CN115348436B - Stereoscopic image display device capable of reducing grid feeling - Google Patents

Abstract

The invention discloses a stereoscopic image display device capable of reducing grid feeling. The stereoscopic image display device capable of reducing the grid sense comprises a planar display unit, a light source unit arranged on one side of the planar display unit and a lens array unit arranged on the other side of the planar display unit. Wherein the light source provided by the light source unit satisfies the following optical characteristics: the attenuation amplitude of the luminance of the light source before entering the lens array unit is not more than 65% in a divergence angle of a light field system of the stereoscopic image display device, so that the grid feel of the stereoscopic image displayed by the stereoscopic image display device is reduced.

Description

Stereoscopic image display device capable of reducing grid feeling

technical field

The invention relates to a stereoscopic image display device, in particular to a stereoscopic image display device capable of reducing the grid feeling.

Background technique

In the existing stereoscopic image display device, since the central intensity of the lens of the light field system is higher than the edge intensity of the lens, when the human eye watches the stereoscopic image, it will feel the grid feeling G of light and dark contrast (as shown in Figure 1) .

To sum up, the inventor feels that the above-mentioned defects can be improved, Naite devoted himself to research and combined with the application of theories, and finally proposed an invention with reasonable design and effective improvement of the above-mentioned defects.

Contents of the invention

The technical problem to be solved by the present invention is to provide a stereoscopic image display device capable of reducing the sense of grids in view of the deficiencies of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a stereoscopic image display device that can reduce the grid feeling, which includes: a flat display unit, which has a display surface, and the display The surface is configured to display an integrated image (integral image); a light source unit is arranged on one side of the flat display unit, and the light source unit is configured to provide a light source to penetrate the flat display unit to provide The display surface displays the light required for the integrated image; and a lens array unit, which is arranged on the other side of the flat display unit; wherein, the light source provided by the light source unit penetrates the After the plane display unit, it can then pass through the lens array unit, so that the light rays of the integrated image can recombine into a stereo image (stereoimage); wherein, the light source provided by the light source unit satisfies the following optical characteristics : the attenuation range of a luminance of the light source before entering the lens array unit is not more than 65% within a divergence angle of a light field system of the stereoscopic image display device, thereby reducing the lattice of the stereoscopic image Grid effect.

Preferably, the divergent angle of the light field system is defined by the following formula:

sin ^-1 (n_Lens*sin(90-alpha-belta))

Among them, alpha = tan ^-1 ((R-Lens _seq )/(P/2));

in,

in,

in,

Wherein, n_Lens is the lens refractive index in the lens array unit; R is the lens curvature radius in the lens array unit; P is the distance between two adjacent lenses in the lens array unit; L is the length of the plane display unit; W is the plane The width of the display unit; WD is the working distance of the light field system (ie, the vertical distance from the human eye to the display panel); and VA is the viewer's viewing angle.

Wherein, alpha is the angle after the light exits from the lens edge of the lens array unit; belta is the angle before the light exits from the lens edge of the lens array unit; Lens _seq is the lens convex height of the lens array unit; and R_slope is the user's eye to The plane shows the slope of the cell corners.

Preferably, the luminance attenuation amplitude of the light source provided by the light source unit before entering the lens array unit is not greater than within the divergence angle of the light field system of the stereoscopic image display device 50%.

Preferably, the divergence angle of the light field system is positively correlated with the absolute value of the viewing angle of the viewer.

Preferably, the divergence angle of the light field system is positively correlated with the length and the width of the flat display unit.

Preferably, the light source unit is a backlight unit with divergent optical characteristics, and the light source provided by the backlight unit still satisfies the optical characteristics after penetrating through the flat display unit.

Preferably, the stereoscopic image display device further includes: a dielectric coating layer (dielectric film) disposed between the display surface and the lens array unit, and the light source emits light after penetrating the dielectric coating layer Uniformity, adjusted to meet the optical characteristics.

Preferably, within the divergence angle of the light field system, the dielectric coating layer has a first light transmittance for a first incident angle of the light source, and the dielectric coating layer has a first light transmittance for the light source A second incident angle has a second light transmittance; wherein, if the absolute value of the first incident angle is smaller than the absolute value of the second incident angle, the first light transmittance is less than the second transmittance light rate.

Preferably, the light source unit is a backlight unit with divergent optical characteristics; and, the stereoscopic image display device further includes: a lens array unit disposed between the display surface of the plane display unit and the lens array unit A dielectric coating layer, so that the light source provided by the light source unit satisfies the optical characteristics.

