Light-emitting blackboard

A technology of blackboard and light guide plate, which is applied in the field of backlight, can solve the problems of unnatural luminous handwriting on luminous blackboards, large visual damage, etc., and achieve the effect of reducing visual damage, less fatigue, and comfortable fatigue

Inactive Publication Date: 2018-10-12
RANZON INNOVATION HLDG SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a luminous blackboard, aiming to solve the technical problems of the existing luminous blackboards that the luminous handwriting is unnatural and the eyesight is greatly damaged

Method used

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] It should be noted that when a component is referred to as being “fixed on” or “disposed on” another component, it may be directly or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are for convenience of description only, rather than indicating or implying the referred device Or ele...

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Abstract

The invention is applicable to the technical field of backlight, and provides a light-emitting blackboard. The light-emitting blackboard comprises a frame body with an accommodating cavity, a light guide plate arranged in the accommodating cavity of the frame body, and light source assemblies arranged on at least one side of the light guide plate; the light source assemblies comprise at least oneLED light source, and the LED light sources emit quasi-natural light; and the blue light color ratio in the quasi natural light is less than 5.7%, and the relative spectral power of the 440 nm blue light is lower than 0.65. According to the light-emitting blackboard, the LED light sources are used to form the light source assemblies, the light source assemblies are arranged on the side surfaces ofthe light guide plate, the LED light sources emit the quasi-natural light, the blue light color ratio in the quasi-natural light is less than 5.7%, and the relative spectral power of the 440 nm bluelight is lower than 0.65, so that the blue light color ratio and the relative spectral power of the 440 nm blue light are reduced; and in addition, the rendering index of the light ray with the wholespectrum is relatively high so that the problems of color weakness and the like cannot be caused when a user watches the blackboard for a long time, and the eyesight damage to the user of the light-emitting blackboard can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of backlight technology, in particular to a luminescent blackboard. Background technique [0002] The luminous blackboard is a new type of blackboard based on the total reflection light guiding ability of the light guide plate. It has been gradually developed in the past few years and can be used in teaching work. The light source is arranged on the side of the light guide plate. When there is no writing on the upper surface of the light guide plate, the light is limited inside the entire light guide plate due to the total reflection on the light guide plate and the lower two surfaces, and will not shoot out of the blackboard surface. Titanium dioxide powder mixed in resin solution) When writing on the surface of the blackboard, the original total reflection of part of the light is destroyed at the coating on the surface of the light guide plate, and the light can refract from the surface of the light guide plate int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L1/04
CPCB43L1/006B43L1/04
Inventor 曾灵芝曾骄阳陈俊达陈道蓉曾胜
Owner RANZON INNOVATION HLDG SHENZHEN CO LTD
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