Pixel arrangement display equipment capable of improving color gamut and PPI and evaporation method

Abstract

The invention relates to the technical field of OLED device manufacturing, in particular to pixel arrangement display equipment capable of improving color gamut and PPI and an evaporation method. Triangular R pixels, triangular G pixels and triangular B pixels which can be independently controlled and emit light are sequentially arranged on an evaporation substrate; the adjacent pixels with the same appearance and color are used as independent units; in the independent units arranged in the same row, the number of pixels in the three single-color independent units can be the same, the number of sub-pixels of each independent unit is 3N + 1 or 3N + 2, and N is the arrangement mode of all pixels of a positive integer and the evaporation mode that the same unit is perforated by the same FMM to form a film through evaporation. According to the manufacturing method, the machining is conducted, the deformation is not liable to happen, the color mixing is avoided, the product yield is increased, evaporation alignment Margin is larger, the evaporation process is easy to conduct, the productivity is improved due to the fact that the FMM replacement frequency is reduced, and the FMM cleaningloss is reduced; the OLED display screen with higher pixel density can be produced, and the utilization efficiency of an evaporation material is improved.

Description

technical field [0001] The present application relates to the technical field of OLED device fabrication, in particular to a pixel arrangement display device and an evaporation method that can improve color gamut and PPI. Background technique [0002] In recent years, flat panel displays have been used in various products and fields, and flat panel displays have been required to be larger in size, higher in image quality, and lower in power consumption. Under such circumstances, an organic EL display device equipped with an organic EL element using electroluminescence (ElectroLuminescence) of an organic material is an all-solid-state flat panel display excellent in low-voltage driving, high-speed response, and spontaneous optical activity. , has received a lot of attention. [0003] At present, most OLED devices are produced by using a metal mask (Fine Metal Mask, FMM) to evaporate the EL film layer of RGB pixels. Each FMM opening corresponds to a pixel. The existing mass p...

AI Technical Summary

Problems solved by technology

When the resolution reaches more than 300ppi, this arrangement requires that the openings and connecting bridges (ribs connecting adjacent openings) of the fine metal mask (FMM) are very small, which not only makes the processing of the mask (MASK) very difficult, but also Moreover, the alignment accuracy of the MASK, the shadow of the MASK, and the deformation of the MASK affected by other factors will seriously affect the evaporation of organic light-emitting materials to form a fine colored pixel pattern.

In response to this problem in the industry, leading companies such as South Korea's Samsung are also actively researching new technologies represented by LITI (laser thermal transfer) in order to produce high-resolution OLED displays, but these new technologies still have many shortcomings. It is not yet available for mass production or the yield rate is low in mass production

For example, it is necessary to increase the production process and additional process technology, resulting in low production efficiency; it is necessary to increase equipment and raw materials, and even to develop special raw materials, resulting in increased investment and costs, etc.

Even so, these new technologies struggle to produce ultra-high-resolution displays above 450ppi

At the same time, small FMM pixel openings will also increase the frequency of FMM cleaning in the continuous evaporation process, resulting in reduced production capacity, waste of evaporation materials, and loss of FMM due to increased cleaning times.

Images