CN103104848B - lamp shade - Google Patents

Abstract

The invention discloses a lamp shade, which comprises a lamp shell, a conical body and an LED lamp source, wherein the lamp shell is of a reflecting bowl structure, the lamp shell comprises an annular plate, the annular plate is provided with a flat buffering part, a multiple reflection part, a secondary reflection part and a primary reflection part, and the curvatures of the flat buffering part, the multiple reflection part, the secondary reflection part and the primary reflection part are sequentially increased; the LED lamp source is fixedly arranged on the lamp shell, the conical body is fixedly arranged above the LED lamp source in a matching mode, the conical body is provided with a parallel reflecting surface, an upward light reflecting surface and an inward light reflecting surface, and the horizontal inclination angles of the parallel reflecting surface, the upward light reflecting surface and the inward light reflecting surface are sequentially increased. According to the lamp shade, the lamp shell is provided with the conical body in a matching mode, primary reflection is carried out by the aid of the parallel reflection surface, the upward ray reflection surface and the inward ray reflection surface, and secondary reflection is carried out by the aid of the structures of the flat retarding part, the multiple reflection part, the secondary reflection part and the primary reflection part, so that light rays emitted from the LED lamp source are more uniform and have no dazzling light feeling.

Description

lamp shade

technical field

The invention relates to the technical field of lighting, in particular to a lampshade for a lamp.

Background technique

Street lamps, car headlights and downlights produce effective light beams, but the conical luminous body cannot meet the design requirements due to the surface treatment process, resulting in more than two times of emitted light and uncontrollable light forming dazzling glare. . Although the light of street lamps is very soft and can illuminate the road for passers-by, the glare it produces will make people unable to see the road clearly, which is one of the main sources of light pollution in the city; The peripheral upward and outward glare of the effectively illuminated light is stronger and more dazzling than the glare of street lamps. Therefore, when the vehicles cross, the drivers and pedestrians who are illuminated on the opposite side often have blurred vision and cannot see the road and vehicles in front of them clearly. The situation, panic often leads to operational errors, and traffic accidents are extremely prone to occur.

Although the existing lighting equipment also has a design to strengthen the light at the side edge, such as Taiwan Patent Announcement No. M306299 LED ring light source structure, it is mainly fixed with a light guide element above the metal cup body, and the inner edge of the upper end of the light guide element has an arc Surface, and a beveled surface is provided around the lower end of the light guide element to provide the scattered and refracted light generated by the LED light source, which can pass through the mirror curvature inside the light guide element and the curved surface, causing the light to form a critical angle total reflection This phenomenon makes the light scattered around the outside of the light guide element, so as to achieve more light source brightness on the side edge of the LED spotlight structure. However, the light scattering and the outside of the light guide element cannot provide long-distance illumination.

Contents of the invention

Based on this, it is necessary to provide a reflection-type non-glare light source to effectively avoid the glare and glare caused by high brightness in a small area, and to achieve a lampshade for effectively concentrating the light source.

In order to achieve the above object, the present invention discloses a lamp, which includes a lamp housing, a cone and an LED light source. The lamp housing is a reflective bowl structure. Around the bottom plate, the annular plate is provided with a gentle portion, a multiple reflection portion, a secondary reflection portion, and a primary reflection portion, and the curvature of the gentle portion, multiple reflection portion, secondary reflection portion, and primary reflection portion increases sequentially. large; the LED light source is fixedly arranged on the base plate, and the conical body is fixedly matched and arranged above the LED light source. The horizontal inclination angles of the parallel reflective surfaces, the upward ray reflective surfaces and the inward ray reflective surfaces increase sequentially.

In one embodiment, the cross-section of the lamp housing is substantially "U"-shaped.

In one embodiment, the cross section of the cone is "V" shaped.

In one of the embodiments, the lower surface of the cone is coated with a reflective layer.

