Reflective liquid crystal display panel

Abstract

The utility model provides a reflective liquid crystal display panel which comprises an array substrate, an opposite substrate arranged opposite to the array substrate and a liquid crystal layer arranged between the array substrate and the opposite substrate, and the array substrate is arranged on the light emitting side of the opposite substrate; the array substrate comprises a first substrate body, thin film transistors and pixel electrodes which are distributed in an array mode are arranged on the side, close to the opposite substrate, of the first substrate body, and the pixel electrodes are electrically connected with the thin film transistors; the opposed substrate comprises a second substrate, the surface of the second substrate is provided with an uneven diffuse reflection structure and a reflection layer stacked on the diffuse reflection structure, the surface of the reflection layer is of an uneven structure, and the reflection layer can reflect ambient light. According to the reflective liquid crystal display panel, the film thickness of the reflective layer can be prevented from being influenced by the accumulation process of uneven film thickness, the film thickness uniformity of the reflective layer is improved, reflected light is more uniform, and therefore the display effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a reflective liquid crystal display panel. Background Art

[0002] Liquid crystal display (LCD) has become a mainstream product on the market with its excellent performance and mature technology. Liquid crystal display devices are classified according to the type of light source, and can be divided into transmission type, reflection type and transflective type (also called semi-transmissive and semi-reflective type). Liquid crystal display devices mainly include a color film substrate and a thin film transistor (Thin Film Transistor) array substrate arranged opposite to each other, and liquid crystal is filled between the two. Existing reflective liquid crystal display devices and transflective liquid crystal display devices can be used outdoors to make full use of ambient light, that is, to reflect external light to obtain all (reflective) or part of the light source (transflective) required to display images.

[0003] Figure 1 is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the prior art, such as Figure 1 As shown, the existing reflective liquid crystal display panel includes an array substrate 91, an opposing substrate 92 arranged opposite to the array substrate 91, and a liquid crystal layer 93 arranged between the array substrate 91 and the opposing substrate 92. The array substrate 91 is provided with a reflective layer 911 for reflecting external light and an alignment layer (not shown, i.e., a PI film layer) for aligning liquid crystal molecules in the liquid crystal layer 93, and the alignment layer is arranged on the reflective layer 911. The reflective layer 911 includes a flat layer 912 and a metal reflective layer 913 arranged in a stacked manner, the metal reflective layer 913 is arranged on the flat layer 912 in a conformal manner, and the alignment layer is arranged on the metal reflective layer 913.

[0004] In order to achieve the effect of diffuse reflection (scatter the light) to increase the exit angle of the light and thus increase the viewing angle range, the reflective layer 911 is generally set to an uneven structure (the surface of the flat layer 912 is formed into an uneven structure by etching, and the metal reflective layer 913 is an uneven structure that imitates the flat layer 912). This uneven structure will not only affect the alignment of the alignment layer (since the reflective layer 911 is an uneven structure, the alignment layer is also an uneven structure, which affects the alignment of the liquid crystal molecules), but will also affect the deflection of the liquid crystal molecules near this position, thereby affecting the display effect (causing the Domain phenomenon), and at the same time making the film surface of the array substrate 91 uneven, which can easily cause uneven display brightness (causing the mura phenomenon). At the same time, since the reflective layer 911 is the last process on the array substrate 91, and each process before the reflective layer 911 will have more or less uneven film thickness problems (the processes before the reflective layer 911 also include processes for making thin-film transistors, pixel electrodes, etc.), these uneven film thickness problems will gradually accumulate and reach the maximum on the reflective layer 911, resulting in large height differences between the peaks and valleys of the reflective layer 911, thereby further affecting the display effect (further deepening the Domain and mura phenomena). Utility Model Content

[0005] The utility model aims to provide a reflective liquid crystal display panel, which can avoid the accumulation process of uneven film thickness affecting the film thickness of the reflective layer, improve the uniformity of the film thickness of the reflective layer, make the reflected light more uniform, and thus improve the display effect.

[0006] The utility model provides a reflective liquid crystal display panel, comprising an array substrate, an opposing substrate arranged opposite to the array substrate, and a liquid crystal layer arranged between the array substrate and the opposing substrate, wherein the array substrate is arranged on the light-emitting side of the opposing substrate; the array substrate comprises a first base substrate, and thin film transistors and pixel electrodes arranged in an array distribution are arranged on one side of the first base substrate close to the opposing substrate, and the pixel electrodes are electrically connected to the thin film transistors;

[0007] The counter substrate comprises a second base substrate, on the surface of which an uneven diffuse reflection structure and a reflection layer stacked on the diffuse reflection structure are provided, the surface of the reflection layer is an uneven structure, and the reflection layer can reflect ambient light.

[0008] Furthermore, a color resist layer is further disposed on the second base substrate, and the color resist layer is located on a side of the diffuse reflection structure and the reflection layer close to the array substrate.

