Backlight module and display

Abstract

The utility model discloses a backlight module and a display, which are applied to the technical field of display, and comprise an LED lamp bead array and a driving unit, the LED lamp bead array comprises LED lamp beads of at least two color gamut grades; the LED lamp beads with different color gamut grades are alternately arranged along a first extension direction of the LED lamp bead array and are alternately arranged along a second extension direction of the LED lamp bead array; the driving unit comprises at least two control circuits; and the control circuit is electrically connected with the LED lamp beads with different color gamut grades one by one. According to the utility model, richer and more accurate color expression can be provided, so that the display can present more varieties and brighter colors; meanwhile, the visual experience of the user can be improved, images, videos and other visual contents are more vivid, and the immersion and enjoyment of the watched contents are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of display, and particularly relates to a backlight module and a display. Background Art

[0002] With the progress of technology and the continuous development of display technology, users have put forward higher requirements for the visual experience and color performance of displays. Different application scenarios require different color gamut display environments to obtain the best visual experience. For example, in scenarios such as graphic design, film and television production, and medical imaging, the display needs to display in a high-color gamut display environment; in the daily use scenarios of ordinary users, the display needs to display in a low-color gamut display environment. However, the backlight module of traditional displays generally uses a single light source, which cannot achieve displays with different color gamuts and is not applicable to different application scenarios; moreover, the color gamut of this light source is relatively narrow, and there are some limitations in color performance, unable to accurately restore the colors in the input signal and not applicable to scenarios with high color requirements. Therefore, how to expand the color gamut of a display and improve the color restoration ability is a technical problem that those skilled in the art need to solve currently. Summary of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a backlight module and a display. By adjusting the spectral characteristics of the backlight source and optimizing the optical path design and other methods, the color gamut of the display is expanded and the color restoration ability is improved, which can provide richer and more accurate color performance, enabling the display to present more types and more vivid colors; at the same time, it can enhance the user's visual experience, making images, videos, and other visual contents more realistic and vivid, and enhancing the immersion and enjoyment of the viewing content.

[0004] To solve the above technical problems, the utility model provides a backlight module, including: an LED lamp bead array and a driving unit;

[0005] The LED lamp bead array includes at least two color gamut level LED lamp beads; the different color gamut level LED lamp beads are alternately arranged along the first extension direction of the LED lamp bead array and alternately arranged along the second extension direction of the LED lamp bead array;

[0006] The driving unit includes at least two control circuits; the control circuits are electrically connected to the different color gamut level LED lamp beads one by one.

[0007] Optionally, the LED lamp bead array includes low-color gamut LED lamp beads and high-color gamut LED lamp beads;

[0008] The driving unit includes a first control circuit and a second control circuit; the first control circuit is electrically connected to the low-color gamut LED lamp beads; the second control circuit is electrically connected to the high-color gamut LED lamp beads.

[0009] Optionally, the low color gamut LED lamp beads are YAG lamp beads; the YAG lamp beads are fixedly connected to the PCB board through solder paste;

[0010] The YAG lamp beads include a bracket, an LED chip, and encapsulating silica gel; the LED chip is disposed inside the bracket, fixedly connected to the bottom of the bracket through die bonding glue, and electrically connected to the PCB board through bonding wires; the encapsulating silica gel is filled inside the bracket, and YAG phosphor is mixed in the encapsulating silica gel.

[0011] Optionally, the high color gamut LED lamp beads are KSF lamp beads; the KSF lamp beads are fixedly connected to the PCB board through solder paste;

[0012] The KSF lamp beads include a bracket, an LED chip, and encapsulating silica gel; the LED chip is disposed inside the bracket, fixedly connected to the bottom of the bracket through die bonding glue, and electrically connected to the PCB board through bonding wires; the encapsulating silica gel is filled inside the bracket, and KSF phosphor is mixed in the encapsulating silica gel.

[0013] Optionally, the LED lamp bead array includes at least two LED lamp strings; the LED lamp strings extend along a first direction and are arranged along a second direction; each LED lamp string includes at least one of the low color gamut LED lamp beads and at least one of the high color gamut LED lamp beads.

