Display panel and display device
By designing special color filter layers and liquid crystal layers on the color filter substrate and array substrate in the display panel, the angle of light and color mixing are controlled, solving the problems of brightness reduction and cost increase in existing privacy protection technologies, and achieving a highly efficient privacy protection effect and a user-friendly experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- MIANYANG HKC OPTOELECTRONICS TECH CO LTD
- Filing Date
- 2024-11-28
- Publication Date
- 2026-06-26
AI Technical Summary
Existing display panels suffer from issues such as reduced brightness, increased cost, and increased thickness in privacy protection designs, which negatively impact user experience.
A special color filter layer design is adopted between the color filter substrate and the array substrate, including first and second light-shielding layers, combined with liquid crystal layer and support pillars, to control the light angle and color mixing, thereby achieving a privacy protection effect.
Without affecting the display effect from the front viewing angle, it effectively prevents the content from being viewed from the side, improves the user's privacy experience and ease of use, and reduces power consumption and cost.
Smart Images
Figure CN119355995B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, and more particularly to a display panel and display device. Background Technology
[0002] With the development of display technology, the viewing angle of display panels is constantly widening. While users enjoy a wider viewing experience, this may also lead to the leakage of personal information. For example, when users communicate with family and friends about private matters via mobile phone, they want the content displayed on their phone to be kept private to avoid personal embarrassment or financial loss due to information leakage. To strengthen the protection of personal information, users often tilt the screen or cover their faces with their bodies, causing inconvenience to users. Summary of the Invention
[0003] In view of this, this application provides a display panel and a display device for implementing privacy protection of the display device, thereby improving the user's privacy protection experience and ease of use.
[0004] To achieve the above objectives, in a first aspect, embodiments of this application provide a display panel, which includes: a color filter substrate, an array substrate, and a liquid crystal layer located between the color filter substrate and the array substrate;
[0005] The color filter substrate includes a substrate and a first color filter layer formed on the substrate. The first color filter layer includes a plurality of first color resists arranged in an array and a first light-shielding layer located between adjacent first color resists. Each first color resist forms a plurality of color resist units arranged in an array. Each color resist unit includes a first primary color resist, a first transparent color resist, and a second primary color resist arranged along a first direction.
[0006] A second color filter layer is formed on the side of the array substrate near the liquid crystal layer. The second color filter layer includes a plurality of second color resists arranged in an array and a second light-shielding layer formed between adjacent second color resists. The second color resists correspond one-to-one with the first color resists. Each second color resist includes a second transparent color resist corresponding to the position of the first primary color resist, a third transparent color resist corresponding to the position of the second primary color resist, and a third primary color resist corresponding to the position of the first transparent color resist.
[0007] In one possible implementation of the first aspect, the first light-shielding layer and the second light-shielding layer satisfy the following: the angle range of α is 20° to 65°, and tanα = H / (A+B);
[0008] Where H represents the distance between the first light-shielding layer and the second light-shielding layer, A represents half the width of the first light-shielding layer, and B represents half the width of the second light-shielding layer.
[0009] In one possible implementation of the first aspect, the liquid crystal layer includes support pillars;
[0010] The first light-shielding layer includes multiple first black matrices and multiple second black matrices arranged at intervals along a first direction. The first black matrices and the second black matrices are intersected, and a first light-shielding area for blocking the support column is provided at a portion of the intersection of the first black matrices and the second black matrices. The second light-shielding layer includes multiple first light-shielding metals and multiple second light-shielding metals arranged at intervals along a first direction. The first light-shielding metals and the second light-shielding metals are intersected, and a second light-shielding area for blocking the support column is provided at a portion of the intersection of the first light-shielding metals and the second light-shielding metals.
[0011] In one possible implementation of the first aspect, the first light-shielding metal and the second light-shielding metal define a plurality of rectangular openings for providing pixel electrodes, the thickness of which is greater than or equal to the thickness of the second light-shielding layer.
[0012] In one possible implementation of the first aspect, a first flattening layer is provided on the lower surface of the first color filter layer, and the two ends of the support column abut against the first flattening layer and the second light-shielding layer.
[0013] In one possible implementation of the first aspect, the projection shapes of the first light-shielding area and the second light-shielding area on the substrate are rectangular.
[0014] In one possible implementation of the first aspect, the projection area of the second light-shielding layer on the substrate is located within the projection area of the first light-shielding layer on the substrate, and the projection of the central axis of each of the first black matrices on the substrate coincides with the projection of the central axis of each of the first light-shielding metals on the substrate, and the projection of the central axis of each of the second black matrices on the substrate coincides with the projection of the central axis of each of the second light-shielding metals on the substrate.
