Light-emitting substrate, display device, and method for driving the light-emitting substrate

Abstract

A light-emitting substrate is provided. The light-emitting substrate includes: a plurality of light-emitting control units arranged in M ​​rows and N columns, M is an integer greater than or equal to one, and N is an integer greater than or equal to one. A corresponding column of the N columns of light-emitting control units includes: M groups of second voltage signal lines, a corresponding group of the M groups of second voltage signal lines is connected to a corresponding one of the M light-emitting control units, and the corresponding group of the M groups of second voltage signal lines includes k second voltage signal lines, and k is an integer greater than or equal to one.

Description

Technical Field

[0001] The present invention relates to display technology, and more particularly, to a light-emitting substrate, a display device, and a method for driving the light-emitting substrate. Background Art

[0002] A front-lit reflective display is a display that is illuminated by a front light. Typically, a front-lit reflective display is a liquid crystal display that would otherwise be seen in ambient light. Having a front light improves display performance. Summary of the invention

[0003] In one aspect, the present disclosure provides a light-emitting substrate, comprising: a plurality of light-emitting control units arranged in M ​​rows and N columns, M being an integer greater than or equal to one, and N being an integer greater than or equal to one; wherein the corresponding columns in the N columns of light-emitting control units comprise: M groups of second voltage signal lines, the corresponding groups in the M groups of second voltage signal lines being connected to the corresponding one of the M light-emitting control units, the corresponding group in the M groups of second voltage signal lines comprising k second voltage signal lines, k being an integer greater than or equal to one; wherein the corresponding one of the plurality of light-emitting control units comprises: p sub-units, p being an integer greater than or equal to one; p first voltage branch signal lines respectively connected to the p sub-units; p groups of second voltage branch signal lines, the corresponding groups in the p groups of second voltage branch signal lines comprising k second voltage branch signal lines; wherein the p first voltage branch signal lines are electrically connected; and the k second voltage branch signal lines are respectively electrically connected to the k second voltage signal lines in the corresponding groups in the M groups of second voltage signal lines.

[0004] Optionally, the corresponding one of the multiple light-emitting control units includes a plurality of light-emitting elements arranged in m rows and n columns, m is an integer greater than or equal to p, and n is an integer greater than or equal to one; the Pth subunit among the p subunits includes n columns of light-emitting elements, 1≤P≤p; the first ends of the n columns of light-emitting elements in the Pth subunit are commonly connected to the Pth first voltage branch signal line among the p first voltage branch signal lines; and the corresponding second ends of the n columns of light-emitting elements in the Pth subunit are connected to one of the k second voltage branch signal lines in the Pth group of the p groups of second voltage branch signal lines.

[0005] Optionally, each column of the n columns of light emitting elements in the corresponding one of the plurality of light emitting control units includes a plurality of rows of light emitting elements electrically connected in series.

[0006] Optionally, the multiple rows of light emitting elements in a corresponding column among the n columns of light emitting elements have the same color.

[0007] Optionally, the corresponding one of the n columns of light-emitting elements includes light-emitting elements of the Kth color among k different colors, 1≤K≤k; and the light-emitting elements in the (n / k)th column of the n columns of light-emitting elements have the Kth color.

[0008] Optionally, the second ends of the (n / k) columns among the n columns of light emitting elements are commonly connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in the Pth group among the p groups of second voltage branch signal lines.

[0009] Optionally, m is (x*p), and n is (y*k), wherein x is an integer greater than one, and y is an integer greater than one.

[0010] Optionally, the n columns of light emitting elements in the Pth subunit include y groups of columns; the Yth group in the y groups of columns includes k columns of light emitting elements having k different colors respectively, 1≤Y≤y; and the color patterns in the y groups of columns are the same.

[0011] Optionally, k=3.

[0012] Optionally, the light emitting substrate further comprises at least one first voltage signal line connected to the p first voltage branch signal lines in at least one of the M light emitting control units.

[0013] Optionally, the n columns of light emitting elements include n columns of micro light emitting diodes.

[0014] Optionally, the light emitting substrate comprises: a base substrate; a first metal layer and a second metal layer on the base substrate; and at least one insulating layer, wherein the at least one insulating layer separates the first metal layer from the second metal layer.

[0015] Optionally, the light-emitting substrate also includes a plurality of signal lines; wherein the plurality of signal lines include a plurality of signal lines extending along a first direction and a plurality of signal lines extending along a second direction, the second direction being different from the first direction; the plurality of signal lines extending along the first direction are part of one of the first metal layer and the second metal layer; and the plurality of signal lines extending along the second direction are part of the other of the first metal layer and the second metal layer.

[0016] Optionally, the light-emitting substrate further comprises a black matrix on the base substrate; wherein the orthographic projections of the first metal layer and the second metal layer on the base substrate are within the orthographic projections of the black matrix on the base substrate.

[0017] Optionally, the black matrix includes a plurality of first black matrix strips extending along the first direction and a plurality of second black matrix strips extending along the second direction; and an orthographic projection of a combination of the black matrix and the plurality of signal lines on the base substrate is a grid.

[0018] Optionally, a plurality of first black matrix strips are arranged along the second direction; the plurality of second black matrix strips are arranged along the first direction; any two adjacent first black matrix strips among the plurality of first black matrix strips are spaced apart by the same distance along the second direction; and any two adjacent second black matrix strips among the plurality of second black matrix strips are spaced apart by the same distance along the first direction.

[0019] Optionally, a line width of a corresponding one of the plurality of signal lines along the first direction is smaller than a line width of the black matrix bar along the first direction; and a line width of a corresponding one of the plurality of signal lines along the second direction is smaller than a line width of the black matrix bar along the second direction.

[0020] Optionally, the plurality of signal lines extending along the first direction include a second voltage signal line; and the plurality of signal lines extending along the second direction include a first voltage branch signal line and a second voltage branch signal line.

[0021] Optionally, the light-emitting substrate further comprises a first resin layer between the black matrix and the first metal layer; wherein the at least one insulating layer comprises a second resin layer.

[0022] Optionally, the light-emitting substrate further includes a first passivation layer between the first resin layer and the first metal layer; wherein the at least one insulating layer further includes a second passivation layer between the second resin layer and the first metal layer, and a third passivation layer between the second resin layer and the second metal layer.

[0023] Optionally, the light emitting substrate further comprises a fourth passivation layer located on a side of the second metal layer away from the base substrate; and at least two through holes penetrating the fourth passivation layer and partially exposing a surface of the second metal layer.

[0024] Optionally, each of the first metal layer and the second metal layer includes copper; and the second metal layer further includes nickel gold on the surface exposed by the at least two through-hole portions.

[0025] Optionally, each of the first metal layer and the second metal layer includes copper; and the second metal layer further includes indium tin oxide on the surface exposed by the at least two through-hole portions.

[0026] Optionally, the light-emitting substrate further includes at least one gas release through hole.

[0027] Optionally, the at least one gas release through hole includes a first gas release through hole penetrating the first passivation layer and the second passivation layer, and a second gas release through hole penetrating the third passivation layer and the fourth passivation layer.

[0028] Optionally, orthographic projections of the first gas release through hole and the second gas release through hole on the base substrate at least partially overlap with each other.

[0029] Optionally, the light emitting substrate includes a plurality of first gas release through holes arranged in a first array and a plurality of second gas release through holes arranged in a second array.

[0030] On the other hand, the present disclosure provides a display device, comprising a light-emitting substrate described herein or manufactured by the method described herein, a reflective display panel, and an integrated circuit connected to the reflective display panel; wherein the light-emitting substrate is located on the display side of the reflective display panel.

[0031] Optionally, the reflective display panel includes a plurality of first signal lines and a plurality of second signal lines; the light-emitting substrate includes a plurality of signal lines; the plurality of signal lines include a plurality of signal lines extending along a first direction and a plurality of signal lines extending along a second direction, the second direction being different from the first direction; the plurality of signal lines extending along the first direction cross the plurality of first signal lines at an angle greater than zero and less than 20 degrees, and / or the plurality of signal lines extending along the second direction cross the plurality of second signal lines at an angle greater than zero and less than 20 degrees; and the plurality of first signal lines are a plurality of data lines, and the plurality of second signal lines are a plurality of gate lines.

[0032] On the other hand, the present disclosure provides a method for driving a light-emitting substrate; wherein the light-emitting substrate includes a plurality of light-emitting control units arranged in M ​​rows and N columns, M is an integer greater than or equal to one, and N is an integer greater than or equal to one; wherein the method includes: connecting a corresponding group of M groups of second voltage signal lines to a corresponding one of the M light-emitting control units, the corresponding group of the M groups of second voltage signal lines including k second voltage signal lines, k being an integer greater than or equal to one; wherein the corresponding one of the plurality of light-emitting control units includes p sub-units, p being an integer greater than or equal to one; wherein the method also includes: connecting p first voltage branch signal lines to the p sub-units, respectively; electrically connecting k second voltage branch signal lines to the k second voltage signal lines in the corresponding groups of the M groups of second voltage signal lines, respectively; providing a second voltage signal to p groups of second voltage branch signal lines, the corresponding group of the p groups of second voltage branch signal lines including the k second voltage branch signal lines; electrically connecting the p first voltage branch signal lines; and providing a first voltage signal to the p first voltage branch signal lines.

[0033] Optionally, the corresponding one of the multiple light-emitting control units includes a plurality of light-emitting elements arranged in m rows and n columns, m is an integer greater than or equal to p, and n is an integer greater than or equal to one; and the Pth subunit among the p subunits includes n columns of light-emitting elements, 1≤P≤p; wherein the method further includes: commonly connecting the first ends of the n columns of light-emitting elements in the Pth subunit to the Pth first voltage branch signal line among the p first voltage branch signal lines; and connecting the corresponding second ends of the n columns of light-emitting elements in the Pth subunit to one of the k second voltage branch signal lines in the Pth group of the p groups of second voltage branch signal lines.

[0034] Optionally, the method also includes: applying the first voltage signal sequentially to the M light-emitting control units; and applying the second voltage signal sequentially to the k second voltage signal lines during a time period in which the first voltage signal is applied to the corresponding one of the M light-emitting control units.

[0035] Optionally, during the time period when the first voltage signal is applied to the corresponding one of the M light-emitting control units, the first voltage signal is simultaneously applied to the p first voltage branch signal lines; and during the time period when the second voltage signal is applied to the Kth second voltage branch signal line among the k second voltage signal lines, the second voltage signal is simultaneously applied to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines, 1≤K≤k.

[0036] Optionally, during the time period when the first voltage signal is applied to the corresponding one of the M light-emitting control units, the first voltage signal is simultaneously applied to the first ends of the p sub-units through the p first voltage branch signal lines respectively; and during the time period when the second voltage signal is applied to the Kth second voltage branch signal line among the k second voltage branch signal lines, the second voltage signal is simultaneously applied to the second end connected to the Kth second voltage branch signal line among the k second voltage branch signal lines, and the second ends connected to the Kth second voltage branch signal line come from the p sub-units respectively.

[0037] Optionally, the duration of the image frame includes TK represents the light-emitting duration of the light-emitting element of the Kth color in the M light-emitting control units; during the TK duration, the first voltage signal is sequentially applied to the M light-emitting control units, and the second voltage signal is sequentially applied to the Kth second voltage signal lines respectively from the M groups of second voltage signal lines; and the light-emitting elements of the Kth color in the M light-emitting control units are configured to emit red light one by one and sequentially during the T1 duration.