[0009] Furthermore, the diffuse reflection structure, the reflective layer and the color resist layer are all arranged on a side of the second base substrate close to the array substrate, the color resist layer and the reflective layer are arranged adjacent to each other up and down, and a first protective layer is provided between the color resist layer and the reflective layer.

[0010] Furthermore, a common electrode is provided on a side of the second base substrate close to the array substrate, and the common electrode is located on a side of the color resist layer close to the array substrate.

[0011] Furthermore, the second base substrate includes a substrate, and the diffuse reflection structure, the reflective layer, the color resistance layer and the common electrode are all arranged on the same substrate.

[0012] Furthermore, the second base substrate includes a first substrate and a second substrate that are arranged opposite to each other, and the second substrate is located on a side of the first substrate away from the array substrate; the liquid crystal layer is arranged between the array substrate and the first substrate, the common electrode and the color resist layer are both arranged on a side of the first substrate close to the array substrate, and the diffuse reflection structure and the reflective layer are both arranged on a surface of the second substrate; the first substrate and the second substrate are fixed by OCA adhesive.

[0013] Furthermore, a second protective layer covering the reflective layer is provided on the surface of the second substrate.

[0014] Furthermore, the thin film transistor includes a gate, the gate is arranged on the surface of the first substrate, and the gate is made of molybdenum oxide.

[0015] Furthermore, the diffuse reflection structure is a raised layer disposed on the surface of the second substrate, and the surface of the raised layer close to the reflection layer is an uneven structure;

[0016] Alternatively, the diffuse reflection structure is a plurality of grooves arranged at even intervals formed on the surface of the second substrate by etching;

[0017] Alternatively, the diffuse reflection structure is a plurality of micron particles evenly spaced apart on the surface of the second substrate.

[0018] Furthermore, the reflective layer can also transmit light; the reflective liquid crystal display panel also includes a backlight source, and the backlight source is located on a side of the counter substrate away from the array substrate.

[0019] The reflective liquid crystal display panel provided by the utility model is provided with an uneven diffuse reflection structure on the surface of the second substrate, and the reflective layer is stacked on the diffuse reflection structure, so that the surface of the reflective layer is also an uneven structure, so that the reflective layer can have a good scattering effect on light. At the same time, because the diffuse reflection structure is directly provided on the surface of the second substrate, the uniformity of the diffuse reflection structure itself is better, and the accumulation process of uneven film thickness can be avoided to affect the film thickness of the reflective layer, thereby improving the uniformity of the film thickness of the reflective layer, making the reflected light more uniform, and thus improving the display effect. At the same time, the reflective layer and the diffuse reflection structure can be made into a whole-surface structure, so there is no need for an additional mask etching process, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the prior art.

[0021] Figure 2 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the first embodiment of the utility model.

[0022] Figure 3 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the second embodiment of the present invention.

[0023] Figure 4 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the third embodiment of the present utility model.

[0024] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at position A in the middle.

[0025] Figures 6a to 6e It is a schematic diagram of the manufacturing process of the diffuse reflection structure and the reflection layer in the third embodiment of the utility model.

[0026] Figure 7 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the fourth embodiment of the present utility model.

[0027] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at position B in the middle.

[0028] Figures 9a to 9d It is a schematic diagram of the manufacturing process of the diffuse reflection structure and the reflection layer in the fourth embodiment of the present utility model.

[0029] Fig.10 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in a fifth embodiment of the present utility model.

[0030] Fig.11 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in a sixth embodiment of the present utility model.

[0031] Fig.12 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the seventh embodiment of the present utility model.

[0032] Fig.13 It is a cross-sectional schematic diagram of the seventh embodiment of the present utility model when the first substrate and the second substrate have not been assembled together.

[0033] Fig.14 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the eighth embodiment of the present utility model.

[0034] Fig.15 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the ninth embodiment of the present utility model.

[0035] Fig.16 It is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the tenth embodiment of the present utility model. DETAILED DESCRIPTION

[0036] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0038] The directional words such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the specification and claims of the utility model are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional words should not limit the scope of protection requested by this application.

[0039] First embodiment

[0040] Figure 2 FIG. 2 is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the first embodiment of the present utility model. Figure 2As shown, the first embodiment of the utility model provides a reflective liquid crystal display panel, which uses external ambient light as a light source. The reflective liquid crystal display panel includes an array substrate 1, an opposing substrate 2 arranged opposite to the array substrate 1, and a liquid crystal layer 3 arranged between the array substrate 1 and the opposing substrate 2. The array substrate 1 is arranged on the light-emitting side of the opposing substrate 2 (i.e., the side close to the user), that is, the reflective liquid crystal display panel is a flip-chip design based on a conventional liquid crystal box. The array substrate 1 includes a first base substrate 11, and a thin film transistor 12 (i.e., TFT) and a pixel electrode 13 arranged in an array distribution are provided on the side of the first base substrate 11 close to the opposing substrate 2. The thin film transistor 12 and the pixel electrode 13 are respectively arranged in a plurality of pixel units of the reflective liquid crystal display panel; the pixel electrode 13 is located on the side of the thin film transistor 12 close to the liquid crystal layer 3, and the pixel electrode 13 is electrically connected to the thin film transistor 12.

