CN115728988B

CN115728988B - Display device

Info

Publication number: CN115728988B
Application number: CN202110995458.5A
Authority: CN
Inventors: 刘丽艳; 王新星; 柳在健; 孙雪菲; 杨明; 陈婉芝
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2024-08-06
Anticipated expiration: 2041-08-27
Also published as: CN115728988A

Abstract

The display device comprises a front light source module and a reflective display panel, wherein the light emitting side of the front light source module faces the reflective display panel, the front light source module comprises a plurality of light emitting repeating units distributed in an array, the light emitting repeating units comprise one or more Light Emitting Diode (LED) light sources, one or more first wires distributed along a first direction and one or more second wires distributed along a second direction, and the first direction and the second direction are intersected; the first trace and the second trace satisfy at least one of: the included angle between the first wiring and the second direction or the opposite direction of the second direction is a first acute angle; the included angle between the second wiring and the first direction or the opposite direction of the first direction is a second acute angle, and the first acute angle is between 3 degrees and 20 degrees; the second acute angle is between 3 ° and 20 °, and the reflective display panel includes a plurality of reflective repeating units distributed in an array, the reflective repeating units configured to reflect light rays or ambient light emitted from the received LED light sources.

Description

Display device

Technical Field

Embodiments of the present disclosure relate to, but are not limited to, display technology, and more particularly, to a display device.

Background

Liquid Crystal Displays (LCDs), liquid CRYSTAL DISPLAY, can be classified into transmissive, reflective, and semi-reflective semi-transmissive ones according to the lighting mode. Among them, the reflective LCD is increasingly applied to portable electronic terminals such as cellular phones, notebook computers, digital cameras, personal digital assistants, and the like.

Disclosure of Invention

The embodiment of the disclosure provides a display device capable of improving display effect.

The embodiment of the disclosure provides a display device, which comprises a reflective display panel and a front light source module, wherein the light emitting side of the front light source module faces to the reflective display panel; the front light source module comprises a plurality of light emitting repeating units distributed in an array, wherein each light emitting repeating unit comprises one or more Light Emitting Diode (LED) light sources, one or more first wires distributed along a first direction and one or more second wires distributed along a second direction, and the first direction and the second direction are intersected; the first trace and the second trace satisfy at least one of: an included angle between the first wiring and the second direction or the opposite direction of the second direction is a first acute angle; an included angle between the second wiring and the first direction or the opposite direction of the first direction is a second acute angle; the reflective display panel includes a plurality of reflective repeating units distributed in an array, the reflective repeating units configured to reflect received light rays or ambient light emitted by the LED light sources.

In some exemplary embodiments, the first acute angle is between 3 ° and 20 °; the second acute angle is between 3 ° and 20 °.

In some exemplary embodiments, a plurality of the first wires are arranged at equal intervals; the second wirings are distributed at equal intervals.

In some exemplary embodiments, the first trace between the N-1 th row of LED light sources and the N-th row of LED light sources is parallel to the first trace between the N-th row of LED light sources and the n+1 th row of LED light sources, where N is a natural number between 2 and N-1, and N is the total number of rows of the LED light sources.

In some exemplary embodiments, the first trace between the N-1 th row of LED light sources and the N-th row of LED light sources is symmetrical with the first trace between the N-th row of LED light sources and the n+1 th row of LED light sources about a line of the N-th row of LED light sources, where N is a natural number between 2 and N-1, and N is a total number of rows of the LED light sources.

In some exemplary embodiments, the second trace between the M-1 th column of LED light sources and the M-1 th column of LED light sources is symmetrical about a line connecting the M-th column of LED light sources to the second trace between the M-th column of LED light sources and the m+1 th column of LED light sources, where M is a natural number between 2 and M-1, and M is a total number of columns of the LED light sources.

In some exemplary embodiments, each first trace is connected to two adjacent LED light sources in the same column, or each first trace is connected to two adjacent LED light sources in an adjacent column.

In some exemplary embodiments, the first trace has a width between 3 and 10 microns and the second trace has a width between 3 and 10 microns.

In some exemplary embodiments, a plurality of the light emitting repeat units are distributed in an array by at least one of: translation, mirroring, flipping, rotation.

In some exemplary embodiments, the reflective repeat unit has a first width along the first direction, the reflective repeat unit has a second width along the second direction, the light emitting repeat unit has a third width along the first direction, and the light emitting repeat unit has a fourth width along the second direction;

The difference between the first width and the third width is greater than 10 microns, and the difference between the second width and the fourth width is greater than 10 microns.

the first width is a non-integer multiple of the third width, and the second width is a non-integer multiple of the fourth width.

