Publish Time: 2019-10-25 Origin: Site
The European Union began to ban the circulation of halogen light bulbs and gradually popularized led, but there are still some people who are confused about whether it is necessary to install a lens to install led, as well as problems such as the focus and astigmatism of LED headlights. In order to discuss the light type, we need to elaborate separately from the requirements of the high and low light type of the automobile headlight, the shape of the lamp cup, the types of the lamp beads, and the installation skills. Any arrogance and prejudice are all generalized. As a professionalLED light bulb manufacturer, Jiuguang lighting hopes to use the knowledge we know to simply elaborate to you, and you can get useful information faster.
I. Requirements for high and low beam types of automobile headlights
Let's start with a brief introduction: Generally speaking, there are two headlights on one side of the car. The inside (near the engine side) is the driving beam and the outside is the passing beam.
As can be seen from the above figure, the low beam reflecting bowl is large and round, and the high beam reflecting bowl is small and steep. Why is it so designed? This is determined by the requirements of the high and low beam types of automobile headlights:
(1). Requirements for low beam of automobile headlight:
The low beam requires wide light paving, obvious tangent line, low left and high right, which does not affect the vision of oncoming drivers, as shown in the following figure:
The above image is the standard low beam type, which is closer on the left side, farther on the right side, lower on the left side and higher on the right side. This design has the advantage of not affecting the vision of the driver coming from the opposite side and harmonious travel.
2. Requirements for high beam of automobile headlight:
The high beam requires focusing and a long distance. The following picture:
You can see that the main beam is two beams, one on the left and one on the right, very focused; this is the effect of Toyota Camry's installation of nine plus one LED headlamp S6, the standard high beam type.
2. The influence of lamp bead types on light type
(2). LED headlamp chips mainly include cob, flip chip, zes chip, Kerui chip, etc. The main features of all kinds of chips: cob chips have many luminous points, uniform illumination, poor penetration, poor concentration, low cost, and relatively low process requirements. This kind of light looks very bright, but sitting in the cab, you will find that this kind of light doesn't shine far; flip chip and zes chip have small luminous point, concentrated light intensity, high brightness, good concentration, strong penetration, but high process requirements and cost; Kerui chip generally refers to Kerui's "xhp50" chip, which is a single high-power chip, difficult to deal with heat dissipation, general power biased Low, low brightness; light intensity is concentrated, paving is not wide, not suitable for low beam.
1. Cob chip
Cob chip has many luminous points, uniform illumination, slightly poor penetration and poor focusing. It can also be accepted when it is used in the low beam. When it is used in the high beam, it will definitely not focus and the light will disperse. Those who say that the shape of LED headlights is good and scattered should be the low-end LED headlights with cob chips installed. Of course, there are other factors. Let's look down.
2. Flip chip
The above figure shows the flip chip used in the mainstream automobile LED headlights. The flip chip has small light-emitting point, concentrated light intensity, high brightness, good concentration and strong penetration.
The LED headlamp with flip chip is used, because the light intensity of the chip is very concentrated, the low beam is tangent even if the original vehicle has no lens, the left side is low and the right side is high, which does not affect the vision of the oncoming driver. The high beam is very focused.
Camry installed nine plus one automobile LED headlamp S6 high and low beam.
III. Influence of lamp bead arrangement on light type
Using flip chip, the arrangement of lamp beads is different, and the effect is different.
As you can see in the picture, it is dedicated to low beam. Please note that the array of chips is rectangular.
Look at the figure below again. It is used for driving beam. Note that the arrangement of chips is square:
The reason for this design is that the requirements of the low beam and the high beam are different. Set the low beam lamp bead as a rectangle, the light shape can be paved wider, and the lighting effect is better; set the high beam lamp bead as a square, the light shape can be more concentrated. 4. The influence of installation skills on the light type will install the same LED headlamp on the same vehicle, and different installers can also install the same LED headlamp. There can be some differences, this is the installation skills on the effect of light. Now the mainstream LED headlights on the market are two-sided. When installing, we must pay attention to placing the two light-emitting points on the left and right sides, not on the top.
IV. Influence of installation skills on light type
When the same LED headlamp is installed on the same vehicle, the effect of different installers may be slightly different, which is the influence of installation skills on the light type effect.
Now the mainstream LED headlights on the market are two-sided. When installing, we must pay attention to placing the two light-emitting points on the left and right sides, not on the top.
Moreover, it is necessary to keep the aluminum lamp post of LED headlamp parallel to the center line of the two lenses in the middle of the reflecting bowl, as shown in the above figure.