[0038] Optionally, at a first time point Tn, the Kth second voltage signal line in the first light-emitting control unit among two adjacent light-emitting control units is provided with the second voltage signal; at a second time point T(n+1), the Kth second voltage signal line in the second light-emitting control unit among the two adjacent light-emitting control units is provided with the second voltage signal; and T(n+1)=Tn+TK / M.

[0039] On the other hand, the present disclosure provides a method for driving a display device, comprising: assembling a reflective display panel with a light-emitting substrate, wherein the light-emitting substrate includes a plurality of light-emitting control units arranged in M ​​rows and N columns, M is an integer greater than or equal to one, and N is an integer greater than or equal to one; connecting M first voltage signal lines to the M light-emitting control units in corresponding columns of the N columns of light-emitting control units, respectively; and connecting corresponding groups of M groups of second voltage signal lines to corresponding ones of the M light-emitting control units, the corresponding groups of the M groups of second voltage signal lines include k second voltage signal lines, k is an integer greater than or equal to one; wherein the corresponding one of the plurality of light-emitting control units includes p sub-units, p is an integer greater than or equal to one; wherein the method also comprises driving the light-emitting substrate according to the method described herein.

[0040] Optionally, the method also includes applying gate scanning signals to g gate lines corresponding to the corresponding first voltage signal lines, respectively, to turn on sub-pixels corresponding to the light-emitting elements connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines; wherein, after applying gate scanning signals to the g gate lines corresponding to the corresponding first voltage signal lines, respectively, to turn on the sub-pixels corresponding to the light-emitting elements connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines, the first voltage signal is applied to the corresponding one of the M first voltage signal lines, and the second voltage signal is applied to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines.

[0041] Optionally, the starting time point of the light-emitting element connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines is later than the starting time point of applying the gate scanning signal to the first gate line among the g gate lines corresponding to the corresponding first voltage signal line (m×t0), wherein t0 is the duration of scanning a row of light-emitting elements in the reflective display panel.

[0042] Optionally, the method also includes applying gate scanning signals to the g gate lines corresponding to the corresponding first voltage signal lines, respectively, to turn on the sub-pixels corresponding to the light-emitting elements connected to the (K+1)th second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines; and upon completing the application of gate scanning signals to the g gate lines corresponding to the corresponding first voltage signal lines, respectively, to turn on the sub-pixels corresponding to the light-emitting elements connected to the (K+1)th second voltage branch signal line, applying the first voltage signal to the corresponding one of the M first voltage signal lines, and applying the second voltage signal to the (K+1)th second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines.

[0043] Optionally, the light-emitting element connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines is configured to emit light within a TK duration; and the sum of the light-emitting durations of the light-emitting elements connected to all p groups of second voltage branch signal lines is equal to the duration of an image frame in the reflective display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] According to various disclosed embodiments, the following drawings are examples only for illustration purposes and are not intended to limit the scope of the present invention.

[0045] Figure 1 is a schematic diagram showing the structure of a light-emitting substrate in some embodiments of the present disclosure.

[0046] Figure 2 is a schematic diagram showing the structure of a light emitting control unit in a light emitting substrate according to some embodiments of the present disclosure.

[0047] Figure 3 Schematic diagram showing the structure of a column of light emitting control units in a light emitting substrate according to some embodiments of the present disclosure.

[0048] Figure 4 is a schematic diagram showing the structure of a light emitting control unit in a light emitting substrate according to some embodiments of the present disclosure.

[0049] Figure 5 is a timing diagram for driving a light-emitting substrate according to some embodiments of the present disclosure.

[0050] Figure 6 1 is a timing diagram for driving a light-emitting substrate and scanning gate lines of a reflective display panel using the light-emitting substrate according to some embodiments of the present disclosure.

[0051] Figure 7is a schematic diagram showing the structure of a light emitting control unit in a light emitting substrate according to some embodiments of the present disclosure.

[0052] Figure 8 for Figure 7 A magnified view of the LED bonding point in Figure 1.

[0053] Fig. 9 is a schematic diagram showing the structure of a backplane for bonding a micro LED of a light-emitting substrate according to some embodiments of the present disclosure.

[0054] Fig.10 Schematic diagram showing the structure of a backplane for bonding a micro LED to a light-emitting substrate according to some embodiments of the present disclosure.

[0055] Fig.11A is a schematic diagram showing a signal line layer and a black matrix layer in a light-emitting substrate according to some embodiments of the present disclosure.

[0056] Fig. 11B is a schematic diagram showing a signal line layer and a black matrix layer in a light-emitting substrate according to some embodiments of the present disclosure.

[0057] Fig.12 yes Fig.11A Magnified view of the magnified area.

[0058] Fig.13 is along Fig.11A Cross-sectional view along line A-A'.

[0059] Fig.14 The arrangement of signal lines along the peripheral area of ​​the light emitting substrate in some embodiments according to the present disclosure is shown.

[0060] Fig.15 The arrangement of signal lines in the light emitting substrate according to some embodiments of the present disclosure is shown.

[0061] Fig.16 The arrangement of signal lines in the light emitting substrate according to some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0062] The present disclosure will now be described in more detail with reference to the following examples. It should be noted that the following description of some of the embodiments presented herein is for illustration and description purposes only. It is not intended to be exhaustive or limited to the precise form disclosed.

[0063] The present disclosure particularly provides a light-emitting substrate, a display device, and a method for driving a light-emitting substrate, which substantially eliminates one or more problems caused by the limitations and disadvantages of the prior art. In one aspect, the present disclosure provides a light-emitting substrate. In some embodiments, the light-emitting substrate includes: a plurality of light-emitting control units arranged in M ​​rows and N columns, M is an integer greater than or equal to one, and N is an integer greater than or equal to one. In some embodiments, the corresponding column in the N columns of light-emitting control units includes: M groups of second voltage signal lines. Optionally, the corresponding group in the M groups of second voltage signal lines is connected to a corresponding one of the M light-emitting control units. Optionally, the corresponding group in the M groups of second voltage signal lines includes k second voltage signal lines, k is an integer greater than or equal to one. Optionally, the corresponding one of the plurality of light-emitting control units includes: p subunits, p is an integer greater than or equal to one; p first voltage branch signal lines respectively connected to the p subunits; p groups of second voltage branch signal lines, and the corresponding group in the p groups of second voltage branch signal lines includes k second voltage branch signal lines. Optionally, the p first voltage branch signal lines are electrically connected. Optionally, the k second voltage branch signal lines are electrically connected to the k second voltage signal lines in the corresponding group of the M groups of second voltage signal lines, respectively.

[0064] Figure 1 Schematic diagram showing the structure of a light-emitting substrate in some embodiments of the present disclosure. Figure 1 In some embodiments, the light-emitting substrate includes a plurality of light-emitting control units CU(i, j) arranged in M ​​rows and N columns, M is an integer greater than or equal to one, N is an integer greater than or equal to one, 1≤i≤N, 1≤j≤N. As used herein, a row of light-emitting control units is along a row direction, and a column of light-emitting control units is along a column direction, and the row direction and the column direction are two non-parallel directions, for example, the row direction and the column direction intersect each other. Optionally, the row direction and the column direction are perpendicular to each other. Optionally, the row direction and the column direction intersect each other at an inclination angle other than 90 degrees.

[0065] Figure 2 Schematic diagram showing the structure of a light emitting control unit in a light emitting substrate according to some embodiments of the present disclosure. Figure 2 , depicts a corresponding one of the plurality of light emitting control units CU(i, j). In some embodiments, the corresponding one of the plurality of light emitting control units CU(i, j) includes a plurality of light emitting elements arranged in m rows and n columns, m being an integer greater than or equal to one, and n being an integer greater than or equal to one. Figure 2As shown, in one example, the plurality of light-emitting elements include light-emitting elements of different colors, for example, a corresponding light-emitting element sp1 of a first color, a corresponding light-emitting element sp2 of a second color, and a corresponding light-emitting element sp3 of a third color. In another example, the light-emitting elements in the corresponding columns of a corresponding one of the plurality of light-emitting control units CU (i, j) have the same color. For example, the light-emitting elements in column c1 are all light-emitting elements of the first color, the light-emitting elements in column ci are all light-emitting elements of the second color, and the light-emitting elements in column cn are all light-emitting elements of the third color. In another example, the corresponding rows of the corresponding one of the plurality of light-emitting control units CU (i, j) include light-emitting elements arranged in a repeated color pattern. For example, the light-emitting elements in row rj include a repeated pattern of a corresponding light-emitting element sp1 of a first color, a corresponding light-emitting element sp2 of a second color, and a corresponding light-emitting element sp3 of a third color. As used herein, the term "color pattern" refers to a pattern of (one or more) colors of light emitted when a light-emitting element emits light.

[0066] Optionally, the light emitting element is a micro light emitting diode.

[0067] In some embodiments, the corresponding column Ci of the N columns of light emitting control units includes at least one first voltage signal line (e.g., a single first voltage signal line), and the at least one first voltage signal line is connected to p first voltage branch signal lines in at least one of the M light emitting control units. Optionally, all first voltage branch signal lines in all the M light emitting control units are connected to at least one first voltage signal line.

[0068] Figure 3 Schematic diagram showing the structure of a column of light emitting control units in a light emitting substrate according to some embodiments of the present disclosure. Figure 3 In some embodiments, a corresponding column Ci in the N columns of light emitting control units includes M first voltage signal lines, which are respectively connected to the M light emitting control units; and M groups of second voltage signal lines. Figure 3 As shown, M first voltage signal lines include P1, ..., Pj, ..., PM. M light emitting control units include CU(i, 1), ..., CU(i, j), ..., CU(i, M). M first voltage signal lines P1, ..., Pj, ..., PM are respectively connected to M light emitting control units CU(i, 1), ..., CU(i, j), ..., CU(i, M). M groups of second voltage signal lines include G1, Gj, ..., GM.

[0069] In some embodiments, the light-emitting substrate includes M×N first voltage signal lines, which correspond to M×N light-emitting control units in a one-to-one relationship, for example. A corresponding one of the M×N first voltage signal lines is connected to a first voltage branch signal line in a corresponding one of the M×N light-emitting control units.

[0070] In some embodiments, a corresponding group of the M groups of second voltage signal lines is connected to a corresponding one of the M light emitting control units. Figure 3 , the corresponding group G1 among the M groups of second voltage signal lines G1, Gj, ..., GM is connected to a corresponding one CU(i, 1) among the M light-emitting control units CU(i, 1), ..., CU(i, j), ..., CU(i, M). The corresponding group Gj among the M groups of second voltage signal lines G1, Gj, ..., GM is connected to a corresponding one CU(i, j) among the M light-emitting control units CU(i, 1), ..., CU(i, j), ..., CU(i, M). The corresponding group GM among the M groups of second voltage signal lines G1, Gj, ..., GM is connected to a corresponding one CU(i, M) among the M light-emitting control units CU(i, 1), ..., CU(i, j), ..., CU(i, M).

[0071] In some embodiments, a corresponding group of the M groups of second voltage signal lines includes k second voltage signal lines, where k is an integer greater than or equal to one. Figure 3 , the corresponding group G1 among the M groups of second voltage signal lines G1, Gj, ..., GM includes k second voltage signal lines N1-1, N2-1, ..., Nk-1. The corresponding group Gj among the M groups of second voltage signal lines G1, Gj, ..., GM includes k second voltage signal lines N1-j, N2-j, ..., Nk-j. The corresponding group GM among the M groups of second voltage signal lines G1, Gj, ..., GM includes k second voltage signal lines N1-M, N2-M, ..., Nk-M. Optionally, a corresponding one of the multiple light-emitting control units CU (i, j) includes k light-emitting elements of different colors, such as sp1, sp2, ..., spk. In some embodiments, a corresponding one of the multiple light-emitting control units CU (i, j) includes light-emitting elements of three different colors, such as a red light-emitting element, a green light-emitting element and a blue light-emitting element, and k=3.