In some exemplary embodiments, the spacing between two said reflective repeat units adjacent in the first direction is between 6 and 40 microns and the spacing between two said reflective repeat units adjacent in the second direction is between 6 and 40 microns.

According to the display device provided by the embodiment of the disclosure, the design pattern of the front light source module is changed to weaken or eliminate the similar or multiple relation of the periodic structure patterns of the front light source module and the reflective LCD display panel, so that display defects such as Mura and the like can be eliminated.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosure. Other advantages of the present disclosure may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide an understanding of the technical aspects of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present disclosure and together with the embodiments of the disclosure, not to limit the technical aspects of the present disclosure.

FIG. 1a is a schematic diagram of a front-end light module;

FIG. 1b is a schematic diagram of a reflective display panel;

FIG. 1c is a schematic diagram of a screen display result obtained by stacking the front light module of FIG. 1a and the reflective display panel of FIG. 1 b;

Fig. 2a to 2f are schematic structural diagrams of six front-end light source modules according to an embodiment of the disclosure;

FIG. 3a is a schematic diagram of a front light module and a reflective display panel according to an embodiment of the disclosure;

fig. 3b is a schematic diagram of Mura effects of a display device according to an exemplary embodiment of the present disclosure;

Fig. 4a is a schematic structural view of still another front-end light source module according to an exemplary embodiment of the present disclosure;

FIG. 4b is a schematic diagram of a screen display result of the front light module of FIG. 4a and the reflective display panel of FIG. 1b after being stacked;

fig. 5a is a schematic structural view of a display device according to an exemplary embodiment of the present disclosure;

Fig. 5b is a schematic structural diagram of a display substrate according to an exemplary embodiment of the present disclosure;

Fig. 6a is a schematic structural view of yet another front-end light source module according to an exemplary embodiment of the present disclosure;

FIG. 6b is a schematic structural view of yet another reflective display panel provided in accordance with an exemplary embodiment of the present disclosure;

FIG. 6c is a schematic diagram of a screen display result of the front light module of FIG. 6a and the reflective display panel of FIG. 6b after being stacked;

Fig. 7a is a schematic structural view of still another front-end light source module according to an exemplary embodiment of the present disclosure;

FIG. 7b is a schematic diagram of a reflective display panel according to another exemplary embodiment of the present disclosure;

Fig. 7c is a schematic diagram of a screen display result after the front light module of fig. 7a and the reflective display panel of fig. 7b are stacked.

Detailed Description

Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Embodiments may be implemented in a number of different forms. One of ordinary skill in the art will readily recognize the fact that the manner and content may be changed into other forms without departing from the spirit and scope of the present disclosure. Accordingly, the present disclosure should not be construed as being limited to the following description of the embodiments. Embodiments of the present disclosure and features of embodiments may be combined with each other arbitrarily without conflict.

In the drawings, the size of one or more constituent elements, thicknesses of layers or regions may be exaggerated for clarity. Accordingly, one aspect of the present disclosure is not necessarily limited to this dimension, and the shape and size of one or more components in the drawings do not reflect true proportions. Further, the drawings schematically show ideal examples, and one mode of the present disclosure is not limited to the shapes or numerical values shown in the drawings, and the like.

The ordinal numbers of "first", "second", "third", etc. in the present specification are provided to avoid mixing of constituent elements, and are not intended to be limited in number. The term "plurality" in this disclosure means two or more in number.

In the present specification, for convenience, words such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate an azimuth or a positional relationship, are used to describe positional relationships of constituent elements with reference to the drawings, only for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus are not to be construed as limiting the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction of the described constituent elements. Therefore, the present invention is not limited to the words described in the specification, and may be appropriately replaced according to circumstances.

In this specification, the terms "mounted," "connected," and "connected" are to be construed broadly, unless explicitly stated or limited otherwise. For example, it may be a fixed connection, a removable connection, or an integral connection; may be a mechanical connection, or a connection; may be directly connected, or indirectly connected through intermediate members, or may be in communication with the interior of two elements. The meaning of the above terms in the present disclosure can be understood by one of ordinary skill in the art as appropriate.

In this specification, a transistor refers to an element including at least three terminals of a gate electrode (gate electrode), a drain electrode, and a source electrode. The transistor has a channel region between a drain (drain electrode terminal, drain region, or drain electrode) and a source (source electrode terminal, source region, or source electrode), and a current can flow through the drain, the channel region, and the source. In this specification, a channel region refers to a region through which current mainly flows.

In this specification, the first pole may be a drain electrode, the second pole may be a source electrode, or the first pole may be a source electrode, and the second pole may be a drain electrode. In addition, the gate may also be referred to as a control electrode. In the case of using transistors having opposite polarities, or in the case of a change in current direction during circuit operation, the functions of the "source" and the "drain" may be exchanged with each other. Thus, in this specification, "source" and "drain" may be interchanged.

