Reflective 3D display module, display device and control method

Abstract

The present invention discloses a reflective 3D display module, a display device and a control method, wherein the 3D display module comprises: a display panel and a light control panel arranged on a first side of the display panel, wherein the light control panel comprises: a reflective layer and a liquid crystal grating arranged between the reflective layer and the display panel. The reflective layer is configured to reflect light incident from the second side of the display panel, the liquid crystal grating is divided into a first area and a second area, the positions of the first area and the second area are configured to be adjusted according to the position of the human eye, the reflected light corresponding to the first area is emitted through the display panel, and the reflected light corresponding to the second area is blocked by the display panel, so that the light emitted through the display panel enters the left and right eyes respectively, forming a 3D display screen, and realizing the reflective naked-eye 3D display effect of human eye tracking.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a reflective 3D display module, a display device and a control method. Background Art

[0002] With the development of display technology, 3D display products have been favored by the majority of users, and more and more display products have 3D display functions. At present, most display products with 3D display functions are transmissive liquid crystal display panels that need to be equipped with backlight modules.

[0003] Reflective display products use ambient light to display images. They have the advantages of low power consumption and close to nature. They are used in more and more display fields, especially outdoor display fields, such as electronic newspapers, e-books, and reflective wearable products. Therefore, realizing reflective 3D display has become an important development direction. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide a reflective 3D display module, a display device and a control method that overcome the above problems or at least partially solve the above problems.

[0005] In a first aspect, an embodiment of the present invention provides a reflective 3D display module, comprising: a display panel and a light control panel disposed on a first side of the display panel, wherein the light control panel comprises:

[0006] a reflective layer configured to reflect light incident from a second side of the display panel, wherein the second side is a side opposite to the first side; and

[0007] A liquid crystal grating is arranged between the reflective layer and the display panel, the liquid crystal grating is divided into a first area and a second area, the positions of the first area and the second area are configured to be adjusted according to the position of the human eye, the reflected light corresponding to the first area is emitted through the display panel, and the reflected light corresponding to the second area is blocked by the display panel, so that the light emitted through the display panel enters the left and right eyes respectively, forming a 3D display picture.

[0008] Furthermore, the liquid crystal grating comprises: a first electrode layer, a first liquid crystal layer and a second electrode layer which are stacked.

[0009] The first electrode layer includes: a plurality of electrode units, each electrode unit corresponding to a liquid crystal region in the first liquid crystal layer;

[0010] The plurality of electrode units are insulated from each other, and each of the electrode units has an independent voltage control terminal, so as to adjust the arrangement state of the liquid crystal molecules in the corresponding liquid crystal region by controlling the driving state of each electrode unit respectively, thereby forming the first region and the second region.

[0011] Furthermore, each of the electrode units includes a plurality of electrode sub-units, the plurality of electrode sub-units are insulated from each other, and each of the electrode sub-units has an independent voltage control terminal so as to adjust the positions of the first area and the second area according to the position of a human eye.

[0012] Furthermore, the multiple electrode sub-units are located in the same layer.

[0013] Furthermore, the first electrode layer includes a plurality of sub-electrode layers, a first insulating layer is arranged between two adjacent sub-electrode layers, and the plurality of electrode sub-units are distributed in the plurality of sub-electrode layers.

[0014] Furthermore, the number of layers of the sub-electrode layers is two, and the multiple electrode sub-units are distributed in an alternating manner in the two sub-electrode layers.

[0015] Furthermore, two adjacent electrode sub-units are distributed in different sub-electrode layers, and the orthographic projections of the two adjacent electrode sub-units on the first insulating layer partially overlap.

[0016] Furthermore, the second electrode layer and the reflective layer are the same layer, or the second electrode layer and the reflective layer are different layers, and a second insulating layer is provided between the second electrode layer and the reflective layer.

[0017] Furthermore, the display panel includes: a first polarizer, a liquid crystal display component, a second polarizer and a phase retardation layer which are stacked, wherein the transmission axes of the first polarizer and the second polarizer are perpendicular, and the reflected light from the first area passes through the phase retardation layer and then passes through the second polarizer, enters the liquid crystal display component, and is emitted from the first polarizer, and the reflected light from the second area passes through the phase retardation layer and then is blocked by the second polarizer;

[0018] The liquid crystal display component includes a base substrate and a plurality of pixel units arranged on the base substrate, each pixel unit includes a plurality of sub-pixels, the electrode unit is arranged corresponding to the pixel unit, and the orthographic projection of the electrode unit and the corresponding pixel unit on the base substrate at least partially overlaps.

