CN204512999U - A kind of LED blackboard lights - Google Patents

Abstract

The utility model discloses a kind of LED blackboard lights, and its structure comprises aluminium matter outside framework, LED light source, PCB, optical lens, reflecting paper, glass mask.Aluminium matter housing inside is provided with groove, for fixing aluminium base and glass mask, LED light source is welded in PCB, described optical lens is installed in PCB, cover in above LED light source, have reflecting paper to be affixed on frame side wall above aluminium base, it is outer and seal outside framework that glass outer is positioned at whole optical system.The utility model provides a kind of LED blackboard lights with polarisation design, for the position characteristics of blackboard and light fixture, by optical lens, secondary light-distribution design is carried out to LED, realize the illuminating effect of optically focused and polarisation, the utilization rate of very big raising luminous energy, keeps the uniformity higher on blackboard surface simultaneously.This blackboard lights structure is simple simultaneously, has higher practicality.

Description

A kind of LED blackboard lights

Technical field

The utility model relates to the LED lamp device for blackboard illumination, particularly relates to a kind of LED blackboard lights that can realize optically focused and polarizing illumination effect.

Background technology

Blackboard is essential in teaching process, and under the condition that light is not good, blackboard illumination, for providing good visual environment, ensures Faculty and Students' writing and reading on blackboard.High-quality blackboard illumination will ensure that the illumination of vertical plane is reasonable, and the uniformity is high, and riding position is suitable, and does not produce uncomfortable dazzle.Most classroom there is no the light fixture being exclusively used in blackboard illumination, and Frame lamp uses comparatively extensive, and common problem comprises: illumination is inadequate, brightness uniformity is poor, reflected glare is serious, capacity usage ratio is low, and illuminating effect is difficult to reach relevant criterion requirement.

CN200710049769 discloses a kind of blackboard lights of dual reflector, and whole lamp body comprises two fluorescent lamps and two paraboloids, and the irradiating angle of light source is different, two reflectors respectively with blackboard at an angle, be responsible for the zones of different of lightening blackboard.

CN201120205735 discloses a kind of blackboard lights, strip lamp is under the effect of the reflective groove of curved surface, and light direction is adjusted, and the light that lighting device projects reflective groove is reflected onto on blackboard, and make light successively decrease with rule from the near to the remote, reach the effect improving blackboard uniformity of illuminance.The light source that this utility model requires is fluorescent tube or 360 ° of luminous LED lamp tube, and the selection of light source has limitation, and curved design is meticulous simultaneously, and design difficulty is comparatively large and capacity degree is lower.

CN201484750 U discloses a kind of grid blackboard lights, is furnished with reflector in fluorescent tube side, and lampshade opening portion is by flase floor, and in order to improve the poly-property of light source, the illumination of blackboard surface and uniformity of illuminance, this use is novel is also carry out optical design for fluorescent tube.

Utility model content

The utility model provides the LED blackboard lights of a kind of specular removal, low dazzle, high evenness.By optical lens, secondary optical design is carried out to LED, realize the luminous intensity distribution meeting blackboard lighting requirement, coordinate and improve LED light effect further with reflective sheeting.

The LED blackboard lights that the utility model proposes, comprise: glass mask 1, optical lens 2, reflecting paper 3, aluminium matter lamp body housing 4, PCB 5 and LED light source 6, wherein: aluminium matter lamp body housing 4 inside is provided with groove structure, described groove structure is used for fixing PCB 5 and glass mask 1, described LED light source 6 is welded in PCB 5, and optical lens 2 covers in above LED light source 6; Described reflecting paper is affixed on above PCB 5, and is positioned at the sidewall of aluminium matter lamp body housing 4 groove structure; Described optical lens 2 is free-form surface lens, and comprise inner chamber and exocoel, described inner chamber is rotational symmetry structure, and comprising with bottom surface is the intracavity sidewall on inclined-plane, and the inner chamber top-surface camber outstanding downwards between two intracavity sidewalls; The exit facet of described exocoel is rotational symmetric free form surface structure; The light-emitting window of the LED light source on LED light source 6 aims at inner chamber top-surface camber, and inner chamber top-surface camber covers the angle of most of LED light source light-ray condensing, and intracavity sidewall adopts frosted structure; The exocoel of described optical lens adopts free form surface structure, and the exit portal of inner chamber top-surface camber aims at exocoel top-surface camber.

