High-color-rendering TFT (Thin Film Transistor) liquid crystal display module

Abstract

The utility model relates to the technical field of display screens, in particular to a high-color-rendering TFT liquid crystal display module. According to the technical scheme, a liquid crystal screen is installed on a PCB, the liquid crystal screen is provided with a backlight module, a TFT array substrate is installed on the backlight module, a liquid crystal layer is installed on the TFT array substrate, and a color film substrate is installed on the liquid crystal layer; the backlight module is provided with a supporting back plate, a light source layer is arranged on the supporting back plate, the light source layer is a blue light LED, a fluorescence conversion layer is arranged on the light source layer, the light emitting face of the light source layer is covered with the fluorescence conversion layer, and a quantum dot film is arranged on the fluorescence conversion layer. According to the utility model, the blue light LED is matched with the fluorescence conversion layer and the quantum dot film which are specially and alternately stacked, so that the color gamut is widened, and the color rendering property is improved; through the unique liquid crystal layer, the color film substrate and the attaching technology, the color contrast and the image definition are enhanced, and the display performance is comprehensively optimized.

Description

Technical Field

[0001] This utility model relates to the field of display screen technology, specifically to a high color rendering TFT liquid crystal display module. Background Technology

[0002] As the performance requirements of displays in industries such as industry, medical care, and fire protection continue to increase, the market demand for TFT LCD displays is also growing. For example, in industrial sites such as mines and oilfield testing, there are equipment and integrated workstations, or in the medical device field, especially in situations where lighting is required, such as surgery and emergency rooms, there are high requirements for the contrast, resolution, and viewing angle of the display.

[0003] A search revealed that patent CN 222420739 U discloses an industrial semi-transmissive TFT LCD screen module comprising mounting components, protective components, and fixing screws. This module uses reflected light to make the semi-transmissive TFT screen appear brighter. While this device enhances screen brightness under direct sunlight and ensures image clarity in low-light conditions with the aid of a backlight layer, it suffers from limitations in color display. Color vibrancy and image clarity are subpar; the displayed image lacks clarity and brightness, resulting in motion blur when displaying dynamic images. Furthermore, contrast and color performance at different viewing angles are not ideal, indicating room for improvement in product stability and reliability. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a high color rendering TFT liquid crystal display module, solving the problems mentioned in the background art.

[0005] The solution to the above-mentioned technical problems provided by this utility model is as follows:

[0006] A high color rendering TFT liquid crystal display module includes a PCB board, on which an LCD screen is mounted.

[0007] One end of the PCB board is provided with a plug, a reading module is installed on the back of the PCB board, the LCD screen is provided with a backlight module, a TFT array substrate is installed on the backlight module, a liquid crystal layer is installed on the TFT array substrate, and a color filter substrate is installed on the liquid crystal layer.

[0008] The backlight module is provided with a support back plate, and a light source layer is provided on the support back plate. The light source layer is a blue LED. A fluorescence conversion layer is provided on the light source layer. The fluorescence conversion layer covers the light-emitting surface of the light source layer. The fluorescence conversion layer is composed of red fluoride phosphor layer and green aluminate phosphor layer arranged in an alternating stacked manner. A quantum dot film is provided on the fluorescence conversion layer.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, a polarizer is attached to the side of the color filter substrate facing away from the liquid crystal layer, and the surface of the polarizer is coated with a SiO2 / Nb2O5 asymmetric antireflection film.

[0011] The beneficial effects of adopting the above-mentioned further solutions are:

[0012] The SiO2 / Nb2O5 asymmetric antireflection film utilizes the principle of light interference. When light propagates between film layers with different refractive indices, the reflected light cancels each other out, significantly reducing reflection across the entire wavelength range. This allows more light to pass through the polarizer, effectively improving the screen's transmittance, resulting in clearer, brighter, and more vibrant images, greatly enhancing the visual experience. Simultaneously, reducing reflected light also minimizes ambient light interference with the screen display, ensuring good visibility under various lighting conditions.

[0013] Furthermore, the liquid crystal molecules in the liquid crystal layer have a 5° pretilt angle.

