CN112526754A - Display device and head-mounted display - Google Patents
Display device and head-mounted display Download PDFInfo
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- CN112526754A CN112526754A CN202011436403.2A CN202011436403A CN112526754A CN 112526754 A CN112526754 A CN 112526754A CN 202011436403 A CN202011436403 A CN 202011436403A CN 112526754 A CN112526754 A CN 112526754A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
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Abstract
本发明公开一种显示器件和头戴式显示器，其中，显示器件包含显示面板和偏振转换器，所述偏振转换器包括依次设置于所述显示面板同一侧的吸收式偏光片、第一四分之一波片、半透半反镜、第二四分之一波片和反射式偏光片；所述显示器件还包括第一相位延迟膜、第二相位延迟膜和第三相位延迟膜，其中，所述第一相位延迟膜设于所述吸收式偏光片与所述半透半反镜之间，所述第二相位延迟膜设于所述半透半反镜与所述反射式偏光片之间，所述第三相位延迟膜设于所述吸收式偏光片与所述反射式偏光片之间。本发明技术方案旨在改善显示器件的漏光，增加显示器件的视角，以提升显示器件的显示效果。
The invention discloses a display device and a head-mounted display, wherein the display device includes a display panel and a polarization converter, and the polarization converter includes an absorbing polarizer, a first quarter polarizer and a a first wave plate, a half mirror, a second quarter wave plate and a reflective polarizer; the display device further includes a first phase retardation film, a second phase retardation film and a third phase retardation film, wherein , the first phase retardation film is arranged between the absorbing polarizer and the half mirror, and the second phase retardation film is arranged between the half mirror and the reflective polarizer and the third phase retardation film is arranged between the absorbing polarizer and the reflective polarizer. The technical solution of the present invention aims to improve the light leakage of the display device, increase the viewing angle of the display device, and improve the display effect of the display device.
Description
Technical Field
The invention relates to the field of display, in particular to a display device and a head-mounted display.
Background
In the head-mounted optical display technology, virtual information received by human eyes is realized by an optical display device, and the imaging quality of the display device is particularly critical for improving the immersion and the use comfort of a user. However, the conventional display device is easy to cause light leakage during display, thereby generating a ghost phenomenon and affecting the display effect.
Disclosure of Invention
The invention mainly aims to provide a display device, aiming at improving the light leakage of the display device and increasing the visual angle of the display device so as to improve the display effect of the display device.
In order to achieve the above object, the display device provided by the present invention includes a display panel and a polarization converter, wherein the polarization converter includes an absorption polarizer, a first quarter-wave plate, a half-mirror, a second quarter-wave plate and a reflective polarizer, which are sequentially disposed on the same side of the display panel;
the display device further comprises a first phase delay film, a second phase delay film and a third phase delay film, wherein the first phase delay film is arranged between the absorption polarizer and the semi-transparent semi-reflecting mirror, the second phase delay film is arranged between the semi-transparent semi-reflecting mirror and the reflection polarizer, and the third phase delay film is arranged between the absorption polarizer and the reflection polarizer;
the light emitted by the display panel is converted into linearly polarized light after passing through the absorption type polarizer, the linearly polarized light forms circularly polarized light after passing through the first quarter-wave plate, and the circularly polarized light is converted into the linearly polarized light after passing through the semi-transparent semi-reflecting mirror and the second quarter-wave plate and then is completely reflected by the reflection type polarizer without entering human eyes.
Optionally, the third phase retardation film is disposed between the absorptive polarizer and the first quarter-wave plate; or, the third phase retardation film is arranged between the reflective polarizer and the second quarter-wave plate.
Optionally, when the third phase retardation film is disposed between the absorptive polarizer and the first quarter-wave plate, the first phase retardation film is disposed between the third phase retardation film and the first quarter-wave plate and the second phase retardation film is disposed between the reflective polarizer and the second quarter-wave plate, or the first phase retardation film is disposed between the first quarter-wave plate and the half-mirror and the second phase retardation film is disposed between the second quarter-wave plate and the half-mirror.
