Pixel unit, display panel and optical machine of head-mounted virtual reality equipment

Abstract

The invention relates to the technical field of semiconductors, particularly provides a pixel unit, a display panel and a light machine of head-mounted virtual reality equipment, and aims to solve the problem that the light deviation angle obtained by the existing solution is still small, so as to solve the problem that the light of the whole screen in AR / VR glasses is difficult to uniformly enter human eyes, and the display effect is poor. And edge brightness attenuation is severe. To this end, the pixel unit of the present application comprises: a light-emitting element; the light deflection unit is arranged on the light-emitting side of the light-emitting element and used for deflecting light emitted by the light-emitting element, the light deflection unit comprises a convex lens type light filter, the convex lens type light filter comprises a columnar base and an arc-shaped convex surface, and the convex surface faces the light-emitting element. The light of the pixel unit can be deflected towards the preset angle, the deflection angle of the light is increased, and a larger main light angle is obtained; when the light guide plate is applied to a display panel, light of a whole screen enters human eyes more uniformly, and the problem of serious edge brightness attenuation is solved.

Description

Technical Field

[0001] The present application relates to the field of semiconductor technology, and specifically provides an optical machine of a pixel unit, a display panel, and a head-mounted virtual reality device. Background Art

[0002] With the gradual development of AR (Augmented Reality) technology and VR (Virtual Reality) technology, silicon-based OLED (Organic Light Emitting Diode) has gradually emerged as a display device used in AR / VR glasses.

[0003] However, after a general display device passes through an AR / VR optical machine, the displayed image will show brightness decay from the center to the edge, affecting the user experience.

[0004] The existing solution is usually to reduce the loss of edge brightness by deflecting the light at the edge by moving the microlens (Lens) and color filter (CF) of the display device away from the center of the light-emitting device. However, due to the limitation of pixel size, the light deflection angle that can be obtained by this method is still small, and the brightness loss near the edge is still large, and the effect of combating the brightness attenuation at the edge of the screen is not satisfactory.

[0005] Accordingly, the art needs a new pixel unit solution to solve the above problems. Summary of the invention

[0006] The present application aims to solve the above-mentioned technical problems, namely, to solve the problem that the light deviation angle that can be obtained by the existing solution is still small, and further solve the problem that the light from the entire screen of AR / VR glasses is difficult to enter the human eye evenly and the edge brightness is severely attenuated.

[0007] In a first aspect, the present application provides a pixel unit, comprising:

[0008] Light emitting element;

[0009] A light deflection unit is arranged on the light emitting side of the light emitting element, and is used to deflect the light emitted from the light emitting element, wherein the light deflection unit comprises a convex lens type filter, and the convex lens type filter comprises a columnar base and an arc-shaped convex surface, and the convex surface faces the light emitting element.

[0010] In a technical solution of the above pixel unit, the light deflection unit further includes:

[0011] A first planarization layer is provided on a side of the filter away from the light emitting element;

[0012] The first dielectric layer is arranged on the side of the filter close to the light emitting element and covers the filter.

[0013] The refractive indexes of the first planarization layer and the first dielectric layer are both smaller than the refractive index of the optical filter, and the optical axis of the optical filter deviates from the central axis of the light-emitting element.

[0014] In a technical solution of the above pixel unit, the light deflection unit further includes:

[0015] A second planarization layer is provided on a side of the filter away from the light emitting element;

[0016] A second dielectric layer is disposed on a side of the filter close to the light emitting element and covers the filter;

[0017] A microlens, disposed on a side of the second planarization layer away from the light emitting element, wherein a convex surface of the microlens is away from the light emitting element;

[0018] A third dielectric layer is disposed on a side of the microlens away from the light emitting element and covers the microlens;

[0019] The refractive indexes of the second planarization layer and the second dielectric layer are both smaller than the refractive index of the filter, the refractive index of the microlens is not smaller than the refractive index of the second planarization layer, and the refractive index of the microlens is larger than the refractive index of the third dielectric layer;

[0020] And wherein, the overall central axis of the microlens and the filter deviates from the central axis of the light emitting element.

