Display screen for improving large viewing angle parallax

Abstract

The application relates to a display screen with improved large-viewing-angle chromatic aberration, which comprises a support and, from bottom to top, a backlight plate, a plurality of LED lamps, a reflector and a screen arranged on the support in sequence, each LED lamp is arranged in the circumferential direction of the support, each LED lamp comprises a shell, a blue light chip arranged in the shell and fluorescent glue solution poured around the periphery of the blue light chip, the fluorescent glue solution comprises a fluorescent powder composition and glue, and the fluorescent powder composition comprises the following components in percentage by mass: 29.30%-29.34% of green fluorescent powder, 70.66%-70.70% of KSF fluorescent powder, and the fluorescent powder composition accounts for 34.43%-34.47% of the glue, and the display screen further comprises a polaroid arranged on the upper side of the screen. By adopting the technical scheme, the display screen with improved large-viewing-angle chromatic aberration is provided, the proportion of KSF fluorescent powder is reduced, the proportion of green fluorescent powder is increased, the red light component in the backlight LED is reduced, the mixed white light is more uniform, and the phenomenon of red light emission in large-viewing-angle surface light mixing is improved.

Description

Technical Field

[0001] This invention relates to a display screen that improves large viewing angle difference. Background Technology

[0002] In-vehicle displays are evolving towards larger screens, multiple screens, higher resolution, greater interactivity, and more diverse structural forms. With social development and improved living standards, users' demands for electronic products are constantly increasing. Resolution and color gamut are the most direct aspects of a display device for users. Currently, 4K / 8K resolution has largely met users' needs for clarity, and color gamut will be the next hot topic for users. Improved color gamut allows for a more intuitive understanding of a device's color display capabilities, significantly enhancing the user's sensory experience.

[0003] Standard color gamut white LEDs consist of a blue LED chip and phosphor, with an NTSC color gamut of around 72%. In recent years, the proportion of high color gamut LEDs has been continuously increasing, ushering in the era of high color gamut displays. High color gamut white LEDs consist of a blue LED chip, green phosphor, and KSF phosphor. The blue LED chip emits blue light, the green phosphor produces green light, and the KSF phosphor produces red light. The three colors mix to form white light, with an NTSC ≥ 85%. The green phosphor accounts for 26.03%, and the KSF phosphor accounts for 73.97%. These two types of phosphors are mixed with a cohesive adhesive. After degassing and thorough mixing, the mixture is dropped into the LED holder housing containing the blue LED chip. The LED holder is then baked to cure the cohesive adhesive, resulting in a white LED chip.

[0004] However, when the aforementioned high color gamut LED backlights are used in conjunction with display glass from different brands, and multiple displays are used together, problems such as red or purple discoloration occur at wide viewing angles, resulting in poor performance. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a display screen that improves the viewing angle difference by reducing the proportion of KSF phosphor, increasing the proportion of green phosphor, and reducing the red light component in the backlight LED, so that the mixed white light is more uniform and the phenomenon of reddish light at a large viewing angle is improved by surface mixing.

[0006] The technical solution of the present invention is as follows: a display screen for improving large viewing angle piezoresistive distortion, the display screen comprising a bracket and a backlight panel, a plurality of LEDs, a reflector and a screen arranged sequentially from bottom to top on the bracket, each LED being arranged circumferentially along the bracket, each LED comprising a housing, a blue light chip disposed within the housing and a fluorescent adhesive solution poured around the blue light chip, the fluorescent adhesive solution comprising a phosphor composition and adhesive, the phosphor mixture comprising the following components by mass percentage: green phosphor 29.30%~29.34%, KSF phosphor 70.66%~70.70%, the phosphor composition comprising 34.43%~34.47% of the adhesive, and further comprising a polarizer disposed on the upper side of the screen, the polarizer having a compensation film disposed on the polarizer.

[0007] Specifically, the phosphor mixture comprises the following components by mass percentage: 29.32% green phosphor, 70.68% KSF phosphor, and the phosphor composition accounts for 34.45% of the adhesive.

[0008] By adopting the above technical solution, by reducing the proportion of KSF phosphor and increasing the proportion of green phosphor, and at the same time increasing the phosphor concentration, the red light component in the backlight LED can be reduced, making the mixed white light more uniform, thereby improving the reddish incense sticks at a wide viewing angle. At the same time, a polarizer with a compensation film is added to optimize the optical path difference, further improving the reddish phenomenon at a wide viewing angle, making the black background darker, and increasing the contrast and side viewing angle brightness.

[0009] A further feature of this invention is the white balance calibration of the display screen, which involves adjusting the screen's Gamma. The specific steps are as follows: S1: Power on for calibration initialization, set the target white point coordinates, X=0.28-0.30, Y=0.31-0.33; S2: Keep the default Gamma setting; S3: Using 8-bit binding points as the level, test the brightness data of grayscale 0-255; S4: Import the tested brightness data into the new Gamma generation function library for calculation to obtain new set data. If interrupted, return to the previous step and continue to import and generate again. S5: Load new Gamma data and test whether the 0-255 grayscale Gamma meets the requirements. If it does not meet the requirements, return to S2. S6: Files that meet the requirements in S5 are burned into Flash or OTP into the chip's storage space.

