Field sequential display

Abstract

The application relates to the field of 3D display technology and discloses a field sequential display, which comprises a multi-view naked-eye 3D display screen, a plurality of composite pixels, each of the plurality of composite pixels comprising a plurality of pixels corresponding to a plurality of viewpoints of the field sequential display; a light source device comprising a plurality of monochromatic light sources; a light source time sequence controller configured to control the on and off time of the plurality of monochromatic light sources; and a 3D processing device in communication connection with the light source time sequence controller and the multi-view naked-eye 3D display screen and configured to make the light source time sequence controller switch on at least part of the plurality of monochromatic light sources in a time sequence manner to render the corresponding pixels in each composite pixel in the multi-view naked-eye 3D display screen. The field sequential display can save color filters and improve the light utilization rate of the light source.

Description

Technical Field

[0001] This application relates to the field of 3D display technology, such as field sequence display. Background Technology

[0002] Currently, naked-eye 3D display devices are usually based on the principle of spatial color mixing. This mainly involves arranging sub-pixels of different colors (such as the three primary color sub-pixels of light: red (R), green (G), and blue (B)) in a high density in a plane. Since the spatial resolution of the human eye cannot distinguish between different colors of light, these colors of light are mixed to provide a color image.

[0003] Naked-eye 3D display devices based on the principle of spatial color mixing require expensive color filters, and the absorption of light from the light source by the color filters leads to a reduction in light utilization efficiency. Therefore, researchers have attempted to replace current displays with field sequence displays for naked-eye 3D, but this presents challenges to the circuitry because its light source device needs to include multiple high-frequency flickering monochromatic light sources. Summary of the Invention

[0004] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0005] This disclosure provides a field sequence display to solve at least some of the aforementioned technical problems.

[0006] In some embodiments, a field sequence display is disclosed, comprising: a multi-viewpoint glasses-free 3D display screen including a plurality of composite pixels, each of the plurality of composite pixels including a plurality of pixels corresponding to a plurality of viewpoints of the field sequence display; a light source device including a plurality of monochromatic light sources; a light source timing controller configured to control the on and off times of the plurality of monochromatic light sources; and a 3D processing device communicatively connected to the light source timing controller and the multi-viewpoint glasses-free 3D display screen, and configured to cause the light source timing controller to sequentially switch on at least a portion of the monochromatic light sources to render corresponding pixels in each composite pixel of the multi-viewpoint glasses-free 3D display screen.

[0007] In some embodiments, the light source timing controller is configured to turn on the light source driving circuit in a timing manner based on signals from the 3D processing device, so as to turn on at least a portion of the monochromatic light sources among a plurality of monochromatic light sources.

[0008] In some embodiments, the light source timing controller is configured to pre-activate at least one monochromatic light source that is temporally adjacent to the monochromatic light source required in the next time period within a specific time period after keeping the monochromatic light source required in the current time period on.

[0009] In some embodiments, the light source timing controller is configured to pre-activate at least the monochromatic light source required for the next time period within a specific time period after keeping the monochromatic light source activated for the current time period activated, based on the circuit response time; wherein the circuit response time is the time required from the monochromatic light source being activated to its illumination.

[0010] In some embodiments, the light source timing controller is configured to time-stagger the illumination time of the monochromatic light source required in the current time period with the illumination time of the monochromatic light source required in at least the next time period.

[0011] In some embodiments, the plurality of monochromatic light sources include at least one of a red light source, a green light source, and a blue light source.

[0012] In some embodiments, a multi-view naked-eye 3D display screen includes: a display panel including a plurality of composite pixels; and a grating covering the plurality of composite pixels of the display panel; wherein the grating includes a first lens array and a second lens array, the surfaces of the first lens array and the second lens array that are opposite to each other are planar, and the surfaces of the first lens array and the second lens array that are opposite to each other are complementary in terms of concavity and convexity.

[0013] In some embodiments, one of the first lens array and the second lens array is a plano-convex lens array, and the other lens array is a plano-concave lens array, wherein the refractive index of the plano-convex lens array is higher than that of the plano-concave lens array.

[0014] In some embodiments, a field sequence display is disclosed, comprising: a multi-viewpoint naked-eye 3D display screen including a plurality of composite pixels, each of the plurality of composite pixels including a plurality of pixels corresponding to a plurality of viewpoints of the field sequence display; a light source device including a plurality of monochromatic light sources, the plurality of monochromatic light sources including a blue light source; and a blue light selective filtering device disposed on the light-emitting side of the blue light source and configured to selectively filter blue light.

[0015] In some embodiments, the blue light selective filter is configured to filter blue light close to ultraviolet wavelengths.

[0016] In some embodiments, the blue light selective filter is configured as a narrow-band filter that allows blue light with a wavelength greater than or equal to 440 nm to pass through.

