage S2 and a switching stage S3.
  • the switching stage S3 is to convert the operating stage S2 into
  • the transparency stage S1 is to switch the privacy protection state of a dimming glass to a two-way transparent state.
  • the dimming glass can be made by injecting a liquid crystal material 1 between two transparent and conductive substrates 2.
  • the two substrates 2 are respectively electrically connected to voltage sources to form an electric field that acts on the liquid crystal.
  • Material 1 can control the arrangement direction of the liquid crystal, so that light incident on the liquid crystal material 1 can directly pass through or form scattering, and has the function of switching the dimming glass to be transparent or atomized.
  • the liquid crystal material 1 includes negative liquid crystal and salt ions, and the two substrates 2 act on the liquid crystal material 1 in a vertical alignment.
  • the liquid crystal molecules in the liquid crystal material 1 are neatly arranged perpendicularly to the two substrates 2, so that light can directly penetrate the dimming glass in a transparent state; when the AC voltage acts between the two substrates 2, the liquid crystal molecules follow the The electric field changes and disturbs, resulting in a random and chaotic arrangement, causing the light to diffuse and emit in a scattering state after changing paths multiple times in the liquid crystal material 1 .
  • an alternating current is applied to the dimming glass.
  • the amplitude of the alternating current is a first voltage V1.
  • the frequency of the alternating current can be a common operating frequency of the general power transmission network, for example: 50 Hz. Or 60 Hz, the present invention is not limited to this.
  • the amplitude of the alternating current is increased to a second voltage V2.
  • the second voltage V2 is greater than the first voltage V1.
  • the frequency of the alternating current can be maintained unchanged.
  • the switching phase S3 is The alternating current is maintained at the second voltage V2 for a duration T, so that the dimming glass still exhibits the scattering state. After the duration T, the supply of the alternating current is stopped and returns to the transparent stage S1, so that the dimming glass still exhibits the scattering state. The glass immediately returns to its transparent state.
  • FIG 3 is a graph showing the relationship between the haze value (Haze) of the dimming glass in this embodiment and the voltage value acting on the dimming glass.
  • the alternating current applied to the dimming glass is increased to 15 Volts and above can make the haze value reach 80% to 94%.
  • selecting a voltage value that can reach a minimum haze value of more than 80% can save power.
  • the haze value is achieved.
  • the voltage value of 80% is between 10V and 15V, so the first voltage V1 used in the operation stage S2 may be 15 volts.
  • Figure 4 is a graph showing the relationship between the reaction time for the dimming glass of this embodiment to return to transparency after the application of alternating current is stopped and the applied voltage value.
  • the amplitude of the alternating current is 14 volts, the adjustment is stopped. If the light glass is powered, the dimming glass will need a reaction time of 8.5 seconds to return from the scattering state to the transparent state. In comparison, using an alternating current greater than 22 volts can reduce the reaction time to less than 1 second.
  • the second voltage V2 used in the switching stage S3 is preferably 40 volts, and the required response time is 0.36 seconds.
  • FIG. 5 is a relationship diagram between the duration of AC power maintained at 40V applied to the dimming glass in this embodiment and the reaction time required to restore transparency.
  • FIG. 1 again.
  • First apply the alternating current of 15 volts to the dimming glass and maintain it for 10 seconds, then increase the alternating current to 40 volts, and stop supplying the alternating current after the duration T, as shown in Figure 5.
  • the duration T is At 90 milliseconds, the reaction time required for the dimming glass to return to transparency can be reduced to 0.5 seconds.
  • the switching method of the dimming glass of the present invention can reduce the power consumed to maintain the scattering state by applying the alternating current of the first voltage to the dimming glass, and by applying the alternating current to the dimming glass.