[0021] In a technical solution of the above pixel unit, the optical axis of the filter coincides with the central axis of the light-emitting element, and the optical axis of the microlens deviates from the central axis of the light-emitting element.

[0022] In a technical solution of the above pixel unit, the optical axis of the filter deviates from the central axis of the light emitting element along a first direction, and the optical axis of the microlens deviates further from the central axis of the light emitting element than the filter along the first direction.

[0023] In a technical solution of the above pixel unit, the materials of the first planarization layer and the first dielectric layer are both optically transparent glue.

[0024] In a technical solution of the above pixel unit, the materials of the second planarization layer and the second dielectric layer are both optically transparent glue, and the material of the third dielectric layer is optically transparent resin.

[0025] In a technical solution of the above pixel unit, it also includes:

[0026] a substrate, wherein the light emitting element is disposed on the substrate;

[0027] An encapsulation layer disposed between the light emitting element and the light deflection unit; and

[0028] A cover plate is arranged on a side of the light deflection unit away from the light emitting element.

[0029] In a second aspect, the present application provides a display panel, comprising a central area arranged along a center-to-edge direction and a plurality of annular areas surrounding the central area, wherein each of the plurality of annular areas comprises a pixel unit according to any of the above-mentioned technical solutions as a first type of pixel unit, wherein respective light deflection units are used to deflect light emitted from corresponding light-emitting elements.

[0030] In a technical solution of the above-mentioned display panel, the central area includes a second type of pixel unit, wherein the second type of pixel unit includes a light-emitting element, a filter arranged on the light-emitting side of the light-emitting element, and a microlens arranged on the side of the filter away from the light-emitting element, wherein the optical axes of the filter and the microlens coincide with the central axis of the corresponding light-emitting element.

[0031] In a technical solution of the above display panel, the filter in the second type of pixel unit is a planar type or a convex lens type.

[0032] In a technical solution of the above display panel, the first type of pixel units and the second type of pixel units include red pixel units, green pixel units and blue pixel units, which are arrayed in the central area and the multiple annular areas.

[0033] In a third aspect, the present application provides an optical machine of a head-mounted virtual reality device, comprising a screen, wherein the screen is composed of a display panel according to any of the above-mentioned technical solutions, wherein the light deflection unit of the pixel unit in the annular area farther away from the central area will deflect the light emitted from the corresponding light-emitting element at a larger angle.

[0034] When adopting the above-mentioned technical solution, the pixel unit in the present application increases the deflection angle of the light and obtains a larger main light angle; when applied to the display panel, a smaller brightness attenuation can be obtained within a larger side viewing range, so that the light of the entire screen enters the human eye more evenly, overcoming the problem of greater brightness loss closer to the edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, in which:

[0036] Figure 1A-1B is a schematic diagram of an OLED display device according to the prior art, wherein Figure 1AA partial cross-sectional view of the display device is shown, Figure 1B The light deflection principle of the display device is shown;

[0037] Figure 2A-2B is a schematic diagram of a pixel unit according to an embodiment of the present application, wherein Figure 1A shows a cross section of the pixel unit, Figure 1B The light deflection principle of the pixel unit is shown;

[0038] Figure 3A-3B is a schematic diagram of a pixel unit according to another embodiment of the present application, wherein Figure 3A shows a cross section of the pixel unit, Figure 3B The light deflection principle of the pixel unit is shown;

[0039] Figure 4A-4B is a schematic diagram of a pixel unit according to another embodiment of the present application, wherein Figure 4A shows a cross section of the pixel unit, Figure 4B The light deflection principle of the pixel unit is shown;

[0040] Figure 5 is a schematic diagram comparing brightness attenuation of a pixel unit under different main light angles according to an embodiment of the present application and the prior art;

[0041] Figure 6 is a schematic diagram of a display panel according to an embodiment of the present application;

[0042] Figure 7 It is a schematic diagram of a convex lens filter according to an embodiment of the present application. DETAILED DESCRIPTION

[0043] Some embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] In order to reduce the brightness attenuation at the edge and meet the requirement of light deflection, current OLED display devices usually set a micro lens above the color filter and make the micro lens and the color filter deviate from the center of the light emitting device. In the prior art, an OLED display device is provided, as shown in the attached Figure 1A-1B .