[0072] Figure 4 Schematic diagram showing the structure of a light emitting control unit in a light emitting substrate according to some embodiments of the present disclosure. Figure 4 In some embodiments, a corresponding one of the plurality of light emitting control units includes p subunits, where p is an integer greater than or equal to one. Figure 4As shown, the p sub-units include SU1, ..., SU(P), ...SUp. A corresponding one of the plurality of light emitting control units also includes p first voltage branch signal lines, which are respectively connected to the p sub-units. Figure 4 As shown, p first voltage branch signal lines include Pb1, ..., Pbp. The p first voltage branch signal lines Pb1, ..., Pbp are connected to p subunits SU1, ..., SU(P), ..., SUP, respectively. In addition, a corresponding one of the plurality of light emitting control units further includes p groups of second voltage branch signal lines. For example, Figure 4 As shown, the p groups of second voltage branch signal lines include Gb1, . . . , Gbp.

[0073] In some embodiments, the p first voltage branch signal lines are electrically connected to each other and are electrically connected to a corresponding one of the M first voltage signal lines. Figure 4 , p first voltage branch signal lines Pb1, ..., Pbp are electrically connected. The p first voltage branch signal lines Pb1, ..., Pbp are electrically connected in common to a corresponding one Pj of the M first voltage signal lines.

[0074] In some embodiments, the corresponding group in the p group of second voltage branch signal lines includes k second voltage branch signal lines. For example, the corresponding group Gb1 in the p group of second voltage branch signal lines includes k second voltage branch signal lines Nb1-1, Nb1-2, ..., Nb1-k in the corresponding group Gb1. The corresponding group Gb(P) in the p group of second voltage branch signal lines includes k second voltage branch signal lines Nb(P)-1, Nb(P)-2, ..., Nb(P)-k in the corresponding group Gb(P), 1≤P≤p. The corresponding group Gbp in the p group of second voltage branch signal lines includes k second voltage branch signal lines Nbp-1, Nbp-2, ..., Nbp-k in the corresponding group Gbp.

[0075] In some embodiments, the k second voltage branch signal lines are electrically connected to the k second voltage signal lines in the corresponding groups of the M groups of second voltage signal lines. Figure 4, the k second voltage branch signal lines Nb1-1, Nb1-2, ..., Nb1-k in the corresponding group Gb1 are respectively electrically connected to the k second voltage signal lines N1-j, N2-j, ..., Nk-j in the corresponding group Gj in the M groups of second voltage signal lines. Similarly, the k second voltage branch signal lines Nb(P)-1, Nb(P)-2, ..., Nb(P)-k in the corresponding group Gb(P) are respectively electrically connected to the k second voltage signal lines N1-j, N2-j, ..., Nk-j in the corresponding group Gj in the M groups of second voltage signal lines. Similarly, the k second voltage branch signal lines Nbp-1, Nbp-2, ..., Nbp-k in the corresponding group Gbp are respectively electrically connected to the k second voltage signal lines N1-j, N2-j, ..., Nk-j in the corresponding group Gj in the M groups of second voltage signal lines.

[0076] In the present light-emitting substrate, light-emitting elements of the same color are connected in series and then connected in parallel. The total current of the light-emitting substrate can be reduced. When the number of light-emitting elements in each light-emitting control unit is determined, the larger the number of light-emitting elements connected in series, the smaller the total current in the light-emitting control unit. When the line width and thickness of the metal wire are determined, the smaller the current density, the smaller the power consumption required. However, when the number of light-emitting elements connected in series increases, due to the fact that the current of each light-emitting element is small, the total current of the light-emitting control unit is relatively small. This may make it difficult to drive the light-emitting circuit, resulting in poor electrical drivability of the light-emitting substrate. Compared with a light-emitting substrate in which all light-emitting elements of the same color are connected in series, the present light-emitting substrate adopts a combination of series connection and parallel connection, which ensures that the light-emitting elements can be driven while reducing power consumption.

[0077] In the present light-emitting substrate, light-emitting elements of different colors are electrically connected to different second voltage signal lines. Light-emitting elements of different colors (e.g., red, blue, green light-emitting elements) have different IV characteristics. In order to achieve different brightness of light-emitting elements of different colors, the voltages used to drive light-emitting elements of different colors are set to be different. In addition, by independently driving light-emitting elements of different colors, the present light-emitting substrate can achieve field sequential color display.

[0078] In some embodiments, the Pth subunit among the p subunits includes n columns of light emitting elements, 1≤P≤p. Optionally, each column among the n columns of light emitting elements includes multiple rows of light emitting elements electrically connected in series. Figure 4, the P-th subunit SU(P) among the p subunits includes n columns of light-emitting elements (e.g., c1, ..., ci, ..., cn), and each column of the n columns of light-emitting elements includes multiple rows of light-emitting elements connected in series (e.g., rj and r(j+1)). Similarly, the first subunit SU1 among the p subunits includes n columns of light-emitting elements (e.g., c1, ..., ci, ..., cn), and each column of the n columns of light-emitting elements includes multiple rows of light-emitting elements connected in series (e.g., r1 and r2). Similarly, the last subunit SUP among the p subunits includes n columns of light-emitting elements (e.g., c1, ..., ci, ..., cn), and each column of the n columns of light-emitting elements includes multiple rows of light-emitting elements connected in series (e.g., r(m-1) and rm).

[0079] When the first voltage signal is applied to a corresponding one Pj of the M first voltage signal lines, the first voltage signal is applied to the p first voltage branch signal lines Pb1, ..., Pbp. When the second voltage signal is applied to the second voltage signal line N1-j, the second voltage signal is applied to the second voltage branch signal lines Nb1-1, ... in the corresponding group Gb1, the second voltage branch signal lines Nb(P)-1, ... in the corresponding group Gb(P), and the second voltage branch signal line Nbp-1 in the corresponding group Gbp. When the second voltage signal is applied to the second voltage signal line N2-j, the second voltage signal is applied to the second voltage branch signal lines Nb1-2, ... in the corresponding group Gb1, the second voltage branch signal lines Nb(P)-2, ... in the corresponding group Gb(P), and the second voltage branch signal line Nbp-2 in the corresponding group Gbp. When the second voltage signal is applied to the second voltage signal line Nk-j, the second voltage signal is applied to the second voltage branch signal line Nb1-k in the corresponding group Gb1,..., the second voltage branch signal line Nb(P)-k in the corresponding group Gb(P),... and the second voltage branch signal line Nbp-k in the corresponding group Gbp.

[0080] In some embodiments, a corresponding column of n columns of light emitting elements in a corresponding subunit of the p subunits includes a first end and a second end, which are respectively located at two ends of a structure including a plurality of rows of light emitting elements electrically connected in series. Figure 4, the n columns of light emitting elements in the P-th subunit SU(P) include a first terminal T1 and a second terminal T2. The corresponding columns in the columns of light emitting elements in the P-th subunit SU(P) include corresponding first terminals and corresponding second terminals, which are respectively located at two ends of a structure including rows rj and r(j+1) electrically connected in series. The first terminals T1 of the n columns of light emitting elements in the P-th subunit SU(P) are commonly connected to the P-th first voltage branch signal line Pb(P) among the p first voltage branch signal lines. Similarly, the first terminals T1 of the n columns of light emitting elements in the first subunit SU1 are commonly connected to the 1st first voltage branch signal line Pb1 among the p first voltage branch signal lines. Similarly, the first terminals T1 of the n columns of light emitting elements in the last subunit SUP are commonly connected to the p-th first voltage branch signal line Pb(P) among the p first voltage branch signal lines.

[0081] Optionally, the corresponding first end in the first terminal T1 is the anode of a row (for example, the first row) of multiple rows of light-emitting elements electrically connected in series in the corresponding column of n columns of light-emitting elements in the P-th sub-unit SU(P), or is connected to the anode; the corresponding second end in the second terminal T2 is the cathode of another row (for example, the last row) of multiple rows of light-emitting elements electrically connected in series in the corresponding column of n columns of light-emitting elements in the P-th sub-unit SU(P), or is connected to the cathode.

[0082] Optionally, the corresponding first end in the first terminal T1 is the cathode of the first light-emitting element in the multiple rows of light-emitting elements electrically connected in series in the corresponding column in the n columns of light-emitting elements in the P-th sub-unit SU(P), or is connected to the cathode; the corresponding second end in the second terminal T2 is the anode of the last light-emitting element in the multiple rows of light-emitting elements electrically connected in series in the corresponding column in the n columns of light-emitting elements in the P-th sub-unit SU(P), or is connected to the anode.

[0083] As described above, when the first voltage signal is applied to a corresponding one Pj of the M first voltage signal lines, the first voltage signal is applied to the p first voltage branch signal lines Pb1, ..., Pbp. In addition, when the first voltage signal is applied to a corresponding one Pj of the M first voltage signal lines, the first voltage signal is applied to the first terminal T1 of each of the p subunits including SU1, ..., SU(P), ..., SUP.

[0084] In some embodiments, the corresponding second ends of the second ends T2 of the n columns of light emitting elements in the Pth subunit SU(P) are connected to one of the k second voltage branch signal lines in the Pth group of the p groups of second voltage branch signal lines. Figure 4, in the Pth subunit SU(P), 1≤P≤p, the first corresponding second end T2-1 of the second ends T2 of the n columns of light emitting elements in the Pth subunit SU(P) is connected to the second voltage branch signal line Nb(P)-1, the second corresponding second end T2-2 of the second ends T2 of the n columns of light emitting elements in the Pth subunit SU(P) is connected to the second voltage branch signal line Nb(P)-2, and the kth corresponding second end T2-k of the second ends T2 of the n columns of light emitting elements in the Pth subunit SU(P) is connected to the second voltage branch signal line Nb(P)–k. In an example, a corresponding one of the plurality of light emitting control units CU(i, j) includes light emitting elements of three different colors, such as a red light emitting element, a green light emitting element, and a blue light emitting element, and k=3.

[0085] As described above, when the second voltage signal is applied to the second voltage signal line N1-j, the second voltage signal is applied to the second voltage branch signal line Nb(P)-1 in the corresponding group Gb(P), 1≤P≤p. In addition, when the second voltage signal is applied to the second voltage signal line N1-j, the second voltage signal is applied to the first corresponding second end T2-1 of the second ends T2 of the n columns of light emitting elements in the P-th subunit SU(P).

[0086] As described above, when the second voltage signal is applied to the second voltage signal line N2-j, the second voltage signal is applied to the second voltage branch signal line Nb(P)-2 in the corresponding group Gb(P), 1≤P≤p. In addition, when the second voltage signal is applied to the second voltage signal line N2-j, the second voltage signal is applied to the second corresponding second end T2-2 in the second end T2 of the n-column light-emitting element in the P-th subunit SU(P).

[0087] As described above, when the second voltage signal is applied to the second voltage signal line Nk-j, the second voltage signal is applied to the second voltage branch signal line Nb(P)-k in the corresponding group Gb(P), 1≤P≤p. In addition, when the second voltage signal is applied to the second voltage signal line Nk-j, the second voltage signal is applied to the kth corresponding second end T2-k of the second ends T2 of the n columns of light emitting elements in the Pth subunit SU(P).

