Dispersion compensation structure and near-eye display device

Abstract

This invention discloses a dispersion compensation structure and a near-eye display device. The dispersion compensation structure includes a phase retardation film and a compensation film, wherein the compensation film is disposed in the incident or outgoing light path of the phase retardation film. The compensation film includes a first compensation film and / or a second compensation film, having a first wavelength range and / or a second wavelength range within the visible light band, wherein the first wavelength range is different from the second wavelength range. Within the first wavelength range, the actual phase retardation of the phase retardation film is greater than its ideal retardation, and the first compensation film satisfies the condition that the actual phase retardation decreases with increasing wavelength within the first wavelength range. Within the second wavelength range, the actual phase retardation of the phase retardation film is less than its ideal retardation, and the second compensation film satisfies the condition that the actual phase retardation increases with increasing wavelength within the second wavelength range. The technical solution of this invention can reduce color cast and stray light generation in the displayed image.

Description

Technical Field

[0001] The present invention relates to the field of optical display technology, and in particular to a dispersion compensation structure and a near-eye display device. Background Art

[0002] In near eye display devices or head mounted display optical systems, polarization elements are usually used, especially in folded optical paths, to control the refraction and reflection of light. However, polarization elements have severe dispersion, which, on the one hand, causes obvious color deviation when the main image color coordinates are compared with the screen. On the other hand, dispersion also causes the delay of commonly used phase delay plates to deviate significantly from the ideal state at most wavelengths, so users will see a color-biased picture when using it. Summary of the invention

[0003] Based on this, in view of the serious dispersion of existing polarization elements, which causes the image viewed by users to be easily colored when using the device, it is necessary to provide a dispersion compensation structure and a near-eye display device to reduce the color cast and stray light in the displayed image.

[0004] To achieve the above object, the present invention provides a dispersion compensation structure, which comprises: a phase retarder and a compensation film, wherein the compensation film is arranged on an incident light path or an outgoing light path of the phase retarder; the compensation film comprises a first compensation film and / or a second compensation film, and has a first wavelength range and / or a second wavelength range within the wavelength range of visible light, wherein the first wavelength range is different from the second wavelength range;

[0005] In the first wavelength range, the actual phase retardation of the phase retarder is greater than its ideal retardation, and the first compensation film satisfies: the actual phase retardation in the first wavelength range decreases with the increase of wavelength;

[0006] In the second wavelength range, the actual phase retardation of the phase retarder is less than its ideal retardation, and the second compensation film satisfies: the actual phase retardation in the second wavelength range increases with the increase of wavelength.

[0007] Optionally, the phase retarder comprises: a quarter wave plate, the first wavelength range includes the blue wavelength of visible light, the second wavelength range includes the red wavelength of visible light, the in-plane phase retardation of the quarter wave plate increases with the increase of wavelength, and the increase of the in-plane phase retardation deviates from the ideal retardation;

[0008] In the blue wavelength range of visible light, the actual in-plane phase retardation of the phase retarder is greater than its ideal retardation;

[0009] In the red wavelength range of visible light, the actual in-plane phase retardation of the phase retarder is smaller than its ideal retardation;

[0010] The optical axis of the first compensation film is perpendicular to the optical axis of the phase retarder, and the optical axis of the second compensation film is parallel to the optical axis of the phase retarder.

[0011] Optionally, the standard in-plane phase retardation of the dispersion compensation structure is Ri, the in-plane phase retardation of the phase retarder within the blue light wavelength range is Re, and the in-plane phase retardation of the first compensation film within the blue light wavelength range is R1, then:

[0012] R1=Re-Ri.

[0013] Optionally, the in-plane phase retardation of the first compensation film in the red light wavelength range is less than 5 nm.

[0014] Optionally, the standard in-plane phase retardation of the dispersion compensation structure is Ri, the in-plane phase retardation of the phase retarder in the red light wavelength range is Re`, and the in-plane phase retardation of the second compensation film in the red light wavelength range is R2, then:

[0015] R2=Ri-Re`.

[0016] Optionally, the in-plane phase retardation of the second compensation film in the blue light wavelength range is less than 5 nm.