[0047] Figure 1A-1B is a schematic diagram of an OLED display device according to the prior art, wherein Figure 1A A partial cross-sectional view of the display device is shown, Figure 1B The light deflection principle of the display device is shown.

[0048] like Figure 1A As shown, the OLED display device comprises, from bottom to top, a light emitting device 11, an encapsulation layer 12, a filling layer 13, a color filter 14, a flat layer 15, a microlens 16, a patch adhesive 17 and a cover glass layer 18.

[0049] like Figure 1B As shown, the light deflection principle of the display device is as follows:

[0050] After being emitted by the light emitting device 11, the light passes through the encapsulation layer 12, the filling layer 13, the color filter 14 and the flat layer 15 and then enters the microlens 16. Since the microlens 16 and the color filter 14 deviate from the center of the light emitting device 11, the light will be deflected when passing through the microlens 16. However, due to the influence of the pixel size, the distance that the microlens 16 and the color filter 14 can deviate from the light emitting device 11 is limited, so the light deflection angle is still small, and the edge brightness of the display still cannot meet the use requirements of AR / VR devices.

[0051] In order to solve the above problems, the present application provides a pixel unit, comprising:

[0052] Light emitting element;

[0053] A light deflection unit is arranged on the light emitting side of the light emitting element, and is used to deflect the light emitted from the light emitting element, wherein the light deflection unit comprises a convex lens type filter, and the convex lens type filter comprises a columnar base and an arc-shaped convex surface, and the convex surface faces the light emitting element.

[0054] The light deflection unit can be implemented in a variety of ways, as long as it can deflect the light emitted from the light emitting element. Figure 2A-2B .

[0055] Figure 2A-2B is a schematic diagram of a pixel unit according to an embodiment of the present application, wherein Figure 2A shows a cross section of the pixel unit, Figure 2B The light deflection principle of the pixel unit is shown.

[0056] like Figure 2A As shown, the pixel unit 20 (shown in a dotted box in the figure) includes a light emitting element 21 and a light deflection unit 22 , wherein the light deflection unit 22 includes a convex lens filter 221 .

[0057] In one embodiment, the light deflection unit 22 further includes:

[0058] A first planarization layer 222 disposed on a side of the filter 221 away from the light emitting element 21;

[0059] The first dielectric layer 223 is disposed on a side of the filter 221 close to the light emitting element 21 and covers the filter 221 .

[0060] The refractive indexes of the first planarization layer 222 and the first dielectric layer 223 are both smaller than the refractive index of the filter 221, and the optical axis of the filter 221 deviates from the central axis of the light emitting element 21. In one embodiment, the optical axis of the filter 221 is indicated by AA, and the central axis of the light emitting element 21 is indicated by BB.

[0061] like Figure 2B As shown, the line segments with arrows represent the propagation direction of light, wherein only the light emitted from the center of the light emitting element 21 is shown. In fact, the light emitted from the light emitting element 21 is a group of parallel light. The light deflection principle of the pixel unit 20 is as follows:

[0062] After the light is emitted by the light emitting device 21, it passes through the first dielectric layer 223. Since the refractive indexes of the first planarization layer 222 and the first dielectric layer 223 are both smaller than the refractive index of the filter 221, the light is refracted when entering and exiting the filter 221, causing the light emitted by the light emitting element 21 to be deflected.

[0063] Exemplarily, the materials of the first planarization layer 222 and the first dielectric layer 223 are both optically transparent adhesives.

[0064] In terms of manufacturing process, for example, the filter 221 may be formed on the first planarization layer 222 first, and then the first dielectric layer 223 may be filled.

[0065] Furthermore, the filters in the prior art usually overlap at the junction of the pixel units, forming a horn-like morphology. In the present application, the upper overlapping portion can be removed by etching, so that each filter 221 retains a columnar base and an arc-shaped convex surface. The clear structure can ensure that the light is deflected to the required angle without being disturbed by the horn-like overlap.

