A display substrate, a display panel, and a method for manufacturing a display substrate

Abstract

The invention relates to the field of display technology, and discloses a display substrate, a display panel and a manufacturing method of the display substrate. The display substrate includes: a base substrate; a plurality of sub-pixel areas arranged in an array arranged on the surface of the base substrate; an isolation layer arranged on the surface of the base substrate, and the isolation layer includes a dam arranged outside the plurality of sub-pixel areas and a set A plurality of partition dams arranged in parallel in the dam, there is an interval between the end of the partition dam and the dam, and the partition dam divides the multiple sub-pixel regions into multiple channels. When using the inkjet printing method to form the functional layer of the sub-pixel, if the material of the functional layer of the sub-pixel of different colors is the same, ink droplets can be ejected in each channel, and the ink droplets can flow freely in multiple channels until The uniform volume of the ink droplet can greatly reduce the control accuracy of the volume difference between the nozzles, thereby reducing the difficulty of manufacturing the display substrate and further improving the display quality of the display panel.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a display substrate, a display panel and a method for manufacturing the display substrate. Background technique [0002] OLED (Organic Light-Emitting Diode, organic light-emitting diode, referred to as OLED) display is thin, light, wide viewing angle, active light emission, continuously adjustable light color, low cost, fast response, low energy consumption, and low driving voltage. Low temperature, wide operating temperature range, simple production process, high luminous efficiency and flexible display, etc., have been listed as a promising next-generation display technology. [0003] The film-forming methods of each functional layer of OLED mainly include evaporation process and solution process. Evaporation process is relatively mature in the application of small-sized OLEDs, and this technology has been applied to mass production at present; in solution process, the film-f...

AI Technical Summary

Problems solved by technology

[0005] Usually, when the nozzles of the inkjet printing equipment leave the factory, the ink ejection volume of each nozzle cannot be completely guaranteed to be completely consistent. The volume error between nozzles cannot exceed 0.3%. Once the volume error between nozzles is greater than the above range, it will lead to uneven thickness of the functional layer between sub-pixels of the same color, such as figure 2 and image 3 As shown, the human eye can distinguish the resulting difference in luminous brightness between pixels, which will lead to poor brightness uniformity of OLED devices

[0006] At present, manufacturers of inkjet printing equipment generally equip each nozzle with 256 or 512 nozzles. When the resolution of mass-produced OLED display devices is 3840×2160, if a nozzle with 256 nozzles is used, 15 nozzles need to be equipped. In order to complete the monochrome printing in the 3840 direction, and the volume error of the 3840 nozzles must be controlled within 0.3%, for the 256 nozzles to correct the volume error to within 0.3%, it usually takes 3 to 5 hours, it is not difficult to imagine, for the 3840 The calibration of the volume of a nozzle is a long and iterative process, which will consume a lot of time and cost, and once the error exceeds the rated range in the calibration process, it will lead to poor display quality of the OLED device, which will cause users poor experience

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