Autostereoscopic display device

Abstract

The present invention relates to an autostereoscopic display device, the display device comprising: a case unit; a frame unit embedded in the case unit; a rear display unit mounted on the frame unit; a front display unit mounted on the frame unit and disposed in front of the rear display unit, and through which light light can penetrate; and a scattering induction unit, disposed between the rear and front display units, for inhibiting occurrence of the moire effect that is due to the interference of same.

Description

Glasses-free stereoscopic display device

[0001] The present invention relates to a glasses-free stereoscopic display device, and more particularly, to a glasses-free stereoscopic display device capable of implementing bright stereoscopic images without using glasses.

[0002] Typically, 3D displays are designed to provide a sense of three-dimensionality through the difference in image quality between the images entering the left eye and the right eye.

[0003] Glasses are required to separate the images received by the left and right eyes. Conventional technologies developed to eliminate the inconvenience of glasses utilize two panels to create a physical space and then create 3D through the differences in the images seen depending on the physical space.

[0004] However, conventionally, the use of two panels results in a decrease in luminance due to a decrease in transmittance. The transmittance of a panel is generally formed at about 3% to 5%, and when two panels are used, the final transmittance is less than 0.3%.

[0005] Even if a backlight unit (BLU) is designed to achieve a display brightness of 10,000 nits, the resulting brightness is less than 30 nits, making commercialization difficult. Furthermore, low transmittance makes the image on the panel behind it difficult to see. Therefore, improvements are needed.

[0006] The background technology of the present invention is disclosed in Korean Patent Publication No. 10-2017-0098077 (published on August 29, 2017, LED stereoscopic afterimage display device and method thereof) and Korean Patent Publication No. 10-2019-0091924 (published on August 7, 2019, layered type volumetric display system using multiple LED bars).

[0007] The present invention has been devised to improve the above-mentioned problems, and its purpose is to provide a glasses-free stereoscopic display device capable of implementing bright stereoscopic images without using glasses.

[0008] A stereoscopic display device according to the present invention comprises: a case part; a frame part built into the case part; a rear display part mounted on the frame part; a front display part mounted on the frame part, positioned in front of the rear display part, and capable of transmitting light; and a scattering inducing part positioned between the rear display part and the front display part, for suppressing occurrence of a moire phenomenon due to interference between the rear display part and the front display part.

[0009] The above front display portion may have a transmittance of 40% or more.

[0010] The above front display units can be arranged in multiple places.

[0011] The above scattering induction unit can be attached to the rear display unit.

[0012] The turbidity ratio of the above spawning induction unit can be 10% to 20%.

[0013] The glasses-free stereoscopic display device according to the present invention may further include: a distance adjusting unit for adjusting the distance between the rear display unit and the front display unit.

[0014] The distance adjustment unit may include an adjustment hole formed in the frame unit; an adjustment protrusion formed in the front display unit or the rear display unit and moved along the adjustment hole; and an adjustment fixing unit that limits movement of the adjustment protrusion.

[0015] The above-mentioned adjusting member is mounted on the case part and its own length can be varied.

[0016] The autostereoscopic display device according to the present invention comprises a front display unit positioned in front of a rear display unit, and a scattering induction unit attached to the rear display unit. This reduces image interference between the rear display unit and the front display unit. Furthermore, the user can perceive a stereoscopic image due to the difference in distance and brightness between the rear display unit and the front display unit.

[0017] FIG. 1 is a schematic perspective view of a stereoscopic display device without glasses according to one embodiment of the present invention.

[0018] FIG. 2 is an exploded perspective view schematically showing a glasses-free stereoscopic display device according to one embodiment of the present invention.

[0019] FIG. 3 is a drawing schematically showing a rear display unit according to one embodiment of the present invention.

[0020] FIG. 4 is a drawing schematically showing a front display unit according to one embodiment of the present invention.

[0021] FIG. 5 is a drawing schematically showing a state in which a plurality of front display units are arranged according to one embodiment of the present invention.

[0022] Figure 6 is a drawing schematically showing a scattering induction unit according to one embodiment of the present invention.

[0023] Figure 7 is a drawing schematically showing a distance control unit according to a first embodiment of the present invention.

[0024] Figure 8 is a drawing schematically showing a distance control unit according to a second embodiment of the present invention.

[0025] Figure 9 is a drawing schematically showing a distance control unit according to a third embodiment of the present invention.

[0026] FIG. 10 is a drawing schematically showing a state in which a stereoscopic screen is implemented through a glasses-free stereoscopic display device according to one embodiment of the present invention.

[0027] Hereinafter, embodiments of a stereoscopic display device according to the present invention will be described with reference to the attached drawings. Throughout this process, the thickness of lines and the sizes of components depicted in the drawings may be exaggerated for clarity and convenience. Furthermore, the terms described below are defined based on their functions in the present invention and may vary depending on the intentions or practices of the user or operator. Therefore, the definitions of these terms should be based on the contents throughout this specification.

