Backlight liquid crystal module and display device

Abstract

The invention relates to the technical field of backlight display, and particularly provides a backlight liquid crystal module and a display device.The backlight liquid crystal module comprises an upper polarized light sheet, a liquid crystal box, a TFT substrate, a lower polarized light sheet and an RGB three-color backlight module; the upper polarized light plate is used for adjusting the polarization direction of transmitted light; one end of the liquid crystal box is attached to the upper polarized light sheet; the liquid crystal box is used for accommodating liquid crystal molecules and adjusting the transmittance of light through an electric field; one end of the TFT substrate is attached to the other end of the liquid crystal box, and the TFT substrate is used for driving liquid crystal molecules to change arrangement; the lower polarizing film is attached to the other end of the TFT substrate, and the lower polarizing film is used for screening the polarization direction of the incident light and is matched with the upper polarizing film to adjust the light transmission; the RGB three-color backlight module is arranged below the lower polarized light plate, so that an RGB color filter film necessary for traditional liquid crystal display is omitted, the penetration rate of the liquid crystal panel is greatly improved, the brightness required by backlight can be greatly reduced under the same display effect, and the energy efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of backlight display, and particularly to a backlight liquid crystal module and a display device. Background Art

[0002] Liquid crystal displays have the advantages of being thin, light, low power consumption, wide viewing angle, etc., and have become the mainstream display technology in the fields of computer monitors, televisions, mobile phone screens, etc.

[0003] However, in the existing liquid crystal display structure, a liquid crystal panel is disposed above a white light LED light source, and the white light source is decomposed into different colors of each pixel through the liquid crystal switch and RGB color filter film of the liquid crystal panel, that is, only the R band energy of the backlight entering the R filter film lattice can penetrate out, only the G band energy of the backlight entering the G filter film lattice can penetrate out, and only the B band energy of the backlight entering the B filter film lattice can penetrate out. The light energy that cannot penetrate becomes heat. In this process, the brightness of the liquid crystal display structure is greatly lost. In order to maintain the display effect, the existing liquid crystal display structure can only increase the brightness of the white light LED light source, resulting in a greatly increased power consumption.

[0004] Therefore, there are defects and deficiencies in the prior art, which need to be further improved and developed. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the purpose of this application is to provide a backlight liquid crystal module and a display device, aiming to solve the problem of high power consumption of the existing liquid crystal display structure.

[0006] The technical solution adopted by this application to solve the technical problem is as follows: A backlight liquid crystal module, which includes: An upper polarizing plate, which is used to adjust the polarization direction of the transmitted light; A liquid crystal cell, one end of the liquid crystal cell is attached to the upper polarizing plate; the liquid crystal cell is used to accommodate liquid crystal molecules and adjust the light transmittance through an electric field; A TFT substrate, one end of the TFT substrate is attached to the other end of the liquid crystal cell, and the TFT substrate is used to drive the liquid crystal molecules to change their arrangement; A lower polarizing plate, the lower polarizing plate is attached to the other end of the TFT substrate, and the lower polarizing plate is used to screen the polarization direction of the incident light and cooperate with the upper polarizing plate to adjust the light transmittance; An RGB three-color backlight module, which is disposed below the lower polarizing plate, and the RGB three-color backlight module is used to provide backlight of red, green or blue.

[0007] Optionally, the RGB three-color backlight module includes: A circuit board, one side of the circuit board being a chip mounting surface; A plurality of dams, the plurality of dams being convexly provided on the chip mounting surface, and the chip mounting surface being evenly divided into two or more square light control zones by the dams; Wherein, light-emitting chip groups are provided on two or more of the light control zones, and the light-emitting chip groups are arranged in a square or loop shape on the chip mounting surface.

[0008] Optionally, the light-emitting chip group includes a red LED chip group, a green LED chip group, and a blue LED chip group; the red LED chips in the red LED chip group are connected in series and arranged in a loop shape on the chip mounting surface; the green LED chips in the green LED chip group are connected in series and arranged in a loop shape on the chip mounting surface; the blue LED chips in the blue LED chip group are connected in series and arranged in a square shape on the chip mounting surface; the number ratio of the red LED chips, the green LED chips, and the blue LED chips is 6:5:4; the circuits of the red LED chips, the green LED chips, and the blue LED chips are controlled separately.

[0009] Optionally, the loop distribution of the red LED chip group is nested outside the loop distribution of the green LED chip group, and the loop distribution of the green LED chip group is nested outside the square distribution of the blue LED chip group; and the voltages of the red LED chip group, the green LED chip group, and the blue LED chip group are all greater than or equal to 12V.

[0010] Optionally, a phosphor or fluorescent glue is coated on the light-emitting chip group; the light-emitting chip group is a blue LED chip group, and the blue LED chips in the blue LED chip group are connected in series; Or, the light-emitting chip group includes a blue LED chip group and a green LED chip group, the blue LED chips in the blue LED chip group are connected in series and arranged in a square shape on the chip mounting surface; the green LED chips in the green LED chip group are connected in series and arranged in a loop shape on the chip mounting surface; the loop distribution of the green LED chip group is nested outside the square distribution of the blue LED chip group.

[0011] Optionally, a transparent optical glue is poured on the light-emitting chip group, the thickness of the transparent optical glue being higher than the height of the light-emitting chip group and lower than the height of the dam; the cross-sectional width of the dam decreases in the direction away from the chip mounting surface.