[0015] In one possible implementation of the first aspect, the array substrate further includes a thin-film transistor layer and a second planarization layer formed on the thin-film transistor layer, the second planarization layer having a plurality of opening regions etched thereon for accommodating the third primary color resist, the second planarization layer forming the second transparent color resist and the third transparent color resist.
[0016] In one possible implementation of the first aspect, the first primary color resist, the second primary color resist, and the third primary color resist are all different in color but the same in size and shape.
[0017] Secondly, embodiments of this application provide a display device, a backlight module, and a display panel as described in the first aspect or any possible implementation of the first aspect, wherein the backlight module is used to provide a backlight source for the display panel.
[0018] The display panel and display device provided in this application embodiment include: a color filter substrate, an array substrate, and a liquid crystal layer located between the color filter substrate and the array substrate; the color filter substrate includes a substrate and a first color filter layer formed on the substrate, the first color filter layer includes a plurality of first color resists arranged in an array and a first light-shielding layer located between adjacent first color resists, each first color resist forming a plurality of color resist units arranged in an array, each color resist unit including a first primary color resist, a first transparent color resist, and a second primary color resist arranged along a first direction; a second color filter layer is formed on the side of the array substrate near the liquid crystal layer, the second color filter layer includes a plurality of second color resists arranged in an array and a second light-shielding layer formed between adjacent second color resists, the second color resists correspond one-to-one with the first color resists, each second color resist including a second transparent color resist corresponding to the position of the first primary color resist, a third transparent color resist corresponding to the position of the second primary color resist, and a third primary color resist corresponding to the position of the first transparent color resist. This can achieve privacy protection for the display device, improving the user's privacy experience and ease of use. Attached Figure Description
[0019] Figure 1 A schematic diagram showing the viewing angles provided in the embodiments of this application;
[0020] Figure 2 A cross-sectional schematic diagram of a display panel provided in an embodiment of this application;
[0021] Figure 3 A top view of the display panel provided in an embodiment of this application;
[0022] Figure 4 A schematic diagram showing the relationship between the first light-shielding layer and the second light-shielding layer provided in the embodiments of this application;
[0023] Figure 5 A top view of the first light-shielding layer provided in an embodiment of this application;
[0024] Figure 6 A top view of the second light-shielding layer provided in an embodiment of this application;
[0025] Figure 7 A top view of the second flat layer provided in an embodiment of this application;
[0026] Figure 8 A grayscale image showing the display effect of a solid color image on a display panel provided in this application embodiment;
[0027] Figure 9A schematic diagram of the lighting when viewing a red image from a positive angle, as provided in an embodiment of this application;
[0028] Figure 10 A schematic diagram of the lighting when viewing a red image from a left-hand perspective, as provided in an embodiment of this application.
[0029] Figure 11 A schematic diagram of the lighting when viewing a red image from a right-angle perspective, as provided in an embodiment of this application.
[0030] Figure 12 A schematic diagram of light when viewing a green image from a positive angle, as provided in an embodiment of this application;
[0031] Figure 13 A schematic diagram of the lighting when viewing a green image from a left-hand perspective, as provided in an embodiment of this application.
[0032] Figure 14 A schematic diagram of the lighting when viewing a green image from a right-angle perspective, as provided in an embodiment of this application.
[0033] Figure 15 This application provides a schematic diagram of the light source when viewing a blue image from a normal viewing angle in an embodiment of the present application;
[0034] Figure 16 A schematic diagram of the lighting when viewing a blue image from a left-hand perspective, as provided in an embodiment of this application;
[0035] Figure 17 A schematic diagram of the lighting when viewing a blue screen from a right-angle perspective, as provided in an embodiment of this application;
[0036] Figure 18 A schematic diagram of the lighting when viewing a white image from a positive angle, as provided in an embodiment of this application;
[0037] Figure 19 A schematic diagram of the lighting when viewing a white image from a left-hand perspective, as provided in an embodiment of this application.
[0038] Figure 20 A schematic diagram of the lighting when viewing a white image from a right-side perspective, as provided in an embodiment of this application.
[0039] Figure 21 This is a schematic diagram of the structure of the display device provided in the embodiments of this application.
