CN111219653A - Anti-dazzle installation method for classroom LED blackboard lamp - Google Patents

Anti-dazzle installation method for classroom LED blackboard lamp Download PDF

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Publication number
CN111219653A
CN111219653A CN202010121057.2A CN202010121057A CN111219653A CN 111219653 A CN111219653 A CN 111219653A CN 202010121057 A CN202010121057 A CN 202010121057A CN 111219653 A CN111219653 A CN 111219653A
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CN
China
Prior art keywords
prevents
blackboard
lamp
led
blackboard lamp
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Pending
Application number
CN202010121057.2A
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Chinese (zh)
Inventor
程敏
贺民
俞浙铭
杨远礼
陈海洋
陈建秋
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Cqc Standard Shanghai Testing Technology Co ltd
Original Assignee
Cqc Standard Shanghai Testing Technology Co ltd
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Application filed by Cqc Standard Shanghai Testing Technology Co ltd filed Critical Cqc Standard Shanghai Testing Technology Co ltd
Priority to CN202210422751.7A priority Critical patent/CN114754306A/en
Priority to CN202010121057.2A priority patent/CN111219653A/en
Publication of CN111219653A publication Critical patent/CN111219653A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00Lighting devices intended for fixed installation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00Fastening of light sources or lamp holders
    • F21V19/001Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

The invention relates to the technical field of classroom illumination light environment design, in particular to a classroom LED blackboard lamp anti-glare mounting method, wherein the LED blackboard lamp is mounted in front of and above a blackboard, and the mounting position of the LED blackboard lamp meets the mathematical relation m < h + n + w-teacher height, wherein m is the horizontal distance between the center of a light-emitting opening surface of the blackboard lamp and the blackboard surface, n is the vertical distance between the center of the light-emitting opening surface of the blackboard lamp and the upper edge of the blackboard, h is the vertical distance between the lower edge of the blackboard and a speaking table surface, and w is the width of the blackboard; compared with the prior art, the method for installing the LED blackboard lamp in the current classroom is designed aiming at the lighting environment of the current classroom, the requirement on blackboard illumination and illumination uniformity can be met, discomfort glare generated by the LED blackboard lamp to a teacher can be effectively reduced, the class quality and classroom efficiency of the teacher are improved, and the method is worthy of popularization and application.

