Beijing Boe Technology Development Co., Ltd.

Hefei Boe Optoelectronics Technology Co., Ltd.

Beijing Easpring Material Technology Co., Ltd.

Shanshan Li

Sheng Wang

Yafei Liu

Yanbin Chen

Jie Cao

Ming Fang

Xiaofei Zhu

Chengbing Zhu

Shuai He

Shunlin Song

Peilong He

Yeyin Xia

Yiseng Hu

A single crystal multi-element positive electrode material and a preparation method therefor, and a lithium ion battery. The ratio of the length of the longest diagonal line to the length of the shortest diagonal line of the single crystal particles of the single crystal multi-element positive electrode material measured by an SEM is roundness R, and R≥1; and D, Dand Dof the single crystal particles of the single crystal multi-element positive electrode material satisfy: K=(D−D)/D, and the product of Kand R is 1.20-1.40. The single crystal multi-element positive electrode material is more round and regular in morphology, the single crystal particles have uniform size, less agglomeration and less adhesion. The material has the characteristics of high compaction density, good rate capability and excellent cycle performance.

Single crystal multi-element positive electrode material, preparation method therefor, and lithium ion battery

A display panel includes: a base, light-emitting devices, auxiliary light-emitting devices and a texture identification layer disposed above the base. The light-emitting devices are configured to emit light for display. Each auxiliary light-emitting device has a same light-emitting direction as the light-emitting devices and is configured to emit light in response to receiving a control signal during the display panel being in a screen-off state. The texture identification layer is configured to receive reflected light that is reflected to the texture identification layer in light emitted by the auxiliary light-emitting devices to an outside of the display apparatus, so as to perform texture identification.

Display panel, display apparatus and method of controlling the same

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Beijing, China

Shanshan Li