A 2D / 3D switchable non-polarized light display screen and polarization state conversion device

Abstract

The present invention discloses a 2D / 3D switchable non-polarized light display screen and a polarization state conversion device, comprising a non-polarized light display screen and a polarization state conversion device, wherein the polarization state conversion device is fixed on the light-emitting side of the display panel of the non-polarized light display screen; the polarization state conversion device is provided with two switching units, a first switching unit and a second switching unit, the first switching unit and the second switching unit are arranged at intervals, and the first switching unit and the second switching unit have two states that can be converted to each other, and the two states are respectively an initial state and a 1 / 2 wave plate state. The 2D / 3D switchable non-polarized light display screen of the present invention adds a deflection state conversion device to a non-polarized light display screen such as a Mini LED, and is provided with a switching unit that can make different parts of an image present different polarization states, so that viewers wearing polarized 3D glasses can see 3D images, and can switch back and forth between 2D and 3D displays according to usage needs.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a 2D / 3D switchable non-polarized light display screen and a polarization state conversion device. Background Art

[0002] At present, the 3D display technologies used in cinemas and TVs mainly include naked eye 3D, active shutter 3D and polarized glasses 3D. Among them, although the naked eye 3D technology is low in cost, the effect is poor; the glasses used in active shutter 3D technology are expensive, which will affect the refresh rate of the image and are prone to flicker; polarized glasses 3D is the most widely used due to its low cost and good effect. Mini LED display technology is a newly emerging display technology, which has the advantages of fast response speed, good color reproduction, and brightness range. However, there is currently no 3D technology that can be reliably combined with Mini LED display technology, let alone the switching between 2D and 3D technology. Summary of the invention

[0003] In view of the fact that there is no 2D / 3D switchable display screen in the above-mentioned prior art that can be reliably combined with Mini LED display technology, the present invention provides a 2D / 3D switchable non-polarized light display screen and a polarization state conversion device, and a deflection state conversion device is added to the non-polarized light display screen such as Mini LED. The display image is divided by combining bistable liquid crystal and orientation material, so that the display screen can normally display 2D images under normal conditions. When 3D images need to be displayed, images at different positions have mutually perpendicular polarization states. When polarized 3D glasses are used, viewers can see 3D images.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a 2D / 3D switchable non-polarized light display screen comprises a non-polarized light display screen and a polarization state conversion device, wherein the polarization state conversion device is fixed on the light exit side of a display panel of the non-polarized light display screen; the polarization state conversion device is provided with two switching units, namely a first switching unit and a second switching unit, wherein the first switching unit and the second switching unit are respectively provided with more than two and are spaced apart, and the first switching unit and the second switching unit have two mutually convertible states, wherein the two states are respectively an initial state and a 1 / 2 wave plate state, wherein the image on the non-polarized light display screen observed by the polarization state conversion device in the initial state remains unchanged, and the image on the non-polarized light display screen observed by the polarization state conversion device in the 1 / 2 wave plate state is rotated by 90 degrees, so that the polarization state conversion device has a 2D mode and a 3D mode, wherein in the 2D mode, the first switching unit and the second switching unit are both in the initial state; and in the 3D mode, the first switching unit or the second switching unit is in the 1 / 2 wave plate state.

[0005] The technical solution adopted by the present invention to solve the technical problem further includes:

[0006] A 2D / 3D switchable non-polarized light display screen as described above, wherein the polarization state conversion device comprises a polarizer arranged on the light emitting side of the non-polarized light display screen, a first substrate is provided on the side of the polarizer away from the non-polarized light display screen, a first orientation layer is provided on the side of the first substrate away from the polarizer, a bistable liquid crystal layer is provided on the side of the first orientation layer away from the first substrate, a second orientation layer is provided on the side of the bistable liquid crystal layer away from the first orientation layer, and a second substrate is provided on the side of the second orientation layer away from the bistable liquid crystal layer.

[0007] In the 2D / 3D switchable non-polarized light display as described above, transparent conductive layers for receiving and transmitting signals are respectively provided between the first substrate and the first orientation layer and between the second substrate and the second orientation layer, so that the first switching unit or the second switching unit switches between an initial state and a 1 / 2 wave plate state.

[0008] In the 2D / 3D switchable non-polarized light display screen as described above, the transparent conductive layer is made of metalmesh or ITO.

[0009] In the 2D / 3D switchable non-polarized light display screen as described above, the first substrate and the second substrate are made of an organic transparent film or an inorganic transparent substrate.