In the utility model, described LED light source is positioned at the center of optical lens inner chamber bottom surface, and optical lens inner chamber bottom center does not overlap with optical lens exocoel bottom center.

In the utility model, described optical lens intracavity sidewall adopts frosting or shiny surface.

In the utility model, the lower part 202 of described exocoel top-surface camber adopts frosting.

Optical lens described in the utility model, by optical design targetedly, realizes the light-out effect that optically focused polarisation is integrated.For prior art, optical design object changes single LEDs light source into from whole fluorescent tube, and design process is more flexible.LED light source is welded in PCB, according to the illumination requirement of reality, select the number of LED light source flexibly, optical lens covers in above LED light source simultaneously, above PCB, sidewall posts reflecting paper, for the secondary calibration of optical lens side emergent ray.Glass mask is positioned at outside whole optical system, for optical texture in printing opacity and guard lamp.

In the utility model, described optical lens adopts special interior exocoel curved design, carries out secondary light-distribution design to the light of LED light source.Wherein, the inner chamber of lens and plane of light incidence are divided into top-surface camber and side, and by the class lambert light emitting species of LED, inner chamber top-surface camber covers the angle that most of LED light line is assembled, and carries out preliminary convergence process to these principal rays.Intracavity sidewall adopts frosted structure, reduces the light dispersed to wide-angle from the outgoing of lens sidewall.The positive camber of lens adopts special Random Curved Surface Designing, and distribute further the light after inner chamber refraction, the light after outgoing can reach the spotlight effect of 10 °-20 °.The inner chamber of optical lens does not overlap with the bottom center of exocoel, realizes last polarization effect in this form.

Further, described reflecting paper is positioned on the sidewall above PCB, for adjusting the high angle scattered light of lens profile outgoing.

Accompanying drawing explanation

Fig. 1 is the whole modulated structure figure of LED blackboard lights;

Fig. 2 is the profile of optical lens 2, and wherein the lower part 202 of exocoel top-surface camber and intracavity sidewall 205 part, do frosted process in certain embodiments.

Fig. 3 is the light distribution of LED after optical lens.

Fig. 4 is the profile of LED after optical lens and reflecting paper.

Fig. 5 is the distribution curve flux of whole lamp.

Number in the figure: 1 is glass mask, 2 is optical lens, and 3 is the reflecting paper of sidewall, and 4 is aluminium matter housing, 5 is PCB, and 6 is LED light source, and 201 is exocoel top-surface camber, and 202 is the lower part of exocoel top-surface camber, 203 is the bottom surface of optical lens, and 204 is inner chamber top-surface camber, and 205 is intracavity sidewall.

Detailed description of the invention

Below in conjunction with example, the utility model is elaborated, be used for explaining the utility model at this schematic diagram of the present utility model and explanation, but not as to restriction of the present utility model.After the lighting device having read the utility model explanation, change the utility model, these equivalent form of values are said at these claims within the scope of restriction equally.

Embodiment 1: a kind of bar-shaped LED blackboard lights with polarisation design disclosed in figure the utility model, shown in Fig. 1, its structure comprises glass mask 1, optical lens 2, reflecting paper 3, aluminium matter lamp body housing 4, PCB 5 and LED light source 6.Aluminium matter lamp body housing 4 inside is provided with groove structure, for fixing PCB 5 and glass mask 1; LED light source 6 is welded in PCB 5, and optical lens 2 is free-form surface lens, covers on LED light source 6; Reflecting paper 3 is attached to above PCB 5, and is positioned at the sidewall of aluminium matter lamp body housing 4 interior grooves structure.

