OLED-based automobile tail lamp and preparation method thereof

Abstract

The invention relates to the technical field of automobile tail lamps, in particular to an OLED-based automobile tail lamp and a preparation method thereof. The automobile tail lamp comprises a red mask and a lamplight module arranged on the inner surface of the red mask; or the lamp comprises a lamplight module taking the red mask as a substrate; a light source of the lamplight module is an OLED.The lamplight module comprises a steering lamp module; the steering lamp module comprises a substrate, an anode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer which are sequentially arranged in a stacked mode. The light emitting wavelength of the steering lamp module ranges from 570nm to 590nm. By adjusting functional groups of the OLED light-emitting material, the light-emitting wavelength of the steering lamp module is controlled at 570-590nm, on the premise that the red mask is used, the light color of the steering lamp is still yellow, and the requirements of national laws and regulations are met.

Description

technical field [0001] The invention relates to the technical field of automobile tail lights, in particular to an OLED-based automobile tail light and a preparation method thereof. Background technique [0002] From a functional point of view, the basic composition of a car tail light includes: position lights, brake lights, turn lights, reversing lights and rear fog lights; from an installation point of view, the above functions can be integrated in one assembly or in two assemblies in. In the case of the two assemblies, position lamps, brake lamps and turn signals are frequently used functions, which can often be integrated in assemblies with a higher installation height, while reversing lamps and rear fog lamps are used less frequently. Can be integrated in assemblies with a low installation height, such as under bumpers. [0003] In the development route of automobiles, the development of styling and exterior decoration is a very important part. For car taillights, t...

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Problems solved by technology

[0004] National regulations require the color of the turn light to be yellow. When the yellow light source passes through the red mask, a large amount of yellow light will be absorbed by the red mask, resulting in failure to pass the regulations.

The common red mask has a strong absorption of light with a wavelength greater than 600nm. figure 1 The absorption spectra of four common red plastic parts are given. When the turn signal uses a halogen light source, a transparent mask has to be used, because the emission spectrum of the halogen light source is relatively fixed, around 600nm; when the turn signal uses an LED light source In most cases, transparent masks are also used, because for short-wavelength pure yellow LEDs, the cost is high and it is not easy to realize. The combination of light needs to be in the assembly of a car taillight. The outer cover is made of red and transparent parts, which not only greatly reduces the aesthetics, but also causes a significant increase in cost due to two-color injection molding.

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