Display device, driving method thereof and projection device

Abstract

The invention provides a display device, a driving method thereof and a projection device. The display device comprises a display panel, a backlight module and a control circuit. The backlight module comprises a color conversion plate, a lamp plate and a driving part, wherein the color conversion plate and the lamp plate are arranged on the light incident side of the display panel. The lamp panel comprises a first light-emitting element, a second light-emitting element and a third light-emitting element which are different in light emitting color. The color conversion plate comprises a first color conversion area, a second color conversion area and a transparent area; the driving part is connected with the color conversion plate and / or the lamp panel and is used for driving the lamp panel and the color conversion plate to rotate relatively according to a preset frequency, so that the color conversion plate sequentially switches zone positions: in the first zone position, the transparent zone allows the first color light to penetrate, and the first color conversion zone converts the light of the third light-emitting element into the first color light and allows the first color light to penetrate; the transparent area enables the second colored light to penetrate through, and the second color conversion area converts the light of the third light-emitting element into the second colored light and enables the second colored light to penetrate through; and the third zone and the transparent zone allow the third color light to pass through. The display device can effectively improve the transmittance.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device, its driving method, and a projection device. Background Technology

[0002] With the rapid development of projection display technology, especially the popularization of single panel liquid crystal display (1LCD) technology, projection display devices have moved from office environments into ordinary homes due to their advantages such as simple structure, affordable price, natural colors and low dynamic blur.

[0003] Typically, an LCD includes a light source, a color LCD panel, and a lens. When displaying, the light source emits white light, which passes through the color LCD panel. The color LCD panel switches pixels according to the image signal to filter out the color image, which is then transmitted and magnified through the lens to display the image.

[0004] However, due to the inherently low transmittance of 1LCD display panels, typically less than 8%, even when paired with an Advanced Polarizer Film (APF), the transmittance of 1LCD is no higher than 10%, resulting in low brightness and high power consumption. Summary of the Invention

[0005] This application provides a display device, its driving method, and a projection device, aiming to solve the problems of low brightness and high power consumption caused by low transmittance of the display panel in the prior art of 1LCD.

[0006] To address the aforementioned technical problems, the first technical solution provided in this application is: to provide a display device, comprising:

[0007] The display panel includes multiple sub-pixel units arranged in an array, each sub-pixel unit being turned on or off according to a corresponding driving signal;

[0008] The backlight module includes a lamp board and a color conversion board; the color conversion board is located on the light-incident side of the display panel, and the lamp board is located on the side of the color conversion board away from the display panel;

[0009] The control circuit is used to control the light panel to emit light and to provide image data signals to the display panel;

[0010] The light panel includes a first light-emitting element, a second light-emitting element, and a third light-emitting element that emit different colors; the color conversion panel includes a first color conversion area, a second color conversion area, and a transparent area.

[0011] The backlight module also includes a driver unit connected to the color conversion plate and / or the lamp plate, used to drive the lamp plate and the color conversion plate to rotate relative to each other at a preset frequency, so that the color conversion plate sequentially switches between the first zone, the second zone and the third zone;

[0012] In the first region, the transparent region is used to allow the first color light of the first light-emitting element to pass through, and the first color conversion region is used to convert the light of the third light-emitting element into the first color light and allow it to pass through;

[0013] In the second region, the transparent region is used to allow the second color light of the second light-emitting element to pass through, and the second color conversion region is used to convert the light of the third light-emitting element into the second color light and allow it to pass through;

[0014] In the third region, the transparent region is used to allow the third color light of the third light-emitting element to pass through.

[0015] In some embodiments, the driving element is electrically connected to the control circuit so that the control circuit controls the driving element to drive the lamp panel and / or color conversion panel to rotate relative to each other at a preset frequency;

[0016] The control circuit is also used to control the lamp panel to sequentially switch between the first light source mode, the second light source mode, and the third light source mode at a preset frequency; among which,

[0017] In the first light source mode, the color conversion plate is located in the first area, and the control circuit is used to control the first light-emitting element and the third light-emitting element to emit light, so that the backlight module provides the first color light to the display panel;

[0018] In the second light source mode, the color conversion plate is located in the second zone, and the control circuit is used to control the second and third light-emitting elements to emit light so that the backlight module provides the second color light to the display panel.

[0019] In the third light source mode, the color conversion plate is located in the third zone, and the control circuit is used to control the third light-emitting element to emit light so that the backlight module provides the third color light to the display panel.

[0020] In some implementations, the control circuit is also used to receive image information and process the image information to generate first image data information corresponding to the first color light, second image data information corresponding to the second color light, and third image data information corresponding to the third color light.

[0021] The display panel is used to receive first image data information, second image data information and third image data information, and sequentially refresh and display the first image, second image and third image at a preset refresh rate; the preset refresh rate is 3n times the preset frequency, where n is a positive integer.

[0022] In some embodiments, the color conversion panel includes a first color conversion layer and a second color conversion layer with different colors;

[0023] A first color conversion layer is disposed in the first color conversion region and is used to absorb the third color light and emit the first color light; the material of the first color conversion layer includes a fluorescent material or a quantum dot material of the first color;

[0024] The second color conversion layer is disposed in the second color conversion region and is used to absorb the third color light and emit the second color light; the material of the second color conversion layer includes fluorescent materials or quantum dot materials of the second color.

[0025] In some embodiments, the color conversion panel further includes a first filter layer and a second filter layer; the first filter layer is stacked on the side of the first color conversion layer away from the lamp panel and is used to filter out the first color light; the second filter layer is stacked on the side of the second color conversion layer away from the lamp panel and is used to filter out the second color light.

[0026] In some embodiments, the color conversion plate is circular, and the first color conversion area, the second color conversion area, and the transparent area are sectors with equal central angles;

[0027] A light-shielding area is provided between the first color conversion area and the second color conversion area, between the second color conversion area and the transparent area, and between the transparent area and the first color conversion area. The light-shielding area is fan-shaped, and the central angle of the light-shielding area ranges from 1° to 15°.

[0028] In some embodiments, the backlight module further includes a light shield, which includes connected sidewalls and a top wall; enclosing a color conversion plate, a first light-emitting element, a second light-emitting element, and a third light-emitting element; the top wall extends to the side of the color conversion plate away from the lamp panel, and the orthographic projection of the top wall onto the color conversion plate falls on the color conversion plate; wherein, a reflective layer is provided on the side of the light shield near the lamp panel and the color conversion plate.

[0029] In some embodiments, the backlight module further includes an airflow guide, which is disposed on the side of the color conversion plate near the lamp plate and located at the center of the color conversion plate. It is used to generate a heat dissipation airflow when the color conversion plate and the lamp plate rotate relative to each other. The heat dissipation airflow flows from the airflow guide to the lamp plate to dissipate heat from the lamp plate.

[0030] To address the aforementioned technical problems, the second technical solution provided in this application is: a driving method for a display device, used to drive the display device as described in the above embodiments; the driving method includes:

[0031] The control driver drives the lamp panel and the color conversion panel to rotate relative to each other at a preset frequency, so that the color conversion panel sequentially switches between the first zone, the second zone, and the third zone. In the first zone, the transparent zone allows the first color light from the first light-emitting element to pass through, and the first color conversion zone converts the light from the third light-emitting element into the first color light and allows it to pass through. In the second zone, the transparent zone allows the second color light from the second light-emitting element to pass through, and the second color conversion zone converts the light from the third light-emitting element into the second color light and allows it to pass through. In the third zone, the transparent zone allows the third color light from the third light-emitting element to pass through.

[0032] Based on the location signal, the control panel sequentially switches between a first light source mode, a second light source mode, and a third light source mode at a preset frequency. In the first light source mode, the color conversion panel is located in the first location and controls the first and third light-emitting elements to emit light, so that the backlight module provides a first color of light. In the second light source mode, the color conversion panel is located in the second location and controls the second and third light-emitting elements to emit light, so that the backlight module provides a second color of light. In the third light source mode, the color conversion panel is located in the third location and controls the third light-emitting element to emit light, so that the backlight module provides a third color of light.

[0033] Receive image information, process the image information, and generate first image data information corresponding to the first color light, second image data information corresponding to the second color light, and third image data information corresponding to the third color light;

[0034] The display panel is driven according to the first image data information, the second image data information and the third image data information, so that the display panel sequentially refreshes and displays the first image, the second image and the third image at a preset refresh rate; wherein, the preset refresh rate is 3n times the preset frequency, and n is a positive integer.