[0019] Furthermore, the phase delay layer includes: a half wave plate and a quarter wave plate, and the half wave plate and the quarter wave plate are stacked between the second polarizer and the liquid crystal grating, and the reflected light emitted from the liquid crystal grating passes through the quarter wave plate and the half wave plate in sequence and is incident on the second polarizer.

[0020] In a second aspect, an embodiment of the present invention provides a display device, comprising: an eye tracking module, and the reflective 3D display module provided in the first aspect above,

[0021] The human eye tracking module is configured to obtain the human eye position;

[0022] The reflective 3D display module is configured to adjust the positions of the first area and the second area in the liquid crystal grating according to the position of the human eye, so that the light emitted through the display panel enters the left and right eyes respectively to form a 3D display picture.

[0023] In a third aspect, an embodiment of the present invention provides a display control method, which is applied to the display device provided in the second aspect, and the method includes:

[0024] Obtaining human eye position information;

[0025] Based on the eye position information, determining image positions corresponding to the left and right eyes respectively;

[0026] Based on the image position, the positions of the first area and the second area in the liquid crystal grating are adjusted so that the light emitted through the display panel enters the left and right eyes respectively to form a 3D display picture.

[0027] The technical solution provided in the embodiments of the present invention has at least the following technical effects or advantages:

[0028] The reflective 3D display module, display device and control method provided by the embodiments of the present invention are configured such that a liquid crystal grating is arranged between a display panel and a reflective layer, the liquid crystal grating is divided into a first area and a second area, and the positions of the first area and the second area are configured to be adjusted according to the position of the human eye, the reflected light corresponding to the first area is emitted through the display component, and the reflected light corresponding to the second area is blocked by the display panel, so that the light emitted through the display panel enters the left and right eyes respectively, forming a 3D display picture, thereby realizing a reflective naked-eye 3D display effect of human eye tracking.

[0029] The above description is only an overview of the technical solution provided by the embodiment of the present invention. In order to more clearly understand the technical means of the embodiment of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present invention more obvious and easy to understand, the specific implementation method of the embodiment of the present invention is specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0031] Figure 1 Schematic diagram of the structure of a reflective 3D display module in an embodiment of the present invention;

[0032] Figure 2 Schematic diagram of the structure of the first electrode layer in an embodiment of the present invention Figure 1 ;

[0033] Figure 3 is a schematic diagram of the corresponding arrangement of each electrode unit and pixel unit in an embodiment of the present invention;

[0034] Figure 4 Schematic diagram of light transmission of a reflective 3D display module in an embodiment of the present invention;

[0035] Figure 5 Schematic diagram of the structure of the electrode unit in an embodiment of the present invention;

[0036] Figure 6 Schematic diagram of driving the first electrode layer in an embodiment of the present invention Figure 1 ;

[0037] Figure 7 Schematic diagram of the structure of the first electrode layer in an embodiment of the present invention Figure 2 ;

[0038] Figure 8 Schematic diagram of driving the first electrode layer in an embodiment of the present invention Figure 2 ;

[0039] Fig. 9 is a module block diagram of a display device in an embodiment of the present invention;

[0040] Fig.10 The figure is a flow chart of a display control method in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The key to people's ability to discern depth of field (3D effect) is that the distance between the pupils of the two eyes is about 60mm, resulting in a position difference. The two images with "binocular parallax" become a pair of "stereoscopic images", which are fused by the visual cortex of the human brain to produce a three-dimensional effect. Therefore, 3D display products can separate the visible images of the left eye and the right eye to form binocular parallax, so that viewers can see 3D images.

[0042] An embodiment of the present invention provides a reflective 3D display module, in which a liquid crystal grating is arranged between a display panel and a reflective layer, the liquid crystal grating is divided into a first area and a second area, and the positions of the first area and the second area are configured to be adjusted according to the position of a human eye, and reflected light corresponding to the first area is emitted through a display component, and reflected light corresponding to the second area is blocked by the display panel, so that the light emitted through the display panel enters the left and right eyes respectively, forming a 3D display picture, thereby achieving a reflective naked-eye 3D display effect of human eye tracking.

[0043] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. The term "and / or" appearing herein is merely a description of an association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The term "multiple" includes two or more cases.

[0044] like Figure 1 As shown, an embodiment of the present invention provides a reflective 3D display module. Figure 1 As shown, the reflective 3D display module includes: a display panel 10 and a light control panel 11 disposed on a first side of the display panel 10. The light control panel 11 includes: a reflective layer 114 and a liquid crystal grating 110. The liquid crystal grating 110 is disposed between the reflective layer 114 and the display panel 10.