[0041] The counter substrate 2 includes a second base substrate 21, on the surface of which is provided an uneven diffuse reflection structure 22 and a reflective layer 23 stacked adjacently on the diffuse reflection structure 22. Since the reflective layer 23 and the diffuse reflection structure 22 are arranged in a contour, the surface of the reflective layer 23 is also an uneven structure (specifically, both sides of the reflective layer 23 are uneven structures). The reflective layer 23 can reflect ambient light, and since the surface of the reflective layer 23 is an uneven structure, the reflective layer 23 can scatter light, thereby increasing the light emission angle and viewing angle range.

[0042] A first alignment layer (not shown, i.e., PI film layer) is provided on the side of the first base substrate 11 close to the counter substrate 2, and the first alignment layer is located on the side of the pixel electrode 13 close to the liquid crystal layer 3; a second alignment layer (not shown) is provided on the side of the second base substrate 21 close to the array substrate 1, and the second alignment layer is located on the side of the diffuse reflection structure 22 and the reflection layer 23 close to the liquid crystal layer 3. The first alignment layer and the second alignment layer cooperate to perform initial alignment on the liquid crystal molecules in the liquid crystal layer 3.

[0043] The reflective liquid crystal display panel provided in this embodiment is provided with an uneven diffuse reflection structure 22 on the surface of the second base substrate 21, and a reflective layer 23 is stacked on the diffuse reflection structure 22, so that the surface of the reflective layer 23 is also an uneven structure, so that the reflective layer 23 can have a good scattering effect on light. At the same time, since the diffuse reflection structure 22 is directly provided on the surface of the second base substrate 21, the diffuse reflection structure 22 itself has better uniformity, and the accumulation process of uneven film thickness can avoid the influence of the film thickness of the reflective layer 23, thereby improving the uniformity of the film thickness of the reflective layer 23, making the reflected light more uniform, thereby improving the display effect (avoiding the occurrence of mura phenomenon). At the same time, the reflective layer 23 and the diffuse reflection structure 22 can be made into a whole surface structure, so there is no need for an additional mask etching process (such as Figure 1 As shown, the existing flat layer 912 and metal reflective layer 913 are generally non-solid-surface structures, requiring additional mask etching processes), thereby saving costs.

[0044] like Figure 2 As shown, as an embodiment, the diffuse reflection structure 22 is a convex layer 221 disposed on the surface of the second base substrate 21, and the surface of the convex layer 221 close to the reflective layer 23 is an uneven structure. The material of the convex layer 221 can be OC (organic resin material) or the like, and the surface of the convex layer 221 close to the reflective layer 23 is etched so that the surface of the convex layer 221 forms an uneven structure.

[0045] like Figure 2 As shown, as an implementation mode, the reflective layer 23 is a metal reflective layer (ie, the reflective layer 23 is made of metal), which only reflects light (ie, the reflective layer 23 is only used to reflect ambient light) but cannot transmit light.

[0046] like Figure 2 As shown, as an implementation mode, a color resist layer 24 is further provided on the second base substrate 21, and the color resist layer 24 is located on the side of the diffuse reflection structure 22 and the reflection layer 23 close to the array substrate 1. The color resist layer 24 includes a plurality of red color resist blocks, a plurality of green color resist blocks, and a plurality of blue color resist blocks, which are respectively arranged in a plurality of pixel units to form pixel units of three colors of red (R), green (G), and blue (B), respectively, so as to realize the function of color display.

[0047] Specifically, in this embodiment, the color resist layer 24 is disposed on the second base substrate 21, thereby reducing the distance between the color resist layer 24 and the reflective layer 23. The smaller the distance between the color resist layer 24 and the reflective layer 23, the higher the utilization rate of light, which is beneficial to improving the display brightness (specifically, due to the existence of the color resist layer 24, when ambient light enters a pixel unit of a certain color, it must be emitted from the pixel unit of the same color to be effectively utilized, while the light emitted from the pixel unit of other colors will be absorbed by the color resist of different colors and cannot be emitted. When When ambient light enters a pixel unit of a certain color, if the distance between the color-resistance layer 24 and the reflective layer 23 is larger, the ambient light is more likely to be reflected by the reflective layer 23 to the adjacent pixel units of other colors, thereby preventing the light from being emitted; and if the distance between the color-resistance layer 24 and the reflective layer 23 is smaller, the ambient light is more likely to be directly reflected from the incident pixel unit, thereby improving the utilization rate of the light. When the color-resistance layer 24 and the reflective layer 23 are arranged adjacent to each other up and down, that is, when the distance between the color-resistance layer 24 and the reflective layer 23 is 0, the utilization rate of the light is the highest at this time). Of course, in other embodiments, the color-resistance layer 24 can also be arranged on the array substrate 1.