  • the alternating current of the second voltage stops supplying power after the duration, which can reduce the reaction time required for the dimming glass to return from the scattering state to the transparent state, thereby reducing the dimming conversion delay, improving the dimming visual effect and saving money. Power consumption and other functions.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)

Abstract

一种调光玻璃切换方法，用以解决现有调光玻璃由雾态切换至透明态过程的时间延迟问题。包括：一个透明阶段（S1），未施加电压于一个调光玻璃，调光玻璃呈现一个透明态；一个操作阶段（S2），对调光玻璃施加一个交流电，交流电的振幅维持一个第一电压（V1），调光玻璃呈现一个散射态；及一个切换阶段（S3），在这一操作阶段之后，将交流电的振幅提升至一个第二电压（V2），第二电压（V2）大于第一电压（V1），调光玻璃维持呈现散射态，切换阶段（S3）维持一个持续时间（T）后，停止供应交流电而回到透明阶段（S1），调光玻璃恢复透明态。

Description

调光玻璃切换方法 技术领域
本发明是关于一种光电组件技术，尤其是一种能够切换隐私保护模式并快速恢复透明状态的调光玻璃切换方法。
 背景技术
一般玻璃是用于隔离或保护玻璃内空间，同时具有采光及透视玻璃另一侧对象的作用，而在玻璃表面做磨砂加工或使用雾面贴膜，可以使光线穿过玻璃发生散射在玻璃另一侧形成模糊影像，达到隐私保护效果并保留采光功能，并且，另一种现有的调光玻璃还可以通过通电等主动控制方法，使玻璃能够在透明可视与雾化模糊两种模式之间切换。
 技术问题
上述现有的调光玻璃是通过电场变化扰乱玻璃内的液晶分子，造成入射该玻璃的光线发生多重散射，但是，电压源停止供电后，残留的带电离子可能形成暂时的内建电场，导致液晶分子无法立即恢复通电之前的透明状态，现有的调光玻璃具有模式转换延迟、操控性不佳及降低视觉效果等问题。
有鉴于此，现有的调光玻璃确实仍有加以改善的必要。
 技术解决方案
为解决上述问题，本发明的目的是提供一种调光玻璃切换方法，可以快速切换调光玻璃的隐私保护状态及透明状态。
本发明的次一个目的是提供一种调光玻璃切换方法，可以提升调光玻璃的模糊视觉效果。
本发明的又一个目的是提供一种调光玻璃切换方法，可以节省调光用电量。
本发明全文所记载的组件及构件使用“一”或“一个”的量词，仅是为了方便使用且提供本发明范围的通常意义；于本发明中应被解读为包括一个或至少一个，且单一的概念也包括多个的情况，除非其明显意指其他意思。
本发明的调光玻璃切换方法，包括：一个透明阶段，未施加电压于一个调光玻璃，该调光玻璃呈现一个透明态；一个操作阶段，对该调光玻璃施加一个交流电，该交流电的振幅维持一个第一电压，该调光玻璃呈现一个散射态；及一个切换阶段，在该操作阶段之后，将该交流电的振幅提升至一个第二电压，该第二电压大于该第一电压，该调光玻璃维持呈现该散射态，该切换阶段维持一个持续时间后，停止供应该交流电而回到该透明阶段，该调光玻璃恢复该透明态。
因此，本发明的调光玻璃切换方法，通过对该调光玻璃施加该第一电压的该交流电，可以降低维持该散射态所耗费的电能，并且，通过对该调光玻璃施加该第二电压的该交流电，在该持续时间后停止供电，可以减少该调光玻璃由该散射态恢复至该透明态所需的反应时间，具有降低调光转换延迟、提升调光视觉效果及节省用电量等功效。