[0012] Optionally, a plurality of luminance gray-scale pixel circuits are arranged on the TFT substrate at uniform intervals, and the luminance gray-scale pixel circuits are used to replace the original RGB sub-pixel circuits.

[0013] Optionally, three of the luminance gray-scale pixel circuits are combined into one pixel grid, and each pixel grid corresponds to a liquid crystal switch to control the transmission of RGB three-color backlight.

[0014] Optionally, the width of the black matrix between the pixel grids is reduced to reduce the light-shielding area and improve the aperture ratio and light transmittance of the liquid crystal panel.

[0015] Another technical solution adopted by this application to solve the technical problem is as follows: A display device includes the backlight liquid crystal module as described above.

[0016] Beneficial effects: This application provides a backlight liquid crystal module and a display device. By canceling the color filter film that is essential in traditional liquid crystal displays, the transmittance of the liquid crystal panel is greatly improved. The transmittance is increased by about 3 times, reaching 24%, effectively reducing the light energy loss caused by the absorption of the filter film. Thus, under the same display effect, the brightness required for the backlight can be greatly reduced, the energy efficiency can be improved, and the problem of high power consumption of the existing liquid crystal display structure is solved. Description of the drawings

[0017] Figure 1 is a cross-sectional view of the backlight liquid crystal module provided in this application; Figure 2 is a top view of the backlight liquid crystal module provided in this application; Figure 3 is a side view of the backlight liquid crystal module provided in this application; Figure 4 is a top view of an embodiment in which the light control partition in the backlight liquid crystal module provided in this application includes three groups of light-emitting chip groups; Figure 5 is a side view of a light control partition in the backlight liquid crystal module including three groups of light-emitting chip groups; Figure 6 is a top view of another embodiment in which the light control partition of the backlight liquid crystal module provided in this application includes three groups of light-emitting chip groups; Figure 7 is a schematic diagram of the three groups of light-emitting chip groups in the light control partition of the backlight liquid crystal module provided in this application being connected in series respectively (the direction in the drawing is the current direction); Figure 8 is a top view of an embodiment in which the light control partition in the middle of the backlight liquid crystal module provided in this application includes a group of light-emitting chip groups; Figure 9It is a top view of the TFT substrate of the backlight liquid crystal module in this application; Figure 10 It is a top view of the pixel lattice of the TFT substrate of the backlight liquid crystal module in this application.

[0018] Explanation of reference numerals: 10. Backlight liquid crystal module; 11. Upper polarizing plate; 12. Liquid crystal cell; 13. TFT substrate; 14. Lower polarizing plate; 15. RGB three-color backlight module; 131. Luminance gray-scale pixel circuit; 132. Pixel lattice; 151. Circuit substrate; 152. Dam; 1512. Light control partition; 1513. Light-emitting chip group; 1514. Red LED chip; 1515. Green LED chip; 1516. Blue LED chip; 1517. Transparent optical adhesive; 1518. Fluorescent adhesive. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of this application clearer and more explicit, the following further elaborates on this application by way of examples with reference to the accompanying drawings. It should be understood that the specific examples described herein are only used to explain this application and are not used to limit this application.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0021] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] In a conventional liquid crystal display module, a liquid crystal panel is disposed above a white light LED light source, and the white light source is decomposed into different colors for each pixel display through the liquid crystal switch and the RGB color filter film of the liquid crystal panel. Specifically, when the white light backlight enters the RGB color filter film, the light source entering the R filter film grid only allows the transmission of the R band energy, the light source entering the G filter film grid only allows the transmission of the G band energy, and the light source entering the B filter film grid only allows the transmission of the B band energy. The light energy that cannot be transmitted is converted into heat.

[0023] After the white light LED light source penetrates the lower polarizer of the liquid crystal panel, the brightness is only 50% remaining. When it penetrates the color filter film further, the brightness is further lost by 2 / 3, and the remaining brightness is about 50%×(1 - 2 / 3)≈16.7%. Subsequently, when the transmitted light passes through the upper polarizer, the brightness is lost by half again, leaving only about 8%. Finally, due to the further absorption of part of the brightness by components such as the TFT substrate 13, the liquid crystal layer, and the glass substrate, the final light transmittance of the entire liquid crystal display structure is only 3% - 8%. In order to maintain the display effect, the existing liquid crystal display structure can only increase the brightness of the white light LED light source, resulting in a significant increase in power consumption.

[0024] Please refer to Figures 1 to 8 For the first embodiment of the present application, a backlight liquid crystal module 10 is provided. Specifically, the backlight liquid crystal module 10 is preferably a MicroLED backlight liquid crystal module or a MiniLED backlight liquid crystal module. The backlight liquid crystal module 10 includes an upper polarizer 11, a liquid crystal cell 12, a TFT substrate 13, a lower polarizer 14, and an RGB three-color backlight module 15 arranged in sequence from top to bottom. The upper polarizer 11 is used to adjust the polarization direction of the transmitted light to ensure that the vibration directions of the light rays are consistent. The liquid crystal cell 12 is composed of upper and lower glass substrates and is filled with liquid crystal molecules inside, which is used to control the transmission or blocking of light. The TFT substrate 13 provides electrical signals for the liquid crystal molecules and controls the arrangement mode of the liquid crystal molecules. The lower polarizer 14 cooperates with the upper polarizer 11 to finally determine the transmission situation of the light. The RGB three-color backlight module 15 is located at the bottom and serves as a light source. The RGB three-color backlight module 15 is composed of a circuit board 151, a light control partition 1512, a light-emitting chip group 1513, a dam 152 structure, and a transparent optical adhesive 1517. Among them, the light-emitting chip group 1513 distributes red, green, and blue three-color LEDs in a ratio of 6:5:4 to optimize color performance. The dam 152 structure is used to prevent excessive light diffusion and improve brightness uniformity. The presence of the transparent optical adhesive 1517 can make the light spread more evenly and avoid the problem of uneven brightness.