[0048] like Figure 2 As shown in FIG. 1 , as an implementation mode, the diffuse reflection structure 22, the reflection layer 23 and the color resistance layer 24 are all arranged on the second base substrate 21 on the side close to the array substrate 1, and the color resistance layer 24 and the reflection layer 23 are arranged adjacent to each other up and down. At this time, the reflective liquid crystal display panel has the maximum utilization rate of light. Fig.10 and Fig.11 As shown, in other embodiments, the diffuse reflection structure 22 and the reflection layer 23 may also be arranged on a side of the second base substrate 21 away from the array substrate 1. Fig.11 As shown, in other embodiments, the color resist layer 24 may also be disposed on a side of the second base substrate 21 away from the array substrate 1 .

[0049] like Figure 2 As shown, as an embodiment, a common electrode 25 for cooperating with the pixel electrode 13 is provided on a side of the second base substrate 21 close to the array substrate 1, and the common electrode 25 is located on a side of the color resist layer 24 close to the array substrate 1, and the common electrode 25 and the color resist layer 24 are stacked up and down adjacently. The second alignment layer is provided on a side of the common electrode 25 close to the array substrate 1, and the second alignment layer and the common electrode 25 are stacked up and down adjacently.

[0050] Specifically, since a color resist layer 24 and a common electrode 25 are provided between the reflective layer 23 and the liquid crystal layer 3 in the present embodiment, the reflective layer 23 is not arranged close to the liquid crystal layer 3, and thus the flatness of the upper surface of the opposing substrate 2 can be improved, and the second alignment layer can be staggered with the reflective layer 23, that is, the second alignment layer does not need to be arranged on the reflective layer 23, so that the surface of the second alignment layer remains flat, thereby avoiding the second alignment layer surface from affecting its alignment function and the deflection of the liquid crystal molecules, thereby avoiding affecting the display effect of the reflective liquid crystal display panel (avoiding the occurrence of Domain phenomenon and mura phenomenon).

[0051] like Figure 2 As shown, as an implementation manner, a spacer (PS) is further provided on a side of the second base substrate 21 close to the array substrate 1 , and the spacer is located between the first base substrate 11 and the second base substrate 21 .

[0052] like Figure 2 As shown in FIG. 1 , as an embodiment, the second base substrate 21 is a substrate, and the diffuse reflection structure 22, the reflection layer 23, the color resistance layer 24 and the common electrode 25 are all arranged on the same substrate. Fig.12 As shown, in other embodiments, the second base substrate 21 may also be two substrates, the diffuse reflection structure 22 and the reflective layer 23 are arranged on one of the substrates, and the color resist layer 24 and the common electrode 25 are arranged on the other substrate.

[0053] like Figure 2 As shown, as an implementation mode, the thin film transistor 12 specifically includes a gate 121, an active layer 123, a source 124 and a drain 125, the gate 121 is connected to a scan line (not shown), the source 124 and the drain 125 are respectively connected to the active layer 123, and the source 124 is connected to a data line (not shown). A gate insulating layer 122 is provided between the gate 121 and the active layer 123, the source 124 and the drain 125, and a first insulating layer 126 is provided on the gate insulating layer 122, and the first insulating layer 126 covers the source 124, the drain 125 and the active layer 123. The pixel electrode 13 is provided on the first insulating layer 126, and the pixel electrode 13 is connected to the drain 125 through a via hole (not numbered in the figure) on the first insulating layer 126. The specific functions and mutual coordination relationship of the thin film transistor 12, the pixel electrode 13 and the common electrode 25 can be referred to the prior art, and will not be repeated here.

[0054] like Figure 2As shown, as an embodiment, the gate 121 is arranged on the surface of the first base substrate 11, and the gate 121 is located on the side of the active layer 123 away from the liquid crystal layer 3. The gate 121 is a molybdenum oxide layer, that is, the gate 121 is made of molybdenum oxide. Since the reflective liquid crystal display panel in this embodiment adopts a flip-chip design, the external ambient light can directly irradiate the thin film transistor 12. On the one hand, the thin film transistor 12 is easily caused to fail under the irradiation of ambient light. On the other hand, since most of the thin film transistor 12 is made of metal lines, the metal lines can reflect the incident light, thereby affecting the normal display; by setting the gate 121 to be made of molybdenum oxide (other lines arranged in the same layer as the gate 121 are also made of molybdenum oxide), molybdenum oxide not only has good electrical conductivity, but also has good light shielding and light absorption effects, so the gate 121 can block and absorb ambient light, thereby reducing or avoiding ambient light directly irradiating the thin film transistor 12, thereby avoiding the failure of the thin film transistor 12 and metal reflection, and no additional black matrix (BM) is required, saving process costs.