Optionally, when the third phase retardation film is disposed between the reflective polarizer and the second quarter-wave plate, the first phase retardation film is disposed between the absorptive polarizer and the first quarter-wave plate and the second phase retardation film is disposed between the third phase retardation film and the second quarter-wave plate, or the first phase retardation film is disposed between the first quarter-wave plate and the half-mirror and the second phase retardation film is disposed between the second quarter-wave plate and the half-mirror.
Optionally, the half mirror includes a lens and a half mirror disposed on a surface of one side of the lens close to the first quarter-wave plate, where the lens is a plano-convex lens, a biconvex lens, or a meniscus lens.
Optionally, the first phase retardation film and the second phase retardation film are positive C-plate films.
Optionally, the first phase retardation film has an in-plane retardation of 0nm to 10nm and an out-of-plane retardation of-250 nm to-50 nm; the second phase retardation film has the same in-plane retardation and out-of-plane retardation as the first phase retardation film.
Optionally, the third retardation film comprises at least one B-Plate type retardation film, and a slow axis of the third retardation film is parallel to a transmission axis of the reflective polarizer.
Alternatively, the B-Plate type retardation film has an in-plane retardation of 100nm to 300nm and an out-of-plane retardation of-50 nm to-5 nm.
Optionally, the third phase retardation film comprises a composite film formed by compounding a positive a-Plate type retardation film and a positive C-Plate type retardation film, wherein the in-plane retardation of the positive a-Plate type retardation film is 100nm to 180nm, the slow axis of the third phase retardation film is perpendicular to the transmission axis of the reflective polarizer, and the out-of-plane retardation of the positive C-Plate type retardation film is-300 nm to-30 nm.
The invention also provides a head-mounted display which comprises the display device.
The technical scheme of the invention adopts the polarization converter to reflect and absorb the polarized light; the first phase retardation film and the second phase retardation film are adopted to compensate the off-axis retardation of the polarization conversion device, so that the light leakage condition of the polarization conversion device under a large viewing angle is improved; the third phase retardation film is used as a visual angle compensation film, so that light leakage caused by the fact that the absorption type polaroid and the reflection type polaroid are in a geometric non-orthogonal state under a large visual angle is improved, the light leakage condition of the display device is improved from multiple aspects, the visual angle of the display device is increased, and the display effect of the display device is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
200 | |
| 210 | |
220 | The first quarter- |
| 230 | Semi-transparent |
240 | Second |
| 250 | |
300 | First |
| 400 | Second |
500 | Third phase retardation film |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a display device.
In an embodiment of the invention, as shown in fig. 1, the display device includes a display panel 100 and a polarization converter 200, wherein the polarization converter 200 includes an absorptive polarizer 210, a first quarter-wave plate 220, a half-mirror 230, a second quarter-wave plate 240, and a reflective polarizer 250 sequentially disposed on the same side of the display panel 100. The optical axes of the first quarter-wave plate 220 and the second quarter-wave plate 240 are orthogonal to each other, and the transmission axis of the absorbing polarizer 210 is orthogonal to the transmission axis of the reflective polarizer 250.
The display panel 100 is used for displaying image information required by a user, and theoretically, light emitted from the display panel 100 is converted into linearly polarized light after passing through the absorbing polarizer 210, and the linearly polarized light forms circularly polarized light after passing through the first quarter-wave plate 220. When the circularly polarized light passes through the half mirror 230, the circularly polarized light partially transmits therethrough, and the phase of the transmitted portion does not change. The transmitted portion of the circularly polarized light continues to pass through the second quarter wave plate 240, and the phase thereof is changed and converted into linearly polarized light before passing through the first quarter wave plate 220. Finally, the linearly polarized light is reflected by the reflective polarizer 250 without entering human eyes, and the light leakage problem is avoided.