[0010] In the 2D / 3D switchable non-polarized light display screen as described above, the first substrate and the second substrate are made of one of COP plastic, PET plastic, PC plastic, soda glass or soda-lime glass.

[0011] In the above-mentioned 2D / 3D switchable non-polarized light display screen, the polarization state conversion device is provided with a phase difference compensation film for compensating the phase difference caused by the substrate material, and the phase difference compensation film is arranged between the first substrate and the second substrate

[0012] In a 2D / 3D switchable non-polarized light display as described above, the switching units on the polarization state conversion device are divided corresponding to pixels on the non-polarized light display, and the division of the switching units corresponds to one or more pixel rows, pixel columns or pixel groups, and the pixel group is composed of more than two fixed numbers of pixels.

[0013] In the 2D / 3D switchable non-polarized light display screen as described above, the polarization state conversion device is connected with the optical glue, and the thickness of the optical glue is less than 5 mm.

[0014] The 2D / 3D switchable non-polarized light display as described above is one of a MiniLED display, a Micro LED display, an OLED display, and a PDP display.

[0015] A 2D / 3D switchable polarization state conversion device is provided, wherein a polarizer is provided on one side of the polarizer, a first substrate is provided on a side of the first substrate away from the polarizer, a bistable liquid crystal layer is provided on a side of the first substrate away from the first substrate, a second orientation layer is provided on a side of the bistable liquid crystal layer away from the first orientation layer, and a second substrate is provided on a side of the second orientation layer away from the bistable liquid crystal layer; two switching units, namely a first switching unit and a second switching unit, are provided on the bistable liquid crystal layer, the first switching unit and the second switching unit are arranged at intervals, the first switching unit and the second switching unit have two states that can be converted to each other, and the two states The polarization states of the image observed by the polarization state conversion device in the initial state remain unchanged, and the polarization state of the image observed by the polarization state conversion device in the polarization state will undergo a 1 / 4 wave plate left-hand rotation, a 1 / 4 wave plate right-hand rotation, or a 1 / 2 wave plate rotation state, so that the polarization state conversion device has a 2D mode and a 3D mode. In the 2D mode, the first switching unit and the second switching unit are both in the initial state, and the image is not polarized; in the 3D mode, one or both of the first switching unit and the second switching unit are in the polarization state, so that the polarization states of the image passing through the first switching unit and the second switching unit are perpendicular to each other, forming an image in the 3D mode.

[0016] The 2D / 3D switchable non-polarized light display screen and polarization state conversion device of the present invention add a deflection state conversion device to a non-polarized light display screen such as Mini LED. The deflection state conversion device is provided with a bistable liquid crystal layer and an orientation layer, and is divided into two different switching units according to display needs, so that the display image switching unit is divided into a plurality of different parts. When displaying 3D images, different switching units can present different polarization states, so that viewers wearing polarized 3D glasses can see 3D images, and can switch back and forth between 2D and 3D displays according to usage needs; since the deflection state conversion device is directly mounted on the non-polarized light display screen, there is no need to make any changes to the structure of the original non-polarized light display screen itself, so the original production technology can be used to save production costs.

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic cross-sectional structure diagram of a preferred embodiment of a 2D / 3D switchable non-polarized light display screen of the present invention;

[0019] Figure 2 A schematic diagram of the distribution of switching units on a polarization state conversion device in a preferred embodiment of a 2D / 3D switchable non-polarized light display screen of the present invention;

[0020] In the figure, 1, non-polarized light display screen, 2, polarization state conversion device, 21, first switching unit, 22, second switching unit, 23, first substrate, 24, polarizer, 25, first orientation layer, 26, bistable liquid crystal layer, 27, second orientation layer, 28, second substrate. DETAILED DESCRIPTION

[0021] This embodiment is a preferred implementation mode of the present invention. All other embodiments whose principles and basic structures are the same or similar to those of this embodiment are within the protection scope of the present invention.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0025] The preferred embodiment of the 2D / 3D switchable non-polarized light display screen of the present invention is shown in FIG. Figure 1-2As shown, it includes a non-polarized light display screen 1 and a polarization state conversion device 2, and the polarization state conversion device 2 is fixed on the light-emitting side of the display panel of the non-polarized light display screen 1. The polarization state conversion device 2 is provided with two switching units, a first switching unit 21 and a second switching unit 22, and the first switching unit 21 and the second switching unit 22 are arranged at intervals. At the same time, the first switching unit 21 and the second switching unit 22 have two states, which are an initial state and a 1 / 2 wave plate state; in the initial state, the image on the non-polarized light display screen 1 observed by the polarization state conversion device 2 remains unchanged, and in the 1 / 2 wave plate state, the image on the non-polarized light display screen 1 observed by the polarization state conversion device 2 rotates 90 degrees, and the polarization state conversion device 2 is provided with an element for controlling the switching state of the first switching unit 21 and the second switching unit 22. Due to the existence of the two states of the first switching unit 21 and the second switching unit 22, the polarization state conversion device 2 has a 2D mode and a 3D mode. When in the 2D mode, the first switching unit 21 and the second switching unit 22 are both in the initial state; when in the 3D mode, the first switching unit 21 or the second switching unit is in the 1 / 2 wave plate state.

