High-color-gamut full-color LED display screen of mobile phone

Abstract

The utility model is applicable to the technical field of liquid crystal display screen production, and provides a high-color-gamut full-color LED display screen of a mobile phone, which comprises an outer frame and a screen, the upper surface of the outer frame is fixedly connected with a substrate, the upper surface of the substrate is respectively and fixedly connected with a first LED lamp bead and a second LED lamp bead, the first LED lamp bead and the second LED lamp bead are uniformly distributed on the upper surface of the substrate, and the first LED lamp bead and the second LED lamp bead are fixedly connected with the screen. The lower surface of the screen is fixedly connected with a high-color-gamut quantum optical film, a light diffusion film is arranged below the high-color-gamut quantum optical film, the lower surface of the light diffusion film is fixedly connected with a bright enhancement film, LED lamp beads of various colors are adopted, the luminous intensity of LEDs of each color is independently controlled, a wider color gamut can be displayed, and the display effect is better. Finer color control is realized, and the color expressive force of the display screen is obviously improved; by arranging the quantum dot optical film on the screen, the LED light source can be converted into purer and more saturated colors.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile phone display, in particular to a high color gamut full-color LED display screen for a mobile phone. Background Art

[0002] With the rapid development of smart phones, consumers have higher and higher requirements for the performance of mobile phone displays. At present, the mainstream mobile phone display technologies include TFT-LCD (thin-film transistor liquid crystal display) and AMOLED (active matrix organic light-emitting diode display). Among them, TFT-LCD occupies a major share of the low-end and mid-range mobile phone market with its advantages of low cost, low power consumption and long life. AMOLED, on the other hand, is favored by high-end flagship mobile phones for its advantages of bright colors, high contrast and fast response speed.

[0003] However, traditional TFT-LCD and AMOLED displays still have certain limitations in color gamut coverage. Taking the iPhone 12 series as an example, the Super Retina XDR OLED display it uses has a color gamut coverage of 100% DCI-P3, but it still does not meet the wide color gamut standard of 100% NTSC. The reason is mainly due to the limitations of the luminescent properties of the display material itself. For LCD displays, the luminescent spectrum of the phosphor backlight used is wide, making it difficult to achieve the ideal three primary colors, and the color purity is not high. For OLED displays, although self-luminous organic materials are used, the color coordinate spacing of the three luminescent materials of red, green, and blue is still large, making it difficult to cover a wider color gamut.

[0004] In order to further improve the color gamut performance of the display, the industry has begun to explore the use of quantum dot technology. Quantum dots are a new type of nano-luminescent material with the advantages of high luminous efficiency, high color purity, and strong controllability. By applying quantum dot materials to the backlight or light-emitting layer of the display, more pure and saturated red, green, and blue primary colors can be obtained, thereby significantly broadening the color gamut coverage of the display. At present, many manufacturers have launched quantum dot-enhanced LCD displays and QLED (quantum dot light-emitting diode) displays, which have made breakthrough progress in color gamut performance.

[0005] Although quantum dot technology has brought new opportunities for improving the color gamut performance of display screens, there are still some technical challenges in practical applications. First, the stability and reliability of quantum dot materials need to be further improved. Quantum dots are easily affected by environmental factors such as humidity, temperature, ultraviolet rays, etc., causing aging and degradation, resulting in problems such as decreased luminous efficiency and color distortion. Secondly, the luminous efficiency and brightness of quantum dots need to be further improved. At present, the quantum yield of quantum dot materials is generally lower than that of traditional phosphors and organic light-emitting materials, and it is difficult to meet the needs of high-brightness display. Thirdly, the preparation process of quantum dots is relatively complex and costly, which is not conducive to large-scale commercial applications. Finally, the integration of quantum dot materials with traditional LCD or OLED displays requires optimization and innovation of the display structure and process to improve the rationality and manufacturability of the optical design.

