Display device and three-dimensional image display method

Abstract

This application provides a display device and a three-dimensional image display method. The display device includes a backlight module, a display panel, an electrically controlled phase delay device, and a time-division multiplexing control circuit. The time-division multiplexing control circuit is configured to control the display panel to alternately display left-eye parallax images and right-eye parallax images at a preset frequency, and is configured to synchronously control the electrically controlled phase delay device to switch between a first phase delay state and a second phase delay state. This causes the electrically controlled phase delay device to generate a quarter-wavelength positive phase delay in the first phase delay state and a quarter-wavelength negative phase delay in the second phase delay state, thereby converting the linearly polarized light output from the display panel into circularly polarized light with opposite rotation, achieving precise separation of the left and right eye images. The technical solution of this application reduces crosstalk between the left and right eye images and improves the resolution and clarity of the three-dimensional display.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display device and a three-dimensional image display method. Background Technology

[0002] Traditional polarized 3D display technology typically relies on film-type patterned retarder (FPR) technology, which splits the left and right eye images by spatially dividing pixels. Due to this spatial division method, the resolution of 3D displays is lower than that of 2D displays, leading to a decrease in clarity on large screens. Furthermore, traditional polarized 3D display technology struggles to balance crosstalk control between the left and right eye images with the viewing angle, impacting the viewing experience. Additionally, the alignment accuracy of the film-type patterned retarder during bonding to the display panel is difficult to improve, easily resulting in alignment deviations that further affect the 3D display effect.

[0003] Therefore, it is necessary to propose a new technical solution to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this application is to provide a display device and a three-dimensional image display method, which aims to solve the technical problem of large crosstalk between the left and right eye images in existing three-dimensional display technologies.

[0005] This application provides a display device, comprising: a backlight module; a display panel disposed on the light-emitting side of the backlight module, the display panel including a first polarizer, a thin-film transistor array substrate, a first liquid crystal layer, an opposing substrate, and a second polarizer; an electrically controlled phase delay device disposed on the light-emitting side of the display panel, the electrically controlled phase delay device including a first glass substrate, a first transparent electrode, a second liquid crystal layer, a second transparent electrode, and a second glass substrate, the second liquid crystal layer being disposed between the first transparent electrode and the second transparent electrode; and a time-division multiplexing control circuit electrically connected to the display panel and the electrically controlled phase delay device, the time-division multiplexing control circuit being configured to control the display panel to alternately display a left-eye parallax image and a right-eye parallax image at a preset frequency, and being configured to synchronously control the electrically controlled phase delay device to switch between a first phase delay state and a second phase delay state, such that the electrically controlled phase delay device generates a quarter-wavelength positive phase delay in the first phase delay state and a quarter-wavelength negative phase delay in the second phase delay state.

[0006] In the above-mentioned display device, the angle between the polarization direction of the linearly polarized light output by the display panel and the optical axis of the electrically controlled phase delay device is 45 degrees. The electrically controlled phase delay device is configured to convert the linearly polarized light into circularly polarized light with a first rotation direction in the first phase delay state, and to convert the linearly polarized light into circularly polarized light with a second rotation direction in the second phase delay state, wherein the first rotation direction is opposite to the second rotation direction.

[0007] In the above-mentioned display device, the electrically controlled phase delay device further includes a liquid crystal alignment layer, the liquid crystal alignment layer and the second liquid crystal layer are disposed between the first transparent electrode and the second transparent electrode, the second liquid crystal layer is a nematic liquid crystal layer, and the time-division multiplexing control circuit is configured to control the deflection angle of liquid crystal molecules in the second liquid crystal layer by changing the driving voltage applied between the first transparent electrode and the second transparent electrode.

[0008] In the above-mentioned display device, the time-division multiplexing control circuit is configured to control the backlight module to turn off during the data writing process of a frame of image on the display panel, and to control the backlight module to turn on after the data writing of a frame of image on the display panel is completed, and to synchronously control the electronically controlled phase delay device to switch to the first phase delay state or the second phase delay state.

[0009] In the above-mentioned display device, the time-division multiplexing control circuit is configured to control the electrically controlled phase delay device to be in an extinction state during the data writing process of a frame of image on the display panel, and to control the electrically controlled phase delay device to switch to the first phase delay state or the second phase delay state after the data writing of a frame of image on the display panel is completed.

[0010] This application also provides a display device, comprising: a backlight module; a display panel disposed on the light-emitting side of the backlight module, the display panel including a first polarizer, a thin-film transistor array substrate, a first liquid crystal layer, an opposing substrate, and a second polarizer; a liquid crystal polarization conversion device disposed on the light-emitting side of the display panel, the liquid crystal polarization conversion device including a first substrate, a first electrode layer, a third liquid crystal layer, a second electrode layer, and a second substrate, the third liquid crystal layer being disposed between the first electrode layer and the second electrode layer; and a phase retardation film layer disposed on the light-emitting side of the liquid crystal polarization conversion device, the phase retardation film layer having four... A phase delay of one-half a wavelength; and a time-division multiplexing control circuit electrically connected to the display panel and the liquid crystal polarization conversion device, the time-division multiplexing control circuit being configured to control the display panel to alternately display the left-eye parallax image and the right-eye parallax image at a preset frequency, and being configured to control the liquid crystal polarization conversion device to switch between a first polarization conversion state and a second polarization conversion state, such that the liquid crystal polarization conversion device outputs linearly polarized light in a first polarization direction in the first polarization conversion state and outputs linearly polarized light in a second polarization direction in the second polarization conversion state, the first polarization direction and the second polarization direction being orthogonal to each other.

[0011] In the aforementioned display device, the phase retardation film is configured to convert linearly polarized light in the first polarization direction into circularly polarized light in the first rotation direction, and to convert linearly polarized light in the second polarization direction into circularly polarized light in the second rotation direction, wherein the first rotation direction is opposite to the second rotation direction.

[0012] In the above-described display device, the first electrode layer is disposed on the first substrate, the second electrode layer is disposed on the second substrate, and the time-division multiplexing control circuit is configured to control the deflection state of liquid crystal molecules in the third liquid crystal layer by changing the voltage applied between the first electrode layer and the second electrode layer.

[0013] In the above-described display device, the time-division multiplexing control circuit is configured to control the backlight module to turn off during the data writing process of a frame of image on the display panel, and to control the backlight module to turn on and synchronously control the liquid crystal polarization conversion device to switch to the first polarization conversion state or the second polarization conversion state after the data writing of a frame of image on the display panel is completed.

[0014] In the above-described display device, the time-division multiplexing control circuit is configured to control the liquid crystal polarization converter to be in an extinction state during the data writing process of a frame of image on the display panel, and to control the liquid crystal polarization converter to switch to the first polarization conversion state or the second polarization conversion state after the data writing of a frame of image on the display panel is completed.

[0015] This application also provides a three-dimensional image display method, the three-dimensional image display method comprising: providing a light source through a backlight module, the light source being converted into linearly polarized light after passing through a display panel; controlling the display panel to alternately display a left-eye parallax image and a right-eye parallax image at a preset frequency through a time-division multiplexing control circuit; and synchronously controlling an electrically controlled phase delay device to switch between a first phase delay state and a second phase delay state through the time-division multiplexing control circuit, wherein the electrically controlled phase delay device generates a quarter-wavelength positive phase delay in the first phase delay state and generates a quarter-wavelength negative phase delay in the second phase delay state; wherein, when the display panel outputs the left-eye parallax image, the electrically controlled phase delay device outputs circularly polarized light with a first rotation direction, and when the display panel outputs the right-eye parallax image, the electrically controlled phase delay device outputs circularly polarized light with a second rotation direction, the first rotation direction being opposite to the second rotation direction.