In this specification, "connected" includes a case where constituent elements are connected together by an element having some electric action. The "element having a certain electric action" is not particularly limited as long as it can transmit and receive an electric signal between the constituent elements connected. Examples of the "element having some electric action" include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, other elements having various functions, and the like.

In the present specification, "parallel" means a state in which two straight lines form an angle of-10 ° or more and 10 ° or less, and therefore, a state in which the angle is-5 ° or more and 5 ° or less is also included. The term "perpendicular" refers to a state in which the angle formed by two straight lines is 80 ° or more and 100 ° or less, and thus includes a state in which the angle is 85 ° or more and 95 ° or less.

The term "about" in this disclosure refers to values that are not strictly limited to the limits, but are allowed to fall within the limits of the process and measurement errors.

In some exemplary embodiments, the reflective LCD display panel may include an array substrate and a color film substrate disposed opposite to each other and a liquid crystal layer interposed between the array substrate and the color film substrate. The array substrate is provided with a light reflecting layer for reflecting light incident from the outside. The light reflecting layer may specularly reflect incident light. For example, a pixel electrode may be used as the light reflecting layer, or the light reflecting layer may be provided on a side of the pixel circuit close to the substrate. In order to adapt to the scene with insufficient ambient light intensity, a front light source is added to the reflective LCD display panel, that is, the front light source is disposed on the light emitting side of the display panel. However, both the front-end light source and the reflective LCD display panel have periodic patterning (Pattern) and the superposition of the two layers may create a display unevenness (Mura) risk. As shown in fig. 1a, the front-end light source includes an array of light emitting diodes (LIGHT EMITTING LEDs) light sources, a plurality of transverse wires extending along a first direction and a plurality of longitudinal wires extending along a second direction, and the transverse wires are densely distributed, and after being overlapped with the reflective LCD display panel shown in fig. 1b, a poor display such as uneven brightness (Mura) shown in fig. 1c may occur.

At least one embodiment of the present disclosure provides a front-mounted light source module, including a plurality of light emitting repeating units distributed in an array, each light emitting repeating unit including one or more LED light sources, one or more first traces arranged along a first direction, and one or more second traces arranged along a second direction, where the first direction and the second direction intersect;

the first trace and the second trace satisfy at least one of:

the included angle between the first wiring and the second direction or the opposite direction of the second direction is a first acute angle;

the included angle between the second wiring and the first direction or the opposite direction of the first direction is a second acute angle.

Through researches, the closer the minimum repeating unit size in two layers of periodic structure patterns in the front light source module and the reflective LCD display panel is, the more serious the moire is; the minimum repeating unit size of the two-layer periodic structure pattern is in a multiple relationship, and the risk of Mura or shadow elimination can occur. According to the embodiment of the disclosure, the design pattern of the front light source module is changed to weaken or eliminate the similar or multiple relation of periodic structure patterns of the front light source module and the reflective LCD display panel, so that display defects such as Mura and the like can be eliminated.

Fig. 2a to 2f are schematic structural diagrams of six types of front-end light source modules according to the embodiments of the present disclosure, where in fig. 2a to 2f, the front-end light source modules include a plurality of light emitting repeating units 10 distributed in an array, each light emitting repeating unit 10 includes one or more LED light sources 101, one or more first wires 102 arranged along a first direction D1, and one or more second wires 103 arranged along a second direction D2, the first direction D1 and the second direction D2 intersect, where a black area covered by the first wires 102 and the second wires 103 represents a light-tight area, that is, the first wires 102 and the second wires 103 may be metal wires or may be black matrixes, where the metal wires may be positive wires and/or negative wires, etc., and the white area in fig. 2a to 2f represents a light-tight area without limitation.

In some exemplary embodiments, the first acute angle is between 3 ° and 20 °.

In some exemplary embodiments, the second acute angle is between 3 ° and 20 °.

As shown in fig. 2a, an included angle α between the first trace 102 and the second direction D2 or a direction opposite to the second direction D2 is 3 °, and an included angle β between the second trace 103 and the first direction D1 or a direction opposite to the first direction D1 is 0 °, that is, the second trace 103 is parallel to the first direction D1. The first wiring 102 between the LED light sources 101 of the n-1 th row and the LED light sources 101 of the n-th row is parallel to the first wiring 102 between the LED light sources 101 of the n-th row and the LED light sources 101 of the n+1 th row. Each first wire 102 is connected to two adjacent LED light sources 101 in the same column, where N is a natural number between 2 and N-1, and N is a total number of rows of LED light sources.