The inner chamber of optical lens described in the utility model is rotational symmetry structure, structural principle is, according to the class lambert principle of luminosity of LED, the top-surface camber of inner chamber shown in Fig. 2 202 assembles LED light source light major part light, make the exocoel top-surface camber 201 of its directive optical lens, by the optical design that this is special, by the dead ahead of light-ray condensing to light fixture, realize spotlight effect.Intracavity sidewall 205 uses frosted process, changes the incident direction of remaining LED light source light.The exocoel of this optical lens is free outgoing curved surface, assembles process further, realize the convergent effect of illumination to light.Rim ray principle is followed in the design of this exocoel top-surface camber, can as required, the structure of fine setting curved surface, thus changes the convergence angle of single LEDs light source, is controlled within the scope of 10 °-20 ° by rising angle.Wherein the lower part 202 of exocoel top-surface camber also can do frosted process, changes the emergent ray of optical lens side, reduces the loss of side light.The inner chamber bottom surface of this optical lens and exocoel-bottom center do not overlap, to realize drift angle to a certain degree.

The light that light source is launched, through described optical lens, is carried out constraint and guides, be irradiated to the region of specifying by each LED light source light source.Single optical system can realize the spotlight effect within the scope of 10 °-20 °.Except light-focusing function, this optical lens also designs with polarisation.When light fixture is installed with certain inclination angle, no longer parallel between the exiting surface of light fixture and vertical blackboard surface, the light distribution on blackboard also can change because of inclination angle.In the utility model, light fixture aspect realizes polarisation design in advance, by the light distribution of single optical lens as shown in Figure 3, light oblique illumination to blackboard surface realizes comparatively high evenness, this is core of the present utility model to LED.

The light of reflecting paper described in the utility model to lens profile outgoing has further converging action, as shown in Figure 4, can reduce the loss of side light.In addition have employed the lamp body of aluminum material, coordinate with the good glass mask of light transmittance.LED blackboard lights of the present utility model is arranged on the top of distance blackboard certain level position, suitable inclination angle selected by light fixture, the optically focused of its uniqueness and polarisation design, the distribution curve flux of final whole lamp as shown in Figure 5, while improving the efficiency of light energy utilization, ensure that the illuminance uniformity on blackboard surface when light fixture exists certain inclination angle.

Claims (4)

1. a LED blackboard lights, comprise: glass mask (1), optical lens (2), reflecting paper (3), aluminium matter lamp body housing (4), PCB (5) and LED light source (6), it is characterized in that: aluminium matter lamp body housing (4) inside is provided with groove structure, described groove structure is used for fixing PCB (5) and glass mask (1), described LED light source (6) is welded in PCB (5), and optical lens (2) covers in LED light source (6) top; Described reflecting paper is affixed on PCB (5) top, and is positioned at the sidewall of aluminium matter lamp body housing (4) groove structure; Described optical lens (2) is free-form surface lens, comprises inner chamber and exocoel, and described inner chamber is rotational symmetry structure, and comprising with bottom surface is the intracavity sidewall on inclined-plane, and the inner chamber top-surface camber outstanding downwards between two intracavity sidewalls; The exit facet of described exocoel is rotational symmetric free form surface structure; The light-emitting window of LED light source (6) aims at inner chamber top-surface camber, and inner chamber top-surface camber covers the angle of LED light source light-ray condensing, and intracavity sidewall adopts frosted structure; The exocoel of described optical lens adopts free form surface structure, and the exit portal of inner chamber top-surface camber aims at exocoel top-surface camber.

2. LED blackboard lights according to claim 1, is characterized in that described LED light source is positioned at the center of optical lens inner chamber bottom surface, and optical lens inner chamber bottom center does not overlap with optical lens exocoel bottom center.

3. LED blackboard lights according to claim 1, is characterized in that described optical lens intracavity sidewall (205) adopts frosting or shiny surface.

4. LED blackboard lights according to claim 1, is characterized in that the lower part (202) of described exocoel top-surface camber adopts frosting.