[0014] Optionally, the driving unit includes a main board and a backlight driving board; the backlight driving board is provided with an MCU, at least two first backlight driving chips, at least two second backlight driving chips, at least two first control units, and at least two second control units;

[0015] The main board is electrically connected to the MCU, the MCU is electrically connected to the first backlight driving chip, the first backlight driving chip is electrically connected to the first control unit, and the first control unit is electrically connected to the low color gamut LED lamp beads, constituting the first control circuit;

[0016] The main board is electrically connected to the MCU, the MCU is electrically connected to the second backlight driving chip, the second backlight driving chip is electrically connected to the second control unit, and the second control unit is electrically connected to the high color gamut LED lamp beads, constituting the second control circuit.

[0017] Optionally, the main board is electrically connected to the MCU through an SPI data bus;

[0018] The first backlight driving chip and the second backlight driving chip are connected to form a daisy chain structure; the MCU is electrically connected to the daisy chain structure through an SPI data bus.

[0019] Optionally, the first control unit is a MOS transistor;

[0020] The second control unit is a MOS transistor.

[0021] Optionally, the main board includes a SOC chip or an FPGA chip;

[0022] The MCU is a single-chip microcomputer.

[0023] To solve the above technical problems, the present utility model provides a display, including: the above-mentioned backlight module.

[0024] Optionally, the display further includes: a controller; the controller is wirelessly connected to the driving unit.

[0025] It can be seen that the present utility model includes: the LED bead array includes at least two color gamut level LED beads; the different color gamut level LED beads are alternately arranged along the first extension direction of the LED bead array and alternately arranged along the second extension direction of the LED bead array; the driving unit includes at least two control circuits; the control circuits are electrically connected to the different color gamut level LED beads one by one. The present utility model adopts at least two color gamut level LED beads, and the different color gamut level LED beads are alternately arranged along different directions, improving the uniformity of the backlight. Moreover, the different color gamut level LED beads are connected to different control circuits, and the brightness of the different color gamut level LED beads can be independently controlled to achieve a local dimming effect. When a certain color gamut mode needs to be displayed, the LED beads of that color gamut are controlled to light up, and the LED beads of other color gamuts are controlled to reduce brightness or turn off, achieving the effect of displaying different color gamuts. This allows users to experience different color gamut effects on the same display, enhancing the user's visual experience, making images, videos, and other visual content more vivid and realistic, and enhancing the immersion and enjoyment of the viewing content.

[0026] This application also provides a display that adopts the above-mentioned backlight module and has the same beneficial effects. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0028] Figure 1 A schematic structural diagram of an LED lamp bead array provided by an embodiment of the present invention;

[0029] Figure 2 A schematic structural diagram of an LED lamp bead provided by an embodiment of the present invention;

[0030] Figure 3 A schematic structural diagram of a driving unit provided by an embodiment of the present invention;

[0031] Figure 4 A signal transmission schematic diagram of a driving unit provided by an embodiment of the present invention.

[0032] The description of the reference numerals is as follows:

[0033] 11 - Low - color - gamut LED lamp beads; 111 - YAG lamp beads; 12 - High - color - gamut LED lamp beads; 121 - KSF lamp beads; 21 - Bracket; 22 - LED chip; 23 - Encapsulation silica gel; 24 - Die - bonding glue; 25 - Bonding wire; 26 - Phosphor; 31 - Main board; 32 - MCU; 33 - Backlight driving chip; 4 - SPI data bus. Specific embodiments

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1 to 3 , a backlight module provided by an embodiment of the present invention may include: an LED (Light Emitting Diode) lamp bead array and a driving unit;

[0036] The LED lamp bead array includes at least two color - gamut - level LED lamp beads; the different color - gamut - level LED lamp beads are alternately arranged along a first extension direction of the LED lamp bead array and alternately arranged along a second extension direction of the LED lamp bead array;

[0037] The driving unit includes at least two control circuits; the control circuits are electrically connected to the different color - gamut - level LED lamp beads one by one.

