# US 12,183,224 B2 · Display module and method for driving same, and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,224 B2 - Document ID: US12183224B2 - Status: Granted - Kind: B2 - Application number: 17/785,960 - Filed: 2021-06-30 - Published: 2024-05-23 - Granted: 2024-12-31 - Earliest claimed: 2021-06-30 - Assignees: Beijing Boe Display Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Beijing Boe Display Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Inventors: Song Yang; Pengxia Liang; Ge Shi; Yujie Liu; Zheng Fang; Yanliu Sun; Jiahui Han; Qian Wu; Hongpeng Li - Web page: https://patentgrep.com/patent/US12183224B2 ## CPC - G09G 3/002: {to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT} - G02F 1/133526: {Lenses, e.g. microlenses or Fresnel lenses} - G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)} - G02F 1/133555: {Transflectors} - G02F 1/133616: {Front illuminating devices} - G02F 1/134309: {characterised by their geometrical arrangement} - G02F 1/136209: {Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element} - G02F 1/136227: {Through-hole connection of the pixel electrode to the active element through an insulation layer} - G02F 1/136286: {Wiring, e.g. gate line, drain line} - G09G 3/3413: {Details of control of colour illumination sources} - G09G 3/3426: {the different display panel areas being distributed in two dimensions, e.g. matrix} - G09G 3/3629: {using liquid crystals having memory effects, e.g. ferroelectric liquid crystals} - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G02F 1/133638: {Waveplates, i.e. plates with a retardation value of lambda/n} - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract Provided is a display module. The display module includes: a base substrate, and a plurality of pixel circuits arranged in an array, a plurality of pixel electrodes arranged in an array, a liquid crystal layer, and a light source that are disposed on a side of the base substrate and successively arranged along a direction away from the base substrate; wherein the pixel circuit at least comprises a drive transistor, the drive transistor comprising a gate electrode, a first electrode, and a second electrode; and the pixel electrode at least comprises a reflective electrode. ## Claims ### Claim 1 A display module, comprising: a base substrate; and a plurality of pixel circuits arranged in an array, a plurality of pixel electrodes arranged in an array, a liquid crystal layer, and a light source that are disposed on a side of the base substrate and successively arranged along a direction away from the base substrate; wherein the pixel circuit at least comprises a drive transistor, the drive transistor comprising a gate electrode, a first electrode, and a second electrode; and the pixel electrode at least comprises a reflective electrode; wherein the plurality of pixel electrodes are electrically connected to the plurality of pixel circuits in one-to-one correspondence, and an orthographic projection of at least one of the pixel circuits on the base substrate is within an orthographic projection of a pixel electrode corresponding to the pixel electrode on the base substrate; and the pixel electrode is configured to reflect light transmitted by the liquid crystal layer to the liquid crystal layer, such that the light is exited from a side, distal from the base substrate, of the liquid crystal layer; and the display module further comprises a first planarization layer and a protrusion layer, disposed between the reflective electrode and the pixel electrode, and successively arranged along the direction away from the base substrate, wherein a side, distal from the base substrate, of the protrusion layer is provided with a plurality of protrusions. ### Claim 2 (depends on 1) The display module according to claim 1, wherein the gate electrode of the drive transistor is electrically connected to a gate line, the first electrode of the drive transistor is electrically connected to a data line, and the second electrode of the drive transistor is electrically connected to the pixel electrode; wherein the data line and the gate line are covered by the pixel electrode. ### Claim 3 (depends on 2) The display module according to claim 2, wherein the drive transistor in each of the plurality of pixel circuits disposed in the same column is electrically connected to two data lines; and the two data lines are covered by the pixel electrode. ### Claim 4 (depends on 1) The display module according to claim 1, wherein the pixel electrode further comprises a transparent electrode disposed on a side, distal from the base substrate, of the reflective electrode; and the display module further comprises: a second planarization layer, disposed between the reflective electrode and the transparent electrode; wherein the reflective electrode is electrically connected to the pixel circuit by extending through the protrusion layer and a first via hole in the first planarization layer, and the reflective electrode is electrically connected to the transparent electrode by extending through a second via hole of the second planarization layer. ### Claim 5 (depends on 4) The display module according to claim 4, wherein the first via hole and the second via hole are spaced apart, and an orthographic projection of the first via hole on the base substrate is not overlapped with an orthographic projection of the second via hole on the base substrate. ### Claim 6 (depends on 4) The display module according to claim 4, wherein a protrusive direction of the protrusion is the direction away from the base substrate, and a section of the protrusion perpendicular to the base substrate is arc-shaped, and orthographic projections of the plurality of protrusions on the base substrate are overlapped with the orthographic projection of one of the pixel circuits on the base substrate. ### Claim 7 (depends on 6) The display module according to claim 6, wherein a slope angle of the protrusion is greater than or equal to 30 degrees and less than or equal to 60 degrees; and a ratio of a spacing between each two adjacent protrusions of the protrusions to a diameter of the orthographic projection of each of the protrusions in each two adjacent protrusions of the protrusions on the base substrate is less than or equal to 1. ### Claim 8 (depends on 4) The display module according to claim 4, wherein the plurality of protrusions are arranged in an array; or the plurality of protrusions comprise a plurality of protrusion groups arranged in a first direction, each of the protrusion groups comprising at least two of the protrusions arranged in a second direction, wherein an included angle between the second direction and the first direction is an acute included angle. ### Claim 9 (depends on 4) The display module according to claim 4, wherein a material of the protrusion layer comprises a resin; a material of the reflective electrode comprises a silver metal; a material of the transparent electrode comprises an indium tin oxide; a surface morphology of the side, distal from the base substrate, of the reflective electrode is consistent with a surface morphology of