Display device and display control method thereof

Abstract

The invention discloses a display device and a display control method thereof. The display device comprises a driving backboard, a plurality of light-emitting chips electrically connected with the driving backboard, and a light deflection layer on the light-emitting sides of the light-emitting chips. And for each frame of image, each light-emitting chip displays the first image and the second image in a time-sharing manner. The light deflection layer is configured to deflect the incident light of the first image by a set angle and then emit the incident light, and directly transmit the incident light of the second image. Under the condition that the number of the light-emitting chips is not increased, the light-emitting chips are matched with the light deflection layer, so that the pixel can be doubled, the resolution ratio of a display image is improved, the cost is effectively controlled, and the problem that the production yield is further reduced due to the fact that the number of the light-emitting chips is greatly increased is solved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device and a display control method thereof. Background Art

[0002] Light Emitting Diode (LED) display technology refers to the display technology that uses LED directly as the light-emitting unit. As the requirements for the resolution and display effect of display devices become higher and higher, LED display devices usually use Mini LED (Mini Light Emitting Diode, Mini LED for short) chips or Micro LED (Micro Light Emitting Diode, Micro LED for short) chips as the light-emitting unit.

[0003] Current Mini LED or Micro LED display devices can directly use Mini LED chips or Micro LED chips as pixels or sub-pixels, so Mini LED chips and Micro LED chips are usually smaller in size. As the resolution of display devices continues to increase, the size of light-emitting chips continues to decrease, and the number of light-emitting chips continues to increase. However, the display device needs to make the driving backplane and the light-emitting chip separately, and then use mass transfer technology to transfer the light-emitting chip to the driving backplane for assembly, which is accompanied by the problem of rising production costs and reduced production yield. Summary of the invention

[0004] According to a first aspect of an embodiment of the present invention, a display device is provided, including:

[0005] A driving backplane, used for providing a driving signal;

[0006] A plurality of light-emitting chips are located on the driving backplane; the plurality of light-emitting chips are electrically connected to the driving backplane; for each frame image, the plurality of light-emitting chips display a first image and a second image in a time-sharing manner, and the first image and the second image are combined into a current frame image; and

[0007] The light deflection layer is located at the light-emitting side of the plurality of light-emitting chips; the light deflection layer is configured to deflect the incident light of the first image at a set angle and then emit it, and directly transmit the incident light of the second image.

[0008] In some embodiments of the present invention, the present invention further includes:

[0009] a polarization conversion layer, located at the light-emitting side of the plurality of light-emitting chips, for converting the emitted light of the plurality of light-emitting chips into a first linearly polarized light; and

[0010] a phase delay layer, located on a side of the polarization conversion layer away from the plurality of light-emitting chips; the phase delay layer is configured to generate a first phase delay when the plurality of light-emitting chips display the first image, and to generate a second phase delay when the plurality of light-emitting chips display the second image; the first linear polarized light is still the first linear polarized light under the effect of the first phase delay, and the first linear polarized light is converted into the second linear polarized light under the effect of the second phase delay; the polarization directions of the first linear polarized light and the second linear polarized light are perpendicular to each other;

[0011] The light deflection layer is located on a side of the phase retardation layer away from the polarization conversion layer; the light deflection layer is configured to directly transmit the incident second linear polarized light and deflect the incident first linear polarized light at a set angle before emitting.

[0012] In some embodiments of the present invention, the polarization conversion layer includes a plurality of polarization conversion units; and the plurality of polarization conversion units correspond one-to-one to the plurality of light-emitting chips.

[0013] In some embodiments of the present invention, the polarization conversion unit is a metal wire grid covering the corresponding light emitting surface of the light emitting chip.

[0014] In some embodiments of the present invention, the phase retardation layer comprises:

[0015] a first substrate;

[0016] a second substrate, arranged opposite to the first substrate;

[0017] a liquid crystal layer, located between the first substrate and the second substrate;

[0018] A first electrode layer is located between the first substrate and the liquid crystal layer; and

[0019] a second electrode layer, located between the second substrate and the liquid crystal layer;

[0020] The first electrode layer and the second electrode layer are configured to be applied with a first signal and a second signal in a time-sharing manner; the first signal causes the liquid crystal layer to generate the first phase delay, and the second signal causes the liquid crystal layer to generate the second phase delay.

[0021] In some embodiments of the present invention, the first phase delay amount is 0, and the second phase delay amount is π.

[0022] In some embodiments of the present invention, the light deflection layer is a birefringent crystal layer; the birefringent crystal layer comprises a light incident surface and a light emitting surface which are parallel to each other, and the optical axis of the birefringent crystal layer forms a set angle with the light incident surface;

[0023] The incident direction of the light incident from the light incident surface of the birefringent crystal layer is not parallel to the optical axis.