For example, the light emitted from the display panel is converted into S-polarized light after passing through the absorption polarizer 210; of course, the light emitted from the display panel can be converted into P-polarized light after passing through the absorbing polarizer 210. After the S polarized light continues to pass through the first quarter wave plate 220, the phase thereof is delayed, and the S polarized light is converted into left circularly polarized light; when passing through the half mirror 230, the left-handed circularly polarized light can partially transmit, and the phase of the transmitted part is not changed; this portion of the left-hand polarized light continues through the second quarter wave plate 240, which can be converted to S-polarized light by the second quarter wave plate 240; the S-polarized light is totally reflected when it reaches the reflective polarizer.
However, when the polarization converter 200 polarizes and selects an optical signal with a large viewing angle, the effect of the polarization converter 200 is in an undesirable state due to the change of the incident angle of light, which causes light leakage and a ghost phenomenon. In order to solve the problem that the absorption polarizer 210 and the reflective polarizer 250 have non-orthogonal geometric relationship under the oblique viewing angle, so that the light path of the light does not completely proceed according to the foregoing theory and light leakage occurs, the display device of the present invention further includes:
a first phase retardation film 300, a second phase retardation film 400, and a third phase retardation film 500. The first phase retardation film 300 is disposed between the absorptive polarizer 210 and the transflective polarizer 230, the second phase retardation film 400 is disposed between the transflective polarizer 230 and the reflective polarizer 250, and the third phase retardation film 500 is disposed between the absorptive polarizer 210 and the reflective polarizer 250.
The first phase retardation film 300 is provided for the purpose of: compensate for the off-axis retardation of the first quarter-wave plate 220; the second phase retardation film 400 is provided for the purpose of: the off-axis retardation of the second quarter-wave plate 240 is compensated, so that the light leakage of the polarization converter 200 under a large viewing angle is improved, and the display effect of the display device is further improved. Alternatively, the first phase retardation film 300 may be disposed between the absorptive polarizer 210 and the first quarter-wave plate 220, or between the first quarter-wave plate 220 and the half mirror 230, for compensating the off-axis retardation generated by the off-axis light after passing through the first quarter-wave plate, and the second phase retardation film 400 may be disposed between the half mirror 230 and the second quarter-wave plate 240, or between the second quarter-wave plate 240 and the reflective polarizer 250, for compensating the off-axis retardation generated by the off-axis light after passing through the second quarter-wave plate.
Further, when the first phase retardation film 300 is disposed between the absorptive polarizer 210 and the first quarter-wave plate 220, the second phase retardation film 400 is disposed between the second quarter-wave plate 240 and the reflective polarizer 250; when the first phase retardation film 300 is disposed between the first quarter-wave plate 220 and the half mirror 230, the second phase retardation film 400 is disposed between the half mirror 230 and the second quarter-wave plate 240.
The purpose of disposing the third retardation film 500 between the absorptive polarizer 210 and the reflective polarizer 250 is to serve as a viewing angle compensation film, so as to increase the viewing angle of the display device, so as to improve the light leakage caused by the fact that the absorptive polarizer 210 and the reflective polarizer 250 are in a geometrically non-orthogonal state under a large viewing angle, thereby further improving the display effect of the display device.
Further, the third phase retardation film 500 may be disposed between the absorptive polarizer 210 and the first quarter-wave plate 220, for example, the third phase retardation film 500 is attached to the absorptive polarizer 210; alternatively, the third phase retardation film 500 is disposed between the reflective polarizer 250 and the second quarter-wave plate 240, for example, the third phase retardation film 500 is attached to the reflective polarizer 250.