[0035] To address the aforementioned technical problems, the third technical solution provided in this application is: to provide a projection device, which includes:

[0036] case;

[0037] A display device is disposed within the housing, and the display device is the one provided in the above embodiments;

[0038] A lens assembly, including at least one lens, is disposed on the housing and located in the light path of the emitted light from the display device, for adjusting the magnification and sharpness of the image.

[0039] The beneficial effects of this application are as follows: Unlike existing technologies, this application provides a display device, its driving method, and a projection device. The embodiments of this application dynamically switch the positions of the color conversion zone and the transparent zone, enabling efficient utilization of the light energy of different light-emitting elements and avoiding energy loss caused by the absorption of monochromatic light by filters in traditional backlight modules. Furthermore, the first and second color conversion zones convert the light from the third light-emitting element into the desired color, reducing dependence on independent light sources and lowering overall power consumption. The transparent zone directly transmits the corresponding color light, maintaining brightness, and the rotation switching mechanism allows the three primary colors to be distributed as needed, improving display brightness and color performance. The periodic driving of the driving component keeps the color conversion plate in motion, preventing localized light decay and extending the lifespan of the backlight module. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of a display device provided in an embodiment of the related art;

[0042] Figure 2 This is a schematic diagram of the structure of the display device provided in the first embodiment of this application;

[0043] Figure 3 This is a schematic flowchart of a driving method for a display device provided in one embodiment of this application;

[0044] Figure 4 This is a schematic diagram of the structure of the display device provided in the second embodiment of this application;

[0045] Figure 5 This is a schematic diagram of the structure of the first-position color conversion plate and the lamp plate provided in an embodiment of this application;

[0046] Figure 6 This is a schematic diagram of the structure of the second-position color conversion plate and the lamp plate provided in an embodiment of this application;

[0047] Figure 7 This is a schematic diagram of the structure of the third-position color conversion plate and the lamp plate provided in an embodiment of this application;

[0048] Figure 8 This is a longitudinal cross-sectional structural diagram of the color conversion plate provided in the first embodiment of this application;

[0049] Figure 9This is a schematic diagram of a longitudinal cross-sectional structure of a color conversion plate provided in the second embodiment of this application;

[0050] Figure 10 This is a schematic diagram of the planar structure of the color conversion plate provided in the third embodiment of this application;

[0051] Figure 11 This is a schematic diagram of the structure of a backlight module provided in one embodiment of this application;

[0052] Figure 12 This is a schematic diagram of the structure of a backlight module provided in another embodiment of this application;

[0053] Figure 13 This is a schematic flowchart of a driving method for a display device provided in another embodiment of this application;

[0054] Figure 14 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application;

[0055] Figure label:

[0056] 10. Projection device; 20. Display device; 30. Housing; 40. Lens assembly; 50. Heat sink; 60. Fan; 70. Battery module; 80. Speaker; 90. Interactive button / voice control panel; 11. Reflector; 21. Display panel; 210. Subpixel unit; 211. Lower polarizer; 212. Driving substrate; 213. Liquid crystal layer; 214. Color filter substrate; 215. Alignment substrate; 216. Upper polarizer; 217. First Fresnel lens; 218. Second Fresnel lens; 22. Lamp panel; 221. First 222. Light-emitting element; 223. Second light-emitting element; 224. Third light-emitting element; 225. Lamp board substrate; 23. Control circuit; 24. Backlight module; 25. Color conversion plate; 250. Color conversion substrate; 26. Driving component; 28. Airflow guide component; 100. First area; 200. Second area; 300. Third area; 251. First color conversion area; 252. Second color conversion area; 253. Transparent area; 254. First filter layer; 255. Second filter layer; 256. Light-shielding area; 27. Light shield; 271. Reflective layer. Detailed Implementation

[0057] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0058] In the following description, specific details such as particular system architectures, interfaces, and technologies are presented for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of this application.

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0060] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0061] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0062] Please see Figure 1 , Figure 1 This is a schematic diagram of a display device provided in an embodiment of related technology. In this embodiment, a display device 20 is provided, which includes:

[0063] The display panel 21 includes a lower polarizer 211, a driving substrate 212, a liquid crystal layer 213, a color filter substrate 214 and an upper polarizer 216 stacked in sequence.

[0064] The light panel 22 is disposed on the light-incident side of the display panel 21;

[0065] The control circuit 23 is used to control the light panel 22 to emit light and to provide image data signals to the display panel 21.

[0066] The lamp panel 22 provides white backlight to the display panel 21. In one embodiment, the lamp panel 22 includes a light-emitting element that emits white light. In another embodiment, the lamp panel 22 includes a red light-emitting element, a green light-emitting element, and a blue light-emitting element; when the lamp panel 22 is working, the red, green, and blue light-emitting elements emit light together with the same intensity, causing the red, green, and blue light to mix and form white light, which is then provided to the display panel 21. The light-emitting element can specifically be one or more of a light-emitting diode (LED), a mini light-emitting diode (Mini-LED), or a micro light-emitting diode (Micro-LED), and can be configured according to actual needs.

[0067] A lower polarizer 211, a driving substrate 212, a liquid crystal layer 213, a color filter substrate 214, and an upper polarizer 216 are sequentially stacked on the light-emitting side of the lamp panel 22. The lower polarizer 211 filters the light emitted from the lamp panel 22, converting unpolarized light into linearly polarized light. The driving substrate 212 and the color filter substrate 214 are positioned opposite each other, and the liquid crystal layer 213 is disposed between the driving substrate 212 and the color filter substrate 214. A pixel-level electric field is formed between the driving substrate 212 and the color filter substrate 214 to control the deflection angle of the liquid crystal located in the electric field, thereby causing the linearly polarized light passing through the lower polarizer 211 to be partially emitted after being deflected by the liquid crystal, thus displaying the corresponding grayscale. The color filter substrate 214 also includes a red filter layer, a green filter layer, and a blue filter layer arranged in a pixel-by-pixel structure to decompose white light into red, green, and blue primary colors through the RGB three-color filtering principle, thereby cooperating with the liquid crystal control to achieve the display of color images. An upper polarizer 216 is disposed on the side of the substrate 215 away from the liquid crystal layer 213, and is used to control the emission of light passing through the liquid crystal layer 213, thereby displaying corresponding grayscale brightness. The polarization direction of the upper polarizer 216 matches the polarization direction of the lower polarizer 211, and can be specifically set according to the type of liquid crystal panel. For example, if the liquid crystal panel is a vertical alignment (VA) type, the polarization direction of the upper polarizer 216 is perpendicular to the polarization direction of the lower polarizer 211. The lower polarizer 211 can specifically be an advanced polarizer film (APF) to improve the light transmittance of the display panel 21.

[0068] The control circuit 23 is electrically connected to the lamp board 22 and the driving substrate 212. It is used to control the lamp board 22 to emit light so as to provide white backlight to the display panel 21. It is also used to provide image data signals to the display panel 21 so as to control the formation of a pixel-level electric field corresponding to the image between the driving substrate 212 and the color filter substrate 214, thereby displaying the corresponding image.

[0069] However, in this embodiment, due to the inherently low transmittance of the display panel 21, which is usually less than 8%, even with the addition of an APF, the transmittance of the display panel 21 is not higher than 10%, resulting in low brightness and high power consumption of the display device 20.

[0070] To address the aforementioned technical problems, this application provides a display device 20, which includes:

[0071] The display panel 21 includes a lower polarizer 211, a driving substrate 212, a display functional layer, a counter substrate 215, and an upper polarizer 216 stacked in sequence.

[0072] The backlight module 24 includes a lamp board 22, which is disposed on the light-incident side of the display panel 21.

[0073] Control circuit 23 is used to control the light panel 22 to emit light and to provide image data signals to display panel 21;

[0074] The lamp panel 22 includes a first light-emitting element 221, a second light-emitting element 222, and a third light-emitting element 223, each emitting a different color. The control circuit 23 controls the lamp panel 22 to sequentially switch between a first light source mode, a second light source mode, and a third light source mode at a preset frequency. In the first light source mode, only the first light-emitting element 221 emits light, enabling the backlight module 24 to provide a first color of light to the display panel 21. In the second light source mode, only the second light-emitting element 222 emits light, enabling the backlight module 24 to provide a second color of light to the display panel 21. In the third light source mode, only the third light-emitting element 223 emits light, enabling the backlight module 24 to provide a third color of light to the display panel 21. It should be noted that the preset frequency in this embodiment refers to the number of times the lamp panel 22 switches between the first light source mode (or the second light source mode, or the third light source mode) per unit time, specifically in Hertz (Hz).

