Micro light emitting diode chip and display device

Abstract

The invention discloses a micro-light-emitting diode chip and a display device, and relates to the technical field of chip design. The main purpose is to stabilize the wavelength of the micro-light-emitting diode chip and realize the gray-scale in the process of controlling the gray scale of the micro-light-emitting diode chip through current. normal display and switching. The main technical solution of the present invention is: a micro light-emitting diode chip, including: a plurality of sub-chips, a plurality of sub-chips are arranged in parallel, each of the sub-chips has a turn-on voltage, at least two sub-chips of the The lighting voltage is different. The micro light emitting diode chip provided by this application, in the process of controlling the gray scale of the micro light emitting diode chip through the current, can gradually change the brightness of the chip under the condition of driving with different driving voltages, and can ensure the current of the micro light emitting diode chip The density remains unchanged, so that while the brightness of the chip is gradually changed, the stability of the wavelength is guaranteed, and the purpose of better switching and displaying gray scales is achieved.

Description

technical field [0001] The invention relates to the technical field of chip design, in particular to a micro light emitting diode chip and a display device. Background technique [0002] With the development of the display industry, the display technology field is committed to the realization of Micro LED and Mini LED display with relatively low technical threshold. [0003] In order to promote this display technology, in addition to the transfer and backplane need to invest energy to break through, the chip side also needs to be improved to realize the adjustment of the gray scale of the display screen to the screen. In order to save costs, the Mini LED and Micro LED parts use active TFT. The driving method needs to directly control the gray scale of the chip through the current. However, due to the quantum well growth and the polarization field of the existing LED chip, the wavelength value will shift under different current densities, which will cause the quantum confinem...

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Problems solved by technology

[0003] In order to promote this display technology, in addition to the transfer and backplane need to invest energy to break through, the chip side also needs to be improved to realize the adjustment of the gray scale of the display screen to the screen. In order to save costs, the Mini LED and Micro LED parts use active TFT. The driving method needs to directly control the gray scale of the chip through the current. However, due to the quantum well growth and the polarization field of the existing LED chip, the wavelength value will shift under different current densities, which will cause the quantum confinement Stark effect. The wavelength of the chip is unstable, which limits the display and switching of gray scales

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