[0016] In the above-mentioned three-dimensional image display method, the three-dimensional image display method further includes: controlling the backlight module to turn off during the data writing process of a frame of image on the display panel; and controlling the backlight module to turn on after the display panel completes the data writing of a frame of image and synchronously controlling the electronically controlled phase delay device to switch to the first phase delay state or the second phase delay state.

[0017] In the above-mentioned three-dimensional image display method, the three-dimensional image display method further includes: during the data writing process of a frame of image on the display panel, controlling the electronically controlled phase delay device to be in an extinction state; after the display panel completes the data writing of a frame of image, controlling the electronically controlled phase delay device to switch to the first phase delay state or the second phase delay state.

[0018] This application also provides a three-dimensional image display method, comprising: providing a light source through a backlight module, the light source being converted into linearly polarized light after passing through a display panel; controlling the display panel to alternately display a left-eye parallax image and a right-eye parallax image at a preset frequency through a time-division multiplexing control circuit; synchronously controlling a liquid crystal polarization conversion device to switch between a first polarization conversion state and a second polarization conversion state through the time-division multiplexing control circuit, wherein the liquid crystal polarization conversion device outputs linearly polarized light with a first polarization direction in the first polarization conversion state and outputs linearly polarized light with a second polarization direction in the second polarization conversion state, the first polarization direction and the second polarization direction being orthogonal to each other; and converting the linearly polarized light output by the liquid crystal polarization conversion device into circularly polarized light through a phase retardation film layer, the phase retardation film layer having a quarter-wavelength phase retardation; wherein, when the display panel outputs the left-eye parallax image, the phase retardation film layer outputs circularly polarized light with a first rotation direction, and when the display panel outputs the right-eye parallax image, the phase retardation film layer outputs circularly polarized light with a second rotation direction, the first rotation direction being opposite to the second rotation direction.

[0019] In the above-mentioned three-dimensional image display method, the three-dimensional image display method further includes: controlling the backlight module to turn off during the data writing process of a frame of image on the display panel; and controlling the backlight module to turn on after the display panel completes the data writing of a frame of image and synchronously controlling the liquid crystal polarization conversion device to switch to the first polarization conversion state or the second polarization conversion state.

[0020] In the above-described three-dimensional image display method, the three-dimensional image display method further includes: during the data writing process of a frame of image on the display panel, controlling the liquid crystal polarization conversion device to be in an extinction state; after the display panel completes the data writing of a frame of image, controlling the liquid crystal polarization conversion device to switch to the first polarization conversion state or the second polarization conversion state.

[0021] The display device provided in this application uses an electrically controlled phase delay device on the light-emitting side of the display panel and a time-division multiplexing control circuit to control the display panel to alternately display left-eye and right-eye parallax images at a preset frequency. The electrically controlled phase delay device is simultaneously switched between a first phase delay state and a second phase delay state. This results in a quarter-wavelength positive phase delay in the first phase delay state and a quarter-wavelength negative phase delay in the second phase delay state, converting the linearly polarized light output from the display panel into circularly polarized light with opposite rotation, thus achieving precise separation of the left and right eye images. The electrically controlled phase delay device includes a first glass substrate, a first transparent electrode, a second liquid crystal layer, a second transparent electrode, and a second glass substrate. By changing the driving voltage applied between the first and second transparent electrodes, the deflection angle of the liquid crystal molecules in the second liquid crystal layer is controlled, thereby changing the phase delay amount and achieving rapid switching between a quarter-wavelength positive phase delay and a quarter-wavelength negative phase delay. Because the electronically controlled phase delay device uses a glass substrate, its alignment accuracy when bonded to the display panel is higher than that of the thin-film polarizer phase delay device. This avoids the alignment deviation generated by the thin-film polarizer phase delay device during the bonding process and reduces crosstalk between the left and right eye images.

[0022] The display device provided in this application further utilizes a time-division multiplexing control circuit to control the display panel to alternately display left-eye and right-eye parallax images at a preset frequency by sequentially arranging a liquid crystal polarization conversion device and a phase retardation film layer on the light-emitting side of the display panel. The liquid crystal polarization conversion device is simultaneously controlled to switch between a first polarization conversion state and a second polarization conversion state, so that the liquid crystal polarization conversion device outputs linearly polarized light in a first polarization direction in the first polarization conversion state and linearly polarized light in a second polarization direction in the second polarization conversion state, with the first and second polarization directions being orthogonal to each other. The linearly polarized light output by the liquid crystal polarization conversion device is converted into circularly polarized light with opposite rotation after passing through a phase retardation film layer with a quarter-wavelength phase retardation, achieving precise separation of the left and right eye images. The liquid crystal polarization conversion device includes a first substrate, a first electrode layer, a third liquid crystal layer, a second electrode layer, and a second substrate. By changing the voltage applied between the first and second electrode layers, the deflection state of the liquid crystal molecules in the third liquid crystal layer is controlled, achieving rapid switching between linearly polarized light in the first and second polarization directions, reducing crosstalk between the left and right eye images.

[0023] The three-dimensional image display method provided in this application controls the backlight module to turn off, or controls the electronically controlled phase delay device to be in an extinction state, or controls the liquid crystal polarization conversion device to be in an extinction state during the data writing process of a frame of image on the display panel using a time-division multiplexing control circuit. This avoids the aliasing of the left and right eye images caused by the coexistence of the previous and next frames during the line-by-line scanning and writing of image data on the display panel, further reducing crosstalk between the left and right eye images. After the display panel completes the data writing of a frame of image (at this time during the blanking period), the time-division multiplexing control circuit controls the backlight module to turn on and synchronously controls the electronically controlled phase delay device to switch to the first phase delay state or the second phase delay state, or synchronously controls the liquid crystal polarization conversion device to switch to the first polarization conversion state or the second polarization conversion state. This achieves precise synchronization between the backlight turning on time and the phase delay state or polarization conversion state, avoiding frame synchronization deviation.

[0024] The technical solution of this application uses time-division multiplexing to alternately display the left-eye parallax image and the right-eye parallax image, avoiding the resolution reduction problem caused by the traditional polarized 3D display technology's spatial pixel segmentation for left-eye image splitting. This ensures that the resolution of the 3D display remains consistent with that of the 2D display, improving the clarity of the 3D display. The time-division multiplexing control circuit controls the synchronous operation of the display panel and the electronically controlled phase delay device or liquid crystal polarization converter, achieving precise synchronization between the parallax image output by the display panel and the state switching of the electronically controlled phase delay device or liquid crystal polarization converter, thus improving the stereoscopic effect of the 3D display. Attached Figure Description

[0025] Figure 1 This is a block diagram of a display device provided in an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of a first embodiment of the display device of this application.

[0027] Figure 3 for Figure 2 A schematic diagram of the display panel in the display device shown.

[0028] Figure 4 for Figure 2 A schematic diagram of the electrically controlled phase delay device in the display device shown.

[0029] Figure 5 for Figure 2 The diagram shows the operating mode of the display device.

[0030] Figure 6 This is a schematic diagram of a second embodiment of the display device of this application.

[0031] Figure 7 for Figure 6A schematic diagram of the liquid crystal polarization converter in the display device shown.

[0032] Figure 8 for Figure 6 The diagram shows the operating mode of the display device. Detailed Implementation

[0033] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0034] The terms “first,” “second,” and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms “multiple,” and similar words mean two or more, unless otherwise expressly specified.

[0035] The technical solutions of different embodiments of this application can be combined with each other.