Preferably, the light source unit is further defined as a self-luminous light source of an organic light emitting display (Organic Light Emitting Diode Display), and the display surface of the flat display unit is further defined as display pixels of the organic light emitting display.

The beneficial effect of the present invention is that the stereoscopic image display device provided by the present invention can satisfy the following optical characteristics through "the light source provided by the light source unit: a luminance of the light source before entering the lens array unit The attenuation range is not more than 65% within a divergence angle of a light field system of the stereoscopic image display device, so as to effectively improve the grid feeling of the stereoscopic image displayed by the stereoscopic image display device, and effectively Improve the display quality of stereoscopic images.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings related to the present invention. However, the provided drawings are only for reference and description, and are not intended to limit the present invention.

Description of drawings

FIG. 1 is a schematic diagram of a known stereoscopic image with a sense of grid.

FIG. 2 is a schematic perspective view of a stereoscopic image display device according to an embodiment of the present invention.

FIG. 3 is a schematic side view of a stereoscopic image display device according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of a light field system of a stereoscopic image display device according to an embodiment of the present invention.

FIG. 5 is a partially enlarged view of FIG. 4 .

6 is a schematic side view of a stereoscopic image display device including a dielectric coating layer according to another embodiment of the present invention.

Fig. 7 is a schematic diagram of the light waveform of the light source according to the embodiment of the present invention.

FIG. 8 is a schematic diagram of optical characteristics of a dielectric coating layer according to an embodiment of the present invention.

FIG. 9 is a schematic diagram of a light source unit further defined as a self-emitting light source of an organic light emitting display according to an embodiment of the present invention.

Detailed ways

The following is an illustration of the disclosed embodiments of the present invention through specific specific examples, and those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only for simple illustration, and are not drawn according to the actual size, which is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although terms such as "first", "second", and "third" may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" used herein may include any one or a combination of more of the associated listed items depending on the actual situation.

[Stereoscopic image display device]

Referring to FIG. 2 and FIG. 3 , an embodiment of the present invention provides a stereoscopic image display device 100 (stereoscopic image display device). The stereoscopic image display device 100 can be applied in optoelectronic, medical, military, display, display, education, entertainment, consumer electronics and other application fields. The stereoscopic image display device 100 can be, for example, an active floating stereoscopic image display device, which can display a stereoscopic image (stereo image) in the space above the stereoscopic image display device 100 . Furthermore, the stereoscopic image display device 100 may be installed on any suitable installation position such as a desktop, a floor, or a ceiling when in use.

More specifically, the purpose of the embodiments of the present invention is to provide a stereoscopic image display device 100 that can reduce the grid effect, so that a stereo image (stereo image) generated by the stereoscopic image display device 100 during operation ) with good image quality.

In order to achieve the above object, the stereoscopic image display device 100 provided by the embodiment of the present invention includes: a flat panel display unit 1 (flat panel display unit), a lens array unit 2 (lens array unit) and a light source unit 3 (light source unit ).

The flat display unit 1 has a display surface 11 (also referred to as a display pixel), and the display surface 11 is configured to display an integrated image (integral image) for providing the stereoscopic image display device 100 to generate the The image source required for the stereoscopic image.

The light source unit 3 is disposed on one side of the plane display unit 1 . More specifically, the light source unit 3 is arranged on the side of the flat display unit 1 opposite to (or away from) the display surface 11, and the light source unit 3 is configured to provide a light source 31, so that the light source 31 can penetrate the plane display unit 1 , so as to provide the light required by the display surface 11 to display the integrated image.

The lens array unit 2 is disposed on the other side of the plane display unit 1 . More specifically, the lens array unit 2 is arranged on the side of the flat display unit 1 that is the same as (or adjacent to) the display surface 11, and is spaced apart from the flat display unit 1, but the present invention is not limited by limited to this.

In an embodiment of the present invention, the stereoscopic image display device 100 further includes a spacer unit 4 (spacer unit) disposed between the lens array unit 2 and the flat display unit 1, so that the lens array unit 2 and the plane display unit 1 are spaced apart by the spacer unit 4, but the present invention is not limited thereto.

When the stereoscopic image display device 100 is in operation, the display surface 11 of the flat display unit 1 is configured to receive the light source 31 provided by the light source unit 3 to generate the integrated image (integral image), and the The light source 31 can then pass through the lens array unit 2 (as shown in FIG. 4 ), so that the light rays of the integrated image are recombined into a stereo image.

