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Panel lamp structure design and precautions

LED backlight derived LED flat light, its light uniform, no glare, the structure of fine, has been a lot of people love, I through 2 years of flat lamp design and development, talk about the design of flat lamp and precautions, hope to We can help.

Surface light source structure mainly has the following materials:

Aluminum frame

Appearance structure, and LED cooling the main structure – the general use of AL6063, aluminum extrusion die, pre-cost low input, surface treatment beautiful, good heat dissipation, a few days ago to see the show also found a manufacturer began to die-casting the framework, so IP level Can do a little higher, and the closure of light better, the overall appearance, but the higher cost of pre-injection mold

2. Diffusion plate

The light guide plate light evenly spread out, as well as play a role in blocking the network – the proliferation of the general use of acrylic 2.0 sheet or PC material, the lower the cost of acrylic and light transmission than the PC slightly higher, acrylic crisp anti-aging Performance is weak, PC prices are slightly more expensive, but anti-aging performance. Diffuse plate can not be seen after the installation of outlets, and the light transmission rate to about 90%. Acrylic transmittance at 92%, PC 88%. We can according to the needs of the choice of diffusion plate material, the general use of acrylic materials

3. Light guide plate

The side of the LED light through the dot refraction to change the light angle out – light guide plate is the heart of flat lights, network design is very important, the network design is not good, see the overall light effect is very poor, generally appear 1. middle light, Two dark side 2. into the light side of the bright side, the middle dark 3. standing in different angles, the overall brightness is inconsistent 4. Local dark area obvious. Light guide plate of the light effect of a large part of the design in the network, followed by the selection of the plate, but blindly pursue the brand plate is wrong, because many brands like Japan’s Mitsubishi, most of its good plate are People ordered a good, many of the market out of the Mitsubishi plate for some scrap, the light transmission rate is not as high as their own plate, so the choice of plate does not necessarily look at the plate manufacturers, as long as the test light transmittance high efficiency OK, In fact, it can

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4. reflective paper

The light guide plate on the back of the remaining light reflected – usually RW250

5. rear cover

Sealed lamp body – generally AL aluminum, the overall texture is strong, and can play a little heat dissipation

6.LED light source

The general use of 3528 also used 5630 and 5050,5630 and 5050 light efficiency is not high and the network design is difficult, versatility is poor, but the cost is low. 3528 luminous efficiency of high network point of versatility, generally just do can directly buy other home light guide plate use, do not need to re-proofing design

7. Drive the power supply

Lamp drive – there are two kinds of power supply 1. Direct use of cross-flow power (this mode is high efficiency, PF value of up to 0.95, cost-effective) 2. Constant pressure with cross-flow mode (stable performance, but low efficiency, high cost) This model is designed for customers who require certification, because the lamp is 24V input low-voltage lamps, do not need to do security, direct use of safety power can be shipped to various countries.

In the design process of production need to pay attention to the problem

1. The thermal plastic to be thinner the better, it is best to use their own sticky thermal plastic, or will affect the thermal conductivity.

2. Diffusion plate selection, and now the market to do a lot of flat-panel lights are generally selected smooth surface plus matte diffusion plate, this diffusion plate has a drawback, static electricity, in the production process easy to produce a bright spot, and in the Long-term use of dust through a variety of ways into the lamp body, will cause the lamp highlights intensive. In the early days of the use of double-sided diffusion of the diffusion plate, this diffuser light guide effect is good, static small, dust can enter the lamp into the bright spot effect, but this diffuse plate light transmittance is only 85-88% , Whether it is necessary to use this depends on the meaning of their own design.

3.LED selection, as far as possible the use of high efficiency of the lamp, because the side of the light plate in the cooling and luminous flux output are limited, the power of the heat will have an impact, and low luminous efficiency.

4. into the smooth surface in the sticky reflective paper as far as possible not to glue, glue will absorb light, and easy to appear into the light side of the bright side, but a large area of ​​the light guide plate is required to stick a little, or there will be dark, because the reflective paper Sticky, loose in the lamp body will appear such a warping situation.

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