[0088] In some embodiments, each of the n columns of light emitting elements includes the same number of rows of light emitting elements electrically connected in series. In one example, each of the n columns of light emitting elements includes (m / p) rows of light emitting elements electrically connected in series.

[0089] In some embodiments, multiple rows of light emitting elements in a corresponding column of n columns of light emitting elements include light emitting elements of the same color. Figure 4, multiple rows of light-emitting elements in column C1 of n columns of light-emitting elements include light-emitting elements of a first color (for example, red); multiple rows of light-emitting elements in column C2 of n columns of light-emitting elements include light-emitting elements of a second color (for example, green); and multiple rows of light-emitting elements in column C3 of n columns of light-emitting elements include light-emitting elements of a third color (for example, blue).

[0090] Furthermore, in some embodiments, all rows of light-emitting elements in the same column of light-emitting elements from the plurality of light-emitting control units include light-emitting elements of the same color. For example, all rows of light-emitting elements in the first column of light-emitting elements from the plurality of light-emitting control units include light-emitting elements of a first color; all rows of light-emitting elements in the second column of light-emitting elements from the plurality of light-emitting control units include light-emitting elements of a second color; and all rows of light-emitting elements in the third column of light-emitting elements from the plurality of light-emitting control units include light-emitting elements of a third color.

[0091] In some embodiments, a corresponding column of n columns of light-emitting elements includes light-emitting elements of the Kth color among k different colors, 1≤K≤k. Optionally, the light-emitting elements in (n / k) columns of the n columns of light-emitting elements are of the Kth color. In one example, k=3; the light-emitting elements in (n / 3) columns of the n columns of light-emitting elements are of a first color (e.g., red); the light-emitting elements in (n / 3) columns of the n columns of light-emitting elements are of a second color (e.g., green); and the light-emitting elements in (n / 3) columns of the n columns of light-emitting elements are of a third color (e.g., blue).

[0092] In some embodiments, the second ends of (n / k) columns of n columns of light emitting elements are commonly connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in the Pth group of p groups of second voltage branch signal lines. In one example, k=3; in the subunit SU(P), the second ends of (n / 3) columns of n columns of light emitting elements are commonly connected to the first second voltage branch signal line Nb(P)-1 among the k second voltage branch signal lines in the Pth group Gb(P) among the p groups of second voltage branch signal lines; the second ends of (n / 3) columns of n columns of light emitting elements are commonly connected to the second second voltage branch signal line Nb(P)-2 among the k second voltage branch signal lines in the Pth group Gb(P) among the p groups of second voltage branch signal lines; and the second ends of (n / 3) columns of n columns of light emitting elements are commonly connected to the kth second voltage branch signal line Nb(P)-k among the k second voltage branch signal lines in the Pth group Gb(P) among the p groups of second voltage branch signal lines (where k=3). Specifically, the first corresponding second terminal T2-1 is commonly connected to the 1st second voltage branch signal line Nb(P)-1; the second corresponding second terminal T2-2 is commonly connected to the 2nd second voltage branch signal line Nb(P)-2; and the kth corresponding second terminal T2-k (where k=3) is commonly connected to the kth second voltage branch signal line Nb(P)-k.

[0093] In some embodiments, reference Figure 4 , m is (x*p), n is (y*k), wherein x is an integer greater than one, and y is an integer greater than one. Figure 4 In, for example, x=2, each of the p subunits includes two rows of light-emitting elements. Figure 4 , y ≥ 3.

[0094] In some embodiments, reference Figure 4 , the n columns of light emitting elements in the Pth subunit include y groups of columns, for example CG1, ..., CGy. Optionally, the Yth group in the y groups of columns includes k columns of light emitting elements each having k different colors. In one example, k=3, the Yth group in the y groups of columns includes three columns of light emitting elements each having three different colors, 1≤Y≤y. In another example, the Yth group has a red, green, and blue color pattern. Optionally, the color patterns in the y groups of columns are the same, for example, each of the y groups of columns has the same red, green, and blue color pattern.

[0095] In another aspect, the present disclosure provides a display device. In some embodiments, the display device includes a light-emitting substrate described herein or manufactured by a method described herein, a display panel, and an integrated circuit connected to the display panel. Optionally, the display panel is a reflective display panel.

[0096] The light-emitting substrate can realize a direct front light source for a reflective display panel. In the display device, the light-emitting substrate is arranged in front of the reflective display panel (on the display side of the display panel) to realize image display.

[0097] In some embodiments, the reflective display panel includes a plurality of first signal lines and a plurality of second signal lines. The light-emitting substrate includes a plurality of signal lines. Optionally, the plurality of signal lines include a plurality of signal lines extending along a first direction and a plurality of signal lines extending along a second direction, and the second direction is different from the first direction. Optionally, the plurality of signal lines extending along the first direction cross the plurality of first signal lines at an angle greater than zero and less than 20 degrees, and / or the plurality of signal lines extending along the second direction cross the plurality of second signal lines at an angle greater than zero and less than 20 degrees. Optionally, the plurality of first signal lines are a plurality of data lines, and the plurality of second signal lines are a plurality of gate lines. Optionally, the plurality of first signal lines are a plurality of gate lines, and the plurality of second signal lines are a plurality of data lines.

[0098] On the other hand, the present disclosure provides a method for driving a light-emitting substrate. In some embodiments, the light-emitting substrate includes a plurality of light-emitting control units arranged in M ​​rows and N columns, M is an integer greater than or equal to one, and N is an integer greater than or equal to one. In some embodiments, the method includes: connecting M first voltage signal lines to the M light-emitting control units in corresponding columns of the N columns of light-emitting control units, respectively; and connecting corresponding groups of M groups of second voltage signal lines to corresponding ones of the M light-emitting control units, the corresponding groups of the M groups of second voltage signal lines including k second voltage signal lines, k being an integer greater than or equal to one. Optionally, a corresponding one of the plurality of light-emitting control units includes p sub-units, and p is an integer greater than or equal to one. Optionally, the method also includes connecting p first voltage branch signal lines to the p sub-units, respectively; electrically connecting k second voltage branch signal lines to k second voltage signal lines in corresponding groups of M groups of second voltage signal lines, respectively; providing a second voltage signal to p groups of second voltage branch signal lines, the corresponding group of the p groups of second voltage branch signal lines includes the k second voltage branch signal lines; electrically connecting the p first voltage branch signal lines to a corresponding one of the M first voltage signal lines; and providing a first voltage signal to a corresponding one of the M first voltage signal lines.

[0099] In some embodiments, the light emitting element is, for example, a mini light emitting diode or a micro light emitting diode. The present method enables field sequential color display to achieve a light source with high color gamut and highly uniform illumination. In some embodiments, the method further includes applying the first voltage signal to the M first voltage signal lines in sequence. In some embodiments, the method further includes applying the second voltage signal to the k second voltage signal lines in sequence. Optionally, the method includes applying the first voltage signal to the M first voltage signal lines in sequence; and applying the second voltage signal to the k second voltage signal lines in sequence.

[0100] In some embodiments, a corresponding one of the plurality of light-emitting control units includes a plurality of light-emitting elements arranged in m rows and n columns, m being an integer greater than or equal to p, and n being an integer greater than or equal to one. Optionally, the Pth subunit among the p subunits includes n columns of light-emitting elements, 1≤P≤p; each column of the n columns of light-emitting elements includes a plurality of rows of light-emitting elements electrically connected in series. In some embodiments, the method further includes: connecting the first ends of the n columns of light-emitting elements in the Pth subunit in common to the Pth first voltage branch signal line among the p first voltage branch signal lines; and connecting the corresponding second ends of the n columns of light-emitting elements in the Pth subunit to one of the k second voltage branch signal lines in the Pth group of the p groups of second voltage branch signal lines.

[0101] In some embodiments, the method further includes applying the first voltage signal to the M first voltage signal lines in sequence; and during a time period in which the first voltage signal is applied to a corresponding one of the M first voltage signal lines, applying the second voltage signal to k second voltage signal lines in sequence in a corresponding one of a plurality of light-emitting control units. Optionally, during a time period in which the first voltage signal is applied to a corresponding one of the M first voltage signal lines, the first voltage signal is simultaneously applied to the p first voltage branch signal lines; and during a time period in which the second voltage signal is applied to the Kth second voltage signal line among the k second voltage signal lines, the second voltage signal is simultaneously applied to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines, 1≤K≤k. Optionally, during a time period when the first voltage signal is applied to a corresponding one of the M first voltage signal lines, the first voltage signal is simultaneously applied to the first ends of the p sub-units through the p first voltage branch signal lines respectively; during a time period when the second voltage signal is applied to the Kth second voltage signal line among the k second voltage branch signal lines, the second voltage signal is simultaneously applied to the second end connected to the Kth second voltage branch signal line among the k second voltage branch signal lines, and the second ends connected to the Kth second voltage branch signal line come from the p sub-units respectively.

[0102] In some embodiments, the plurality of rows of light-emitting elements in a corresponding column among n columns of light-emitting elements include light-emitting elements of the same color; the corresponding column among n columns of light-emitting elements includes light-emitting elements of the Kth color among k different colors, 1≤K≤k; and the light-emitting elements in (n / k) columns among the n columns of light-emitting elements have the Kth color. In some embodiments, the method further includes commonly connecting the second ends of the (n / k) columns among n columns of light-emitting elements to the Kth second voltage branch signal line among the k second voltage branch signal lines in the Pth group among the p groups of second voltage branch signal lines, 1≤K≤k. Optionally, the method further includes sequentially applying the second voltage signal to k groups of columns of light-emitting elements, each group of the k groups of columns of light-emitting elements including (n / k) columns of n columns of light-emitting elements, and the light-emitting elements in the same group of the k groups of columns of light-emitting elements have the same color.

[0103] In some embodiments, m is (x*p), n is (y*k), wherein x is an integer greater than one, and y is an integer greater than one; the n columns of light-emitting elements in the Pth subunit include y groups of columns; the Yth group in the y groups of columns includes k columns of light-emitting elements each having k different colors, 1≤Y≤y; and the color patterns in the y groups of columns are the same. For example, each group in the y groups includes three columns of light-emitting elements each having three different colors. In one example, each group in the y groups includes three columns of light-emitting elements each having red, green, and blue, and each group in the y groups has the same red, green, and blue color pattern. In some embodiments, the method further includes sequentially applying a second voltage signal to the k columns of light-emitting elements each having k different colors in the Yth group.

[0104] Optionally, each of the n columns of light emitting elements comprises (m / p) rows of light emitting elements electrically connected in series.

[0105] Optionally, k=3.

[0106] Figure 5 is a timing diagram of driving a light-emitting substrate in some embodiments of the present disclosure. Figure 3 and Figure 5 In some embodiments, the method includes sequentially applying a first voltage signal to M first voltage signal lines (P1 to PM); sequentially applying a second voltage signal to k second voltage signal lines (in k second voltage signal lines) during a time period in which the first voltage signal is applied to a corresponding one of the M first voltage signal lines; Figure 6 , k=3, representing a red light emitting element, a green light emitting element, and a blue light emitting element). Figure 4 and Figure 5 During a time period in which the first voltage signal is applied to a corresponding one of the M first voltage signal lines, the first voltage signal is simultaneously applied to the p first voltage branch signal lines. During a time period in which the second voltage signal is applied to the Kth second voltage signal line among the k second voltage signal lines, the second voltage signal is simultaneously applied to the Kth second voltage branch signal line among the k second voltage branch signal lines in all the p groups of second voltage branch signal lines, 1≤K≤k.