[0036] The display device provided in this application is based on time-division multiplexing technology. By setting an electrically controlled phase delay device 105 or a liquid crystal polarization converter 107 on the light-emitting side of the display panel 102, and cooperating with the synchronous control of the time-division multiplexing control circuit 106, it achieves precise separation of left and right eye parallax images and high-resolution three-dimensional display. The technical solution of this application uses a time-dimensional image segmentation method instead of the traditional spatial-dimensional pixel segmentation method, avoiding the resolution reduction problem caused by spatial pixel segmentation in traditional polarized three-dimensional display technology, so that the resolution of the three-dimensional display is consistent with the resolution of the two-dimensional display.

[0037] like Figure 2 and Figure 6 As shown, the display device of this application includes a backlight module 104, a display panel 102, a dynamic optical modulation component, and a time-division multiplexing control circuit 106. The backlight module 104 provides an unpolarized light source. The display panel 102 is disposed on the light-emitting side of the backlight module 104. The display panel 102 includes a first polarizer 1025, a thin-film transistor array substrate 1026, a first liquid crystal layer 1027, an opposing substrate 1028, and a second polarizer 1029. The display panel 102 generates and outputs linearly polarized light carrying image information according to a driving signal. The dynamic optical modulation component is disposed on the light-emitting side of the display panel 102. The dynamic optical modulation component performs phase modulation or polarization modulation on the linearly polarized light output by the display panel 102, converting the linearly polarized light into circularly polarized light with opposite rotation. The time-division multiplexing control circuit 106 is electrically connected to the backlight module 104, the display panel 102 and the dynamic optical modulation component. The time-division multiplexing control circuit 106 controls the display panel 102 to alternately display the left-eye parallax image and the right-eye parallax image at a preset frequency, and synchronously controls the dynamic optical modulation component to switch states, so as to achieve precise separation of the left and right eye images.

[0038] Depending on the specific form of the dynamic optical modulation component, this application provides two implementation schemes. For example... Figure 2 As shown, in the first embodiment, the dynamic optical modulation component includes an electrically controlled phase delay device 105. Under the control of the time-division multiplexing control circuit 106, the electrically controlled phase delay device 105 switches between a first phase delay state and a second phase delay state. In the first phase delay state, it generates a quarter-wavelength positive phase delay, and in the second phase delay state, it generates a quarter-wavelength negative phase delay, thereby converting the linearly polarized light output from the display panel 102 into circularly polarized light with opposite rotation. Figure 6 As shown, in the second embodiment, the dynamic optical modulation component includes a liquid crystal polarization conversion device 107 and a phase retardation film 108. The liquid crystal polarization conversion device 107 switches between a first polarization conversion state and a second polarization conversion state under the control of the time-division multiplexing control circuit 106. In the first polarization conversion state, it outputs linearly polarized light with a first polarization direction, and in the second polarization conversion state, it outputs linearly polarized light with a second polarization direction. The first polarization direction and the second polarization direction are orthogonal to each other. The phase retardation film 108 is disposed on the light-emitting side of the liquid crystal polarization conversion device 107. The phase retardation film 108 has a quarter-wavelength phase retardation. The phase retardation film 108 converts the linearly polarized light with different polarization directions output by the liquid crystal polarization conversion device 107 into circularly polarized light with opposite rotation directions.

[0039] Example 1 like Figure 2 As shown, the display device provided in this embodiment includes a backlight module 104, a display panel 102, an electrically controlled phase delay device 105, and a time-division multiplexing control circuit 106.

[0040] The backlight module 104 provides an unpolarized light source. The unpolarized light output from the backlight module 104 propagates along the optical path to the display panel 102. The backlight module 104 is turned on and off under the control of the time-division multiplexing control circuit 106 to coordinate with the image data writing process of the display panel 102 and the state switching process of the electrically controlled phase delay device 105, avoiding crosstalk between the left and right eye images. The backlight module 104 includes a light source, a light guide plate, a reflector, a diffuser, and a brightness enhancement film. The light emitted from the light source is uniformly distributed by the light guide plate and then passes sequentially through the reflector, diffuser, and brightness enhancement film to form a uniform surface light source output to the display panel 102.

[0041] The display panel 102 is located on the light-emitting side of the backlight module 104. For example... Figure 1 and Figure 3As shown, the display panel 102 is a liquid crystal display panel, which includes a first polarizer 1025, a thin-film transistor array substrate 1026, a first liquid crystal layer 1027, an opposing substrate 1028, and a second polarizer 1029. The first polarizer 1025 is disposed on the backlight incident side of the thin-film transistor array substrate 1026, and converts the unpolarized light output from the backlight module 104 into first linearly polarized light. The thin-film transistor array substrate 1026 is disposed on the light emitting side of the first polarizer 1025, and includes multiple thin-film transistors, multiple data lines 1023, multiple gate lines 1022, and multiple pixels 1024. Each pixel 1024 corresponds to one thin-film transistor. The gate of the thin-film transistor is connected to the gate line 1022, the source of the thin-film transistor is connected to the data line 1023, and the drain of the thin-film transistor is connected to the pixel electrode. The thin-film transistor array substrate 1026 applies a driving voltage to the liquid crystal molecules in the first liquid crystal layer 1027 through the thin-film transistors. The thin-film transistor array substrate 1026 also includes a gate driving circuit 1021, which is connected to multiple gate lines 1022. The gate driving circuit 1021 outputs scanning signals to the multiple gate lines 1022 line by line to realize line-by-line scanning drive.

[0042] The liquid crystal display panel 102 is also connected to a timing controller 101 and a source driver chip 103. The timing controller 101 receives externally input image data and timing control signals. The timing controller 101 converts the image data into driving data for the source driver chip 103 and generates control signals for the gate driver circuit 1021. The source driver chip 103 is connected to multiple data lines 1023. The source driver chip 103 outputs data voltage signals to the multiple data lines 1023 according to the driving data provided by the timing controller 101. The gate driver circuit 1021 outputs scan signals line by line to the multiple gate lines 1022 according to the control signals provided by the timing controller 101. The thin-film transistors are turned on under the control of the scan signals. The data voltage signals on the data lines 1023 are written into the pixels 1024 through the turned-on thin-film transistors, driving the liquid crystal molecules in the first liquid crystal layer 1027 to deflect.

[0043] A first liquid crystal layer 1027 is disposed between a thin-film transistor array substrate 1026 and a counter substrate 1028. Liquid crystal molecules in the first liquid crystal layer 1027 are deflected under a driving voltage, modulating the phase of linearly polarized light passing through the first liquid crystal layer 1027 to achieve brightness modulation of the image. The counter substrate 1028 is disposed on the light-emitting side of the first liquid crystal layer 1027 and includes a color filter. The color filter includes red, green, and blue sub-pixels. The color filter modulates the color of the linearly polarized light passing through the first liquid crystal layer 1027 to achieve full-color image display. Alternatively, the color filter can be disposed in the thin-film transistor array substrate 1026 instead of the counter substrate 1028. The second polarizer 1029 is disposed on the light-emitting side of the opposing substrate 1028. The light transmission axis of the second polarizer 1029 is orthogonal or parallel to the light transmission axis of the first polarizer 1025. The second polarizer 1029 converts the light modulated by the first liquid crystal layer 1027 and the color filter into second linearly polarized light carrying image information and outputs it.