To ensure the best off-axis retardation compensation for the first quarter-wave plate 220 and the second quarter-wave plate 240, when the third phase retardation film 500 is disposed between the absorptive polarizer 210 and the first quarter-wave plate 220, the first phase retardation film 300 is disposed between the third phase retardation film 500 and the first quarter-wave plate 220 and the second phase retardation film 400 is disposed between the reflective polarizer 250 and the second quarter-wave plate 240. Or, when the third phase retardation film 500 is disposed between the absorptive polarizer 210 and the first quarter-wave plate 220, the first phase retardation film 300 is disposed between the first quarter-wave plate 220 and the half-reflective and half-transmissive mirror 230 and the second phase retardation film 400 is disposed between the second quarter-wave plate 240 and the half-reflective and half-transmissive mirror 230. When the third phase retardation film 500 is disposed between the reflective polarizer 250 and the second quarter-wave plate 240, the first phase retardation film 300 is disposed between the absorptive polarizer 210 and the first quarter-wave plate 220 and the second phase retardation film 400 is disposed between the third phase retardation film 500 and the second quarter-wave plate 240. Or, when the third phase retardation film 500 is disposed between the reflective polarizer 250 and the second quarter-wave plate 240, the first phase retardation film 300 is disposed between the first quarter-wave plate 220 and the half-reflective and half-transmissive mirror 230 and the second phase retardation film 400 is disposed between the second quarter-wave plate 240 and the half-reflective and half-transmissive mirror 230. Thus, the first phase retardation film 300 and the second phase retardation film 400 can be symmetrically distributed on two sides of the half mirror 230, and the compensation effect of the first phase retardation film 300 and the second phase retardation film 400 can not be affected by the addition of the third phase retardation film 500.
The following description will be given by way of a specific example.
The absorption polarizer 210 and the reflection polarizer 250 are disposed orthogonally to each other, the slow axis of the first quarter-wave plate 220 forms an included angle of 45 ° or 135 ° with the absorption axis of the absorption polarizer 210, and the slow axis of the second quarter-wave plate 240 is perpendicular to the slow axis of the first quarter-wave plate 220. The light emitted from the display panel 100 is first converted into S-polarized light, the first quarter-wave plate 220 converts the S-polarized light into left-handed circularly polarized light, and the second quarter-wave plate 240 converts part of the left-handed circularly polarized light transmitted through the half mirror 230 into S-polarized light, so that the reflective polarizer can completely reflect the S-polarized light. By adding the first phase retardation film 300, the second phase retardation film 400 and the third phase retardation film 500, off-axis phase retardation generated when light is incident at a large viewing angle and an orthogonal polarizer are in a geometrical non-orthogonal state to perform phase compensation and viewing angle compensation, so that light leakage under the large viewing angle is prevented, the light leakage condition of a display device is improved, and the display effect of the display device is improved.
In the present embodiment, the absorption polarizer 210 is a polarizer obtained by adsorbing an iodine complex or a dye having dichroism on a PVA (polyvinyl alcohol) film and extending the same in a certain direction, and TAC (Triacetyl Cellulose) transparent films are bonded to both sides of the PVA film for protection, and each layer structure of the display device is bonded by using an OCA (optical Clear Adhesive).
Optionally, the Display panel 100 is an LCD (Liquid Crystal Display) Display panel, an OLED (Organic Light-Emitting Diode) Display panel, or a Micro-LED (Micro-Light-Emitting Diode) Display panel.
The LCD display panel, namely the liquid crystal display panel, utilizes the liquid crystal solution in the two polarized materials, and the liquid crystal is rearranged when the current passes through the liquid to achieve the purpose of imaging, and the LCD display panel has low cost, low power consumption, small volume, low radiation and high screen brightness, and is suitable for being used as the display panel 100 of the head-mounted display;
the OLED display panel is a display panel which utilizes a multi-layer organic thin film structure to generate electroluminescence, is easy to manufacture, and needs low driving voltage, more importantly, the OLED display panel is thinner and thinner than an LCD display panel, has high brightness, low power consumption, quick response, high definition, good flexibility and high luminous efficiency, and can meet the high requirements of consumers on head-mounted display technology;
the Micro-LED display panel adopts LED Micro and matrixing technology, a high-density integrated LED array is integrated in the Micro-LED display panel, the distance between LED pixel points in the array is 10 microns, and each LED pixel can self-illuminate, so that the Micro-LED display panel has higher brightness, better luminous efficiency and lower power consumption compared with an OLED display panel, and meets the requirement of consumers on the display panel with higher performance.
In practical application, the display panel can be selected according to consumers with different requirements.