[0017] Blue light is harmful to the human eye, but it is also a primary color of light and is indispensable for color displays. The most harmful part of blue light to the human eye is the wavelength range close to the ultraviolet, such as wavelengths shorter than 440nm.

[0018] The field sequence display provided in this disclosure can achieve the following technical effects:

[0019] The elimination of color filters improves the light utilization rate of the light source. Furthermore, the display resolution of the multi-view naked-eye 3D display is defined using composite pixels. Both transmission and display are based on this composite pixel-defined resolution, reducing the computational load of transmission and rendering while ensuring high-definition display effects, thus achieving high-quality naked-eye 3D display.

[0020] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0022] Figure 1 This is a schematic diagram of the internal architecture of a field sequence display according to an embodiment of the present disclosure;

[0023] Figure 2 This is a schematic diagram showing the positional relationship between the light source device and the multi-view naked-eye 3D display screen according to an embodiment of the present disclosure;

[0024] Figure 3 This is a schematic diagram of a light source device according to an embodiment of the present disclosure;

[0025] Figure 4 This is a comparative schematic diagram showing the effect of circuit response time according to embodiments of the present disclosure on display control in different ways;

[0026] Figure 5 This is a schematic diagram illustrating the principle of driving corresponding pixels in a composite pixel according to an embodiment of the present disclosure;

[0027] Figure 6 This is a schematic diagram of the structure of a multi-view naked-eye 3D display screen according to an embodiment of the present disclosure;

[0028] Figure 7 This is a schematic diagram of the structure of the cylindrical lens optical composite film according to an embodiment of the present disclosure;

[0029] Figure 8 A schematic diagram of the structure of a cylindrical lens grating according to an embodiment of the present disclosure is shown in cross-sectional view.

[0030] Figure 9 A schematic diagram of another cylindrical lens grating according to an embodiment of the present disclosure is shown in cross-sectional view.

[0031] Figure 10 This is a schematic diagram of a blue light selection and filtering device installed in an on-site sequence display according to an embodiment of the present disclosure;

[0032] Figure 11 This is a flowchart of a display control method for a field sequence display according to an embodiment of the present disclosure.

[0033] Figure label:

[0034] 1: Lenticular lens optical composite film; 11: Lenticular lens grating; 111: Substrate; 112: Plano-convex lenticular lens array; 1121: Plano-convex lenticular lens; 113: Plano-concave lenticular lens array; 1131: Plano-concave lenticular lens; 114: Substrate; 115: Adhesive layer; 12: Polarizer; 13: Release film; 2: Display panel layer; 21: Substrate; 22: Substrate; 23: Display driving circuit; 25: Liquid crystal layer; 26: Polarizer; 110: Multi-viewpoint naked-eye 3D display screen; 130: 3D processing device ; 140: Light source driver; 141: Light source timing controller; 142: Light source driver circuit; 150: Display screen driver; 151: Display screen timing controller; 1511: Row driver; 1512: Column driver; 200: Composite pixel; 210: Sub-pixel; 300: Light source device; 310: Light source group; 320: Local light emission area; 310R: Red light source; 310G: Green light source; 310B: Blue light source; 400: Blue light selective filter. Detailed Implementation

[0035] In order to gain a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of this disclosure.

[0036] In this article, "glasses-free 3D display" refers to a technology that allows users to observe 3D display images on a flat panel display without wearing 3D display glasses.

[0037] In this article, "multi-viewpoint" has its conventional meaning in the art, referring to the different images displayed by different pixels or subpixels of a display screen that can be viewed from different locations (viewpoints) in space. In this article, multi-viewpoint will mean at least 3 viewpoints.

[0038] In this article, the term "pixel" generally refers to the smallest display unit in terms of resolution when a 2D display is used or when it is displayed as a 2D display.

[0039] However, in some embodiments herein, the term "composite pixel" used when applied to multi-view technology in the field of glasses-free 3D displays refers to the smallest display unit when a glasses-free 3D display provides multi-view display, but this does not preclude a single composite pixel used for multi-view technology from including or representing multiple pixels for 2D display. In this document, unless specifically stated as a composite pixel or 3D pixel for "3D display" or "multi-view" applications, a pixel will refer to the smallest display unit for 2D display.

[0040] According to embodiments of this disclosure, a field sequence display is provided for displaying multi-viewpoint glasses-free 3D images. The field sequence display includes a multi-viewpoint glasses-free 3D display screen, a light source device, a light source timing controller, and a 3D processing device. The multi-viewpoint glasses-free 3D display screen may include a plurality of composite pixels, wherein each composite pixel includes a plurality of pixels. The number of pixels contained in each composite pixel corresponds to the number of viewpoints of the field sequence display. In some embodiments, there is a one-to-one correspondence between the pixels contained in each composite pixel and the viewpoints of the field sequence display.

