CN115903307A - Display panel and preparation method thereof - Google Patents

Abstract

The embodiment of the disclosure provides a display panel and a preparation method thereof. The display panel includes: a liquid crystal panel including a color resist; and the backlight source is positioned below the liquid crystal panel, and the matching degree between the red, green and blue spectrum of the backlight source and the red, green and blue spectrum of the color resistance meets the set matching condition. The embodiment of the disclosure can improve the saturation of the panel under low gray scale and improve the picture quality of the panel.

Description

Display panel and manufacturing method thereof

technical field

The present disclosure relates to the field of display technology, in particular to a display panel and a manufacturing method thereof.

Background technique

With the improvement of people's quality of life and the continuous development of technology, the requirements for visual effects of display devices are also getting higher and higher. Among them, the BD Cell (double-layer Cell) panel is a relatively cutting-edge product in display equipment, and has an extremely high-quality product. For this type of panel, it is one of the research directions to further improve its image quality, such as contrast, saturation, and saturation at low gray scales.

Contents of the invention

Embodiments of the present disclosure provide a display panel and a manufacturing method thereof, so as to solve or alleviate one or more technical problems in the prior art.

As a first aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a display panel, including:

LCD panel, including color resistance;

The backlight is located below the liquid crystal panel, and the matching degree between the red, green, and blue spectra of the backlight and the red, green, and blue spectra of the color resistance satisfies a set matching condition.

In a possible implementation manner, the matching degree between the red, green, and blue spectra of the backlight and the red, green, and blue spectra of the color resistance satisfies a set matching condition, including one or a combination of the following:

The wavelength difference between the wavelength of the red, green and blue spectrum of the backlight and the wavelength of the red, green and blue spectrum of the color resistance satisfies a set threshold;

The peak difference between the peaks of the red, green, and blue spectra of the backlight and the peaks of the red, green, and blue spectra of the color resistance satisfies a set threshold.

In a possible implementation manner, the display panel further includes a polarizer located on a side of the liquid crystal panel away from or close to the backlight source.

In a possible implementation manner, the display mode of the liquid crystal panel is an ordinary light mode, and the polarizer is located on a side of the liquid crystal panel away from the backlight source.

In a possible implementation manner, the display mode of the liquid crystal panel is an extraordinary light mode, and the polarizer is located on a side of the liquid crystal panel close to the backlight source.

In a possible implementation manner, the liquid crystal panel includes a stacked first liquid crystal panel and a second liquid crystal panel, and the first liquid crystal panel is located on a side of the second liquid crystal panel away from the backlight; Wherein, the material of the first liquid crystal panel is high-contrast liquid crystal or negative liquid crystal, and the material of the second liquid crystal panel is negative liquid crystal.

In a possible implementation manner, the debugging parameter of the first liquid crystal panel is Gamma 1.2, and the debugging parameter of the second liquid crystal panel is Gamma 1.0.

In a possible implementation manner, the liquid crystal panel further includes an alignment film layer, and a material of the alignment film layer is an alignment film with a low pretilt angle.

As a first aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a preparation method, including:

Based on the red, green and blue spectrum of the color resistance in the liquid crystal panel, the backlight source of the liquid crystal panel is determined, wherein the matching degree between the red, green and blue spectrum of the backlight source and the red, green and blue spectrum of the color resistance satisfies the set The specified matching conditions;

The liquid crystal panel is arranged above the backlight source to obtain a display panel.

In a possible implementation manner, the determining the backlight source of the liquid crystal panel based on the red, green and blue spectrum of the color resistance in the liquid crystal panel includes:

Determine the liquid crystal panel among the plurality of candidate backlight sources based on the matching degree between the red, green and blue spectra of each of the backlight sources and the red, green and blue spectrum of the color resistance in the liquid crystal panel backlight.

In a possible implementation manner, the matching degree between the red, green, and blue spectra of the backlight and the red, green, and blue spectra of the color resistance satisfies a set matching condition, including one or a combination of the following:

The wavelength difference between the wavelength of the red, green and blue spectrum of the backlight and the wavelength of the red, green and blue spectrum of the color resistance satisfies a set threshold;

The peak difference between the peaks of the red, green, and blue spectra of the backlight and the peaks of the red, green, and blue spectra of the color resistance satisfies a set threshold.

In a possible implementation manner, the method also includes:

A polarizer is arranged on the surface of the liquid crystal panel which is away from or close to the backlight source.