[0017] Optionally, the standard in-plane phase retardation of the dispersion compensation structure is Ri, the in-plane phase retardation of the phase retarder within the blue light wavelength range is Re, and the in-plane phase retardation of the first compensation film within the blue light wavelength range is R1, if:

[0018] R1=(Re-Ri) / 2, then two first compensation films are provided, and the two first compensation films are arranged in sequence along the propagation direction of the light.

[0019] Optionally, the standard in-plane phase retardation of the dispersion compensation structure is Ri, the in-plane phase retardation of the phase retarder in the red light wavelength range is Re`, and the in-plane phase retardation of the second compensation film in the red light wavelength range is R2, if:

[0020] R2=(Ri-Re`) / 2, then two second compensation films are provided, and the two second compensation films are arranged along the propagation direction of the light and the optical axes are parallel.

[0021] Optionally, the compensation film includes a first compensation film and a second compensation film;

[0022] The first compensation film is arranged on the light emitting surface of the phase retarder, and the second compensation film is arranged on the side of the first compensation film facing away from the phase retarder;

[0023] Alternatively, the second compensation film is disposed on the light emitting surface of the phase retarder, and the first compensation film is disposed on a side of the second compensation film facing away from the phase retarder.

[0024] In addition, in order to achieve the above-mentioned objectives, the present invention also provides a near-eye display device, which includes a refractive index light path, which includes a plurality of optical elements and a dispersion compensation structure as described above, wherein the dispersion compensation structure is arranged between the plurality of optical elements, and the light of the near-eye display device is refracted and reflected between the dispersion compensation structure and the plurality of optical elements.

[0025] In the technical solution proposed by the present invention, the ideal in-plane phase delay increases with the increase of wavelength, and the relationship between the in-plane phase delay and the wavelength is fixed. In the visible light range, the increase amplitude of the in-plane phase delay of the common phase delay plate is different from the increase amplitude of the ideal in-plane phase delay. In the first wavelength range, the increase amplitude of the in-plane phase delay of the phase delay plate is higher than the ideal in-plane phase delay, and in the second wavelength range, the increase amplitude of the in-plane phase delay of the phase delay plate is lower than the ideal in-plane phase delay. By arranging a compensation film in the incident light path or the outgoing light path of the phase delay plate, the compensation film has the characteristic that the in-plane phase delay decreases with the increase of wavelength in the first wavelength range, thereby making the in-plane phase delay approach to the ideal in-plane phase delay in the first wavelength range. Alternatively, in the second wavelength range, the in-plane phase delay increases with the increase of wavelength, thereby making the in-plane phase delay in the second wavelength range approach to the ideal in-plane phase delay. In this way, adding a dispersion compensation structure to the optical path can make the in-plane phase delay within the corresponding wavelength range close to the ideal in-plane phase delay, so that the corresponding wavelength light can be displayed normally, thereby reducing the color cast and the generation of stray light. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 It is a schematic structural diagram of the dispersion compensation structure of the present invention;

[0028] Figure 2 A schematic diagram of the effect of using the first compensation film of the dispersion compensation structure;

[0029] Figure 3 A schematic diagram showing the effect of using the second compensation film of the dispersion compensation structure;

[0030] Figure 4 Schematic diagram of the effect of using the first compensation film and the second compensation film of the dispersion compensation structure.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] In near eye display devices or head mounted display optical systems, polarization elements are usually used, especially in folded optical paths, to control the refraction and reflection of light. However, polarization elements have severe dispersion, resulting in obvious color deviation when the main image color coordinates are compared with the screen. On the other hand, dispersion also causes the delay of commonly used phase retarders to deviate significantly from the ideal state at most wavelengths, so users will see a color-biased picture when using it.

[0038] To solve the above problems, see Figure 1 As shown, the present invention provides a dispersion compensation structure, which includes: a phase delay plate and a compensation film. After the light passes through the phase delay plate, the polarization state of the light will change. The compensation film is arranged in the incident light path or the outgoing light path of the phase delay plate, and the dispersion of the visible light spectrum is compensated by the compensation film.