[0040] Explanation of reference numerals in the attached figures:
[0041] 1-Color filter substrate; 11-Substrate substrate; 12-First color filter layer; 121-First color resist; 1211-First primary color resist; 1212-First transparent color resist; 1213-Second primary color resist; 122-First light-shielding layer; 1221-First black matrix; 1222-Second black matrix; 1223-First light-shielding area;
[0042] 2-Array substrate; 21-Second color filter layer; 211-Second color resist; 2111-Second transparent color resist; 2112-Third transparent color resist; 2113-Third primary color color resist; 212-Second light-shielding layer; 2121-First light-shielding metal; 2122-Second light-shielding metal; 2123-Second light-shielding region; 22-Thin film transistor layer; 23-Second planarization layer; 231-Aperture region;
[0043] 3-Liquid crystal layer; 31-Liquid crystal molecule; 32-Support pillar; 4-First planarization layer; 5-Pixel electrode;
[0044] 100 - Display panel; 200 - Backlight module. Detailed Implementation
[0045] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is only for explaining specific embodiments and is not intended to limit the application. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.
[0046] With the increasing prevalence of LCD displays, they have been applied to all aspects of life and work, making the protection of personal and work information an issue that cannot be ignored. Portable display devices such as mobile phones and laptop power banks, due to their numerous usage scenarios and the wealth of personal information associated with them, are particularly vulnerable to serious consequences from leaks. In the display field, viewing angle is the angle formed by the line of sight and the perpendicular direction to the display panel. (See [reference needed]). Figure 1 The sum of θ and φ is called the viewing angle (or the visible angle). Within the viewing angle, the user can normally view the content displayed on the display panel. Outside the viewing angle, it can be called the privacy angle ρ.
[0047] In existing technologies, common privacy protection methods include applying a venetian blind film to the outside of the display panel, setting two layers of privacy-protecting liquid crystal layers inside the display panel, and using dual-source dual-light guide plates. The venetian blind film controls the viewing angle by manipulating the angle of light exiting the grating. When viewing the display from angles outside the visible viewing angle, the light is blocked by the grating, making the display unclear. However, this method leads to a decrease in display brightness, requiring users to increase the brightness to see the content, thus increasing power consumption. The two-layer privacy-protecting liquid crystal layer solution requires three polarizers and four glass substrates, which not only degrades the display effect at the correct viewing angle but also increases the thickness and cost of the display panel. In the dual-source dual-light guide plate solution, each light source corresponds to one light guide plate, which obviously also increases the cost, thickness, and power consumption of the display panel.
[0048] In view of this, embodiments of this application provide a display panel that can improve the user experience while providing privacy protection.
[0049] Figure 2 This is a cross-sectional schematic diagram of a display panel provided in an embodiment of this application. Figure 3 This is a top view of a display panel provided in an embodiment of this application. Figure 2 and Figure 3 As shown, the display panel may include: a color filter substrate 1, an array substrate 2, and a liquid crystal layer 3 located between the color filter substrate 1 and the array substrate 2.
[0050] The color filter substrate 1 may include a substrate 11 and a first color filter layer 12 formed on the substrate 11. The substrate 11 may be a glass substrate, thereby improving flatness and light transmittance. The first color filter layer 12 may include a plurality of first color resists 121 arranged in an array and a first light-shielding layer 122 located between adjacent first color resists 121. Each first color resist 121 may form a plurality of color resist units arranged in an array, and each color resist unit may include a first color filter layer along a first direction (…). Figure 3 The first primary color resist 1211, the first transparent color resist 1212, and the second primary color resist 1213 are arranged in the X direction. The first light-shielding layer 122 can reduce the color mixing between the light emitted from adjacent color resists, thereby improving the contrast and color saturation of the displayed image, making the colors more vivid and accurate.
[0051] A second color filter layer 21 may be formed on the side of the array substrate 2 near the liquid crystal layer 3. The second color filter layer 21 includes a plurality of second color resists 211 arranged in an array and a second light-shielding layer 212 formed between adjacent second color resists 211. The second color resists 211 correspond one-to-one with the first color resists 121. Each second color resist 211 includes a second transparent color resist 2111 corresponding to the position of the first primary color color resist 1211, a third transparent color resist 2112 corresponding to the position of the second primary color color resist 1213, and a third primary color color resist 2113 corresponding to the position of the first transparent color resist 1212. The function of the second light-shielding layer 212 can be referred to the function of the first light-shielding layer 122, and will not be described again here.
[0052] The first primary color resist 1211, the second primary color resist 1213, and the third primary color resist 2113 each have different colors. For example, the first primary color resist 1211 can be red, the second primary color resist 1213 can be green, and the third primary color resist 2113 can be blue. The first primary color resist 1211 allows light of the first primary color to pass through and absorbs light of other colors, thereby displaying the first primary color. The first primary color resist 1211 may contain a colored material corresponding to the first primary color, a transparent polymer, a multifunctional monomer, and additives. Compared with the first primary color resist 1211, the other primary color resists differ mainly in the colored materials used. The first transparent color resist 1212, the second transparent color resist 2111, and the third transparent color resist 2112 do not contain any colored materials.