[0028] FIG. 1 is a perspective view schematically illustrating a glasses-free stereoscopic display device according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view schematically illustrating a glasses-free stereoscopic display device according to an embodiment of the present invention. Referring to FIGS. 1 and 2, a glasses-free stereoscopic display device (1) according to an embodiment of the present invention includes a case portion (10), a frame portion (20), a rear display portion (30), a front display portion (40), and a scattering induction portion (50).

[0029] The case part (10) can form an exterior. The case part (10) can be assembled with a rear case (11) and a front case (12). The rear case (11) can include a rear plate (111) and a rear side (112) that protrudes forward from an edge of the rear plate (111). The front case (12) can include a front plate (121) and a front side (122) that protrudes rearward from an edge of the front plate (121). The rear side (112) and the front side (122) can be assembled to each other with screws. A front exposure part (123) is formed on the front plate (121) so that a three-dimensional image provided from a rear display part (30) and a front display part (40) arranged inside can be recognized with the naked eye.

[0030] The frame part (20) can be built into the case part (10). A rear display part (30) and a front display part (40) can be mounted on the frame part (20). The frame part (20) can be combined with the case part (10) and support the rear display part (30) and the front display part (40).

[0031] The rear display unit (30) is mounted on the frame unit (20), and the front display unit (40) can also be mounted on the frame unit (20). The front display unit (40) can be positioned in front of the rear display unit (30). The front display unit (40) is capable of transmitting light. The front display unit (40) is in close contact with the front case (12), and the front display unit (40) can be exposed to the outside by the front exposure unit (123).

[0032] The scattering inducing unit (50) is arranged between the rear display unit (30) and the front display unit (40), and can suppress the occurrence of a moire phenomenon due to interference between the rear display unit (30) and the front display unit (40). The scattering inducing unit (50) can scatter some of the light provided from the rear display unit (30). The scattering inducing unit (50) can be mounted on the frame unit (20) or directly attached to the rear display unit (30).

[0033] FIG. 3 is a schematic diagram of a rear display unit according to an embodiment of the present invention. Referring to FIG. 3, the rear display unit (30) according to an embodiment of the present invention may use a conventional LCD panel, LED panel, etc. In addition, various display panels may be used for the rear display unit (30). The rear display unit (30) may provide a background for a three-dimensional image or a distant image. The rear display unit (30) may have a size equal to or larger than the front display unit (40). The rear display unit (30) may have a brightness greater than that of the front display unit (40). The rear display unit (30) may include a rear panel (31) that provides an image, and a rear jig (32) that is coupled to the rear panel (31) and induces coupling with the frame unit (20).

[0034] FIG. 4 is a schematic diagram showing a front display unit according to an embodiment of the present invention, and FIG. 5 is a schematic diagram showing a state in which a plurality of front displays are arranged according to an embodiment of the present invention. Referring to FIGS. 4 and 5, the front display unit (40) may use a transparent OLED panel having a transmittance of 40% or more. Since the front display unit (40) transmits the image of the rear display unit (30), the user can simultaneously recognize the image of the rear display unit (30) and the image of the front display unit (40). In addition to the OLED panel, the front display unit (40) may use various display panels having a transmittance of 40% or more. The front display unit (40) may be arranged in front of the rear display unit (30) with only one front display unit (40), or may be arranged in front of the rear display unit (30). That is, the front display unit (40) may be arranged in front of the rear display unit (30), and another front display unit (40) may be added between them. These can be arranged spaced apart from each other. The front display unit (40) can include a front panel (41) that provides an image, and a front jig (42) that is coupled to the front panel (41) and induces coupling with the frame unit (20).

[0035] Fig. 6 is a schematic diagram of a scattering induction unit according to one embodiment of the present invention. Referring to Fig. 6, a scattering induction unit (50) according to one embodiment of the present invention may be attached to a rear display unit (30). The scattering induction unit (50) may include a scattering film (51) having a film shape, and scattering particles (52) formed of transparent granules and applied to the scattering film (51) to induce scattering.

[0036] The scattering inducing unit (50) can evenly spread light by evenly applying scattering particles (52) to the scattering film (51). The scattering inducing unit (50) can adjust the scattering particles (52) to maintain the clarity of the image provided from the rear display unit (30) so that it can be recognized by the naked eye. The scattering inducing unit (50) can prevent the occurrence of a moire phenomenon due to interference with the front display unit (40) by scattering the image provided from the rear display unit (30).