Further, in this embodiment, the half mirror 230 includes a lens and a half mirror film disposed on a surface of the lens close to the first quarter-wave plate 220, wherein the lens is a plano-convex lens, a biconvex lens, or a meniscus lens. The lenses in the half-mirror 230 are preferably plano-convex lenses, or bi-convex lenses, or meniscus lenses, and particularly, the bi-convex lenses can be mounted without distinguishing directions, which can improve the fool-proof performance of the display device in manufacturing.
Alternatively, the transmittance of the half mirror 230 is set to 30% to 70%, that is, the transmittance of the half mirror film is set to 30% to 70%, so that the half mirror 230 reflects part of the circularly polarized light while transmitting part of the circularly polarized light.
Further, in the present embodiment, the first phase retardation film 300 and the second phase retardation film 400 are positive C-plate films. The positive C-plate film has a principal refractive index in three axes satisfying nz > nx ═ ny, where nx denotes a refractive index in a direction in which an in-plane refractive index is maximum (i.e., a refractive index in a slow axis direction), ny denotes a refractive index in a direction orthogonal to nx, nz denotes a refractive index in a thickness direction, and the positive C-plate film serves as the first phase retardation film and the second phase retardation film, and can improve the effect of the first phase retardation film 300 and the second phase retardation film 400 in compensating for the off-axis retardation of the polarization converter 200.
Further, in the present embodiment, the in-plane retardation of the first phase retardation film 300 is 0nm to 10nm, and the out-of-plane retardation is-250 nm to-50 nm; the second phase retardation film 400 has the same in-plane retardation and out-of-plane retardation as the first phase retardation film 300, so as to further improve the compensation effect of the first phase retardation film 300 and the second phase retardation film 400 on the off-axis retardation of the polarization converter 200, thereby improving the light leakage condition of the polarization converter 200 under a large viewing angle.
Further, in the present embodiment, the third retardation film 500 includes at least one B-Plate retardation film, and a slow axis of the third retardation film is parallel to a transmission axis of the reflective polarizer, so as to improve the viewing angle compensation effect of the third retardation film 500. The three-axis main refractive index of the B-Plate type retardation film is required to satisfy the following conditions: nx > nz > ny, and optionally, in the third phase retardation film 500, the number of the B-Plate type retardation films is one or two, and the viewing angle compensation effect is more excellent.
Further, in the present embodiment, the retardation of the B-Plate retardation film is 100nm to 300nm in-plane and-50 nm to-5 nm out-of-plane, so as to further improve the viewing angle compensation effect of the third retardation film 500, thereby avoiding the light leakage caused by the non-orthogonal geometric relationship of the two polarizers when the viewing angle is tilted.
In another embodiment of the present invention, the third phase retardation film includes a composite film formed by compounding a positive a-Plate type retardation film having an in-plane retardation of 100nm to 180nm and a slow axis perpendicular to a transmission axis of the reflective polarizer, and a positive C-Plate type retardation film having an out-of-plane retardation of-300 nm to-30 nm. Wherein, the three-axis main refractive index of the positive A-Plate retardation film satisfies the following conditions: nx > ny ═ nz, the third phase retardation film in the embodiment can further improve the viewing angle compensation effect, thereby avoiding the situation that the two polarizing plates are not orthogonal in the geometric relative relationship under the condition of inclined viewing angle to generate light leakage.
The present invention further provides a head-mounted display, which includes a display device, and the specific structure of the display device refers to the above embodiments, and since the head-mounted display adopts all technical solutions of all the above embodiments, the head-mounted display at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A display device is characterized by comprising a display panel and a polarization converter, wherein the polarization converter comprises an absorption polarizer, a first quarter wave plate, a semi-transparent semi-reflecting mirror, a second quarter wave plate and a reflection polarizer which are sequentially arranged on the same side of the display panel;
the display device further comprises a first phase delay film, a second phase delay film and a third phase delay film, wherein the first phase delay film is arranged between the absorption polarizer and the semi-transparent semi-reflecting mirror, the second phase delay film is arranged between the semi-transparent semi-reflecting mirror and the reflection polarizer, and the third phase delay film is arranged between the absorption polarizer and the reflection polarizer;
the light emitted by the display panel is converted into linearly polarized light after passing through the absorption type polarizer, the linearly polarized light forms circularly polarized light after passing through the first quarter-wave plate, and the circularly polarized light is converted into the linearly polarized light after passing through the semi-transparent semi-reflecting mirror and the second quarter-wave plate and then is completely reflected by the reflection type polarizer without entering human eyes.