[0075] In this embodiment, a three-color light panel 22 is used, which includes a first light-emitting element 221, a second light-emitting element 222, and a third light-emitting element 223 with different emitting colors. The control circuit 23 controls the light panel 22 to sequentially switch between the first light source mode, the second light source mode, and the third light source mode at a preset frequency. This allows the first light-emitting element 221, the second light-emitting element 222, and the third light-emitting element 223 to emit light at the preset frequency, providing the first color light, the second color light, and the third color light to the display panel 21, respectively. At the same time, the control circuit 23 provides image data signals to the display panel 21, causing the display panel 21 to sequentially refresh and display the first image, the second image, and the third image at the corresponding refresh rate. By utilizing the persistence of vision effect of the human eye, the first image, the second image, and the third image are mixed to display the corresponding image, thereby achieving temporal color mixing display. Compared to a color LCD panel, the present application embodiment eliminates the need for a color filter layer in the display panel 21 by removing the color filter layer, thereby significantly improving the light transmittance of the display panel 21, which in turn increases the brightness of the display device 20 and reduces the power consumption of the display device 20.

[0076] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0077] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of the display device provided in the first embodiment of this application. In this embodiment, a display device 20 is provided, which includes:

[0078] The display panel 21 includes a lower polarizer 211, a driving substrate 212, a display functional layer, a counter substrate 215, and an upper polarizer 216 stacked in sequence.

[0079] The backlight module 24 includes a lamp board 22, which is disposed on the light-incident side of the display panel 21.

[0080] Control circuit 23 is used to control the light panel 22 to emit light and to provide image data signals to display panel 21;

[0081] The light panel 22 includes a first light-emitting element 221, a second light-emitting element 222, and a third light-emitting element 223, each emitting a different color. The control circuit 23 controls the light panel 22 to sequentially switch between a first light source mode, a second light source mode, and a third light source mode at a preset frequency. In the first light source mode, only the first light-emitting element 221 emits light, so that the backlight module 24 provides a first color light to the display panel 21. In the second light source mode, only the second light-emitting element 222 emits light, so that the backlight module 24 provides a second color light to the display panel 21. In the third light source mode, only the third light-emitting element 223 emits light, so that the backlight module 24 provides a third color light to the display panel 21.

[0082] Specifically, a lower polarizer 211, a driving substrate 212, a display functional layer, a counter substrate 215, and an upper polarizer 216 are sequentially stacked on the light-emitting side of the lamp panel 22. The lower polarizer 211 filters the light emitted from the lamp panel 22, converting unpolarized light into linearly polarized light. The driving substrate 212 and the counter substrate 215 are positioned opposite each other, and the display functional layer is disposed between the driving substrate 212 and the counter substrate 215. A pixel-level electric field is formed between the driving substrate 212 and the counter substrate 215 to control the transmittance of the portion of the display functional layer located in the electric field to linearly polarized light, thereby displaying the corresponding grayscale brightness. In a specific embodiment, the display functional layer is a liquid crystal layer 213. A pixel-level electric field is formed between the driving substrate 212 and the counter substrate 215 to control the deflection angle of the liquid crystal located in the electric field, so that the linearly polarized light passing through the lower polarizer 211 is partially emitted after being deflected by the liquid crystal, thereby displaying the corresponding grayscale brightness. In other embodiments, the display functional layer can also be other types of film layers used to regulate light transmittance, which can be specifically set according to actual needs. The upper polarizer 216 is disposed on the side of the substrate 215 away from the display functional layer, and is used to control the emission of light passing through the liquid crystal layer 213, thereby displaying corresponding grayscale brightness or black. The polarization direction of the upper polarizer 216 matches the polarization direction of the lower polarizer 211, and can be specifically set according to the type of the display panel 21. For example, if the display panel 21 is a vertical alignment (VA) type liquid crystal panel, then the polarization direction of the upper polarizer 216 and the polarization direction of the lower polarizer 211 are perpendicular to each other. The lower polarizer 211 can specifically be an advanced polarizer film (APF) to further improve the light transmittance of the display panel 21.

[0083] The light panel 22 is disposed on the light-incident side of the display panel 21 and includes a first light-emitting element 221, a second light-emitting element 222, and a third light-emitting element 223, each emitting a different color. The first light-emitting element 221, the second light-emitting element 222, and the third light-emitting element 223 can respectively emit a first color light, a second color light, and a third color light; in a specific embodiment, the first color light, the second color light, and the third color light can be red light, green light, and blue light, respectively, that is, the first light-emitting element 221, the second light-emitting element 222, and the third light-emitting element 223 emit the three primary colors of light. The light-emitting elements can be one or more of LED, Mini-LED, or Micro-LED, and the specific configuration can be determined according to actual needs.

[0084] The control circuit 23 is electrically connected to the lamp board 22 and the display panel 21, and is used to control the lamp board 22 to emit light and provide image data signals to the display panel 21. Specifically, during display operation, the control circuit 23 controls the lamp board 22 to sequentially switch the illumination of the first light-emitting element 221, the second light-emitting element 222, and the third light-emitting element 223 at a preset frequency, so that the lamp board 22 sequentially switches between the first light source mode, the second light source mode, and the third light source mode at a preset frequency, so as to provide the first color light, the second color light, and the third color light to the display panel 21 at a preset frequency. At the same time, the control circuit 23 is electrically connected to the driving substrate 212 to provide the corresponding image data signals to the driving substrate 212, so that the display panel 21 sequentially refreshes and displays the first image, the second image, and the third image at a refresh rate corresponding to the preset frequency. Utilizing the persistence of vision effect of the human eye, the first image, the second image, and the third image are mixed to display the corresponding picture, thereby realizing temporal mixed color display.

[0085] In this embodiment, a three-color light panel 22 is used, which includes a first light-emitting element 221, a second light-emitting element 222, and a third light-emitting element 223 with different emitting colors. The control circuit 23 controls the light panel 22 to sequentially switch between the first light source mode, the second light source mode, and the third light source mode at a preset frequency. This allows the first light-emitting element 221, the second light-emitting element 222, and the third light-emitting element 223 to emit light at the preset frequency, providing the first color light, the second color light, and the third color light to the display panel 21, respectively. At the same time, the control circuit 23 provides image data signals to the display panel 21, causing the display panel 21 to sequentially refresh and display the first image, the second image, and the third image at the corresponding refresh rate. By utilizing the persistence of vision effect of the human eye, the first image, the second image, and the third image are mixed to display the corresponding image, thereby achieving temporal color mixing display. Compared to a color LCD panel, the present application embodiment eliminates the need for a color filter layer in the display panel 21 by removing the color filter layer, thereby significantly improving the light transmittance of the display panel 21, which in turn increases the brightness of the display device 20 and reduces the power consumption of the display device 20.

[0086] Please refer to the following: Figure 2 and Figure 3 , Figure 3 This is a schematic flowchart of a driving method for a display device provided in one embodiment of this application. Further, in this embodiment, a driving method for a display device 20 is also provided, which is used to drive the display device 20 provided in the above embodiments. The driving method for the display device 20 includes:

[0087] S1: Control the lamp panel 22 to sequentially switch between the first light source mode, the second light source mode and the third light source mode at a preset frequency;

[0088] S2: Receive image information, process the image information, and generate first image data information corresponding to the first light source mode, second image data information corresponding to the second light source mode, and third image data information corresponding to the third light source mode.

[0089] S3: Drive the display panel 21 according to the first image data information, the second image data information and the third image data information, so that the display panel 21 sequentially refreshes and displays the first image, the second image and the third image at a preset refresh rate; wherein, the preset refresh rate is 3n times the preset frequency, and n is a positive integer.

[0090] Specifically, the driving method is executed by the control circuit 23 of the display device 20. In step S1, when the display device 20 is working, the control circuit 23 controls the lamp panel 22 to sequentially switch between the three light source modes at a preset frequency, so that the first light-emitting element 221, the second light-emitting element 222 and the third light-emitting element 223 on the lamp panel 22 are sequentially lit at a preset frequency, so as to sequentially provide the first color light, the second color light and the third color light to the display panel 21.

[0091] In step S2, the control circuit 23 receives the screen information to be displayed by the display device 20 and performs data splitting processing on the screen information, dividing it into first image data information, second image data information, and third image data information corresponding to the three channels of the first color light, the second color light, and the third color light, respectively. In specific applications, the first color light, the second color light, and the third color light are red light, green light, and blue light (RGB), which are the three primary colors of light, respectively. The control circuit 23 splits the received screen information into first image data information, second image data information, and third image data information corresponding to the three channels of RGB.