[0041] The light source device can be located on the back side of the multi-view naked-eye 3D display screen to provide colored light to the multi-view naked-eye 3D display screen to render the corresponding pixel of each composite pixel in the multi-view naked-eye 3D display screen. The light source device can include multiple monochromatic light sources, which can include monochromatic light sources of different colors, such as red light source (R light source), green light source (G light source), and blue light source (B light source), and can form an RGB emission sequence or an RGBBGR emission sequence. Or, for example, it can include red light source (R light source), blue light source (B light source), and yellow light source (Y light source), and can form an RYYB emission sequence. Or, for example, it can include red light source (R light source), green light source (G light source), blue light source (B light source), yellow light source (Y), and cyan light source (C), and can form an RGBYC emission sequence. In addition, those skilled in the art can also list other monochromatic light sources of different colors and emission sequences, which will not be elaborated here. In some embodiments, the light source device includes a compensation light source, such as an orange light source or a white light source.

[0042] A light source timing controller is configured to control the on / off times of at least some monochromatic light sources in a light source device. For example, in an RGB emission sequence, the light source timing controller sequentially turns on the R, G, and B light sources in chronological order (timing). Utilizing the human eye's inability to distinguish rapidly switching monochromatic light, a color mixing effect in the time direction (i.e., time-based additive color mixing) is used to mix the monochromatic light emitted by different colored monochromatic light sources in the human eye to display a color 3D image. In the presence of a compensation light source, the light source timing controller is also configured to control the on / off times of the compensation light source.

[0043] The 3D processing device is communicatively connected to the light source timing controller and the multi-view naked-eye 3D display screen, and sends light source driving signals and display screen driving signals respectively, so that the light source timing controller can switch on the monochromatic light source required for each time period in a timing manner, thereby rendering the corresponding pixel in each composite pixel in the multi-view naked-eye 3D display screen.

[0044] Figure 1 An exemplary schematic diagram of the internal architecture of a field sequence display is shown. Figure 1 As shown, the 3D processing device 130 is communicatively connected to the light source driving device 140 and the display screen driving device 150. The light source driving device 140 includes a light source timing controller 141 and a light source driving circuit 142 controlled by the light source timing controller 141. The light source timing controller 141 activates the light source driving circuit 142 according to the light source driving signal issued by the 3D processing device, sequentially activating and illuminating different monochromatic light sources of different colors in the light source device. In the illustrated embodiment, the monochromatic light sources include an R light source 310R, a G light source 310G, and a B light source 310B. The display screen driving device 150 includes a display screen timing controller 151, which controls the corresponding pixels 210 in the composite pixels 200 of the multi-view naked-eye 3D display screen 110 to display images according to the display screen driving signal issued by the 3D processing device 130.

[0045] like Figure 2 As shown, the light source device can be arranged on the back side of the multi-view naked-eye 3D display screen 110 to serve as a backlight for illuminating the multi-view naked-eye 3D display screen 110. The light source device can have multiple light sources composed of light-emitting elements, such as a red light source 310R, a green light source 310G, and a blue light source 310B. The light-emitting elements can be, for example, light-emitting diodes (LEDs).

[0046] Figure 3 An exemplary light source device 300 is shown. Figure 3As shown, the light source device 300 has multiple light source groups 310 arranged in an array, each light source group 310 including an R light source 310R, a G light source 310G, and a B light source 310B. The multiple light source groups 310 can be arranged in the light source device 300 in an m-column n-row (m×n array) configuration, thus forming a local light-emitting region 320 of the m×n array of the light source device 300, where each light source group 310 corresponds to a local light-emitting region 320. Under the control of the 3D processing device 130 and the light source driving device 140, each light source group 310 of the light source device 300 is independently switched on and off according to the input 3D signal (3D video signal), thereby allowing for local adjustment of the backlight brightness and chromaticity based on the 3D video to be displayed. The figure only shows an example of an R light source 310R, a G light source 310G, and a B light source 310B, each light source group 310 consisting of a single light-emitting element. However, those skilled in the art will understand that the color type of the monochromatic light source in each light source group 310 and the number of light-emitting devices constituting the monochromatic light source can be adjusted according to actual needs. For example, the monochromatic light source in each light source group 310 can be composed of two or more light-emitting elements.

[0047] Under the control of the light source driving circuit 142, each light source group 310 emits primary color light by independently switching on and emitting light (lighting up) the R light source 310R, G light source 310G, and B light source 310B. Since the light emission of each light source group 310 constitutes a local light emission area 320, the light source device 300 can perform color display at a resolution lower than the composite pixel resolution of the multi-view naked-eye 3D display screen 110. In some embodiments, the m×n array of light source groups 310 of the light source device 300 is compared with the x×y array (x columns and y rows) composite pixels of the multi-view naked-eye 3D display screen 110, where m≤x and n≤y.