[0066] Taking the plane where the optical axis is located as a reference plane, there is an angle between the main light passing through the pixel unit 20 and the reference plane, namely, the chief ray angle (CRA).

[0067] The structure of the pixel unit enables light to be deflected at a larger angle than the existing solution, and can optimize the attenuation of edge brightness when applied to a display panel. In addition, the pixel unit has a simple structure, does not require a common micro-convex lens to be arranged above the filter, and has a simple manufacturing process.

[0068] In addition, for convex lens type filters, see Figure 7 .

[0069] Figure 7 Schematic diagram of a convex lens filter according to an embodiment of the present application, wherein the convex lens filter 70 comprises a columnar base 71 and an arcuate convex surface 72. The columnar base 71 and the arcuate convex surface 72 are made of the same material, and the two are an integrally formed continuous structure, presenting a seamless connection as a whole.

[0070] On the one hand, adjacent filters 70 are closely arranged, and the arc-shaped convex surface 72 forms a convex lens effect, meeting the light deflection requirements; on the other hand, the columnar base 71 ensures that even at the edge, the filter 70 still has sufficient thickness to meet the color filtering requirements.

[0071] In another embodiment of the present application, the deflection angle of the light of the pixel unit can be further increased by adding a micro-convex lens.

[0072] Figure 3A-3B is a schematic diagram of a pixel unit according to another embodiment of the present application, wherein Figure 3A shows a cross section of the pixel unit, Figure 3B The light deflection principle of the pixel unit is shown.

[0073] like Figure 3A As shown, the pixel unit 30 includes a light emitting element 31 and a light deflection unit 32 , wherein the light deflection unit 32 includes a convex lens filter 321 .

[0074] In one embodiment, the light deflection unit 32 further includes:

[0075] A second planarization layer 322 is provided on a side of the filter 321 away from the light emitting element 31;

[0076] A second dielectric layer 323 is disposed on a side of the filter 321 close to the light emitting element 31 and covers the filter 321;

[0077] A micro lens 324 is disposed on a side of the second planarization layer 322 away from the light emitting element 31 , wherein a convex surface of the micro lens 324 is away from the light emitting element 31 ;

[0078] A third dielectric layer 325 is disposed on a side of the microlens 324 away from the light emitting element 31 and covers the microlens 324;

[0079] The refractive indexes of the second planarization layer 322 and the second dielectric layer 323 are both lower than the refractive index of the filter 321, the refractive index of the microlens 324 is not lower than the refractive index of the second planarization layer 322, and the refractive index of the microlens 324 is higher than the refractive index of the third dielectric layer 325;

[0080] And wherein, the overall central axis of the microlens 324 and the filter 321 deviates from the central axis of the light emitting element 31 .

[0081] The so-called overall central axis here refers to the central axis of the microlens 324 and the filter 321 as a whole. Figure 3A As shown, the central axis of the light emitting element 31 is indicated by DD, and the central axis of the microlens 324 is indicated by EE. Then the overall central axis of the microlens 324 and the filter 321 can be represented by the axis between the two, such as shown by CC in the figure.

[0082] Exemplarily, the materials of the second planarization layer 322 and the second dielectric layer 323 are both optically transparent adhesives, and the material of the third dielectric layer 325 is optically transparent resin.

[0083] In one embodiment of the present application, Figure 3A-3B As shown, the optical axis of the filter 321 coincides with the central axis of the light emitting element 31 , and the optical axis of the microlens 324 deviates from the central axis of the light emitting element 31 .

[0084] like Figure 3AAs shown, since the overall central axis of the microlens 324 and the filter 321 deviates from the central axis of the light emitting element 31, even if the optical axis of the filter 321 coincides with the central axis of the light emitting element 31, the requirement of light deflection can still be met.