[0038] This embodiment does not limit the specific types and quantities of LED lamp beads. For example, the LED lamp bead array may include low-color gamut LED lamp beads 11 and high-color gamut LED lamp beads 12; the LED lamp bead array may also include low-color gamut LED lamp beads 11, medium-color gamut LED lamp beads, and high-color gamut LED lamp beads 12; the LED lamp bead array may further include combinations of other LED lamp beads with different color gamut levels.

[0039] Only the case where the LED lamp bead array includes two color gamut levels of LED lamp beads is described below. The case where the LED lamp bead array in this embodiment includes three or more color gamut levels of LED lamp beads is the same, and all can refer to the description of the case where there are two color gamut levels of LED lamp beads.

[0040] When the LED lamp bead array includes low-color gamut LED lamp beads 11 and high-color gamut LED lamp beads 12, correspondingly, the driving unit may include a first control circuit and a second control circuit; the first control circuit is electrically connected to the low-color gamut LED lamp beads 11; the second control circuit is electrically connected to the high-color gamut LED lamp beads 12.

[0041] This embodiment does not limit the specific structure of the LED lamp bead array, as long as it is ensured that the low-color gamut LED lamp beads 11 and the high-color gamut LED lamp beads 12 are alternately arranged in both the first direction and the second direction. For example, as Figure 1 shown, the LED lamp bead array may include at least two LED lamp strings; the LED lamp strings extend in the first direction and are arranged in the second direction; each LED lamp string includes at least one low-color gamut LED lamp bead 11 and at least one high-color gamut LED lamp bead 12. In this embodiment, each LED lamp string can be prepared by a soldering process to fix the low-color gamut LED lamp beads 11 and the high-color gamut LED lamp beads 12 in an alternating arrangement on a PCB (Printed Circuit Board) board, and each LED lamp bead is independently wired and connected on the PCB board.

[0042] This embodiment does not limit the specific type of the low-color gamut LED lamp beads 11, as long as it can display a low color gamut. For example, the low-color gamut LED lamp beads 11 can be YAG (Yttrium Aluminum Garnet) lamp beads. This embodiment does not limit the specific connection method between the YAG lamp beads and the PCB board. The YAG lamp beads can be, but are not limited to, fixedly connected to the PCB board through solder paste. This embodiment does not limit the specific structure of the YAG lamp beads. The YAG lamp beads can be, but are not limited to, including a bracket 21, an LED chip 22, and encapsulation silicone 23; the LED chip 22 is arranged inside the bracket 21, fixedly connected to the bottom of the bracket 21 through die bonding glue 24, and electrically connected to the PCB board through a bonding wire 25; the encapsulation silicone 23 fills the inside of the bracket 21, and YAG phosphor powder is mixed in the encapsulation silicone 23.

[0043] This embodiment does not limit the specific type of the high - color - gamut LED lamp beads 12, as long as it can ensure the display of a high color gamut. For example, the high - color - gamut LED lamp beads 12 can be KSF (belonging to the fluoride system) lamp beads. This embodiment does not limit the specific connection method between the KSF lamp beads and the PCB board. The KSF lamp beads can be, but are not limited to, fixedly connected to the PCB board through solder paste. This embodiment does not limit the specific structure of the KSF lamp beads. The KSF lamp beads can be, but are not limited to, including a bracket 21, an LED chip 22, and encapsulation silicone 23. The LED chip 22 is arranged inside the bracket 21, fixedly connected to the bottom of the bracket 21 through die - bonding glue 24, and electrically connected to the PCB board through a bonding wire 25. The encapsulation silicone 23 is filled inside the bracket 21, and KSF phosphor powder is mixed in the encapsulation silicone 23.