[0107] exist Figure 5In the embodiment, T1, T2, and T3 respectively represent the light-emitting durations of k light-emitting elements of different colors in the M light-emitting control units. In one example, T1 represents the light-emitting duration of the red light-emitting element, T2 represents the light-emitting duration of the green light-emitting element, and T3 represents the light-emitting duration of the blue light-emitting element. In another example, the sum of T1, T2, and T3 is equal to the duration of the image frame of the reflective display panel using the light-emitting substrate as the front light source. In some embodiments, during the T1 duration, the first voltage signal is sequentially applied to the M light-emitting control units, and the second voltage signal is sequentially applied to the first second voltage signal line from the M groups of second voltage signal lines. The red light-emitting elements in the M light-emitting control units are configured to emit red light one by one and sequentially during the T1 duration. In some embodiments, during the T2 duration, the first voltage signal is sequentially applied to the M light-emitting control units, and the second voltage signal is sequentially applied to the second second voltage signal line from the M groups of second voltage signal lines. The green light-emitting elements in the M light-emitting control units are configured to emit green light one by one and sequentially during the T2 duration. In some embodiments, during the T3 duration, the first voltage signal is sequentially applied to the M light emitting control units, and the second voltage signal is sequentially applied to the third second voltage signal line from the M groups of second voltage signal lines. The blue light emitting elements in the M light emitting control units are configured to emit blue light one by one and sequentially during the T3 duration.

[0108] Optionally, the first second voltage signal line in the first light-emitting control unit of two adjacent light-emitting control units is provided with a second voltage signal at a first time point Tn, and the first second voltage signal line in the second light-emitting control unit of two adjacent light-emitting control units is provided with a second voltage signal at a second time point T(n+1). Optionally, the second second voltage signal line in the first light-emitting control unit of two adjacent light-emitting control units is provided with a second voltage signal at a first time point Tn, and the second second voltage signal line in the second light-emitting control unit of two adjacent light-emitting control units is provided with a second voltage signal at a second time point T(n+1). Optionally, the third second voltage signal line in the first light-emitting control unit of two adjacent light-emitting control units is provided with a second voltage signal at a first time point Tn, and the third second voltage signal line in the second light-emitting control unit of two adjacent light-emitting control units is provided with a second voltage signal at a second time point T(n+1).

[0109] Optionally, T(n+1)=Tn+D / M, where D is the total light duration of light emitting elements of the same color. In one example, for a red light emitting element, T(n+1)=Tn+T1 / M. In another example, for a green light emitting element, T(n+1)=Tn+T2 / M. In another example, for a blue light emitting element, T(n+1)=Tn+T3 / M. Optionally, T1=T2=T3, and (T1+T2+T3)=F. Optionally, (T1+T2+T3)=F, however, at least two of T1, T2 or T3 are different from each other.

[0110] In some embodiments, T1, ..., TK, ..., Tk represent the light-emitting duration of k light-emitting elements of different colors in M ​​light-emitting control units, respectively. In one example, the sum of T1 to Tk is equal to the duration of an image frame of a reflective display panel using a light-emitting substrate as a front light source. In some embodiments, during the TK duration, a first voltage signal is sequentially applied to the M light-emitting control units, and a second voltage signal is sequentially applied to the Kth second voltage signal line from the M groups of second voltage signal lines, respectively. The light-emitting elements of the Kth color in the M light-emitting control units are configured to emit red light one by one and sequentially during the T1 duration.

[0111] Optionally, the Kth second voltage signal line in the first light-emitting control unit of two adjacent light-emitting control units is provided with a second voltage signal at a first time point Tn, and the Kth second voltage signal line in the second light-emitting control unit of two adjacent light-emitting control units is provided with a second voltage signal at a second time point T(n+1). Optionally, T(n+1)=Tn+TK / M.

[0112] In some embodiments, the reflective display panel includes a plurality of image display areas arranged in M ​​rows and N columns, and the plurality of image display areas respectively correspond to a plurality of light emitting control units in the light emitting substrate. One or more sub-pixels in a corresponding one of the plurality of image display areas correspond to a light emitting element in a corresponding one of the plurality of light emitting control units.

[0113] Figure 6 FIG. 1 is a timing diagram of driving a light-emitting substrate and scanning a gate line of a reflective display panel using the light-emitting substrate according to some embodiments of the present disclosure. Figure 6, M light emitting control units CU(i, 1), ..., CU(i, M) are depicted. The gate scanning signals are respectively provided to the g gate lines Gl-1-r1 to Gl-1-rg corresponding to the first light emitting control unit CU(i, 1). The gate scanning signals are respectively provided to the g gate lines Gl-M-r1 to Gl-M-rg corresponding to the Mth light emitting control unit CU(i, M). T1, T2, and T3 respectively represent the light emitting durations of light emitting elements of different colors.

[0114] In some embodiments, a method for driving a front-light reflective display device includes assembling a reflective display panel and a front-light emitting substrate together, wherein the emitting substrate includes a plurality of light-emitting control units arranged in M ​​rows and N columns, M is an integer greater than or equal to one, and N is an integer greater than or equal to one; connecting M first voltage signal lines to the M light-emitting control units in corresponding columns of the N columns of light-emitting control units, respectively; and connecting corresponding groups of M groups of second voltage signal lines to corresponding ones of the M light-emitting control units, wherein the corresponding groups of the M groups of second voltage signal lines include k second voltage signal lines, k is an integer greater than or equal to one, wherein the corresponding one of the plurality of light-emitting control units includes p sub-units, and p is an integer greater than or equal to one; connecting p first voltage branch signal lines to the p sub-units, respectively; electrically connecting k second voltage branch signal lines to k second voltage signal lines in corresponding groups of the M groups of second voltage signal lines, respectively; and providing a second voltage signal to the p groups of second Voltage branch signal lines, the corresponding group in the p groups of second voltage branch signal lines includes the k second voltage branch signal lines; the p first voltage branch signal lines are electrically connected to the corresponding one of the M first voltage signal lines; the first voltage signal is applied to the M first voltage signal lines in sequence; during the time period when the first voltage signal is applied to the corresponding one of the M first voltage signal lines, the second voltage signal is applied to the k second voltage signal lines in a timing manner; during the time period when the first voltage signal is applied to the corresponding one of the M first voltage signal lines, the first voltage signal is simultaneously applied to the p first voltage branch signal lines; during the time period when the second voltage signal is applied to the Kth second voltage signal line among the k second voltage signal lines, the second voltage signal is simultaneously applied to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines, 1≤K≤k.

[0115] In some embodiments, the method further comprises applying a gate scanning signal to g gate lines corresponding to the corresponding first voltage signal lines respectively to turn on the sub-pixels corresponding to the light-emitting elements connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines. Figure 6As shown, after the gate scanning signals are applied to the g gate lines corresponding to the corresponding first voltage signal lines, the first voltage signal is applied to the corresponding one of the M first voltage signal lines, and the second voltage signal is applied to the Kth second voltage branch signal line among the k second voltage branch signal lines in all the p groups of second voltage branch signal lines; wherein the gate scanning signal is applied to turn on the sub-pixel corresponding to the light-emitting element connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in all the p groups of second voltage branch signal lines. Optionally, as Figure 6 As shown, the method also includes applying gate scanning signals to g gate lines corresponding to the corresponding first voltage signal lines respectively to turn on the sub-pixels corresponding to the light-emitting elements connected to the (K+1)th second voltage branch signal line among the k second voltage branch signal lines in all the p groups of second voltage branch signal lines; and when the gate scanning signals are applied to the g gate lines respectively to turn on the sub-pixels corresponding to the light-emitting elements connected to the (K+1)th second voltage branch signal line, applying the first voltage signal to a corresponding one of the M first voltage signal lines, and applying the second voltage signal to the (K+1)th second voltage branch signal line among the k second voltage branch signal lines in all the p groups of second voltage branch signal lines.

[0116] In one example, once the gate scan signal is provided to the g gate lines corresponding to the corresponding first voltage signal line to turn on the sub-pixel corresponding to the light-emitting element connected to the Kth second voltage branch signal line of the k second voltage branch signal lines among all the p groups of second voltage branch signal lines, the light-emitting element of the first color (e.g., the red light-emitting element) in the light-emitting substrate controlled by the corresponding first voltage signal line is configured to emit light (e.g., red light) within the light-emitting duration (e.g., T1 of the red light-emitting element). Once the gate scan signal is provided to the g gate lines corresponding to the corresponding first voltage signal line to turn on the sub-pixel corresponding to the light-emitting element connected to the (K+1)th second voltage branch signal line of the k second voltage branch signal lines among all the p groups of second voltage branch signal lines, the light-emitting element of the second color (e.g., the green light-emitting element) in the light-emitting substrate controlled by the corresponding first voltage signal line is configured to emit light (e.g., green light) within the light-emitting duration (e.g., T2 of the green light-emitting element). Once the gate scan signal is provided to the g gate lines corresponding to the corresponding first voltage signal lines to turn on the sub-pixel corresponding to the light-emitting element of the (K+2)th second voltage branch signal line connected to the k second voltage branch signal lines in all p groups of second voltage branch signal lines, the light-emitting element of the third color (e.g., a blue light-emitting element) in the light-emitting substrate controlled by the corresponding first voltage signal line is configured to emit light (e.g., blue light) within the light-emitting duration (e.g., T3 of the blue light-emitting element). In one example, the reflective display panel is a reflective liquid crystal display panel. By this driving method, light emission begins when the liquid crystal has not yet completed the response. Because the light-emitting duration is extended, higher brightness can be achieved in the reflective display panel.

[0117] In some embodiments, the reflective display panel is a high-frequency reflective liquid crystal display panel. In this type of display panel, the image frame is much shorter. Once the gate signal is scanned in an area of ​​the reflective display panel (e.g., an area corresponding to a corresponding first voltage signal line in the light-emitting substrate), the corresponding light-emitting element in the light-emitting substrate is turned on to emit light. In this way, the light-emitting duration is extended, and a higher brightness in the reflective display panel can be achieved without higher energy consumption.

[0118] In one example, the scanning duration of scanning a row of light emitting elements in the reflective display panel is t0, and the total scanning duration of scanning m rows of light emitting elements in the reflective display panel is t1 (eg, Figure 6As shown), where t1=m×t0. In another example, the first starting time point for providing the gate scanning signal to the m rows of light-emitting elements corresponding to the first voltage signal line Pn in the reflective display panel is represented as Tn, and the second starting time point for providing the gate scanning signal to the m rows of light-emitting elements corresponding to the first voltage signal line P(n+1) in the reflective display panel is represented as T(n+1); the time difference between Tn and T(n+1) is t1.

[0119] In one example, the initial time point of the image frame is ti. At the end of ti, the g gate lines corresponding to the first of the M light-emitting control units are scanned. The duration of scanning the g gate lines corresponding to the first of the M light-emitting control units is t1. At the end of (ti+t1), all red light-emitting elements in the first of the M light-emitting control units are configured to emit red light within the T1 duration. At the end of (ti+t1), the g gate lines corresponding to the second of the M light-emitting control units are scanned. The duration of scanning the g gate lines corresponding to the second of the M light-emitting control units is t1. At the end of (ti+2t1), all red light-emitting elements in the second of the M light-emitting control units are configured to emit red light within the T1 duration. At the end of (ti+2t1), the g gate lines corresponding to the third of the M light-emitting control units are scanned. The duration of scanning the g gate lines corresponding to the third of the M light-emitting control units is t1. At the end of (ti+3t1), all red light emitting elements in the third of the M light emitting control units are configured to emit red light during the duration of T1. Similarly, at the end of (ti+M×t1), all red light emitting elements in the mth of the M light emitting control units are configured to emit red light during the duration of T1.