[0039] The in-plane phase delay of the phase retarder increases with the increase of wavelength, and the increase of the in-plane phase delay deviates from the ideal delay. This phase retarder is called an abnormal phase retarder. The abnormal phase retarder can make the in-plane phase delay Re have characteristics related to the wavelength in the entire visible light spectrum. It should be noted that the delay characteristics of the phase retarder are caused by the differences in the refractive indices nx, ny, and nz in the three directions of x, y, and z. The delay can be further divided into the in-plane delay Re and the thickness direction delay Rth. The ideal phase retarder should increase with the increase of wavelength and have a fixed relationship with the wavelength. For example, it increases with the increase of wavelength.

[0040] The compensation film is arranged on the light-emitting surface of the phase retarder, and the compensation film includes a first compensation film and / or a second compensation film. It can be seen that there are three situations for the specific film layer design of the compensation film. The first situation is that the compensation film includes a first compensation film, through which, within the first wavelength range, the in-plane phase delay decreases with the increase of the wavelength, so that within the first wavelength range, the in-plane phase delay approaches the ideal in-plane phase delay. The second situation is that the compensation film includes a second compensation film, through which, within the second wavelength range, the in-plane phase delay increases with the increase of the wavelength, so that within the second wavelength range, the in-plane phase delay approaches the ideal in-plane phase delay. The third situation is that the compensation film includes a first compensation film and a second compensation film, and the compensation film compensates for the in-plane phase delay in both the first wavelength range and the second wavelength range.

[0041] See also Figures 2 to 4As shown, the horizontal axis is the wavelength, and the vertical axis is the ratio of the relative in-plane phase delay, which is the ratio of the in-plane phase delay within the visible light wavelength range to the in-plane phase delay at the 550nm position. Figure 2 It can be seen that the ideal in-plane phase delay is a straight line with a fixed slope, and the in-plane phase delay of the abnormal phase retarder is higher than the ideal in-plane phase delay in the first wavelength range, and lower than the ideal in-plane phase delay in the second wavelength range. After the first compensation film is set, the in-plane phase delay of the abnormal phase retarder approaches the ideal in-plane phase delay in the first wavelength range. After the second compensation film is set, the in-plane phase delay of the abnormal phase retarder approaches the ideal in-plane phase delay in the second wavelength range. In the scheme of combining the first compensation film and the second compensation film, it can be seen that the in-plane phase delay in the first wavelength range and the second wavelength range are both close to the ideal in-plane phase delay.

[0042] In the technical solution proposed in this embodiment, under ideal conditions, the in-plane phase delay increases with the increase of wavelength, and the relationship between the in-plane phase delay and the wavelength is fixed. The wavelength determines the ideal delay of the phase delay plate, that is, the ideal delay of the phase delay plate is determined by the wavelength. In the visible light range, the increase amplitude of the in-plane phase delay of the common phase delay plate is different from the increase amplitude of the ideal in-plane phase delay. In the first wavelength range, the increase amplitude of the in-plane phase delay of the phase delay plate is higher than the ideal in-plane phase delay, and in the second wavelength range, the increase amplitude of the in-plane phase delay of the phase delay plate is lower than the ideal in-plane phase delay. By setting the compensation film on the phase delay plate, the compensation film has the characteristic that the in-plane phase delay decreases with the increase of wavelength in the first wavelength range, so that the in-plane phase delay in the first wavelength range is close to the ideal in-plane phase delay. Alternatively, in the second wavelength range, the in-plane phase delay increases with the increase of wavelength, so that the in-plane phase delay in the second wavelength range is close to the ideal in-plane phase delay. In this way, adding a dispersion compensation structure to the optical path can make the in-plane phase delay within the corresponding wavelength range close to the ideal in-plane phase delay, so that the corresponding wavelength light can be displayed normally, thereby reducing the color cast and the generation of stray light.

[0043] In addition, the compensation film can have a transmittance-enhancing effect. When the compensation film is disposed on the surface of the phase retarder opposite to the air, the transmittance of light can be increased. Furthermore, the compensation film has a surface hardening effect. When the compensation film is disposed on the surface of the phase retarder opposite to the air, the surface of the phase retarder can also be protected.