[0044] The structures of the YAG lamp beads and the KSF lamp beads are as Figure 2 shown. Among them, YAG phosphor powder 26 is used in the YAG lamp beads; KSF phosphor powder 26 is used in the KSF lamp beads. Different excited - state transitions generate different photon bands. The atomic excited states of the YAG phosphor powder are dispersed, generating yellow - green photons when excited, and the spectral energy distribution is relatively dispersed, resulting in a low color gamut. The KSF phosphor powder generates green and red photons when excited, and the spectral energy is distributed in a three - peak pattern, with the generated photon energy concentrated and a wide color gamut.

[0045] This embodiment does not limit the specific structure of the driving unit, as long as it can ensure zonal control. For example, as Figure 3 shown, the driving unit can include a main board 31 and a backlight driving board. The backlight driving board is provided with an MCU 32 (Microcontroller Unit), at least two first backlight driving chips, at least two second backlight driving chips, at least two first control units, and at least two second control units.

[0046] The main board 31 is electrically connected to the MCU 32, the MCU 32 is electrically connected to the first backlight driving chip, the first backlight driving chip is electrically connected to the first control unit, and the first control unit is electrically connected to the low - color - gamut LED lamp beads 11, forming a first control circuit.

[0047] The main board 31 is electrically connected to the MCU 32, the MCU 32 is electrically connected to the second backlight driving chip, the second backlight driving chip is electrically connected to the second control unit, and the second control unit is electrically connected to the high - color - gamut LED lamp beads 12, forming a second control circuit.

[0048] The driving unit of this embodiment can also be directly arranged on the power board.

[0049] This embodiment adopts the local dimming technology. By dividing the backlight into multiple independent regions, each region corresponds to an LED lamp bead, and the brightness of each region can be independently controlled to achieve the local dimming effect. This local dimming can improve the contrast and black level, enhancing the detail performance and color accuracy of the image. The local dimming technology dynamically adjusts the brightness level of each region, enabling the display to present bright and dark regions simultaneously in the same picture, providing a better visual experience. At the same time, through this technology, different color gamut lamp beads can be excited to achieve the effect of displaying different color gamuts.

[0050] This embodiment does not limit the specific connection method between the main board 31 and the MCU 32, as long as it is ensured that the main board 31 and the MCU 32 can be electrically connected. For example, as Figure 3 shown, the main board 31 can be electrically connected to the MCU 32 through the SPI (Serial Peripheral Interface) data bus.

[0051] This embodiment does not limit the specific connection method between the MCU 32 and the first backlight driving chip and the second backlight driving chip, as long as it is ensured that the MCU 32 and the first backlight driving chip and the second backlight driving chip can be electrically connected. For example, the first backlight driving chip and the second backlight driving chip can be connected to form a daisy chain structure; as Figure 3 shown, the MCU 32 can be electrically connected to the daisy chain structure through the SPI data bus 4. The daisy chain structure in this embodiment refers to the overall structure formed by connecting the backlight driving chips 33 (including between the first backlight driving chip and the first backlight driving chip, between the first backlight driving chip and the second backlight driving chip, or between the second backlight driving chip and the second backlight driving chip) in a daisy chain manner.

[0052] This embodiment does not limit the specific type of the first control unit, as long as it can control the brightness of the low color gamut LED lamp beads 11. For example, the first control unit can be a MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) tube. This embodiment does not limit the specific type of the second control unit, as long as it can control the brightness of the high color gamut LED lamp beads 12. For example, the second control unit can be a MOS tube.

[0053] As Figure 3As shown in the figure, the zoning control in this embodiment can transmit the required brightness information to the MCU 32 through the main board 31 via the SPI data bus 4. After being processed by the MCU 32, it is also transmitted to the backlight driver chip 33 through the SPI data bus 4. The backlight driver chip 33 controls the MOS transistors to regulate the voltage and current of the backlight beads according to the received information, thereby controlling their brightness to achieve the effect of regional dimming.

[0054] This embodiment does not limit the specific structure of the main board 31. The main board 31 may include, but is not limited to, an SOC (System-on-Chip) chip or an FPGA (Field-Programmable Gate Array) chip. The required brightness information can be transmitted to the MCU 32 through the SOC chip or the FPGA chip.