[0014] The beneficial effects of adopting the above-mentioned further solutions are:

[0015] A 5° pretilt angle optimizes the initial alignment of liquid crystal molecules, resulting in a faster response speed under an electric field. This means that when displaying dynamic images, it can effectively reduce ghosting and improve image smoothness. At the same time, the pretilt angle helps improve contrast and color performance at different viewing angles, allowing users to obtain a more consistent visual experience regardless of the viewing angle, expanding the viewing angle range and enhancing the applicability of the display module.

[0016] Furthermore, the color filter substrate includes an RGBW four-color filter unit, and the surface of the RGBW four-color filter unit is formed by nanoimprinting with a square or circular microlens array, and the unit aperture of the microlens array is 2-5μm and the radius of curvature is 1.2-1.8μm.

[0017] The beneficial effects of adopting the above-mentioned further solutions are:

[0018] The RGBW four-color filter unit adds a white sub-pixel to the traditional RGB foundation. This white sub-pixel enhances overall brightness through dynamic backlight adjustment, while the RGB sub-pixels selectively filter light based on the image signal, enhancing color contrast. The surface microlens array, with its unique optical structure, effectively focuses light, precisely guiding it to the corresponding pixel areas. Specific unit apertures and radii of curvature optimize light focusing, improving light utilization and further enhancing color vibrancy and image clarity, resulting in more vivid and lifelike displays.

[0019] Furthermore, the TFT array substrate, color filter substrate, and polarizer are bonded together by UV-curable elastic optical adhesive in a spiral and grid filling combination, and the UV-curable elastic optical adhesive is applied with a grid spacing of 0.5-1mm.

[0020] The beneficial effects of adopting the above-mentioned further solutions are:

[0021] This unique bonding method combines the advantages of spiral coating and grid filling. The spiral coating ensures uniform distribution of the optical adhesive during bonding, preventing issues like insufficient adhesive or uneven thickness. The grid filling enhances the bonding strength between components, ensuring a tight connection. The UV-cured elastic optical adhesive not only possesses excellent optical properties, significantly not affecting light propagation, but also exhibits elasticity, effectively buffering stress caused by temperature changes, external impacts, and other factors. A reasonable grid spacing (0.5-1mm) ensures bonding strength while reducing stress concentration, preventing display defects such as yellow spots, extending the lifespan of the display module, and improving product stability and reliability.

[0022] This invention provides a high color rendering TFT liquid crystal display module. It has the following advantages:

[0023] The color filter substrate includes RGBW four-color filter units, which add white sub-pixels to the traditional RGB base, improving brightness and color contrast, reducing light loss from the filter, and making colors more vivid and vibrant. Simultaneously, the surface of the RGBW four-color filter units is nano-imprinted with a microlens array of specific parameters, effectively focusing light, improving light utilization, and further optimizing color display effects.

[0024] The polarizer surface is coated with a SiO2 / Nb2O5 asymmetric antireflection film, which reduces light reflection and improves light transmittance, making the screen display clearer and brighter. The TFT array substrate, color filter substrate, and polarizer are bonded together using a combination of spiral and grid filling with UV-cured elastic optical adhesive, and the grid spacing has a specific range. This bonding method ensures a firm bond, reduces stress concentration, and avoids display defects. At the same time, the UV-cured elastic optical adhesive also has good optical properties, which helps to improve the overall display effect.

[0025] The backlight module uses blue LEDs as its light source layer, combined with a phosphor conversion layer consisting of alternating layers of red fluoride phosphor and green aluminate phosphor, as well as a quantum dot film. This combination can broaden the color gamut, improve color rendering, bypass traditional phosphor patents, and enhance color gamut and brightness uniformity through quantum dot technology, making the screen display colors richer and more natural.

[0026] The liquid crystal molecules in the liquid crystal layer have a 5° pretilt angle, which helps to optimize the alignment and response speed of the liquid crystal molecules, thereby improving the display effect. For example, it can maintain good contrast and color performance at different viewing angles. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0028] In the attached diagram:

[0029] Figure 1 This is a schematic diagram of the main appearance of the present utility model;

[0030] Figure 2 This is a bottom view of the present invention.