As shown in fig. 2b, the angle α between the first trace 102 and the second direction D2 or the opposite direction of the second direction D2 is 20 °, and the angle β between the second trace 103 and the first direction D1 or the opposite direction of the first direction D1 is 0 °, that is, the second trace 103 is parallel to the first direction D1. The first wiring 102 between the LED light sources 101 of the N-1 th row and the LED light sources 101 of the N-1 th row is parallel to the first wiring 102 between the LED light sources 101 of the N-th row and the LED light sources 101 of the n+1 th row, where N is a natural number between 2 and N-1, and N is the total number of rows of the LED light sources. Each first trace 102 is connected to two adjacent LED light sources 101 in adjacent columns.

As shown in fig. 2c, the angle α between the first trace 102 and the second direction D2 or the opposite direction of the second direction D2 is 0 °, that is, the first trace 102 is parallel to the second direction D2, and the angle β between the second trace 103 and the first direction D1 or the opposite direction of the first direction D1 is 3 °. The second wiring 103 between the M-1 th row of LED light sources 101 and the M-1 th row of LED light sources 101 is symmetrical to the second wiring 103 between the M-th row of LED light sources 101 and the m+1 th row of LED light sources 101 with respect to the line of the M-th row of LED light sources, where M is a natural number between 2 and M-1, and M is the total number of rows of LED light sources.

As shown in fig. 2D, the angle α between the first trace 102 and the second direction D2 or the opposite direction of the second direction D2 is 3 °, and the angle β between the second trace 103 and the first direction D1 or the opposite direction of the first direction D1 is 0 °, i.e. the second trace 103 is parallel to the first direction D1. The first wiring 102 between the LED light sources 101 of the N-1 th row and the LED light sources 101 of the N-1 th row is symmetrical to the first wiring 102 between the LED light sources 101 of the N-th row and the LED light sources 101 of the n+1 th row with respect to the wiring of the LED light sources 101 of the N-th row, where N is a natural number between 2 and N-1, and N is the total number of rows of the LED light sources. Each first trace 102 is connected to two adjacent LED light sources 101 in the same column.

As shown in fig. 2e, the angle α between the first trace 102 and the second direction D2 or the opposite direction of the second direction D2 is 20 °, and the angle β between the second trace 103 and the first direction D1 or the opposite direction of the first direction D1 is 0 °, that is, the second trace 103 is parallel to the first direction D1. The first wiring 102 between the LED light sources 101 of the N-1 th row and the LED light sources 101 of the N-1 th row is symmetrical to the first wiring 102 between the LED light sources 101 of the N-th row and the LED light sources 101 of the n+1 th row with respect to the wiring of the LED light sources 101 of the N-th row, where N is a natural number between 2 and N-1, and N is the total number of rows of the LED light sources. Each first trace 102 is connected to two adjacent LED light sources 101 in adjacent columns.

As shown in fig. 2f, an included angle α between the first trace 102 and the second direction D2 or a direction opposite to the second direction D2 is 3 °, and an included angle β between the second trace 103 and the first direction D1 or a direction opposite to the first direction D1 is 3 °, that is, the first trace 102 and the second trace 103 all adopt a bending design. The first wiring 102 between the LED light sources 101 of the n-1 th row and the LED light sources 101 of the n-th row is parallel to the first wiring 102 between the LED light sources 101 of the n-th row and the LED light sources 101 of the n+1 th row. Each first trace 102 is connected to two adjacent LED light sources 101 in the same column. The second wiring 103 between the M-1 th row of LED light sources 101 and the M-1 th row of LED light sources 101 is symmetrical to the second wiring 103 between the M-th row of LED light sources 101 and the m+1 th row of LED light sources 101 about the line of the M-th row of LED light sources 101, wherein N is a natural number between 2 and N-1, N is a total number of rows of LED light sources, M is a natural number between 2 and M-1, and M is a total number of columns of LED light sources.

The front-end light source module of the embodiment of the disclosure may be configured by bending the first trace 102 and/or the second trace 103, and the transverse bending design and the longitudinal bending design may be adopted at the same time, and the bending design may consider that the size of the light emitting repeating unit is changed or not changed. The bending angle is about 3 ° minimum and about 20 ° maximum considering the electrical condition limitation and the product aperture ratio influence.

In some exemplary embodiments, as shown in fig. 2a to 2f, the plurality of first traces 102 are arranged at equal intervals.

In some exemplary embodiments, as shown in fig. 2a to 2f, the plurality of second traces 103 are arranged at equal intervals.

The front-end light source module according to the embodiment of the disclosure may eliminate display defects such as Mura by uniformly dispersing the plurality of first wires 102 and the plurality of second wires 103 in each light-emitting repeating unit 10.