[0024] In some embodiments of the present invention, the plurality of light emitting chips emit light of the same color; and the display device further comprises:

[0025] A color conversion layer is located on a side of the light deflection layer away from the plurality of light-emitting chips; the color conversion layer comprises a plurality of color conversion units and diffusion units arranged in an array;

[0026] Wherein, every two adjacent color conversion units form a color conversion unit group, and the two color conversion units in the color conversion unit group are a first color conversion unit and a second color conversion unit; one color conversion unit group is arranged corresponding to one light-emitting chip, and the orthographic projection of the first color conversion unit in the color conversion unit group on the driving backplane covers the position where the corresponding light-emitting chip is located, and the orthographic projection of the second color conversion unit on the driving backplane does not overlap with the position where the corresponding light-emitting chip is located;

[0027] Every two adjacent diffusion units form a diffusion unit group, and the two diffusion units in the diffusion unit group are a first diffusion unit and a second diffusion unit; one diffusion unit group is arranged corresponding to one light-emitting chip, and the orthographic projection of the first diffusion unit in the diffusion unit group covers the position where the corresponding light-emitting chip is located on the driving backplane, and the orthographic projection of the second diffusion unit on the driving backplane does not overlap with the position where the corresponding light-emitting chip is located;

[0028] The first linear polarized light emitted by each light-emitting chip through the light deflection layer is incident on the corresponding second color conversion unit and the second diffusion unit; the second linear polarized light emitted by each light-emitting chip through the light deflection layer is incident on the corresponding first color conversion unit and the first diffusion unit;

[0029] Wherein, the light-emitting chip is a blue light MiniLED chip or a blue light Micro LED chip;

[0030] The multiple color conversion units are divided into multiple red conversion units and multiple green conversion units; every two adjacent red conversion units form a red conversion unit group, and every two adjacent green conversion units form a green conversion unit group; each red conversion unit group, each green conversion unit group and each diffusion unit group are arranged in an array according to a set order.

[0031] A second aspect of an embodiment of the present invention provides a display control method based on any of the above display devices, comprising:

[0032] When displaying an image, for each frame of image, each light-emitting chip is driven in a time-sharing manner to display a first image and a second image; the first image and the second image are combined into a current frame of image;

[0033] When each light-emitting chip displays the first image, a first signal is applied to the phase delay layer to cause the phase delay layer to produce a first phase delay; when each light-emitting chip displays the second image, a second signal is applied to the phase delay layer to cause the phase delay layer to produce a second phase delay.

[0034] In some embodiments of the present invention, the frequency at which each light-emitting chip switches to display the first image and the second image is the same as the frequency at which the phase delay layer is switched to apply the first signal and the second signal, and the switching frequency is greater than a frequency recognizable by the human eye.

[0035] In the display device and display control method thereof provided by the embodiment of the present invention, the display device includes: a driving backplane, a plurality of light-emitting chips electrically connected to the driving backplane, and a light deflection layer on the light-emitting side of the light-emitting chip. For each frame of an image, each light-emitting chip displays a first image and a second image in a time-sharing manner. The light deflection layer is configured to deflect the incident light of the first image at a set angle and then emit it, and directly transmit the incident light of the second image. Without increasing the number of light-emitting chips, the light-emitting chips and the light deflection layer can double the pixel expansion, improve the resolution of the displayed image, effectively control the cost, and avoid the problem of further reduction in production yield due to a substantial increase in the number of light-emitting chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings introduced below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0037] Figure 1 One of the structural schematic diagrams of the display device provided by the embodiment of the present invention;

[0038] Figure 2 A second structural schematic diagram of a display device provided by an embodiment of the present invention;

[0039] Figure 3 A third structural schematic diagram of a display device provided in an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the planar structure of a polarization conversion unit provided in an embodiment of the present invention;

[0041] Figure 5A schematic diagram of the structure of a phase delay layer in one state provided by an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the structure of a phase retardation layer in another state provided by an embodiment of the present invention;

[0043] Figure 7 A schematic diagram of a birefringent crystal provided by an embodiment of the present invention;

[0044] Figure 8 A schematic diagram of the cross-sectional structure of a light-emitting chip provided in an embodiment of the present invention;

[0045] Fig. 9 A fourth structural schematic diagram of a display device provided in an embodiment of the present invention;

[0046] Fig.10 A schematic diagram of the planar structure of a color conversion layer provided by an embodiment of the present invention;

[0047] Fig.11 The present invention provides a flow chart of a display control method for a display device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described below with reference to the accompanying drawings and examples. However, the exemplary embodiments can be implemented in various forms and should not be understood as being limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concepts of the exemplary embodiments to those skilled in the art. The same figure marks in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing position and direction described in the present invention are all explained using the accompanying drawings as examples, but changes can be made as needed, and the changes made are all included in the scope of protection of the present invention. The drawings of the present invention are only used to illustrate the relative position relationship and do not represent the true proportions.