[0031] Figure 3 This is a schematic diagram of the LCD screen structure of this utility model;

[0032] Figure 4 This is a schematic diagram of the backlight module structure of this utility model.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. LCD screen; 101. Color filter substrate; 102. Liquid crystal layer; 103. TFT array substrate; 104. Backlight module; 1041. Quantum dot film; 1042. Phosphor conversion layer; 1043. Light source layer; 1044. Support backplate; 2. PCB board; 3. Connector; 4. Reading module. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figures 1 to 4 As shown, the embodiments provided by this utility model are as follows:

[0037] Example 1

[0038] A high color rendering TFT liquid crystal display module includes a PCB board 2, on which an LCD screen 1 is mounted. A connector 3 is located at one end of the PCB board 2, and a read module 4 is mounted on the back of the PCB board 2. The LCD screen 1 has a backlight module 104, on which a TFT array substrate 103 is mounted. A liquid crystal layer 102 is mounted on the TFT array substrate 103. The liquid crystal molecules in the liquid crystal layer 102 have a 5° pretilt angle. This 5° pretilt angle optimizes the initial alignment of the liquid crystal molecules, resulting in a faster response speed under an electric field. This means that when displaying dynamic images, it can effectively reduce ghosting and improve image smoothness. Meanwhile, the pre-tilt angle helps improve contrast and color performance from different viewing angles, allowing users to obtain a more consistent visual experience regardless of the viewing angle, expanding the viewing angle range and enhancing the applicability of the display module. A color filter substrate 101 is mounted on the liquid crystal layer 102. The color filter substrate 101 includes RGBW four-color filter units, and the surface of the RGBW four-color filter units is formed with square or circular microlens arrays through nano-imprinting. The unit aperture of the microlens array is 2-5μm, and the radius of curvature is 1.2-1.8μm. The RGBW four-color filter units add a white sub-pixel to the traditional RGB foundation. The white sub-pixel improves the overall brightness through dynamic backlight adjustment, while the RGB sub-pixels selectively filter light according to the image signal, enhancing color contrast. The surface microlens array, utilizing its special optical structure, can effectively concentrate light and precisely guide it to the corresponding pixel area. The specific unit aperture and radius of curvature optimize light focusing, improving light utilization and further enhancing color vibrancy and image clarity, resulting in a more vivid and realistic display. A polarizer is attached to the surface of the color filter substrate 101 opposite to the liquid crystal layer 102, and the surface of the polarizer is coated with a SiO2 / Nb2O5 asymmetric anti-reflection film. Utilizing the principle of light interference, the SiO2 / Nb2O5 asymmetric anti-reflection film cancels out reflected light when it propagates between layers with different refractive indices, significantly reducing reflection across the entire wavelength range. This allows more light to pass through the polarizer, effectively improving the screen's transmittance, making the display clearer, brighter, and more vibrant, greatly enhancing the visual experience. Meanwhile, reducing reflected light also minimizes interference from ambient light on the screen display, ensuring good visibility under various lighting conditions. The TFT array substrate 103, color filter substrate 101, and polarizer are bonded together using a combination of spiral and grid filling with UV-curable elastic optical adhesive. The UV-curable elastic optical adhesive is applied with a grid spacing of 0.5-1mm. This unique bonding method combines the advantages of spiral and grid filling. The spiral coating ensures uniform distribution of the optical adhesive during bonding, avoiding problems such as localized missing adhesive or uneven thickness; the grid filling enhances the bonding strength between components, ensuring a tight connection.UV-curable elastic optical adhesive not only possesses excellent optical properties, significantly impacting light propagation, but also exhibits elasticity, effectively buffering stress caused by temperature changes, external impacts, and other factors. A reasonable grid spacing (0.5-1mm) ensures bonding strength while reducing stress concentration, preventing display defects such as yellow spots, extending the lifespan of the display module, and improving product stability and reliability.

[0039] Example 2

[0040] To improve the purity of red and green light and further enhance the color performance of the backlight, for example, such as... Figures 1 to 4 As shown, the present invention also includes: a backlight module 104 having a supporting back plate 1044, a light source layer 1043 on the supporting back plate 1044, the light source layer 1043 being a blue LED, a fluorescence conversion layer 1042 on the light source layer 1043, the fluorescence conversion layer 1042 covering the light-emitting surface of the light source layer 1043, and the fluorescence conversion layer 1042 being composed of red fluoride phosphor layers and green aluminate phosphor layers arranged in an alternating stacked manner, and a quantum dot film 1041 on the fluorescence conversion layer 1042.