[0045] The reflective layer 114 is configured to reflect light incident from the second side of the display panel 10, wherein the second side is a side opposite to the first side. The ambient light incident from the second side of the display panel 10 sequentially passes through the display panel 10 and the liquid crystal grating 110 to enter the reflective layer 114, is reflected by the reflective layer 114, and then passes through the liquid crystal grating 110 again to enter the display panel 10. For ease of description, the light reflected by the reflective layer 114 is referred to as reflected light herein.

[0046] The liquid crystal grating 110 is divided into a first area and a second area (eg Figure 1The reflected light corresponding to the first area is emitted through the display panel 10, and the reflected light corresponding to the second area is blocked by the display panel 10, so that the light emitted through the display panel 10 enters the left and right eyes respectively, forming a 3D display screen. It should be noted that the liquid crystal grating 110 and the reflective layer 114 are stacked, and the first area and the second area of ​​the liquid crystal grating 110 both correspond to a reflective layer area, that is, the reflective layer area covered by the orthographic projection area of ​​the first area and the second area on the reflective layer 114. The reflected light corresponding to the first area is the light reflected by the reflective layer area corresponding to the first area, and the reflected light corresponding to the second area is the light reflected by the reflective layer area corresponding to the second area.

[0047] It can be understood that the reflected light corresponding to the first area is emitted through the display panel 10, and the reflected light corresponding to the second area is blocked by the display panel 10, so that corresponding light emitting areas and non-light emitting areas can be formed on the display panel 10, and the light emitting areas include the light emitting areas corresponding to the left eye viewpoint and the light emitting areas corresponding to the left eye viewpoint, and the non-light emitting areas separate the left and right eye viewpoints, so that the left and right eyes see different pictures to form parallax, and the brain then fuses the images, thereby achieving the naked-eye 3D display effect.

[0048] Furthermore, the positions of the first area and the second area are configured to be adjusted according to the position of the human eye. When the position of the human eye changes, the viewing angle may also change accordingly. The image positions corresponding to the left and right eyes are determined according to the position of the human eye, so that the positions of the first area and the second area are configured accordingly, and the light-emitting area and the non-light-emitting area of ​​the display panel 10 are adjusted to separate the left and right eye images, so that the left and right eyes see different images, and a 3D display image adapted to the current position of the human eye is obtained, that is, a naked-eye 3D effect of human eye tracking is achieved.

[0049] In an optional embodiment, if Figure 1 As shown, the liquid crystal grating 110 includes: a first electrode layer 111, a first liquid crystal layer 112 and a second electrode layer 113 which are stacked. Figure 2 As shown, the first electrode layer 111 includes: a plurality of electrode units 210, each electrode unit 210 corresponds to a liquid crystal region in the first liquid crystal layer 112. The plurality of electrode units 210 are insulated from each other, and each electrode unit 210 has an independent voltage control terminal, which can be individually controlled to be powered on or off. By controlling the driving state of each electrode unit 210 separately, the arrangement state of the liquid crystal molecules in the corresponding liquid crystal region can be adjusted to form the above-mentioned first region and second region.

[0050] For example, the first liquid crystal layer 112 may be a TN (Twisted Nematic) liquid crystal, or may be other types of liquid crystal, which is not limited in this embodiment. It is understandable that, in the case of no electric field applied to the TN liquid crystal, the liquid crystal molecules are in a twisted arrangement state, and the polarization direction of the incident light is rotated 90°. In the case of an electric field applied, the liquid crystal molecules are deflected and are in a vertical arrangement state, that is, the long axis of the liquid crystal molecules is approximately perpendicular to the electrode layer, so that the light can be emitted directly without twisting the polarization direction. This embodiment is mainly described by taking the TN liquid crystal as an example.