[0025] The operating mode of the backlight liquid crystal module 10 is different from that of traditional liquid crystal display modules. The backlight liquid crystal module 10 adopts a time-division driving method, and the backlights of different colors are sequentially lit and modulated by the liquid crystal panel to form a complete color picture. First, the algorithm control board of the terminal system separates the order of the red color field R signal, the green color field G signal, and the blue color field B signal and outputs the signals at time intervals. Each color lasts for a time period and then cycles and switches. Specifically, one cycle of the red color field R signal, the green color field G signal, and the blue color field B signal is a working cycle for the TFT substrate 13, the liquid crystal cell 12, the upper polarizing plate 11, and the lower polarizing plate 14, and the mixed light forms a frame of picture. The light-emitting chip group 1513 on the circuit board 151 lights the corresponding color light sources in sequence according to the signals. For example, when the terminal system outputs a red signal, the backlight module only lights the red LED chip 1514, and then lights the green and blue LEDs in sequence. Since the switching speed is extremely fast, far exceeding the visual persistence limit of the human eye, the human eye will mix the RGB light sources into a complete color image, realizing smooth and natural color display.

[0026] In terms of light control, the light-emitting chip group 1513 of the backlight liquid crystal module 10 is divided into multiple independent light control zones 1512, and the brightness of each zone can be adjusted separately to achieve the local dimming function. This design not only improves the contrast of the picture, but also optimizes the HDR (high dynamic range) display effect, making the dark details richer and the bright parts more transparent. The dam 152 structure arranged around the light control zone 1512 can reduce the lateral diffusion of light, enhance the light utilization efficiency, and at the same time the transparent optical glue 1517 can further diffuse the light, making the brightness of the entire screen more uniform and avoiding the problem of uneven brightness and darkness.

[0027] The light emitted by the light-emitting chipset 1513 passes through the light control partition 1512 and then passes through the liquid crystal cell 12. The arrangement of the liquid crystal molecules changes under the action of the electrical signal provided by the TFT substrate 13. Different arrangement modes determine the transmission state of the light. When the liquid crystal molecules are in a specific arrangement, the light can pass through the upper and lower polarizing plates 14 smoothly, forming a bright pixel area; when the arrangement of the liquid crystal molecules changes, the light is blocked and the corresponding pixel area becomes dark. The dynamic adjustment of the arrangement of the liquid crystal molecules, combined with the time-division light emission of the light-emitting chipset 1513, enables a complete and rich color picture to be finally presented. Furthermore, compared with the traditional LCD liquid crystal display screen, the backlight liquid crystal module 10 cancels the color filter film and adopts the RGB time-division driving method, enabling each pixel point to independently display complete RGB information. Since a pixel point is no longer divided into multiple sub-pixels, the effective resolution of the liquid crystal screen is increased by three times, and the picture is clearer and more delicate. In addition, the spectral peak of the chips in the light-emitting chipset 1513 is narrow, the color is more pure, and the color gamut is wider, ensuring the accuracy and consistency of the color. Finally, through the adjustment of the upper polarizing plate 11 and the lower polarizing plate 14, the entire backlight liquid crystal module 10 presents a high-brightness and high-contrast display effect.

[0028] Please refer to Figure 1 In some embodiments, a backlight liquid crystal module 10 includes: an upper polarizing plate 11, a liquid crystal cell 12, a TFT substrate 13, a lower polarizing plate 14, and an RGB three-color backlight module 15; the upper polarizing plate 11 is used to adjust the polarization direction of the transmitted light; one end of the liquid crystal cell 12 is attached to the upper polarizing plate 11; the liquid crystal cell 12 is used to accommodate liquid crystal molecules and adjust the light transmittance through an electric field; one end of the TFT substrate 13 is attached to the other end of the liquid crystal cell 12, and the TFT substrate 13 is used to drive the liquid crystal molecules to change their arrangement; the lower polarizing plate is attached to the other end of the TFT substrate 13, and the lower polarizing plate 14 is used to screen the polarization direction of the incident light and cooperate with the upper polarizing plate 11 to adjust the light transmittance; the RGB three-color backlight module 15 is disposed below the lower polarizing plate 14, and the RGB three-color backlight module 15 is used to provide red, green, or blue backlight, thereby greatly increasing the transmittance of the liquid crystal panel by canceling the color filter film that is necessary in traditional liquid crystal displays. Specifically, the transmittance is increased by about 3 times to reach 24%, effectively reducing the light energy loss caused by the absorption of the filter film. Thus, the brightness required for the backlight can be greatly reduced under the same display effect, improving the energy efficiency and solving the problem of high power consumption of the existing liquid crystal display structure.