[0010] Specifically, the coordinates of the white point in S1 are X=0.29 and Y=0.32.

[0011] By adopting the above further settings, the screen color difference is adjusted so that there is no color difference when multiple displays are used together, realizing multi-screen wide-viewing-angle color calibration, achieving a screen color gamut of up to 88% or more, and no obvious color difference when viewed from a wide angle. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a display screen according to a specific embodiment of the present invention; Figure 2 This is a block diagram of a white balance calibration method according to a specific embodiment of the present invention. Detailed Implementation

[0013] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] It should be noted that in the description of this invention, all directional indications (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0015] Furthermore, in this invention, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0016] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0017] like Figure 1-2As shown, a display screen for improving viewing angle aberration includes a support 1 and, from bottom to top, a backlight panel 2, several LEDs 3, a reflector 4, and a screen 5, all arranged sequentially on the support 1. When multiple displays are connected, displays of different brands and technologies, such as A-Si or LTPS, can be used, and the display is not limited to one type. Each LED 3 is arranged circumferentially along the support 1. Each LED includes a housing, a blue light chip disposed within the housing, and a phosphor adhesive solution poured around the periphery of the blue light chip. The phosphor adhesive solution includes a phosphor composition and glue. The phosphor mixture includes the following components by mass percentage: The composition includes 29.30%~29.34% green phosphor and 70.66%~70.70% KSF phosphor. KSF is a fluoride phosphor, specifically potassium fluorosilicate excited by tetravalent manganese. The phosphor composition accounts for 34.43%~34.47% of the adhesive. The composition also includes a polarizer 6, which is disposed on the upper side of the screen 5. The polarizer 6 is provided with a compensation film. Because TFT glass has an optical path difference when viewed by the human eye at a large viewing angle, and different display glass has different refractive indices, adding a polarizer with a compensation film can optimize the optical path difference, improve the reddish phenomenon at a large viewing angle, make the black background darker, and increase the contrast and side viewing angle brightness.

[0018] Specifically, the phosphor mixture comprises the following components by mass percentage: 29.32% green phosphor, 70.68% KSF phosphor, and the phosphor composition accounts for 34.45% of the adhesive. By reducing the proportion of KSF phosphor and increasing the proportion of green phosphor, and simultaneously increasing the phosphor concentration, the red light component in the backlight LED can be reduced, making the mixed white light more uniform, thereby improving the reddish tint at wide viewing angles. Additionally, the addition of a polarizer with a compensation film optimizes the optical path difference, further improving the reddish tint at wide viewing angles, resulting in darker black backgrounds, increased contrast, and improved brightness at side viewing angles.

[0019] Further settings: Perform white balance calibration on the display and adjust the screen gamma, such as... Figure 2 As shown, the specific steps are as follows: S1: Power on for calibration initialization, set the target white point coordinates, X=0.28-0.30, Y=0.31-0.33; S2: Keep the default Gamma setting; S3: Using 8-bit binding points as the level, test the brightness data of grayscale 0-255; S4: Import the tested brightness data into the new Gamma generation function library for calculation to obtain new set data. If interrupted, return to the previous step and continue to import and generate again. S5: Load new Gamma data and test whether the 0-255 grayscale Gamma meets the requirements. If it does not meet the requirements, return to S2. S6: Files that meet the requirements in S5 are burned into Flash or OTP into the chip's storage space.

[0020] Specifically, the coordinates of the white point in S1 are X=0.29 and Y=0.32. By adjusting the screen color difference through white balance calibration, there is no color difference when multiple displays are used together, achieving multi-screen wide-viewing-angle color calibration, achieving a screen color gamut of over 88%, and no obvious color difference at wide viewing angles.

Claims

1. A display screen for improving viewing angle aberration, the display screen comprising a bracket and, from bottom to top, a backlight panel, a plurality of LEDs, a reflector, and a screen, arranged sequentially on the bracket, wherein each LED is arranged circumferentially along the bracket, and each LED includes a housing, a blue light chip disposed within the housing, and a fluorescent adhesive solution poured onto the periphery of the blue light chip, the fluorescent adhesive solution comprising a phosphor composition and an adhesive, characterized in that, The phosphor composition comprises the following components by mass percentage: 29.30%~29.34% green phosphor, 70.66%~70.70% KSF phosphor, and the phosphor composition accounts for 34.43%~34.47% of the adhesive. It also includes a polarizer, which is disposed on the upper side of the screen and has a compensation film on it.

2. The display screen for improving large viewing angle difference according to claim 1, characterized in that, The phosphor mixture comprises the following components by weight percentage: 29.32% green phosphor, 70.68% KSF phosphor, and the phosphor composition accounts for 34.45% of the adhesive.

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