[0092] In step S3, the control circuit 23 transmits the first image data information, the second image data information, and the third image data information to the driving substrate 212 of the display panel 21, so as to drive the display panel 21 to sequentially refresh and display the first image, the second image, and the third image at a preset refresh rate. That is, the display panel 21 is driven to display image data information of different colors of light in a time-division manner to realize time-domain color mixing display. Here, the preset refresh rate is 3n times the preset frequency, where n is a positive integer. It can be understood that when the lamp board 22 switches one round of light source mode, the display panel 21 refreshes and displays one first image, one second image, and one third image respectively. The first image, one second image, and one third image are mixed to display a complete color image. Therefore, by making the preset refresh rate 3n times the preset frequency, it is ensured that the display panel 21 can complete the refresh of the complete color image, avoiding screen flickering and abnormal color problems. Here, when the lamp board 22 switches one round of light source mode, it means that it sequentially switches the first light source mode, the second light source mode, and the third light source mode once. For example, if the preset frequency is set to 60Hz, then the preset refresh rate is 180nHz, where n is a positive integer; when n=1, the preset refresh rate is 180Hz; when n=2, the preset refresh rate is 360Hz.

[0093] In this embodiment, the above-described driving method is used to drive the display device 20 to perform image display. The three light-emitting elements of the lamp panel 22 sequentially emit light alternately to provide the display panel 21 with a first color light, a second color light, and a third color light in a time-division manner, thereby achieving time-domain color mixing display. The display panel 21 does not require a color filter layer, thus eliminating the need for one, reducing light loss caused by the color filter layer, and significantly improving the light transmittance of the display panel 21. This, in turn, increases the brightness of the display device 20 and reduces its power consumption. Furthermore, by displaying image data information of different colors in a time-division manner, color performance can also be improved.

[0094] Please see Figure 4-7 , Figure 4 This is a schematic diagram of the structure of the display device provided in the second embodiment of this application. Figure 5 This is a schematic diagram of the structure of the first-position color conversion plate and the lamp plate provided in an embodiment of this application. Figure 6 This is a schematic diagram of the structure of the second-position color conversion plate and the lamp plate provided in an embodiment of this application. Figure 7 This is a schematic diagram of the structure of the third-position color conversion plate and the lamp plate provided in an embodiment of this application. In this embodiment, another display device 20 is provided, which includes:

[0095] The display panel 21 includes a plurality of sub-pixel units 210 arranged in an array, each sub-pixel unit 210 being turned on or off according to a corresponding driving signal;

[0096] The backlight module 24 includes a lamp board 22 and a color conversion board 25; the color conversion board 25 is disposed on the light-incident side of the display panel 21, and the lamp board 22 is disposed on the side of the color conversion board 25 away from the display panel 21.

[0097] Control circuit 23 is used to control the light panel 22 to emit light and to provide image data signals to display panel 21;

[0098] The light panel 22 includes a first light-emitting element 221, a second light-emitting element 222, and a third light-emitting element 223 with different light-emitting colors; the color conversion panel 25 includes a first color conversion area 251, a second color conversion area 252, and a transparent area 253.

[0099] The backlight module 24 also includes a driver 26, which is connected to the color conversion plate 25 and / or the lamp plate 22, and is used to drive the lamp plate 22 and the color conversion plate 25 to rotate relative to each other at a preset frequency so that the color conversion plate 25 sequentially switches the first zone 100, the second zone 200 and the third zone 300.

[0100] In the first region 100, the transparent region 253 is used to allow the first color light of the first light-emitting element 221 to pass through, and the first color conversion region 251 is used to convert the light of the third light-emitting element 223 into the first color light and allow it to pass through;

[0101] In the second region 200, the transparent region 253 is used to allow the second color light of the second light-emitting element 222 to pass through, and the second color conversion region 252 is used to convert the light of the third light-emitting element 223 into the second color light and allow it to pass through;

[0102] In the third region 300, the transparent region 253 is used to allow the third color light of the third light-emitting element 223 to pass through.

[0103] The display panel 21 includes multiple arrayed sub-pixel units 210. Each sub-pixel unit 210 controls its own opening state and degree of opening according to the received image data signal to display the brightness of the corresponding image data signal, thereby realizing image display. For example, to display 0 grayscale, the sub-pixel unit 210 controls itself to be in the closed state according to the data signal corresponding to 0 grayscale, so that light cannot pass through and there is no light on the light-emitting side, thus displaying 0 grayscale (i.e., black state); to display 64 grayscale, the sub-pixel unit 210 controls itself to open to the corresponding degree according to the data signal corresponding to 64 grayscale, so that the corresponding amount of light passes through, thus displaying the brightness of 64 grayscale on the light-emitting side.

[0104] Specifically, the structure and function of the display panel 21 in this embodiment are the same as described above. Figure 2The display panel 21 in the above text has the same or similar structure and function, and can achieve the same technical effect, as detailed above. The driving substrate 212 includes multiple pixel electrodes arranged in a sub-pixel array. The substrate 215 includes a full-surface common electrode. A pixel-level electric field is formed between the pixel electrodes and a portion of the common electrode opposite the pixel electrodes. This electric field drives a portion of the display functional layer located within the electric field to open to a corresponding degree, thereby displaying the brightness of the corresponding data signal. It can be understood that the pixel electrodes, the portion of the common electrode opposite the pixel electrodes, and the portion of the display functional layer located within the electric field formed by them constitute a sub-pixel unit 210. Specifically, the display functional layer can be a liquid crystal layer 213, an electronic ink layer, or other dimming layers that can be controlled by an electric or magnetic field, and the specific selection can be made according to the actual display requirements and application scenario requirements.

[0105] The backlight module 24 includes a color conversion plate 25, a lamp board 22, and a driver 26. The color conversion plate 25 is disposed on the light-incident side of the display panel 21 and includes a first color conversion area 251, a second color conversion area 252, and a transparent area 253. The color conversion plate 25 is used to convert or adjust the color of the light before it enters the display panel 21. Specifically, the first color conversion area 251 can receive a third color light and emit a first color light; the second color conversion area 252 can receive a third color light and emit a second color light.

[0106] The lamp panel 22 is located on the side of the color conversion plate 25 away from the display panel 21, and includes a first light-emitting element 221, a second light-emitting element 222, and a third light-emitting element 223 that emit different colors. The structure and function of the lamp panel 22 are as described above. Figure 2 The lamp panel 22 in the embodiment has the same structure and function, and can achieve the same technical effect, as can be seen in the above description.

[0107] The driving component 26 is connected to the color conversion plate 25 and / or the lamp plate 22, and is used to drive the lamp plate 22 and the color conversion plate 25 to rotate relative to each other at a preset frequency, so that the color conversion plate 25 sequentially switches between the first zone 100, the second zone 200 and the third zone 300 to achieve high-efficiency light color switching. In one embodiment, the driving component 26 is connected to the color conversion plate 25 to drive the color conversion plate 25 to rotate, thereby achieving relative rotation between the color conversion plate 25 and the lamp plate 22. In another embodiment, the driving component 26 is connected to the lamp plate 22 to drive the lamp plate 22 to rotate, thereby achieving relative rotation between the color conversion plate 25 and the lamp plate 22. In yet another embodiment, the driving component 26 connects the color conversion plate 25 and the lamp plate 22, and drives the color conversion plate 25 and the lamp plate 22 to rotate at different speeds, thereby achieving relative rotation between the color conversion plate 25 and the lamp plate 22. Further, the frequency of relative rotation of the color conversion plate 25 can be adjusted by adjusting the speed of the driving component 26, so that the frequency of relative rotation is a preset frequency.

[0108] Specifically, the driving component 26 may include a stepper motor (or servo motor, piezoelectric driver) and a rotating shaft. One end of the rotating shaft is connected to the stepper motor (or servo motor, piezoelectric driver), and the other end is fixedly connected to the color conversion plate 25 or the lamp plate 22, so that the color conversion plate 25 or the lamp plate 22 rotates synchronously with the rotating shaft. Specifically, the driving component 26 may also include a gear set, which drives the lamp plate 22 and the color conversion plate 25 to rotate at different speeds, thereby realizing the relative rotation between the lamp plate 22 and the color conversion plate 25. Specifically, the preset frequency can be set to 10Hz to 1000Hz. The preset frequency here can be defined as the number of rotations of the color conversion plate 25 relative to the lamp plate 22 per unit time. It should be noted that when the color conversion plate 25 rotates one revolution relative to the lamp plate 22, the lamp plate 22 will synchronously switch the first light source mode, the second light source mode, and the third light source mode once in sequence. This does not conflict with the definition of the preset frequency involved in the above embodiment, but is defined from a different perspective.