[0044] Under the control of the time-division multiplexing control circuit 106, the display panel 102 alternately displays the left-eye parallax image and the right-eye parallax image at a preset frequency. The preset frequency is 120 Hz or higher, which is higher than the visual persistence frequency of the human eye, making it impossible for the human eye to perceive the alternation of the left and right eye parallax images, thus fusing them in the brain to form a continuous three-dimensional image. Figure 5As shown, during the first time period, the timing controller 101 sends the data of the left-eye parallax image to the source driver chip 103. The source driver chip 103 converts the data of the left-eye parallax image into a data voltage signal and outputs it to the data line 1023. The gate driver circuit 1021 outputs a scan signal to the gate line 1022 line by line. The thin film transistor is turned on line by line under the control of the scan signal. The data voltage signal on the data line 1023 is written to the pixel 1024 line by line. The liquid crystal molecules in the first liquid crystal layer 1027 are deflected according to the data of the left-eye parallax image, and the linearly polarized light passing through the first liquid crystal layer 1027 is phase modulated. After passing through the color filter and the second polarizer 1029 of the opposing substrate 1028, the linearly polarized light carrying the information of the left-eye parallax image is output. During the second time period, the timing controller 101 sends the right-eye parallax image data to the source driver chip 103. The source driver chip 103 converts the right-eye parallax image data into a data voltage signal and outputs it to the data line 1023. The gate driver circuit 1021 outputs a scan signal to the gate line 1022 line by line. The thin-film transistor is turned on line by line under the control of the scan signal. The data voltage signal on the data line 1023 is written to the pixel 1024 line by line. The liquid crystal molecules in the first liquid crystal layer 1027 are deflected according to the right-eye parallax image data. The linearly polarized light passing through the first liquid crystal layer 1027 is phase modulated. After passing through the color filter and the second polarizer 1029 of the opposing substrate 1028, the linearly polarized light carrying the right-eye parallax image information is output.

[0045] An electrically controlled phase delay device 105 is disposed on the light-emitting side of the display panel 102. For example... Figure 4 As shown, the electrically controlled phase delay device 105 includes a first glass substrate 1051, a first transparent electrode 1052, a liquid crystal alignment layer, a second liquid crystal layer 1053, a second transparent electrode 1054, and a second glass substrate 1055. The first glass substrate 1051 is disposed on the side of the electrically controlled phase delay device 105 near the display panel 102. The first transparent electrode 1052 is disposed on the light-emitting side surface of the first glass substrate 1051, and the first transparent electrode 1052 and the second transparent electrode 1054 are indium tin oxide transparent electrodes. The liquid crystal alignment layer is disposed on the light-emitting side surface of the first transparent electrode 1052 and on the incident side surface of the second transparent electrode 1054. The liquid crystal alignment layer aligns the liquid crystal molecules in the second liquid crystal layer 1053 so that the liquid crystal molecules in the second liquid crystal layer 1053 are aligned in a specific direction when no driving voltage is applied. The angle between the alignment direction of the liquid crystal alignment layer and the polarization direction of the linearly polarized light output from the display panel 102 is 45 degrees, so that the linearly polarized light can be converted into circularly polarized light when passing through the second liquid crystal layer 1053.

[0046] A second liquid crystal layer 1053 is disposed between the liquid crystal alignment layers. The second liquid crystal layer 1053 is a nematic liquid crystal layer. Under the action of a driving voltage, the liquid crystal molecules in the second liquid crystal layer 1053 are deflected, causing an optical path difference between the ordinary ray (o-ray: light that follows the ordinary law of refraction when passing through an anisotropic crystal) and the extraordinary ray (e-ray: light that does not follow the ordinary law of refraction when passing through anisotropic crystal) of the linearly polarized light passing through the second liquid crystal layer 1053, thereby achieving phase retardation. A second transparent electrode 1054 is disposed on the light-emitting side surface of the liquid crystal alignment layer on the light-emitting side of the second liquid crystal layer 1053. The second transparent electrode 1054 cooperates with the first transparent electrode 1052 to apply a driving voltage to the second liquid crystal layer 1053. A second glass substrate 1055 is disposed on the light-emitting side of the second transparent electrode 1054.

[0047] like Figure 5 As shown, the electrically controlled phase delay device 105 switches between a first phase delay state and a second phase delay state under the control of the time-division multiplexing control circuit 106. In the first phase delay state, the time-division multiplexing control circuit 106 applies a first driving voltage to the second liquid crystal layer 1053 through the first transparent electrode 1052 and the second transparent electrode 1054. Under the action of the first driving voltage, the liquid crystal molecules in the second liquid crystal layer 1053 deflect to a first tilt angle, so that a quarter-wavelength positive phase delay is generated between the ordinary and extraordinary light of the linearly polarized light passing through the second liquid crystal layer 1053. The electrically controlled phase delay device 105 converts the linearly polarized light output from the display panel 102 into circularly polarized light with a first rotation direction. In the second phase delay state, the time-division multiplexing control circuit 106 applies a second driving voltage to the second liquid crystal layer 1053 through the first transparent electrode 1052 and the second transparent electrode 1054. Under the action of the second driving voltage, the liquid crystal molecules in the second liquid crystal layer 1053 deflect to a second tilt angle, resulting in a quarter-wavelength negative phase delay between the ordinary and extraordinary light of the linearly polarized light passing through the second liquid crystal layer 1053. The electrically controlled phase delay device 105 converts the linearly polarized light output from the display panel 102 into circularly polarized light with a second rotation direction. The angle between the polarization direction of the linearly polarized light output from the display panel 102 and the optical axis of the electrically controlled phase delay device 105 is 45 degrees. In the first phase delay state, the electrically controlled phase delay device 105 converts the linearly polarized light into circularly polarized light with a first rotation direction, and in the second phase delay state, it converts the linearly polarized light into circularly polarized light with a second rotation direction. The first rotation direction is opposite to the second rotation direction; the first rotation direction is right-handed circularly polarized light, and the second rotation direction is left-handed circularly polarized light, or the first rotation direction is left-handed circularly polarized light, and the second rotation direction is right-handed circularly polarized light.

[0048] The time-division multiplexing control circuit 106 is electrically connected to the backlight module 104, the display panel 102, and the electrically controlled phase delay device 105. The time-division multiplexing control circuit 106 is configured to control the display panel 102 to alternately display the left-eye parallax image and the right-eye parallax image at a preset frequency, and is configured to synchronously control the electrically controlled phase delay device 105 to switch between a first phase delay state and a second phase delay state. The time-division multiplexing control circuit 106 is configured to control the deflection angle of liquid crystal molecules in the second liquid crystal layer 1053 by changing the driving voltage applied between the first transparent electrode 1052 and the second transparent electrode 1054.

[0049] The operation of the display device in this embodiment is as follows. Figure 5 As shown, during the first time period, the time-division multiplexing control circuit 106 controls the display panel 102 to output the left-eye parallax image. The timing controller 101 sends the left-eye parallax image data to the source driver chip 103. The source driver chip 103 and the gate driver circuit 1021 cooperate to write the left-eye parallax image data line by line through the data line 1023 and the gate line 1022. The liquid crystal molecules in the first liquid crystal layer 1027 are deflected according to the left-eye parallax image data. After passing through the second polarizer 1029, linearly polarized light carrying the left-eye parallax image information is output. The time-division multiplexing control circuit 106 synchronously controls the electronically controlled phase delay device 105 to switch to the first phase delay state. The electronically controlled phase delay device 105 converts the linearly polarized light output from the display panel 102 into circularly polarized light with a first rotation direction and outputs it. The circularly polarized light with the first rotation direction passes through the left-eye channel of the circularly polarized 3D glasses worn by the viewer and is received by the viewer's left eye, thus receiving the left-eye parallax image. During the second time period, the time-division multiplexing control circuit 106 controls the display panel 102 to output the right-eye parallax image. The timing controller 101 sends the right-eye parallax image data to the source driver chip 103. The source driver chip 103 and the gate driver circuit 1021 cooperate to write the right-eye parallax image data line by line through the data line 1023 and the gate line 1022. The liquid crystal molecules in the first liquid crystal layer 1027 are deflected according to the right-eye parallax image data. After passing through the second polarizer 1029, linearly polarized light carrying the right-eye parallax image information is output. The time-division multiplexing control circuit 106 synchronously controls the electronically controlled phase delay device 105 to switch to the second phase delay state. The electronically controlled phase delay device 105 converts the linearly polarized light output from the display panel 102 into circularly polarized light with a second rotation direction and outputs it. The circularly polarized light with the second rotation direction passes through the right-eye channel of the circularly polarized 3D glasses and is received by the viewer's right eye, thus receiving the right-eye parallax image. Through the time-division multiplexing method described above, the viewer's left and right eyes receive left-eye parallax images and right-eye parallax images with parallax respectively, which are then fused in the brain to form a three-dimensional image.