In a possible implementation manner, the display mode of the liquid crystal panel is an ordinary light mode, and the polarizer is arranged on the surface of the liquid crystal panel on a side away from or close to the backlight source, including:

A polarizer is arranged on the surface of the liquid crystal panel away from the backlight source.

In a possible implementation manner, the display mode of the liquid crystal panel is an extraordinary light mode, and the arranging a polarizer on the surface of the liquid crystal panel away from or close to the backlight source includes:

A polarizer is arranged on a surface of the liquid crystal panel close to the backlight source.

In the technical solution provided by the embodiments of the present disclosure, a backlight whose matching degree between the red, green, and blue spectrum and the red, green, and blue spectrum of the color resistance in the panel meets the set matching conditions is selected as the backlight of the panel, which can improve the performance of the panel in low grayscale. Saturation at lower levels to improve the picture quality of the panel.

The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present disclosure will be readily apparent by referring to the drawings and the following detailed description.

Description of drawings

In the drawings, unless otherwise specified, the same reference numerals designate the same or similar parts or elements throughout the several drawings. The drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments according to the present disclosure and should not be taken as limiting the scope of the present disclosure.

FIG. 1 is a schematic diagram of a display panel according to an embodiment of the present disclosure;

FIG. 2 is a comparison diagram of a backlight source and a color resist according to an embodiment of the present disclosure;

FIG. 3 is a comparison diagram between color resists of an embodiment of the present disclosure;

FIG. 4 is a comparison diagram between backlight sources according to an embodiment of the present disclosure;

FIG. 5 is a comparison diagram between backlight sources according to another embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a light transmission panel according to an embodiment of the present disclosure;

7 is a schematic diagram of panel light leakage according to an embodiment of the present disclosure;

8 is a schematic diagram of panel light leakage according to another embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a light transmission panel according to another embodiment of the present disclosure;

Fig. 10 is a white light comparison diagram of different polarizers according to an embodiment of the present disclosure;

Fig. 11 is a red light comparison diagram of different polarizers according to an embodiment of the present disclosure;

Fig. 12 is a comparison diagram of green light of different polarizers according to an embodiment of the present disclosure;

13 is a blue light comparison diagram of different polarizers according to an embodiment of the present disclosure;

Fig. 14 is a red light contrast diagram of different liquid crystal materials according to an embodiment of the present disclosure;

Fig. 15 is a comparison diagram of green light of different liquid crystal materials according to an embodiment of the present disclosure;

Fig. 16 is a blue light comparison diagram of different liquid crystal materials according to an embodiment of the present disclosure;

FIG. 17 is a light transmittance curve diagram of different Gammas according to an embodiment of the present disclosure;

FIG. 18 is a light transmittance curve diagram of different Gammas according to another embodiment of the present disclosure;

FIG. 19 is a light transmittance curve diagram of different Gammas according to another embodiment of the present disclosure;

FIG. 20 is a voltage curve diagram of different Gammas according to an embodiment of the present disclosure;

FIG. 21 is a contrast curve diagram of different Gammas according to an embodiment of the present disclosure;

Fig. 22 is a contrast curve diagram of different Gammas according to another embodiment of the present disclosure;

Fig. 23 is a contrast curve diagram of different Gammas according to another embodiment of the present disclosure;

Fig. 24 is a contrast curve diagram of different Gammas according to another embodiment of the present disclosure;

FIG. 25 is a flowchart of a preparation method according to an embodiment of the present disclosure.

Detailed ways

In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive.

Saturation refers to the purity of color, which is the difference between color and non-color. Monochromatic light in the visible spectrum is the most saturated color light. Saturation can be understood as the degree of color, that is, the degree of "gray". More specifically, higher or lower saturation is the result of a higher or lower mixture of pure colors and neutral colors. If the saturation is high, it contains less neutral gray; if the saturation is low, it contains more gray. Unsaturated, mostly gray content is pigment and colored ink, its color is not bright, giving people a "turbid" gray feeling, but this judgment is too subjective. Saturation is expressed by a more quantitative means, which can be expressed by the proportion of pure color (or monochromatic light) components in the color. As shown in Figure 1, saturation is expressed as a percentage of WE/ME. Where E is equal-energy white light, and W is an example light.