[0026] In this embodiment, the polarization state conversion device 2 includes a polarizer 24 arranged on the light emitting side of the non-polarized light display screen 1, a first substrate 23 is provided on the side of the polarizer 24 away from the non-polarized light display screen 1, a first orientation layer 25 is provided on the side of the first substrate 23 away from the polarizer 24, a bistable liquid crystal layer 26 is provided on the side of the first orientation layer 25 away from the first substrate 23, a second orientation layer 27 is provided on the side of the bistable liquid crystal layer 26 away from the first orientation layer 25, and a second substrate 28 is provided on the side of the second orientation layer 27 away from the bistable liquid crystal layer 26.

[0027] In this embodiment, transparent conductive layers for receiving and transmitting signals are respectively provided between the first substrate 23 and the first orientation layer 25 and between the second substrate 28 and the second orientation layer 27. The transparent conductive layers control the first switching unit 21 or the second switching unit 22 to switch between the initial state and the 1 / 2 wave plate state. Different parts are provided on the transparent conductive layer corresponding to the first switching unit 21 and the second switching unit 22. The transparent conductive layer is made of metal mesh or ITO. In this embodiment, the transparent conductive layer is made of ITO.

[0028] In order to ensure that the image can be clearly displayed by the polarization state conversion device 2, the first substrate 23 and the second substrate 28 are made of an organic transparent film or an inorganic transparent substrate. The organic transparent film can be made of one of COP plastic, PET plastic or PC plastic; the inorganic transparent substrate can be one of soda glass or soda-lime glass. In this embodiment, the first substrate 23 is made of PET plastic, and the second substrate 28 is made of soda glass.

[0029] In this embodiment, in order to improve the display effect, a phase difference compensation film is provided on the polarization state conversion device 2 to compensate for the phase difference caused by the substrate material. The phase difference compensation film is arranged between the first substrate 23 and the second substrate 28 .

[0030] The switching units on the polarization state conversion device 2 are divided corresponding to the pixels on the non-polarized light display screen 1. Since the pixels on the non-polarized light display screen 1 are distributed in a matrix, in order to reduce production costs and facilitate the control of the conversion state of the polarization state conversion device 2, the switching units should correspond to one of the pixel rows, pixel columns or pixel groups on the non-polarized light display screen 1 when divided. For example, the area corresponding to the first pixel row and the second pixel row on the polarization state conversion device 2 is a switching unit, which belongs to the first switching unit, and the area corresponding to the third pixel row and the fourth pixel row on the polarization state conversion device 2 is another switching unit, which belongs to the second switching unit. The pixel group is composed of more than two fixed pixels. For example, in this embodiment, nine adjacent pixels are divided into a pixel group to form a rectangular image display area. At the same time, the switching units corresponding to these image display areas are divided on the polarization state conversion device 2, and the adjacent rectangular areas are different types of switching units, so as to obtain the following. Figure 2 The switching unit division shown makes images of different polarization states interlaced, and the 3D display effect is better. In specific implementation, it can also be further divided into alternate rows or columns of images with the same polarization state according to the need of cost control.

[0031] In order to make the image clearer, the polarization state conversion device 2 is connected with the optical glue, and the thickness of the optical glue should be less than 5mm. In this embodiment, the thickness of the optical glue is 0.05mm. In order to reduce the difficulty of production, in the actual production process, if the thickness of the optical glue cannot be reduced to less than 5mm, transparent optical glue is used at the position corresponding to the pixel of the non-polarized light display screen, and black optical glue is used at other positions to avoid light interference.

[0032] In this embodiment, the non-polarized light display screen 1 is a Mini LED display screen. In actual production, the non-polarized light display screen 1 can also be selected from non-polarized light display screens such as a Micro LED display screen, an OLED display screen, and a PDP display screen.