[0050] Since the display panel 102 writes image data using a line-by-line scanning method, the previous frame and the next frame will exist simultaneously on the display panel 102 during the screen refresh. If the electronically controlled phase delay device 105 switches states or the backlight module 104 is turned on during this period, it will cause aliasing of the left and right eye images, resulting in crosstalk. To avoid the above problem, the time-division multiplexing control circuit 106 is configured to control the backlight module 104 to turn off during the data writing process of one frame of image on the display panel 102, and to control the backlight module 104 to turn on after the display panel completes the data writing of one frame of image (at which time it is in the blanking period) and simultaneously control the electronically controlled phase delay device 105 to switch to the first phase delay state or the second phase delay state. Alternatively, the time-division multiplexing control circuit 106 is configured to control the electrically controlled phase delay device 105 to be in an extinction state during the data writing process of a frame of image on the display panel 102, and to control the electrically controlled phase delay device 105 to switch to a first phase delay state or a second phase delay state after the display panel 102 has completed the data writing of a frame of image (at which time it is in the blanking period). During the process of writing a frame of image data line by line on the display panel 102, the time-division multiplexing control circuit 106 controls the backlight module 104 to be turned off, or controls the electrically controlled phase delay device 105 to be in an extinction state. After the display panel 102 has completed the writing of a frame of image data and the liquid crystal molecules in the first liquid crystal layer 1027 have been deflected into place, the time-division multiplexing control circuit 106 controls the backlight module 104 to be turned on, and simultaneously controls the electrically controlled phase delay device 105 to switch to the first phase delay state or the second phase delay state. By controlling the turn-on time of the backlight module 104 and the state switching time of the electronically controlled phase delay device 105, the aliasing of the left and right eye images during the screen refresh of the display panel 102 is avoided, and the crosstalk between the left and right eye images is reduced.

[0051] In this embodiment, the electrically controlled phase delay device 105 uses a glass substrate. Compared with traditional thin-film polarizer phase delayers, the glass substrate has higher flatness and dimensional stability, resulting in higher alignment accuracy when bonded to the display panel 102. This avoids alignment deviations caused by stress deformation during the bonding process of the thin-film polarizer phase delayer, reducing crosstalk between the left and right eye images. Furthermore, the electrically controlled phase delay device 105 dynamically switches the phase delay amount by changing the driving voltage, resulting in fast response speed and high switching accuracy, further reducing crosstalk between the left and right eye images.

[0052] In this embodiment, the time-division multiplexing control circuit 106 adaptively adjusts the switching frequency of the electronically controlled phase delay device 105 according to the refresh rate of the display panel 102. When the refresh rate of the display panel 102 is 120Hz, the time-division multiplexing control circuit 106 controls the display panel 102 to display the left-eye parallax image at a frequency of 60Hz and the right-eye parallax image at a frequency of 60Hz, and simultaneously controls the electronically controlled phase delay device 105 to switch between the first phase delay state and the second phase delay state at a frequency of 60Hz. When the refresh rate of the display panel 102 is 240Hz, the time-division multiplexing control circuit 106 controls the display panel 102 to display the left-eye parallax image at a frequency of 120Hz and the right-eye parallax image at a frequency of 120Hz, and simultaneously controls the electronically controlled phase delay device 105 to switch between the first phase delay state and the second phase delay state at a frequency of 120Hz. By adaptively adjusting the switching frequency according to the refresh rate of the display panel 102, a balance between resolution and display smoothness is achieved.

[0053] Example 2 like Figure 6 As shown, the display device provided in this embodiment includes a backlight module 104, a display panel 102, a liquid crystal polarization conversion device 107, a phase retardation film layer 108, and a time-division multiplexing control circuit 106.

[0054] The structure and working principle of the backlight module 104 and the display panel 102 are the same as in Embodiment 1. The backlight module 104 provides a non-polarized light source. The display panel 102 is a liquid crystal display panel. The liquid crystal display panel includes a first polarizer 1025, a thin film transistor array substrate 1026, a first liquid crystal layer 1027, an opposing substrate 1028, and a second polarizer 1029. The display panel 102 is connected to the timing controller 101 and the source driver chip 103. The thin film transistor array substrate 1026 includes multiple thin film transistors, multiple data lines 1023, multiple gate lines 1022, multiple pixels 1024, and at least one gate driving circuit 1021. The display panel 102 outputs linearly polarized light carrying image information.

[0055] The liquid crystal polarization conversion device 107 is disposed on the light-emitting side of the display panel 102. For example... Figure 7As shown, the liquid crystal polarization conversion device 107 includes a first substrate 1071, a first electrode layer 1072, a third liquid crystal layer 1073, a second electrode layer 1074, and a second substrate 1075. The first substrate 1071 is disposed on the side of the liquid crystal polarization conversion device 107 closest to the display panel 102. The first electrode layer 1072 is disposed on the light-emitting side surface of the first substrate 1071, and the first electrode layer 1072 is an indium tin oxide transparent conductive layer. The third liquid crystal layer 1073 is disposed between the first electrode layer 1072 and the second electrode layer 1074. The second electrode layer 1074 is disposed on the light-emitting side of the third liquid crystal layer 1073. The second electrode layer 1074 and the first electrode layer 1072 cooperate to apply a driving voltage to the third liquid crystal layer 1073. Under the action of the driving voltage, the liquid crystal molecules in the third liquid crystal layer 1073 deflect, changing the polarization direction of the linearly polarized light passing through the third liquid crystal layer 1073. The second substrate 1075 is disposed on the light-emitting side of the second electrode layer 1074.

[0056] like Figure 8 As shown, the liquid crystal polarization conversion device 107 switches between a first polarization conversion state and a second polarization conversion state under the control of the time-division multiplexing control circuit 106. The time-division multiplexing control circuit 106 is configured to control the deflection state of liquid crystal molecules in the third liquid crystal layer 1073 by changing the voltage applied between the first electrode layer 1072 and the second electrode layer 1074. In the first polarization conversion state, the time-division multiplexing control circuit 106 applies a first driving voltage to the third liquid crystal layer 1073 through the first electrode layer 1072 and the second electrode layer 1074. Under the action of the first driving voltage, the liquid crystal molecules in the third liquid crystal layer 1073 deflect to the first state, and the liquid crystal polarization conversion device 107 converts the linearly polarized light output from the display panel 102 into linearly polarized light with the first polarization direction and outputs it. In the second polarization conversion state, the time-division multiplexing control circuit 106 applies a second driving voltage to the third liquid crystal layer 1073 through the first electrode layer 1072 and the second electrode layer 1074. Under the action of the second driving voltage, the liquid crystal molecules in the third liquid crystal layer 1073 deflect to the second state. The liquid crystal polarization conversion device 107 converts the linearly polarized light output from the display panel 102 into linearly polarized light with the second polarization direction and outputs it. The first polarization direction and the second polarization direction are orthogonal to each other. The first polarization direction is horizontal and the second polarization direction is vertical, or the first polarization direction is vertical and the second polarization direction is horizontal.