In the field of display, there has always been a problem of low grayscale saturation. Generally, the display device can be adjusted through an algorithm to increase the low grayscale saturation of the display device. However, this requires the support of hardware and algorithms. As shown in Figure 2, by optimizing the display algorithm, the RGB (red green blue, red, green, blue) signal is converted into an HSV (HueSaturation Value, hue saturation lightness) signal, and the saturation of the HSV signal is increased to enhance the color of the displayed image purpose of saturation. Of course, there are also some other algorithms, such as histogram method, filtering method and other common methods to increase image quality. These algorithms are computationally complex, require hardware support, occupy resources, affect real-time performance, and increase project costs.

Therefore, the present disclosure provides a solution to achieve low grayscale saturation and improve image quality expression without adding additional components, processes, and costs.

FIG. 1 is a display panel according to an embodiment of the present disclosure.

As shown in FIG. 1 , the display panel includes: a liquid crystal panel and a backlight source, and the liquid crystal panel includes a color resist. Wherein, the backlight source is located under the liquid crystal panel, and the matching degree between the red, green and blue spectrum of the backlight source and the red, green and blue spectrum of the color resistance satisfies a set matching condition.

In some embodiments, a backlight source having a red, green and blue spectrum similar to that of the color resist can be selected as the backlight source of the display panel. Alternatively, a color resistance whose red, green and blue spectrum is similar to that of the backlight may be selected as the color resistance of the liquid crystal panel. Alternatively, a backlight source and color resist with a high matching degree of red, green and blue spectra may be selected as the backlight source and color resist of the liquid crystal panel. For example, light sources and color resists with similar waveforms, wavelengths, or peaks.

Exemplarily, the matching degree between the red, green, and blue spectra of the backlight source and the red, green, and blue spectra of the color resist satisfies a set matching condition, including one or a combination of the following:

The wavelength difference between the wavelength of the red, green and blue spectrum of the backlight and the wavelength of the red, green and blue spectrum of the color resistance meets the set threshold;

The peak difference between the peaks of the red, green, and blue spectra of the backlight source and the peaks of the red, green, and blue spectra of the color resistance satisfies a set threshold.

Wherein, the color-resist layer in the liquid crystal panel includes red color-resist, green color-resist and blue color-resist. The wavelength of the red light from the backlight is similar to the spectral wavelength and/or peak of the red color resist, that is, the wavelength difference satisfies the set threshold, and the wave peak difference satisfies the set threshold. The wavelength of the green light from the backlight is similar to the spectral wavelength and/or peak of the green color resist, that is, the wavelength difference satisfies the set threshold, and the wave peak difference satisfies the set threshold. The wavelength of the blue light from the backlight is similar to the spectral wavelength and/or peak of the blue color resist, that is, the wavelength difference satisfies the set threshold, and the wave peak difference satisfies the set threshold.

As shown in Figure 2 to Figure 5, the better the matching between the backlight (BLU, Back Light Unit) and the color resistance, that is, the closer the two spectral transmission peaks, the higher the dark field saturation. As shown in Figure 2, A1B1 of the green color resistance Green1 is closer to AB of the backlight than A2B2 of the color resistance Green2, that is, the green color resistance Green1 is better matched with the backlight, so the dark field saturation of the green color resistance Green1 is excellent For the green color resistance Green2, see Figure 3 for details. As shown in Figure 4, the C1D1 of the backlight BLU3 is closer to the CD of the blue color resistance Blue than the C2D2 of the backlight BLU2, that is, the matching between the backlight BLU3 and the blue color resistance Blue is better, so the dark field saturation of the backlight BLU3 is better than The backlight source BLU2 may be specifically shown in FIG. 5 . Therefore, choosing a combination of the backlight source and the peak wavelength of the color resistance is beneficial to the improvement of dark field saturation.

In a possible implementation manner, the display panel further includes a polarizer located on a side of the liquid crystal panel away from or close to the backlight source.

In a possible implementation manner, the display mode of the liquid crystal panel is an ordinary light mode, and the polarizer is located on a side of the liquid crystal panel away from the backlight source.

In a possible implementation manner, the display mode of the liquid crystal panel is an extraordinary light mode, and the polarizer is located on a side of the liquid crystal panel close to the backlight source.

