CN111694184A - 一种电焊护目镜用液晶光阀 - Google Patents

一种电焊护目镜用液晶光阀 Download PDF

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CN111694184A
CN111694184A CN201911422377.5A CN201911422377A CN111694184A CN 111694184 A CN111694184 A CN 111694184A CN 201911422377 A CN201911422377 A CN 201911422377A CN 111694184 A CN111694184 A CN 111694184A
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张哲�
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Jiya Shanghai Electronic Sales Co ltd
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    • 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
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    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • 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
    • G02F1/139—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 based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1396—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 based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell

Abstract

本发明公开了一种电焊护目镜用液晶光阀，其包括左旋液晶盒和右旋液晶盒，所述左旋液晶盒和右旋液晶盒内部装满向列相液晶；所述向列相液晶中都添有手性剂；所述右旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.1～0.13g的右旋手性剂CB15，所述左旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.08～0.1g的左旋手性剂S811。本发明中在两个液晶盒中添加适当的手性剂，通过手性剂的作用使得在亮态时，向列相液晶能够排列整齐，光能够从向列相液晶中间穿过从而有效保证了亮态的透光率；而在暗态时，又可以通过通电将向列相液晶打散，使得光不能从向列相液晶中间穿过，保证了暗态的不透光率。

Description

一种电焊护目镜用液晶光阀
技术领域
本发明涉及一种液晶光阀，尤其是一种电焊护目镜用液晶光阀。
背景技术
在电焊过程中，出于保护人眼的目的，电焊护目镜往往透光率低，防止焊接中产生的强烈电弧光灼伤人眼，造成对焊工的眼睛伤害。但是，在实际工作过程中，透光率低的护目镜虽然保护了人眼，却不利于焊工看清工件位置，影响焊接质量。
为了达到在不需要电焊时，透光率高，看清工件位置；在需要电焊时，透光率低，保护眼睛的目的。本领域技术人员进行了探索。部分技术人员提出，采用窄带滤光片过滤光线能起到保护人眼，同时达到看清工件的目的。虽然，采用窄带滤光片可以基本实现上述目的，但窄带滤光片对于电焊弧光的波长范围存在限制以及由此带来的应用范围窄，将不利于窄带滤光片护目镜的大范围应用。
发明内容
本发明要解决的技术问题是提供一种对电焊光弧波长范围没有要求的电焊护目镜用液晶光阀。
为解决上述技术问题，本发明所采取的技术方案是：
一种电焊护目镜用液晶光阀，其包括左旋液晶盒和右旋液晶盒，所述左旋液晶盒和右旋液晶盒内部装满向列相液晶；所述向列相液晶中都添有手性剂；所述右旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.1～0.13g的右旋手性剂CB15，所述左旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.08～0.1g的左旋手性剂S811。
上述的电焊护目镜用液晶光阀，所述左旋液晶盒和右旋液晶盒的中间还设有中间偏光片，左旋液晶盒的另一侧还依次设有上层偏光片和上层低反射膜，右旋液晶盒的另一侧还依次设有下层偏光片和下层低反射膜；所述上层低反射膜和下层低反射膜的反射率均不大于1.5％，透光率均不小于90％，且均没有光延迟。
上述的电焊护目镜用液晶光阀，所述向列相液晶两侧分别设置有液晶取向层，所述液晶取向层的预倾角小于1％。
上述的电焊护目镜用液晶光阀，所述中间偏光片的透光率不小于43.5％，偏光效率不小于99.99％。
采用上述技术方案所产生的有益效果在于：本发明中在两个液晶盒中添加适当的手性剂，在不加电的情况下，通过手性剂的作用，使得液晶扭转整齐，光可以从液晶之间的缝隙中穿过，从而能够保证亮态透光率；在加电的情况下，电流将扭转整齐的向列相液晶搅散，使得光不能从液晶中穿过，保证暗态时不透光，起到保护人眼的目的。本发明具有对电焊光弧波长范围没有要求，应用范围广，可大范围推广等特点。
附图说明
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1是本发明的结构示意图；
图2是向列相液晶中未加电时的扭转情况；
图3是向列相液晶中加电时的扭转情况。
图中各标号表示为：1、上层低反射膜，2、上层偏光片，3、上层玻璃，4、封边胶，5、下层玻璃，6、中间偏光片，7、下层偏光片，8、下层低反射膜，9、液晶取向层。
具体实施方式
参看图1，本发明包括左旋液晶盒和右旋液晶盒，还包括位于左旋液晶盒和右旋液晶盒中间的中间偏光片6、左旋液晶盒上部的上层偏光片2、右旋液晶盒下部的下层偏光片7，以及上层偏光片2上层的上层低反射膜1和下层偏光片7下层的下层低反射膜8。所述左旋液晶盒和右旋液晶盒的液晶盒是由上层玻璃3和下层玻璃5组成，中间装满向列相液晶，液晶盒四周贴有封边胶4，实现对液晶盒的密封。所述左旋液晶盒和右旋液晶盒中都添有手性剂。
本发明中的向列相液晶采用的是石家庄诚志永华显示材料有限公司生产的1MD24800系列。
本发明中所述上层低反射膜1和下层低反射膜8反射率不大于1.5％，透光率不小于90％，且没有光延迟。本发明中所述左旋液晶盒和右旋液晶盒中向列相液晶的两侧分别设置有液晶取向层9，所述液晶取向层9的预倾角小于1％，避免因为预倾角过大造成暗态透光率增加。本发明中所述中间偏光片6的透光率不小于43.5％，偏光效率不小于99.99％。所述上层偏光片2和下层偏光片7的透光率不小于44％，偏光效率不小于98％。
参看图2和图3，通过上述结构，在手性剂的作用下，左旋液晶盒和右旋液晶盒中原有的向列相液晶扭转整齐，在不加电的情况下，光可以从液晶之间的缝隙中穿过，能够保证亮态透光率；在加电的情况下，电流将扭转整齐的向列相液晶搅散，使得光不能从液晶中穿过，保证暗态时不透光，起到保护人眼的目的。为了寻找合适的手性剂的添加比例，满足在亮态时透光率大于36％，工人能够在亮态时看清工件，对准加工位置；暗态时透光率小于0.0019％，能够起到保护人眼的作用。
实施例1-4：本电焊护目镜用液晶光阀采用下述具体的技术方案。
各实施例中所述液晶盒内手性剂的添加量，以及透过率的检测结果见表1。
表1.实施例1-4中手性剂的添加量和检测结果
实施例 CB15/g S811/g 亮态透过率％ 暗态透过率％
1 0.08 0.1 36.12 0.0016
2 0.08 0.11 36.188 0.00157
3 0.08 0.12 36.2 0.00144
4 0.08 0.13 36.08 0.00158
对表1中数据分析可以知道在左旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.08g的手性剂S811时，在右旋液晶盒中按照每100g向列相液晶中添加0.1～0.13g的手性剂CB15的添加比例时，测得亮态透过率是36.08～36.2，都大于36％；暗态时透光率是0.00144％～0.0016％，都小于0.0019％；能够满足亮态时视物，确认焊接位置，暗态时保护人眼的要求。
实施例5-8：本电焊护目镜用液晶光阀采用下述具体的技术方案。
各实施例中所述液晶盒内手性剂的添加量，以及透过率的检测结果见表2。
表2.实施例5-8中手性剂的添加量和检测结果
实施例 CB15/g S811/g 亮态透过率％ 暗态透过率％
5 0.09 0.1 36.21 0.00159
6 0.09 0.11 36.55 0.00144
7 0.09 0.12 36.56 0.00131
8 0.09 0.13 36.18 0.00147
对表2中数据分析可以知道在左旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.09g的手性剂S811时，在右旋液晶盒中按照每100g向列相液晶中添加0.1～0.13g的手性剂CB15的添加比例时，测得亮态透过率是36.18～36.56，都大于36％；暗态时透光率是0.00131～0.00159，都小于0.0019％；能够满足亮态时视物，确认焊接位置，暗态时保护人眼的要求。
实施例9-12：本电焊护目镜用液晶光阀采用下述具体的技术方案。
各实施例中所述液晶盒内手性剂的添加量，以及透过率的检测结果见表3。
表3.实施例9-12中手性剂的添加量和检测结果
实施例 CB15/g S811/g 亮态透过率％ 暗态透过率％
9 0.1 0.1 36.11 0.00161
10 0.1 0.11 36.189 0.00156
11 0.1 0.12 36.21 0.00147
12 0.1 0.13 36.08 0.00159
对表3中数据分析可以知道在左旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.1g的手性剂S811时，在右旋液晶盒中按照每100g向列相液晶中添加0.1～0.13g的手性剂CB15的添加比例时，测得亮态透过率是36.18～36.56，都大于36％；暗态时透光率是0.00147～0.00161，都小于0.0019％；能够满足亮态时视物，确认焊接位置，暗态时保护人眼的要求。
通过分析上述三组试验可以知道，同时满足亮态透光率为36％以上，暗态透光率为0.0019％以下，则需右旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.1～0.13g的手性剂CB15，左旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.08～0.1g的手性剂S811。