Description

Anti-dazzle installation method for classroom LED blackboard lamp
[ technical field ]
The invention relates to the technical field of classroom illumination light environment design, in particular to an anti-dazzle installation method for an LED blackboard lamp in a classroom.
[ background art ]
The reasonable classroom lighting environment is one of the indispensable auxiliary conditions for improving eyesight health. Therefore, classroom lighting reconstruction test points are developed continuously all over the country. Meanwhile, the design of classroom lighting lamp products and the design of classroom light environment also arouse the attention of various manufacturers. The main difficulty of the improvement of the classroom luminous environment is the design and installation method of the blackboard lamp, and the main problem is that the glare generated to teachers is too large, so that the strong reaction of the teachers is caused. Therefore, if aiming at the characteristics of the current LED blackboard lamp and the problem of glare caused by illumination of the blackboard lamp, the installation method capable of preventing the glare is provided, and on the basis of meeting the national standard of blackboard illumination, the method has very important significance for reducing the influence of the glare on teachers.
[ summary of the invention ]
The invention aims to solve the defects and provide the anti-glare mounting method for the LED blackboard lamp in the classroom, so that the requirement on the illuminance and the uniformity of the illuminance of the blackboard is met, the uncomfortable glare of the LED blackboard lamp to a teacher can be effectively reduced, and the class quality and the class efficiency of the teacher are improved.
The anti-glare installation method for the classroom LED blackboard lamp is designed to achieve the purpose, the LED blackboard lamp is installed above the front of a blackboard, the installation position of the LED blackboard lamp meets the mathematical relation that m is less than h + n + w-height of a teacher, wherein m is the horizontal distance between the center of a light outlet surface of the blackboard lamp and the blackboard surface, n is the vertical distance between the center of the light outlet surface of the blackboard lamp and the upper edge of the blackboard, h is the vertical distance between the lower edge of the blackboard and a speaking table board, and w is the width of the blackboard.
Further, the installation position of the LED blackboard lamp meets a mathematical relation that m is less than h + n + w-172, wherein 172 represents that the average height of a teacher is 172 cm, and the units of m, h, n and w are cm.
Furthermore, an included angle theta between a connection line of the light-emitting lower edge point of the LED blackboard lamp and the human eyes and a horizontal line meets the condition that phi/4 is larger than theta and smaller than phi/2.
Compared with the prior art, the invention has the following advantages:
(1) the invention is designed aiming at the current classroom lighting light environment, fills the method for installing the LED blackboard lamp in the current classroom, and can effectively reduce uncomfortable glare of the LED blackboard lamp to teachers under the guidance of the installation method;
(2) the installation method can guide a lamp manufacturer to consider the thought and the direction of light distribution design at the beginning of optical design of the LED blackboard lamp and the size of a beam angle to be considered when the national standard requirement of blackboard illumination is met;
(3) in the relational expression of the invention, 172 represents the average height of a teacher, and the relational expression can be optimized according to the heights of teachers in different schools, so that a specific optimized installation scheme of specific conditions is realized, and a lamp manufacturer can design an LED blackboard lamp and an installation mode for different schools in a customized manner;
(4) the relation of the invention is simple and clear, and the correct installation of the LED blackboard lamp can be easily completed by combining the installation schematic diagram;
in conclusion, when the blackboard lamp is installed according to the method disclosed by the invention, the requirements on the blackboard illumination and the illumination uniformity can be met, the discomfort glare of the LED blackboard lamp on a teacher can be effectively reduced, the class quality and the class efficiency of the teacher are improved, and the method is worthy of popularization and application.
[ description of the drawings ]
FIG. 1 is a schematic view of the vertical field of view and direct glare area of a human eye in accordance with the present invention;
FIG. 2 is a schematic view of the installation of the present invention;
FIG. 3 is a schematic diagram of the relationship between the position of the blackboard lamp and the position of the human eye according to the present invention;
FIG. 4 is a simplified diagram of the positional relationship of the present invention;
in the figure: m is the horizontal distance between the center of the light-emitting surface of the blackboard lamp and the blackboard surface, n is the vertical distance between the center of the light-emitting surface of the blackboard lamp and the upper edge of the blackboard, h is the vertical distance between the lower edge of the blackboard and the speaking table surface, w is the width of the blackboard, 172 is the average height of a teacher and 172 cm, and theta is the included angle between the connection line of the light-emitting lower edge point of the lamp and human eyes and the horizontal line.
[ detailed description of the invention ]
The invention is further described below with reference to the accompanying drawings:
the invention provides an anti-dazzle installation method for an LED blackboard lamp in a classroom, the LED blackboard lamp is installed above the front of a blackboard, the installation position of the LED blackboard lamp meets the mathematical relation m < h + n + w-the height of a teacher, wherein m is the horizontal distance between the center of a light-emitting opening surface of the blackboard lamp and the blackboard surface, n is the vertical distance between the center of the light-emitting opening surface of the blackboard lamp and the upper edge of the blackboard, h is the vertical distance between the lower edge of the blackboard and a speaking table board, and w is the width of the blackboard, and the installation schematic diagram is shown in figure 2. Preferably, the method comprises the following steps: the installation position of the LED blackboard lamp meets the mathematical relation that m is less than h + n + w-172, wherein 172 represents that the average height of a teacher is 172 cm, and m, h, n and w are all in cm, and the installation position can be customized according to different heights of teachers in different schools and can be any value; the included angle theta between the connecting line of the lower edge point of the LED blackboard lamp and the human eyes and the horizontal line meets the condition that phi/4 is larger than theta and smaller than phi/2, so that a direct glare area can be avoided, the interference of direct glare on teachers is reduced, and the class quality and class efficiency of teachers are improved.
The installation method of the present invention was verified as follows:
glare is a phenomenon that brightness distribution in a visual field is not appropriate or brightness variation is too large, so that discomfort is caused or the ability of observing an object is reduced, which is specifically shown in the following steps: when the light source or the reflective surface emits light with extremely high brightness, or the center of the visual field and the background brightness generate a large brightness difference, the brightness difference can reduce the visual function of people and generate discomfort.
As shown in fig. 1, the human eye visual field refers to the spatial range that can be seen when the eyes look straight ahead at a certain point when the head is still. Under the influence of eyebrows and cheeks, the vertical viewing angle limit of a single eye is 130 °, 60 ° above the horizontal plane and 70 ° below the horizontal plane. From the vertical visual area of human eyes, the vertical visual area above the human eyes is an area horizontally upward to form an angle of 60 degrees with the standard sight line, and the area easily generating direct glare is in an area range of 5 degrees to 45 degrees with the standard sight line.
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In combination with the above, the optical design and installation of blackboard fixtures is a major research parameter for optimizing blackboard illumination. Narrow light beam light distribution is realized as far as possible, the installation distance of the blackboard lamp is close to the blackboard as far as possible, the requirements on the illumination intensity and the illumination uniformity of the blackboard are met, and meanwhile, interference glare to teachers is reduced. A schematic position diagram can be drawn according to the position relationship between the blackboard, the blackboard lamp and the teacher, as shown in fig. 2, where m is the horizontal distance between the light-emitting edge of the lamp and the blackboard surface, n is the vertical distance between the light-emitting lower edge of the lamp and the upper edge of the blackboard, and h is the vertical distance between the lower edge of the blackboard and the speaking table. As shown in fig. 3, when the distance between the blackboard lamp and the blackboard is closer or the distance between the blackboard lamp and the upper edge of the blackboard is larger, that is, the angle θ is greater than 45 °, the direct glare area can be avoided, so that the interference of the direct glare to the teacher is reduced.
Because teacher's eyes can dynamic change in the horizontal direction, fix teacher's eyes vision point on blackboard face (most extreme condition), and simplify eyes, blackboard lamp and blackboard into some and line segments, as shown in figure 4, can be seen as the left view in the classroom, use the corner as the original point, regard ceiling and blackboard place wall as x axle and y axle, P (m, a) as the moving point, F point is teacher's eyes position, D is the ground (or the upper edge of podium), theta is the contained angle of blackboard lamp marginal ray and people's eye, A point is blackboard upper edge, B point is blackboard lower limb, P point satisfies following constraint condition:
0<m<DE (1)
0<a<OA (2)
in △ PGF where point P is located, the following are satisfied:
because the area easily generating direct glare for human eyes is 5-45 degrees above the horizontal visual angle, and the actual installation condition of the blackboard lamp is combined, theta needs to meet the following requirements
In the national physical fitness monitoring bulletin of the national sports administration of 2015, the height of 20-59 years old adults is measured, wherein the average height of 20-24 years old adults is the highest in all age groups and is 171.9cm[5]When the worst state is considered, namely, the light irradiated to the lower edge of the blackboard by the blackboard lamp does not enter human eyes right, then:
DF<172 (5)
when BD is h, GA is n, and AB is w, then:
GF=GA+AB+BD-DF (6)
the combined type (1) to (6) can obtain:
m<h+n+w-172 (7)
because the size and the mounting height of the blackboard in different classrooms are not identical, the blackboard lamp needs to be distinguished according to the current situation of the classrooms during light distribution design, and meanwhile, the blackboard lamp is mounted according to the actual situation. When the installation distance of the blackboard lamp meets the formula (7), the eyes of the teacher are not influenced by direct glare or the influence of the direct glare is relatively reduced, and the class quality and the class efficiency of the teacher are improved.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.