As shown in FIG. 6 to FIG. 9 , after using a compensating polarizer (POL) to improve the contrast of the liquid crystal panel, the expressiveness of dark field details of the liquid crystal panel can be improved. First of all, for different display modes, the compensation layer needs to be adjusted accordingly. As shown in Figure 6 to Figure 9, the optical path diagrams of each display mode show that natural light passes through the panel from the POL below the panel and then reaches the POL on the panel, and its optical path is point S→point M1→point M2→point E. As shown in Figure 6 and Figure 9, when point I coincides with point E, the panel does not leak light. On the contrary, as shown in Figure 7 and Figure 8, point I and point E do not coincide, and light leakage occurs on the panel. Therefore, when the display mode of the panel is O-Mode (ordinary light mode), the optical compensation layer or optical compensation film should be located above the panel LCD, that is, the polarizer is located on the side of the liquid crystal panel away from the backlight. When the display mode of the panel is E-mode (extraordinary light mode), the optical compensation layer or optical compensation film should be located under the panel LCD, that is, the polarizer is located on the side of the liquid crystal panel away from the backlight. For double-layer panels, such as BD Cell, the dark state effect is better when the two-layer panels are superimposed after using compensation POL. As shown in Figures 10 to 11, when the gray scale is L0, the display brightness of the panel drops by 70%, so that the contrast ratio in the dark state can range from tens of thousands to hundreds of thousands, which is much higher than that of ordinary polarizers.

For Figures 6 to 9, PVA is polyvinyl alcohol film. O-TAC is cellulose triacetate, which forms a polarizer with light compensation film. LCD and ADS-LC are one of the liquid crystal panels.

For Figures 10 to 11, Gray represents the gray scale, CR represents the contrast, Normal POL represents the ordinary polarizer, CR@W represents the contrast of the white light on the panel under different gray scales, and CR@R～Gray represents the red light on the panel under different gray scales Contrast, CR@G represents the contrast of green light on the panel under different gray scales, and CR@B represents the contrast of blue light under different gray scales.

In a possible implementation manner, the liquid crystal panel includes a stacked first liquid crystal panel and a second liquid crystal panel, and the first liquid crystal panel is located on a side of the second liquid crystal panel away from the backlight; wherein, the material of the first liquid crystal panel It is high-contrast liquid crystal or negative liquid crystal, and the material of the second liquid crystal panel is negative liquid crystal. Wherein, the high-contrast liquid crystal is a liquid crystal having a large contrast and setting a threshold.

In a double-layer panel (BD Cell), the main panel (Main Cell) positive liquid crystal + sub-panel (Sub Cell) negative liquid crystal is compared with the Main Cell high-contrast liquid crystal + Sub Cell negative liquid crystal, the latter's double-layer panel It has more advantages in dark field saturation. Under the red, green and blue (R/G/B) picture, the saturation of the latter is higher than that of the former. As shown in Figure 14 to Figure 16, the brightness of the latter in the gray level L0 is small, that is, the scattering factor is small, so that it has less light leakage in the dark field, which can effectively enhance the saturation of the dark field and make it more expressive in details excellent.

According to the formula

in

The L0 brightness (scattering factor) is proportional to the refractive index anisotropy Δn and the thickness d of the liquid crystal layer, and inversely proportional to the elastic constant Kave (where K11 is splay, K22 is twist, and K33 is bend). From the liquid crystal parameters in Table 1, it can be known that the high-contrast liquid crystal has an advantage in the scattering factor S, which is consistent with the measured data, as shown in Figures 14 to 16. According to the liquid crystal parameters, Main negative liquid crystal + Sub negative liquid crystal will have a greater advantage in dark field saturation.

Among them, in Fig. 14 to Fig. 16, Gray represents grayscale, Saturation represents saturation, and LC represents liquid crystal. R represents red light, G represents green light, and B represents blue light.

Table 1: Different models of LCD parameters

negative liquid crystal High Contrast LCD MNT positive liquid crystal TV Positive LCD ne 1.5696 1.5949 1.5965 1.5834 no 1.478 1.4852 1.4858 1.4861 △n@589nm 0.0916 0.1097 0.1107 0.0973 K11 17.6 16.5 12.4 13.7 K33 18.6 17.9 12.8 15.5 K22 8.8 8.25 6.2 6.85 d 3.5 3.5 3.4 3.5 S 0.018184 0.028107 0.03781948 0.0259803 CR (single screen) 1400:1 1300:1 1000:1 1200:1

In a possible implementation manner, the debugging parameter of the first liquid crystal panel is Gamma 1.2, and the debugging parameter of the second liquid crystal panel is Gamma 1.0.