Claims (4)

1.一种电焊护目镜用液晶光阀，其包括左旋液晶盒和右旋液晶盒，所述左旋液晶盒和右旋液晶盒内部装有向列相液晶；其特征在于：所述向列相液晶中都添有手性剂；所述右旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.1～0.13g的手性剂CB15；所述左旋液晶盒中添加手性剂的比例是按照每100g向列相液晶中添加0.08～0.1g的手性剂S811。
2.根据权利要求1所述的电焊护目镜用液晶光阀，其特征在于：所述左旋液晶盒和右旋液晶盒的中间还设有中间偏光片(6)，左旋液晶盒的另一侧还依次设有上层偏光片(2)和上层低反射膜(1)，右旋液晶盒的另一侧还依次设有下层偏光片(7)和下层低反射膜(8)；所述上层低反射膜(1)和下层低反射膜(8)的反射率均不大于1.5％，透光率均不小于90％，且均没有光延迟。
3.根据权利要求1所述的电焊护目镜用液晶光阀，其特征在于：所述向列相液晶两侧分别设置有液晶取向层(9)，所述液晶取向层(9)的预倾角小于1％。
4.根据权利要求2所述的电焊护目镜用液晶光阀，其特征在于：所述中间偏光片(6)的透光率不小于43.5％，偏光效率不小于99.99％；所述上层偏光片(2)和下层偏光片(7)的透光率不小于44％，偏光效率不小于98％。
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US4039254A (en) * 1976-05-27 1977-08-02 Mack Gordon Electro-optic welding lens assembly using multiple liquid crystal light shutters and polarizers
US5515186A (en) * 1991-12-26 1996-05-07 Osd Envizion Company Eye protection device for welding helmets which reduces obliquely incident light
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CN103995382A (zh) * 2014-04-23 2014-08-20 河北冀雅电子有限公司 一种电焊护目镜的制造方法

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