[0051] In a specific implementation, the second electrode layer 113 can be used as a common electrode to control the power supply and non-power supply of each electrode unit 210 in the first electrode layer 111, and the non-powered electrode unit 210 is called the first electrode unit slit1 (eg Figure 1 The white filled area in the first electrode layer 111 shown in FIG. 1 ), the powered electrode unit 210 is referred to as the second electrode unit slit2 (as shown in FIG. 1 ). Figure 1 111 in the grid-filled area shown in FIG. Figure 1 As shown, there is no electric field between the first electrode unit slit1 and the second electrode layer 113, and the liquid crystal molecules in the corresponding liquid crystal area are in the initial twisted arrangement state. The electric field is formed between the second electrode unit slit2 and the second electrode layer 113, and the liquid crystal molecules in the corresponding liquid crystal area are in a vertical arrangement state, so that the reflected light corresponding to the first electrode unit slit1 and the reflected light corresponding to the second electrode unit slit2 have different polarization characteristics, and the light emitting area and the non-light emitting area of ​​the display panel 10 are controlled in accordance with the polarization characteristics of the display panel 10. In this way, the above-mentioned first area and second area of ​​the liquid crystal grating 110 can be divided according to the first electrode unit slit1 and the second electrode unit slit2. Among them, the grating area corresponding to the first electrode unit slit1 is the first area, and the grating area corresponding to the second electrode unit slit2 is the second area.

[0052] In an optional embodiment, if Figure 1 As shown, the display panel 10 includes: a first polarizer 101, a liquid crystal display component 102, a second polarizer 103 and a phase retardation layer, which are stacked. The transmission axes of the first polarizer 101 and the second polarizer 103 are perpendicular. The phase retardation layer is designed to match the second polarizer 103, so that the reflected light in the first area of ​​the liquid crystal grating 110 can pass through the second polarizer 103 after passing through the phase retardation layer, enter the liquid crystal display component 102, and be emitted from the first polarizer 101, while the reflected light in the second area is blocked by the second polarizer 103 after passing through the phase retardation layer.

[0053] Among them, the manufacturing materials of the first polarizer 101 and the second polarizer 103 may include: polyvinyl alcohol (PVA). A scattering layer (not shown in the figure) may also be arranged between the phase retardation layer and the liquid crystal grating 110. The scattering layer can scatter the light, which has the effect of expanding the viewing angle and increasing the reflectivity. The second polarizer 103, the phase retardation layer and the scattering layer can be used together to enhance the optical display effect of the display module. For example, the phase retardation layer may include: a half wave plate 104 and a quarter wave plate 105, and the half wave plate 104 and the quarter wave plate 105 are stacked between the second polarizer 103 and the liquid crystal grating 110. The reflected light emitted from the liquid crystal grating 110 passes through the quarter wave plate 105 and the half wave plate 104 in turn and is incident on the second polarizer 103.

[0054] The liquid crystal display component 102 includes a substrate and a plurality of pixel units disposed on the substrate, each pixel unit including a plurality of sub-pixels, such as a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel. For example, the liquid crystal display component 102 includes: a substrate substrate, a cell substrate, and a second liquid crystal layer disposed between the substrate substrate and the cell substrate, wherein the substrate substrate is an array substrate, and the cell substrate is a color filter substrate, thereby forming the plurality of pixel units mentioned above.

[0055] like Figure 3 As shown, each electrode unit 210 in the first electrode layer 111 can be arranged corresponding to the pixel unit in the liquid crystal display component 102. In specific implementation, the shape and size of the electrode unit 210 can be set according to the shape and size of the pixel unit, for example, it can be set to a rectangle such as a rectangle or a parallelogram, or it can also be set to other shapes, which is not limited in this embodiment. In addition, the electrode unit 210 at least partially overlaps with the orthographic projection of the corresponding pixel unit on the substrate, so as to control the display and non-display of the corresponding pixel unit.

[0056] For example, Figure 4As shown, in the liquid crystal grating 110, the first electrode unit slit1 and the second electrode unit slit2 can be arranged alternately. Taking the three adjacent electrode units 210 starting from the first electrode unit slit1 as an example, the corresponding grating regions are region A1, region A2 and region A3, the liquid crystal molecules in region A1 and region A3 are in a twisted arrangement state, and the liquid crystal molecules in region A2 are in a vertical arrangement state. That is to say, region A1 and region A3 are both the first region, and region A2 is the second region. The reflected light L1 corresponding to the area A1 passes through the quarter wave plate 105, the half wave plate 104, the second polarizer 103, the liquid crystal display component 102 and the first polarizer 101 in sequence and is incident on the left eye viewpoint 20L. The reflected light L2 corresponding to the area A3 passes through the quarter wave plate 105, the half wave plate 104, the second polarizer 103, the liquid crystal display component 102 and the first polarizer 101 in sequence and is emitted to the right eye viewpoint 20R. The reflected light L3 corresponding to the area A2 passes through the quarter wave plate 105 and the half wave plate 104 in sequence and is blocked by the second polarizer 103 ( Figure 4 The “×” in the figure indicates blocking), forming a light-proof area, separating the left-eye viewpoint 20L and the right-eye viewpoint 20R, so that the left and right eyes receive their corresponding left and right eye images respectively to form parallax, thereby achieving a naked-eye 3D display effect.