[0049] Light-emitting diode display technology refers to display technology that uses LEDs directly as light-emitting units. As the requirements for the resolution and display effects of display devices become higher and higher, Mini LED chips or Micro LED chips can be used as light-emitting units in LED display devices. Mini LED chips or Micro LED chips are miniaturized LED chips, and their size can reach the micron level. For example, the size of a Mini LED chip is less than 500μm, and the size of a Micro LED chip is less than 100μm. When the size of an LED chip is reduced to the pixel level, a Mini LED chip or Micro LED chip can be directly used as a light-emitting unit for image display.

[0050] Because Mini LED and Micro LED have the characteristics of low power consumption, long life, high stability, and self-luminescence without the need for a backlight, they have the advantages of energy saving and high integration. They can be applied to almost all mainstream display fields and are considered to be the ideal form of future display technology.

[0051] As the resolution of display devices continues to increase, the size of Mini LED chips and Micro LED chips continues to decrease, and the number of Mini LED chips and Micro LED chips continues to increase. However, the display device needs to separately manufacture the driving backplane and the Mini LED chips and Micro LED chips, and then use mass transfer technology to transfer the Mini LED chips and Micro LED chips to the driving backplane for assembly, which is accompanied by rising production costs and reduced production yields.

[0052] In view of this, an embodiment of the present invention provides a display device. Figure 1 This is one of the structural schematic diagrams of the display device provided by the embodiment of the present invention.

[0053] like Figure 1 As shown, the display device includes: a driving backplane 1 , a light emitting chip 2 and a light deflecting layer 5 .

[0054] The driving backplane 1 is located at the bottom of the display device. Usually, its size is adapted to the overall size of the display device, and the size of the driving backplane 1 is slightly smaller than the size of the display device.

[0055] The shape of the driving backplane 1 is the same as the overall shape of the display device, and can be set to a rectangular or square shape in general. When the display device is a special-shaped display device, the shape of the driving backplane can be adaptively set to other shapes, which is not limited here.

[0056] The driving backplane 1 can be manufactured using the currently mature thin film process, and the driving backplane 1 can be manufactured as an active driving backplane. Alternatively, the driving backplane 1 can also use a printed circuit board (PCB), for example, a high density interconnect (HDI) circuit board.

[0057] In some embodiments, the display device may also include multiple driving backplanes 1, which are spliced ​​to provide driving signals for the display device. In order to avoid optical problems caused by splicing driving backplanes 1, the seams between adjacent driving backplanes 1 are minimized, or even seamless splicing is achieved.

[0058] The driving backplane 1 is used to provide a driving signal, and a plurality of light-emitting chips 2 are located on the driving backplane 1 and are electrically connected to the driving backplane 1. The light-emitting chips 2 serve as sub-pixels for image display. In some embodiments, the light-emitting chips 2 may include a red light chip, a green light chip, and a blue light chip, wherein the red light chip is used to emit red light, the green light chip is used to emit green light, and the blue light chip is used to emit blue light, thereby achieving full-color display. Alternatively, in some embodiments, the light-emitting chips 2 may be used to emit light of the same color, and then cooperate with a color conversion component to achieve full-color display.

[0059] In an embodiment of the present invention, for each frame image, each light-emitting chip displays the first image and the second image in a time-sharing manner, and the switching frequency of the first image and the second image is greater than the frequency recognizable by the human eye, thereby utilizing the human eye retention effect to synthesize the first image and the second image into the current frame image.

[0060] The light deflection layer 5 is located on the light-emitting side of each light-emitting chip 2. When each light-emitting chip 2 displays a first image, the light of the first image is incident on the light deflection layer 5, and the light deflection layer 5 is configured to deflect the incident light of the first image at a set angle and then emit it; when each light-emitting chip 2 displays a second image, the light of the second image is incident on the light deflection layer 5, and the light deflection layer 5 is configured to directly transmit the incident light of the second image.

[0061] Therefore, without increasing the number of light-emitting chips, the light-emitting chips in conjunction with the light deflection layer 5 can double the pixel expansion, improve the display image resolution, effectively control costs, and avoid the problem of further reduction in production yield due to a significant increase in the number of light-emitting chips.

[0062] In some embodiments, the light deflection layer 5 may be a birefringent crystal layer, which utilizes the birefringence effect of the birefringent crystal to achieve light deflection. Figure 2 The second structural schematic diagram of the display device provided in the embodiment of the present invention.

[0063] like Figure 2 As shown, the display device further includes: a polarization conversion layer 3 and a phase retardation layer 4.

[0064] The polarization conversion layer 3 is located on the light-emitting side of the light-emitting chip 2, and is used to convert the emitted light of the light-emitting chip 2 into the first linear polarized light. In the embodiment of the present invention, the light-emitting chip 2 can be an LED chip, and its emitted light is usually natural light. Therefore, it is necessary to set a polarization conversion layer on the light-emitting side of the light-emitting chip to convert the natural light emitted by the light-emitting chip into linear polarized light.