[0044] In the above embodiment of the present application, the phase delay plate includes: a quarter wave plate QWP (Quarterwaveplate), the second wavelength range includes the red wavelength of visible light, and the first wavelength range includes the blue wavelength of visible light. The in-plane phase delay of an ideal quarter wave plate should increase with the increase of wavelength, and the in-plane phase delay is always equal to one-quarter of the wavelength, that is, the relationship between the increase of the oriented phase delay and the corresponding wavelength is fixed. The dispersion characteristics of the quarter wave plate are mainly divided into three categories: the first category is normal dispersion, taking conventional PC (polycarbonate) as an example, its characteristic is that the in-plane delay decreases with the increase of wavelength, mainly because in the resin material, the refractive index difference of the long wavelength band is less than the refractive index difference of the short wavelength band; the second category is uniform delay, its characteristic is that the delay is almost unchanged with the increase of wavelength; the third category is anomalous dispersion, taking modified PC as an example, its characteristic is that the delay increases with the increase of wavelength. In this embodiment, the in-plane phase delay of the quarter wave plate increases with the increase of wavelength, and the increase of the oriented phase delay deviates from the ideal delay. The quarter wave plate in this embodiment is an anomalous quarter wave plate. The quarter wave plate may be a single-layer film, or a composite film formed by two or more phase retardation films, such as a wide-band quarter wave plate formed by combining a half wave plate and a quarter wave plate at a certain angle, in which case the optical axis of the composite quarter wave plate is an equivalent optical axis;

[0045] Specifically, within the blue light wavelength range of visible light, the actual in-plane phase delay of the anomalous quarter wave plate is greater than its ideal delay; within the red light wavelength range of visible light, the actual in-plane phase delay of the anomalous quarter wave plate is less than its ideal delay; the optical axis of the first compensation film is perpendicular to the optical axis of the anomalous quarter wave plate, and the optical axis of the second compensation film is parallel to the optical axis of the anomalous quarter wave plate.

[0046] Specifically, in the yellow-green light range (500nm-590nm), the in-plane phase delay amount conforms to the in-plane phase delay amount characteristics of an ideal quarter-wave plate, but in the blue light wavelength range, the in-plane phase delay amount of the abnormal quarter-wave plate is generally higher than the in-plane phase delay amount of the ideal quarter-wave plate, and in the red light wavelength range, the in-plane phase delay amount of the abnormal quarter-wave plate is generally lower than the in-plane phase delay amount of the ideal quarter-wave plate. The blue light wavelength range is 400nm to 480nm, and the red light wavelength range is 620nm to 760nm. The first compensation film can reduce the increase in the in-plane phase delay amount through the abnormal quarter-wave plate in the wavelength range of 400nm to 480nm, and the second compensation film can increase the increase in the in-plane phase delay amount through the abnormal quarter-wave plate in the wavelength range of 620nm to 760nm.

[0047] In one embodiment of the present application, the standard in-plane phase delay of the dispersion compensation structure is Ri, the in-plane phase delay of the phase delay plate in the blue light wavelength range is Re, and the in-plane phase delay of the first compensation film in the blue light wavelength range is R1, which satisfies: R1 = Re-Ri. In the blue light wavelength range, the increase in the in-plane phase delay Re through the abnormal phase delay plate is relatively high, which is higher than the ideal standard in-plane phase delay Ri, that is, Re is greater than Ri. In order to calculate the accurate in-plane phase delay of the first compensation film in the blue light wavelength range as R1, Re and Ri are processed by difference.

[0048] In one embodiment of the present application, the in-plane phase retardation of the first compensation film in the red light wavelength range is less than 5nm. The first compensation film can produce the effect of reducing the increase in the in-plane phase retardation of polarized light passing through the anomalous phase retarder in the entire blue-green light spectrum range. In order to reduce the in-plane phase retardation in the red light wavelength range from a greater deviation from the standard in-plane phase retardation, the in-plane phase retardation of the first compensation film in the red light wavelength range is controlled to be less than 5nm, and can be further controlled to be less than 2nm.