[0055] As an implementation mode, the first substrate 11 and the second substrate 21 can be made of transparent glass, transparent plastic and the like (of course, in other embodiments, the second substrate 21 can also be made of opaque material). The pixel electrode 13 and the common electrode 25 can be made of transparent conductive material, such as indium tin oxide (ITO), indium zinc oxide (IZO) or aluminum zinc oxide. The source electrode 124, the drain electrode 125 and the reflective layer 23 can be made of metals or alloys such as Cr, W, Ti, Ta, Mo, Al, Cu, or a composite film composed of multiple metal films. The active layer 123 can be made of amorphous silicon (a-si), polycrystalline silicon (p-si), metal oxide semiconductor (such as IGZO, ITZO) and the like. The gate insulating layer 122 can be made of silicon nitride, and the first insulating layer 126 can be made of silicon oxynitride, silicon oxide or silicon nitride and the like.

[0056] The reflective liquid crystal display panel provided in this embodiment is provided with an uneven diffuse reflection structure 22 on the surface of the second base substrate 21, and the reflective layer 23 is stacked on the diffuse reflection structure 22, so that the surface of the reflective layer 23 is also an uneven structure, so that the reflective layer 23 can have a good scattering effect on the light. At the same time, since the diffuse reflection structure 22 is directly provided on the surface of the second base substrate 21, the diffuse reflection structure 22 itself has better uniformity, and the accumulation process of uneven film thickness can be avoided to affect the film thickness of the reflective layer 23, thereby improving the uniformity of the film thickness of the reflective layer 23, making the reflected light more uniform, thereby improving the display effect (avoiding the occurrence of mura phenomenon). At the same time, the reflective layer 23 and the diffuse reflection structure 22 can be made into a whole surface structure, so there is no need for an additional mask etching process, thereby saving costs.

[0057] Second embodiment

[0058] Figure 3 FIG. 2 is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the second embodiment of the present invention. Figure 3 As shown, the reflective liquid crystal display panel provided by the second embodiment of the utility model is basically the same as the first embodiment, except that: a first protective layer 26 is provided between the color resist layer 24 and the reflective layer 23. On the one hand, since the reflective layer 23 is generally made of metal and the color resist layer 24 is generally made of organic resin, the color resist layer 24 is separated from the reflective layer 23 by providing the first protective layer 26, thereby avoiding problems such as metal corrosion caused by direct contact between the two. On the other hand, the first protective layer 26 can play a flat role, thereby improving the uniformity of the film thickness of the color resist layer 24 and subsequent film layers. The material of the first protective layer 26 can be silicon oxynitride, silicon oxide or silicon nitride.

[0059] The other structures of this embodiment are the same or similar to those of the first embodiment and are not described herein in detail.

[0060] Third embodiment

[0061] Figure 4 This is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the third embodiment of the present utility model. Figure 5 for Figure 4 The enlarged schematic diagram of the structure at position A in the figure. Figure 4 and Figure 5 As shown, the reflective liquid crystal display panel provided in the third embodiment of the present invention is basically the same as that in the first embodiment, except that the formation method and structure of the diffuse reflection structure 22 are different.

[0062] Specifically, in this embodiment, the diffuse reflection structure 22 is a plurality of grooves 222 evenly spaced and formed on the surface of the second base substrate 21 by etching, and convex portions 223 are formed between adjacent grooves 222. Thus, the reflective layer 23 forms a concave structure at positions corresponding to the grooves 222, and forms a convex structure at positions corresponding to the convex portions 223, so that the surface of the reflective layer 23 forms an uneven structure.

[0063] Figures 6a to 6e Schematic diagram of the manufacturing process of the diffuse reflection structure and the reflection layer in the third embodiment of the utility model. Figures 6a to 6e As shown, as an implementation manner, the steps for manufacturing the diffuse reflection structure 22 and the reflection layer 23 on the second base substrate 21 may be:

[0064] (1) Figure 6a and Figure 6bAs shown, a mask plate 6 is attached to the second base substrate 21, and a plurality of through holes 61 distributed in an array are provided on the mask plate 6. The mask plate 6 is made of a material resistant to acid and alkali corrosion.

[0065] (2) Figure 6c As shown, under the masking effect of the mask plate 6, the surface of the second base substrate 21 is etched using hydrofluoric acid (the second base substrate 21 is made of glass), so that the surface of the second base substrate 21 is etched to form a groove 222 at the position corresponding to the through hole 61 on the mask plate 6, while other positions are not etched because they are covered by the mask plate 6, forming a protrusion 223.

[0066] (3) Figure 6d As shown, the mask plate 6 is peeled off from the second base substrate 21, so as to obtain the second base substrate 21 with the diffuse reflection structure 22 formed on the surface.

[0067] (4) Figure 6e As shown, a reflective layer 23 is disposed on the surface of the second base substrate 21 having the diffuse reflection structure 22 , and the reflective layer 23 is disposed in the same shape as the diffuse reflection structure 22 , so that the reflective layer 23 has an uneven structure.

[0068] The diffuse reflection structure 22 manufactured in this way has better uniformity, improves the uniformity of the film thickness of the reflection layer 23, makes the reflected light more uniform, and thus improves the display effect.

[0069] The other structures of this embodiment are the same or similar to those of the first embodiment and are not described herein in detail.