[0029] Please refer to Figures 2 to 6In some embodiments, the backlight liquid crystal module 10 includes a circuit substrate 151 and a dam 152, wherein one side of the circuit substrate 151 is a chip mounting surface, and the dam 152 is disposed on the chip mounting surface and evenly divides a plurality of square light control partitions 1512. A light-emitting chipset group 1513 is disposed in each light control partition 1512, and the light-emitting chipset group 1513 is distributed in a square or circular shape and can form a uniform square light spot. The square light spots of adjacent light control partitions 1512 are separated by the dam 152, thereby reducing the halo phenomenon and further improving the display quality of the backlight liquid crystal module 10. In addition, the light-emitting chipset group 1513 can be directly controlled by passing current and voltage, without the need for additional optimization algorithms, so the cost is low, and the picture details under the grayscale signal are not sacrificed.

[0030] Specifically, each light control partition 1512 corresponds to an RGB LED light board, which is composed of one or more red LED chipsets, one or more green LED chipsets, and one or more blue LED chipsets. Each group of three-color LEDs serves as a light-emitting unit of a light control partition 1512. The RGB circuits of each light control partition 1512 can be independently controlled, and multiple light control partitions 1512 are distributed on the light board in an array manner. Among them, the algorithm board outputs R signals, G signals, and B signals to the LCD panel and the backlight board in each frame of the picture in a time-sharing manner. The light board controls the current of the red LED chipset, green LED chipset, and blue LED chipset of each partition in chronological order, and the LCD panel works periodically synchronously. Since the light board has a built-in algorithm to control grayscale and color matching, the TFT of the LCD panel calculates the color control weights of the LCD panel and the light board according to the algorithm curve, thereby further refining the color and brightness data of each pixel, making the restoration of the picture details more delicate and realistic.

[0031] Compared with other technical solutions, the three RGB semiconductor chips used in the backlight liquid crystal module 10 have narrower red, green and blue emission spectrum half-widths, so the three vertices of the color gamut triangle can be pulled further apart, making the color gamut coverage area larger, which is superior to all existing display technologies. In addition, since the emission spectrum characteristic shapes of the three colors are basically the same, the deviation of the color coordinates in different grayscale states is small, so that high color accuracy and stability can be maintained under various picture conditions.

[0032] Please refer to Figures 2 to 6, in some embodiments, the light-emitting chip group 1513 includes a red LED chip group, a green LED chip group, and a blue LED chip group; the red LED chips 1514 in the red LED chip group are connected in series and are arranged in a meandering distribution on the chip mounting surface; the green LED chips 1515 in the green LED chip group are connected in series and are arranged in a meandering distribution on the chip mounting surface; the blue LED chips 1516 in the blue LED chip group are connected in series and are arranged in a square distribution on the chip mounting surface; the quantity ratio of the red LED chips 1514, the green LED chips 1515, and the blue LED chips 1516 is 6:5:4, and the circuits of the red LED chips 1514, the green LED chips 1515, and the blue LED chips 1516 are controlled separately. Specifically, the circuits of the green LED chips 1515, the red LED chips 1514, and the blue LED chips 1516 are independent of each other, and the effect of separate control can be achieved.

[0033] Red, green, and blue are the primary colors. The light-emitting chip group 1513 has three groups, namely, a red LED chip group composed of multiple red LED chips 1514 connected in series, a green LED chip group composed of multiple green LED chips 1515 connected in series, and a blue LED chip group composed of multiple blue LED chips 1516 connected in series. By adjusting the light intensities of red, green, and blue and their mutual ratios, different colors can be mixed and displayed. Moreover, the red LED chip group, the green LED chip group, and the blue LED chip group are all connected in series internally and are independent of each other. By adjusting the input current and input voltage of the red LED chip group, the green LED chip group, and the blue LED chip group, the light intensities of red, green, and blue can be adjusted respectively, and then the mutual ratios of red light, green light, and blue light can be adjusted for mixing, which improves the control accuracy of the mixed picture in the control zone and can accurately display the required picture color and improve the picture quality.

[0034] Before the red LED chip group composed of multiple red LED chips 1514 connected in series, the green LED chip group composed of multiple green LED chips 1515 connected in series, and the blue LED chip group composed of multiple blue LED chips 1516 connected in series in the three light-emitting chip groups 1513 are not arranged on the chip mounting surface, the operation of arranging them in the light control zone 1512 is specifically to arrange the series-connected red LED chip group, green LED chip group, and blue LED chip group in a meandering or square distribution on the light control zone 1512.

[0035] Further, the quantity ratio of the red LED chips 1514, green LED chips 1515, and blue LED chips 1516 is 6:5:4, mainly selected according to the characteristics of the lamp cores of different colors. The working voltage of the existing red LED chips 1514 is usually 1.8 - 2.2V, the working voltage of the green LED chips 1515 is usually 2.0V - 3.0V, and the working voltage of the blue LED chips 1516 is usually 3.0 - 3.6V; such a quantity ratio can make the overall voltages of the red LED chip group, green LED chip group, and blue LED chip group approximately the same.

[0036] Among them, the overall voltage of six series-connected red LED chips 1514, the overall voltage of five series-connected green LED chips 1515, and the overall voltage of four series-connected blue LED chips 1516 are similar, which can ensure that the entire light control partition 1512 is connected to lamp cores of different colors with a similar voltage, so that the luminous intensity, brightness, etc. of the lamp cores are uniform, reducing the color difference between different colors, and ensuring the stable working state of the entire light control partition 1512 and the stable heating state of each lamp core, improving the overall stability and reliability.