[0049] In one embodiment of the present application, the standard in-plane phase delay of the dispersion compensation structure is Ri, the in-plane phase delay of the phase delay plate in the red light wavelength range is Re`, and the in-plane phase delay of the second compensation film in the red light wavelength range is R2, which satisfies: R2 = Ri-Re`. In the red light wavelength range, the increase in the in-plane phase delay Re` through the abnormal phase delay plate is low, which is lower than the ideal standard in-plane phase delay Ri, that is, Re` is less than Ri. In order to calculate the accurate in-plane phase delay of the second compensation film in the red light wavelength range as R2, Ri and Re` are processed by difference.

[0050] In one embodiment of the present application, the in-plane phase retardation of the second compensation film in the blue light wavelength range is less than 5nm. The second compensation film can produce the effect of increasing the increase in the in-plane phase retardation of polarized light passing through the anomalous phase retarder in the entire red and green light range. In order to reduce the in-plane phase retardation in the blue light wavelength range from a greater deviation from the standard in-plane phase retardation, the in-plane phase retardation of the second compensation film in the blue light wavelength range is controlled to be less than 5nm, and can be further controlled to be less than 2nm.

[0051] In one embodiment of the present application, the standard in-plane phase retardation of the dispersion compensation structure is Ri, the in-plane phase retardation of the phase retarder in the blue light wavelength range is Re, and the in-plane phase retardation of the first compensation film in the blue light wavelength range is R1, if the following conditions are met:

[0052] R1 = (Re-Ri) / 2, then there are two first compensation films, which are arranged along the propagation direction of the light and with the optical axes parallel. That is to say, the first compensation film can be a single-layer film or a double-layer film. In the case of a double-layer film, the in-plane phase retardation is R1, which is half of the difference between Re and Ri. The specific number of film layers is mainly determined by the numerical value of the in-plane phase retardation.

[0053] In one embodiment of the present application, the standard in-plane phase retardation of the dispersion compensation structure is Ri, the in-plane phase retardation of the phase retarder in the red light wavelength range is Re', and the in-plane phase retardation of the second compensation film in the red light wavelength range is R2, if:

[0054] R2 = (Ri-Re`) / 2, then there are two second compensation films, which are arranged along the propagation direction of the light and with the optical axis parallel. That is to say, the second compensation film can be a single-layer film or a double-layer film. In the case of a double-layer film, the in-plane phase retardation is R2, which is half of the difference between Ri and Re`. The specific number of film layers is mainly determined by the numerical value of the in-plane phase retardation.

[0055] In one embodiment of the present application, the compensation film includes a first compensation film and a second compensation film; the first compensation film is arranged on the light-emitting surface of the phase retarder, and the second compensation film is arranged on the side of the first compensation film facing away from the phase retarder. The light passing through the abnormal phase retarder first passes through the first compensation film and then passes through the second compensation film.

[0056] Alternatively, the second compensation film is disposed on the light-emitting surface of the phase retarder, and the first compensation film is disposed on the side of the second compensation film facing away from the phase retarder. The light passing through the abnormal phase retarder first passes through the second compensation film and then passes through the first compensation film. It can be seen that the position between the first compensation film and the second compensation film can be set arbitrarily, which has greater flexibility when making a dispersion compensation structure.

[0057] The present invention also provides a near-eye display device, which includes a refractive index light path, which includes a plurality of optical elements and a dispersion compensation structure as described above, wherein the dispersion compensation structure is disposed between the plurality of optical elements, and light of the near-eye display device is refracted and reflected between the dispersion compensation structure and the plurality of optical elements.

[0058] In this embodiment, the volume of the near-eye display device can be reduced through the refractive-reflective optical path, and the in-plane phase delay within the corresponding wavelength range can be made close to the ideal in-plane phase delay through the dispersion compensation structure, so that the corresponding wavelength light can be displayed normally, thereby reducing the color cast phenomenon and the generation of stray light.

[0059] Among them, the specific implementation of the near-eye display device can refer to the embodiment of the dispersion compensation structure, which will not be repeated here.