[0055] This embodiment does not limit the specific type of the MCU 32. The MCU 32 may be, but is not limited to, a single-chip microcomputer.

[0056] Based on the above embodiments, the utility model adopts at least two color gamut level LED beads, and the LED beads of different color gamut levels are alternately arranged along different directions, which improves the uniformity of the backlight. Moreover, the LED beads of different color gamut levels are connected to different control circuits, and the brightness of the LED beads of different color gamut levels can be independently controlled to achieve the effect of local dimming. When a certain color gamut mode needs to be displayed, the LED beads of that color gamut are controlled to light up, and the LED beads of other color gamuts are controlled to reduce the brightness or turn off, so as to achieve the effect of displaying different color gamuts. This allows users to experience different color gamut effects on the same display, enhancing the user's visual experience, making images, videos, and other visual content more vivid and lifelike, and enhancing the immersion and enjoyment of the content being watched.

[0057] A display provided by an embodiment of the utility model may include: the above-mentioned backlight module.

[0058] This embodiment does not limit the specific type of the display. The display may be, but is not limited to, a liquid crystal display; the liquid crystal display may include the above-mentioned backlight module and a liquid crystal layer provided on the light-emitting surface of the backlight module. The light source emitted by the backlight module will be emitted after passing through the liquid crystal layer.

[0059] Further, this embodiment may further include: a controller; the controller is wirelessly connected to the driving unit. This embodiment does not limit the specific type of the controller. The controller may be, but is not limited to, a remote control. Since there are significant differences in the brightness and hue of different color gamut modes, in the user mode, the user can perform different PQ processing (i.e., signal processing) on different color gamut modes through the controller to provide a wider brightness range and better visual effects.

[0060] Based on the above embodiments, the present utility model adopts the above backlight module and also has the above beneficial effects.

[0061] To make the present utility model easier to understand, the working principles of the backlight module and the display provided by the embodiments of the present utility model will be described in detail below with reference to specific examples.

[0062] The liquid crystal display adopted in this embodiment includes the above backlight module and a liquid crystal layer disposed on the light-emitting surface of the backlight module.

[0063] The working process of this embodiment includes: the software user interface enables corresponding different color gamut modes; the driving unit of the power board turns on the backlights of different color gamuts; the backlights of different color gamuts excite different color gamut spectra to generate different color gamut pictures through the OC (Optics Component), giving customers different picture effects.

[0064] Please refer to Figure 4 , in the brightness information transmission process of this embodiment, the main board 31 sends the SPI signal (including the required brightness data) and the V-sync signal to the MCU 32. The MCU 32 resolves it into the data required by the backlight driving chip 33 according to the brightness calculation table, and then transmits it to each backlight driving chip 33 in the form of a daisy chain through the SPI signal. At the same time, the V-sync signal is transmitted to the backlight driving chip 33 to complete the transmission process of the brightness information for the zoning control function. The backlight driving chip 33 controls the MOS transistor to regulate the voltage and current of the backlight beads according to the received information, thereby controlling its brightness to achieve the effect of regional dimming. Among them, V-sync refers to the vertical synchronization pulse, which is loaded between two frames to indicate the end of the previous frame and the start of a new frame. Its function is to keep the refresh rates of the backlight driving board and the main board 31 (or OC) at a stable output picture quality.

[0065] Specifically, when the liquid crystal display needs to display a high color gamut mode, the backlight area behind the YAG lamp bead 111 is dimmed or turned off to achieve the effect that only the backlight excited by the KSF lamp bead 121 passes through the liquid crystal layer. When it is necessary to display a low color gamut, the backlight area behind the corresponding KSF lamp bead 121 is turned off, and the YAG lamp bead 111 is normally lit.

[0066] The utility model can be applied to the field of household sports equipment and the field of athlete simulation training equipment. By using the backlight module and the display provided by the embodiments of the utility model, and adopting lamp beads of two color gamuts, namely YAG lamp beads and KSF lamp beads, and connecting the lamp beads of the two color gamuts to different control circuits, the brightness of the two kinds of lamp beads can be independently controlled, so as to achieve the effect of displaying different color gamuts. It enables users to experience different color gamut effects on the same display, improves the visual experience of users, makes images, videos and other visual contents more vivid and lifelike, and enhances the immersion and enjoyment of the viewing content.