[0085] like Figure 3B As shown, the line segments with arrows represent the propagation direction of light, wherein the light emitted from the center and non-center positions of the light emitting element 31 are respectively shown. The light deflection principle of the pixel unit 30 is as follows:

[0086] Since the refractive index of the microlens 324 is not less than the refractive index of the second planarization layer 322, and the refractive index of the microlens 324 is greater than the refractive index of the third dielectric layer 325, the light emitted by the light emitting device 31 is deflected after passing through the microlens 324. In addition, the light emitted from the area outside the center of the light emitting device 31 is also deflected when passing through the filter 321 before entering the microlens 324.

[0087] After the microlens 324 is provided, the plane where the optical axis is located is taken as the reference plane, and the main light angle of the pixel unit 30 is further increased. Applying the pixel unit 30 to a display panel can further optimize the attenuation of edge brightness.

[0088] In another embodiment of the present application, Figure 4A-4B As shown, the optical axis of the filter 421 deviates from the central axis of the light emitting element 41 along the first direction, and the optical axis of the microlens 424 deviates further from the central axis of the light emitting element 41 than the filter 421 along the first direction.

[0089] See also Figure 4A-4B , according to a schematic diagram of a pixel unit in another embodiment of the present application, wherein Figure 4A shows a cross section of the pixel unit, Figure 4B The light deflection principle of the pixel unit is shown.

[0090] like Figure 4A As shown, the central axis of the light emitting element 41 is indicated by GG, the optical axis of the filter 421 is indicated by HH, the optical axis of the microlens 424 is indicated by II, and the overall central axis of the microlens 424 and the filter 421 is indicated by FF.

[0091] like Figure 4B As shown, the line segments with arrows indicate the propagation direction of light, wherein only the light emitted from the center of the light emitting element 41 is shown. The light deflection principle of the pixel unit 40 is as follows:

[0092] After the light is emitted by the light emitting device 41, it passes through the second dielectric layer 423. Since the refractive indexes of the second planarizing layer 422 and the second dielectric layer 423 are both smaller than the refractive index of the filter 421, the light is refracted when entering and exiting the filter 421. Since the refractive index of the microlens 424 is not smaller than the refractive index of the second planarizing layer 422, the refractive index of the microlens 424 is greater than the refractive index of the third dielectric layer 425, and the optical axis of the microlens 424 deviates further from the central axis of the light emitting element 41 along the first direction than the filter 421, the light is further deflected after passing through the microlens 424.

[0093] After double deflection by the filter 421 and the microlens 424 , the plane where the optical axis is located is taken as the reference plane, and the main light angle of the pixel unit 40 is further increased, which can be applied to the display panel to further optimize the attenuation of the edge brightness.

[0094] by Figure 4A Taking the illustrated embodiment as an example, in each of the above-mentioned implementation modes, the pixel unit 40 further includes:

[0095] A substrate 43, wherein the light emitting element 41 is disposed on the substrate 43;

[0096] An encapsulation layer 44 disposed between the light emitting element 41 and the light deflection unit 42; and

[0097] A cover plate 45 is disposed on a side of the light deflecting unit 42 away from the light emitting element 41 .

[0098] In the above technical solution, by providing a light deflection unit, the deflection angle of the light emitted by the light emitting device is increased, and the main light angle of the pixel unit is increased, so as to reduce the brightness attenuation of the pixel unit.

[0099] See also Figure 5 , Figure 5 The figure is a schematic diagram comparing the brightness attenuation of a pixel unit under different main light angles according to an embodiment of the present application and the prior art.

[0100] like Figure 5 As shown, the existing method-simulation curve is a brightness attenuation simulation curve of a pixel unit in the prior art, and the method-simulation curve in this article is a brightness attenuation simulation curve of a pixel unit in an embodiment of the present application.

[0101] It can be seen that in the prior art, the brightness attenuation of the pixel unit is the smallest when the main light angle is 31°, and in an embodiment of the present application, the brightness attenuation of the pixel unit is the smallest when the main light angle is 37°. If the pixel unit described in the present application is applied to a display panel, a smaller brightness attenuation can be obtained in a larger side viewing range, so that the light of the entire screen enters the human eye more evenly.

[0102] Furthermore, the present application also provides a display panel, see Figure 6 .