[0060] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A dispersion compensation structure, characterized in that: The dispersion compensation structure comprises: a phase retarder and a compensation film, wherein the compensation film is arranged on an incident light path or an outgoing light path of the phase retarder; the compensation film comprises a first compensation film and / or a second compensation film, and has a first wavelength range and / or a second wavelength range within the wavelength range of visible light, wherein the first wavelength range is different from the second wavelength range; In the first wavelength range, the actual phase retardation of the phase retarder is greater than its ideal retardation, and the first compensation film satisfies: the actual phase retardation in the first wavelength range decreases with the increase of wavelength; In the second wavelength range, the actual phase retardation of the phase retarder is less than its ideal retardation, and the second compensation film satisfies: the actual phase retardation in the second wavelength range increases with the increase of wavelength; The phase retarder comprises: a quarter wave plate, the quarter wave plate is an anomalous quarter wave plate, the first wavelength range includes the blue wavelength of visible light, the second wavelength range includes the red wavelength of visible light, the in-plane phase retardation of the quarter wave plate increases with the increase of wavelength, and the increase of the in-plane phase retardation deviates from the ideal retardation; In the blue wavelength range of visible light, the actual in-plane phase retardation of the phase retarder is greater than its ideal retardation; In the red wavelength range of visible light, the actual in-plane phase retardation of the phase retarder is smaller than its ideal retardation; The optical axis of the first compensation film is perpendicular to the optical axis of the phase retarder, and the optical axis of the second compensation film is parallel to the optical axis of the phase retarder.

2. The dispersion compensation structure according to claim 1, characterized in that: The standard in-plane phase retardation of the dispersion compensation structure is Ri, the in-plane phase retardation of the phase retarder in the blue light wavelength range is Re, and the in-plane phase retardation of the first compensation film in the blue light wavelength range is R1, then: R1=Re-Ri.

3. The dispersion compensation structure according to claim 2, characterized in that: The in-plane phase retardation of the first compensation film in the red light wavelength range is less than 5 nm.

4. The dispersion compensation structure according to claim 1, characterized in that: The standard in-plane phase retardation of the dispersion compensation structure is Ri, the in-plane phase retardation of the phase retarder in the red light wavelength range is Reˋ, and the in-plane phase retardation of the second compensation film in the red light wavelength range is R2, then: R2=Ri-Reˋ.

5. The dispersion compensation structure according to claim 4, characterized in that: The in-plane phase retardation of the second compensation film in the blue light wavelength range is less than 5 nm.

6. The dispersion compensation structure according to claim 1, characterized in that: The standard in-plane phase retardation of the dispersion compensation structure is Ri, the in-plane phase retardation of the phase retarder in the blue light wavelength range is Re, and the in-plane phase retardation of the first compensation film in the blue light wavelength range is R1, if: R1=(Re-Ri) / 2, then two first compensation films are provided, and the two first compensation films are arranged along the propagation direction of the light and the optical axes are parallel.

7. The dispersion compensation structure according to claim 1, characterized in that: The standard in-plane phase retardation of the dispersion compensation structure is Ri, the in-plane phase retardation of the phase retarder in the red light wavelength range is Reˋ, and the in-plane phase retardation of the second compensation film in the red light wavelength range is R2, if: R2 = (Ri-Reˋ) / 2, then two second compensation films are provided, and the two second compensation films are arranged along the propagation direction of the light and the optical axes are parallel.

8. The dispersion compensation structure according to any one of claims 1 to 7, characterized in that: The compensation film includes a first compensation film and a second compensation film; The first compensation film is arranged on the light emitting surface of the phase retarder, and the second compensation film is arranged on the side of the first compensation film facing away from the phase retarder; Alternatively, the second compensation film is disposed on the light emitting surface of the phase retarder, and the first compensation film is disposed on a side of the second compensation film facing away from the phase retarder.

9. A near-eye display device, characterized in that: The near-eye display device includes a refractive-reflective optical path, which includes a plurality of optical elements and a dispersion compensation structure as described in any one of claims 1 to 8, wherein the dispersion compensation structure is arranged between the plurality of optical elements, and the light of the near-eye display device is refracted and reflected between the dispersion compensation structure and the plurality of optical elements.

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