[0048] Continue to refer to Figure 1 A 3D video signal (3D signal) containing R, G, and B image signals is input into the 3D processing device 130. The 3D processing device performs various signal processing on the 3D signal, controls the activation of the monochromatic light source of the light source device 300, and controls the display of the multi-view naked-eye 3D display screen 110. According to the field sequence display mode, different monochromatic light sources are sequentially activated in a time-division manner within a frame of an image, synchronously with the display drive of the multi-view naked-eye 3D display screen, to render the corresponding pixels in the composite pixels and perform color display. By adopting the field sequence display mode, the high-cost and light-utilizing color filter can be eliminated.

[0049] Here, a "frame" refers to an image unit in 3D video. One image corresponds to one frame, and 3D video is composed of multiple frames. Within a single frame, the color image formed by composite pixels rendered based on a monochromatic light source is called a "subframe," and each frame is composed of multiple subframes. These subframes are superimposed and combined on the retina of the human eye in time, thereby reconstructing (reproducing) a single frame.

[0050] The 3D processing device 130 may include computational circuitry and a memory to process 3D signals and store the processing results. The computational circuitry may perform processes such as optical linearization, separation of color components, compensation components, and primary color components, comparison of brightness or chromaticity between different light-emitting areas of the light source device 300, and subframe switching control. The 3D processing device 130 provides the processing results as drive signals to the light source drive device 140 and the display drive device 150, respectively. In some embodiments, the 3D processing device 130 may have a resolution conversion calculation function or module to accommodate 3D signals, light source devices, and multi-viewpoint glasses-free 3D displays with different resolutions.

[0051] The light source driving device 140 can drive the LED light source using pulse signals based on the light source driving signal of the 3D processing device 130. As described above, each frame of image is divided into multiple subframes that are sequentially arranged on the time axis and switch rapidly. The light source timing control device 141 needs to control the light source device 300 to synchronously switch and illuminate the monochromatic light source required for each time period. For field sequence displays, rapid switching and illumination of monochromatic light sources is beneficial to the display effect. However, due to the existence of circuit response time, it takes a certain amount of time (a specific time) for a monochromatic light source to go from being turned on to being illuminated, usually measured in milliseconds. The accumulation of circuit response time for illuminating each monochromatic light source will affect the switching speed of the subframes, easily causing color breaks and damaging the display effect of the field sequence display.

[0052] Figure 4 The upper part of the figure illustrates the impact of circuit response time on the switching and lighting speed of monochromatic light sources, while the high-level part represents the lighting time of the monochromatic light sources. As shown in the figure, monochromatic light sources R', G', and B' are sequentially turned on along the time axis T. When the red light source R' is turned off at time point T1', the green light source G' is turned on. Due to the circuit response time t, the green light source G' actually lights up at time point T1'+t. Similarly, when the green light source G' is turned off and the blue light source B' is turned on at time point T2', the blue light source B' actually lights up at time point T2'+t due to the circuit response time t. Figure 4 It is clear that the circuit response time affects the rapid timing switching of the monochromatic light source, and eliminating this effect is beneficial to improving the display effect of the field sequence display.

[0053] Continue to refer to Figure 4 The lower half illustrates an example of eliminating the effects of circuit response time. Based on the circuit response time, the light source timing controller pre-activates the monochromatic light source required for at least the next time period, which is temporally adjacent to the current time period, within a specific time interval after keeping the monochromatic light source required for the current time period on. As shown, the red light source R is extinguished at time point T1', while at time point T, which is calculated by reversing the circuit response time t from T1' along the time axis T, the green light source G required for the next time period is activated. In other words, at time point T1 = T1' - t, the green light source G required for the next time period is activated. Similarly, the activation time T2 of the blue light source B, which is temporally adjacent to the green light source G, is also derived by reversing the circuit response time t from the time point when the green light source G is extinguished along the time axis T. Figure 4 It also clearly demonstrates the beneficial consequences of using this method to eliminate the influence of circuit response time, namely, the switching and lighting speed of the monochromatic light source is greatly increased, and correspondingly, the switching speed of each subframe in a frame of an image can also be effectively improved, so that users can see a more continuous, smooth and colorful 3D display effect.

[0054] In some embodiments, the light source timing controller is configured to time-stagger the illumination time of the monochromatic light source required in the current time period with the illumination time of the monochromatic light source required in at least the next time period.

[0055] In this embodiment of the disclosure, the specific time period during which the monochromatic light source needs to remain on in the current time period satisfies the following condition: it does not overlap, intersect, or conflict with the lighting time of the monochromatic light source required in the next time period.