[0070] Fourth embodiment

[0071] Figure 7 This is a cross-sectional schematic diagram of a reflective liquid crystal display panel in a fourth embodiment of the present invention. Figure 8 for Figure 7 The enlarged schematic diagram of the structure at position B in the figure. Figure 7 and Figure 8 As shown, the reflective liquid crystal display panel provided by the fourth embodiment of the present invention is basically the same as that of the first embodiment, except that the formation method and structure of the diffuse reflection structure 22 are different.

[0072] Specifically, in this embodiment, the diffuse reflection structure 22 is a plurality of micron particles 224 evenly spaced on the surface of the second base substrate 21 (i.e., the diffuse reflection structure 22 is formed by evenly coating the micron particles 224 on the surface of the second base substrate 21), and the reflective layer 23 forms a convex structure corresponding to the position of the micron particles 224, and the reflective layer 23 forms a concave structure corresponding to the position between adjacent micron particles 224, so that the surface of the reflective layer 23 forms an uneven structure.

[0073] In this embodiment, the diameter of the micron particles 224 is 2 microns to 4 microns, so that the reflective layer 23 has a good scattering effect. The micron particles 224 can be made of resin material.

[0074] like Figure 7 and Figure 8 As shown, as an embodiment, an intermediate protective layer 28 covering the micron particles 224 is further provided on the surface of the second base substrate 21, and the intermediate protective layer 28 is located between the micron particles 224 and the reflective layer 23. On the one hand, the intermediate protective layer 28 can protect the micron particles 224, and on the other hand, since the micron particles 224 themselves do not have adhesive properties, in order to prevent the micron particles 224 from falling off from the second base substrate 21, a layer of intermediate protective layer 28 is provided to fix the micron particles 224.

[0075] As an implementation manner, the material of the intermediate protection layer 28 can be OC (organic resin material), waterproof ink, etc.

[0076] Figures 9a to 9d Schematic diagram of the manufacturing process of the diffuse reflection structure and the reflection layer in the fourth embodiment of the utility model. Figures 9a to 9d As shown, as an implementation manner, the steps for manufacturing the diffuse reflection structure 22 and the reflection layer 23 on the second base substrate 21 may be:

[0077] (1) Figure 9a As shown, the surface of the second base substrate 21 is cleaned.

[0078] (2) Figure 9b As shown, micron particles 224 are uniformly sprayed on the surface of the second base substrate 21 .

[0079] (3) Fig.9c As shown, an intermediate protective layer 28 covering the micron particles 224 is coated on the surface of the second base substrate 21 , and the intermediate protective layer 28 is arranged in the same shape as the micron particles 224 (ie, the intermediate protective layer 28 has an uneven structure).

[0080] (4) Figure 9d As shown, a reflective layer 23 is disposed on the surface of the second base substrate 21 , and the reflective layer 23 covers the intermediate protective layer 28 . The reflective layer 23 and the intermediate protective layer 28 are configured in a contour, so that the reflective layer 23 has an uneven structure.

[0081] The diffuse reflection structure 22 manufactured in this way has better uniformity, improves the uniformity of the film thickness of the reflection layer 23, makes the reflected light more uniform, and thus improves the display effect.

[0082] The other structures of this embodiment are the same or similar to those of the first embodiment and are not described herein in detail.

[0083] Fifth embodiment

[0084] Fig.10 FIG. 2 is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the fifth embodiment of the present invention. Fig.10 As shown, the reflective liquid crystal display panel provided in the fifth embodiment of the present invention is substantially the same as that in the first embodiment, except that the diffuse reflection structure 22 and the reflective layer 23 are disposed at different positions.

[0085] Specifically, in this embodiment, the diffuse reflection structure 22 and the reflective layer 23 are both disposed on the side of the second base substrate 21 away from the array substrate 1. Since the diffuse reflection structure 22 and the reflective layer 23 are disposed on the back side of the second base substrate 21, it is possible to avoid affecting the uniformity of the film thickness of the color resist layer 24 and the common electrode 25, thereby further improving the flatness of the upper surface of the counter substrate 2.

[0086] The other structures of this embodiment are the same or similar to those of the first embodiment and are not described herein in detail.

[0087] Sixth embodiment

[0088] Fig.11 FIG. 2 is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the sixth embodiment of the present utility model. Fig.11 As shown, the reflective liquid crystal display panel provided by the sixth embodiment of the present invention is substantially the same as that of the fifth embodiment, except that the color resist layer 24 is disposed at a different position.

[0089] Specifically, in this embodiment, the color resist layer 24 is also disposed on the side of the second base substrate 21 away from the array substrate 1, that is, the lower surface of the second base substrate 21 is sequentially provided with the color resist layer 24, the diffuse reflection structure 22 and the reflective layer 23. Such a configuration can reduce the distance between the color resist layer 24 and the reflective layer 23, and improve the utilization rate of light.

[0090] The other structures of this embodiment are the same as or similar to those of the fifth embodiment and are not described in detail here.