2. The display device according to claim 1, wherein the third phase retardation film is provided between the absorptive polarizer and the first quarter-wave plate; or, the third phase retardation film is arranged between the reflective polarizer and the second quarter-wave plate.
3. The display device according to claim 2, wherein when the third phase retardation film is disposed between the absorptive polarizer and the first quarter-wave plate, the first phase retardation film is disposed between the third phase retardation film and the first quarter-wave plate and the second phase retardation film is disposed between the reflective polarizer and the second quarter-wave plate, or wherein the first phase retardation film is disposed between the first quarter-wave plate and the semi-transflective mirror and the second phase retardation film is disposed between the second quarter-wave plate and the semi-transflective mirror; or the like, or, alternatively,
when the third phase retardation film is disposed between the reflective polarizer and the second quarter-wave plate, the first phase retardation film is disposed between the absorptive polarizer and the first quarter-wave plate and the second phase retardation film is disposed between the third phase retardation film and the second quarter-wave plate, or the first phase retardation film is disposed between the first quarter-wave plate and the half-mirror and the second phase retardation film is disposed between the second quarter-wave plate and the half-mirror.
4. The display device according to claim 1, wherein the half mirror includes a lens and a half mirror film provided on a surface of the lens on a side close to the first quarter-wave plate, wherein the lens is a plano-convex lens, a biconvex lens, or a meniscus lens.
5. The display device according to claim 1, wherein the first phase retardation film and the second phase retardation film are positive C-plate films.
6. The display device according to claim 1, wherein the first phase retardation film has an in-plane retardation of 0nm to 10nm and an out-of-plane retardation of-250 nm to-50 nm; the second phase retardation film has the same in-plane retardation and out-of-plane retardation as the first phase retardation film.
7. The display device according to any one of claims 1 to 6, wherein the third retardation film comprises at least one B-Plate type retardation film, and a slow axis of the third retardation film is parallel to a transmission axis of the reflective polarizer.
8. The display device according to claim 7, wherein the B-Plate type retardation film has an in-plane retardation of 100nm to 300nm and an out-of-plane retardation of-50 nm to-5 nm.
9. The display device according to any one of claims 1 to 6, wherein the third phase retardation film comprises a composite film formed by compounding a positive a-Plate type retardation film having an in-plane retardation of 100nm to 180nm and a negative C-Plate type retardation film having a slow axis perpendicular to a transmission axis of the reflective polarizer and an out-of-plane retardation of-300 nm to-30 nm.
10. A head-mounted display comprising the display device according to any one of claims 1 to 9.
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| CN202011436403.2A CN112526754A (en) | 2020-12-10 | 2020-12-10 | Display device and head-mounted display |
| PCT/CN2021/111746 WO2022121344A1 (en) | 2020-12-10 | 2021-08-10 | Display device and head-mounted display |
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| CN202011436403.2A CN112526754A (en) | 2020-12-10 | 2020-12-10 | Display device and head-mounted display |
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| CN113485012A (en) * | 2021-06-29 | 2021-10-08 | 京东方科技集团股份有限公司 | Folding light path structure, optical imaging system and virtual reality equipment |
| CN113985615A (en) * | 2021-06-29 | 2022-01-28 | 歌尔股份有限公司 | Imaging modules and head-mounted display devices |
| WO2022068956A1 (en) * | 2020-09-30 | 2022-04-07 | 上海悠睿光学有限公司 | Optical module, near-eye display device, and light projection method |
| WO2022121344A1 (en) * | 2020-12-10 | 2022-06-16 | 深圳惠牛科技有限公司 | Display device and head-mounted display |
| WO2025036326A1 (en) * | 2023-08-14 | 2025-02-20 | 北京字跳网络技术有限公司 | Optical module and manufacturing method therefor, and near-to-eye display device |
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