[0056] Continue to refer to Figure 1 The display driving device 150 drives the composite pixels 200 of the multi-view naked-eye 3D display 110 based on the display driving signal of the 3D processing device 130. In some embodiments, the display driving device 150 includes a row driver, a column driver, and a light source timing controller connecting the row driver and the column driver. Figure 5 A schematic diagram is shown illustrating how a 3D processing device controls a display driving device to drive corresponding pixels 210 in the composite pixels 200 of a multi-view naked-eye 3D display. As shown, the 3D processing device 130 is communicatively connected to a display timing controller 151 and sends display driving signals. Based on the display driving signals, the display timing controller 151 controls the row driver 1511 and the column driver 1512 to perform row scanning and column scanning processes, respectively.

[0057] For example, the corresponding pixels in the composite pixels of the x columns and y rows of the multi-view naked-eye 3D display 110 are written using an addressing scheme. For instance, for the driving area covered by the row driver 1511 and the column driver 1512, the column driver 1512 simultaneously updates the pixels 210 in the entire row of composite pixels 200 within this area, updating sequentially from the first row to the last row, and repeating this process. The display timing controller 151 searches for 3D video data for an entire row of composite sub-pixels within one row cycle. The found 3D video data includes, for example, viewpoint-related address information data for the pixels in the entire row of composite pixels and intensity information data for the pixels contained in each composite pixel in the entire row. The display timing controller 151 obtains 3D video data from the 3D processing device 130, allocates the intensity information data to the column driver 1512, and simultaneously sends address information data to the row driver 1511 to address the entire row of composite pixels and the pixels contained therein. Figure 5 In the illustrated embodiment, the display timing controller 151 is exemplarily connected to the column driver 1512 via a Mini-LVDS interface.

[0058] The aforementioned multi-view naked-eye 3D display screen can be, for example, an LCD screen. Figure 6 An exemplary multi-view naked-eye 3D display screen 110 in the form of a liquid crystal screen is shown, including a display panel layer 2 and a lenticular lens optical composite film 1 attached to the display panel layer 2. The display panel layer 2 includes a pair of spaced-apart substrates 21 and 22, with a liquid crystal layer 25 disposed in the gap between the two substrates 21 and 22. The substrates 21 and 22 may be, for example, glass substrates. Liquid crystal material may be directly filled between the pair of substrates 21 and 22 to form the liquid crystal layer 25. Stops may be provided between the substrates 21 and 22 to prevent the liquid crystal layer 25 from overflowing from the periphery of the substrates 21 and 22. Alternatively, the liquid crystal material may be pre-filled in a covering material to form a liquid crystal package, and then the liquid crystal package may be filled between the substrates 21 and 22 to form the liquid crystal layer 25. Electrodes (including common electrodes and pixel electrodes, not shown) are attached to the surface of the substrate 21 facing the substrate 22, while the lenticular lens optical composite film 1 is attached to the surface of the substrate 21 facing away from the substrate 22. A display driving circuit 23 is attached to the surface of substrate 22 facing substrate 21, while another polarizer 26 is attached to the surface of substrate 22 facing away from substrate 21. When current passes through the display driving circuit 23 and generates a change in electric field, the liquid crystal molecules in the liquid crystal layer 25 are deflected, thereby changing the polarity of the light. The aforementioned light source device can be disposed on the side of substrate 22 facing away from substrate 21.

[0059] A cylindrical lens optical composite film 1 is attached to the surface of the display panel layer 2 to modulate the light emitted from the display panel layer 2 to produce contrast and multiple viewpoints, thereby providing a realistic 3D visual effect. Figure 7A schematic diagram of the structure of a lenticular lens composite film 1 according to an embodiment of the present disclosure is shown, wherein the lenticular lens composite film 1 exists as a separate product not yet assembled with the display panel layer 2. In the illustrated embodiment, the lenticular lens grating 11 and the polarizer 12 of the lenticular lens composite film 1 are bonded together, for example, by an adhesive such as pressure-sensitive adhesive. A protective film 10 is attached to the surface of the polarizer 12 opposite to the lenticular lens grating 11 for the purpose of facilitating storage and transportation of the lenticular lens composite film 1. A release film 13 may also be attached to the surface of the polarizer 12 opposite to the lenticular lens grating 11. The release film 13 can be bonded to the polarizer 12 with an adhesive, for example, with a thickness of 0.10 mm, thus having almost no effect on the thickness of the lenticular lens composite film. Pressure-sensitive adhesive may be selected as the adhesive. When attaching the lenticular lens composite film 1 to the display panel layer 2, the release film 13 is peeled off to expose the adhesive, and then the lenticular lens composite film 1 is bonded to the substrate 21 of the display panel layer 2.