其中，该第一电压是该交流电使该调光玻璃的雾度值达到80％以上的最低电压值。如此，该调光玻璃可以利用最低耗能维持隐私保护效果，具有节约用电的功效。
其中，该第二电压是该交流电停止施加于该调光玻璃而恢复该透明态的最短反应时间的电压值。如此，该调光玻璃可以大幅减少由散射态切换为透明态的延迟情形，具有提升调光操控性的功效。
其中，该持续时间是该调光玻璃恢复该透明态的反应时间低于0.5秒所需要施加该第二电压的该交流电的最短时间。如此，可以减少高电压交流电的供应时间，具有减少用电量及快速切换调光状态的功效。
其中，该调光玻璃包括两个基板及位于该两个基板之间的一个液晶材料，该两个基板是透明且可导电，该液晶材料包括负型液晶及盐类离子。如此，可以切换电场作用于液晶材料，并使液晶材料随电场变化扰动而呈现多重散射状态，具有电控切换调光模式的功效。
 附图说明
图1：本发明较佳实施例的电压切换时序图；
图2：本发明较佳实施例的调光状态切换情形图；
图3：本发明较佳实施例的调光玻璃雾度值与施加电压值的关系图；
图4：本发明较佳实施例的调光玻璃恢复透明的反应时间与施加电压值的关系图；
图5：本发明较佳实施例的调光玻璃的供电持续时间与恢复透明所需反应时间的关系图。
附图标记说明
S1: 透明阶段
S2: 操作阶段
S3: 切换阶段
1: 液晶材料
2: 基板
V1: 第一电压
V2: 第二电压
T: 持续时间。
 本发明的最佳实施方式
为让本发明的上述及其他目的、特征及优点能更明显易懂，下文列举本发明的较佳实施例，并配合附图作详细说明；此外，在不同图式中标示相同符号者视为相同，会省略其说明。
请参照图1所示，其是本发明调光玻璃切换方法的较佳实施例，包括一个透明阶段S1、一个操作阶段S2及一个切换阶段S3，该切换阶段S3是将该操作阶段S2转换为该透明阶段S1，以切换一个调光玻璃的隐私保护状态为双向透明状态。
请参照图2所示，该调光玻璃可以是将一个液晶材料1注入于透明且可导电的两个基板2之间，该两个基板2分别电性连接电压源以形成电场作用于该液晶材料1，可以控制液晶的排列方向，使光线入射该液晶材料1能够直接通过或形成散射，具有切换该调光玻璃为透明或雾化的作用。在本实施例中，该液晶材料1包括负型液晶及盐类离子，且该两个基板2以垂直配向作用于该液晶材料1，如图2所示，当该两个基板2未通电时，该液晶材料1内的液晶分子垂直该两个基板2整齐排列，使光线能够直接穿透该调光玻璃是一个透明态；当交流电压作用于该两个基板2之间时，液晶分子随电场变化扰动而呈现随机混乱排列，使光线在该液晶材料1多次改变路径后扩散射出是一个散射态。
请参照图1所示，在该透明阶段S1期间，未施加电压于该调光玻璃，使该调光玻璃呈现该透明态，在该调光玻璃的内侧或外侧皆可看见由另一侧穿透的清晰影像。
由该透明阶段S1进入该操作阶段S2，开始对该调光玻璃施加一个交流电，该交流电的振幅是一个第一电压V1，该交流电的频率可以是一般输电网络的常见工作频率，例如：50赫兹或60赫兹，本发明不以此为限。在该交流电维持该第一电压时，该调光玻璃呈现该散射态，通过该调光玻璃可以看到雾化模糊的影像。
由该操作阶段S2进入该切换阶段S3，将该交流电的振幅提升至一个第二电压V2，该第二电压V2大于该第一电压V1，该交流电的频率可以维持不变，该切换阶段S3是将该交流电以该第二电压V2维持一个持续时间T，使该调光玻璃仍呈现该散射态，在经过该持续时间T后，停止供应该交流电而回到该透明阶段S1，使该调光玻璃立即恢复为该透明态。
请参照图3所示，其是本实施例的调光玻璃的雾度值（Haze）与作用于该调光玻璃的电压值的关系图，当作用于该调光玻璃的该交流电提升至15伏特以上，可以使雾度值达到80％～94％，而人的肉眼难以分辨80％以上的雾度值所造成遮蔽效果的差异，故，在该操作阶段S2需要使用该调光玻璃长时间进行隐私保护功能的情况下，选择最低可达到80％以上的雾度值的电压值，可以达到节约电能的作用，请再参照图1及图3所示，在本实施例中，达到雾度值80％的电压值介于10V〜15V之间，因此该操作阶段S2所使用的该第一电压V1可以是15伏特。