[0037] The turbidity ratio of the scattering inducing unit (50) may be 10% to 20%. At this time, the turbidity ratio may mean the ratio of the distribution area of ​​the scattering particles (52) to the area of ​​the scattering film (51). If the turbidity ratio of the scattering inducing unit (50) is lower than 10%, the amount of scattering of the image provided from the rear display unit (30) may be low, which may cause interference with the front display unit (40). If the turbidity ratio of the scattering inducing unit (50) is higher than 20%, the clarity of the image provided from the rear display unit (30) may be low, making it difficult to identify the image with the naked eye.

[0038] FIG. 7 is a schematic drawing showing a distance control unit according to a first embodiment of the present invention, FIG. 8 is a schematic drawing showing a distance control unit according to a second embodiment of the present invention, and FIG. 9 is a schematic drawing showing a distance control unit according to a third embodiment of the present invention. The autostereoscopic display device (1) according to one embodiment of the present invention may further include a distance control unit (60). The distance control unit (60) can adjust the gap between the rear display unit (30) and the front display unit (40). The distance control unit (60) according to the first embodiment has a structure in which the position of the rear display unit (30) is variable, and the distance control unit (60) according to the second embodiment has a structure in which the position of the front display unit (40) is variable. The distance control unit (60) according to the third embodiment has a structure in which the position of the rear display unit (30) is variable in real time.

[0039] A distance adjustment unit (60) according to one embodiment of the present invention may include an adjustment hole (61), an adjustment protrusion (62), and an adjustment fixing unit (63).

[0040] The adjustment hole (61) may be formed in the frame portion (20). The adjustment hole (61) may be a long hole formed at the end of the side wall of the frame portion (20). A plurality of adjustment holes (61) may be arranged spaced apart from each other in the vertical direction of the frame portion (20). In the distance adjustment portion (60) according to the first embodiment, the adjustment hole (61) may be formed forward from the rear end of the side wall of the frame portion (20) (see FIG. 7). In the distance adjustment portion (60) according to the second embodiment, the adjustment hole (61) may be formed backward from the front end of the side wall of the frame portion (20) (see FIG. 8).

[0041] The adjusting protrusion (62) is formed on the front display unit (40) or the rear display unit (30) and can be moved along the adjusting hole (61). In the distance adjusting unit (60) according to the first embodiment, the adjusting protrusion (62) is formed on the side wall of the rear jig (32), and the adjusting protrusion (62) can pass through the adjusting hole (61) and be moved in the longitudinal direction of the adjusting hole (61) (see FIG. 7). In the distance adjusting unit (60) according to the second embodiment, the adjusting protrusion (62) is formed on the side wall of the front jig (42), and the adjusting protrusion (62) can pass through the adjusting hole (61) and be moved in the longitudinal direction of the adjusting hole (61) (see FIG. 8).

[0042] The adjusting fixing member (63) can limit the movement of the adjusting protrusion (62). In the distance adjusting member (60) according to the first embodiment and the distance adjusting member (60) according to the second embodiment, the adjusting fixing member (63) is coupled to the frame member (20) to limit the movement of the adjusting protrusion (62) whose position has been adjusted. The adjusting fixing member (63) can be coupled to the adjusting protrusion (62) with a nut and be brought into close contact with the frame member (20). In addition, various fixing means can be applied to the adjusting fixing member (63) to limit the movement of the adjusting protrusion (62) whose position has been adjusted.

[0043] The adjusting fixing part (63) according to the third embodiment is mounted on the case part (10) and its own length can be varied. One or more adjusting fixing parts (63) are mounted on the rear case (11) and can be connected to the back surface of the rear display part (30). The adjusting fixing part (63) can increase or decrease its own length depending on whether power is supplied. As a result, the adjusting protrusion (62) can move along the adjusting hole (61), and the distance between the rear display part (30) and the front display part (40) can be adjusted. The adjusting fixing part (63) is operated by a separate remote control signal, so that the rear display part (30) can be fixed at a desired point.

[0044] FIG. 10 is a schematic diagram showing a state in which a stereoscopic screen is implemented through a glasses-free stereoscopic display device according to one embodiment of the present invention. Referring to FIG. 10, a 32-inch LCD panel with a brightness of 500 nits and a resolution of 1920x1080 is applied to the rear display unit (30). A 30-inch transparent OLED panel with a brightness of 350 nits and a resolution of 1366x768 is applied to the front display unit (40). A film with a turbidity ratio of 10% to 20% is applied to the scattering inducing unit (50) and is attached to the front of the rear display unit (30).

[0045] The rear display unit (30) provides a background image, and the front display unit (40) provides a main image in the shape of a dinosaur. Since the background image of the rear display unit (30) passes through the front display unit (40), the user can view a three-dimensional image in which the main image of the front display unit (40) protrudes more than the background image of the rear display unit (30).

[0046] Meanwhile, a description will be given of a glasses-free stereoscopic display device to which one rear display unit (30) and one front display unit (40) are applied.