[0057] A phase retardation layer 108 is disposed on the light-emitting side of the liquid crystal polarization conversion device 107. The phase retardation layer 108 is a fixed phase retardation layer 108, specifically a fixed quarter-wavelength phase retardation layer 108. The angle between the optical axis of the phase retardation layer 108 and the polarization direction of the linearly polarized light output from the liquid crystal polarization conversion device 107 is 45 degrees, and the phase retardation layer 108 has a quarter-wavelength phase retardation. The phase retardation layer 108 is configured to convert linearly polarized light in a first polarization direction into circularly polarized light in a first rotation direction, and to convert linearly polarized light in a second polarization direction into circularly polarized light in a second rotation direction, wherein the first rotation direction and the second rotation direction are opposite. The first rotation direction is right-handed circularly polarized light, and the second rotation direction is left-handed circularly polarized light.

[0058] The phase retardation film 108 includes a substrate and a phase retardation layer. The substrate of the phase retardation film 108 is a glass substrate, and the phase retardation layer is disposed on the substrate. The phase retardation layer is a polymer thin film or a liquid crystal polymer thin film, and the phase retardation layer has a phase retardation of one-quarter wavelength. The phase retardation film 108 uses a glass substrate, which, compared with conventional thin-film polarizer phase retarders, has higher flatness and dimensional stability, and higher alignment accuracy when bonded to the liquid crystal polarization conversion device 107.

[0059] The time-division multiplexing control circuit 106 is electrically connected to the backlight module 104, the display panel 102, and the liquid crystal polarization conversion device 107. The time-division multiplexing control circuit 106 is configured to control the display panel 102 to alternately display the left-eye parallax image and the right-eye parallax image at a preset frequency of 120 Hz or higher. The time-division multiplexing control circuit 106 is also configured to control the liquid crystal polarization conversion device 107 to switch between a first polarization conversion state and a second polarization conversion state, such that the liquid crystal polarization conversion device 107 outputs linearly polarized light in a first polarization direction in the first polarization conversion state and outputs linearly polarized light in a second polarization direction in the second polarization conversion state, wherein the first polarization direction and the second polarization direction are orthogonal to each other.

[0060] The operation of the display device in this embodiment is as follows. Figure 8As shown, during the first time period, the time-division multiplexing control circuit 106 controls the display panel 102 to output a left-eye parallax image, and the display panel 102 outputs linearly polarized light carrying information from the left-eye parallax image. The time-division multiplexing control circuit 106 synchronously controls the liquid crystal polarization conversion device 107 to switch to a first polarization conversion state. The liquid crystal polarization conversion device 107 converts the linearly polarized light output from the display panel 102 into linearly polarized light with a first polarization direction and outputs it. After passing through the phase retardation film layer 108, the linearly polarized light with the first polarization direction is converted into circularly polarized light with a first rotation direction and output. The circularly polarized light with the first rotation direction is received by the viewer's left eye through the left-eye channel of the circularly polarized 3D glasses worn by the viewer. During the second time period, the time-division multiplexing control circuit 106 controls the display panel 102 to output a right-eye parallax image, and the display panel 102 outputs linearly polarized light carrying information from the right-eye parallax image. The time-division multiplexing control circuit 106 synchronously controls the liquid crystal polarization conversion device 107 to switch to the second polarization conversion state. The liquid crystal polarization conversion device 107 converts the linearly polarized light output from the display panel 102 into linearly polarized light with a second polarization direction and outputs it. After passing through the phase retardation film layer 108, the linearly polarized light with the second polarization direction is converted into circularly polarized light with a second rotation direction and output. The circularly polarized light with the second rotation direction is received by the viewer's right eye through the right eye channel of the circularly polarized 3D glasses.

[0061] In this embodiment, the time-division multiplexing control circuit 106 is configured to control the backlight module 104 to turn off during the data writing process of a frame of image on the display panel 102, and to control the backlight module 104 to turn on and synchronously control the liquid crystal polarization conversion device 107 to switch to the first polarization conversion state or the second polarization conversion state after the display panel 102 has completed the data writing of a frame of image (at which time it is in the blanking period). Alternatively, the time-division multiplexing control circuit 106 is configured to control the liquid crystal polarization conversion device 107 to be in the extinction state during the data writing process of a frame of image on the display panel 102, and to control the liquid crystal polarization conversion device 107 to switch to the first polarization conversion state or the second polarization conversion state after the display panel 102 has completed the data writing of a frame of image (at which time it is in the blanking period). During the process of writing one frame of image data line by line on the display panel 102, the time-division multiplexing control circuit 106 controls the backlight module 104 to turn off, or controls the liquid crystal polarization conversion device 107 to be in an extinction state. After the display panel 102 completes the writing of one frame of image data and the liquid crystal molecules in the first liquid crystal layer 1027 are deflected into place, the time-division multiplexing control circuit 106 controls the backlight module 104 to turn on, and simultaneously controls the liquid crystal polarization conversion device 107 to switch to the first polarization conversion state or the second polarization conversion state. By controlling the turn-on time of the backlight module 104 and the state switching time of the liquid crystal polarization conversion device 107, the aliasing of the left and right eye images during the screen refresh of the display panel 102 is avoided, and the crosstalk between the left and right eye images is reduced.

[0062] Example 3 This embodiment provides a three-dimensional image display method based on the display device of Embodiment 1. For example... Figure 5 As shown, the three-dimensional image display method includes the following steps.

[0063] The first step involves providing a light source through the backlight module 104. This light source is converted into linearly polarized light after passing through the display panel 102. The backlight module 104 outputs unpolarized light, which is converted into first linearly polarized light by the first polarizer 1025 of the display panel 102. The first linearly polarized light then passes through the thin-film transistor array substrate 1026, the first liquid crystal layer 1027, the opposing substrate 1028, and the second polarizer 1029, before being converted into second linearly polarized light carrying image information and output.

[0064] The second step involves controlling the display panel 102 to alternately display the left-eye and right-eye parallax images at a preset frequency via the time-division multiplexing control circuit 106. The preset frequency is 120 Hz or higher. The time-division multiplexing control circuit 106 sends the left-eye and right-eye parallax image data to the source driver chip 103 of the display panel 102 via the timing controller 101. The source driver chip 103 writes the image data to the pixel 1024 via the data line 1023. The gate driver circuit 1021 scans line by line via the gate line 1022, and the display panel 102 alternately displays the left-eye and right-eye parallax images at the preset frequency.

[0065] The third step involves synchronously controlling the electronically controlled phase delay device 105 to switch between a first phase delay state and a second phase delay state via the time-division multiplexing control circuit 106. The time-division multiplexing control circuit 106 applies a driving voltage to the first transparent electrode 1052 and the second transparent electrode 1054 of the electronically controlled phase delay device 105. In the first phase delay state, the electronically controlled phase delay device 105 generates a positive phase delay of one-quarter wavelength, and in the second phase delay state, it generates a negative phase delay of one-quarter wavelength. In the first phase delay state, the electronically controlled phase delay device 105 converts linearly polarized light into circularly polarized light with a first rotation direction, and in the second phase delay state, it converts linearly polarized light into circularly polarized light with a second rotation direction.

[0066] Fourthly, when the display panel 102 outputs the left-eye parallax image, the electrically controlled phase delay device 105 outputs circularly polarized light with the first rotation direction. The time-division multiplexing control circuit 106 controls the display panel 102 to output the left-eye parallax image, and synchronously controls the electrically controlled phase delay device 105 to switch to the first phase delay state. The electrically controlled phase delay device 105 converts the linearly polarized light output by the display panel 102 into circularly polarized light with the first rotation direction and outputs it.