As shown in fig. 3a, tx and Ty respectively represent the dimensions (i.e., period) of the light emitting repeating unit in the first direction and the second direction, f2x represents the frequency of the light emitting repeating unit in the first direction, f2y represents the frequency of the light emitting repeating unit in the second direction, T represents the dimension of the reflective repeating unit in the first direction or the second direction, the dimension of the reflective repeating unit in the first direction is equal to the dimension in the second direction, f1 represents the frequency of the reflective repeating unit in the first direction or the second direction, and f1 and f2 are closer, the higher the risk of Mura after superposition of the front light source module and the reflective display panel is. As shown in fig. 3b, embodiments of the present disclosure average brightness through an imageCalculating and normalizing the sum of all points in the image and the average brightness difference value: And simulating a Mura simulation result, wherein p and q respectively represent the number of transverse points and the number of longitudinal points in the image, and the Mura quantification is that the fatter V is less than 0.4 and no Mura risk exists. The corresponding Mura quantitative simulation results show that: when the bending angle of the wire is 3 degrees, the maximum value of the fatness V is 0.35, and when the bending angle of the wire is 20 degrees, the minimum value of the fatness V is 0.1.

As shown in fig. 4a and fig. 4b, in the front light source module, the planar size of the light emitting repeating unit is 360um x 360um, the first routing and the second routing are distributed uniformly, the first routing adopts a vertical 3 ° bending design, the second routing is parallel to the first direction, the planar size of the corresponding reflective repeating unit in the reflective LCD display panel is 212um x 212um, and the simulation result shows that Mura quantification is 0.2794V without Mura risk.

The embodiments of the present disclosure do not limit the size of the light emitting repeating unit, which may be determined according to the resolution of the reflective display product. The front-end light source module is applicable to all product resolutions, and each resolution corresponds to different sizes of the light-emitting repeat units and the reflecting repeat units.

In some exemplary embodiments, the width of the first trace 102 is between 3 and 10 microns.

In some exemplary embodiments, the width of the second trace 103 is between 3 and 10 microns.

In this embodiment, the risk of Mura may be reduced or eliminated by reducing the width of the first trace 102 and/or the second trace 103 as much as possible, so that the display effect may be improved.

In some exemplary embodiments, the plurality of light emitting repeat units 10 are distributed in an array by at least one of: translation, mirroring, flipping, rotation.

The front-end light source module of the present disclosure is not limited to the repeated arrangement form of the plurality of light emitting repeated units 10, and the repeated arrangement form includes a plurality of repeated arrangement forms such as translation, mirror image, overturn, rotation, and the like.

As shown in fig. 5a, the embodiment of the disclosure further provides a display device, which includes a reflective display panel 2 and the front light module 1 as described in any one of the foregoing, where the light emitting side of the front light module 1 faces the reflective display panel 2.

In some exemplary embodiments, the reflective display panel 2 includes a plurality of reflective repeating units 20 distributed in an array, the reflective repeating units 20 being configured to reflect light rays or ambient light emitted from the received LED light sources 101.

In some exemplary embodiments, the reflective display panel 2 includes a display substrate 200 and a counter substrate 201 disposed opposite to each other, and a liquid crystal layer 202 disposed between the display substrate 200 and the counter substrate 201. In some examples, the display substrate 200 may be an array substrate, and the counter substrate 201 may be a color film substrate.

In some exemplary embodiments, the front light module 1 is located at a side of the opposite substrate 201 remote from the display substrate 200. Light emitted from the LED light source may be reflected by the reflective repeat unit 20 in the display substrate 200 to realize display. In some examples, the reflective display panel 2 may be a field sequential display panel. The front light may provide three primary colors of light (red, green, and blue) to the display substrate 200. The color value displayed by any one pixel of the display panel in each frame is obtained by respectively displaying three primary colors of light of corresponding brightness values in three field sequences of each frame, the three primary colors of light are provided by three color sub-light sources included in the front light, for example, a first color sub-light source provides a first color light, a second color sub-light source provides a second color light, and a third color sub-light source provides a third color light.

In some exemplary implementations, the reflective display panel 2 of the embodiments of the present disclosure may be a fringe field switching switch (FFS, fringe Field Switching) type or an Advanced super-dimensional field switching (AD-SDS, advanced-Super Dimension Switching) type LCD in which both the pixel electrode and the common electrode are disposed on the display substrate 200 and are disposed in different layers. Or In some exemplary implementations, the reflective display panel 2 of the embodiments of the present disclosure may be an In-plane switching (IPS, in-PLANE SWITCHING) type LCD In which both the pixel electrode and the common electrode are disposed on the display substrate 200 and are disposed on the same layer. Or in some exemplary implementations, the display panel of the embodiments of the present disclosure may be a twisted nematic (TN, twisted Nematic) LCD in which the pixel electrode is disposed on the display substrate 200 and the common electrode is disposed on the opposite substrate.