[0037] Specifically, the minimum number of lamp cores contained in the light-emitting chip group 1513 is fifteen, namely six red LED chips 1514, five green LED chips 1515, and four blue LED chips 1516; specifically, the number of lamp cores in the light-emitting chip group 1513 can also be a positive integer multiple of fifteen, while meeting the requirement of the quantity ratio of 6:5:4 for the red LED chips 1514, green LED chips 1515, and blue LED chips 1516.

[0038] Further, the voltage difference between the overall voltage of the red LED chip group, the overall voltage of the green LED chip group, and the overall voltage of the blue LED chip group is less than or equal to 2.0V; that is, the voltage difference among the overall voltage of the series-connected red LED chips 1514, the overall voltage of the series-connected green LED chips 1515, and the overall voltage of the series-connected blue LED chips 1516 is less than or equal to 2.0V. Through the setting of the voltage difference, it is ensured that the voltages applied to the red LED chip group, green LED chip group, and blue LED chip group are similar, making the luminous intensity, brightness, etc. of the lamp cores of different colors uniform, reducing the color difference between different colors, and ensuring the stable working state of the entire light control partition 1512 and the stable heating state of each lamp core, improving the overall stability and reliability. More preferably, the voltage difference between the red LED chip group, green LED chip group, and blue LED chip group is less than or equal to 1.0V.

[0039] Please refer to Figures 4 to 6, in some embodiments, the loop distribution of the red LED chip group is nested outside the loop distribution of the green LED chip group, and the loop distribution of the green LED chip group is nested outside the square distribution of the blue LED chip group; that is, the loop distribution of the red LED chips 1514 is nested outside the loop distribution of the green LED chips 1515, and the loop distribution of the green LED chips 1515 is nested outside the square distribution of the blue LED chips 1516. Moreover, the voltages of the red LED chip group, the green LED chip group, and the blue LED chip group are all greater than or equal to 12V; that is, the total voltage of the red LED chips 1514, the total voltage of the green LED chips 1515, and the total voltage of the blue LED chips 1516 are all greater than or equal to 12V.

[0040] The loop distribution of the red LED chips 1514, the loop distribution of the green LED chips 1515, and the square distribution of the blue LED chips 1516 can be nested in equal proportion, making the overall shape symmetrical, achieving a progressive layering of each color, and thus a uniform mixing effect; the loop distribution of the red LED chips 1514, the loop distribution of the green LED chips 1515, and the square distribution of the blue LED chips 1516 can also have a certain angle, preferably less than 30 degrees, which can increase the overlap degree of the distribution areas of the lamp cores of each color, thereby improving the mixing degree of the emitted light, reducing the local strength difference, making the light more uniform, and weakening the halo effect.

[0041] It can ensure that the light-emitting control partition 1512 emits light with sufficient intensity and brightness, and at the same time ensure that the lamp cores can stably emit light, thereby reducing the phenomenon of large local temperature difference caused by unstable lamp cores, reducing power loss, and improving the overall energy efficiency and stability. Specifically, the currents of the three colors can be controlled and adjusted separately. Under the low-current conditions of low-gray-scale images, the color accuracy can be accurately controlled, and the light-emitting control of the partition and the display image quality effect can be effectively improved.

[0042] Combined with reference Figures 4 to 6, in some embodiments, the distribution patterns formed by the LED chips of the red LED chip group, the green LED chip group, and the blue LED chip group are preferably nested with each other, so as to ensure that red, green, and blue can be evenly mixed and reduce color difference; specifically, the spiral distribution formed by the red LED chips 1514 nests the spiral distribution formed by the green LED chips 1515, and the spiral distribution formed by the green LED chips 1515 nests the square distribution formed by the blue LED chips 1516, ensuring that the light emitted by the square blue LED chips 1516 nested inside can be mixed with the light emitted by the diverging spiral red LED chips 1514 from both the inside and the outside, and can be mixed with the light emitted by the diverging spiral green LED chips 1515 from both the inside and the outside, improving the mixing uniformity between different colors.

[0043] Please refer to Figures 3 to 6 , in some embodiments, a phosphor or a phosphor glue 1518 is coated on the light-emitting chip group 1513; the light-emitting chip group 1513 is a blue LED chip group, and the blue LED chips 1516 in the blue LED chip group are connected in series; alternatively, the light-emitting chip group 1513 includes a blue LED chip group and a green LED chip group, the blue LED chips 1516 in the blue LED chip group are connected in series and are arranged in a square distribution on the chip mounting surface; the green LED chips 1515 in the green LED chip group are connected in series and are arranged in a spiral distribution on the chip mounting surface; the spiral distribution of the green LED chip group nests outside the square distribution of the blue LED chip group.

[0044] The light-emitting chip group 1513 can be a fluorescent group, that is, the light-emitting chip group 1513 can be a homogeneous blue LED chip group, and a phosphor or a phosphor glue 1518 is coated on the blue LED chip group; the light-emitting chip group 1513 can also be a combination of a blue LED chip group and a green chip group, and a phosphor or a phosphor glue 1518 is coated on both the blue LED chip group and the green chip group.