[0103] Figure 6 is a schematic diagram of a display panel according to an embodiment of the present application.

[0104] The display panel includes a central area H1 arranged along the center to edge direction and a plurality of annular areas H2-Hn surrounding the central area, wherein each of the plurality of annular areas H2-Hn includes a pixel unit according to any of the above technical solutions as a first type of pixel unit, wherein respective light deflection units are used to deflect light emitted from corresponding light-emitting elements.

[0105] Further, in one embodiment, the central area H1 includes a second type of pixel unit, wherein the second type of pixel unit includes a light-emitting element, a filter arranged on the light-emitting side of the light-emitting element, and a microlens arranged on the side of the filter away from the light-emitting element, wherein the optical axes of the filter and the microlens coincide with the central axis of the corresponding light-emitting element.

[0106] In one embodiment, the filter in the second type of pixel unit is a planar filter or a convex lens filter.

[0107] In one embodiment, the first type of pixel units and the second type of pixel units include red pixel units, green pixel units and blue pixel units, which are arrayed in the central area and the plurality of annular areas.

[0108] The display panel is connected to a FPC (Flexible Printed Circuit) to display information such as images. In some application scenarios, for example, when the display panel is used for an optical screen of a head-mounted virtual reality device, it is required that the pixel units at the edge of the screen have a larger main light angle so that the light at the edge is deflected more, so that the light of the entire screen enters the human eye evenly.

[0109] Furthermore, the present application also provides an optical machine of a head-mounted virtual reality device, comprising a screen, wherein the screen is composed of a display panel according to any of the above-mentioned technical solutions, wherein the light deflection unit of the pixel unit in the annular area farther away from the central area will deflect the light emitted from the corresponding light-emitting element at a larger angle.

[0110] That is, the main light angle of the central area H1 of the display panel is 0°, and the main light angles of the annular areas increase from H2 to Hn. The arrangement can be based on the distance between the light deflection unit and the light emitting device in the above technical solution, that is, the distance of the convex lens type filter from the central axis of the light emitting device increases successively, or the distance of the overall central axis of the microlens and the filter from the central axis of the light emitting element increases successively.

[0111] Specifically, for the pixel unit of the annular area Hn at the edge, the maximum distance that the filter deviates from the central axis of the light-emitting device is 2 / 5 of the size of the pixel unit, and the maximum distance that the microlens deviates from the central axis of the light-emitting device is 1 / 2 of the size of the pixel unit. For each pixel unit, the distance that the microlens deviates from the central axis of its light-emitting device is greater than the distance that its filter deviates from the central axis of the light-emitting device.

[0112] Exemplarily, the width of each annular region in H2-Hn is 0.5 mm.

[0113] In fact, according to the requirements of the actual product for the main light angle, the deviation distance of the lens-type filter and / or microlens is simulated to produce the corresponding product. In addition, the main light angle of different annular areas can be further adjusted in combination with at least one physical quantity of the curvature and refractive index of the filter and / or microlens. The larger the curvature of the filter and / or the microlens, the larger the light deflection angle and the larger the main light angle; the larger the difference between the refractive index of the filter and / or the microlens and the refractive index of the adjacent structure, the larger the light deflection angle and the larger the main light angle.

[0114] Exemplarily, the difference between the refractive index of the filter and / or the microlens and the refractive index of an adjacent structure is greater than 0.15.

[0115] In one embodiment, the light emitting device uses silicon-based OLED. Since silicon-based OLED uses a single-crystal silicon wafer as the driving backplane of OLED, it is easy to achieve the high PPI, high contrast, low power consumption and fast response speed required by AR / VR. The main light angle of the display panel increases from the center to the edge, overcoming the problem of edge brightness attenuation, so that the light of the entire screen in AR / VR glasses enters the human eye evenly.

[0116] The optical machine of the head-mounted virtual reality device described in the present application can have all the features and advantages of the aforementioned pixel unit and display panel, which will not be repeated here.

[0117] Those skilled in the art will appreciate that the optical machine described in the present application may include but is not limited to the above-mentioned display panel, and may also include other components or combinations of components, such as memory, processor, sensor and other components.