[0060] The cylindrical lens grating 11 in the cylindrical lens optical composite film 1 serves as a light output directional element, capable of refracting light into different directions. Figure 8 A cross-sectional view is shown of a schematic diagram of the lenticular lens grating 11 provided according to an embodiment of the present disclosure. In the illustrated embodiment, the plano-convex lenticular lens array 112 and the plano-concave lenticular lens array 113 of the lenticular lens grating 11 are combined to form a prismatic-free lens array. The outer surface of the prismatic-free lens array (i.e., the opposing surfaces of the plano-convex lenticular lens array 112 and the plano-concave lenticular lens array 113) is a flat surface. (See reference...) Figure 8 The plano-convex cylindrical lens array 112 has a flat surface on one side and is composed of multiple convex arc surfaces on the other side. Similarly, the plano-concave cylindrical lens array 113 has a flat surface on one side and is composed of multiple concave arc surfaces on the other side. The concave arc surfaces of the plano-concave cylindrical lens array 113 and the convex arc surfaces of the plano-convex cylindrical lens array 112 complement each other. The plano-convex cylindrical lens array 112 can be considered as a combination of multiple plano-convex cylindrical lenses 1121 arranged side-by-side, each having a longitudinal axis that is parallel to each other. The plano-concave cylindrical lens array 113 can be considered as a combination of multiple plano-concave cylindrical lenses 1131 arranged side-by-side, with their longitudinal axes parallel to each other. Figure 8 The diagram shows a plano-convex cylindrical lens array 112 consisting of 5 plano-convex cylindrical lenses 1211 and a plano-concave cylindrical lens array 113 consisting of 5 plano-concave cylindrical lenses 1311, but the specific number can be increased or decreased depending on the situation.

[0061] The plano-convex cylindrical lens array 112 and the plano-concave cylindrical lens array 113 have a difference in refractive index. This difference can be smaller than the refractive index difference between a conventional lens and air. In the embodiments provided in this disclosure, the refractive index n1 of the plano-convex cylindrical lens array 112 is higher than the refractive index n2 of the plano-concave cylindrical lens array 113. Optionally, the refractive index difference n between the plano-convex cylindrical lens array 112 and the plano-concave cylindrical lens array 113 is... △ The refractive index n1 can be approximately 0.1 to 0.3, for example, approximately 0.15 to 0.25, or for example, approximately 0.2. Optionally, the refractive index n1 of the plano-convex cylindrical lens array 112 can be approximately 1.56 to 1.66, for example, approximately 1.61. Optionally, the refractive index n2 of the plano-concave cylindrical lens array 113 is approximately 1.36 to 1.46, for example, approximately 1.41. The plano-convex cylindrical lens array 112 and the plano-concave cylindrical lens array 113 are directly bonded together in a complementary manner, with no air gap between them, avoiding adverse effects on the light output of the cylindrical lens grating caused by air gaps and large refractive index differences between the individual cylindrical lens arrays. The small refractive index difference between the two bonded cylindrical lens arrays reduces light output crosstalk and reduces the observer's dependence on the viewing angle when viewing a stereoscopic image, thereby providing greater freedom of use. This cylindrical lens array also has a smaller reflectance, resulting in less interference in the observed image.

[0062] Continue to refer to Figure 8 Furthermore, by considering the lens spacing P of the plano-convex cylindrical lens array 112 in the cylindrical lens grating 11, the desired effect can be further optimized. For example... Figure 8 As shown, the cylinder spacing P is the width of the plano-convex cylinder 1121 measured in the curvature direction, obtained by measurement along the longitudinal axis perpendicular to the plano-convex cylinder 1121. In a multi-view naked-eye stereoscopic display, one plano-convex cylinder 1121 can cover multiple composite pixels or pixels. Multiple viewpoints, such as 4, 5, or 6 viewpoints, are formed by combining composite pixels or pixels with plano-convex cylinders. The cylinder spacing P can range from 123.000 to 125.000 μm, for example, from 123.500 to 124.500 μm, or for example, 124.432 μm.

[0063] The plano-convex lenticular lens array 112 in the lenticular lens grating 11 can be oriented relative to the pixel rows or columns. For example, the longitudinal axis of any plano-convex lenticular lens 1121 in the plano-convex lenticular lens array 112 can be tilted at a certain angle relative to the pixel column direction. Optionally, the tilt angle is about 5° to 45°, for example, about 10° to 40°, or for example, about 15° to 35°, or for example, about 20° to 30°, or for example, 25°. This tilt helps to reduce moiré patterns.