[0045] When the light-emitting chip group 1513 is a combination of a blue LED chip group and a green chip group, the blue LED chips 1516 in the blue LED chip group are connected in series and are arranged in a square distribution on the chip mounting surface; the green LED chips 1515 in the green LED chip group are connected in series and are arranged in a meandering distribution on the chip mounting surface; the meandering distribution of the green LED chip group is nested outside the square distribution of the blue LED chip group; in addition, the number ratio of the blue LED chips 1516 to the green LED chips 1515 is preferably 4:5. The color of the emitted mixed light can be adjusted by mixing blue light and green light, and under the action of the phosphor or fluorescent glue 1518, white light or light of a specific color can be output; at the same time, the nested meandering distribution setting can make the blue light and green light mix evenly, ensuring the stability and light efficiency of the light.

[0046] The same-color blue LED chips 1516 can be arranged in the light control partition 1512 to emit single blue light, and then the phosphor in the phosphor or fluorescent glue 1518 is used to convert the light emitted by the monochromatic light into light of different colors to achieve the output of white light or light of a specific color. The blue LED chip group and the green LED chip group connected in series can also be arranged in the light control partition 1512 to emit blue light and green light respectively, and then the phosphor in the phosphor or fluorescent glue 1518 is used to convert the emitted light into light of different colors to achieve the output of white light or light of a specific color. Further, when the phosphor is coated on the light-emitting chip group 1513, the thickness of the phosphor is 50-300 μm; when the fluorescent glue 1518 is coated on the light-emitting chip group 1513, the thickness of the fluorescent glue 1518 is 0.15-0.40 mm.

[0047] The phosphor can directly absorb light and be converted into light of other colors; in order to improve the color uniformity, the thickness of the phosphor is preferably 80-150 μm; the type and particle size of the phosphor can be selected according to actual needs. In order to emit different colors, multiple phosphors can be mixed in the required proportion and coated on the wick. The phosphor can be coated with encapsulation glue at the same time to bond the phosphor to the wick. The encapsulation glue can be a transparent optical glue 1517, which can protect the wick while fixing the phosphor; specifically, the thickness of the transparent optical glue 1517 is greater than the thickness of the wick, which can immerse the wick and play a better protection role. At the same time, the phosphor in the phosphor or fluorescent glue 1518 is preferably evenly distributed beside the wick instead of completely covering the wick, preventing the light emitted by the wick from being completely covered, resulting in poor absorption and conversion effects of the phosphor.

[0048] The fluorescent glue 1518 is a glue containing phosphor, which can be common commercially available products such as Mini LED fluorescent thin film glue or Mini LED fluorescent film UV glue. Specifically, a layer of glue containing phosphor is evenly coated on the wick. After absorbing the light emitted by the wick, the phosphor is excited and mixed with the light emitted by the wick to display different colors.

[0049] The color of the phosphor in the fluorescent glue 1518 can be selected according to the color of the wick and the desired emitted color, or it can be a phosphor mixed with multiple colors in the required proportion. The thickness of the fluorescent glue 1518 is preferably 0.15 - 0.40 mm, which can ensure that sufficient phosphor is coated on the LED chips of the same color. And the glue therein not only plays an adhesive role but also has a certain protective effect, which can prevent the wick from being damaged by the outside world. The glue in the fluorescent glue 1518 is transparent to facilitate the excitation of the phosphor, the reflection of light, and the emission of light.

[0050] In some embodiments, an electrode pad is provided at the bottom of the light-emitting chip group 1513, and the light-emitting chip group 1513 is disposed on the chip mounting surface through the electrode pad; or, the light-emitting chip group 1513 is directly connected to the chip mounting surface.

[0051] Specifically, a single light-emitting chip group 1513 can be packaged by MIP (Micro LED in Package). After packaging the light-emitting chip group 1513 and the electrode pad at the bottom, it is then arranged on the chip mounting surface for overall packaging, so that the composed backlight liquid crystal module 10 can independently drive the light-emitting chip groups 1513 of different light control zones 1512, improving the light control effect and being overall miniaturized, and can be applicable to miniature, ultra-thin, and lightweight devices such as micro projectors and AR glasses. Or, the light-emitting chip group 1513 can be directly arranged on the chip mounting surface by COB (Chip on Board). Specifically, the light-emitting chip group 1513 can be directly soldered on the chip mounting surface. The backlight liquid crystal module 10 obtained through overall packaging can simplify the preparation process of the backlight liquid crystal module 10 and can uniform the light spot and improve the light efficiency.

[0052] The electrode of the light-emitting chip group 1513 can be led out from the side of the circuit board 151 away from the chip mounting surface and connected to an external power supply through the electrode, so as to supply power to the light-emitting chip group 1513.

[0053] Combined with reference Figure 7, when the light-emitting chip group 1513 of a single light control partition 1512 is set as a group of the same-color LED chips plus the phosphor glue 1518, specifically, when the light-emitting chip group 1513 only includes the blue LED chip group, four series-connected blue LED chips 1516 are distributed in a square shape in the light control partition 1512, and the distance between adjacent blue LED chips 1516 is equal to ensure uniform emitted light.