[0091] Seventh embodiment

[0092] Fig.12 This is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the seventh embodiment of the present utility model. Fig.13 This is a cross-sectional schematic diagram of the seventh embodiment of the utility model when the first substrate and the second substrate have not been assembled together. Fig.12 and Fig.13 As shown, the reflective liquid crystal display panel provided by the seventh embodiment of the utility model is basically the same as the first embodiment, except that the structure of the second base substrate 21 is different, and the arrangement positions of the diffuse reflection structure 22, the reflective layer 23, the color resist layer 24 and the common electrode 25 are different.

[0093] Specifically, in this embodiment, the second base substrate 21 is two substrates, and the second base substrate 21 includes a first substrate 211 and a second substrate 212 that are arranged opposite to each other, and the second substrate 212 is located on a side of the first substrate 211 away from the array substrate 1. The liquid crystal layer 3 is arranged between the array substrate 1 and the first substrate 211, the common electrode 25 and the color resist layer 24 are both arranged on a side of the first substrate 211 close to the array substrate 1, and the diffuse reflection structure 22 and the reflection layer 23 are both arranged on the surface of the second substrate 212. The first substrate 211 and the second substrate 212 are bonded and fixed by OCA glue 5.

[0094] Specifically, since the diffuse reflection structure 22, the reflection layer 23, the color resistance layer 24 and the common electrode 25 in this embodiment are respectively arranged on two substrates, that is, the second substrate 212 can be used as a separate reflection box, and the first substrate 211 can form a conventional transmissive liquid crystal box (such as Fig.13 As shown, when the first substrate 211 and the second substrate 212 are not assembled together, the first substrate 211 can form a conventional transmissive liquid crystal box with the array substrate 1 to realize a normal transmissive display function; when reflective display is required, the second substrate 212 and the first substrate 211 only need to be bonded together by OCA glue 5 and then flipped to obtain a reflective liquid crystal display panel. That is, the reflective liquid crystal display panel only needs to add a reflective box on the basis of a conventional transmissive liquid crystal box, and a reflective box of one structure can match the requirements of transmissive liquid crystal boxes of different sizes. When producing reflective liquid crystal display panels of different sizes, there is no need to redesign the mask of the reflective box (the mask is a light mask structure of the diffuse reflection structure 22), thereby saving costs.

[0095] like Fig.12 and Fig.13 As shown, in this embodiment, a second protective layer 27 covering the reflective layer 23 is further provided on the surface of the second substrate 212. The second protective layer 27 can protect the reflective layer 23 to prevent the reflective layer 23 from being oxidized or damaged when the second substrate 212 is used as a separate reflective box. The material of the second protective layer 27 can be silicon oxynitride, silicon oxide, or silicon nitride.

[0096] like Fig.12 As shown, in this embodiment, the diffuse reflection structure 22 , the reflection layer 23 and the second protection layer 27 are all arranged on the second substrate 212 on a side close to the first substrate 211 , and the OCA glue 5 is bonded between the second protection layer 27 and the first substrate 211 .

[0097] The other structures of this embodiment are the same or similar to those of the first embodiment and are not described herein in detail.

[0098] Eighth embodiment

[0099] Fig.14 FIG. 2 is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the eighth embodiment of the present utility model. Fig.14 As shown, the reflective liquid crystal display panel provided by the eighth embodiment of the present invention is basically the same as the seventh embodiment, except that the diffuse reflection structure 22, the reflective layer 23 and the second protective layer 27 are arranged at different positions.

[0100] Specifically, in this embodiment, the diffuse reflection structure 22 , the reflection layer 23 and the second protection layer 27 are all disposed on a side of the second substrate 212 away from the first substrate 211 , and the OCA glue 5 is bonded between the first substrate 211 and the second substrate 212 .

[0101] The other structures of this embodiment are the same as or similar to those of the seventh embodiment and are not described herein in detail.

[0102] Ninth embodiment

[0103] Fig.15 FIG. 2 is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the ninth embodiment of the present utility model. Fig.15 As shown, the reflective liquid crystal display panel provided by the ninth embodiment of the present invention is basically the same as the first embodiment, except that the structure of the reflective layer 23 is different and the display function is different.

[0104] Specifically, in this embodiment, the reflective layer 23 can also transmit light (that is, the reflective layer 23 can both reflect and transmit light). The reflective liquid crystal display panel also includes a backlight source 4, which is located on a side of the opposing substrate 2 away from the array substrate 1. At this time, the second base substrate 21 needs to be made of a transparent material, such as transparent glass, transparent plastic, etc.

[0105] Specifically, the reflective liquid crystal display panel has a reflective display function and a transmissive display function (that is, the reflective liquid crystal display panel is actually a transflective liquid crystal display panel). Since the reflective layer 23 has both light reflection and light transmission functions, when the external ambient light is sufficient, the external ambient light can be used as a light source, and the external ambient light is reflected by the reflective layer 23 for reflective display (at this time, the backlight source 4 does not need to be powered on); when the external ambient light is insufficient, the backlight source 4 is powered on, and the light emitted by the backlight source 4 passes through the reflective layer 23 for transmissive display, thereby compensating for the dependence of the reflective display on the ambient light.