[0067] Fifth, when the display panel 102 outputs the right-eye parallax image, the electrically controlled phase delay device 105 outputs circularly polarized light with a second rotation direction. The time-division multiplexing control circuit 106 controls the display panel 102 to output the right-eye parallax image, and synchronously controls the electrically controlled phase delay device 105 to switch to the second phase delay state. The electrically controlled phase delay device 105 converts the linearly polarized light output from the display panel 102 into circularly polarized light with a second rotation direction and outputs it. The first rotation direction is opposite to the second rotation direction.

[0068] The three-dimensional image display method of this embodiment further includes: during the data writing process of a frame of image on the display panel 102, the time-division multiplexing control circuit 106 controls the backlight module 104 to turn off; after the display panel 102 completes the data writing of a frame of image (at this time, it is in the blanking period), the time-division multiplexing control circuit 106 controls the backlight module 104 to turn on and synchronously controls the electronically controlled phase delay device 105 to switch to the first phase delay state or the second phase delay state. Alternatively, during the data writing process of a frame of image on the display panel 102, the time-division multiplexing control circuit 106 controls the electronically controlled phase delay device 105 to be in the extinction state; after the display panel 102 completes the data writing of a frame of image (at this time, it is in the blanking period), the time-division multiplexing control circuit 106 controls the electronically controlled phase delay device 105 to switch to the first phase delay state or the second phase delay state. Through the above technical solution, the aliasing of the left and right eye images caused by the coexistence of the previous frame and the next frame during the line-by-line scanning and writing of image data by the display panel 102 is avoided, and the crosstalk between the left and right eye images is reduced.

[0069] Example 4 This embodiment provides a three-dimensional image display method based on the display device of Embodiment 2. For example... Figure 8 As shown, the three-dimensional image display method includes the following steps.

[0070] The first step is to provide a light source through the backlight module 104, which is then converted into linearly polarized light after passing through the display panel 102.

[0071] The second step involves using a time-division multiplexing control circuit 106 to control the display panel 102 to alternately display the left-eye parallax image and the right-eye parallax image at a preset frequency. The preset frequency is 120 Hz or higher.

[0072] Thirdly, the time-division multiplexing control circuit 106 synchronously controls the liquid crystal polarization conversion device 107 to switch between the first polarization conversion state and the second polarization conversion state. The time-division multiplexing control circuit 106 applies a driving voltage to the first electrode layer 1072 and the second electrode layer 1074 of the liquid crystal polarization conversion device 107. In the first polarization conversion state, the liquid crystal polarization conversion device 107 outputs linearly polarized light in the first polarization direction, and in the second polarization conversion state, it outputs linearly polarized light in the second polarization direction. The first polarization direction and the second polarization direction are orthogonal to each other.

[0073] The fourth step involves converting the linearly polarized light output from the liquid crystal polarization conversion device 107 into circularly polarized light through a phase retardation film 108. The phase retardation film 108 is a fixed phase retardation film 108, possessing a quarter-wavelength phase retardation. The phase retardation film 108 converts the linearly polarized light output from the liquid crystal polarization conversion device 107 in the first polarization direction into circularly polarized light in the first rotation direction, and converts the linearly polarized light output from the liquid crystal polarization conversion device 107 in the second polarization direction into circularly polarized light in the second rotation direction.

[0074] Fifth, when the display panel 102 outputs the left-eye parallax image, the phase retardation film 108 outputs circularly polarized light with the first rotation direction. The time-division multiplexing control circuit 106 controls the display panel 102 to output the left-eye parallax image, and synchronously controls the liquid crystal polarization conversion device 107 to switch to the first polarization conversion state. The liquid crystal polarization conversion device 107 outputs linearly polarized light with the first polarization direction, and the phase retardation film 108 converts the linearly polarized light with the first polarization direction into circularly polarized light with the first rotation direction and outputs it.

[0075] In the sixth step, when the display panel 102 outputs the right-eye parallax image, the phase retardation film 108 outputs circularly polarized light with a second rotation direction. The time-division multiplexing control circuit 106 controls the display panel 102 to output the right-eye parallax image, and synchronously controls the liquid crystal polarization conversion device 107 to switch to the second polarization conversion state. The liquid crystal polarization conversion device 107 outputs linearly polarized light with a second polarization direction, and the phase retardation film 108 converts the linearly polarized light with a second polarization direction into circularly polarized light with a second rotation direction and outputs it. The first rotation direction is opposite to the second rotation direction.

[0076] The three-dimensional image display method in this embodiment also includes: during the data writing process of a frame of image on the display panel 102, the time-division multiplexing control circuit 106 controls the backlight module 104 to turn off; after the display panel 102 completes the data writing of a frame of image (at this time, it is in the blanking period), the time-division multiplexing control circuit 106 controls the backlight module 104 to turn on and synchronously controls the liquid crystal polarization conversion device 107 to switch to the first polarization conversion state or the second polarization conversion state. Alternatively, during the data writing process of a frame of image on the display panel 102, the time-division multiplexing control circuit 106 controls the liquid crystal polarization conversion device 107 to be in the extinction state; after the display panel 102 completes the data writing of a frame of image (at this time, it is in the blanking period), the time-division multiplexing control circuit 106 controls the liquid crystal polarization conversion device 107 to switch to the first polarization conversion state or the second polarization conversion state.

[0077] The display device and three-dimensional image display method provided in this application, by employing time-division multiplexing technology, avoid the resolution reduction problem caused by the traditional polarized three-dimensional display technology's spatial pixel division for left and right eye image splitting, thus ensuring that the resolution of the three-dimensional display remains consistent with that of the two-dimensional display. The electrically controlled phase delay device 105 or the liquid crystal polarization converter 107, under the control of the time-division multiplexing control circuit 106, rapidly switches, converting the linearly polarized light output from the display panel 102 into circularly polarized light with opposite rotation, achieving precise separation of the left and right eye images. The electrically controlled phase delay device 105 or the liquid crystal polarization converter 107 uses a glass substrate, resulting in high alignment accuracy when bonded to the display panel 102, reducing crosstalk between the left and right eye images. During the process of writing image data line by line on the display panel 102, the time-division multiplexing control circuit 106 controls the backlight module 104 to turn off or controls the electrically controlled phase delay device 105 or the liquid crystal polarization converter 107 to be in an extinction state, preventing aliasing of the left and right eye images during the refresh of the display panel 102, further reducing crosstalk between the left and right eye images.

[0078] The embodiments of this application have been described in detail above. The content of this specification should not be construed as limiting the scope of protection of this application.

Claims

1. A display device, characterized in that, The display device includes: Backlight module; A display panel is disposed on the light-emitting side of the backlight module. The display panel includes a first polarizer, a thin-film transistor array substrate, a first liquid crystal layer, an opposing substrate, and a second polarizer. An electrically controlled phase delay device is disposed on the light-emitting side of the display panel. The electrically controlled phase delay device includes a first glass substrate, a first transparent electrode, a second liquid crystal layer, a second transparent electrode, and a second glass substrate, wherein the second liquid crystal layer is disposed between the first transparent electrode and the second transparent electrode. A time-division multiplexing control circuit is electrically connected to the display panel and the electronically controlled phase delay device. The time-division multiplexing control circuit is configured to control the display panel to alternately display the left-eye parallax image and the right-eye parallax image at a preset frequency, and is configured to synchronously control the electronically controlled phase delay device to switch between a first phase delay state and a second phase delay state, such that the electronically controlled phase delay device generates a quarter-wavelength positive phase delay in the first phase delay state and a quarter-wavelength negative phase delay in the second phase delay state.