[0054] Combined with reference Figure 2 , in some embodiments, a transparent optical glue 1517 is poured on the light-emitting chip group 1513, and the thickness of the transparent optical glue 1517 is higher than the height of the light-emitting chip group 1513 and lower than the height of the dam 152. The function of the transparent optical glue 1517 is to separate the lamp core from the outside world, thereby protecting the lamp core. The thickness of the transparent optical glue 1517 is higher than the height of the light-emitting chip group 1513 and lower than the height of the dam 152, which can ensure that the lamp core is completely immersed in the transparent optical glue 1517 and reduce the cost by reducing the amount of the transparent optical glue 1517 used. The transparent optical glue 1517 is also an optical clear adhesive (OCA), and the optical clear adhesive can be made of resin or silica gel, which can play a good role in protecting the lamp core.

[0055] Combined with reference Figure 2 , in some embodiments, the cross-sectional width of the dam 152 decreases in the direction away from the chip mounting surface. The function of the dam 152 is to reflect the light source emitted by the square light-emitting chip group 1513 and the light of large-angle stray light on the dam 152, reflect the stray light to the area above the circuit board 151, reduce the loss of stray light, and form a uniform square light spot emitted upward, improving the light concentration of each light control partition 1512; at the same time, reduce the radiation energy that the light control partition 1512 penetrates into the adjacent light control partition 1512, thereby reducing the occurrence of light crosstalk phenomenon and weakening the halo phenomenon.

[0056] The cross-sectional width of the dam 152 decreases in the direction away from the chip mounting surface, which can facilitate the reflection of stray light to the area above the circuit board 151 to form a uniform square light spot emitted upward; in addition, the cross-sectional width of the dam 152 decreases in the direction away from the chip mounting surface, which is easier to implement in terms of technology. The dam 152 only needs to be processed by a simple dispensing process to easily form a peak-shaped structure with a large bottom surface and a small top surface, meeting the requirement that the cross-sectional width decreases in the direction away from the chip mounting surface and reducing the processing difficulty.

[0057] Combined with reference Figure 9, in some embodiments, a number of brightness gray-scale pixel circuits 131 arranged at uniform intervals are provided on the TFT substrate 13, and the brightness gray-scale pixel circuit 131 is used to replace the original RGB sub-pixel circuit. Specifically, in a conventional display scheme, a pixel usually consists of three RGB sub-pixels on the panel structure. The white backlight source passes through the TFT substrate 13, liquid crystal switches, and RGB color filter films of the liquid crystal panel to decompose the white light source into different colors of each pixel for display. In this application, after canceling the color filter film and combining with the RGB three-color backlight, the liquid crystal panel does not need to set three grids to separately control the mixing of RGB three colors. Instead, a time-for-space mode is adopted, so that the three brightness gray-scale pixel circuits 131 can process the R signal, G signal, and B signal in sequence. This means that the pixel grids 132 of the liquid crystal panel no longer need sub-pixels, but each grid directly serves as a complete pixel. Based on the existing liquid crystal panel structure, the resolution can be increased to three times the original.

[0058] Furthermore, the brightness gray-scale pixel circuits 131 uniformly arranged at intervals on the TFT substrate 13 completely replace the traditional RGB sub-pixel circuit. Due to the cancellation of the traditional RGB sub-pixel design, each pixel does not need to be decomposed into three sub-pixels anymore, but directly uses a unified gray-scale circuit for brightness control. This change not only improves the light transmittance of the liquid crystal panel, but also enables the display resolution to be increased under the same area, while reducing power consumption and improving display details and picture brightness.

[0059] Combined with reference Figure 10 , in some embodiments, the three brightness gray-scale pixel circuits 131 are combined into one pixel grid 132, and each pixel grid 132 corresponds to a liquid crystal switch to control the transmission of RGB three-color backlight. Specifically, the TFT substrate 13 combines the three RGB sub-pixel grids 132 in the existing TFT substrate 13 circuit into one pixel grid 132, and then combines the original three brightness gray-scale pixel circuits 131 into the same pixel grid 132. On this basis, each pixel grid 132 corresponds to a liquid crystal switch, which is used to accurately control the transmission of RGB three-color backlight. This greatly simplifies the control logic at the pixel level, is beneficial to accurately regulating the light transmittance of each pixel, and thus further optimizes the energy use while ensuring the display effect, and improves the overall energy efficiency ratio of the backlight liquid crystal module 10.

[0060] Combined with reference Figure 10, in some embodiments, the width of the black matrix between the pixel grids 132 is reduced to reduce the light-shielding area, improve the aperture ratio and light transmittance of the liquid crystal panel. Furthermore, by reducing the width of the black matrix, the light-shielding area is reduced. This not only increases the aperture ratio of the liquid crystal panel and improves the overall light transmittance, but also reduces the energy consumption loss caused by light shielding, further strengthening the low-power consumption advantage of the display module.

[0061] The second embodiment of the present application provides a display device, which includes the backlight liquid crystal module as described above. Furthermore, it solves the problem of high power consumption caused by the color filter film in the existing liquid crystal display technology, and also realizes the display effects of high resolution, high brightness, accurate color and low energy consumption through optimizing the backlight structure, LED chip layout, optical glue perfusion and pixel circuit design. Specifically, the display device includes, but is not limited to, ultra-high definition televisions, LED displays, monitors, laptop computers, mobile phones, tablet computers, etc.