Furthermore, the plane display unit 1 is used to display patterns of integrated photography (integralphotography), and the plane display unit 1 further includes a calculation component (not shown) for executing an algorithm. Furthermore, the integrated image displayed on the display surface 11 of the flat display unit 1 is generated by calculating and redrawing a flat image, but the present invention is not limited thereto.

In some embodiments of the present invention, the display surface 11 of the flat panel display unit 1 may be, for example, display pixels of an active flat panel display. For example, the display surface 11 of the flat display unit 1 can be, for example, display pixels of a smart phone, a display pixel of a tablet computer or a display pixel of a flat screen. The present invention is not limited to the type and structure of the flat panel display unit 1 . The feature of the plane display unit 1 is that it can control the switching of stereoscopic images, so as to achieve the effect of dynamic image display.

In some embodiments of the present invention, the display surface 11 of the flat display unit 1 can also be, for example, a flat pattern of a passive flat panel display, which can only display static patterns and cannot be changed arbitrarily. image screen. For example, the plane display unit 1 may be a device that can only display static patterns, such as a light box drawing device, a photomask drawing device, a printing drawing device, and the like.

Further, the lens array unit 2 has the ability of controlling light field. The lens array unit 2 includes a plurality of condensing lenses 21 , and the plurality of condensing lenses 21 are configured to adjust the light angle of the stereoscopic image, thereby providing users with different angles for viewing the stereoscopic image. In this way, the user can feel the stereoscopic vision of the depth of the stereoscopic image.

In some embodiments of the present invention, each of the condenser lenses 21 is made of a material with good optical properties. For example, the material of the condensing lens 21 is selected from glass (glass), polymethyl methacrylate (poly (methyl methacrylate), PMMA), polycarbonate (polycarbonate, PC) and polyethylene (polyethylene, PE), at least one of the material groups formed, but the present invention is not limited thereto. As long as the material of the condensing lens 21 has a light transmittance and a degree of softness and hardness suitable for forming a lens, it complies with the protection spirit of the present invention and belongs to the protection scope of the present invention.

In some embodiments of the present invention, the lens type of each of the condenser lenses 21 may be, for example, a biconvex lens, a plano-convex lens, or a Fresnel lens with light-gathering ability (or focusing ability).

In some embodiments of the present invention, a plurality of the condenser lenses 21 are arranged on one side of the display surface 11 of the flat display unit 1 . Furthermore, the multiple condensing lenses 21 are arranged in matrix, staggered or random, which is not limited in the present invention.

Further, the spacer unit 4 is a single light-transmissive layer disposed between the flat display unit 1 and the lens array unit 2 or a plurality of light-transmissive layers stacked on each other. The spacer unit 4 can be used to space and support the flat panel display unit 1 and the lens array unit 2 , and the spacer unit 4 can be used to provide light passing therethrough.

It is worth mentioning that the above-mentioned light-transmitting layer may be, for example, a light-transmitting layer with a solid medium (such as OCA glue or glass), but the present invention is not limited thereto. The light-transmitting layer can also be, for example, a light-transmitting layer with a gaseous medium (such as: air or other gases), or, the light-transmitting layer can also be, for example, a light-transmitting layer with a liquid medium, and the present invention is not limited thereto. .

In order to enable the stereoscopic image display device 100 to reduce the grid effect of the stereoscopic image, the light source 31 provided by the light source unit 3 in the embodiment of the present invention satisfies the following optical characteristics: before the light source 31 enters the lens array unit 2 An attenuation amplitude of brightness of , within a divergent angle of a light field system (light field system) of the stereoscopic image display device 100, is not greater than a predetermined range, thereby reducing The grid sense of the stereoscopic image.

More specifically, please refer to FIG. 2 to FIG. 5 together, the divergent angle (divergent angle, DA) in the light field system is defined by the following formula:

sin ^-1 (n_Lens*sin(90-alpha-belta))

where alpha=tan ⁻¹ ((R-Lens _seq )/(P/2)).

in,

in,

in,

Wherein, n_Lens is the lens refractive index (refractive index) in the lens array unit; R is the lens curvature radius (radius of curvature) in the lens array unit; P is the pitch (pitch) between two adjacent lenses in the lens array unit L is the length (length) of the flat display unit; W is the width (width) of the flat display unit; WD is the working distance of the light field system; and VA is the viewer's viewing angle (viewing angle). That is to say, the divergence angle is a function of the lens parameters, the size parameters of the flat display unit and the viewing angle of the viewer, but the present invention is not limited thereto.