[0065] The phase delay layer 4 is located on the side of the polarization conversion layer 3 away from the plurality of light-emitting chips 2. The phase delay layer is configured to generate a first phase delay amount and a second phase delay amount in a time-sharing manner. The light passing through the polarization conversion layer 3 is converted into a first linear polarized light, which is still the first linear polarized light under the action of the first phase delay amount, and is converted into the second linear polarized light under the action of the second phase delay amount; wherein the polarization directions of the first linear polarized light and the second linear polarized light are perpendicular to each other.

[0066] The light deflection layer 5 is located on the side of the phase retardation layer 4 away from the polarization conversion layer 3. The light deflection layer is made of birefringent crystals, which directly transmit the incident second linear polarized light and deflect the incident first linear polarized light at a set angle before emitting.

[0067] Specifically, the first linear polarized light and the second linear polarized light converted by the polarization conversion layer 3 and the phase delay layer 4 in the embodiment of the present invention can be p-light and s-light respectively, where p-light is a linear polarized light with a vibration direction parallel to the incident plane, and s-light is a linear polarized light with a vibration direction perpendicular to the incident plane. In birefringent crystals, ordinary light (o-light) and extraordinary light (e-light) are usually included, where o-light follows the law of refraction, and e-light deviates from the original refraction route. In a birefringent crystal, the vibration direction of o-light is perpendicular to the principal plane, and the polarization direction of e-light is parallel to the principal plane, and the principal plane is the plane formed by the light in the crystal and the optical axis of the crystal. Then, when the optical axis of the birefringent crystal is parallel to the incident plane, that is, when the principal plane of the birefringent crystal coincides with the incident plane, the first linear polarized light and the second linear polarized light converted by the polarization conversion layer 3 and the phase delay layer 4 will propagate along the optical paths of e-light and o-light respectively when incident on the birefringent crystal, where the first linear polarized light will be polarized along the optical path of e-light, and the second linear polarized light will propagate along the optical path of o-light. Therefore, the optical paths of the first linear polarized light and the second linear polarized light can be separated, so as to realize two pixel points by one light-emitting chip.

[0068] Figure 3 The third structural diagram of the display device provided by the embodiment of the present invention is as follows: Figure 4 A schematic diagram of the planar structure of a polarization conversion unit provided in an embodiment of the present invention.

[0069] In some embodiments, Figure 3 As shown, the polarization conversion layer 3 may include a plurality of polarization conversion units 31, and one polarization conversion unit 31 is disposed corresponding to one light emitting chip 2. For example, the polarization conversion unit 31 may be disposed on the light emitting surface of the corresponding light emitting chip 2.

[0070] Specifically, Figure 4As shown, the polarization conversion unit 31 can be a metal wire grid covering the light-emitting surface of the corresponding light-emitting chip 2. The metal wire grid includes a plurality of parallel metal wires 311, which utilize the surface plasmon resonance effect of the metal to transmit p-light and reflect s-light, thereby converting the light emitted by the light-emitting chip 2 into p-light. In addition, other types of polarizers can also be used as the polarization conversion unit 31, which is not limited here.

[0071] Figure 5 A schematic diagram of the structure of a phase delay layer in one state provided by an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a phase retardation layer in another state provided by an embodiment of the present invention.

[0072] In some embodiments, Figure 5 and Figure 6 As shown, the phase retardation layer may adopt a liquid crystal cell. Specifically, the phase retardation layer may include: a first substrate 41 , a second substrate 42 , a liquid crystal layer 43 , a first electrode layer 44 and a second electrode layer 45 .

[0073] The first substrate 41 and the second substrate 42 are arranged relatively parallel to each other, and the first substrate 41 and the second substrate 42 are spaced a set distance apart. The first substrate 41 and the second substrate 42 can be glass substrates or resin substrates with high light transmittance, which are not limited here. The first substrate 41 and the second substrate 42 can generally be rectangular or square structures, and their size needs to cover all light-emitting chips 2 and the polarization conversion layer 3 on their light-emitting surfaces.

[0074] The liquid crystal layer 43 is located between the first substrate 41 and the second substrate 42, the first electrode layer 44 is located between the first substrate 41 and the liquid crystal layer 43, and the second electrode layer 45 is located between the second substrate 42 and the liquid crystal layer 43. In the manufacturing process, the first electrode layer 44 is usually manufactured on the first substrate 41, and the second electrode layer 45 is manufactured on the second substrate 42. The first electrode layer 44 and the second electrode layer 45 are planar electrodes, and an alignment layer is formed on the surface of the first electrode layer 44 and the second electrode layer 45. Then, the first substrate 41 with the first electrode layer 44 and the edge of the second electrode layer 45 and the second substrate 42 are sealed, and liquid crystal is poured in, so as to form a liquid crystal box. The liquid crystal molecules in the liquid crystal layer 43 have an initial state under the action of the alignment layer.

[0075] In a specific implementation, applying different electric signals to the first electrode layer 44 and the second electrode layer 45 can cause the liquid crystal molecules in the liquid crystal layer 43 to have different flipping states, so that the first electrode layer 44 and the second electrode layer 45 produce a first phase delay when the first signal is applied, and produce a second phase delay when the second signal is applied.