[0120] At the end of (ti+M×t1), scanning of the g gate lines corresponding to the first of the M light-emitting control units begins. The duration of scanning the g gate lines corresponding to the first of the M light-emitting control units is t1. At the end of (ti+M×t1+t1), all green light-emitting elements in the first of the M light-emitting control units are configured to emit green light within the duration of T2. At the end of (ti+M×t1+t1), scanning of the g gate lines corresponding to the second of the M light-emitting control units begins. The duration of scanning the g gate lines corresponding to the second of the M light-emitting control units is t1. At the end of (ti+M×t1+2t1), all green light-emitting elements in the second of the M light-emitting control units are configured to emit green light within the duration of T2. At the end of (ti+M×t1+2t1), scanning of the g gate lines corresponding to the third of the M light-emitting control units begins. The duration of scanning the g gate lines corresponding to the third of the M light-emitting control units is t1. At the end of (ti+M×t1+3t1), all green light emitting elements in the third of the M light emitting control units are configured to emit green light during the duration of T2. Similarly, at the end of (ti+M×t1+M×t1), all green light emitting elements in the mth of the M light emitting control units are configured to emit green light during the duration of T1.

[0121] At the end of (ti+2M×t1), scanning of the g gate lines corresponding to the first of the M light-emitting control units begins. The duration of scanning the g gate lines corresponding to the first of the M light-emitting control units is t1. At the end of (ti+2M×t1+t1), all blue light-emitting elements in the first of the M light-emitting control units are configured to emit blue light within the duration of T3. At the end of (ti+2M×t1+t1), scanning of the g gate lines corresponding to the second of the M light-emitting control units begins. The duration of scanning the g gate lines corresponding to the second of the M light-emitting control units is t1. At the end of (ti+2M×t1+2t1), all blue light-emitting elements in the second of the M light-emitting control units are configured to emit blue light within the duration of T3. At the end of (ti+2M×t1+2t1), scanning of the g gate lines corresponding to the third of the M light-emitting control units begins. The duration of scanning the g gate lines corresponding to the third of the M light-emitting control units is t1. At the end of (ti+2M×t1+3t1), all blue light emitting elements in the third of the M light emitting control units are configured to emit blue light during the T3 duration. Similarly, at the end of (ti+2M×t1+M×t1), all blue light emitting elements in the mth of the M light emitting control units are configured to emit blue light during the T3 duration.

[0122] Compare Figure 5 and Figure 6 , Figure 5 The individual light emitting elements in the are configured to emit light for a shorter period of time. Figure 5 In the example, the total luminous duration of the luminous elements of the same color in the M luminous control units is T1, and in Figure 6 , the total lighting duration of the light-emitting elements of the same color in a corresponding one of the M light-emitting control units is T1. Figure 5 The driving method shown requires a larger driving current to achieve the same Figure 6 In one example, Figure 5 The driving method shown uses a pulse width modulation scheme.

[0123] Figure 7 is a schematic diagram showing the structure of a light emitting control unit in a light emitting substrate according to some embodiments of the present disclosure. Figure 7 yes Figure 4 Magnified view of . Figure 7 , the light emitting control unit includes a 2×2 micro LED array. Optionally, the array includes 2×2 red micro LEDs, 2×2 green micro LEDs and 2×2 blue micro LEDs. Figure 7 As shown, the light emitting elements in the Pth subunit SU(P) are commonly connected to the Pth first voltage branch signal line Pb(P). In the Pth subunit SU(P), micro LEDs of the same color are commonly connected to the same second voltage signal line. In one example, the red light emitting elements are commonly connected to the second voltage signal line N1-j, the green light emitting elements are commonly connected to the second voltage signal line N2-j, and the blue light emitting elements are commonly connected to the same second voltage signal line. Figure 7 In some embodiments, the light emitting substrate further includes at least one gas release through hole to prevent gas defects during a high temperature manufacturing process. Figure 7 The LED bonding points are also shown. Figure 8 for Figure 7 A magnified view of the LED bonding point in Figure 1.

[0124] Fig. 9 is a schematic diagram showing the structure of a backplane for bonding a micro-LED of a light-emitting substrate according to some embodiments of the present disclosure. Fig. 9In some embodiments, the backplane includes a base substrate BS, a black matrix BM on the base substrate BS, a first resin layer RS1 located on a side of the black matrix BM away from the base substrate BS, a first passivation layer PVX1 located on a side of the first resin layer RS1 away from the base substrate BS, a first metal layer MT1 located on a side of the first passivation layer PVX1 away from the base substrate BS, a second passivation layer PVX2 located on a side of the first metal layer MT1 and the first passivation layer PVX1 away from the base substrate BS, a second resin layer RS2 located on a side of the second passivation layer PVX2 away from the base substrate BS, a third passivation layer PVX3 located on a side of the second resin layer RS2 away from the base substrate BS, a second metal layer MT2 located on a side of the third passivation layer PVX3 away from the base substrate BS, and a fourth passivation layer PVX4 located on a side of the second metal layer MT2 away from the base substrate BS. The second metal layer MT2 is connected to the first metal layer MT through a through hole penetrating the third passivation layer PVX3, the second resin layer RS2, and the second passivation layer PVX2.

[0125] In some embodiments, the light-emitting substrate includes a base substrate BS, a black matrix BM on the base substrate BS; a first metal layer MT1 and a second metal layer MT2 located on a side of the black matrix BM away from the base substrate BS; and at least one insulating layer, which separates the first metal layer MT1 from the second metal layer MT2. The orthographic projections of the first metal layer MT1 and the second metal layer MT1 on the base substrate BS are within the orthographic projections of the black matrix BM on the base substrate BS. Optionally, the black matrix BM is confined to an area with a pad. Optionally, the orthographic projections of all metal layers on the base substrate BS are within the orthographic projections of the black matrix BM on the base substrate BS.

[0126] In some embodiments, the light emitting substrate further includes a first resin layer RS1 between the black matrix BM and the first metal layer MT1. Optionally, the at least one insulating layer includes a second resin layer RS2.

[0127] In some embodiments, the light emitting substrate further includes a first passivation layer PVX1 between the first resin layer RS1 and the first metal layer MT1. Optionally, the at least one insulating layer further includes a second passivation layer PVX2 between the second resin layer RS2 and the first metal layer MT1, and a third passivation layer PVX3 between the second resin layer RS2 and the second metal layer MT2.

[0128] In some embodiments, the light-emitting substrate further comprises a fourth passivation layer PVX4 located on a side of the second metal layer MT2 away from the base substrate BS; and at least two through holes, the at least two through holes penetrating the fourth passivation layer PVX4 and partially exposing the surface of the second metal layer MT2. Optionally, the light-emitting substrate further comprises a plurality of first gas release through holes arranged in a first array and a plurality of second gas release through holes arranged in a second array.

[0129] Portions of the second metal layer MT2 may be used as the first pad BP1 and the second pad BP2 to bond the micro-LED. In one example, the first metal layer MT1 and the second metal layer MT2 are made of copper or a copper-containing metal material. In some embodiments, nickel-gold may be formed on top of the first pad BP1 and the second pad BP2 using a nickel-gold plating process, and then indium metal may be plated on top of the nickel-gold. Typically, the micro-LED electrode is made of a gold material, which has a good bonding affinity with the indium material on the first pad BP1 and the second pad BP2.

[0130] In some embodiments, each of the first metal layer MT1 and the second metal layer MT2 includes copper. Optionally, the second metal layer MT2 further includes nickel gold on the surface exposed by the at least two through-hole portions. Optionally, the second metal layer MT2 further includes indium tin oxide on the surface exposed by the at least two through-hole portions.

[0131] The front light source is arranged at the top of the reflective display panel. In order to prevent the reduction of the image display contrast due to the light reflection of the ambient light on the metal layer, a black matrix is ​​formed to block the ambient light from irradiating on the first metal layer MT1 or the second metal layer MT2. The presence of the first resin layer RS1 prevents the contamination of the CVD chamber caused by the volatilization of the black matrix material during the deposition of the material of the first passivation layer PVX1. The presence of the first passivation layer PVX1 prevents the oxidation of the first metal layer MT1 by the first resin layer RS1. Similarly, the second passivation layer PVX2 and the third passivation layer PVX3 prevent the oxidation of the first metal layer MT1 or the second metal layer MT2 by the second resin layer RS2. The second resin layer RS2 can reduce the total load of the front light source by reducing the coupling capacitance between the first metal layer MT1 and the second metal layer MT2. The fourth passivation layer PVX4 prevents the electrode material (e.g., the second metal layer MT2) in the front light source from bubbling poorly.

[0132] In some embodiments, the backplane further comprises an indium tin oxide layer located on the side of the fourth passivation layer PVX4 and the second metal layer MT2 away from the base substrate BS. The indium tin oxide layer is used to bond the flexible printed circuit. The fourth passivation layer PVX4 prevents the surface of the indium tin oxide layer from being poorly hazed.

[0133] Fig.10is a schematic diagram showing the structure of a backplane for bonding a micro-LED of a light-emitting substrate according to some embodiments of the present disclosure. Fig.10 The back plate includes a first pad BP1 and a second pad BP2 made of indium tin oxide. The first pad BP1 and the second pad BP2 are respectively connected to the second metal layer MT2 through vias penetrating the fourth passivation layer PVX4.

[0134] Fig.11A Schematic diagram showing a signal line layer and a black matrix layer in a light-emitting substrate according to some embodiments of the present disclosure. Fig.11A , at least one of the signal lines SL along the column direction (for example, k second voltage signal lines or signal lines for connecting adjacent pads BP) may not run through the entire light-emitting area of ​​the substrate along the column direction, that is, the extension dimension of the at least one signal line SL along the column direction is smaller than the dimension of the light-emitting area of ​​the light-emitting substrate along the column direction. In some embodiments, the light-emitting substrate also includes a black matrix BM at the position where the signal line is missing. In some embodiments, the black matrix BM and the signal lines have a structure such that the orthographic projection of the combination of the black matrix BM and the signal lines on the base substrate is a grid, optionally, a grid with substantially uniform density. By having such a structure, the light transmittance of the light-emitting substrate is more uniform. The brightness performance of the light-emitting substrate, especially when used as a front light of a reflective display panel, is more uniform throughout the entire light-emitting area. A better blanking effect can be achieved in a grid with evenly distributed black matrix strips and metal wires, further eliminating any adverse effects caused by the metal wires. Fig.11A In the embodiment, the light emitting substrate includes a plurality of rows of gas release through holes, and there is a row of gas release through holes between any two adjacent signal lines in the signal lines SL extending along the row direction.

[0135] Fig. 11B Schematic diagram showing a signal line layer and a black matrix layer in a light-emitting substrate according to some embodiments of the present disclosure. Fig. 11B , the gas release through holes are arranged in multiple rows, and two adjacent rows of gas release through holes are separated by m adjacent signal lines SL extending along the row direction, m≥2. Optionally, m=2. Similarly, the gas release through holes are arranged in multiple columns, and two adjacent columns of gas release through holes are separated by n adjacent signal lines SL extending along the column direction, n≥2. Optionally, n=2.