请参照图4所示，其是停止施加交流电后本实施例的调光玻璃恢复透明的反应时间与所施加电压值的关系图，在该交流电的振幅为14伏特的情况下，停止对该调光玻璃供电，会导致该调光玻璃需要8.5秒的反应时间才能够由该散射态恢复至该透明态，相较之下，使用大于22伏特的该交流电能够使反应时间降至1秒以下，请再参照图1及图4所示，在本实施例中，该切换阶段S3所使用的该第二电压V2较佳为40伏特，所需要的反应时间为0.36秒。
另外，请参照图1、图3及图4所示，由图4可知，在该交流电小于12伏特的情况下，该调光玻璃恢复透明的反应时间可以低于0.35秒，但是，由图3可知，当该交流电小于12伏特时，该调光玻璃的雾度值不足80％，无法达到完整的隐私保护功能，因此，该操作阶段S2所使用的该第一电压V1，及该切换阶段S3所使用的该第二电压V2皆不会选择低于12伏特的电压值。
请参照图5所示，其是施加于本实施例的调光玻璃的交流电维持40V的持续时间与恢复透明所需反应时间的关系图，请再参照图1所示，在本实施例中，先对该调光玻璃施加15伏特的该交流电并维持10秒，再将该交流电提升至40伏特，并在该持续时间T后停止供应该交流电，如图5所示，当该持续时间T为90毫秒时，该调光玻璃恢复透明所需的反应时间能够降至0.5秒，相较于未将该交流电提升至40伏特而直接在15伏特的情况下停止供电（该持续时间T为0秒），需要将近11秒的反应时间使该调光玻璃恢复透明，该持续时间T为90毫秒以上，能够大幅减少该调光玻璃由该散射态切换为该透明态的延迟情形，并且，由图5可知，使该持续时间T延长超过90毫秒以后，反应时间未有明显下降，因此，该持续时间T较佳为90毫秒。
综上所述，本发明的调光玻璃切换方法，通过对该调光玻璃施加该第一电压的该交流电，可以降低维持该散射态所耗费的电能，并且，通过对该调光玻璃施加该第二电压的该交流电，在该持续时间后停止供电，可以减少该调光玻璃由该散射态恢复至该透明态所需的反应时间，具有降低调光转换延迟、提升调光视觉效果及节省用电量等功效。
虽然本发明已利用上述较佳实施例揭示，然其并非用以限定本发明，任何本领域技术人员在不脱离本发明的精神和范围内，相对上述实施例进行各种更动与修改仍属本发明所保护的技术范畴，因此本发明的保护范围当视权利要求书为准。

Claims (5)

  1. 一种调光玻璃切换方法，其特征在于，包括：
    一个透明阶段，未施加电压于一个调光玻璃，该调光玻璃呈现一个透明态；
    一个操作阶段，对该调光玻璃施加一个交流电，该交流电的振幅维持一个第一电压，该调光玻璃呈现一个散射态；及
    一个切换阶段，在该操作阶段之后，将该交流电的振幅提升至一个第二电压，该第二电压大于该第一电压，该调光玻璃维持呈现该散射态，该切换阶段维持一个持续时间后，停止供应该交流电而回到该透明阶段，该调光玻璃恢复该透明态。
  2. 如权利要求1所述的调光玻璃切换方法，其特征在于，该第一电压是该交流电使该调光玻璃的雾度值达到80％以上的最低电压值。
  3. 如权利要求1所述的调光玻璃切换方法，其特征在于，该第二电压是该交流电停止施加于该调光玻璃而恢复该透明态的最短反应时间的电压值。
  4. 如权利要求1所述的调光玻璃切换方法，其特征在于，该持续时间是该调光玻璃恢复该透明态的反应时间低于0.5秒所需要施加该第二电压的该交流电的最短时间。
  5. 如权利要求1至4中任一项所述的调光玻璃切换方法，其特征在于，该调光玻璃包括两个基板及位于该两个基板之间的一个液晶材料，该两个基板透明且可导电，该液晶材料包括负型液晶及盐类离子。
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