[0041] Working principle:

[0042] When the display module is powered on, the blue light chip in the backlight module 104 starts working and emits blue light. This is the basic light source for the entire display.

[0043] The emitted blue light irradiates the red KSF phosphor (K2SiF6:Mn). 4+ ) and green β-SiAlON:Eu 2+ A bifluorescent structure composed of phosphors. Blue light excites the phosphor, causing it to emit red and green light. The principle lies in the fact that electrons in the phosphor absorb the energy of blue light, transition to a higher energy level, and then release light of specific wavelengths when they transition back to a lower energy level, corresponding to red and green light respectively. Red KSF phosphor and green β-SiAlON:Eu 2+ Phosphors can broaden their color gamut by layering or mixing and exciting them.

[0044] The generated light continues to propagate to the integrated cadmium-free quantum dot film 1041 (such as InP-based quantum dots). When excited by light, the quantum dots emit purer red and green light. This is due to the size effect of quantum dots; quantum dots of different sizes can absorb and emit light of specific wavelengths. By precisely controlling the size of the quantum dots, the purity of the red and green light is improved, achieving an NTSC color gamut >110%, further enhancing the color performance of the backlight.

[0045] The mixed light, after fluorescence conversion and quantum dot enhancement, propagates uniformly toward the color filter substrate 101, providing sufficient light for subsequent image display.

[0046] The light emitted by the backlight module 104 reaches the color filter substrate 101. The color filter substrate 101 adopts an RGBW four-color pixel structure, adding a white sub-pixel to the traditional RGB structure.

[0047] Light enters each pixel, and the white sub-pixel enhances overall brightness through dynamic backlight adjustment; the RGB sub-pixels selectively filter different colors of light according to the input image signal. Because the color filter substrate 101 is made of a low-refractive-index resin (such as fluorinated polyimide), interface reflection is reduced, improving light efficiency.

[0048] By reducing the width of the TFT lines and the area of ​​the black matrix, the pixel aperture ratio is increased to over 85%, reducing the photoresist effect and allowing more light to pass through the pixels, thus improving the brightness and clarity of the image.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high color rendering TFT liquid crystal display module, comprising a PCB board (2), wherein a liquid crystal screen (1) is mounted on the PCB board (2), characterized in that: one end of the PCB board (2) is provided with a plug (3), the back surface of the PCB board (2) is mounted with a reading module (4), the liquid crystal screen (1) is provided with a backlight module (104), the backlight module (104) is mounted with a TFT array substrate (103), the TFT array substrate (103) is mounted with a liquid crystal layer (102), and the liquid crystal layer (102) is mounted with a color film substrate (101); the backlight module (104) is provided with a supporting back plate (1044), the supporting back plate (1044) is provided with a light source layer (1043), the light source layer (1043) is a blue light LED, the light source layer (1043) is provided with a fluorescent conversion layer (1042), the fluorescent conversion layer (1042) covers the light emitting surface of the light source layer (1043), and the fluorescent conversion layer (1042) is arranged in an alternating stacking manner by a red fluoride fluorescent powder layer and a green aluminates fluorescent powder layer, and the fluorescent conversion layer (1042) is provided with a quantum dot film (1041).

2. The high color TFT liquid crystal display module according to claim 1, wherein: A polaroid is attached to the surface of the color film substrate (101) away from the liquid crystal layer (102), and the surface of the polaroid is coated with a SiO2 / Nb2O5 asymmetric antireflection film.

3. The high color TFT liquid crystal display module of claim 1, wherein: The liquid crystal molecules of the liquid crystal layer (102) have a 5° pre-tilt angle.

4. The high color TFT liquid crystal display module of claim 1, wherein: The color film substrate (101) comprises RGBW four-color filter units, and the surface of the RGBW four-color filter units is formed with a square or circular microlens array by nano-imprinting, the unit aperture of the microlens array is 2-5 μm, and the curvature radius is 1.2-1.8 μm.

5. The high color TFT liquid crystal display module of claim 1, wherein: The TFT array substrate (103), the color film substrate (101) and the polaroid are attached by UV-cured elastic optical glue in a spiral line and grid filling combination, the UV-cured elastic optical glue is coated, and the grid spacing is 0.5-1 mm.

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