In the above formula, alpha is the angle after the light exits from the lens edge of the lens array unit; belta is the angle before the light exits from the lens edge of the lens array unit; Lens _seq is the lens convex height; and R_slope is the user's eye to plane Displays the slope of the corners of the cells.

In a preferred embodiment of the present invention, the attenuation range of the luminance of the light source 31 before entering the lens array unit 2, within the divergence angle of the light field system of the stereoscopic image display device 100, is Not more than 65%. In a particularly preferred embodiment of the present invention, the attenuation range of the luminance of the light source 31 before entering the lens array unit 2, within the divergence angle of the light field system of the stereoscopic image display device 100, is not more than 50%.

In some embodiments of the present invention, the divergence angle of the light field system is preferably between 45 degrees and 90 degrees, and particularly preferably between 60 degrees and 90 degrees. For example, the divergence angle of the light field system is 45 degrees, 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, 85 degrees or 90 degrees, which is based on the lens array unit The lens parameters, the size parameters of the flat display unit and the viewing angle of the viewer vary.

According to the above configuration, the stereoscopic image display device 100 of the embodiment of the present invention can make the light intensity of the light source passing through the center of the lens and the light intensity of the light source passing through the edge of the lens become smoother through a special light source design. That is to say, the light waveforms of the light source 31 (light waveforms 311 - 313 shown in FIG. 7 ) have perfect light source divergence characteristics or wide full width at half maximum (FWHM). Thereby, the stereoscopic image display device 100 of the embodiment of the present invention can be used to display stereoscopic images with low grid feeling or substantially no grid feeling.

It must be noted that the "attenuation amplitude of brightness" mentioned herein can be defined in the following manner: a maximum brightness of the light source 31 within the divergence angle is defined as a first brightness (For example: the luminance of the light source at 0 degrees). A minimum luminance of the light source 31 within the divergence angle is defined as a second luminance (such as: the luminance of the light source at the divergence angle), wherein the attenuation range of the luminance is the first luminance minus the second luminance. The value obtained by dividing the difference between the two luminances by the first luminance, and its unit is represented by %. That is to say, the attenuation range of the luminance is defined by the attenuation range from the maximum luminance to the minimum luminance.

As shown in FIG. 7 , the light waveforms 311 - 314 of the light source 31 are described as follows. It should be noted that FIG. 7 shows the case where the light field system of the stereoscopic image display device is calculated to have a divergence angle of 65 degrees, and the light source 31 with four different light waveforms 311-314 will be described below for light with a divergence angle of 65 degrees. The influence of the field system on the display of stereoscopic image effects (such as: grid sense).

The first light waveform 311 corresponds to a perfect divergent light source with 90 degrees in the embodiment of the present invention, and the luminance attenuation range of the light source with the first light waveform 311 approaches zero within 90 degrees (that is, the attenuation range is not greater than 50 degrees. %). That is to say, the luminance attenuation range of the light source with the first light waveform 311 approaches zero within a divergence angle of 65 degrees. The divergent light source with the first light waveform 311 enables the stereoscopic image display device to display a stereoscopic image with substantially no grid feeling.

The second light waveform 312 corresponds to a perfect divergent light source with 65 degrees in the embodiment of the present invention, and the luminance attenuation range of the light source with the second light waveform 312 approaches zero within a divergence angle of 65 degrees (that is, the attenuation range does not greater than 50%), but the luminance attenuation range drops significantly outside the divergence angle of 65 degrees (that is, the attenuation range is at least greater than 90%). The diverging light source with the second light waveform 312 enables the stereoscopic image display device to display a stereoscopic image with substantially no grid feeling. Moreover, for the light field system with a divergence angle of 65 degrees, the stereoscopic image quality produced by the divergent light source with the second light waveform 312 is the same as that produced by the divergent light source with the first light waveform 311 .

The third light waveform 313 corresponds to a divergent light source whose luminance is greater than 50% within a divergence angle of 65 degrees in the embodiment of the present invention (that is, the attenuation range is not greater than 50%), and the light waveform of this light source has a wider full width at half maximum (ie, the light waveform appears as a semicircle or a semiellipse). The divergent light source with the third light waveform 313 can enable the stereoscopic image display device to display a stereoscopic image with only a slight grid feeling, and the human eyes cannot perceive the grid feeling of the stereoscopic image.