[0033] When it is necessary to watch 3D images, the 3D mode is turned on, and the user wears polarized 3D glasses that match the 2D / 3D switchable non-polarized light display screen of this embodiment. The polarization angle of one lens of the polarized 3D glasses is consistent with the polarization angle of the first switching unit 21, and the polarization angle of the other lens is consistent with the polarization angle of the second switching unit 22, so that one eye of the user sees the image processed by the first switching unit 21, and the other eye of the user sees the image processed by the second switching unit 22. After the combined action of the brain, the user will feel that what is seen is a three-dimensional image.

[0034] The embodiment of the polarization state conversion device capable of 2D / 3D switching of the present invention is shown in FIG. Figure 1 As shown, it is installed on the light-exiting side of the non-polarized light display screen 1, and can make the non-polarized light display screen 1 switch between 2D and 3D modes, including a polarizer 24 arranged on the light-exiting side of the non-polarized light display screen 1, a first substrate 23 is arranged on the side of the polarizer 24 away from the non-polarized light display screen 1, a first orientation layer 25 is arranged on the side of the first substrate 23 away from the polarizer 24, a bistable liquid crystal layer 26 is arranged on the side of the first orientation layer 25 away from the first substrate 23, a second orientation layer 27 is arranged on the side of the bistable liquid crystal layer 26 away from the first orientation layer 25, and a second substrate 28 is arranged on the side of the second orientation layer 27 away from the bistable liquid crystal layer 26. In order to convert the image into the 3D mode, two switching units, a first switching unit 21 and a second switching unit 22, are arranged on the bistable liquid crystal layer 26, and the first switching unit 21 and the second switching unit 22 are arranged at intervals. The first switching unit 21 and the second switching unit 22 have two states that can be converted to each other, which are the initial state and the polarization state. In the initial state, the image observed by the polarization state conversion device 2 remains unchanged. In the polarization state, the polarization state of the image observed by the polarization state conversion device 2 will undergo a 1 / 4 wave plate left rotation, a 1 / 4 wave plate right rotation or a 1 / 2 wave plate rotation state, so that the polarization state conversion device 2 has a 2D mode and a 3D mode. When in the 2D mode, the first switching unit 21 and the second switching unit 22 are both in the initial state, and the image is not polarized; when switched to the 3D mode, one or both of the first switching unit 21 and the second switching unit are in the polarization state, so that the polarization states of the image passing through the first switching unit 21 and the second switching unit 22 are perpendicular to each other, forming a 3D mode image. When installing, the polarization state conversion device of this embodiment is fixed to a non-polarized light display such as a Mini LED display, a Micro LED display, an OLED display and a PDP display using optical glue, so that the image of 2D and 3D modes that can be switched on the existing non-polarized light display can be realized.

[0035] The 2D / 3D switchable non-polarized light display screen and polarization state conversion device of the present invention add a deflection state conversion device to a non-polarized light display screen such as Mini LED. The deflection state conversion device is provided with a bistable liquid crystal layer and an orientation layer, and is divided into two different switching units according to display needs, so that the display image switching unit is divided into a plurality of different parts. When displaying 3D images, different switching units can present different polarization states, so that viewers wearing polarized 3D glasses can see 3D images, and can switch back and forth between 2D and 3D displays according to usage needs; since the deflection state conversion device is directly mounted on the non-polarized light display screen, there is no need to make any changes to the structure of the original non-polarized light display screen itself, so the original production technology can be used to save production costs.

Claims

1. A 2D / 3D switchable display screen, characterized in that: The invention comprises a non-polarized light display screen (1) and a polarization state conversion device (2), wherein the polarization state conversion device (2) is fixed on the light exiting side of a display panel of the non-polarized light display screen (1); the polarization state conversion device (2) is provided with two switching units, namely a first switching unit (21) and a second switching unit (22); the first switching unit (21) and the second switching unit (22) are provided with more than two and are spaced apart; the first switching unit (21) and the second switching unit (22) have two states that can be converted to each other, the two states being an initial state and a polarization state; the non-polarized light display screen (2) observed by the polarization state conversion device (2) in the initial state is 1) the image on the non-polarized light display screen (1) remains unchanged, and the polarization state of the image on the non-polarized light display screen (1) observed through the polarization state conversion device (2) in the polarization state will undergo a 1 / 4 wave plate left rotation, a 1 / 4 wave plate right rotation, or a 1 / 2 wave plate rotation state, so that the polarization state conversion device (2) has a 2D mode and a 3D mode. In the 2D mode, the first switching unit (21) and the second switching unit (22) are both in the initial state, and the image is not polarized; in the 3D mode, one or both of the first switching unit (21) and the second switching unit are in a polarization state, so that the polarization states of the image passing through the first switching unit (21) and the second switching unit (22) are perpendicular to each other, forming an image in a 3D mode; The polarization state conversion device (2) is provided with an element for controlling the switching states of the first switching unit (21) and the second switching unit (22).