[0006] In view of the above technical problems, there is an urgent need to provide a high color gamut full-color LED display for mobile phones. Utility Model Content

[0007] The utility model provides a high color gamut full-color LED display screen for a mobile phone, aiming to solve the problems of insufficient color gamut coverage and low color reproduction of existing mobile phone display screens, and to achieve wider color gamut display and more sophisticated color control.

[0008] A high color gamut full-color LED display screen for a mobile phone comprises an outer frame and a screen, wherein the upper surface of the outer frame is fixedly connected to a substrate, and the upper surfaces of the substrate are respectively fixedly connected to first LED lamp beads and second LED lamp beads, the first LED lamp beads and the second LED lamp beads are evenly distributed on the upper surface of the substrate, and the lower surface of the screen is fixedly connected to a high color gamut quantum optical film, a light diffusion film is arranged below the high color gamut quantum optical film, and a brightness enhancement film is fixedly connected to the lower surface of the light diffusion film.

[0009] As a further technical solution, the first LED lamp bead and the second LED lamp bead include a red LED, a green LED and a blue LED. By using LED lamp beads of multiple colors and independently controlling the luminous intensity of each color LED, a wider color gamut can be displayed. For example, the luminous wavelength of the red LED can cover 620-750nm, the luminous wavelength of the green LED can cover 495-570nm, and the luminous wavelength of the blue LED can cover 450-495nm. By accurately controlling the luminous intensity ratio of the three color LEDs, richer and more realistic colors can be restored.

[0010] As a further technical solution, the luminous intensity of the red LED, green LED and blue LED can be independently controlled. By independently adjusting the luminous intensity of each color LED, more sophisticated color control can be achieved. For example, a more vivid red can be displayed by increasing the luminous intensity of the red LED and reducing the luminous intensity of the green and blue LEDs. Similarly, any desired color can be displayed by adjusting the luminous intensity ratio of the three color LEDs.

[0011] As a further technical solution, a protective film is fixedly connected to the upper surface of the screen. The protective film can protect the screen and prevent scratches, while also reducing the reflection of external light and improving the clarity of the display screen. The protective film can be made of materials such as tempered glass or sapphire glass, and its thickness is generally 0.2-0.5mm.

[0012] As a further technical solution, a reflective film is fixedly connected to the upper surface of the substrate, and the reflective film is located between the first LED lamp bead and the second LED lamp bead. The reflective film can reflect the light emitted by the LED lamp bead onto the screen to improve the utilization efficiency of the light. At the same time, the reflective film can also isolate LED lamp beads of different colors to prevent the mixing of light of adjacent colors and affect the display effect. The reflective film can be made of materials such as silver coating or aluminum coating, and its thickness is generally 0.1-0.3mm.

[0013] As a further technical solution, a heat dissipation silicone sheet is bonded to the lower surface of the substrate. The heat dissipation silicone sheet can help the LED lamp beads dissipate heat and extend their service life. At the same time, good heat dissipation can also ensure the luminous efficiency and stability of the LED lamp beads. The heat dissipation silicone sheet can be made of a silicone material with a high thermal conductivity, and its thickness is generally 0.5-1mm.

[0014] As a further technical solution, the high color gamut quantum optical film is made of quantum dot material. Quantum dot material is a new type of optical material with excellent optical properties, which can convert the spectrum of LED light source into purer and more saturated colors. By setting a quantum dot optical film on the screen, the color gamut of the display screen can be further widened and the saturation and purity of the color can be improved. The thickness of the quantum dot optical film is generally 10-20μm.

[0015] As a further technical solution, the light diffusion film is a matte light diffusion film. The matte light diffusion film has countless tiny convex structures on its surface, which can diffuse the point light source emitted by the LED light source into a surface light source, thereby improving the brightness uniformity of the display screen. At the same time, the matte surface structure can also effectively reduce the loss of light and improve the optical utilization efficiency. The thickness of the matte light diffusion film is generally 50-100 μm.