[0109] The color conversion plate 25 switches between different zones as it rotates relative to the lamp panel 22. The control circuit 23 is responsible for synchronously controlling the light emission state of the lamp panel 22, so that the backlight module 24 provides the display panel 21 with the first color light, the second color light, and the third color light in a time-division manner. Specifically, driven by the driver 26, the color conversion plate 25 sequentially switches between the first zone 100, the second zone 200, and the third zone 300 at a preset frequency.

[0110] like Figure 5 As shown, in the first region 100, the first light emitted by the first light-emitting element 221 is emitted into the transparent region 253 and passes through, while the light emitted by the third light-emitting element 223 is emitted into the first color conversion region 251 and converted into the first color light, which then passes through the first color conversion region 251 and is emitted. In this state, the first light-emitting element 221 and the third light-emitting element 223 emit light simultaneously, and after being processed by the transparent region 253 and the first color conversion region 251, the first color light is emitted, that is, the backlight module 24 provides the first color light to the display panel 21.

[0111] like Figure 6 As shown, in the second region 200, the second light emitted by the second light-emitting element 222 is emitted into the transparent region 253 and passes through, while the light emitted by the third light-emitting element 223 is emitted into the second color conversion region 252 and converted into second color light, which is then emitted through the first color conversion region 251. In this state, the second light-emitting element 222 and the third light-emitting element 223 emit light simultaneously, and after being processed by the transparent region 253 and the second color conversion region 252, the second color light is emitted, that is, the backlight module 24 provides the second color light to the display panel 21.

[0112] like Figure 7As shown, in the third region 300, the third color light of the third light-emitting element 223 is emitted through and transmitted to the transparent region 253. In this state, the third light-emitting element 223 emits light, and after being processed by the transparent region 253, it emits the third color light, that is, the backlight module 24 provides the third color light to the display panel 21.

[0113] In this embodiment, by dynamically switching the positions of the color conversion zone and the transparent zone 253, the light energy of different light-emitting elements is utilized efficiently, avoiding the energy loss caused by the absorption of monochromatic light by the filter in the traditional backlight module 24. Furthermore, the first color conversion zone 251 and the second color conversion zone 252 convert the light from the third light-emitting element 223 into the desired color, reducing dependence on an independent light source and lowering overall power consumption. The transparent zone 253 directly transmits the corresponding color light, maintaining brightness, and the rotation switching mechanism allows the three primary colors to be distributed as needed, improving display brightness and color performance. The periodic driving of the driving component 26 keeps the color conversion plate 25 in continuous motion, preventing localized light decay and extending the lifespan of the backlight module 24.

[0114] like Figure 4 As shown, in a specific embodiment, the display device 20 further includes a first Fresnel lens 217 and a second Fresnel lens 218, which are respectively disposed on the light-incident side and the light-exit side of the display panel 21 to further improve the brightness uniformity and image clarity of the display device 20.

[0115] In one specific embodiment, the driving element 26 is electrically connected to the control circuit 23, so that the control circuit 23 controls the driving element 26 to drive the lamp panel 22 and / or color conversion panel 25 to rotate relative to each other at a preset frequency; the control circuit 23 is also used to control the lamp panel 22 to sequentially switch between a first light source mode, a second light source mode, and a third light source mode at a preset frequency; wherein:

[0116] In the first light source mode, the color conversion plate 25 is located in the first zone 100, and the control circuit 23 is used to control the first light-emitting element 221 and the third light-emitting element 223 to emit light, so that the backlight module 24 provides the first color light to the display panel 21.

[0117] In the second light source mode, the color conversion plate 25 is located in the second zone 200, and the control circuit 23 is used to control the second light-emitting element 222 and the third light-emitting element 223 to emit light so that the backlight module 24 provides the second color light to the display panel 21.

[0118] In the third specific embodiment, in the third light source mode, the color conversion plate 25 is located in the third zone 300, and the control circuit 23 is used to control the third light-emitting element 223 to emit light so that the backlight module 24 provides the third color light to the display panel 21.

[0119] The control circuit 23 sends signals to the driving component 26 to drive the lamp panel 22 or the color conversion plate 25 to rotate periodically. The control circuit 23 may include a microprocessor and a driving module, capable of generating a synchronization signal according to a preset frequency to synchronously control the lamp panel 22 to emit light. The lamp panel 22 has multiple light-emitting elements, such as a first light-emitting element 221 being a red LED, a second light-emitting element 222 being a green LED, and a third light-emitting element 223 being a blue LED. The color conversion plate 25 is made of materials with different spectral characteristics; for example, the first region 100 is a red conversion layer, the second region 200 is a green conversion layer, and the third region 300 is a transparent layer. During operation, the control circuit 23 uses timing control to switch the lamp panel 22 between different light source modes, while simultaneously controlling the driving component 26 to rotate the color conversion plate 25 to the corresponding region. In specific applications, gear transmission or a magnetic levitation structure can be used to achieve smooth relative rotation between the lamp panel 22 and the color conversion plate 25. Alternatively, a software algorithm can be used to optimize the preset frequency to match the persistence of vision in the human eye.

[0120] like Figure 5 As shown, in the first light source mode, the color conversion plate 25 is located in the first area 100. The transparent area 253 covers the first light-emitting element 221 in a direction perpendicular to the lamp panel 22, and the first color conversion area 251 covers the third light-emitting element 223 in a direction perpendicular to the lamp panel 22. The control circuit 23 controls the first light-emitting element 221 and the third light-emitting element 223 to be in a light-emitting state, and controls the second light-emitting element 222 to be in a dark state. The first light-emitting element 221 emits a first color light to the transparent area 253 and passes through the transparent area 253, while the third light-emitting element 223 emits a third color light to the first color conversion area 251. The first color conversion area 251 receives the third color light and emits the first color light. This arrangement allows the backlight module 24 to provide the first color light to the display panel 21 in this mode.

[0121] like Figure 6 As shown, in the second light source mode, the color conversion plate 25 is located in the second area 200. The transparent area 253 covers the second light-emitting element 222 in a direction perpendicular to the lamp panel 22, and the second color conversion area 252 covers the third light-emitting element 223 in a direction perpendicular to the lamp panel 22. The control circuit 23 controls the second and third light-emitting elements 222 to be in an emitting state, and controls the first light-emitting element 221 to be in an off state. The second light-emitting element 222 emits second-color light to and through the transparent area 253, and the third light-emitting element 223 emits third-color light to the second color conversion area 252. The second color conversion area 252 receives the third-color light and emits second-color light. This arrangement allows the backlight module 24 to provide second-color light to the display panel 21 in this mode.

[0122] like Figure 7As shown, in the third light source mode, the color conversion plate 25 is located in the third zone 300. The transparent zone 253 covers the third light-emitting element 223 in a direction perpendicular to the lamp panel 22. The control circuit 23 controls the third light-emitting element 223 to be in a light-emitting state, and controls the first light-emitting element 221 and the second light-emitting element 222 to be in a extinguished state. The third light-emitting element 223 emits third-color light to the transparent zone 253 and passes through the transparent zone 253. This arrangement allows the backlight module 24 to provide third-color light to the display panel 21 in this mode.

[0123] By synchronously controlling the switching of the drive unit 26 and the light source mode, a smooth transition between different colors of light can be achieved in the backlight module 24, enhancing the dynamic performance of the displayed colors. The segmented structure of the color conversion plate 25, combined with the corresponding light-emitting elements, can effectively improve light conversion efficiency and reduce energy loss. The preset frequency setting ensures the synchronization of mechanical movement and light source switching, avoiding flickering or color mixing in the display screen. The combination design of color conversion plates 25 in different locations with specific light-emitting elements can precisely control the wavelength and color gamut of the output color light, thereby improving the color accuracy and visual comfort of the display device 20.

[0124] In one specific embodiment, the control circuit 23 is further configured to receive image information and process the image information to generate first image data information corresponding to the first color light, second image data information corresponding to the second color light, and third image data information corresponding to the third color light.

[0125] The display panel 21 is used to receive first image data information, second image data information and third image data information, and sequentially refresh and display the first image, second image and third image at a preset refresh rate; the preset refresh rate is 3n times the preset frequency, where n is a positive integer.

[0126] The control circuit 23 is used to receive the screen information to be displayed and to perform synchronous splitting processing on the screen information, splitting the image information to generate first image data information corresponding to the first color light, second image data information corresponding to the second color light, and third image data information corresponding to the third color light.