The fourth light waveform 314 corresponds to a divergent light source whose luminance is not greater than 50% within a divergence angle of 65 degrees in the known technology (that is, the attenuation rate is greater than 50%). The light waveform of this light source has a narrow full width at half maximum. A divergent light source whose luminance is not greater than 50% within a divergence angle of 65 degrees will make the stereoscopic image displayed by the stereoscopic image display device have a grid sense of light and dark contrast (as shown in FIG. 1 ).

Overall, the light source having the above-mentioned first light waveform 311 and the light source with the second light waveform 312 can enable the stereoscopic image display device to display a stereoscopic image with substantially no grid feeling. Furthermore, the light source having the above-mentioned third light waveform 313 can enable the stereoscopic image display device to display a stereoscopic image with only a slight grid feeling.

In some embodiments of the present invention, the absolute value of the divergent angle (divergent angle, DA) in the light field system and the viewing angle (viewing angle, VA) presents a positive correlation. That is to say, if the absolute value of the viewing angle is larger, the divergence angle is also larger.

For example, it will be described by taking different viewing angles corresponding to different divergence angles as an example. In a light field system with a flat display unit of 5.5 inches and a working distance of 150 centimeters, if the viewing angle is 30 degrees to 40 degrees, the divergence angle is roughly between 65 degrees and 70 degrees; 10° to 20°, the divergence angle is roughly between 40° and 45°.

In some embodiments of the present invention, the divergence angle in the light field system is positively correlated with the length L and the width W of the flat panel display unit 1 . That is to say, if the size of the flat display unit is larger, the divergence angle is also larger.

For example, it will be described by taking different dimensions of the flat display unit corresponding to different divergence angles as an example. In a light field system with a viewing angle of 30° to 40° and a working distance of 150 cm, if the flat display unit is 5.5 inches, the divergence angle is roughly between 65° and 70°; The unit is 2.89 inches, and the divergence angle is roughly between 52.5 degrees and 57.5 degrees.

In some embodiments of the present invention, the light source unit 3 is a backlight unit with divergent optical characteristics, and the light source provided by the backlight unit still satisfies the requirements after penetrating the flat display unit 1. optical properties. That is to say, the attenuation of the luminance of the light source provided by the backlight unit after penetrating the flat display unit 1 and before entering the lens array unit 2, in the light field system of the stereoscopic image display device 100 In the divergence angle, it is preferably not more than 65% (especially preferably not more than 50%). For example, the backlight unit with divergent optical characteristics may be, for example, the divergent light sources with light waveforms 311 to 313 in FIG. 7 . In this way, the light source 31 provided by the light source unit 3 can improve the grid feeling of the stereoscopic image.

In some embodiments of the present invention, as shown in FIG. 9 , the light source unit is further defined as a self-illuminating light source of an Organic Light Emitting Diode Display (OD), and the flat display unit The display surface is further defined as a display pixel of the organic light emitting display. That is to say, the light source unit and the plane display unit are components on the same device and are defined by the organic light emitting display OD.

In some embodiments of the present invention, as shown in FIG. 6 , the stereoscopic image display device 100 ′ further includes: disposed between the display surface 11 of the plane display unit and the condenser lens 21 of the lens array unit 2 A dielectric coating layer 5 (dielectric film).

The light emitting uniformity of the light source 31 after penetrating the dielectric coating layer 5 can be adjusted to meet the optical characteristics. Wherein, the dielectric coating layer 5 can be disposed on any position of the spacer unit 4 (such as: the upper side, the lower side or the inner side of the spacer unit 4 ), which is not limited by the present invention.

Within the divergence angle of the light field system, the dielectric coating layer 5 has a first light transmittance for a first incident angle of the light source 31, and the dielectric coating layer 5 has a first light transmittance for a first incident angle of the light source. The two incident angles have a second transmittance. As shown in Figure 8, the dielectric coating layer 5 has the following optical properties: if the absolute value of the first incident angle (such as: -10 degrees to 10 degrees) is smaller than the absolute value of the second incident angle (such as: -10 degrees to -20 degrees or 10 degrees to 20 degrees), then the first light transmittance (such as: 30% to 35%) is less than the second light transmittance (such as: 35-50%), but The present invention is not limited thereto.

In some embodiments of the present invention, the stereoscopic image display device 100 may, for example, use the above-mentioned backlight unit with divergent optical properties and the dielectric coating layer 5 at the same time.

More specifically, the stereoscopic image display device also includes: a backlight unit with divergent optical properties and a dielectric disposed between the display surface 11 of the flat display unit 1 and the condensing lens 21 of the lens array unit 2 The coating layer 5, so that the light source 31 provided by the light source unit 3 can meet the optical characteristics through the above-mentioned backlight unit and the dielectric coating layer 5.