Claims (3)

1. The anti-dazzle installation method for the classroom LED blackboard lamp is characterized in that the LED blackboard lamp is installed above the front of a blackboard and is characterized in that: the installation position of the LED blackboard lamp meets the mathematical relation that m is less than h + n + w-height of a teacher, wherein m is the horizontal distance between the center of the light-emitting opening surface of the blackboard lamp and the blackboard surface, n is the vertical distance between the center of the light-emitting opening surface of the blackboard lamp and the upper edge of the blackboard, h is the vertical distance between the lower edge of the blackboard and the speaking table surface, and w is the width of the blackboard.
2. The classroom LED blackboard lamp anti-glare mounting method as claimed in claim 1, wherein: the installation position of the LED blackboard lamp meets the mathematical relation that m is less than h + n + w-172, wherein 172 represents that the average height of a teacher is 172 cm, and the units of m, h, n and w are cm.
3. The classroom LED blackboard lamp anti-glare mounting method as claimed in claim 1, wherein: the included angle theta between the connecting line of the lower edge point of the light emitting of the LED blackboard lamp and the human eyes and the horizontal line meets the condition that phi/4 is larger than theta and smaller than phi/2.
CN202010121057.2A 2020-02-26 2020-02-26 Anti-dazzle installation method for classroom LED blackboard lamp Pending CN111219653A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202210422751.7A CN114754306A (en) 2020-02-26 2020-02-26 Anti-glare mounting method and system for LED blackboard lamp
CN202010121057.2A CN111219653A (en) 2020-02-26 2020-02-26 Anti-dazzle installation method for classroom LED blackboard lamp

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CN202010121057.2A CN111219653A (en) 2020-02-26 2020-02-26 Anti-dazzle installation method for classroom LED blackboard lamp

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CN202210422751.7A Pending CN114754306A (en) 2020-02-26 2020-02-26 Anti-glare mounting method and system for LED blackboard lamp

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113221360A (en) * 2021-05-18 2021-08-06 杭州新三联照明电器有限公司 Classroom writing board lamp installation method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202532318U (en) * 2012-03-10 2012-11-14 上海乾文商贸有限公司 Special multi-curve asymmetric light-distribution single tube lamp for lighting of blackboard in classroom
CN104976551A (en) * 2015-05-20 2015-10-14 杨晓珺 Adjustable blackboard lamp without direct glare

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202532318U (en) * 2012-03-10 2012-11-14 上海乾文商贸有限公司 Special multi-curve asymmetric light-distribution single tube lamp for lighting of blackboard in classroom
CN104976551A (en) * 2015-05-20 2015-10-14 杨晓珺 Adjustable blackboard lamp without direct glare

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113221360A (en) * 2021-05-18 2021-08-06 杭州新三联照明电器有限公司 Classroom writing board lamp installation method

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Application publication date: 20200602