[0064] The plano-convex cylindrical lens array 112 and the plano-concave cylindrical lens array 113 can be made of the same or different materials. The selected materials can be one of the following materials or any combination thereof: acrylic resin materials, polymer materials such as polycarbonate or polyurethane materials, silicone materials, unsaturated polyester materials, epoxy resin materials or other suitable transparent materials. Figure 4 The diagram shows that the outer surface of the prismless lens array has substrates 111 and 114 attached, and an adhesive layer 115, such as pressure-sensitive adhesive, is applied to substrate 114, which is located away from the high-refractive-index plano-convex cylindrical lens array 112, to bond the polarizer 12. Substrates 111 and 114 may be made of thermoplastic polyester material, such as polyester resin (PET). The thickness of substrates 111 and 114 is approximately 0.1 mm to minimize the overall thickness of the cylindrical lens optical composite film. If the prismless lens array composed of the plano-convex cylindrical lens array 113 and the plano-concave cylindrical lens array 113 is sufficiently robust, at least one of substrates 111 and 114 may be omitted.

[0065] The plano-convex cylindrical lens array 112 and the plano-concave cylindrical lens array 113 involved in the embodiments of this disclosure can be non-switchable cylindrical lenses, that is, they each have fixed optical properties. In this way, the plano-convex cylindrical lens array 112 and the plano-concave cylindrical lens array 113 are always in lens mode under any circumstances.

[0066] Figure 9 A cross-sectional view is shown of a structural schematic diagram of another cylindrical lens grating 11 provided according to an embodiment of the present disclosure. Figure 9 The cylindrical grating 11 in the middle and Figure 8 The difference in the cylindrical grating 11 is that, in Figure 9 In the cylindrical lens grating, the polarizer 12 is attached to the cylindrical lens grating 11 and is closer to the plano-convex cylindrical lens array 112 than the plano-concave cylindrical lens array 113. The refractive indices of the plano-convex cylindrical lens array 112 and the plano-concave cylindrical lens array 113, as well as the difference in refractive indices between them, can be found in [reference needed]. Figure 8 The illustrated embodiment.

[0067] In the aforementioned cylindrical lens arrays, both the plano-convex cylindrical lens in the plano-convex cylindrical lens array and the plano-concave cylindrical lens in the plano-concave cylindrical lens array have a single axis. In addition, other lenses with two intersecting axes (e.g., two perpendicularly intersecting axes) are also applicable. In this case, a plano-concave lens array is formed by multiple plano-concave lenses, each with two intersecting axes, and a plano-convex lens array is formed by multiple plano-convex lenses, each with two intersecting axes. The plano-concave and plano-convex lens arrays are bonded together in a complementary manner to form a prismless lens array, wherein the refractive index of the plano-convex lens array is higher than that of the plano-concave lens array. A polarizer is attached to a lens grating to form a lens optical composite film. In some embodiments, the grating may include a spherical lens and a concave lens that is complementary to the spherical lens. The refractive index of the spherical lens is different from that of the concave lens. Here, the spherical lens can also be replaced by a truncated spherical lens.

[0068] According to embodiments of this disclosure, the display and its components are reconstructed based on glasses-free 3D display. Components that are typically found in 2D displays are combined with grating materials, simplifying the overall manufacturing process and significantly reducing process costs. In existing glasses-free 3D displays, the polarizer and grating are aligned and bonded to the display components in separate processes, and the grating is usually made of soft material, increasing the difficulty of alignment and bonding. This application combines the polarizer with the lenticular lens grating and processes them independently of the display panel assembly. The polarizer does not need to be aligned with the lenticular lens grating; the polarizer and lenticular lens grating can be bonded to the display panel together in one step, saving processes. In addition, the combination of the polarizer and the lenticular lens grating increases the rigidity of the lenticular lens grating, which is beneficial for alignment and bonding. Using the lenticular lens optical composite film of this application, there is no need for additional auxiliary alignment tools such as alignment marks and substrates, reducing the process difficulty. The outward-facing surfaces of the two lenticular lens arrays in the lenticular lens grating are planar, making them easy to clean and install using auxiliary mounting tools such as suction cups.

[0069] In some embodiments, the light source device includes a blue light source and a blue light selective filter disposed on the light-emitting side of the blue light source. Figure 10 A schematic diagram of a blue light selective filter 400 installed in a field-series display is shown. As shown, the blue light selective filter 400 is positioned downstream of the light emission path of the blue light source 310B to filter the blue light emitted by the blue light source 310B, thereby preventing harmful wavelengths of blue light from harming the user. Considering that the harmful wavelengths of blue light are close to ultraviolet wavelengths, the blue light selective filter 400 can be configured to filter blue light close to ultraviolet wavelengths.

[0070] In some embodiments, the blue light selective filter is configured to block blue light with wavelengths less than a certain wavelength, such as 450 nm, 445 nm, or 440 nm, from passing through, while allowing blue light with wavelengths greater than or equal to a certain wavelength, such as 450 nm, 445 nm, or 440 nm, to pass through a narrowband filter, thereby filtering out blue light with wavelengths less than a certain value. This narrowband filter can be fitted onto a blue light source.