2. The 2D / 3D switchable display screen according to claim 1, characterized in that: The polarization state conversion device (2) comprises a polarizer (24) arranged on the light-emitting side of the non-polarized light display screen (1); a first substrate (23) is provided on a side of the polarizer (24) away from the non-polarized light display screen (1); a first orientation layer (25) is provided on a side of the first substrate (23) away from the polarizer (24); a bistable liquid crystal layer (26) is provided on a side of the first orientation layer (25) away from the first substrate (23); a second orientation layer (27) is provided on a side of the bistable liquid crystal layer (26) away from the first orientation layer (25); and a second substrate (28) is provided on a side of the second orientation layer (27) away from the bistable liquid crystal layer (26).

3. The 2D / 3D switchable display screen according to claim 2, characterized in that: A transparent conductive layer for receiving and transmitting signals is provided between the first substrate (23) and the first orientation layer (25) and between the second substrate (28) and the second orientation layer (27), respectively, so that the first switching unit (21) or the second switching unit (22) switches between an initial state and a 1 / 2 wave plate state.

4. The 2D / 3D switchable display screen according to claim 3, characterized in that: The transparent conductive layer is made of metalmesh or ITO.

5. The 2D / 3D switchable display screen according to claim 2, characterized in that: The first substrate (23) and the second substrate (28) are made of an organic transparent film or an inorganic transparent substrate.

6. The 2D / 3D switchable display screen according to claim 2, characterized in that: The first substrate (23) and the second substrate (28) are made of one of COP plastic, PET plastic, PC plastic, soda glass or soda-lime glass.

7. The 2D / 3D switchable display screen according to claim 5, characterized in that: The polarization state conversion device (2) is provided with a phase difference compensation film for compensating for the phase difference caused by the substrate material, and the phase difference compensation film is arranged between the first substrate (23) and the second substrate (28).

8. The 2D / 3D switchable display screen according to claim 1, wherein: The switching units on the polarization state conversion device (2) are divided corresponding to pixels on the non-polarized light display screen (1), and the division of the switching units corresponds to one or more pixel rows, pixel columns or pixel groups, and the pixel group consists of more than two pixels of a fixed number.

9. The 2D / 3D switchable display screen according to claim 1, characterized in that: The non-polarized light display screen (1) is one of a MiniLED display screen, a MicroLED display screen, an OLED display screen, and a PDP display screen.

10. A 2D / 3D switchable polarization state conversion device, characterized in that: A polarizing film (24) is provided, a first substrate (23) is provided on one side of the polarizing film (24), a first orientation layer (25) is provided on the side of the first substrate (23) away from the polarizing film (24), a bistable liquid crystal layer (26) is provided on the side of the first orientation layer (25) away from the first substrate (23), a second orientation layer (27) is provided on the side of the bistable liquid crystal layer (26) away from the first orientation layer (25), and a second substrate (28) is provided on the side of the second orientation layer (27) away from the bistable liquid crystal layer (26); two switching units, a first switching unit (21) and a second switching unit (22), are provided on the bistable liquid crystal layer (26), the first switching unit (21) and the second switching unit (22) are arranged at intervals, and the first switching unit (21) and the second switching unit (22) are arranged at intervals. The device has two states that can be converted to each other, the two states being an initial state and a polarization state. In the initial state, the image observed by the polarization state conversion device (2) remains unchanged. In the polarization state, the polarization state of the image observed by the polarization state conversion device (2) undergoes a 1 / 4 wave plate left rotation, a 1 / 4 wave plate right rotation or a 1 / 2 wave plate rotation state, so that the polarization state conversion device (2) has a 2D mode and a 3D mode. In the 2D mode, the first switching unit (21) and the second switching unit (22) are both in the initial state, and the image is not polarized. In the 3D mode, one or both of the first switching unit (21) and the second switching unit are in a polarization state, so that the polarization states of the image passing through the first switching unit (21) and the second switching unit (22) are perpendicular to each other, forming an image in a 3D mode. The polarization state conversion device (2) is provided with a phase difference compensation film for compensating for the phase difference caused by the substrate material, and the phase difference compensation film is arranged between the first substrate (23) and the second substrate (28).

Images