[0076] In the embodiment of the present invention, the first phase delay amount can be set to 0 and the second phase delay amount can be set to π, so that the liquid crystal cell is Figure 5 In the initial state shown, the first phase retardation can be generated, that is, the liquid crystal cell can directly transmit the first linear polarized light without power (the first signal is 0). The state where the liquid crystal cell generates the second phase retardation is shown in FIG. Figure 6 At this time, the second signal is applied to the liquid crystal box, and the liquid crystal molecules in the liquid crystal layer 43 flip in the same direction under the action of the electric field generated by the second signal, thereby generating a second phase delay (π), so that the incident first linear polarized light is converted into the second linear polarized light. Then, the liquid crystal box only needs to be driven under power (applying the second signal) and without power to switch between generating the first phase delay and the second phase delay.

[0077] Figure 7 A schematic diagram of a birefringent crystal provided in an embodiment of the present invention.

[0078] The light deflection layer 5 is made of birefringent crystal material, and the birefringent crystal layer can be a flat plate structure with a set thickness, and its size can be the same as that of the phase delay layer 4. Figure 7 As shown, the birefringent crystal layer (light deflection layer 5) may include a light incident surface s1 and a light emitting surface s2 which are parallel to each other, and the optical axis of the birefringent crystal layer is not perpendicular to the light incident surface s1 but is at a set angle.

[0079] In a birefringent crystal, the o-light and the e-light will not separate only when they propagate in a direction parallel to the optical axis. When the optical axis is not perpendicular to the incident surface of the birefringent crystal layer and is at a set angle, when the natural light is perpendicular to the incident surface s1 of the birefringent crystal layer, the incident direction of the incident light is not parallel to the optical axis. In the birefringent crystal, the o-light propagates perpendicularly to the light-emitting surface s2 according to the law of refraction, while the e-light deviates from the original propagation direction and propagates at a set angle to the light-emitting surface s2, thereby causing the incident natural light to produce two beams of refracted light.

[0080] In the embodiment of the present invention, when each light-emitting chip 2 displays a frame of image, its emitted light generates a first linear polarized light for displaying the first image and a second linear polarized light for displaying the second image under the action of the polarization conversion layer 3 and the phase delay layer 4. The vibration direction of the first linear polarized light is parallel to the light incident surface, and after vertically incident on the birefringent crystal layer (light deflection layer 5), it will be deflected by a set angle along the propagation direction of the e-light, and will be refracted again at the light-exiting surface s2 of the birefringent crystal layer and emitted outward; the vibration direction of the second linear polarized light is perpendicular to the light incident surface, and after vertically incident on the birefringent crystal layer (light deflection layer 5), it will be emitted outward perpendicularly to the light-exiting surface s2 along the propagation direction of the o-light, thereby causing the first image to move a set distance relative to the second image, and the first image and the second image are synthesized as the frame image, so that the display resolution is doubled without increasing the number of light-emitting chips 2, and the display resolution of the display device is twice the physical resolution.

[0081] In some embodiments, each light-emitting chip 2 in the display device may be the same light-emitting chip 2, which is used to emit light of the same color, and cooperates with the color conversion layer to achieve full-color display.

[0082] For example, the light-emitting chip 2 may be a blue Mini LED chip or a blue Micro LED chip. Figure 8 A schematic diagram of the cross-sectional structure of a light-emitting chip provided in an embodiment of the present invention.

[0083] like Figure 8 As shown, the light emitting chip includes a substrate 21, a first doping layer 22, a light emitting layer 23, a second doping layer 24, a first electrode e1 and a second electrode e2.

[0084] When the light-emitting chip 2 adopts a blue light Mini LED chip or a blue light Micro LED chip, its growth substrate is usually sapphire, but the sapphire substrate is usually opaque, so it needs to be replaced with a translucent substrate 21 after the LED epitaxial structure is formed. The first doping layer 22 and the second doping layer 24 are P-type doping layers and N-type doping layers, respectively, and the light-emitting layer can be a multi-quantum well light-emitting layer, using compound materials such as gallium nitride (GaN), indium gallium nitride (InGaN), zinc arsenide (ZnSe), etc., which are not limited here.

[0085] like Figure 8 As shown, when manufacturing the light emitting chip 2 , the polarization conversion unit 31 (eg, a metal wire grid) can be directly manufactured on the substrate 21 .

[0086] Fig. 9 The fourth structural diagram of the display device provided by the embodiment of the present invention is as follows: Fig.10 A schematic diagram of the planar structure of a color conversion layer provided in an embodiment of the present invention.

[0087] like Fig. 9 As shown, the display device also includes: a color conversion layer 6, and the color conversion layer 6 is located on the side of the light deflection layer 5 away from the phase delay layer 4. The color conversion layer 6 includes a plurality of color conversion units and diffusion units arranged in an array. Among them, the color conversion unit can be made of quantum dot materials, and quantum dots are dispersed in the quantum dot material. By changing the particle size of the quantum dots, the quantum dots can be stimulated to emit light of different wavelengths. Quantum dot materials have the advantages of high color gamut and good color rendering. In addition, the color conversion unit can also be made of materials with color conversion properties such as fluorescent conversion materials, which are not limited here.

