Display substrate and display device

Abstract

The invention provides a display substrate and a display device. The display substrate comprises a substrate; and a light-emitting element which is arranged on the substrate; the device further comprises a first optical structure and a second optical structure. The first optical structure and the second optical structure are located on the side, away from the substrate, of the light-emitting element and are spliced. The orthographic projection of the second optical structure on the substrate is farther from the orthographic projection of the light-emitting element on the substrate than the orthographic projection of the first optical structure on the substrate; the orthographic projection of the first optical structure on the substrate is overlapped with the orthographic projection of the light-emitting element on the substrate; the first optical structure is used for reflecting or refracting light rays emitted by the light-emitting element, so that the light rays enter the second optical structure; and the second optical structure is used for enabling the light of the light-emitting element entering the second optical structure to be propagated in the second optical structure along a first direction parallel to the substrate and performing color conversion on the light of the light-emitting element, and the light subjected to color conversion can be emitted from the second optical structure.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a display substrate and a display device. Background technique [0002] microLED (self-illuminating micron-scale light-emitting diode) has the characteristics of small size and high brightness, and has been gradually applied to the display field. [0003] In traditional micro LED displays, LEDs used to form RGB three-color sub-pixels use different materials, which need to be grown on different wafers to form different epitaxial structures, and then transferred to the driving substrate respectively. LED chips made of materials need to be manufactured separately and transferred in stages, which makes the manufacturing and transfer process of micro LED display devices more difficult and hinders the improvement of mass production efficiency. [0004] In addition, due to the different materials used in the RGB three-color LEDs, the light-emitting angle spectrum is differ...

AI Technical Summary

Problems solved by technology

[0003] In traditional micro LED displays, LEDs used to form RGB three-color sub-pixels use different materials, which need to be grown on different wafers to form different epitaxial structures, and then transferred to the driving substrate respectively. LED chips made of materials need to be manufactured separately and transferred in stages, which makes the manufacturing and transfer process of micro LED display devices more difficult and hinders the improvement of mass production efficiency

[0004] In addition, due to the different materials used in the RGB three-color LEDs, the light-emitting angle spectrum is different, which will cause the squint role to be biased when displayed.

At present, color display is realized through LED + color conversion material, but in the case of ensuring a certain light conversion efficiency, the thickness of the color conversion material layer will be relatively thick, which is not conducive to light and thin display; and if the color conversion material layer is made thinner, it will Reduce light conversion efficiency

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