[0127] Synchronously, after the control circuit 23 transmits the synchronization timing control signal and the first image data information, the second image data information and the third image data information to the display panel 21, the display panel 21 generates a corresponding scanning signal according to the synchronization timing control signal to drive each sub-pixel to open sequentially. By writing the first image data information, the second image data information and the third image data information sequentially into each sub-pixel unit 210, the opening degree of each sub-pixel unit 210 is controlled. Taking the display panel 21 as a liquid crystal display panel 21 as an example, the liquid crystal in each sub-pixel unit 210 is driven to deflect at a corresponding angle according to the opening degree of each sub-pixel unit 210 to control the amount of light transmitted, thereby displaying the corresponding grayscale brightness.

[0128] The synchronous timing control signal enables the driver 26, lamp board 22, and display panel 21 to work synchronously, sequentially refreshing and displaying the first, second, and third images at a preset refresh rate for time-sequential color mixing display. Similar to the previous embodiment, the preset refresh rate is 3n times the preset frequency, where n is a positive integer, ensuring that the display panel 21 can complete the refresh of the full color image, avoiding screen flickering and abnormal color display.

[0129] Please see Figure 8 , Figure 8 This is a longitudinal cross-sectional structural schematic diagram of the color conversion plate provided in the first embodiment of this application. In this embodiment, the color conversion plate 25 includes a first color conversion layer and a second color conversion layer of different colors; the first color conversion layer is disposed in the first color conversion region 251 for absorbing a third color light and emitting a first color light; the material of the first color conversion layer includes a fluorescent material or a quantum dot material of the first color; the second color conversion layer is disposed in the second color conversion region 252 for absorbing a third color light and emitting a second color light; the material of the second color conversion layer includes a fluorescent material or a quantum dot material of the second color.

[0130] The color conversion plate 25 achieves spectral adjustment by partitioning conversion layers of different colors. The first color conversion layer can be made of red quantum dot material or red fluorescent material, and the second color conversion layer can be made of green fluorescent material or green quantum dot material. When a third color light (such as blue light) irradiates the first color conversion layer, the first color conversion layer absorbs the third color light and is stimulated to emit the first color light (such as red light); when the third color light (such as blue light) irradiates the second color conversion layer, the second color light is converted to absorb the third color light and is stimulated to emit the second color light (such as green light). In the specific manufacturing process, nanocrystalline quantum dot materials can be used to make the first color conversion layer and / or the second color conversion layer, or organic small molecule fluorescent materials can be used as the first color conversion layer and / or the second color conversion layer. Different color combinations can achieve flexible configuration of the three primary colors of red, green and blue. For example, the first color conversion layer can be set as a red quantum dot layer and the second color conversion layer as a green fluorescent layer, or the first color conversion layer can be set as a green quantum dot layer and the second color conversion layer as a red fluorescent layer.

[0131] By using color conversion layers in different zones, precise control of the backlight spectrum can be achieved. The first and second color conversion layers work together to effectively improve the color gamut coverage of the display device 20. The use of quantum dot materials enables a narrower emission half-width, improving color purity, while fluorescent materials offer higher conversion efficiency. The flexible configuration of different color combinations allows the display device 20 to adapt to various display needs; for example, fluorescent materials can be used in scenarios requiring high brightness, while quantum dot materials can be used in scenarios requiring high color performance, thus balancing display quality and energy efficiency.

[0132] Please see Figure 9 , Figure 9 This is a longitudinal cross-sectional structural diagram of a color conversion plate provided in the second embodiment of this application. Further, in this embodiment, the color conversion plate 25 also includes a first filter layer 254 and a second filter layer 255; the first filter layer 254 is stacked on the side of the first color conversion layer away from the lamp panel 22, and is used to filter out the first color light; the second filter layer 255 is stacked on the side of the second color conversion layer away from the lamp panel 22, and is used to filter out the second color light.

[0133] The first filter layer 254 and the first color conversion layer form a composite structure, which selectively transmits light of a specific wavelength to filter the first color light. Bandpass filters or absorptive filters can be used as materials, such as a multilayer dielectric film system deposited on a glass substrate, or an organic dye layer coated on a plastic substrate. The second filter layer 255 has similar structural features to the first filter layer 254, but its transmission wavelength range matches the second color light band. During fabrication, a corresponding photoresist can be coated on the surface of the color conversion substrate 250, followed by exposure and development to form a filter layer with a microlens structure. A fluorescent layer is then fabricated on the surface of the filter layer. The area of ​​the color conversion substrate 250 corresponding to the transparent region 253 can be leveled using transparent organic or inorganic materials to form a transparent planarization layer, making the surface of the color conversion plate 25 flat and improving its light modulation effect.

[0134] By setting up independent filter layers, stray light interference generated during color conversion can be effectively eliminated, improving the purity and saturation of displayed colors. Firstly, the precise selection of specific wavelengths by the filter layer reduces light leakage from the color conversion material. Secondly, the filter layer blocks reverse interference from external light on the color conversion layer. This dual-layer filter structure can improve color conversion efficiency by 15%-20%, while reducing color aliasing caused by spectral overlap. The layered design of the filter layer and color conversion layer also improves the light propagation path, making the brightness distribution of the emitted light more uniform, thereby improving the overall visual effect and energy efficiency of the display device 20.

[0135] Please see Figure 10 , Figure 10 This is a schematic diagram of the planar structure of the color conversion plate provided in the third embodiment of this application. In this embodiment, the color conversion plate 25 is circular, and the first color conversion area 251, the second color conversion area 252, and the transparent area 253 are fan-shaped with equal central angles; a light-shielding area 256 is provided between the first color conversion area 251 and the second color conversion area 252, between the second color conversion area 252 and the transparent area 253, and between the transparent area 253 and the first color conversion area 251. The light-shielding area 256 is fan-shaped, and the central angle of the light-shielding area 256 ranges from 1° to 15°.

[0136] The color conversion plate 25 adopts a circular structure to facilitate the uniform distribution of multiple areas. The first color conversion area 251, the second color conversion area 252, and the transparent area 253 are designed with equal central angles in a fan shape to ensure that each area is symmetrically arranged in the circumferential direction. For example, when the central angle of each area is 120°, a three-part structure can be formed. The light-shielding area 256, as a dividing structure, also adopts a fan shape design, with its central angle controlled between 1° and 15°. This can be achieved by adjusting the width of the light-shielding area 256. For example, using a 10° light-shielding area 256 can balance the light isolation effect and the light transmission area. Specifically, a light-shielding material can be coated on the surface of the color conversion plate 25 to form a dividing strip; alternatively, a thin film material with local light-shielding properties can be used to achieve a composite structure of the light-shielding area 256 and the color conversion area through a lamination process. Alternatively, a light-shielding layer can be formed by stacking adjacent filter layers, which simplifies the manufacturing process.

[0137] By setting a fan-shaped area with equal central angles, the optical characteristics of the color conversion plate 25 are uniformly distributed in the circumferential direction, improving the color consistency of the display device 20. The fan-shaped design of the light-shielding area 256 effectively blocks light interference between different color conversion areas, reducing color mixing. Simultaneously, the central angle range of the light-shielding area 256 is 1° to 15°, ensuring light-shielding effectiveness while avoiding excessive light-shielding area that could lead to a decrease in overall light transmittance. This structural design improves the contrast and color purity of the display device 20. Furthermore, by precisely controlling the size of the light-shielding area 256, an optimal balance can be achieved between optical performance and brightness output, enhancing overall display quality.

[0138] Please see Figure 11 , Figure 11 This is a schematic diagram of the structure of a backlight module provided in an embodiment of this application. In this embodiment, the backlight module 24 further includes a light shield 27, which includes a connected side wall and a top wall; the side wall surrounds the color conversion plate 25, the first light-emitting element 221, the second light-emitting element 222, and the third light-emitting element 223; the top wall extends to the side of the color conversion plate 25 away from the lamp plate 22, and the orthographic projection of the top wall on the color conversion plate 25 falls on the color conversion plate 25; wherein, a reflective layer 271 is provided on the side of the light shield 27 near the lamp plate 22 and the color conversion plate 25.

[0139] Specifically, the light shield 27 can be fixed to the substrate of the lamp plate 22. In the direction perpendicular to the lamp plate 22, the light shield 27 is generally ring-shaped and surrounds the color conversion plate 25; at the same time, the orthographic projection of the light shield 27 on the color conversion plate 25 falls partly on the color conversion plate 25 and partly on the lamp plate 22 along the radial direction of the color conversion plate 25; the projection on the lamp plate 22 is also ring-shaped, and the ring surrounds the light-emitting element on the lamp plate 22.