At present, most of the double-layer panel products have a Gamma of 2.8 to 3.2. For example, Main Cell Gamma2.2+SubCell Gamma 1.0, however, as shown in Figure 17, it has the problems of low grayscale saturation and low expressiveness of dark field picture details. To solve this problem, one of the effective methods is to set the Gamma debugging parameter of the panel to 2.2. Specifically, as shown in Figure 18, Main Cell Gamma 1.2+Sub Cell Gamma 1.0. As shown in Figure 19 and Figure 20, because the voltage of Gamma2.2 is higher than that of Gamma3.2 at different gray scales, the corresponding transmittance is high, as shown in Figure 21 to Figure 24, the Gamma 2.2 at low gray scales The R/G/B/W contrast ratio is higher than Gamma3.2, these factors are more conducive to enhancing the performance of details in dark field.

In a possible implementation manner, the liquid crystal panel further includes an alignment film layer, and the material of the alignment film layer is an alignment film with a low pretilt angle.

In order to reduce the brightness at L0, in addition to using liquid crystal with a small scattering coefficient, it can also be achieved by selecting a low pre-tilt angle guide film and photo-alignment process, which can increase the product contrast, thereby improving the performance of dark field details.

The Rubbing (rubbing alignment) process has a Rubbing Shadow (alignment shadow) area due to the level difference between the substrates. In this area, the alignment of the liquid crystal is disordered, and light leakage occurs on the panel under the gray scale L0. Especially for panels with a combination of HADS+negative liquid crystal, ADS+positive liquid crystal, and high PPI, the L0 light leakage in the alignment shadow area in the long side direction of the panel pixel is more serious, which has a greater impact on the contrast of the panel. Therefore, in the manufacturing process of the panel, the optical alignment process is used instead of the rubbing alignment process, so there is no weak area, which is beneficial to improve the contrast and dark field saturation of the panel.

FIG. 25 is a flowchart of a preparation method according to an embodiment of the present disclosure. As shown in Figure 25, the method includes:

S251. Determine the backlight source of the liquid crystal panel based on the red, green and blue spectrum of the color resistance in the liquid crystal panel, wherein the matching degree between the red, green and blue spectrum of the backlight and the red, green and blue spectrum of the color resistance satisfies a set matching condition ;

S251, disposing a liquid crystal panel above the backlight source to obtain a display panel.

In a possible implementation manner, in the above S251, the backlight source of the liquid crystal panel is determined based on the red, green and blue spectrum of the color resistance in the liquid crystal panel, including:

Based on the matching degree between the red, green and blue spectra of each backlight in the plurality of candidate backlights and the red, green and blue spectrum of the color resistance in the liquid crystal panel, the backlight of the liquid crystal panel is determined among the plurality of candidate backlights.

In a possible implementation manner, the matching degree between the red, green, and blue spectra of the backlight and the red, green, and blue spectra of the color resistance satisfies a set matching condition, including one or a combination of the following:

The wavelength difference between the wavelength of the red, green and blue spectrum of the backlight and the wavelength of the red, green and blue spectrum of the color resistance meets the set threshold;

The peak difference between the peaks of the red, green, and blue spectra of the backlight source and the peaks of the red, green, and blue spectra of the color resistance satisfies a set threshold.

In a possible implementation manner, the method also includes:

A polarizer is arranged on the surface of the liquid crystal panel away from or close to the backlight source.

In a possible implementation, the display mode of the liquid crystal panel is ordinary light mode, and a polarizer is arranged on the surface of the liquid crystal panel away from or close to the backlight, including:

A polarizer is arranged on the surface of the liquid crystal panel away from the backlight source.

In a possible implementation manner, the display mode of the liquid crystal panel is an extraordinary light mode, and a polarizer is arranged on the surface of the liquid crystal panel away from or close to the backlight source, including:

A polarizer is arranged on the surface of the liquid crystal panel close to the backlight source.

The effect achieved by the preparation method provided in the embodiment of the present disclosure is consistent with the effect of the above-mentioned display panel, and will not be described in detail here.

As an embodiment of the present disclosure, an embodiment of the present disclosure further provides an electronic device, including the above-mentioned display panel. The electronic device can be any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital camera, a navigator, and the like.

In the present disclosure, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of these features. In the description of the present disclosure, "plurality" means two or more, unless otherwise specifically defined.

In this disclosure, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection unless otherwise clearly defined and limited. , or integrated; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection or an indirect connection through an intermediary, it can be the internal communication of two components or the interaction relationship between two components . Those of ordinary skill in the art can understand the specific meanings of the above terms in the present disclosure according to specific situations.