In one of the embodiments, the periphery of the lampshade from top to bottom is an upper focus area, a middle focus area and a lower focus area, the upper focus area and the middle focus area are above the cone, and the lower focus area The area is below the cone, the light emitted by the LED light source is reflected by the lamp housing and the cone and then scattered into the upper focus area, the middle focus area is where the reflected light passes through the blind area, and the light emitted by the LED light source passes through the blind area. The incident light reaches the lower focus area after being reflected by the reflective surface.

In one of the embodiments, the range change of the upper focal area is obtained by adjusting the distance between the cone and the bottom plate.

In summary, the lampshade of the present invention matches the lamp housing with a conical body, and then utilizes the multi-segment curved surface structure of the parallel reflection surface, the upward light reflection surface and the inward light reflection surface designed by the conical body to perform initial reflection, and cooperates with the design of the lamp housing. The flat part, multiple reflection part, secondary reflection part and primary reflection part structure reflect again, so that the light emitted from the LED light source is more uniform and less glare.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the present invention shown in FIG. 1 .

FIG. 3 is a schematic diagram of the principle of the present invention shown in FIG. 2 .

FIG. 4 is a schematic diagram of the principle of light reflection in the present invention shown in FIG. 3 .

Fig. 5 is a schematic diagram of the measurement of the critical projection angle.

Detailed ways

In order to further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 5, the lampshade of the present invention includes a lamp housing 10, a cone 20 and an LED light source 30, the lamp housing 10 is a reflective bowl structure, and the cross section of the lamp housing 10 is roughly "U"-shaped , the lamp housing 10 includes a base plate 11 and an annular plate 12, the annular plate 12 is surrounded by the base plate 11, and the annular plate 12 is provided with a gentle portion 121, a multiple reflection portion 122, and a secondary reflection portion 123 and the primary reflection portion 124 , the curvatures of the gentle portion 121 , the multiple reflection portion 122 , the secondary reflection portion 123 and the primary reflection portion 124 gradually increase sequentially.

The LED light source 30 is fixedly arranged on the bottom plate 11, and the conical body 20 is fixedly matched and arranged above the LED light source 30. The side surface is coated with a reflective layer to reflect the light emitted by the LED light source 30 , reduce the concentration effect of the light emitted by the LED light source 30 , and reduce the concentration phenomenon. The cone 20 is provided with a parallel reflective surface 21, an upward light reflective surface 22 and an internal light reflective surface 23 multi-section curved surface structure, and the horizontal inclination angle of the parallel reflective surface 21, the upward light reflective surface 22 and the internal light reflective surface 23 Increase in order to reflect the light emitted by the LED light source 30 in an orderly manner, so that the light reflected from the parallel reflective surface 21, the upward light reflective surface 22 and the internal light reflective surface 23 can reach the annular plate 12 , the re-reflection of the annular plate 12 is used to scatter the light emitted by the LED light source 30 to reduce the glare effect caused by the direct light of the LED light source 30 .

The periphery of the lampshade of the present invention along the axial direction from top to bottom is an upper focus area 40, a middle focus area 50 and a lower focus area 60, the upper focus area 40 and the middle focus area 50 are above the cone 20, so The lower focusing area 60 is below the cone 20, and the light emitted by the LED light source 30 is reflected by the lamp housing 10 and the cone 20 for many times and then scattered into the range of the upper focusing area 40. By adjusting the cone 20 and the bottom plate 11 intervals to make the range of the upper focus area 40 change; the middle focus area 50 is a blind area where the reflected light passes through, and the light emitted by the LED light source 30 reaches the lower focus area 60 after being reflected by the internal light reflection surface 23 .

After years of theoretical research and practice, the glare principle analysis theory was invented, and the distinction between glare beams and non-glare beams is clarified, that is, the concept of critical projection angle. Controls the throw angle. When the light is projected on the ground greater than the critical projection angle, part of the light (that is, glare) will directly enter the eyes under the normal viewing angle (head-up view); only when the critical projection angle is smaller than the critical projection angle, all the light will not be visible under the normal viewing angle (head-up view). Directly into the eyes, no glare.