[0140] Specifically, the light shield 27 includes a bottom wall, side walls, and a top wall connected together. The bottom wall is fixed to the substrate of the lamp plate 22. The side walls surround the color conversion plate 25 and enclose the light-emitting element. The top wall bends and extends to the side of the color conversion plate 25 away from the lamp plate 22, and the orthographic projection of the top wall falls on the color conversion plate 25. Through the above-described arrangement of the light shield 27, the light shield 27 can block light incident on the outside of the color conversion plate 25, thereby preventing light leakage and ensuring that all light is emitted from the color conversion plate 25, thus ensuring the purity of the emitted light. Furthermore, by providing a reflective layer 271 on the side of the light shield 27 near the lamp plate 22 and the color conversion plate 25, i.e., providing a reflective layer 271 on the inner surface of the light shield 27, light incident on the outside of the color conversion plate 25 can be reflected back. The reflected light can then be emitted again through the color conversion plate 25, further improving light utilization, reducing light loss, and lowering power consumption. Specifically, the light shield 27 can be made of metal, organic polymer or composite materials, and can be formed into an integral structure by stamping, injection molding or assembly.

[0141] It is easy to understand that the light shield 27 needs to leave a certain gap between itself and the color conversion plate 25 in order to avoid friction and collision between the light shield 27 and the color conversion plate 25 when the color conversion plate 25 and the lamp plate 22 rotate relative to each other, which would cause structural damage and affect the preset frequency, resulting in the problem of display abnormality caused by the asynchronous switching of the light source mode and the refresh rate of the display panel 21.

[0142] Please see Figure 12 , Figure 12 This is a schematic diagram of the backlight module provided in another embodiment of this application. In this embodiment, the backlight module 24 further includes an airflow guide 28, which is disposed on the side of the color conversion plate 25 near the lamp plate 22 and located at the center of the color conversion plate 25. It is used to generate a heat dissipation airflow when the color conversion plate 25 and the lamp plate 22 rotate relative to each other. The heat dissipation airflow flows from the airflow guide 28 to the lamp plate 22 to dissipate heat from the lamp plate 22.

[0143] Specifically, the airflow guide 28 can be made of metal materials, such as aluminum alloy or copper alloy, or engineering plastics with good thermal conductivity. The airflow guide 28 can be designed as a spiral structure, a blade structure, or a honeycomb structure. The blade structure can be specifically designed as an inclined blade or a streamlined blade structure, which forms an airflow channel through rotational motion.

[0144] When the color conversion plate 25 and the lamp panel 22 rotate relative to each other, the special structure of the airflow guide 28 guides the surrounding air to form a directional flow, causing hot air to diffuse from the central area to the edge and finally flow to the surface of the lamp panel 22. In specific implementations, the airflow guide 28 can be manufactured using injection molding or machined into a specific shape. Heat dissipation fins can also be provided on the surface of the airflow guide 28 to further enhance the heat dissipation effect.

[0145] Specifically, in one embodiment, the airflow guide 28 can be made of a transparent material to avoid the airflow guide 28 blocking light and affecting the light transmittance. In another embodiment, in the direction perpendicular to the color conversion plate 25, the orthogonal projection of the airflow guide 28 on the color conversion plate 25 can also fall on the light-shielding area 256. This can be understood as setting the airflow guide 28 at the light-shielding area 256 to further reduce the impact of the airflow guide 28 on the light transmittance; moreover, such an arrangement can also make the size of the airflow guide 28 as large as possible, thereby further improving the heat dissipation effect on the lamp panel 22.

[0146] Please see Figure 13 , Figure 13 This is a flowchart illustrating a driving method for a display device according to another embodiment of this application. In this embodiment, a driving method for a display device 20 is provided, for driving the display device 20, including:

[0147] S10: Control the drive unit 26 to drive the lamp board 22 and the color conversion plate 25 to rotate relative to each other at a preset frequency, so that the color conversion plate 25 sequentially switches the first zone 100, the second zone 200 and the third zone 300.

[0148] S20: Based on the location signal, control the lamp panel 22 to sequentially switch between the first light source mode, the second light source mode, and the third light source mode at a preset frequency;

[0149] S30: Receive image information, process the image information, and generate first image data information corresponding to the first color light, second image data information corresponding to the second color light, and third image data information corresponding to the third color light;

[0150] S40: Drive the display panel 21 according to the first image data information, the second image data information and the third image data information, so that the display panel 21 sequentially refreshes and displays the first image, the second image and the third image at a preset refresh rate; wherein, the preset refresh rate is 3n times the preset frequency, and n is a positive integer.

[0151] In step S10, in the first region 100, the transparent region 253 is used to allow the first color light of the first light-emitting element 221 to pass through, and the first color conversion region 251 is used to convert the light of the third light-emitting element 223 into the first color light and allow it to pass through; in the second region 200, the transparent region 253 is used to allow the second color light of the second light-emitting element 222 to pass through, and the second color conversion region 252 is used to convert the light of the third light-emitting element 223 into the second color light and allow it to pass through; in the third region 300, the transparent region 253 is used to allow the third color light of the third light-emitting element 223 to pass through.

[0152] In step S20, in the first light source mode, the color conversion plate 25 is located in the first area 100, controlling the first light-emitting element 221 and the third light-emitting element 223 to emit light, so that the backlight module 24 provides the first color light; in the second light source mode, the color conversion plate 25 is located in the second area 200, controlling the second light-emitting element 222 and the third light-emitting element 223 to emit light, so that the backlight module 24 provides the second color light; in the third light source mode, the color conversion plate 25 is located in the third area 300, controlling the third light-emitting element 223 to emit light, so that the backlight module 24 provides the third color light.

[0153] The driving method provided in this embodiment can be used to drive the display device 20 provided in the above embodiments to display images. This driving method can be executed by the control circuit 23 in the display device 20. The structure and function of the display device 20 can be referred to the relevant description above, and will not be repeated here.

[0154] The color conversion plate 25 achieves optical function switching between different areas through rotation. The transparent area 253 allows light of a specific wavelength to pass through directly, while the color conversion area converts the light from the third light-emitting element 223 into either a first or second color light through material properties. The driving component 26 can use a stepper motor or a servo motor to achieve precise rotation control, with a preset frequency typically in the Hz range. Light source mode switching is achieved by controlling the start and stop of different light-emitting elements. For example, in the first light source mode, the first light-emitting element 221 and the third light-emitting element 223 work simultaneously; in the second light source mode, the second light-emitting element 222 and the third light-emitting element 223 work collaboratively; and in the third light source mode, only the third light-emitting element 223 works.

[0155] In step S30, the module with screen information splitting processing can use a Field-Programmable Gate Array (FPGA) integrated circuit module or a Graphics Processing Unit (GPU) to implement time-division multiplexing of data, and the refresh rate of the display panel 21 is kept synchronized with the light source mode switching frequency. In a specific embodiment, the position of the color conversion plate 25 can be detected by a photoelectric sensor, or the rotation angle can be precisely controlled by a motor driver.

[0156] By synchronously controlling the rotation of the color conversion plate 25 and the switching of the light source mode, the backlight module 24 achieves specific spectral output in different areas, effectively improving color conversion efficiency and reducing power consumption. The preset frequency and refresh rate are 3n times each, ensuring that the display panel 21 completes a full screen refresh in each light source mode, eliminating screen flicker. Time-division display of image data information of different colors can improve color performance, while the reuse of the third light-emitting element 223 in multiple modes reduces hardware complexity. The setting of the color conversion zone reduces the light loss of traditional three primary colors emitting light independently, improves the overall light utilization efficiency, and, together with the mechanical rotation structure, achieves dynamic optical adjustment, providing the display device 20 with a higher dynamic range and a wider color gamut coverage.

[0157] Please see Figure 14 , Figure 14 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application. In this embodiment, a projection device 10 is provided, including:

[0158] Casing 30;

[0159] The display device 20 is disposed within the housing 30;

[0160] The lens assembly 40 includes at least one lens, which is disposed on the housing 30 and located in the light path of the emitted light from the display device 20, and is used to adjust the magnification and clarity of the image.

[0161] In this embodiment, the display device 20 includes a display panel 21, a backlight module 24, and a control circuit 23. The specific structure and function of the display panel 21, the backlight module 24, and the control circuit 23 are the same as or similar to the structure and function of the display panel 21, the backlight module 24, and the control circuit 23 involved in the above embodiment, and can achieve the same technical effect. For details, please refer to the relevant description above.

[0162] The housing 30, serving as the overall structural frame, can be made of metal or plastic. The projection device 10 also includes a lens assembly 40 mounted on the housing 30. This lens assembly 40 is located in the optical path of the emitted light from the display device 20 and includes at least one lens and a zoom control board. The zoom control board enables the lens to zoom and focus, thereby adjusting the magnification and sharpness of the image.

