Organic light emitting diode display device and manufacturing method thereof

Abstract

The present invention discloses an organic light emitting diode display device and a manufacturing method thereof. The organic light emitting diode display device comprises a base plate comprising a substrate. A thin film transistor circuit layer is arranged on the substrate and has a control circuit; at least one groove is provided on the thin film transistor circuit layer; the bottom of the groove is provided with an electron transport layer; and at least one groove is filled with an auxiliary cathode layer. An anode layer is arranged on the thin film transistor circuit layer; a luminescentlayer is uniformly arranged on the anode layer; and the electron transport layer is also arranged on the luminescent layer. The cathode layer covers the electron transport layer and the auxiliary cathode layer, thereby the complexity of the thin film transistor circuit layer is avoided; the flatness of the pixel surface is ensured and the product yield is improved.

Description

technical field [0001] The invention relates to the field of display panels, in particular to an organic light emitting diode display device and a manufacturing method thereof. Background technique [0002] Organic Light-Emitting Diode (OLED) has become the most promising new display device in recent years due to its advantages of self-luminescence, all-solid-state, high contrast, etc. [0003] At present, the application direction of OLED includes RGB OLED technology composed of red (Red, R), green (Green, G), blue (Blue, B) and other three primary color pixels (pixels) arranged side by side (Side by Side), and white light OLED (WhiteOLED) plus color filter (Color Filter, CF) technology two categories. The products are mainly divided into small-sized mobile phones, tablet computer (Pad) screens and larger-sized TV (Television, TV) screens. [0004] In the direction of large-size OLED applications, the products currently on the market are concentrated in the bottom (Bottom...

AI Technical Summary

Problems solved by technology

[0008] First, adding the auxiliary cathode to the circuit layer of the thin film transistor will increase the complexity of the circuit layer of the underlying thin film transistor, which may cause problems such as short circuit

[0009] Second, adding an auxiliary electrode below the pixel will be detrimental to the flatness of the pixel surface

[0010] Third, when using the auxiliary cathode, it is necessary to burn in to break down the electron transport layer. This process is relatively uncontrollable, which is not conducive to the consistent repeatability of the device.

[0011] Specifically, such as figure 1 The display device of the prior art shown is a large OLED display device with a long side of 130 cm and a wide side of 90 cm. The electrode interface 1 is arranged around the screen 2. Farther away, long-distance current transmission will increase the partial voltage of the cathode, which will cause a difference in the number of carriers injected into the OLED elements at the edge of the screen 2 and the center area 3 of the screen. On the one hand, the brightness of the center area 3 of the screen will be lower. Dark, on the other hand will increase the problem of energy consumption

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