[0088] In the embodiment of the present invention, Fig. 9 As shown, every two adjacent color conversion units form a color conversion unit group 61, and the two color conversion units in the color conversion unit group are a first color conversion unit 611 and a second color conversion unit 612. Similarly, every two adjacent diffusion units form a diffusion unit group 62, and the two diffusion units in the diffusion unit group 62 are a first diffusion unit 621 and a second diffusion unit 622.

[0089] In order to achieve full-color display, the color conversion unit is divided into a red conversion unit and a green conversion unit. Fig.10 As shown, every two adjacent red conversion units form a red conversion unit group 61r, and every two adjacent green conversion units form a green conversion unit group 61g; each red conversion unit group 61r, each green conversion unit group 61g and each diffusion unit group 62 are arranged in an array according to a set order. Among them, the two red conversion units included in the red conversion unit group 61r are respectively a first red conversion unit 611r and a second red conversion unit 612r, and the two green conversion units included in the green conversion unit group are respectively a first green conversion unit 611g and a second green conversion unit 612g. The red conversion unit is used to convert the incident blue light into red light, the green conversion unit is used to convert the incident blue light into green light, and the diffusion unit is used to diffuse the incident blue light.

[0090] One color conversion unit group 61 is provided corresponding to one light emitting chip 2, and the orthographic projection of the first color conversion unit 611 in the color conversion unit group 61 on the driving backplane 1 covers the position of the corresponding light emitting chip 2, and the orthographic projection of the second color conversion unit 612 on the driving backplane 1 does not overlap with the position of the corresponding light emitting chip 2. One diffusion unit group 62 is provided corresponding to one light emitting chip 2, and the orthographic projection of the first diffusion unit 621 in the diffusion unit group 62 on the driving backplane 1 covers the position of the corresponding light emitting chip 2, and the orthographic projection of the second diffusion unit 622 on the driving backplane 1 does not overlap with the position of the corresponding light emitting chip 2.

[0091] The first linear polarized light emitted by each light-emitting chip 2 after passing through the light deflection layer will deviate from the original propagation direction and enter the corresponding second color conversion unit and each second diffusion unit; the second linear polarized light emitted by each light-emitting chip after passing through the light deflection layer will enter the corresponding first color conversion unit and each first diffusion unit. Thus, the positions of each first color conversion unit 611 and each first diffusion unit 621 constitute the sub-pixel points for displaying the second image, and the positions of each second color conversion layer 612 and each second diffusion unit 622 constitute the sub-pixel points for displaying the first image. When each light-emitting chip 2 displays each frame of image, it quickly switches between the first image and the second image, and the first image and the second image can be synthesized into the current frame image by using the human eye retention effect, so as to realize high-resolution image display.

[0092] Another aspect of the embodiments of the present invention further provides a display control method based on any of the above display devices. Fig.11 The present invention provides a flow chart of a display control method for a display device according to an embodiment of the present invention.

[0093] like Fig.11 As shown, a display control method of a display device includes:

[0094] S10, when displaying an image, driving each light-emitting chip in a time-sharing manner to display a first image and a second image for each frame of the image;

[0095] S20, when each light-emitting chip displays a first image, applying a first signal to the phase delay layer so that the phase delay layer generates a first phase delay; when each light-emitting chip displays a second image, applying a second signal to the phase delay layer so that the phase delay layer generates a second phase delay.

[0096] In the embodiment of the present invention, the first frame image displayed by the display device is synthesized by the first image and the second image switched and displayed by each light-emitting chip. The display device includes a driving backplane, light-emitting chips arranged in an array on the driving backplane, and a polarization conversion layer, a phase delay layer and a light deflection layer sequentially arranged on the light-emitting side of each light-emitting chip.

[0097] When each light-emitting chip displays a first image, the polarization conversion layer converts the output light of each light-emitting chip into the first linear polarized light, and at the same time, the phase delay layer generates a first phase delay when displaying the first image, so that the first linear polarized light remains the first linear polarized light after passing through the phase delay layer. When each light-emitting chip displays a second image, the polarization conversion layer converts the output light of each light-emitting chip into the first linear polarized light, and at the same time, the phase delay layer generates a second phase delay when displaying the second image, so that the first linear polarized light is converted into the second linear polarized light after passing through the phase delay layer. The polarization directions of the first linear polarized light and the second linear polarized light are perpendicular to each other, and the vibration direction of the first linear polarized light is parallel to the light incident surface, and the vibration direction of the second linear polarized light is perpendicular to the light incident surface.