In some exemplary embodiments, the display substrate 200 may include, in a plane parallel to the display substrate 200: a display area and a non-display area located at the periphery of the display area. The non-display area may include a peripheral area surrounding the periphery of the display area and a binding area located at one side of the display area. In some examples, the display area may be rectangular, the peripheral area may be a rectangular ring surrounding the display area, and the binding area may be rectangular. However, the embodiments of the present disclosure are not limited in this regard.

In some exemplary embodiments, the display region may be provided with a plurality of gate lines and a plurality of data lines, and the plurality of gate lines and the plurality of data lines may cross to define a plurality of pixel regions, and a pixel electrode, a common electrode, and a driving circuit connected to the pixel electrode are disposed in each of the pixel regions. The driving circuit may include at least one thin film transistor. For example, the drain electrode of the thin film transistor may be electrically connected to the pixel electrode, the source electrode may be electrically connected to the data line, and the gate electrode may be electrically connected to the gate line. The scanning signal transmitted by the grid line is used for controlling the on-off of the thin film transistor, and the pixel voltage transmitted by the data line is output to the pixel electrode through the driving circuit. The common electrode is connected to a common voltage line. An electric field for driving the liquid crystal molecules to deflect is formed between the pixel electrode and the common electrode, so that display of specific gray scale is realized.

In some exemplary embodiments, the peripheral region may be provided with a gate driving circuit. For example, the gate driving circuits are disposed in peripheral regions on opposite sides of the display region. The gate driving circuit may provide a scan signal to the gate lines in the display region. The binding area may be provided with a source driving circuit, a driving control chip, and the like. The source driving circuit may supply a pixel voltage to the data line of the display region. The driving control chip may provide control signals to the source driving circuit electrode and the gate driving circuit electrode. However, the embodiments of the present disclosure are not limited in this regard.

In some exemplary embodiments, as shown in fig. 5b, in a plane perpendicular to the display substrate 200, the display area of the display substrate 200 may include: a first substrate 90, an array structure layer and a planarization layer 96 sequentially disposed on the first substrate 90. In some examples, the array structure layer is provided with a plurality of sub-pixels. Any one of the sub-pixels includes at least: the pixel electrode is connected with the driving circuit. However, the embodiments of the present disclosure are not limited in this regard.

In some exemplary embodiments, as shown in fig. 5b, the array structure layer may include, in a plane perpendicular to the display substrate 200: a driving circuit layer, a common electrode layer, a fourth insulating layer 94, a pixel electrode layer, and a fifth insulating layer 95 sequentially disposed on the first substrate 90. The driving circuit layer may include: a semiconductor layer, a first insulating layer 91, a first conductive layer, a second insulating layer 92, a second conductive layer, and a third insulating layer 93, which are sequentially disposed on the first substrate base 90. The semiconductor layer includes at least: an active layer 211a of the thin film transistor 211. The first conductive layer includes at least: a gate electrode 211g of the thin film transistor 211. The second conductive layer includes at least: a source 211s and a drain 211d of the thin film transistor 211. The common electrode layer includes a plurality of common electrodes 213, and the pixel electrode layer includes a plurality of pixel electrodes 212. The pixel electrode 212 is connected to the drain electrode 211d of the thin film transistor 211 located in the second conductive layer. However, the embodiments of the present disclosure are not limited in this regard. For example, the array structure layer may be provided on the counter substrate 201 without providing the common electrode layer. Or the common electrode 213 and the pixel electrode 212 may be disposed in the same layer. In an exemplary embodiment, the pixel electrode 212 may be utilized as the reflective repeating unit 20, or the reflective repeating unit 20 may be disposed at a side of the array structure layer near the first substrate 90.