The formula for calculating the critical projection angle Φ is: tanΦ=C/(A-B), where A is the distance from the street lamp to the ground, B is the body height of the tester, and C is the vertical distance from the human body to the straight line perpendicular to the ground of the LED light source 30 .

According to the above theory and the tested critical projection angle principle, the present invention designs the lamp housing 10 and the cone 20 in the lamp shade, that is, uses the cone 20 and the lamp housing 10 to control the illumination angle or area of the LED light source 30 to meet the critical projection angle. Projection angle requirements, so that the reflection of the cone 20 and the lamp housing 10 will completely control the irradiation beam within the tested and tested effective lighting range and critical projection angle, so that the effective lighting range can be more uniform in illumination and can change the glare beam. The direction becomes the effective irradiation light, the anti-glare effect is good, and the light pollution can be effectively eliminated to achieve the purpose of anti-glare; through the critical projection angle design, the scattered light in the upper focus area 40 is more uniform and has no glare feeling.

The LED light source 30 of the present invention emits light, and part of the light reaches the range of the lower focus area 60 after being reflected by the internal light reflecting surface 23; reflection to form secondary emission light, four reflection light rays, six reflection light rays and eight reflection light rays. After the light emitted by the source 30 is reflected by the upward light reflection area of the cone 20, it is reflected again by the flat part 121 and the parallel reflection area, reaches the multiple reflection part 122, and is emitted into the upper focal area 40 by using the theory of critical projection angle. The light in the focus area 40 is more uniform without glare; at the same time, the light emitted by the LED light source 30 is reflected by the parallel reflective surface 21 and reaches the secondary reflection area, and then enters the range of the upper focus area 40 after being reflected again in the secondary reflection area.

To sum up, the lampshade of the present invention matches the lamp housing 10 with a conical body 20, and then utilizes the multi-segment curved surface structure of the parallel reflection surface 21, the upward light reflection surface 22 and the internal light reflection surface 23 designed by the conical body 20 to carry out initial Reflection, in conjunction with the design of the lamp housing 10, the structure of the gentle part 121, the multiple reflection part 122, the secondary reflection part 123 and the primary reflection part 124 is reflected again, so that the light emitted from the LED light source 30 is more uniform and less glare .

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (5)

1. a lamp lampshade, it is characterized in that: comprise lamp housing, bullet and LED lamp source, described lamp housing is reverberation bowl structure, described lamp housing comprises base plate and annular slab, described annular slab is located in around described base plate, described annular slab is provided with mild portion, multiple reflections portion, secondary reflection portion and primary event portion, and described mild portion, multiple reflections portion, secondary reflection portion and primary event portion curvature increase successively; Described LED lamp source is fixedly installed on base plate, described bullet is fixed coupling and is arranged on above described LED lamp source, described bullet be provided with parallel reflective faces, on penetrate light reflection face and in penetrate light reflection face, described parallel reflective faces, on penetrate light reflection face and in penetrate light reflection face level inclination increase successively;

Described lamp lampshade periphery is followed successively by focal zone, middle focal zone and lower focal zone from top to bottom, described upper focal zone and middle focal zone are above described bullet, described lower focal zone is below described bullet, the scattering after lamp housing and bullet reflex that emits beam of described LED lamp source enters in upper focal zone, described middle focal zone be reflection ray through blind area, described LED lamp source emit beam through interior penetrate the reflection of light reflection face after arrive lower focal zone.

2. lamp lampshade according to claim 1, is characterized in that: described lamp housing cross section is roughly in " U " shape.

3. lamp lampshade according to claim 1, is characterized in that: the cross section of described bullet is " V " shape.

4. lamp lampshade according to claim 1, is characterized in that: described bullet downside surface is coated with reflector layer.

5. lamp lampshade according to claim 1, is characterized in that: described upper focal zone range is obtained by cone governor body and backplane pitch.