[0136] Similarly, in some embodiments, at least one of the signal lines SL along the row direction (e.g., the first voltage branch signal line, the second voltage branch signal line) may not run through the entire light-emitting area of ​​the substrate along the row direction, that is, the extension dimension of the at least one signal line SL along the row direction is smaller than the dimension of the light-emitting area of ​​the light-emitting substrate along the row direction. The black matrix BM may be arranged at a position where the signal line is missing. In some embodiments, the black matrix BM and the signal line have a structure such that the positive projection of the combination of the black matrix BM and the signal line on the base substrate is a grid, optionally, a grid with substantially uniform density.

[0137] refer to Fig. 9 , Fig.10 11 , the signal lines along the row direction may be part of the second metal layer MT2 , and the signal lines along the column direction may be part of the first metal layer MT1 .

[0138] Reference Figure 7 In some embodiments, the metal lines along the row direction and the metal lines (or black matrix strips) along the column direction cross each other at an angle other than 90 degrees. Generally, the metal lines in the reflective display panel along the row direction and along the column direction are perpendicular to each other. By making the metal lines along the row direction and the metal lines along the column direction in the light-emitting substrate cross each other at an angle other than 90 degrees, Moire pattern display defects can be avoided or reduced.

[0139] In one example, the metal lines along the row direction in the light-emitting substrate are substantially parallel to the metal lines along the row direction in the reflective display panel; and the metal lines along the column direction in the light-emitting substrate are not parallel to the metal lines along the column direction in the reflective display panel (e.g., at a non-zero angle).

[0140] In another example, the metal lines along the column direction in the light-emitting substrate are substantially parallel to the metal lines along the column direction in the reflective display panel; and the metal lines along the row direction in the light-emitting substrate are not parallel to the metal lines along the row direction in the reflective display panel (e.g., at a non-zero angle).

[0141] In some embodiments, the light emitting substrate includes a plurality of signal lines (eg, Fig.11A or Fig. 11B In some embodiments, the plurality of signal lines include a plurality of signal lines extending along a first direction and a plurality of signal lines extending along a second direction, the second direction being different from the first direction. Optionally, the plurality of signal lines extending along the first direction are a portion of one of the first metal layer MT1 and the second metal layer MT2. Optionally, the plurality of signal lines extending along the second direction are a portion of the other of the first metal layer MT1 and the second metal layer MT2.

[0142] In some embodiments, the black matrix BM includes a plurality of first black matrix strips extending along a first direction and a plurality of second black matrix strips extending along a second direction. Optionally, the orthographic projection of the combination of the black matrix BM and the plurality of signal lines on the base substrate BS is a grid. Optionally, the plurality of first black matrix strips have the same size along the first direction. Optionally, the plurality of second black matrix strips have the same size along the second direction. Optionally, the orthographic projections of the plurality of signal lines extending along the first direction on the base substrate are within the orthographic projections of the plurality of first black matrix strips on the base substrate. Optionally, the orthographic projections of the plurality of signal lines extending along the second direction on the base substrate are within the orthographic projections of the plurality of second black matrix strips on the base substrate.

[0143] In some embodiments, a plurality of first black matrix strips are arranged along the second direction, and a plurality of second black matrix strips are arranged along the first direction. Optionally, any two adjacent first black matrix strips among the plurality of first black matrix strips are spaced apart by the same distance along the second direction. Optionally, any two adjacent second black matrix strips among the plurality of second black matrix strips are spaced apart by the same distance along the first direction. Optionally, a line width of a corresponding one of the plurality of signal lines along the first direction is smaller than a line width of the black matrix strip along the first direction. Optionally, a line width of a corresponding one of the plurality of signal lines along the second direction is smaller than a line width of the black matrix strip along the second direction.

[0144] In some embodiments, the plurality of signal lines extending along the first direction include a second voltage signal line. Optionally, the plurality of signal lines extending along the second direction include a first voltage branch signal line and a second voltage branch signal line.

[0145] Fig.12 yes Fig.11A Magnified view of the magnified area of ​​. Fig.12 In some embodiments, a black matrix BM is further provided, wherein the signal line SL is provided. Optionally, the orthographic projection of the black matrix BM on the base substrate covers the orthographic projection of the signal line SL. In one example, the orthographic projection of the signal line SL is within the orthographic projection of the black matrix BM. In another example, the size of the signal line SL along the row direction is smaller than the size of the black matrix BM along the row direction; the size of the signal line SL along the column direction is smaller than the size of the black matrix BM along the column direction.

[0146] Fig.13 is along Fig.11A A-A' line cross-sectional view. Fig.13, in some embodiments, the gas release through hole includes a first gas release through hole V1 and a second gas release through hole V2. The first gas release through hole V1 penetrates the first passivation layer PVX1 and the second passivation layer PVX2, thereby exposing the surface of the first resin layer RS1. The second resin layer RS2 extends into the first gas release through hole V1. The second gas release through hole V2 penetrates the third passivation layer PVX3 and the fourth passivation layer PVX4, thereby exposing the surface of the second resin layer RS2. The first resin layer RS1 and the second resin layer RS2 are optionally made of organic materials, which are easy to release gas during high temperature treatment. The first passivation layer PVX1, the second passivation layer PVX2, the third passivation layer PVX3 and the fourth passivation layer PVX4 are optionally made of inorganic materials. In the absence of a gas release through hole, the gas released by the first resin layer RS1 and the second resin layer RS2 may cause one or more of the passivation layers to crack, thereby causing rupture. In the present light-emitting substrate, the orthographic projections of the first gas release through hole V1 and the second gas release through hole V2 on the base substrate at least partially overlap each other, for example, the first gas release through hole V1 and the second gas release through hole V2 are aligned in a vertical direction (a direction perpendicular to the substrate). Optionally, the light-emitting substrate includes a plurality of first gas release through holes arranged in a first array and a plurality of second gas release through holes arranged in a second array. This particular structure facilitates the release of gas generated by the resin layer.

[0147] Fig.14 FIG. 4 shows the arrangement of signal lines along the peripheral area of ​​the light emitting substrate according to some embodiments of the present disclosure. Fig.14 In the peripheral area, the light-emitting substrate includes a first voltage signal line SL1 (for example, any one or more of the M first voltage signal lines include P1, ..., Pj, ..., PM for any one or more of the plurality of light-emitting control units CU (i, j)) and a second voltage signal line (for example, any one or more of the M groups of second voltage signal lines G1, Gj, ..., GM). In some embodiments, the second voltage signal lines for providing the second voltage to the light-emitting elements of the same color are arranged adjacent to each other. In one example, as Fig.14 As shown, the second voltage signal lines SL2-cs1 for providing the second voltage to the light-emitting elements of the first color are arranged adjacent to each other, and the second voltage signal lines SL2-cs2 for providing the second voltage to the light-emitting elements of the second color are arranged adjacent to each other, etc. In another example, the second voltage signal lines for providing the second voltage to the light-emitting elements in the same light-emitting control unit are arranged adjacent to each other.

[0148] Fig.15 Schematic diagram showing the arrangement of signal lines in a light-emitting substrate according to some embodiments of the present disclosure. Fig.15, the signal line (for example, the second voltage signal line in the M group of second voltage signal lines G1, Gj, ..., GM) extends from the light emitting area to one side of the light emitting substrate and is connected to the integrated circuit IC in the peripheral area. This arrangement has a greater signal line distribution density.

[0149] Fig.16 Schematic diagram showing the arrangement of signal lines in a light-emitting substrate according to some embodiments of the present disclosure. Fig.16 The signal lines (such as the second voltage signal lines in the M groups of second voltage signal lines G1, Gj, ..., GM) extend from the light-emitting area to both sides of the light-emitting substrate and are respectively connected to two integrated circuits in two peripheral areas on both sides. Fig.15 Compared with the arrangement in Fig.16 The arrangement in can achieve a higher aperture ratio, a lower signal line distribution density in the light emitting substrate, or alternatively, allow more light emitting control units to be arranged in the light emitting substrate.

[0150] For the purpose of illustration and description, the above description of the embodiments of the present invention has been given. It is not exhaustive, nor is it intended to limit the present invention to the precise form or exemplary embodiments disclosed. Therefore, the foregoing description should be considered illustrative rather than restrictive. Obviously, many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to explain the principles of the present invention and its best mode practical application, so that those skilled in the art can understand the various embodiments of the present invention and the various modifications suitable for the specific use or implementation under consideration. The scope of the present invention is intended to be defined by the appended claims and their equivalents, wherein all terms are meant to have the broadest reasonable meaning unless otherwise stated. Therefore, the term "the present invention" and the like do not necessarily limit the scope of the claims to a specific embodiment, and the reference to the exemplary embodiments of the present invention does not mean a limitation of the present invention, and such limitation should not be inferred. The present invention is limited only by the spirit and scope of the appended claims. In addition, these claims may involve the use of "first", "second", etc., followed by a noun or element. These terms should be understood as nomenclature, and should not be interpreted as limiting the number of elements modified by these nomenclatures, unless a specific number has been given. Any advantages and benefits described may not apply to all embodiments of the present invention. It should be understood that those skilled in the art may make changes to the described embodiments without departing from the scope of the present invention as defined by the appended claims. In addition, the elements and assemblies in this disclosure are not intended to be contributed to the public, regardless of whether the element or assembly is clearly described in the appended claims.

Claims

1. A light-emitting substrate, comprising: a plurality of light emitting control units arranged in M ​​rows and N columns, M being an integer greater than or equal to one, and N being an integer greater than or equal to one; Wherein, the corresponding columns in the N columns of light emitting control units include: M groups of second voltage signal lines, a corresponding group of the M groups of second voltage signal lines being connected to a corresponding one of the M light-emitting control units, the corresponding group of the M groups of second voltage signal lines comprising k second voltage signal lines, k being an integer greater than or equal to one; wherein the corresponding one of the plurality of light emitting control units comprises a plurality of light emitting elements arranged in m rows and n columns; The corresponding one of the plurality of light emitting control units comprises: p subunits, p is an integer greater than or equal to one; m is an integer greater than or equal to p, and n is an integer greater than or equal to one; the Pth subunit among the p subunits includes n columns of light-emitting elements, 1≤P≤p; p first voltage branch signal lines respectively connected to the p sub-units; p groups of second voltage branch signal lines, a corresponding group of the p groups of second voltage branch signal lines comprising k second voltage branch signal lines; Wherein, the p first voltage branch signal lines are electrically connected; and The k second voltage branch signal lines are respectively electrically connected to the k second voltage signal lines in the corresponding group of the M groups of second voltage signal lines; The first ends of the n columns of light emitting elements in the P-th subunit are commonly connected to the P-th first voltage branch signal line among the p first voltage branch signal lines; and A corresponding second end of the second ends of the n columns of light emitting elements in the P-th subunit is connected to one of the k second voltage branch signal lines in the P-th group of the p groups of second voltage branch signal lines.

2. The light-emitting substrate according to claim 1, wherein: Each of the n columns of light emitting elements in the corresponding one of the plurality of light emitting control units includes a plurality of rows of light emitting elements electrically connected in series.

3. The light-emitting substrate according to claim 1 or 2, wherein: The multiple rows of light emitting elements in a corresponding column of the n columns of light emitting elements have the same color.

4. The light-emitting substrate according to claim 3, wherein: The corresponding one of the n columns of light emitting elements comprises light emitting elements of a Kth color among k different colors, 1≤K≤k; and The light emitting elements in the (n / k)th column among the n columns of light emitting elements have the Kth color.

5. The light emitting substrate according to claim 4, wherein: Second ends of the (n / k) columns among the n columns of light emitting elements are commonly connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in the Pth group among the p groups of second voltage branch signal lines.

6. The light-emitting substrate according to any one of claims 1, 2, 4 and 5, wherein: m is (x*p), and n is (y*k), wherein x is an integer greater than one, and y is an integer greater than one.