[0098] The light deflection layer uses a birefringent crystal layer. After passing through the phase delay layer, the light of the first image is incident on the birefringent crystal layer and will be deflected at a certain angle according to the path of e light before being emitted. After passing through the phase delay layer, the light of the second image is incident on the birefringent crystal and will be emitted directly according to the path of o light. As a result, the first image is offset by a set distance relative to the second image, which is equivalent to doubling the number of sub-pixels.

[0099] In a specific implementation, the frequency at which each light-emitting chip switches to display the first image and the second image is the same as the frequency at which the phase delay layer is switched to apply the first signal and the second signal, and the switching frequency is greater than the frequency recognizable by the human eye. The refresh frequency of the display device when displaying a frame image also needs to be greater than the frequency recognizable by the human eye. For example, when the refresh frequency of the frame image is 60Hz, the switching frequency of the first image and the second image is 120Hz.

[0100] According to the first inventive concept, the display device includes: a driving backplane, a plurality of light-emitting chips electrically connected to the driving backplane, and a light deflection layer on the light-emitting side of the light-emitting chip. For each frame of an image, each light-emitting chip displays a first image and a second image in a time-sharing manner. The light deflection layer is configured to deflect the incident light of the first image at a set angle and then emit it, and directly transmit the incident light of the second image. Without increasing the number of light-emitting chips, the light-emitting chips and the light deflection layer can double the pixel expansion, improve the resolution of the displayed image, effectively control costs, and avoid the problem of further reduction in production yield due to a significant increase in the number of light-emitting chips.

[0101] According to the second inventive concept, the display device further includes: a polarization conversion layer and a phase delay layer. The polarization conversion layer is located on the light-emitting side of the light-emitting chip, and is used to convert the emitted light of the light-emitting chip into a first linear polarized light. The phase delay layer is located on the side of the polarization conversion layer away from the plurality of light-emitting chips. The phase delay layer is configured to generate a first phase delay amount and a second phase delay amount in a time-sharing manner. The first linear polarized light is still the first linear polarized light under the action of the first phase delay amount, and the first linear polarized light is converted into a second linear polarized light with a perpendicular polarization direction under the action of the second phase delay amount. The light deflection layer uses a birefringent crystal and is located on the side of the phase delay layer away from the polarization conversion layer. Its function is to directly transmit the incident second linear polarized light, deflect the incident first linear polarized light at a set angle and then emit it, so that the optical paths of the first linear polarized light and the second linear polarized light can be separated, so as to achieve the purpose of realizing two pixel points by one light-emitting chip.

[0102] According to the third inventive concept, the polarization conversion layer may include a plurality of polarization conversion units, and one polarization conversion unit is disposed corresponding to one light emitting chip.

[0103] According to the fourth invention concept, the polarization conversion unit can be a metal wire grid covering the light-emitting surface of the corresponding light-emitting chip. The metal surface plasmon resonance effect is used to transmit p light and reflect s light, thereby converting the light emitted by the light-emitting chip into p light.

[0104] According to the fifth inventive concept, the phase retardation layer may be a liquid crystal cell, which generates a first phase retardation amount when driven by a first signal and generates a second phase retardation amount when driven by a second signal.

[0105] According to the sixth inventive concept, the first phase delay is 0 and the second phase delay is π, so that the liquid crystal box can generate the first phase delay in the initial state. Then the liquid crystal box only needs to be driven under power on and under no power on to switch between generating the first phase delay and the second phase delay.

[0106] According to the seventh inventive concept, the light deflection layer uses a birefringent crystal, and the optical axis of the birefringent crystal is not parallel to the incident direction of the incident light.

[0107] According to the eighth inventive concept, the light emitting chip adopts a blue light Mini LED chip or a blue light Micro LED chip, and the display device further comprises a color conversion layer. The color conversion layer comprises a plurality of color conversion units and a diffusion unit, for realizing full-color display.

[0108] According to the ninth inventive concept, a display control method for a display device includes: when displaying an image, driving each light-emitting chip to display a first image and a second image in a time-sharing manner for each frame of image; when each light-emitting chip displays the first image, applying a first signal to a phase delay layer so that the phase delay layer generates a first phase delay amount; when each light-emitting chip displays the second image, applying a second signal to the phase delay layer so that the phase delay layer generates a second phase delay amount.

[0109] According to the tenth inventive concept, the frequency at which each light-emitting chip switches to display the first image and the second image is the same as the frequency at which the phase delay layer is switched to apply the first signal and the second signal, and the switching frequency is greater than the frequency recognizable by the human eye. The refresh frequency of the display device when displaying a frame image also needs to be greater than the frequency recognizable by the human eye.

[0110] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0111] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A display device, characterized in that: include: A driving backplane, used for providing a driving signal; A plurality of light-emitting chips are located on the driving backplane; The plurality of light emitting chips are electrically connected to the driving backplane; For each frame image, the plurality of light-emitting chips display a first image and a second image in a time-sharing manner, and the first image and the second image are combined into a current frame image; and The light deflection layer is located at the light-emitting side of the plurality of light-emitting chips; the light deflection layer is configured to deflect the incident light of the first image at a set angle and then emit it, and directly transmit the incident light of the second image.