[0118] All the above optional technical solutions can be arbitrarily combined to form optional embodiments of the present application, which will not be described one by one here.

[0119] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0120] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A pixel unit, characterized in that: include: Light emitting element; A light deflection unit is arranged on the light emitting side of the light emitting element, and is used to deflect the light emitted from the light emitting element, wherein the light deflection unit comprises a convex lens type filter, and the convex lens type filter comprises a columnar base and an arc-shaped convex surface, and the convex surface faces the light emitting element.

2. The pixel unit according to claim 1, characterized in that: The light deflection unit further includes: A first planarization layer is provided on a side of the filter away from the light emitting element; The first dielectric layer is arranged on the side of the filter close to the light emitting element and covers the filter. The refractive indexes of the first planarization layer and the first dielectric layer are both smaller than the refractive index of the optical filter, and the optical axis of the optical filter deviates from the central axis of the light-emitting element.

3. The pixel unit according to claim 1, characterized in that: The light deflection unit further includes: A second planarization layer is provided on a side of the filter away from the light emitting element; A second dielectric layer is disposed on a side of the filter close to the light emitting element and covers the filter; A microlens, disposed on a side of the second planarization layer away from the light emitting element, wherein a convex surface of the microlens is away from the light emitting element; A third dielectric layer is disposed on a side of the microlens away from the light emitting element and covers the microlens; The refractive indexes of the second planarization layer and the second dielectric layer are both smaller than the refractive index of the filter, the refractive index of the microlens is not smaller than the refractive index of the second planarization layer, and the refractive index of the microlens is larger than the refractive index of the third dielectric layer; And wherein, the overall central axis of the microlens and the filter deviates from the central axis of the light emitting element.

4. The pixel unit according to claim 3, characterized in that: The optical axis of the filter coincides with the central axis of the light emitting element, and the optical axis of the microlens deviates from the central axis of the light emitting element.

5. The pixel unit according to claim 3, characterized in that: The optical axis of the color filter deviates from the central axis of the light emitting element along a first direction, and the optical axis of the microlens deviates further from the central axis of the light emitting element than the color filter along the first direction.

6. The pixel unit according to claim 2, characterized in that: The first planarization layer and the first dielectric layer are both made of optically transparent adhesive.

7. The pixel unit according to claim 3, characterized in that: The materials of the second planarization layer and the second dielectric layer are both optically transparent adhesives, and the material of the third dielectric layer is optically transparent resin.

8. The pixel unit according to claim 1, characterized in that: Also includes: a substrate, wherein the light emitting element is disposed on the substrate; An encapsulation layer disposed between the light emitting element and the light deflection unit; as well as A cover plate is arranged on a side of the light deflection unit away from the light emitting element.

9. A display panel, characterized in that: The display panel includes a central area arranged along the center to edge direction and a plurality of annular areas surrounding the central area, wherein each of the plurality of annular areas includes a pixel unit according to any one of claims 1 to 8 as a first type of pixel unit, wherein respective light deflection units are used to deflect light emitted from corresponding light-emitting elements.

10. The display panel according to claim 9, characterized in that: The central area includes a second type of pixel unit, wherein the second type of pixel unit includes a light-emitting element, a filter arranged on the light-emitting side of the light-emitting element, and a microlens arranged on the side of the filter away from the light-emitting element, wherein the optical axes of the filter and the microlens coincide with the central axis of the corresponding light-emitting element.

11. The display panel according to claim 10, characterized in that: The filter in the second type of pixel unit is a plane type or a convex lens type.

12. The display panel according to claim 10 or 11, characterized in that: The first type of pixel units and the second type of pixel units include red pixel units, green pixel units and blue pixel units, which are arrayed in the central area and the plurality of annular areas.

13. An optical machine for a head-mounted virtual reality device, characterized in that: A screen is included, wherein the screen is formed by a display panel according to any one of claims 9 to 12, wherein the light deflection units of the pixel units in the annular area farther from the central area deflect the light emitted from the corresponding light emitting element at a larger angle.

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