[0163] The lens assembly 40 achieves imaging functionality through optical design, and can employ a single convex lens or a compound lens system composed of multiple lenses. In practical applications, the lens assembly 40 can be positioned by sliding, rotating, or threaded adjustment. For example, a rotatable lens group can be mounted on the top of the housing 30, or a sliding guide rail can be configured on the side wall to adjust the focal length. Lenses can be made of glass or resin materials, and light transmittance can be improved through coating treatment. When it is necessary to adjust the magnification of the image, this can be achieved by changing the distance between the lens groups, while sharpness adjustment is accomplished by precisely controlling the lens position or using an autofocus structure.

[0164] By integrating the display device 20 and the adjustable lens assembly 40 within the housing 30, flexible control of the screen size can be achieved to meet the projection needs of different scenarios. The lens assembly 40's precise control of the light path effectively improves image clarity, resulting in more delicate image details. The overall structural design reduces the device's size while ensuring the stability of the optical system, allowing the device to maintain good imaging performance even during movement. The adjustable lens structure provides users with a more intuitive operation method, allowing parameter adjustments to be made without replacing optical components, thus improving ease of use.

[0165] The projection device 10 also includes a reflector 11, which is disposed in the optical path between the display device 20 and the lens assembly 40. The reflector 11 reflects and converges the emitted light from the display device 20 onto the desired optical path direction to improve light efficiency and enhance the uniformity of the light spot illuminating the imaging component, resulting in a more uniform overall image brightness. Furthermore, by using the reflector 11 to change the direction of the optical path and fold the optical path, a longer actual optical path length can be achieved within a relatively compact device structure, which is beneficial for the device's lightweight and portable design.

[0166] Furthermore, the projection device 10 also includes a heat sink 50 and a fan 60 for heat dissipation of the display panel 21 and the backlight module 24. The projection device 10 also includes a battery module 70, a speaker 80, and an interactive button / voice control panel 90, which power the device via the battery module 70, enable synchronized image and sound output via the speaker 80 to expand the usage scenarios, and enable human-computer interaction via the interactive button / voice control panel 90.

[0167] The above are merely embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A display device, comprising: The display panel includes multiple sub-pixel units arranged in an array, each of which is used to turn on or off according to a corresponding driving signal; A backlight module includes a lamp board and a color conversion board; the color conversion board is disposed on the light-incident side of the display panel, and the lamp board is disposed on the side of the color conversion board away from the display panel; A control circuit is used to control the light panel to emit light and to provide image data signals to the display panel. The lamp panel is characterized in that it includes a first light-emitting element, a second light-emitting element, and a third light-emitting element that emit different colors; the color conversion panel includes a first color conversion area, a second color conversion area, and a transparent area. The backlight module also includes a driving component connected to the color conversion plate and / or the lamp plate, used to drive the lamp plate and the color conversion plate to rotate relative to each other at a preset frequency, so that the color conversion plate sequentially switches between the first zone, the second zone and the third zone. In the first region, the transparent region is used to allow the first color light of the first light-emitting element to pass through, and the first color conversion region is used to convert the light of the third light-emitting element into the first color light and allow it to pass through; In the second region, the transparent region is used to allow the second color light of the second light-emitting element to pass through, and the second color conversion region is used to convert the light of the third light-emitting element into the second color light and allow it to pass through; In the third region, the transparent region is used to allow the third color light of the third light-emitting element to pass through.

2. The display device according to claim 1, characterized in that, The driving component is electrically connected to the control circuit, so that the control circuit controls the driving component to drive the lamp panel and / or the color conversion panel to rotate relative to each other at the preset frequency; The control circuit is also used to control the lamp panel to sequentially switch between the first light source mode, the second light source mode, and the third light source mode at the preset frequency; wherein... In the first light source mode, the color conversion plate is located in the first area, and the control circuit is used to control the first light-emitting element and the third light-emitting element to emit light, so that the backlight module provides the first color light to the display panel; In the second light source mode, the color conversion plate is located in the second area, and the control circuit is used to control the second light-emitting element and the third light-emitting element to emit light, so that the backlight module provides the second color light to the display panel; In the third light source mode, the color conversion plate is located in the third area, and the control circuit is used to control the third light-emitting element to emit light so that the backlight module provides the third color light to the display panel.

3. The display device according to claim 2, characterized in that, The control circuit is also used to receive image information and process the image information to generate first image data information corresponding to the first color light, second image data information corresponding to the second color light, and third image data information corresponding to the third color light. The display panel is used to receive the first image data information, the second image data information, and the third image data information, and sequentially refresh and display the first image, the second image, and the third image at a preset refresh rate; the preset refresh rate is 3n times the preset frequency, where n is a positive integer.

4. The display device according to claim 1, characterized in that, The color conversion panel includes a first color conversion layer and a second color conversion layer with different colors; The first color conversion layer is disposed in the first color conversion region and is used to absorb the third color light and emit the first color light; the material of the first color conversion layer includes a fluorescent material of the first color or a quantum dot material. The second color conversion layer is disposed in the second color conversion region and is used to absorb the third color light and emit the second color light; the material of the second color conversion layer includes a fluorescent material or a quantum dot material of the second color.

5. The display device according to claim 4, characterized in that, The color conversion panel further includes a first filter layer and a second filter layer; the first filter layer is stacked on the side of the first color conversion layer away from the lamp panel, and is used to filter out the first color light; the second filter layer is stacked on the side of the second color conversion layer away from the lamp panel, and is used to filter out the second color light.

6. The display device according to claim 1, characterized in that, The color conversion plate is circular, and the first color conversion area, the second color conversion area, and the transparent area are sectors with equal central angles; A light-shielding area is provided between the first color conversion area and the second color conversion area, between the second color conversion area and the transparent area, and between the transparent area and the first color conversion area. The light-shielding area is fan-shaped, and the central angle of the light-shielding area ranges from 1° to 15°.

7. The display device according to claim 1, characterized in that, The backlight module further includes a light shield, which includes a connected side wall and a top wall; the side wall encloses the color conversion plate, the first light-emitting element, the second light-emitting element, and the third light-emitting element; the top wall extends to the side of the color conversion plate away from the lamp panel, and the orthographic projection of the top wall on the color conversion plate falls on the color conversion plate; wherein, a reflective layer is provided on the side of the light shield near the lamp panel and the color conversion plate.

8. The display device according to claim 1, characterized in that, The backlight module also includes an airflow guide, which is disposed on the side of the color conversion plate near the lamp plate and located at the center of the color conversion plate. It is used to generate a heat dissipation airflow when the color conversion plate and the lamp plate rotate relative to each other. The heat dissipation airflow flows from the airflow guide to the lamp plate to dissipate heat from the lamp plate.

9. A driving method for a display device, used to drive the display device as described in any one of claims 1-8, characterized in that, include: A control drive unit drives the lamp panel and color conversion plate to rotate relative to each other at a preset frequency, so that the color conversion plate sequentially switches between a first zone, a second zone, and a third zone. In the first zone, a transparent zone allows the first color light from the first light-emitting element to pass through, and a first color conversion zone converts the light from the third light-emitting element into the first color light and allows it to pass through. In the second zone, a transparent zone allows the second color light from the second light-emitting element to pass through, and a second color conversion zone converts the light from the third light-emitting element into the second color light and allows it to pass through. In the third zone, a transparent zone allows the third color light from the third light-emitting element to pass through. According to the location signal, the control panel sequentially switches between a first light source mode, a second light source mode, and a third light source mode at the preset frequency; wherein, in the first light source mode, the color conversion panel is located in the first location and controls the first light-emitting element and the third light-emitting element to emit light, so that the backlight module provides the first color light; in the second light source mode, the color conversion panel is located in the second location and controls the second light-emitting element and the third light-emitting element to emit light, so that the backlight module provides the second color light; in the third light source mode, the color conversion panel is located in the third location and controls the third light-emitting element to emit light, so that the backlight module provides the third color light; Receive image information and process the image information to generate first image data information corresponding to the first light source mode, second image data information corresponding to the second light source mode, and third image data information corresponding to the third light source mode; The display panel is driven according to the first image data information, the second image data information and the third image data information, so that the display panel sequentially refreshes and displays the first image, the second image and the third image at a preset refresh rate; wherein, the preset refresh rate is 3n times the preset frequency, and n is a positive integer.

10. A projection device, characterized in that, include: case; A display device is disposed within the housing, and the display device is the display device as described in any one of claims 1-8; A lens assembly, including at least one lens, is disposed on the housing and located in the optical path of the emitted light from the display device, for adjusting the magnification and sharpness of the image.

Images