[0067] The above has introduced in detail a backlight module and a display provided by the utility model. For those of ordinary skill in the art, according to the idea of the embodiments of the utility model, there will be changes in the specific implementation manner and the application scope. In summary, the content of this specification should not be construed as a limitation on the utility model.

Claims

1. A backlight module, characterized in that, Including: An LED lamp bead array and a driving unit; The LED lamp bead array includes at least two color gamut level LED lamp beads; The LED lamp beads of different color gamut levels are alternately arranged along the first extension direction of the LED lamp bead array and alternately arranged along the second extension direction of the LED lamp bead array; The driving unit includes at least two control circuits; the control circuits are electrically connected to the LED lamp beads of different color gamut levels one by one.

2. The backlight module according to claim 1, characterized in that, The LED lamp bead array includes low color gamut LED lamp beads and high color gamut LED lamp beads; The driving unit includes a first control circuit and a second control circuit; the first control circuit is electrically connected to the low color gamut LED lamp beads; the second control circuit is electrically connected to the high color gamut LED lamp beads.

3. The backlight module according to claim 2, characterized in that The low color gamut LED lamp beads are YAG lamp beads; the YAG lamp beads are fixedly connected to the PCB board by solder paste; The YAG lamp beads include a bracket, an LED chip and encapsulating silica gel; the LED chip is arranged inside the bracket, fixedly connected to the bottom of the bracket by die bonding glue, and electrically connected to the PCB board by bonding wires; the encapsulating silica gel is filled inside the bracket, and YAG phosphor is mixed in the encapsulating silica gel.

4. The backlight module according to claim 2, wherein The high color gamut LED lamp beads are KSF lamp beads; the KSF lamp beads are fixedly connected to the PCB board by solder paste; The KSF lamp beads include a bracket, an LED chip and encapsulating silica gel; the LED chip is arranged inside the bracket, fixedly connected to the bottom of the bracket by die bonding glue, and electrically connected to the PCB board by bonding wires; the encapsulating silica gel is filled inside the bracket, and KSF phosphor is mixed in the encapsulating silica gel.

5. The backlight module according to claim 2, wherein, The LED lamp bead array includes at least two LED lamp strings; the LED lamp strings extend along a first direction and are arranged along a second direction; each LED lamp string includes at least one of the low color gamut LED lamp beads and at least one of the high color gamut LED lamp beads.

6. The backlight module according to claim 2, characterized in that, The driving unit includes a main board and a backlight driving board; the backlight driving board is provided with an MCU, at least two first backlight driving chips, at least two second backlight driving chips, at least two first control units and at least two second control units; The main board is electrically connected to the MCU, the MCU is electrically connected to the first backlight driving chip, the first backlight driving chip is electrically connected to the first control unit, and the first control unit is electrically connected to the low color gamut LED lamp beads, forming the first control circuit; The main board is electrically connected to the MCU, the MCU is electrically connected to the second backlight driving chip, the second backlight driving chip is electrically connected to the second control unit, and the second control unit is electrically connected to the high color gamut LED lamp beads, forming the second control circuit.

7. The backlight module according to claim 6, wherein The main board is electrically connected to the MCU through an SPI data bus; The first backlight driving chip and the second backlight driving chip are connected to form a daisy chain structure; the MCU is electrically connected to the daisy chain structure through an SPI data bus.

8. The backlight module according to claim 6, characterized in that, The first control unit is a MOS transistor; The second control unit is a MOS transistor.

9. The backlight module according to claim 6, wherein The main board includes a SOC chip or an FPGA chip; The MCU is a single-chip microcomputer.

10. A display, characterized in that, It includes: The backlight module according to any one of claims 1 to 9.

11. The display according to claim 10, wherein, It further includes: A controller; The controller is wirelessly connected to the driving unit.

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