[0106] In this embodiment, the diffuse reflection structure 22 and the reflection layer 23 are both arranged on a side of the second base substrate 21 close to the array substrate 1 .

[0107] As an implementation manner, the backlight source 4 may be an edge-type backlight source or a direct-type backlight source.

[0108] The other structures of this embodiment are the same or similar to those of the first embodiment and are not described herein in detail.

[0109] Tenth embodiment

[0110] Fig.16 FIG. 1 is a cross-sectional schematic diagram of a reflective liquid crystal display panel in the tenth embodiment of the present utility model. Fig.16 As shown, the reflective liquid crystal display panel provided by the tenth embodiment of the present invention is basically the same as the ninth embodiment, except that the diffuse reflection structure 22 and the reflective layer 23 are arranged at different positions.

[0111] Specifically, in this embodiment, the diffuse reflection structure 22 and the reflection layer 23 are both arranged on a side of the second base substrate 21 away from the array substrate 1 .

[0112] The other structures of this embodiment are the same as or similar to those of the ninth embodiment and are not described in detail here.

[0113] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A reflective liquid crystal display panel, comprising an array substrate (1), an opposing substrate (2) arranged opposite to the array substrate (1), and a liquid crystal layer (3) arranged between the array substrate (1) and the opposing substrate (2), characterized in that: The array substrate (1) is arranged on the light-emitting side of the counter substrate (2); the array substrate (1) comprises a first base substrate (11), and thin-film transistors (12) and pixel electrodes (13) arranged in an array distribution are provided on one side of the first base substrate (11) close to the counter substrate (2), and the pixel electrodes (13) are electrically connected to the thin-film transistors (12); The opposing substrate (2) comprises a second base substrate (21), the surface of the second base substrate (21) being provided with an uneven diffuse reflection structure (22) and a reflection layer (23) stacked on the diffuse reflection structure (22), the surface of the reflection layer (23) being an uneven structure, and the reflection layer (23) being capable of reflecting ambient light.

2. The reflective liquid crystal display panel according to claim 1, wherein: A color resist layer (24) is also provided on the second base substrate (21), and the color resist layer (24) is located on a side of the diffuse reflection structure (22) and the reflection layer (23) close to the array substrate (1).

3. The reflective liquid crystal display panel according to claim 2, wherein: The diffuse reflection structure (22), the reflective layer (23) and the color resistance layer (24) are all arranged on a side of the second base substrate (21) close to the array substrate (1); the color resistance layer (24) and the reflective layer (23) are arranged adjacent to each other up and down; and a first protective layer (26) is provided between the color resistance layer (24) and the reflective layer (23).

4. The reflective liquid crystal display panel according to claim 2, wherein: A common electrode (25) is provided on a side of the second base substrate (21) close to the array substrate (1); the common electrode (25) is located on a side of the color resist layer (24) close to the array substrate (1).

5. The reflective liquid crystal display panel according to claim 4, wherein: The second base substrate (21) comprises a substrate, and the diffuse reflection structure (22), the reflection layer (23), the color resistance layer (24) and the common electrode (25) are all arranged on the same substrate.

6. The reflective liquid crystal display panel according to claim 4, wherein: The second base substrate (21) comprises a first substrate (211) and a second substrate (212) which are arranged opposite to each other, the second substrate (212) being located on a side of the first substrate (211) away from the array substrate (1); the liquid crystal layer (3) is arranged between the array substrate (1) and the first substrate (211); the common electrode (25) and the color resistance layer (24) are both arranged on a side of the first substrate (211) close to the array substrate (1); the diffuse reflection structure (22) and the reflection layer (23) are both arranged on the surface of the second substrate (212); the first substrate (211) and the second substrate (212) are bonded and fixed by OCA glue (5).

7. The reflective liquid crystal display panel according to claim 6, wherein: A second protective layer (27) covering the reflective layer (23) is also provided on the surface of the second substrate (212).

8. The reflective liquid crystal display panel according to claim 1, wherein: The thin film transistor (12) comprises a gate (121), wherein the gate (121) is arranged on the surface of the first substrate (11), and the gate (121) is made of molybdenum oxide.

9. The reflective liquid crystal display panel according to any one of claims 1 to 8, wherein: The diffuse reflection structure (22) is a raised layer (221) arranged on the surface of the second substrate (21), and the surface of the raised layer (221) on a side close to the reflection layer (23) is an uneven structure; Alternatively, the diffuse reflection structure (22) is a plurality of evenly spaced grooves (222) formed on the surface of the second substrate (21) by etching; Alternatively, the diffuse reflection structure (22) is a plurality of micron particles (224) evenly spaced apart on the surface of the second substrate (21).

10. The reflective liquid crystal display panel according to any one of claims 1 to 8, wherein: The reflective layer (23) is also capable of transmitting light; the reflective liquid crystal display panel further comprises a backlight source (4), and the backlight source (4) is located on a side of the opposing substrate (2) away from the array substrate (1).

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