[0057] In specific implementation, the first liquid crystal layer 112 and the second liquid crystal layer can both use TN liquid crystal, so that the overall display mode of the reflective 3D display module is TN normally white, which is suitable for outdoor 3D display. The light transmission axis angles of the first polarizer 101 and the second polarizer 103 are perpendicular to each other, ensuring that the ambient light incident from the second side of the display panel 10 can pass through the second polarizer 103 after passing through the liquid crystal display component 102. The linear polarization light passing through the second polarizer 103 is still linear polarization light after passing through the half wave plate 104, and then passes through the quarter wave plate 105. When the polarization direction of the linear polarization light is π / 4 or 3π / 4 with the slow axis angle of the quarter wave plate 105, the linear polarization light will be converted into circular polarization light. For the above-mentioned regions A1 and A3, the right circularly polarized light becomes left circularly polarized light after passing through the reflective layer 114, and becomes linearly polarized light after passing through the quarter wave plate 105, and is 45° with the slow axis of the quarter wave plate 105, and can pass through the second polarizer 103 after passing through the half wave plate 104. Through the design of polarization matching, it is ensured that region A1 can reflect light into the left eye, region A3 can reflect light into the right eye, while region A2 has different polarization control characteristics from regions A1 and A3 and cannot reflect light. The specific principle can refer to the relevant technology.

[0058] In addition, since each electrode unit 210 has an independent voltage control terminal, in specific implementation, the driving state of each electrode unit 210 can be controlled according to the position of the human eye, that is, the first electrode unit slit1 and the second electrode unit slit2 are configured according to the position of the human eye, thereby adjusting the position of the first area and the second area. For example, still taking the above-mentioned area A1, area A2 and area A3 as an example, in an application scenario, according to the position of the human eye, the electrode units 210 in the above-mentioned area A1 and area A3 are controlled to be powered on, and the electrode units 210 in area A2 are not powered on, then the electrode units 210 in area A1 and area A3 can be adjusted to the second electrode unit slit2, and the electrode unit 210 in area A2 can be adjusted to the first electrode unit slit1, so that area A1 and area are adjusted to the first area, and area A2 is adjusted to the second area.

[0059] In a specific implementation, there are many ways to set the electrode unit 210, and several of them are listed below for illustration. In other embodiments of the present invention, other applicable settings may also be used, and this embodiment does not limit this.

[0060] The first is that each electrode unit 210 is arranged on the same layer. At this time, in order to achieve mutual insulation between each electrode unit 210, adjacent electrode units 210 need to be spaced apart. The spacing between each electrode unit 210 can be specifically determined according to process conditions and crosstalk effects. For example, the spacing can be designed to be the same as the width of the black matrix (BM) of the pixel, such as 2.0μm to 5.0μm. It should be noted that the smaller the spacing between each electrode unit 210, the smoother the viewing effect when the human eye moves, but the crosstalk problem caused by the spacing needs to be comprehensively considered.

[0061] The second type is that the first electrode layer 111 includes multiple sub-electrode layers, a first insulating layer is provided between two adjacent sub-electrode layers, and adjacent electrode units 210 are distributed in different sub-electrode layers, which is conducive to reducing the requirements for the process and facilitating processing. While achieving mutual insulation between the electrode units 210, there can also be overlaps (Overlay) between adjacent electrode units 210 located in different layers to improve the smoothness of the viewing effect when the human eye moves, and at the same time, the requirements for the process can also be reduced. For example, the overlap width can be set to 0.6μm to 1.0μm, which is determined by the specific process.

[0062] The third type, such as Figure 5As shown, each electrode unit 210 includes a plurality of electrode sub-units 211, and the plurality of electrode sub-units 211 are arranged in the same layer. The plurality of electrode sub-units 211 are insulated from each other, and each electrode sub-unit 211 has an independent voltage control terminal, which can be individually controlled to be powered on or off. In other words, it can also be considered that the first electrode layer 111 is provided with M×N array-arranged electrode sub-units 211, and the powered partition can be adjusted in real time according to the position of the human eye, and a plurality of adjacent electrode sub-units 211 can be combined as one electrode unit 210. The driving states of the electrode sub-units 211 in the same electrode unit 210 are the same, that is, powered on at the same time or not powered on at the same time. It should be noted that the number of electrode sub-units 211 contained in the electrode unit 210 and the shape and size of each electrode sub-unit 211 can be set according to actual needs.