In the present disclosure, unless otherwise clearly stated and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "below" and "under" the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is less horizontal than the second feature.

The above disclosure provides many different embodiments or examples for implementing different structures of the present disclosure. To simplify the present disclosure, the components and arrangements of specific examples are described above. Of course, they are merely examples, and are not intended to limit the present disclosure. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in different instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed.

The above is only a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any person skilled in the art can easily think of various changes or replacements within the technical scope of the present disclosure. These should all fall within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be determined by the protection scope of the claims.

Claims (14)

1. A display panel, characterized in that, comprising LCD panel, including color resistance; The backlight is located below the liquid crystal panel, and the matching degree between the red, green, and blue spectra of the backlight and the red, green, and blue spectra of the color resistance satisfies a set matching condition. 2. The display panel according to claim 1, wherein the matching degree between the red, green and blue spectrum of the backlight and the red, green and blue spectrum of the color resistance satisfies the set matching conditions, including the following One or combination: The wavelength difference between the wavelength of the red, green and blue spectrum of the backlight and the wavelength of the red, green and blue spectrum of the color resistance satisfies a set threshold; The peak difference between the peaks of the red, green, and blue spectra of the backlight and the peaks of the red, green, and blue spectra of the color resistance satisfies a set threshold. 3. The display panel according to claim 1, further comprising a polarizer located on a side of the liquid crystal panel away from or close to the backlight source. 4. The display panel according to claim 3, wherein the display mode of the liquid crystal panel is an ordinary light mode, and the polarizer is located on a side of the liquid crystal panel away from the backlight source. 5. The display panel according to claim 3, wherein the display mode of the liquid crystal panel is an extraordinary light mode, and the polarizer is located on a side of the liquid crystal panel close to the backlight source. 6. The display panel according to claim 1, wherein the liquid crystal panel comprises a stacked first liquid crystal panel and a second liquid crystal panel, and the first liquid crystal panel is located far away from the second liquid crystal panel. One side of the backlight; wherein, the material of the first liquid crystal panel is a negative liquid crystal or a liquid crystal with a contrast greater than a set threshold, and the material of the second liquid crystal panel is a negative liquid crystal. 7. The display panel according to claim 6, wherein the debugging parameter of the first liquid crystal panel is Gamma 1.2, and the debugging parameter of the second liquid crystal panel is Gamma 1.0. 8 . The display panel according to claim 1 , wherein the liquid crystal panel further comprises a guide film layer, and the material of the guide film layer is a guide film with a pretilt angle lower than a preset threshold. 9. A preparation method, characterized in that, comprising: Based on the red, green and blue spectrum of the color resistance in the liquid crystal panel, the backlight source of the liquid crystal panel is determined, wherein the matching degree between the red, green and blue spectrum of the backlight source and the red, green and blue spectrum of the color resistance satisfies the set The specified matching conditions; The liquid crystal panel is arranged above the backlight source to obtain a display panel. 10. The method according to claim 9, wherein the determination of the backlight source of the liquid crystal panel based on the red, green and blue spectrum of the color resistance in the liquid crystal panel comprises: Determine the liquid crystal panel among the plurality of candidate backlight sources based on the matching degree between the red, green and blue spectra of each of the backlight sources and the red, green and blue spectrum of the color resistance in the liquid crystal panel backlight. 11. The method according to claim 9, wherein the matching degree between the red, green and blue spectrum of the backlight and the red, green and blue spectrum of the color resistance satisfies a set matching condition, including one of the following or a combination of: The wavelength difference between the wavelength of the red, green and blue spectrum of the backlight and the wavelength of the red, green and blue spectrum of the color resistance satisfies a set threshold; The peak difference between the peaks of the red, green, and blue spectra of the backlight and the peaks of the red, green, and blue spectra of the color resistance satisfies a set threshold. 12. The method of claim 9, further comprising: A polarizer is arranged on the surface of the liquid crystal panel which is away from or close to the backlight source. 13. The method according to claim 12, wherein the display mode of the liquid crystal panel is an ordinary light mode, and a polarizer is provided on the surface of the liquid crystal panel that is far away from or close to the backlight source, include: A polarizer is arranged on the surface of the liquid crystal panel away from the backlight source. 14. The method according to claim 12, wherein the display mode of the liquid crystal panel is an extraordinary light mode, and a polarizer is arranged on a surface of the liquid crystal panel that is far away from or close to the backlight source ,include: A polarizer is arranged on a surface of the liquid crystal panel close to the backlight source.

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