[Advantageous Effects of Embodiment]

One of the beneficial effects of the present invention is that the stereoscopic image display device provided by the present invention can satisfy the following optical characteristics through "the light source provided by the light source unit: the attenuation range of a luminance of the light source is In a divergence angle of a light field system of the stereoscopic image display device, the technical solution is not more than 65%", thereby effectively improving the grid feeling of the stereoscopic image displayed by the stereoscopic image display device, and effectively improving the display of the stereoscopic image quality.

The content disclosed above is only a preferred feasible embodiment of the present invention, and does not therefore limit the claims of the present invention, so all equivalent technical changes made by using the description of the present invention and the contents of the accompanying drawings are included in the claims of the present invention Inside.

Claims (10)

1. A stereoscopic image display device that can reduce grid feeling, is characterized in that, said stereoscopic image display device includes: A flat display unit having a display surface configured to display an integrated image; A light source unit, which is arranged on one side of the flat display unit, and the light source unit is configured to provide a light source to penetrate the flat display unit, so as to provide the display surface required for displaying the integrated image light; and A lens array unit, which is arranged on the other side of the plane display unit; wherein, after the light source provided by the light source unit penetrates the plane display unit, it can then penetrate the lens array unit, so as to enabling the light rays of the integrated image to recombine into a stereoscopic image; Wherein, the light source provided by the light source unit satisfies the following optical characteristics: a luminance attenuation range of the light source before entering the lens array unit, a light field system in the stereoscopic image display device Within the divergence angle, not more than 65%, thereby reducing the grid feeling of the stereoscopic image; Wherein, the divergence angle of the light field system is defined by the following formula: sin ^-1 (n_Lens*sin(90-alpha-belta)) in, in, in, in, Wherein, n_Lens is the lens refractive index in the lens array unit; R is the lens curvature radius in the lens array unit; P is the distance between two adjacent lenses in the lens array unit; L is the length of the plane display unit; W is the plane The width of the display unit; WD is the working distance of the light field system; and VA is the viewing angle of the viewer. 2. The stereoscopic image display device capable of reducing grid feeling according to claim 1, wherein alpha is the angle at which light emerges from the edge of the lens of the lens array unit; beta is the angle at which light emerges from the edge of the lens of the lens array unit Lens _seq is the lens convex height of the lens array unit; and R_slope is the slope from the user's eyes to the corner of the flat display unit. 3. The stereoscopic image display device capable of reducing grid feeling according to claim 1, characterized in that, the luminance attenuation range of the light source provided by the light source unit is greater than that of the stereoscopic image display device. The divergence angle of the light field system is not greater than 50%. 4. The stereoscopic image display device according to claim 1, wherein the absolute value of the divergence angle of the light field system and the viewing angle of the viewer is positive. relevant. 5. The stereoscopic image display device capable of reducing grid feeling according to claim 1, wherein the divergence angle of the light field system and the length and the width of the flat display unit all present is positively correlated. 6. The stereoscopic image display device capable of reducing the grid feeling according to claim 1, wherein the light source unit is a backlight unit with divergent optical characteristics, and the light source provided by the backlight unit is After penetrating through the flat display unit, the optical properties are still satisfied. 7. The stereoscopic image display device capable of reducing grid feeling according to claim 1, characterized in that, the stereoscopic image display device further comprises: a dielectric coating disposed between the display surface and the lens array unit layer, and the light emitting uniformity of the light source after penetrating through the dielectric coating layer is adjusted to meet the optical characteristics. 8. The stereoscopic image display device capable of reducing grid feeling according to claim 7, characterized in that, within the divergence angle of the light field system, the dielectric coating layer has a first relative to the light source. The incident angle has a first light transmittance, and the dielectric coating layer has a second light transmittance for a second incident angle of the light source; wherein, if the absolute value of the first incident angle is smaller than the first The absolute value of the two incident angles, the first light transmittance is smaller than the second light transmittance. 9. The stereoscopic image display device capable of reducing the grid feeling according to claim 1, wherein the light source unit is a backlight unit with divergent optical characteristics; and, the stereoscopic image display device further comprises: A dielectric coating layer is provided between the display surface of the plane display unit and the lens array unit, so that the light source provided by the light source unit satisfies the optical characteristics. 10. The stereoscopic image display device capable of reducing grid feeling according to claim 1, wherein the light source unit is further defined as a self-illuminating light source of an organic light-emitting display, and the plane display unit The display surface is further defined as display pixels of the organic light emitting display.