[0063] For example, Figure 6 As shown, each electrode unit 210 includes four electrode sub-units 211. For the electrode sub-units s1, s2, s3, s4, s5, s6, s7, s8 and s9 arranged adjacent to each other in the first electrode layer 111, in an application scenario 1, s1-s4 are not powered according to the position of the human eye, and s5-s8 are powered, that is, s1-s4 are combined into the first electrode unit slit1, and s5-s8 are combined into the second electrode unit slit2. In another application scenario 2, the position of the human eye changes, and it is necessary to not power s2-s5, and power s6-s9, that is, s2-s5 are combined into the first electrode unit slit1, and s6-s9 are combined into the second electrode unit slit2, so as to realize the "offset" of the first electrode unit slit1 and the second electrode unit slit2. In this way, the positions of the first area and the second area can be adjusted in the row direction and / or column direction with one electrode sub-unit 211 as the minimum offset, thereby improving the position adjustment accuracy of the first area and the second area and achieving better human eye tracking naked eye 3D display effect.

[0064] The fourth type is that each electrode unit 210 includes a plurality of electrode sub-units 211, and the plurality of electrode sub-units 211 are arranged in different layers. At this time, the first electrode layer 111 includes a plurality of sub-electrode layers, a first insulating layer is arranged between two adjacent sub-electrode layers, and a plurality of electrode sub-units 211 are distributed in the above-mentioned plurality of sub-electrode layers. The plurality of electrode sub-units 211 are insulated from each other, and each electrode sub-unit 211 has an independent voltage control terminal, which can be individually controlled to be powered on or off. The number of sub-electrode layers can be set according to actual needs. This is conducive to reducing the requirements for the process and facilitating processing. Furthermore, there may be an overlap (Overlay) between two adjacent electrode sub-units 211 distributed in different sub-electrode layers, that is, the orthographic projections of two adjacent electrode sub-units 211 on the first insulating layer partially overlap to improve the smoothness of the viewing effect when the position of the human eye moves, and at the same time, the requirements for the process can also be reduced. For example, the overlap width δ can be set to 0.6μm~1.0μm, which is determined by the specific process.

[0065] For example, Figure 7 As shown, the number of sub-electrode layers can be two layers, namely the first sub-electrode layer 111a and the second sub-electrode layer 111c. A first insulating layer 111b is arranged between the first sub-electrode layer 111a and the second sub-electrode layer 111c to achieve insulation. A plurality of electrode sub-units 211 are alternately distributed in the first sub-electrode layer 111a and the second sub-electrode layer 111c.

[0066] At this time, still taking the above-mentioned electrode subunits s1-s9 as an example, Figure 8 As shown, s1, s3, s5, s7 and s9 can be arranged at intervals in the first sub-electrode layer 111a, and s2, s4, s6 and s8 can be arranged at intervals in the second sub-electrode layer 111c, wherein s2 is arranged between s1 and s3, s4 is arranged between s3 and s5, s6 is arranged between s5 and s7, and s8 is arranged between s7 and s9. In an application scenario 1, s1-s4 are not energized according to the position of the human eye, and s5-s8 are energized, that is, s1-s4 are combined into the first electrode unit slit1, and s5-s8 are combined into the second electrode unit slit2. There is an overlap between the first electrode unit slit1 and the second electrode unit slit2 (such as Figure 8 In another application scenario 2, the position of the human eye changes, and it is necessary to not power s2-s5 and power s6-s9, that is, s2-s5 are combined into a first electrode unit slit1, and s6-s9 are combined into a second electrode unit slit2, so as to realize the "offset" of the first electrode unit slit1 and the second electrode unit slit2.

[0067] It should be noted that the positions of the first electrode layer and the second electrode layer can be interchanged. For example, in an optional embodiment, Figure 1 As shown, the first electrode layer may be an electrode layer disposed near the first side of the display panel 10, and the second electrode layer may be an electrode layer disposed near the reflective layer 114. In another optional embodiment, the first electrode layer may be an electrode layer disposed near the reflective layer 114, and the second electrode layer may be an electrode layer disposed near the first side of the display panel 10. This embodiment does not limit this. The second electrode layer may be a common electrode layer disposed in an entire layer, or a plurality of electrode units may be disposed corresponding to the first electrode layer, and an electrode unit pair may be formed with the electrode unit 210 in the first electrode layer, and this embodiment does not limit this.