[0062] In summary, the present application provides a backlight liquid crystal module and a display device. The backlight liquid crystal module includes: an upper polarizing plate, a liquid crystal cell, a TFT substrate, a lower polarizing plate and an RGB three-color backlight module; the upper polarizing plate is used to adjust the polarization direction of the transmitted light; one end of the liquid crystal cell is attached to the upper polarizing plate; the liquid crystal cell is used to accommodate liquid crystal molecules and adjust the light transmittance through an electric field; one end of the TFT substrate is attached to the other end of the liquid crystal cell, and the TFT substrate is used to drive the liquid crystal molecules to change their arrangement; the lower polarizing plate is attached to the other end of the TFT substrate, and the lower polarizing plate is used to screen the polarization direction of the incident light and cooperate with the upper polarizing plate to adjust the light transmittance; the RGB three-color backlight module is arranged below the lower polarizing plate, and the RGB three-color backlight module is used to provide red, green or blue backlight. Furthermore, by canceling the color filter film necessary in the traditional liquid crystal display, the transmittance of the liquid crystal panel is greatly improved. Specifically, the transmittance is increased by about 3 times to reach 24%, effectively reducing the light energy loss caused by the absorption of the RGB color filter film. Thus, the brightness required for the backlight can be greatly reduced under the same display effect, improving the energy efficiency and solving the problem of high power consumption in the existing liquid crystal display structure.

[0063] It should be understood that the application of the present application is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all these improvements and transformations should fall within the protection scope of the appended claims of the present application.

Claims

1. A backlight liquid crystal module, characterized in that, The backlight liquid crystal module includes: An upper polarizing plate, which is used to adjust the polarization direction of transmitted light; A liquid crystal cell, one end of the liquid crystal cell is attached to the upper polarizing plate; the liquid crystal cell is used to accommodate liquid crystal molecules and adjust the light transmittance through an electric field; A TFT substrate, one end of the TFT substrate is attached to the other end of the liquid crystal cell, and the TFT substrate is used to drive the liquid crystal molecules to change their arrangement; A lower polarizing plate, the lower polarizing plate is attached to the other end of the TFT substrate, and the lower polarizing plate is used to screen the polarization direction of incident light and cooperate with the upper polarizing plate to adjust the light transmittance; An RGB three-color backlight module, the RGB three-color backlight module is arranged below the lower polarizing plate, and the RGB three-color backlight module is used to provide backlight of red, green or blue.

2. The backlight liquid crystal module according to claim 1, wherein The RGB three-color backlight module includes: A circuit board, one side of the circuit board is a chip mounting surface; A plurality of dams, the plurality of dams are all protrudingly arranged on the chip mounting surface, and the chip mounting surface is evenly divided into two or more square light control partitions by the dams; Among them, a light-emitting chip group is provided on each of the two or more light control partitions, and the light-emitting chip group is arranged in a square or loop shape on the chip mounting surface.

3. The backlight liquid crystal module according to claim 2, characterized in that, The light-emitting chip group includes a red LED chip group, a green LED chip group and a blue LED chip group; the red LED chips in the red LED chip group are connected in series and are arranged in a loop shape on the chip mounting surface; the green LED chips in the green LED chip group are connected in series and are arranged in a loop shape on the chip mounting surface; the blue LED chips in the blue LED chip group are connected in series and are arranged in a square shape on the chip mounting surface; the number ratio of the red LED chips, the green LED chips and the blue LED chips is 6:5:4, and the circuits of the red LED chips, the green LED chips and the blue LED chips are controlled separately.

4. The backlight liquid crystal module according to claim 3, characterized in that, The loop distribution of the red LED chip group is nested outside the loop distribution of the green LED chip group, and the loop distribution of the green LED chip group is nested outside the square distribution of the blue LED chip group; and the voltages of the red LED chip group, the green LED chip group and the blue LED chip group are all greater than or equal to 12V.

5. The backlight liquid crystal module according to claim 4, wherein The light-emitting chip group is coated with phosphor or fluorescent glue; the light-emitting chip group is a blue LED chip group, and the blue LED chips in the blue LED chip group are connected in series; Alternatively, the light-emitting chip set includes a blue LED chip set and a green LED chip set. The blue LED chips in the blue LED chip set are connected in series and are arranged in a square distribution on the chip mounting surface; the green LED chips in the green LED chip set are connected in series and are arranged in a meandering distribution on the chip mounting surface; the meandering distribution of the green LED chip set is nested outside the square distribution of the blue LED chip set.

6. The backlight liquid crystal module according to claim 3, characterized in that The light-emitting chip set is poured with transparent optical glue, and the thickness of the transparent optical glue is higher than the height of the light-emitting chip set and lower than the height of the dam; the cross-sectional width of the dam decreases in the direction away from the chip mounting surface.

7. The backlight liquid crystal module according to claim 1, wherein A number of brightness gray-scale pixel circuits are uniformly spaced on the TFT substrate, and the brightness gray-scale pixel circuits are used to replace the original RGB sub-pixel circuits.

8. The backlight liquid crystal module according to claim 7, wherein Three of the brightness gray-scale pixel circuits are combined into one pixel lattice, and each pixel lattice corresponds to a liquid crystal switch to control the transmission of RGB three-color backlight.

9. The backlight liquid crystal module according to any one of claims 8, wherein, The width of the black matrix between the pixel lattices is reduced to reduce the light-shielding area and improve the aperture ratio and light transmittance of the liquid crystal panel.

10. A display device, characterized in that, The display device includes the backlight liquid crystal module according to any one of claims 1-9.

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