Abstract: A battery pack includes a battery pack box with an internal space including a first region to an n-th region, each provided with a battery cell. A positive electrode active substance in a positive electrode of each k-th battery cell includes lithium iron phosphate and/or lithium nickel cobalt manganate having a first discharge voltage plateau and one or more types of supplementary active substances having a second discharge voltage plateau. For the first battery cell to the n-th battery cell, in any case where a sum of a discharge capacity corresponding to the first discharge voltage plateau and a discharge capacity corresponding to the second discharge voltage plateau is 100%, a discharge capacity proportion corresponding to the second discharge voltage plateau of the k-th battery cell is greater than a discharge capacity proportion corresponding to the second discharge voltage plateau of the (k?1)-th battery cell.

Abstract: A battery pack includes a first battery cell, a second battery cell, and a third battery cell. A positive electrode active substance of each battery cell is composed of lithium iron phosphate and a low-temperature additive. The low-temperature additive is selected from compounds containing at least two carbonyl groups, which are conjugated with an unsaturated structure or an atom having lone-pair electrons connected with the carbonyl groups, and a discharging cut-off voltage of the battery pack at a low temperature has the following rules: discharging cut-off voltages V1, V2, and V3 of the first battery cell, second battery cell, and third battery cell range from 1.95V to 2.1V, from 1.8 V to 2.0V, from 1.6V to 1.9V, respectively, and V1, V2, and V3 satisfy a relationship of V1>V2>V3.

Abstract: A positive electrode active material includes an active material A having a composition formula of Lix1Nia1Cob1Mnc1O2-y1Qy1, an active material B having a composition formula of Lix2Nia2Cob2Mnc2O2-y2Qy2, and an active material C having a composition formula of Lix3Nia3Cob3Mnc3O2-y3Qy3, where the subscripts in the formulae are as defined in the description. The active material A has an average particle size Dv50 greater than both an average particle size Dv50 of the active material B and an average particle size Dv50 of the active material C.

Abstract: A single-crystalline-structured low-cobalt ternary positive material, a chemical formula thereof is Li1+x(NiaCobMnc)1-dMdO2-yAy, where a mole fraction of Co element is low. 0.05 ? b ? 0.14; and in a single particle, a ratio of an average Co content per unit area of an outer layer to an average Co content per unit area of an inner core in a cross section passing through a geometric center of the particle is in a range 1.2-5.0:1, optionally, in a range 1.4-2.0:1 is disclosed. The material has better structural stability and dynamic performance at low temperature and high voltage, which improves cycle performance and power performance of the secondary battery at low temperature and high voltage.

Abstract: Embodiments of this application provide an organic light-emitting display panel and a display apparatus. A functional layer disposed on a first substrate in the organic light-emitting display panel includes an emissive layer and an optical filter layer. A pixel define layer is disposed between adjacent organic light-emitting units in the emissive layer. Black light-shielding blocks and color-blocking blocks in the optical filter layer are alternately arranged. The color-blocking blocks and the organic light-emitting units are disposed in a one-to-one correspondence manner. A region between adjacent black light-shielding blocks covers the organic light-emitting unit in a thickness direction of the organic light-emitting display panel. The pixel define layer is a black light-absorbing layer.

Abstract: This application provides a display screen, a display screen protective film, and an electronic device. A transmissive layer of the display screen has a first surface away from a display panel, an orthographic projection of each micro structural unit on the first surface and along a thickness direction is located in a pixel region, and a projection area of the micro structural unit is less than or equal to an area of the pixel region. The micro structural unit may be a curved surface. In this embodiment of this application, the pixel region may include a region in which a sub-pixel is located on the display panel, and a spaced region between the sub-pixel and another sub-pixel that is located around the sub-pixel and adjacent to the sub-pixel. In the foregoing display screen, each micro structural unit mainly bends a display light ray of one sub-pixel. This helps reduce a difference in light refraction degrees between different sub-pixels, and further helps optimize a flash point.