[0016] As a further technical solution, the brightness enhancement film is a prism-type brightness enhancement film. The surface of the prism-type brightness enhancement film has a regular triangular prism structure, which can gather light in a specific direction, increase the transmitted radiation intensity of light, and thus increase the brightness of the display screen. At the same time, the prism structure can also reduce the propagation loss of light in the film, further improving the optical efficiency. The thickness of the prism-type brightness enhancement film is generally 50-200μm.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. By using LED lamp beads of multiple colors and independently controlling the luminous intensity of each color LED, a wider color gamut can be displayed, more refined color control can be achieved, and the color expression of the display can be significantly improved.

[0019] 2. By setting a quantum dot optical film on the screen, the LED light source can be converted into purer and more saturated colors, further broadening the color gamut of the display and improving the color restoration and vividness.

[0020] 3. By rationally designing optical structures such as reflective films, light diffusion films and brightness enhancement films, the utilization efficiency of LED light sources can be improved, the brightness uniformity of the display screen can be improved, and the clarity and color stability of the display screen can be guaranteed.

[0021] 4. By adopting efficient heat dissipation design, the luminous efficiency and service life of LED lamp beads can be guaranteed, and the reliability and stability of the display can be improved.

[0022] 5. The mobile phone display screen provided by the utility model has a simple structure and mature technology, is easy to mass produce and apply, can meet the needs of the high-end mobile phone market, and has a good market prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front cross-sectional structural schematic diagram of the utility model;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the substrate of the utility model;

[0025] In the figure: 1. outer frame; 2. substrate; 3. first LED lamp bead; 4. second LED lamp bead; 5. reflective film; 6. screen; 7. high color gamut quantum optical film; 8. light diffusion film; 9. brightness enhancement film; 10. protective film; 11. heat dissipation silicone sheet. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figure 1-2As shown, the utility model provides a high color gamut full-color LED display screen for a mobile phone, comprising an outer frame 1 and a screen 6, the upper surface of the outer frame 1 is fixedly connected with a substrate 2, and the upper surface of the substrate 2 is respectively fixedly connected with a first LED lamp bead 3 and a second LED lamp bead 4, the first LED lamp bead 3 and the second LED lamp bead 4 are evenly distributed on the upper surface of the substrate 2, and the lower surface of the screen 6 is fixedly connected with a high color gamut quantum optical film 7, a light diffusion film 8 is arranged below the high color gamut quantum optical film 7, and the lower surface of the light diffusion film 8 is fixedly connected with a brightness enhancement film 9.

[0028] Wherein, the first LED lamp bead 3 and the second LED lamp bead 4 include a red LED, a green LED and a blue LED, and the three colors of LED lamp beads are arranged alternately to form an RGB pixel unit. Each RGB pixel unit can display any desired color by controlling the luminous intensity of the three color LEDs. The luminous wavelength of the red LED is generally 620-750nm, the luminous wavelength of the green LED is generally 495-570nm, and the luminous wavelength of the blue LED is generally 450-495nm. Preferably, the peak luminous wavelength of the red LED is 630-640nm, the peak luminous wavelength of the green LED is 520-535nm, and the peak luminous wavelength of the blue LED is 460-470nm.

[0029] Furthermore, the luminous intensity of the red LED, green LED and blue LED can be independently controlled. The display control circuit can independently adjust the luminous intensity of the three color LEDs in each RGB pixel unit according to the image signal, thereby accurately controlling the color output of the display. For example, when it is necessary to display red, the luminous intensity of the red LED can be increased to the maximum value, while the luminous intensity of the green LED and the blue LED can be reduced to the minimum value. Similarly, the display can also display colors of any chromaticity and brightness by adjusting the luminous intensity ratio of the three color LEDs of RGB.

[0030] In order to protect the screen 6, a protective film 10 is fixedly connected to the upper surface of the screen 6. The protective film 10 can be made of tempered glass or sapphire glass, and its thickness is preferably 0.2-0.5 mm. The protective film 10 can not only prevent the screen 6 from being scratched, but also reduce the reflection of external light, making the display clearer. In addition, the protective film 10 can also provide certain support and protection for the screen 6, thereby improving the overall strength of the display screen.