2. The display device according to claim 1, characterized in that, The polarization direction of the linearly polarized light output by the display panel is 45 degrees from the optical axis of the electrically controlled phase delay device. The electrically controlled phase delay device is configured to convert the linearly polarized light into circularly polarized light with a first rotation direction in the first phase delay state, and to convert the linearly polarized light into circularly polarized light with a second rotation direction in the second phase delay state, wherein the first rotation direction is opposite to the second rotation direction.

3. The display device according to claim 1, characterized in that, The electrically controlled phase delay device further includes a liquid crystal alignment layer, the liquid crystal alignment layer and the second liquid crystal layer are disposed between the first transparent electrode and the second transparent electrode, the second liquid crystal layer is a nematic liquid crystal layer, and the time-division multiplexing control circuit is configured to control the deflection angle of liquid crystal molecules in the second liquid crystal layer by changing the driving voltage applied between the first transparent electrode and the second transparent electrode.

4. The display device according to claim 1, characterized in that, The time-division multiplexing control circuit is configured to control the backlight module to turn off during the data writing process of a frame of image on the display panel, and to control the backlight module to turn on after the data writing of a frame of image on the display panel is completed, and to synchronously control the electronically controlled phase delay device to switch to the first phase delay state or the second phase delay state.

5. The display device according to claim 1, characterized in that, The time-division multiplexing control circuit is configured to control the electrically controlled phase delay device to be in an extinction state during the data writing process of a frame of image on the display panel, and to control the electrically controlled phase delay device to switch to the first phase delay state or the second phase delay state after the data writing of a frame of image on the display panel is completed.

6. A display device, characterized in that, The display device includes: Backlight module; A display panel is disposed on the light-emitting side of the backlight module. The display panel includes a first polarizer, a thin-film transistor array substrate, a first liquid crystal layer, an opposing substrate, and a second polarizer. A liquid crystal polarization conversion device is disposed on the light-emitting side of the display panel. The liquid crystal polarization conversion device includes a first substrate, a first electrode layer, a third liquid crystal layer, a second electrode layer, and a second substrate. The third liquid crystal layer is disposed between the first electrode layer and the second electrode layer. A phase retardation film is disposed on the light-emitting side of the liquid crystal polarization conversion device, the phase retardation film having a quarter-wavelength phase retardation; and A time-division multiplexing control circuit is electrically connected to the display panel and the liquid crystal polarization conversion device. The time-division multiplexing control circuit is configured to control the display panel to alternately display the left-eye parallax image and the right-eye parallax image at a preset frequency, and is configured to control the liquid crystal polarization conversion device to switch between a first polarization conversion state and a second polarization conversion state, such that the liquid crystal polarization conversion device outputs linearly polarized light in a first polarization direction in the first polarization conversion state and outputs linearly polarized light in a second polarization direction in the second polarization conversion state, wherein the first polarization direction and the second polarization direction are orthogonal to each other.

7. The display device according to claim 6, characterized in that, The phase retardation film is configured to convert linearly polarized light in the first polarization direction into circularly polarized light in the first rotation direction, and to convert linearly polarized light in the second polarization direction into circularly polarized light in the second rotation direction, wherein the first rotation direction is opposite to the second rotation direction.

8. The display device according to claim 6, characterized in that, The first electrode layer is disposed on the first substrate, the second electrode layer is disposed on the second substrate, and the time-division multiplexing control circuit is configured to control the deflection state of liquid crystal molecules in the third liquid crystal layer by changing the voltage applied between the first electrode layer and the second electrode layer.

9. The display device according to claim 6, characterized in that, The time-division multiplexing control circuit is configured to control the backlight module to turn off during the data writing process of a frame of image on the display panel, and to control the backlight module to turn on and synchronously control the liquid crystal polarization conversion device to switch to the first polarization conversion state or the second polarization conversion state after the data writing of a frame of image on the display panel is completed.

10. The display device according to claim 6, characterized in that, The time-division multiplexing control circuit is configured to control the liquid crystal polarization converter to be in an extinction state during the data writing process of a frame of image on the display panel, and to control the liquid crystal polarization converter to switch to the first polarization conversion state or the second polarization conversion state after the data writing of a frame of image on the display panel is completed.

11. A method for displaying a three-dimensional image, characterized in that, The three-dimensional image display method includes: A light source is provided by a backlight module, and the light source is converted into linearly polarized light after passing through the display panel; The display panel is controlled by a time-division multiplexing control circuit to alternately display the left-eye parallax image and the right-eye parallax image at a preset frequency; and The time-division multiplexing control circuit synchronously controls the electronically controlled phase delay device to switch between a first phase delay state and a second phase delay state. The electronically controlled phase delay device generates a positive phase delay of one-quarter wavelength in the first phase delay state and generates a negative phase delay of one-quarter wavelength in the second phase delay state. Specifically, when the display panel outputs the left-eye parallax image, the electronically controlled phase delay device outputs circularly polarized light with a first rotation direction; when the display panel outputs the right-eye parallax image, the electronically controlled phase delay device outputs circularly polarized light with a second rotation direction, wherein the first rotation direction is opposite to the second rotation direction.

12. The three-dimensional image display method according to claim 11, characterized in that, The three-dimensional image display method further includes: During the data writing process of a frame of image on the display panel, the backlight module is controlled to turn off; After the display panel completes the data writing of a frame of image, the backlight module is controlled to turn on and the electronically controlled phase delay device is simultaneously controlled to switch to the first phase delay state or the second phase delay state.

13. The three-dimensional image display method according to claim 11, characterized in that, The three-dimensional image display method further includes: During the data writing process of a frame of image on the display panel, the electronically controlled phase delay device is controlled to be in an extinction state; After the display panel completes the data writing of a frame of image, the electronically controlled phase delay device is controlled to switch to the first phase delay state or the second phase delay state.

14. A method for displaying a three-dimensional image, characterized in that, The three-dimensional image display method includes: A light source is provided by a backlight module, and the light source is converted into linearly polarized light after passing through the display panel; The display panel is controlled by a time-division multiplexing control circuit to alternately display the left-eye parallax image and the right-eye parallax image at a preset frequency. The time-division multiplexing control circuit synchronously controls the liquid crystal polarization conversion device to switch between a first polarization conversion state and a second polarization conversion state. In the first polarization conversion state, the liquid crystal polarization conversion device outputs linearly polarized light in a first polarization direction; in the second polarization conversion state, it outputs linearly polarized light in a second polarization direction. The first polarization direction and the second polarization direction are orthogonal to each other. The linearly polarized light output from the liquid crystal polarization conversion device is converted into circularly polarized light through a phase retardation film layer, wherein the phase retardation film layer has a phase retardation of one-quarter wavelength. Specifically, when the display panel outputs the left-eye parallax image, the phase retardation film outputs circularly polarized light with a first rotation direction; when the display panel outputs the right-eye parallax image, the phase retardation film outputs circularly polarized light with a second rotation direction, wherein the first rotation direction is opposite to the second rotation direction.

15. The three-dimensional image display method according to claim 14, characterized in that, The three-dimensional image display method further includes: During the data writing process of a frame of image on the display panel, the backlight module is controlled to turn off; After the display panel completes the data writing of a frame of image, the backlight module is turned on and the liquid crystal polarization conversion device is switched to the first polarization conversion state or the second polarization conversion state simultaneously.

16. The three-dimensional image display method according to claim 14, characterized in that, The three-dimensional image display method further includes: During the data writing process of a frame of image on the display panel, the liquid crystal polarization conversion device is controlled to be in an extinction state; After the display panel completes the data writing of a frame of image, the liquid crystal polarization conversion device is controlled to switch to the first polarization conversion state or the second polarization conversion state.

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