Abstract: A positive electrode plate for secondary battery, a secondary battery, a battery module, a battery pack, and an apparatus are provided. Some embodiments provide a positive electrode plate for secondary battery, where the positive electrode plate includes a positive electrode current collector and a positive electrode active substance layer located on a surface of the positive electrode current collector, the positive electrode active substance layer includes a positive electrode active substance, the positive electrode active substance contains a first lithium-nickel transition metal oxide and a second lithium-nickel transition metal oxide, the first lithium-nickel transition metal oxide contains a first matrix and a first coating layer located on a surface of the first matrix, the first matrix is secondary particles, and the second lithium-nickel transition metal oxide is single crystal particles or particles with quasi-single crystal morphology.

Abstract: A positive electrode plate may include a current collector, a first positive electrode active material layer and a second positive electrode active material layer. The first positive electrode active material layer may comprise a first positive electrode active material, a first binder and a first conductive agent; the second positive electrode active material layer may comprise a second positive electrode active material, a second binder and a second conductive agent. The second positive electrode active material may be selected from carbon-coated Li?Fe?M(1??)PO4, and the second positive electrode active material may have a diffraction peak A between 29° and 30° in the X-ray diffraction pattern, and a diffraction peak B between 25° and 26°, and the intensity ratio IA/IB of the diffraction peaks may satisfy: 0.98?IA/IB?1.1.

Abstract: This application provides a mixed positive electrode material, a positive electrode plate and a preparation method thereof, a battery, and an apparatus. The mixed positive electrode material includes a mixed component consisting of a material of lithium iron phosphate chemical system and a material of ternary chemical system, where the material of lithium iron phosphate chemical system is secondary particles with an average specific surface area within 10 m2/g. In the mixed positive electrode material of this application, the introduction of lithium iron phosphate secondary particles having a low specific surface area improves ease of processing of the mixed positive electrode material, making a slurry less prone to agglomeration and the two materials highly miscible. When the positive electrode plate is prepared by using the mixed positive electrode material of this application, uniform distribution of the positive electrode material on the positive electrode plate can be effectively improved.

Abstract: A display device and driving method thereof and a manufacturing method of a display substrate involve an array substrate and manufacturing method thereof. The array substrate includes: a base substrate; and a number of display sub-pixels arranged in a matrix on the base substrate. Each individual display sub-pixel includes: a pixel electrode; a first common electrode; and a second common electrode; wherein the first common electrode and the second common electrode are insulated from each other; and wherein the pixel electrode is configured to interact respectively with the first common electrode and the second common electrode so as to conduct one or more display operations.

Abstract: A touch panel includes a first substrate, a liquid crystal layer, a second substrate, a first optical detection layer, and a black matrix. The first optical detection layer is over a light-emitting surface of the liquid crystal layer and includes a plurality of first optical detection components, whose orthographic projections on the first substrate are within an orthographic projection of the black matrix. A touch control can be determined based on a change of a first electric signal converted by each first optical detection component based on an intensity of a light transmitting through the liquid crystal layer. The light can be an infrared light. A plurality of second optical detection components can be further disposed over a light-incident surface of the liquid crystal layer to pairingly correspond to, and utilized to determine a touch control along with, the plurality of first optical detection components.

Abstract: A display device and driving method thereof and a manufacturing method of a display substrate involve an array substrate and manufacturing method thereof. The array substrate includes: a base substrate; and a number of display sub-pixels arranged in a matrix on the base substrate. Each individual display sub-pixel includes: a pixel electrode; a first common electrode; and a second common electrode; wherein the first common electrode and the second common electrode are insulated from each other; and wherein the pixel electrode is configured to interact respectively with the first common electrode and the second common electrode so as to conduct one or more display operations.

Abstract: An electrostatic protection device includes: a first conductive layer, a second conductive layer and a polarization film layer, in which the polarization film layer is disposed between the first conductive layer and the second conductive layer and formed of a piezoelectric material which is capable of deforming when applied with electricity; a conductive cantilever, disposed on the second conductive layer and including a free end; and a charge diffusion layer, disposed at a side of the conductive cantilever away from the polarization film layer, electrically connected with the first conductive layer and spaced apart from the conductive cantilever, in which upon a voltage difference between the first conductive layer and the second conductive layer reaching a predetermined value, the polarization film layer deforms to allow the conductive cantilever to connect with the charge diffusion layer.