[0068] It should also be noted that the electrode layer disposed near the first side of the display panel 10 in the liquid crystal grating 110 is a light-transmitting electrode, which is made of a transparent conductive material such as indium tin oxide (ITO) or zinc tin oxide. The electrode layer disposed near the reflective layer 114 and the reflective layer 114 may be the same layer, or may be different layers. Taking the second electrode layer as an example of an electrode layer disposed near the reflective layer 114, the reflective layer 114 may be directly used as the second electrode layer 113. For example, the reflective layer 114 may be made of a high-reflectivity metal material such as aluminum (AL) or silver (AG). When the second electrode layer 113 and the reflective layer 114 are different layers, a second insulating layer is disposed between the second electrode layer 113 and the reflective layer 114. At this time, the second electrode layer 113 is also a light-transmitting electrode, which is made of a transparent conductive material such as indium tin oxide (ITO) or zinc tin oxide.

[0069] The reflective 3D display module provided by the embodiment of the present invention adjusts the positions of the first area and the second area in the liquid crystal grating 110 according to the position of the human eye, thereby controlling the reflected light emitting areas and non-light emitting areas of different display areas of the display panel 10, so that the left and right eye images enter the left and right eyes respectively, thereby realizing a reflective naked-eye 3D display effect of human eye tracking.

[0070] In a second aspect, an embodiment of the present invention further provides a display device, such as Fig. 9 As shown, it includes: a human eye tracking module 901 and a reflective 3D display module 904.

[0071] Among them, the human eye tracking module 901 is configured to obtain the position of the human eye. For example, the human eye tracking module 901 may include a camera and a data processing module such as a SOC (System on Chip). The data processing module processes the human eye image captured by the camera to determine the position of the human eye. The specific principle can refer to the relevant technology and will not be described in detail here. Of course, in addition to the camera, the human eye tracking module 901 can also be implemented using other components such as infrared sensors, which is not limited in this embodiment.

[0072] The reflective 3D display module 904 is configured to adjust the positions of the first area and the second area in the liquid crystal grating 110 according to the position of the human eye, so that the light emitted by the display panel 10 enters the left and right eyes respectively to form a 3D display image. The specific structure of the reflective 3D display module 904 can refer to the relevant description in the first aspect above, and will not be repeated here.

[0073] In addition, the display device also includes a processor 902 and a driving chip 903 for driving the liquid crystal grating 110. In specific implementation, the SOC in the human eye tracking module 901 feeds back the human eye position to the processor 902, and the processor 902 determines the image positions corresponding to the left and right eyes according to the acquired human eye position. The specific implementation process can refer to the relevant technology.

[0074] Then, the processor 902 outputs the image positions corresponding to the left and right eyes to the driving chip 903, and the driving chip 903 controls the driving state of each electrode unit 210, controls whether the liquid crystal molecules in the corresponding liquid crystal area are deflected, thereby adjusting the positions of the first area and the second area in the liquid crystal grating 110, and controls the reflective light-emitting area and the non-light-emitting area of ​​the display area, so as to separate the left and right eye pictures, so that the left and right eyes see different pictures, and realize the reflective naked-eye 3D display with human eye tracking.

[0075] For example, the correspondence between the image positions of the left and right eyes and the driving modes of each electrode unit 210 under different human eye positions can be determined in advance through testing and stored in the driver chip 903 so that when in use, the driver chip 903 can control the driving state of each electrode unit 210 according to the received image position and the correspondence.

[0076] For example, the display device is a reflective display device, such as an outdoor reading display product or a wearable display product, etc. Among them, the outdoor reading display product may include: electronic newspapers, electronic books, etc. This embodiment of the application does not limit this.

[0077] In a third aspect, an embodiment of the present invention further provides a display control method, which is applied to the display device provided in the second aspect. Fig.10 As shown, the display control method may include:

[0078] Step S101, obtaining human eye position information;

[0079] Step S102, based on the eye position information, determining the image positions corresponding to the left and right eyes respectively;

[0080] Step S103 , based on the image positions corresponding to the left and right eyes, adjust the positions of the first area and the second area in the liquid crystal grating so that the light emitted through the display panel enters the left and right eyes respectively to form a 3D display picture.

[0081] It should be noted that the specific implementation process of step S101 to step S103 can refer to the relevant description in the above-mentioned second aspect and will not be repeated here.

[0082] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0083] In the above description, the technical details such as the composition of each layer of the product are not described in detail. However, those skilled in the art should understand that various technical means can be used to form layers, regions, etc. of desired shapes. In addition, in order to form the same structure, those skilled in the art can also design methods that are not completely the same as the methods described above. Although each embodiment is described separately above, it does not mean that the measures in each embodiment cannot be used in combination to advantage.