[0071] According to embodiments of this disclosure, a display control method for a field sequence display is provided. For example... Figure 11 As shown, the display control method includes:

[0072] S10, connect the monochromatic light source required for the current time period;

[0073] S20, determine the monochromatic light source required for at least the next time period that is temporally adjacent to the monochromatic light source required for the current time period;

[0074] S30: After keeping the monochromatic light source required for the current time period on for a certain period of time, pre-connect the monochromatic light source required for at least the next time period.

[0075] The above display control method can be implemented by a light source timing controller.

[0076] In some embodiments, pre-activating the monochromatic light source required for at least the next time period includes: determining a circuit response time; based on the circuit response time, pre-activating the monochromatic light source required for at least the next time period for a certain period after maintaining the current time period's monochromatic light source on; wherein the circuit response time is the time required from the monochromatic light source being activated to its illumination.

[0077] In some embodiments, the display control method further includes staggering the illumination time of the monochromatic light source required in the current time period with the illumination time of the monochromatic light source required in at least the next time period.

[0078] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of this disclosure includes the entire scope of the claims and all available equivalents of the claims. The terminology used in this application is for descriptive purposes only and is not intended to limit the claims. When used in this application, the term "comprising" etc., means the presence of at least one of the stated features, but does not exclude the presence of other features.

[0079] Those skilled in the art will recognize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Those skilled in the art may use different methods for each specific application to implement the described functionality, but such implementation should not be considered beyond the scope of the embodiments disclosed herein.

[0080] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed between each other may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may not be physical units. Some or all of the units can be selected to implement this embodiment according to actual needs. Furthermore, each functional unit in the embodiments of this disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0081] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description; sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A field sequential display, characterized by Comprise: a multi-view naked-eye 3D display screen comprising a plurality of composite pixels, each of the plurality of composite pixels comprising a plurality of pixels corresponding to a plurality of views of the field sequential display; a light source device comprising a plurality of monochromatic light sources; a light source timing controller configured to control the on and off time of the plurality of monochromatic light sources; and a 3D processing device in communication connection with the light source timing controller and the multi-view naked-eye 3D display screen, and configured to cause the light source timing controller to switch on at least part of the plurality of monochromatic light sources in a time sequence to render a corresponding pixel in each of the composite pixels in the multi-view naked-eye 3D display screen; wherein the light source timing controller is further configured to turn on the light source driving circuit in a time sequence based on the signal of the 3D processing device to turn on at least part of the plurality of monochromatic light sources, pre-illuminate at least the next period required monochromatic light source adjacent in time to the current period required monochromatic light source within a certain period of time after the current period required monochromatic light source is kept on, wherein the certain period of time that the current period required monochromatic light source is kept on meets: does not overlap, cross or conflict with the lighting time of the next period required monochromatic light source; wherein the 3D processing device is configured to process a 3D video signal, the 3D video being composed of a plurality of images, each image being composed of a plurality of sub-frames, each sub-frame being a color image rendered by a composite pixel based on a monochromatic light source.

2. A field sequential display according to claim 1, characterized in that The light source timing controller is configured to pre-illuminate the at least next period required monochromatic light source within a certain period of time after the current period required monochromatic light source is kept on based on the circuit response time; wherein the circuit response time is the time required from the monochromatic light source being turned on to being illuminated.

3. A field sequential display according to claim 1 or 2, characterized in that The plurality of monochromatic light sources comprises at least one of red light sources, green light sources and blue light sources.

4. A field sequential display according to claim 1 or 2, characterized in that The multi-view naked-eye 3D display screen comprises: a display panel comprising the plurality of composite pixels; and a grating covering the plurality of composite pixels of the display panel; wherein the grating comprises a first lens array and a second lens array, the surfaces of the first lens array and the second lens array facing away from each other are planar, and the surfaces of the first lens array and the second lens array facing each other are complementary in concave-convex.

5. A field sequential display according to claim 4, wherein One of the first lens array and the second lens array is a plano-convex lens array, and the other is a plano-concave lens array, and the refractive index of the plano-convex lens array is higher than that of the plano-concave lens array.

6. A field sequential display according to claim 1 or 2, characterized in that The plurality of monochromatic light sources comprises blue light sources; The field sequential display comprises: a blue light selection filtering device arranged on the light emitting side of the blue light source and configured to selectively filter blue light.

7. A field sequential display according to claim 6, wherein The blue light selection filtering device is configured to filter blue light close to ultraviolet wavelength.

8. A field sequential display according to claim 7, characterised in that, The blue light selection filtering device is configured as a narrow-band light filter that allows blue light with a wavelength greater than or equal to 440 nm to pass through.

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