Abstract: The present application provides a positive electrode sheet for a secondary battery, the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer on a surface of the positive electrode current collector, the positive electrode active material layer includes a positive electrode active material, the positive electrode active material includes a first lithium nickel transition metal oxide and a second lithium nickel transition metal oxide, the first lithium nickel transition metal oxide includes a first substrate and a first coating layer on a surface of the first substrate, the first substrate is secondary particles, and the second lithium nickel transition metal oxide is a single crystal or single-crystal-like morphological particles.

Abstract: A light source device, a backlight module and a liquid crystal display device are provided. The backlight module includes a prism structure, wherein the prism structure includes a substrate, prismatic tooth portions and a transparent sealing portion which are arranged in a stacked manner; and the transparent sealing portion seals the prismatic tooth portions, and the space between the prismatic tooth portions and the transparent sealing portion is a vacuum space.

Abstract: The present disclosure provides a modified positive electrode active material. The modified positive electrode active material comprises a positive electrode active material inner core; a metal oxide layer comprising a metal oxide and coated on a surface of the positive electrode active material inner core; and a polymer layer comprising a polymer and coated on a surface of the metal oxide layer, the polymer being one or more selected from a group consisting of polyacrylic acid, polymethyl methacrylate, polyacrylamide and lithium polyacrylate. The modified positive electrode active material of the present disclosure has better structure stability and thermal stability, when the modified positive electrode active material is applied in the electrochemical energy storage device, cycle performance and safety performance of the electrochemical energy storage device can be significantly improved without decreasing energy density of the electrochemical energy storage device.

Abstract: The present disclosure relates to the field of touch display technology, and in particular, provides a touch display apparatus and a driving method therefor. Specifically, the touch display apparatus includes a first substrate and a second substrate opposite to each other, a light source on a side of the second substrate facing the first substrate, a plurality of touch sensors in an array on a side of the first substrate facing the second substrate, and one or more interference color filters on a side of each touch sensor facing the second substrate. Specifically, the light source is configured to emit light towards each interference color filter. Further, each interference color filter comprises a first sub-interference color filter, a second sub-interference color filter and a third sub-interference color filter configured to output different colors of light respectively.

Abstract: A touch panel includes a first substrate, a liquid crystal layer, a second substrate, a first optical detection layer, and a black matrix. The first optical detection layer is over a light-emitting surface of the liquid crystal layer and includes a plurality of first optical detection components, whose orthographic projections on the first substrate are within an orthographic projection of the black matrix. A touch control can be determined based on a change of a first electric signal converted by each first optical detection component based on an intensity of a light transmitting through the liquid crystal layer. The light can be an infrared light. A plurality of second optical detection components can be further disposed over a light-incident surface of the liquid crystal layer to pairingly correspond to, and utilized to determine a touch control along with, the plurality of first optical detection components.

Abstract: The present disclosure discloses a liquid crystal alignment film, a method for producing the same, a substrate, and a display device. The liquid crystal alignment film includes a polyimide having a fluorine-containing group, wherein the polyimide is polymerized from dicarboxylic anhydride containing one or more fluorine atoms, a C12-20 monoamine and a diamine. The introduction of the long flexible chain and the fluorine-containing group allow the pretilt angle of the polyimide synthesized by the present disclosure to reach 3° to 5°, and the introduction of fluorine element remarkably improves the transmittance of the synthesized polyimide and decreases water absorption. The modified fluorine-containing long flexible chain polyimide material prepared may be used in a liquid crystal alignment film of TFT-LCD, and enhance light transmittance, thermal stability, chemical stability, adhesion, etc. of the liquid crystal alignment film, thereby avoiding related defects caused by polyimide materials.

Abstract: An electrostatic protection device (10) includes: a first conductive layer (110), a second conductive layer (140) and a polarization film layer (130), in which the polarization film layer (130) is disposed between the first conductive layer (110) and the second conductive layer (140) and formed of a piezoelectric material which is capable of deforming when applied with electricity; a conductive cantilever (150), disposed on the second conductive layer (140) and including a free end (152); and a charge diffusion layer (170), disposed at a side of the conductive cantilever (150) away from the polarization film layer (130), electrically connected with the first conductive layer (110) and spaced apart from the conductive cantilever (150), in which upon a voltage difference between the first conductive layer (110) and the second conductive layer (140) reaching a predetermined value, the polarization film layer (130) deforms to allow the conductive cantilever (150) to connect with the charge diffusion layer (170).