In some exemplary embodiments, the first, second, third, and fourth insulating layers 91, 92, 93, and 94 may be inorganic insulating layers, and the fifth insulating layer 95 may be an organic insulating layer. For example, the first insulating layer 91, the second insulating layer 92, the third insulating layer 93, and the fourth insulating layer 94 may employ any one or more of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON), and may be a single layer, a multilayer, or a composite layer. The first conductive layer and the second conductive layer may be made of a metal material such as any one or more of silver (Ag), copper (Cu), aluminum (Al), titanium (Ti), and molybdenum (Mo), or an alloy material of the above metals such as aluminum neodymium alloy (AlNd) or molybdenum niobium alloy (MoNb), and may be a single-layer structure, or a multi-layer composite structure such as Ti/Al/Ti, or the like. The pixel electrode layer and the common electrode layer may be made of a transparent conductive material such as Indium Tin Oxide (ITO) or Indium zinc Oxide (IZO, indium Zinc Oxide). The semiconductor layer may employ one or more materials of amorphous indium gallium zinc Oxide (a-IGZO), zinc oxynitride (ZnON), indium Zinc Tin Oxide (IZTO), amorphous silicon (a-Si), polycrystalline silicon (p-Si), hexathiophene, polythiophene, etc., i.e., the present disclosure is applicable to transistors manufactured based on Oxide (Oxide) technology, silicon technology, and organic technology. However, the embodiments of the present disclosure are not limited in this regard.

In some exemplary embodiments, the opposite substrate 201 may include: the color film comprises a second substrate and a color film layer arranged on the second substrate. The color film layer may include a plurality of color film units of different colors and a black matrix located between the color film units. However, the present embodiment is not limited thereto.

In some exemplary embodiments, the display substrate 200 further includes a first alignment layer located at a side of the planarization layer 13 remote from the first substrate 90. The opposite substrate 201 further includes a second alignment layer, which is located at a side of the color film layer away from the second substrate. The first alignment layer and the second alignment layer face the liquid crystal layer 202.

In some exemplary embodiments, a polarizer and a phase retarder may be sequentially disposed on a side of the front light module 1 near the opposite substrate 201. The incident light generated by the LED light source may be polarized by the polarizer, then converted into circularly polarized light by the phase retarder, and then incident on the liquid crystal layer 202. In some examples, the phase retarder may include a 1/2 wave plate and a 1/4 wave plate, where the 1/4 wave plate is closer to the liquid crystal layer 202 than the 1/2 wave plate. However, the present embodiment is not limited thereto.

In some exemplary embodiments, the reflective repeat unit 20 has a first width w1 along the first direction D1, the reflective repeat unit 20 has a second width w2 along the second direction D2, the light emitting repeat unit 10 has a third width w3 along the first direction D1, and the light emitting repeat unit 10 has a fourth width w4 along the second direction D2;

The difference between the first width w1 and the third width w3 is greater than 10 micrometers, and the difference between the second width w2 and the fourth width w4 is greater than 10 micrometers.

the first width w1 is a non-integer multiple of the third width w3, and the second width w2 is a non-integer multiple of the fourth width w 4.

The display device of the embodiment of the present disclosure improves Mura display failure by making the size of the light-emitting repeating unit 10 in the front light differ greatly from that of the reflective repeating unit 20 in the reflective display panel, or be a non-multiple relationship. As shown in fig. 6a, 6b and 6c, the planar size of each light emitting repeating unit in the front light module is 600um by 600um, the simulation area is 3.6mm by 3.6mm, and the viewing Distance (LD) from the simulated human eye to the display panel is 470mm. The size of each reflective repeating unit 20 in the three reflective display panels is in a non-multiple relationship with the planar size of the light-emitting repeating unit 10, which are 139um, 129um and 121um, respectively, and the Mura quantification result V is 0.6520, 0.6759 and 0.4083, respectively, through simulation. That is, when the planar size of each reflective repeating unit in the reflective display panel is 121um, the superposition effect with the front light module is optimal, and the Mura effect is better improved.

In some exemplary embodiments, the spacing between two adjacent reflective repeat units 20 in the first direction D1 is between 6 and 40 microns and the spacing between two adjacent reflective repeat units 20 in the second direction D2 is between 6 and 40 microns.

According to the display device disclosed by the embodiment of the disclosure, the Mura poor display is improved by combining the difficulty of process realization and making the space between adjacent reflection repeating units in the reflection type display panel as small as possible. As shown in fig. 7a, 7b and 7c, the planar size of each light emitting repeating unit 10 in the front light module is 600um by 600um, the planar size of each light reflecting repeating unit 20 in the reflective display panel is 120um by 120um, the simulation area is 3.6mm by 3.6mm, and the viewing Distance (LD) from the simulated human eye to the display panel is 470mm. Through simulation, the distance between the adjacent reflection repeating units 20 in the reflection type display panel is increased, the more serious the Mura defect generated by front light lamination is, the distance between the adjacent reflection repeating units 20 in the reflection type display panel is reduced, and the Mura risk can be reduced. Illustratively, when the spacing between adjacent reflective repeat units 20 in the reflective display panel is 6um, the Mura quantification results in a fatn of 0.3915, with a better improvement in Mura effect.

In some exemplary embodiments, the orthographic projection of the reflective repeat unit on the first substrate may be quadrilateral, pentagonal, hexagonal, or heptagonal. The embodiments of the present disclosure are not limited to the shape of the orthographic projection of the reflective repeat unit structure on the first substrate.