[0047] A rear display unit (30) is mounted on the rear of the frame unit (20). The rear display unit (30) is equipped with a 32-inch LCD panel having a brightness of 500 nits and a resolution of 1920x1080. A film-shaped scattering inducing unit (50) having a turbidity ratio of 10% to 20% is attached to the front of the rear display unit (30). At this time, the rear display unit (30) can be mechanically adjusted to 30 to 70 mm by a distance adjusting unit (60), thereby controlling the 3D stereoscopic effect. The brightness value of the rear display unit (30) may be increased.

[0048] A front display unit (40) is mounted on the front of the frame unit (20). The front display unit (40) is positioned in front of the rear display unit (30). The front display unit (40) is equipped with a 30-inch transparent OLED panel having a brightness of 350 nits and a resolution of 1366x768.

[0049] The brightness of the front display unit (40) is 350 nits and the brightness of the rear display unit (30) is 500 nits, but since the transmittance of the front display unit (40), which is a transparent OLED, is 43%, the screen of the rear display unit (30) is implemented with a brightness of approximately 200 nits through the front display unit (40).

[0050] Due to the difference in brightness between the 350 nit screen from the front display (40) and the 200 nit screen from the rear display (30), and the physical distance of 30 to 70 mm, the image on the screen of the front display (40) appears to be right in front, while the image on the screen of the rear display (30) appears to be actually behind. In this way, a three-dimensional effect can be felt due to the difference in brightness and distance between the two screens.

[0051] In addition, the three-dimensional effect can be adjusted by adjusting the distance or brightness. In addition, by configuring the content so that the image displayed on the rear display unit (30) is displayed on the front display unit (40), an effect of the image popping out can be implemented.

[0052] The scattering inducing part (50) attached to the rear display part (30) scatters the rear display part (30) at a set ratio, thereby suppressing interference with the front display part (40), thereby enabling a clear three-dimensional screen to be implemented without the moire phenomenon.

[0053] In addition, a description is given of a glasses-free stereoscopic display device having one rear display unit (30) and two front display units (40).

[0054] A rear display unit (30) is mounted on the rear of the frame unit (20). The rear display unit (30) is equipped with a 32-inch LCD panel having a brightness of 500 nits and a resolution of 1920x1080. A film-shaped scattering inducing unit (50) having a turbidity ratio of 10% to 20% is attached to the front of the rear display unit (30). At this time, the rear display unit (30) can be mechanically adjusted to 30 to 70 mm by a distance adjusting unit (60), thereby controlling the 3D stereoscopic effect. The brightness value of the rear display unit (30) may be increased.

[0055] A front display unit (40) is mounted on the front of the frame unit (20). The front display unit (40) is positioned in front of the rear display unit (30). The front display unit (40) is equipped with a 30-inch transparent OLED panel having a brightness of 350 nits and a resolution of 1366x768.

[0056] The brightness of the front display unit (40) is 350 nits and the brightness of the rear display unit (30) is 500 nits, but since the transmittance of the front display unit (40), which is a transparent OLED, is 43%, the screen of the rear display unit (30) is implemented with a brightness of approximately 200 nits through the front display unit (40).

[0057] The front display unit (40) is composed of two pieces and can be arranged spaced apart from each other. The number of front display units (40) is not limited to two pieces and multiple pieces can be arranged spaced apart from each other. One rear display unit (30) and two front display units (40) can express a three-dimensional effect for three different scenes.

[0058] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent embodiments are possible. Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

Claims

1. Case part; A frame part built into the above case part; A rear display unit mounted on the above frame; A front display unit mounted on the above frame part and positioned in front of the rear display unit and capable of transmitting light; and A glasses-free stereoscopic display device characterized by including a scattering-inducing unit disposed between the rear display unit and the front display unit and suppressing the occurrence of a moire phenomenon due to interference between the rear display unit and the front display unit.

2. In paragraph 1, A glasses-free stereoscopic display device, characterized in that the front display section has a transmittance of 40% or more.

3. In paragraph 1, A glasses-free stereoscopic display device characterized in that the front display sections are arranged in multiple spaced apart manners.

4. In paragraph 1, A glasses-free stereoscopic display device, characterized in that the scattering inducing unit is attached to the rear display unit.

5. In paragraph 1, A glasses-free stereoscopic display device, characterized in that the turbidity ratio of the scattering-inducing section is 10% to 20%.

6. In paragraph 1, A glasses-free stereoscopic display device further comprising a distance adjusting unit for adjusting the distance between the rear display unit and the front display unit.

7. In paragraph 6, the distance adjustment unit An adjustment hole formed in the above frame portion; A control projection formed on the front display portion or the rear display portion and moved along the control hole; and A stereoscopic display device without glasses, characterized by including a control fixing member that limits the movement of the control protrusion.

8. In paragraph 7, A glasses-free stereoscopic display device characterized in that the above-mentioned adjusting member is mounted on the case and its own length is variable.

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