[0031] In order to improve the utilization efficiency of the light emitted by the LED lamp beads, a reflective film 5 is fixedly connected to the upper surface of the substrate 2, and the reflective film 5 is located between the first LED lamp bead 3 and the second LED lamp bead 4. The reflective film 5 can reflect the light emitted by the LED lamp beads onto the screen 6 to reduce the loss of light. At the same time, the reflective film 5 can also isolate adjacent red, green and blue LED lamp beads to prevent light of different colors from mixing and affecting the display effect. The reflective film 5 is preferably made of silver plating or aluminum plating, and its thickness is generally 0.1-0.3mm.

[0032] In order to ensure the luminous efficiency and service life of the LED lamp beads, a heat dissipation silicone sheet 11 is bonded to the lower surface of the substrate 2. The heat dissipation silicone sheet 11 can help the LED lamp beads to quickly dissipate heat and reduce the operating temperature of the LED lamp beads. Preferably, the heat dissipation silicone sheet 11 is made of a silicone material with a high thermal conductivity, and its thermal conductivity can reach 2-5W / mK, and the thickness is generally 0.5-1mm. Good heat dissipation can not only extend the service life of the LED lamp beads, but also ensure the luminous efficiency and color stability of the LED lamp beads when they are working.

[0033] In order to further broaden the color gamut of the display screen, a high color gamut quantum optical film 7 is fixedly connected to the lower surface of the screen 6. The high color gamut quantum optical film 7 is made of quantum dot material, which can convert the spectrum emitted by the LED light source into a purer and more saturated color. Quantum dot material is a semiconductor nanocrystal with a diameter of 2-10nm, which has excellent optical properties and can adjust the emission wavelength according to its size to achieve precise control of the spectrum. The thickness of the high color gamut quantum optical film 7 is preferably 10-20μm, which can cover the entire visible spectrum region and achieve a color gamut coverage of more than 90% of NTSC.

[0034] In order to improve the brightness uniformity of the display screen, a light diffusion film 8 is arranged below the high color gamut quantum optical film 7. The light diffusion film 8 adopts a matte light diffusion film, and its surface has countless tiny convex structures, which can diffuse the point light source emitted by the LED light source into a uniform surface light source. At the same time, the matte structure can also reduce the propagation loss of light in the film and improve the optical utilization efficiency. The thickness of the light diffusion film 8 is generally 50-100μm, and it is preferably made of a material with high light transmittance and moderate haze, such as polycarbonate (PC) or polymethyl methacrylate (PMMA).

[0035] In order to further improve the brightness of the display screen, a brightness enhancement film 9 is fixedly connected to the lower surface of the light diffusion film 8. The brightness enhancement film 9 adopts a prism-type brightness enhancement film, and its surface has a regular triangular prism structure, which can gather light in a specific direction and improve the outgoing radiation intensity of the light. Preferably, the edge angle of the prism structure is 60-70°, the prism height is 30-50μm, and the prism period is 50-100μm. Reasonable prism structure design can control the light emission angle within 20-30°, significantly improving the front brightness. At the same time, the regular prism structure can also reduce the scattering loss of light in the film and further improve the optical efficiency. The thickness of the brightness enhancement film 9 is generally 50-200μm, and it is preferably made of a material with high light transmittance and good heat resistance, such as cycloolefin copolymer (COP) or polyester materials.

[0036] The mobile phone high color gamut full-color LED display provided by the utility model can significantly broaden the color gamut of the display screen and achieve a more gorgeous and realistic color display by adopting RGB three-color LED light source and introducing quantum dot optical film. At the same time, by accurately controlling the luminous intensity of the RGB three-color LED, fine adjustment of the color can be achieved to display any desired color. In addition, the reasonable design of optical structures such as reflective film, light diffusion film and light enhancement film can make full use of the LED light source, improve the optical efficiency and brightness uniformity of the display screen, and ensure the clarity and color stability of the displayed image. Finally, the adoption of efficient heat dissipation design can ensure the luminous efficiency and service life of the LED lamp beads and improve the reliability and stability of the display screen.

