Secrets Of Glass Gradient Process For Huawei And OPPO Mobile Phones

- Oct 16, 2018-

OPPO R17 broke through innovation in the decoration of cover plate, and matched with blue and neon light purple color gradation. After a lot of complex processes, a cover plate can be overlaid with various colors. The body can be sensitive to changes in light and achieve a smooth color gradient effect, which presents a rich multi-color optical effect. Different light and shadow effects can be seen at different angles.


The process of gradient discoloration is going hot in 2018, and OPPO is bringing forth new ideas on the gradual discoloration of the new machine.


In the rapid development of the 3C electronics industry, the major brands in the fierce competition for market, are eager to have a place in the industry. Therefore, in the face of rapidly updated brands, competitive market environment and ever-changing consumer demand, only by maintaining their own continuous innovation and standing at the forefront of the market and consumer requirements can bold design stand in an invincible position. Gradient color is a popular color this year, since huawei P20 was a big seller, it has been more confirmed as a design trend in the past two years.


Current mobile phone shell whether glass, or plastic, can use PVD; So today we're going to talk about the principle of gradient PVD.

There are several main color process options:

1. Pure PVD scheme (pure dielectric film and non-conducting metal dielectric film)

2. PET coloring material (coating)+UV+PVD

3. Four-color printing +UV+PVD

4. Transparent color varnish +UV+PVD(or silk printing nano-metal ink)

5. Raw material dyeing scheme +PVD

6. UV optical dyeing scheme +PVD(or silk printing)

7. Detailed solution of gradient scheme


So how does the gradient work? PVD is English Physical Vapor Deposition (PVD), is refers to under the condition of vacuum, with low voltage, high current arc discharge technology, by use of gas discharge from target material evaporation and evaporation occurs matter and gas ionization, using electric field acceleration, cause the evaporation material and the reaction product Deposition on the work piece.


If a gradient is to be made, a MASK will be added between the target material and the work piece. The corresponding position of the area with large MASK has less film thickness, and the place with small MASK has more thickness. The following figure


The film forming Angle at point a, b, and c is<A><B><C. The distance between the film forming area and the evaporation source da<db<dc, finally leads to a significant difference in thickness of a, b and c three points. There is a slight difference in the refractive index of the material at three points. The macroscopic result is that the light reflected through the film will be different, forming the rainbow color effect as shown in the following figure


Looking at this principle, it is clear that OPPO R170 takes the blue and green segments with the texture; The color in gradient is not difficult, the green color is the most difficult in the pure colors. According to the professional said that the previous gradient is mainly base on blue, purple, red tone. In the color series you see, there is only one pure green and one pure purple product left. In the future, there will be about 10 collections of gradually changing color. With the emergence of new color scheme, the later aesthetic gradually becomes less and less. But recently, xiaomi released a green ceramic phone, I don't know if it will popular. At any rate, texture plus creativity is sure to get less done in the end, as designers struggle to find the next trend.