Embodiments of the present disclosure are not limited to the size of the reflective repeat units, which may be determined according to the resolution of the reflective display product. The present disclosure applies to all product resolutions, each corresponding to a different size of the light emitting repeat unit and the reflective repeat unit.

In some exemplary embodiments, the plurality of reflective repeat units are distributed in an array by at least one of: translation, mirroring, flipping, rotation.

The display device of the embodiment of the disclosure is not limited to the repeated arrangement form of the plurality of reflection repeated units, and the repeated arrangement form comprises a plurality of repeated arrangement forms such as translation, mirror image, turnover, rotation and the like.

According to the front light source module and the display device, the design pattern of the front light source module is changed to weaken or eliminate the similar or multiple relation of periodic structure patterns of the front light source module and the reflective LCD display panel, so that display defects such as Mura can be eliminated.

The drawings in the present disclosure relate only to the structures to which the present disclosure relates, and other structures may be referred to in general. Features of embodiments of the present disclosure, i.e., embodiments, may be combined with one another to arrive at a new embodiment without conflict.

It will be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the disclosed embodiments without departing from the spirit and scope of the disclosed embodiments, which are intended to be encompassed within the scope of the appended claims.

Claims

1. The display device is characterized by comprising a reflective display panel and a front light source module, wherein the light emitting side of the front light source module faces the reflective display panel, the front light source module comprises a plurality of light emitting repeated units distributed in an array, the light emitting repeated units comprise one or more Light Emitting Diode (LED) light sources, one or more first wires distributed along a first direction and one or more second wires distributed along a second direction, the first direction and the second direction are intersected, the first wires and the second wires are metal wires or black matrixes, and the metal wires are positive wires and/or negative wires;

the first trace and the second trace satisfy at least one of:

An included angle between the first wiring and the second direction or the opposite direction of the second direction is a first acute angle;

an included angle between the second wiring and the first direction or the opposite direction of the first direction is a second acute angle;

the first acute angle is between 3 ° and 20 °; the second acute angle is between 3 ° and 20 °;

The reflective display panel includes a plurality of reflective repeating units distributed in an array, the reflective repeating units configured to reflect received light rays or ambient light emitted by the LED light sources.

2. The display device according to claim 1, wherein a plurality of the first wirings are arranged at equal intervals; the second wirings are distributed at equal intervals.

3. The display device according to claim 1, wherein the first wiring between the LED light sources of the N-1 th row and the LED light sources of the N-th row is parallel to the first wiring between the LED light sources of the N-th row and the LED light sources of the n+1 th row, where N is a natural number between 2 and N-1, and N is a total number of rows of the LED light sources.

4. The display device according to claim 1, wherein the first trace between the LED light sources of the N-1 th row and the LED light sources of the N-1 th row is symmetrical with respect to a line connecting the LED light sources of the N-1 th row and the LED light sources of the N-1 th row, wherein N is a natural number between 2 and N-1, and N is a total number of rows of the LED light sources.

5. The display device according to claim 1, wherein the second trace between the LED light sources of the M-1 th column and the LED light sources of the M-1 th column is symmetrical with the second trace between the LED light sources of the M-th column and the LED light sources of the m+1 th column about a line connecting the LED light sources of the M-th column, wherein M is a natural number between 2 and M-1, and M is a total number of columns of the LED light sources.

6. The display device according to claim 1, wherein each of the first wirings is connected to two adjacent LED light sources in the same column or each of the first wirings is connected to two adjacent LED light sources in an adjacent column.

7. The display device of claim 1, wherein the first trace has a width between 3 and 10 microns and the second trace has a width between 3 and 10 microns.

8. The display device of claim 1, wherein a plurality of the light emitting repeat units are distributed in an array by at least one of: translation, mirroring, flipping, rotation.

9. The display device according to claim 1, wherein a width of the reflective repeating unit in the first direction is a first width, a width of the reflective repeating unit in the second direction is a second width, a width of the light emitting repeating unit in the first direction is a third width, and a width of the light emitting repeating unit in the second direction is a fourth width;

10. The display device according to claim 1, wherein a width of the reflective repeating unit in the first direction is a first width, a width of the reflective repeating unit in the second direction is a second width, a width of the light emitting repeating unit in the first direction is a third width, and a width of the light emitting repeating unit in the second direction is a fourth width;

11. The display device according to claim 1, wherein a pitch between two of the reflective repeating units adjacent in the first direction is between 6 and 40 micrometers, and a pitch between two of the reflective repeating units adjacent in the second direction is between 6 and 40 micrometers.