7. The light-emitting substrate according to claim 6, wherein: The n columns of light emitting elements in the Pth subunit include y groups of columns; The Yth group of the y groups of columns includes k columns of light emitting elements each having k different colors, 1≤Y≤y; and The color pattern in the y group columns is the same.

8. The light emitting substrate according to claim 1, wherein: k＝3。 9 . The light emitting substrate according to claim 1 , further comprising at least one first voltage signal line connected to the p first voltage branch signal lines in at least one of the M light emitting control units.

10. The light emitting substrate according to claim 1, wherein: The n columns of light emitting elements include n columns of micro light emitting diodes.

11. The light emitting substrate according to claim 1, comprising: base substrate; a first metal layer and a second metal layer on the base substrate; as well as At least one insulating layer separates the first metal layer from the second metal layer.

12. The light emitting substrate according to claim 11, further comprising a plurality of signal lines; in, The plurality of signal lines include a plurality of signal lines extending along a first direction and a plurality of signal lines extending along a second direction, the second direction being different from the first direction; The plurality of signal lines extending along the first direction are part of one of the first metal layer and the second metal layer; as well as The plurality of signal lines extending along the second direction are part of the other of the first metal layer and the second metal layer.

13. The light-emitting substrate according to claim 12, further comprising a black matrix on the base substrate; in, The orthographic projections of the first metal layer and the second metal layer on the base substrate are within the orthographic projections of the black matrix on the base substrate.

14. The light emitting substrate according to claim 13, wherein: The black matrix includes a plurality of first black matrix strips extending along the first direction and a plurality of second black matrix strips extending along the second direction; and The orthographic projection of a combination of the black matrix and the plurality of signal lines on the base substrate is a grid.

15. The light emitting substrate according to claim 14, wherein: The plurality of first black matrix strips are arranged along the second direction; The plurality of second black matrix strips are arranged along the first direction; Any two adjacent first black matrix strips among the plurality of first black matrix strips are spaced apart by the same distance along the second direction; as well as Any two adjacent second black matrix strips among the plurality of second black matrix strips are spaced apart by the same distance along the first direction.

16. The light emitting substrate according to claim 14, wherein: A line width of a corresponding one of the plurality of signal lines along the first direction is smaller than a line width of a black matrix strip along the first direction; and A line width of a corresponding one of the plurality of signal lines along the second direction is smaller than a line width of a black matrix bar along the second direction.

17. The light emitting substrate according to any one of claims 12 to 16, wherein: The plurality of signal lines extending along the first direction include a second voltage signal line; and The plurality of signal lines extending along the second direction include a first voltage branch signal line and a second voltage branch signal line.

18. The light emitting substrate according to claim 13, further comprising a first resin layer between the black matrix and the first metal layer; in, The at least one insulating layer includes a second resin layer.

19. The light emitting substrate according to claim 18, further comprising a first passivation layer between the first resin layer and the first metal layer; in, The at least one insulating layer further includes a second passivation layer between the second resin layer and the first metal layer, and a third passivation layer between the second resin layer and the second metal layer.

20. The light emitting substrate according to claim 19, further comprising a fourth passivation layer located on a side of the second metal layer away from the base substrate; and At least two through holes penetrate the fourth passivation layer and partially expose a surface of the second metal layer.

21. The light emitting substrate according to claim 20, wherein: Each of the first metal layer and the second metal layer comprises copper; and The second metal layer further includes nickel-gold on the surface exposed by the at least two via portions.

22. The light-emitting substrate according to claim 20, wherein: Each of the first metal layer and the second metal layer comprises copper; and The second metal layer further includes indium tin oxide on the surface exposed by the at least two via portions.

23. The light emitting substrate according to any one of claims 11-16 and 18-22, further comprising at least one gas release through hole.

24. The light-emitting substrate according to claim 23, wherein: The at least one gas release through hole includes a first gas release through hole penetrating the first passivation layer and the second passivation layer, and a second gas release through hole penetrating the third passivation layer and the fourth passivation layer.

25. The light emitting substrate according to claim 24, wherein: Orthographic projections of the first gas release through hole and the second gas release through hole on the base substrate at least partially overlap with each other.

26. The light emitting substrate of claim 24, comprising a plurality of first gas release through holes arranged in a first array and a plurality of second gas release through holes arranged in a second array.

27. A display device comprising the light emitting substrate according to any one of claims 1 to 26, a reflective display panel, and an integrated circuit connected to the reflective display panel; in, The light emitting substrate is located on the display side of the reflective display panel.

28. The display device according to claim 27, wherein: The reflective display panel includes a plurality of first signal lines and a plurality of second signal lines; The light-emitting substrate includes a plurality of signal lines; The plurality of signal lines include a plurality of signal lines extending along a first direction and a plurality of signal lines extending along a second direction, the second direction being different from the first direction; The plurality of signal lines extending along the first direction cross the plurality of first signal lines at an angle greater than zero and less than 20 degrees, and / or the plurality of signal lines extending along the second direction cross the plurality of second signal lines at an angle greater than zero and less than 20 degrees; and The plurality of first signal lines are a plurality of data lines, and the plurality of second signal lines are a plurality of gate lines.

29. A method for driving a light-emitting substrate; in, The light emitting substrate includes a plurality of light emitting control units arranged in M ​​rows and N columns, where M is an integer greater than or equal to one, and N is an integer greater than or equal to one; Wherein, the method comprises: Connecting a corresponding group of M groups of second voltage signal lines to a corresponding one of the M light-emitting control units, wherein the corresponding group of the M groups of second voltage signal lines includes k second voltage signal lines, where k is an integer greater than or equal to one; wherein the corresponding one of the plurality of light emitting control units comprises a plurality of light emitting elements arranged in m rows and n columns; The corresponding one of the plurality of light emitting control units comprises p subunits, where p is an integer greater than or equal to one; m is an integer greater than or equal to p, and n is an integer greater than or equal to one; the Pth subunit of the p subunits comprises n columns of light emitting elements, 1≤P≤p; Wherein, the method further comprises: Connecting p first voltage branch signal lines to the p sub-units respectively; Respectively electrically connecting k second voltage branch signal lines to the k second voltage signal lines in the corresponding groups among the M groups of second voltage signal lines; providing a second voltage signal to p groups of second voltage branch signal lines, a corresponding group of the p groups of second voltage branch signal lines including the k second voltage branch signal lines; electrically connecting the p first voltage branch signal lines; and providing a first voltage signal to the p first voltage branch signal lines; connecting the first ends of the n columns of light emitting elements in the P-th subunit to the P-th first voltage branch signal line among the p first voltage branch signal lines; and A corresponding second end of the second ends of the n columns of light emitting elements in the P-th subunit is connected to one of the k second voltage branch signal lines in the P-th group of the p groups of second voltage branch signal lines.

30. The method of claim 29, further comprising: applying the first voltage signal to the M light emitting control units in sequence; as well as During a period in which the first voltage signal is applied to the corresponding one of the M light emitting control units, the second voltage signal is sequentially applied to the k second voltage signal lines.

31. The method according to claim 30, wherein: During the time period in which the first voltage signal is applied to the corresponding one of the M light emitting control units, the first voltage signal is simultaneously applied to the p first voltage branch signal lines; as well as During the time period when the second voltage signal is applied to the Kth second voltage signal line among the k second voltage signal lines, the second voltage signal is simultaneously applied to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines, 1≤K≤k.

32. The method according to claim 31, wherein: During the time period when the first voltage signal is applied to the corresponding one of the M light-emitting control units, the first voltage signal is simultaneously applied to the first ends of the p sub-units through the p first voltage branch signal lines respectively; as well as During the time period when the second voltage signal is applied to the Kth second voltage signal line among the k second voltage signal lines, the second voltage signal is simultaneously applied to the second end connected to the Kth second voltage branch signal line among the k second voltage branch signal lines, and the second ends connected to the Kth second voltage branch signal line come from the p sub-units respectively.

33. The method according to any one of claims 30 to 32, wherein: The duration of an image frame consists of TK represents the light-emitting duration of the light-emitting element of the Kth color in the M light-emitting control units; During the TK duration, the first voltage signal is sequentially applied to the M light emitting control units, and the second voltage signal is sequentially applied to K-th second voltage signal lines from the M groups of second voltage signal lines; and The light emitting elements of the K-th color in the M light emitting control units are configured to emit red light one by one and sequentially during a TK duration.

34. The method of claim 33, wherein: At a first time point Tn, the Kth second voltage signal line in the first light emitting control unit of two adjacent light emitting control units is provided with the second voltage signal; At a second time point T(n+1), the Kth second voltage signal line in the second light emitting control unit of the two adjacent light emitting control units is provided with the second voltage signal; and T(n+1)=Tn+TK / M.

35. A method for driving a display device, comprising: Assembling a reflective display panel with a light-emitting substrate, wherein the light-emitting substrate includes a plurality of light-emitting control units arranged in M ​​rows and N columns, where M is an integer greater than or equal to one, and N is an integer greater than or equal to one; connecting the M first voltage signal lines to the M light emitting control units in corresponding columns of the N columns of light emitting control units respectively; and connecting a corresponding group of M groups of second voltage signal lines to a corresponding one of the M light-emitting control units, the corresponding group of the M groups of second voltage signal lines comprising k second voltage signal lines, where k is an integer greater than or equal to one; wherein the corresponding one of the plurality of light emitting control units comprises p subunits, where p is an integer greater than or equal to one; Wherein, the method further comprises driving the light-emitting substrate according to the method according to claim 31.

36. The method according to claim 35, further comprising applying gate scanning signals to g gate lines corresponding to the corresponding first voltage signal lines, respectively, to turn on the sub-pixels corresponding to the light-emitting elements connected to the K-th second voltage branch signal line among the k second voltage branch signal lines among all p groups of second voltage branch signal lines; in, After applying gate scanning signals to the g gate lines corresponding to the corresponding first voltage signal lines respectively to turn on the sub-pixels corresponding to the light-emitting elements connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines, the first voltage signal is applied to the corresponding one of the M first voltage signal lines, and the second voltage signal is applied to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines.

37. The method of claim 36, wherein: The starting time point of the light-emitting element connected to the Kth second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines is later than the starting time point of applying the gate scanning signal to the first gate line among the g gate lines corresponding to the corresponding first voltage signal line (m×t0), where t0 is the duration of scanning a row of light-emitting elements in the reflective display panel.

38. The method according to claim 36, further comprising applying gate scanning signals to the g gate lines corresponding to the corresponding first voltage signal lines, respectively, to turn on the sub-pixels corresponding to the light-emitting elements connected to the (K+1)th second voltage branch signal line among the k second voltage branch signal lines among all p groups of second voltage branch signal lines; and Upon completion of applying gate scan signals to the g gate lines corresponding to the corresponding first voltage signal lines to turn on the sub-pixels corresponding to the light-emitting elements connected to the (K+1)th second voltage branch signal lines, the first voltage signal is applied to the corresponding one of the M first voltage signal lines, and the second voltage signal is applied to the (K+1)th second voltage branch signal line among the k second voltage branch signal lines in all p groups of second voltage branch signal lines.

39. The method of claim 36, wherein: The light emitting element connected to the K-th second voltage branch signal line among the k second voltage branch signal lines among all p groups of second voltage branch signal lines is configured to emit light within a TK duration; as well as The sum of the light emitting durations of the light emitting elements connected to all p groups of second voltage branch signal lines is equal to the duration of an image frame in the reflective display panel.

Images