[0037] Compared with phosphors and organic materials, LED light sources have the advantages of high luminous efficiency, fast response speed, and good reliability, and are more suitable for the application requirements of high-end mobile phone displays. On the other hand, the utility model introduces a quantum dot optical film on the display screen, which uses the unique optical properties of quantum dot materials to convert the spectrum emitted by the LED light source into purer and more saturated colors, thereby further broadening the color gamut of the display screen and achieving excellent display effects. Compared with directly applying quantum dot materials to the backlight source or the light-emitting layer, the design using quantum dot optical films can maximize the advantages of quantum dot materials, while avoiding direct exposure of quantum dot materials to the device, thereby improving its stability and reliability.

[0038] In summary, the high color gamut full-color LED display for mobile phones provided by the utility model has significantly improved the color gamut, brightness, efficiency, reliability, etc. of the display, and can meet the growing demand for display effects of consumers. At the same time, the utility model adopts a reasonable structural design, mature and reliable technology, is easy to mass produce and promote application, and has broad market prospects.

[0039] The mobile phone high color gamut full-color LED display provided by the utility model has the advantages of wide color gamut, bright colors, high brightness, high efficiency, good reliability, etc., which can meet the ever-increasing demand of consumers for mobile phone display effects. At the same time, the utility model adopts a simple structure and mature technology, is easy to mass produce and promote application, and has a good market prospect.

[0040] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A high color gamut full-color LED display screen for a mobile phone, characterized in that: The invention comprises an outer frame (1) and a screen (6), wherein the upper surface of the outer frame (1) is fixedly connected to a substrate (2), and the upper surface of the substrate (2) is respectively fixedly connected to a first LED lamp bead (3) and a second LED lamp bead (4), wherein the first LED lamp bead (3) and the second LED lamp bead (4) are evenly distributed on the upper surface of the substrate (2), and the lower surface of the screen (6) is fixedly connected to a high color gamut quantum optical film (7), a light diffusion film (8) is arranged below the high color gamut quantum optical film (7), and a brightness enhancement film (9) is fixedly connected to the lower surface of the light diffusion film (8).

2. The high color gamut full-color LED display screen for a mobile phone according to claim 1, characterized in that: The first LED lamp bead (3) and the second LED lamp bead (4) comprise a red LED, a green LED and a blue LED.

3. The high color gamut full-color LED display screen for a mobile phone according to claim 2, characterized in that: The luminous intensities of the red LED, green LED and blue LED can be controlled independently.

4. The high color gamut full-color LED display screen for a mobile phone according to claim 1, characterized in that: A protective film (10) is fixedly connected to the upper surface of the screen (6).

5. The high color gamut full-color LED display screen for a mobile phone according to claim 1, characterized in that: A reflective film (5) is fixedly connected to the upper surface of the substrate (2).

6. The high color gamut full-color LED display screen for a mobile phone according to claim 5, characterized in that: The reflective film (5) is located between the first LED lamp bead (3) and the second LED lamp bead (4).

7. The high color gamut full-color LED display screen for a mobile phone according to claim 1, characterized in that: A heat dissipation silicone sheet (11) is bonded to the lower surface of the substrate (2).

8. The high color gamut full-color LED display screen for a mobile phone according to claim 1, characterized in that: The high color gamut quantum optical film (7) is made of quantum dot material.

9. The high color gamut full-color LED display screen for a mobile phone according to claim 1, characterized in that: The light diffusion film (8) is a matte-surface light diffusion film.

10. The high color gamut full-color LED display screen for a mobile phone according to claim 1, characterized in that: The brightness enhancement film (9) is a prism-type brightness enhancement film.

Images