the side, distal from the base substrate, of the protrusion layer; and the reflective electrode comprises a plurality of reflective electrode blocks that are insulatively arranged, wherein one of the pixel circuits is correspondingly covered by each of the reflective electrode blocks. ### Claim 10 (depends on 1) The display module according to claim 1, wherein the liquid crystal layer comprises: a first alignment layer, a liquid crystal molecule, and a second alignment layer that are successively arranged along the direction away from the base substrate; and a support layer disposed between the first alignment layer and the second alignment layer, wherein a thickness of the support layer is greater than or equal to 1 μm and less than or equal to 2 μm. ### Claim 11 (depends on 10) The display module according to claim 10, wherein the liquid crystal layer further comprises: a common electrode, a third planarization layer, a first black matrix layer, a packaging cover plate, and a composite optical film that are disposed on a side, distal from the base substrate, of the second alignment, and are successively arranged along the direction away from the base substrate; wherein an orthographic of the support layer on the base substrate is covered by an orthographic projection of the first black matrix layer on the substrate. ### Claim 12 (depends on 11) The display module according to claim 11, wherein the composite optical film comprises: a linear polarizer, a quarter-wave plate, and a half-wave plate; wherein an included angle θpol between a light absorption axis of the linear polarizer and a target axis, an included angle θ1/2 between a slow axis of the quarter-wave plate and the target axis, and an included angle θ1/4 between a slow axis of the half-wave plate and the target axis satisfy: θpol−2θ1/2+θ1/4=45 degrees. ### Claim 13 (depends on 1) The display module according to claim 1, wherein the light source is a direct-type light source, the direct-type light source comprising: a filling layer, a plurality of light-emitting units, and a plurality of second black matrix layers that are successively arranged along the direction away from the base substrate; wherein an orthographic projection of one of the second black matrix layers on the base substrate is overlapped with an orthographic projection of one of the light-emitting units on the base substrate. ### Claim 14 (depends on 13) The display module according to claim 13, wherein a pixel is formed by each of the pixel electrodes and the common electrode in the liquid crystal layer; and each of the light-emitting units comprises a plurality of light-emitting diodes, an orthographic projection of one of the light-emitting diodes on the base substrate being overlapped with orthographic projections of a plurality of pixels on the base substrate. ### Claim 15 (depends on 13) The display module according to claim 13, wherein each of the light-emitting units comprises a red light-emitting diode, a blue light-emitting diode, and a green light-emitting diode; wherein the red light-emitting diode, the blue light-emitting diode, and the green light-emitting diode in each of the light-emitting units are arranged in a row direction; or the red light-emitting diode, the blue light-emitting diode, and the green light-emitting diode in each of the light-emitting units are arranged in a triangle; or each of the light-emitting units comprises two green light-emitting diodes, wherein the red light-emitting diode, the blue light-emitting diode, and the two green light-emitting diodes in each of the light-emitting units are arranged in a rectangle. ### Claim 16 (depends on 1) The display module according to claim 1, wherein the display module further comprises: a plurality of lenses disposed on a side, distal from the base substrate, of the light source, and arranged in an array; wherein an orthographic projection of one of the lenses on the base substrate is overlapped with orthographic projections of a plurality of pixels in the display module on the base substrate, and the lens is configured to transmit the light. ### Claim 17 (depends on 16) The display module according to claim 16, wherein the reflective electrode is disposed in a focal plane of the plurality of lenses arranged in an array; or a focal length of the lens is greater than or equal to 2 μm and less than or equal to 10 μm; and a pore size of the lens is greater than or equal to 0.5 μm and less than or equal to 1 μm. ### Claim 18 (depends on 1) The display module according to claim 1, wherein the display module further comprises: a light diffusion layer disposed between the liquid crystal layer and the light source. ### Claim 19 (depends on 1) A method for driving a display module, wherein the display module is the display module as defined in claim 1, and comprises a plurality of display partitions successively arranged along a column direction, each of the display partitions comprising a plurality of rows of pixel circuits; the method comprising: supplying a drive signal to the plurality of rows of the pixel circuits in the target display partition row by row for at least one of target display partitions in the plurality of display partitions, wherein the drive signal is configured for the pixel circuit to load a drive voltage to the pixel electrode, the numbers of rows of the pixel circuits in the display partitions are equal, and stages of supplying the drive signal to the pixel circuits in the target display partitions are overlapped. ### Claim 20 A display device, wherein the display device is a near-eye light-field display device, the near-eye light-field display device comprising a display module, wherein the display device comprises: a base substrate; and a plurality of pixel circuits arranged in an array, a plurality of pixel electrodes arranged in an array, a liquid crystal layer, and a light source that are disposed on a side of the base substrate and successively arranged along a direction away from the base substrate; wherein the pixel circuit at least comprises a drive transistor, the drive transistor comprising a gate electrode, a first electrode, and a second electrode; and the pixel electrode at least comprises a reflective electrode; wherein the plurality of pixel electrodes are electrically connected to the plurality of pixel circuits in one-to-one correspondence, and an orthographic projection of at least one of the pixel circuits on the base substrate is within an orthographic projection of a pixel electrode corresponding to the pixel electrode on the base substrate; and the pixel electrode is configured to reflect light transmitted by the liquid crystal layer to the liquid crystal layer, such that the light is exited from a side, distal from the base substrate, of the liquid crystal layer; and the display module further comprises a first planarization layer and a protrusion layer, disposed between the reflective electrode and the pixel electrode, and successively arranged along the direction away from the base substrate, wherein a side, distal from the base substrate, of the protrusion layer is provided with a plurality of protrusions.