2. The display device according to claim 1, wherein: Also includes: A polarization conversion layer, located at the light-emitting side of the plurality of light-emitting chips, and used for converting the emitted light of the plurality of light-emitting chips into a first linearly polarized light; and a phase delay layer, located on a side of the polarization conversion layer away from the plurality of light-emitting chips; the phase delay layer is configured to generate a first phase delay when the plurality of light-emitting chips display the first image, and to generate a second phase delay when the plurality of light-emitting chips display the second image; the first linear polarized light is still the first linear polarized light under the effect of the first phase delay, and the first linear polarized light is converted into the second linear polarized light under the effect of the second phase delay; the polarization directions of the first linear polarized light and the second linear polarized light are perpendicular to each other; The light deflection layer is located on a side of the phase retardation layer away from the polarization conversion layer; the light deflection layer is configured to directly transmit the incident second linear polarized light and deflect the incident first linear polarized light at a set angle before emitting.

3. The display device according to claim 2, wherein: The polarization conversion layer includes a plurality of polarization conversion units; the plurality of polarization conversion units correspond one-to-one to the plurality of light emitting chips.

4. The display device according to claim 3, characterized in that The polarization conversion unit is a metal wire grid covering the corresponding light emitting surface of the light emitting chip.

5. The display device according to claim 2, wherein: The phase delay layer comprises: a first substrate; a second substrate, arranged opposite to the first substrate; a liquid crystal layer, located between the first substrate and the second substrate; A first electrode layer is located between the first substrate and the liquid crystal layer; and a second electrode layer, located between the second substrate and the liquid crystal layer; The first electrode layer and the second electrode layer are configured to be applied with a first signal and a second signal in a time-sharing manner; the first signal causes the liquid crystal layer to generate the first phase delay, and the second signal causes the liquid crystal layer to generate the second phase delay.

6. The display device according to claim 5, characterized in that The first phase delay amount is 0, and the second phase delay amount is π.

7. The display device according to claim 2, wherein: The light deflection layer is a birefringent crystal layer; the birefringent crystal layer comprises a light incident surface and a light emitting surface which are parallel to each other, and the optical axis of the birefringent crystal layer forms a set angle with the light incident surface; The incident direction of the light incident from the light incident surface of the birefringent crystal layer is not parallel to the optical axis.

8. The display device according to any one of claims 1 to 7, characterized in that: The plurality of light emitting chips emit light of the same color; the display device further comprises: A color conversion layer is located on a side of the light deflection layer away from the plurality of light-emitting chips; the color conversion layer comprises a plurality of color conversion units and diffusion units arranged in an array; Wherein, every two adjacent color conversion units form a color conversion unit group, and the two color conversion units in the color conversion unit group are a first color conversion unit and a second color conversion unit; one color conversion unit group is arranged corresponding to one light-emitting chip, and the orthographic projection of the first color conversion unit in the color conversion unit group on the driving backplane covers the position where the corresponding light-emitting chip is located, and the orthographic projection of the second color conversion unit on the driving backplane does not overlap with the position where the corresponding light-emitting chip is located; Every two adjacent diffusion units form a diffusion unit group, and the two diffusion units in the diffusion unit group are a first diffusion unit and a second diffusion unit; one diffusion unit group is arranged corresponding to one light-emitting chip, and the orthographic projection of the first diffusion unit in the diffusion unit group covers the position where the corresponding light-emitting chip is located on the driving backplane, and the orthographic projection of the second diffusion unit on the driving backplane does not overlap with the position where the corresponding light-emitting chip is located; The first linear polarized light emitted by each light-emitting chip through the light deflection layer is incident on the corresponding second color conversion unit and the second diffusion unit; the second linear polarized light emitted by each light-emitting chip through the light deflection layer is incident on the corresponding first color conversion unit and the first diffusion unit; Wherein, the light-emitting chip is a blue light MiniLED chip or a blue light Micro LED chip; The multiple color conversion units are divided into multiple red conversion units and multiple green conversion units; every two adjacent red conversion units form a red conversion unit group, and every two adjacent green conversion units form a green conversion unit group; each red conversion unit group, each green conversion unit group and each diffusion unit group are arranged in an array according to a set order.

9. A display control method for a display device according to any one of claims 1 to 8, characterized in that: include: When displaying an image, for each frame of image, each light-emitting chip is driven in a time-sharing manner to display a first image and a second image; the first image and the second image are combined into a current frame of image; When each light-emitting chip displays the first image, a first signal is applied to the phase delay layer to cause the phase delay layer to produce a first phase delay; when each light-emitting chip displays the second image, a second signal is applied to the phase delay layer to cause the phase delay layer to produce a second phase delay.

10. The display control method according to claim 9, characterized in that: The frequency at which each light-emitting chip switches to display the first image and the second image is the same as the frequency at which the phase delay layer is switched to apply the first signal and the second signal, and the switching frequency is greater than a frequency recognizable by human eyes.

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