[0084] In addition, those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure is limited to these examples; based on the ideas of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present specification as described above, which are not provided in detail for the sake of simplicity.

[0085] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

Claims

1. A reflective 3D display module, characterized in that: include: A display panel and a light control panel disposed on a first side of the display panel, wherein the light control panel comprises: a reflective layer configured to reflect light incident from a second side of the display panel, wherein the second side is a side opposite to the first side; and a liquid crystal grating, arranged between the reflective layer and the display panel, the liquid crystal grating being divided into a first area and a second area, the positions of the first area and the second area being configured to be adjusted according to the positions of human eyes, the reflected light corresponding to the first area being emitted through the display panel, and the reflected light corresponding to the second area being blocked by the display panel, so that the light emitted through the display panel enters the left and right eyes respectively, forming a 3D display picture; The liquid crystal grating comprises: a first electrode layer, a first liquid crystal layer and a second electrode layer which are stacked; the first electrode layer comprises: a plurality of electrode units, each electrode unit respectively corresponding to a liquid crystal region in the first liquid crystal layer; the plurality of electrode units are insulated from each other, and each of the electrode units has an independent voltage control terminal, so as to adjust the arrangement state of liquid crystal molecules in the corresponding liquid crystal region by controlling the driving state of each electrode unit respectively, so as to form the first region and the second region; each of the electrode units comprises a plurality of electrode sub-units, the plurality of electrode sub-units are insulated from each other, and each of the electrode sub-units has an independent voltage control terminal, so as to individually control power on and power off.

2. The reflective 3D display module according to claim 1, characterized in that: The multiple electrode sub-units are located in the same layer.

3. The reflective 3D display module according to claim 1, characterized in that: The first electrode layer includes a plurality of sub-electrode layers, a first insulating layer is arranged between two adjacent sub-electrode layers, and the plurality of electrode sub-units are distributed in the plurality of sub-electrode layers.

4. The reflective 3D display module according to claim 3, characterized in that: The number of the sub-electrode layers is two, and the plurality of electrode sub-units are distributed in an alternating manner in the two sub-electrode layers.

5. The reflective 3D display module according to claim 3, characterized in that: Two adjacent electrode sub-units are distributed in different sub-electrode layers, and the orthographic projections of the two adjacent electrode sub-units on the first insulating layer partially overlap.

6. The reflective 3D display module according to claim 1, characterized in that: The second electrode layer and the reflective layer are the same layer, or the second electrode layer and the reflective layer are different layers, and a second insulating layer is arranged between the second electrode layer and the reflective layer.

7. The reflective 3D display module according to claim 1, characterized in that: The display panel comprises: a first polarizer, a liquid crystal display component, a second polarizer and a phase retardation layer which are stacked, wherein the light transmission axes of the first polarizer and the second polarizer are perpendicular, and reflected light from the first area passes through the phase retardation layer and then passes through the second polarizer, enters the liquid crystal display component, and is emitted from the first polarizer, and reflected light from the second area passes through the phase retardation layer and then is blocked by the second polarizer; The liquid crystal display component includes a base substrate and a plurality of pixel units arranged on the base substrate, each pixel unit includes a plurality of sub-pixels, the electrode unit is arranged corresponding to the pixel unit, and the orthographic projection of the electrode unit and the corresponding pixel unit on the base substrate at least partially overlaps.

8. The reflective 3D display module according to claim 7, characterized in that: The phase delay layer includes: a half wave plate and a quarter wave plate, which are stacked between the second polarizer and the liquid crystal grating. The reflected light emitted from the liquid crystal grating passes through the quarter wave plate and the half wave plate in sequence and is incident on the second polarizer.

9. A display device, characterized in that: include: A human eye tracking module, and a reflective 3D display module as claimed in any one of claims 1 to 8, The human eye tracking module is configured to obtain the human eye position; The reflective 3D display module is configured to adjust the positions of the first area and the second area in the liquid crystal grating according to the position of the human eye, so that the light emitted through the display panel enters the left and right eyes respectively to form a 3D display picture.

10. A display control method, characterized in that: Applied to the display device of claim 9, the method comprising: Obtaining human eye position information; Based on the eye position information, determining image positions corresponding to the left and right eyes respectively; Based on the image position, the positions of the first area and the second area in the liquid crystal grating are adjusted so that the light emitted through the display panel enters the left and right eyes respectively to form a 3D display picture.

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