[0053] The liquid crystal layer 3 may include liquid crystal molecules 31, support pillars 32, and alignment films (not shown) located on the upper and lower sides of the liquid crystal molecules 31 for aligning the liquid crystal molecules 31. The liquid crystal molecules 31 are a special organic compound with a specific arrangement and optical rotation properties. When the liquid crystal molecules 31 are driven by an electric field, they can rotate or rearrange, thereby changing the direction of light propagation.
[0054] The support pillar 32 can be made of photoresist and serves to separate the liquid crystal layer 3 from the frame adhesive, support the display panel, and control the thickness of the liquid crystal layer 3. The alignment capability of the alignment film can guide the liquid crystal molecules 31 to form a pretilt angle when no voltage is applied, thereby achieving a uniform alignment effect, which can accelerate the deflection speed of the liquid crystal molecules 31 and reduce image retention.
[0055] Through the above implementation method, users can see the display screen normally when viewing the display panel from a frontal angle, but when viewed from a side angle, the color of the light emitted by the display panel may be mixed, making it difficult to see the content of the display screen, thereby achieving privacy protection.
[0056] See Figure 4 The first light-shielding layer 122 and the second light-shielding layer 212 can satisfy the following: the angle range of α is 20° to 65°, tanα = H / (A+B). Here, H can represent the distance between the first light-shielding layer 122 and the second light-shielding layer 212, A can represent half the width of the first light-shielding layer 122, and B can represent half the width of the second light-shielding layer 212. This allows the privacy angle ρ to be between 25° and 70°, thus providing privacy while satisfying user needs. It is understandable that the values of H, A, and B can also be determined according to actual requirements.
[0057] Considering that the thicknesses of the first primary color resist 1211, the first transparent color resist 1212, and the second primary color resist 1213 may differ, in some embodiments, a first planarization layer 4 can be provided on the lower surface of the first color filter layer 12. This allows the two ends of the support pillar 32 to abut between the first planarization layer 4 and the second light-shielding layer 212, thereby improving the support stability of the support pillar 32 and thus improving the reliability of the display panel. The first primary color resist 1211, the second primary color resist 1213, and the third primary color resist 2113 can have the same size and shape, thereby reducing color shift when the user views the display panel directly.
[0058] Figure 5 A top view of the first light-shielding layer provided in the embodiments of this application, as shown below. Figure 5 As shown, the first light-shielding layer 122 may include multiple first black matrices 1221 extending along a first direction and multiple second black matrices 1222 extending along a second direction, which are arranged at intervals. The first black matrices 1221 and the second black matrices 1222 may be arranged intersectingly. A first light-shielding area 1223 for blocking the support column 32 may be provided at part of the intersection of the first black matrices 1221 and the second black matrices 1222.
[0059] Figure 6 This is a top view of the second light-shielding layer provided in an embodiment of this application. Figure 6 As shown, the second light-shielding layer 212 can be made of metallic or non-metallic materials. The following description uses the example of the second light-shielding layer 212 being made of metallic materials. The second light-shielding layer 212 may include multiple first light-shielding metal strips 2121 extending along a first direction and multiple second light-shielding metal strips 2122 extending along a second direction, spaced apart. The first light-shielding metal strips 2121 and second light-shielding metal strips 2122 may be arranged intersectingly. A second light-shielding area 2123 for blocking the support column 32 may be provided at some of the intersection points of the first light-shielding metal strips 2121 and second light-shielding metal strips 2122.
[0060] Similar to the first color filter layer, the second light-shielding layer 212 can reduce color mixing between adjacent color resists, thereby enabling it to block light and control the light emission angle of the second color resist 211. Furthermore, when the thin-film transistor drives the liquid crystal molecules 31 to deflect, a driving voltage needs to be transmitted to the pixel electrode 5 via a transmission line. Compared to using a non-metallic material for the second light-shielding layer 212, this embodiment uses a metal to fabricate the second light-shielding layer 212. This allows the first light-shielding metal 2121 and the second light-shielding metal 2122 to also transmit the driving voltage to the pixel electrode 5, thus enabling the reuse of the second light-shielding layer 212.
[0061] Figure 5 and Figure 6Taking the projection shape of the first light-shielding area 1223 and the second light-shielding area 2123 onto the substrate 11 as an outwardly expanding rectangle as an example, other shapes can also be used in actual products, and this application embodiment does not impose any particular limitation on this. In some embodiments, the first light-shielding area 1223 and the second light-shielding area 2123 can be arranged in a one-to-one correspondence, thereby expanding the support area at both ends of the support column 32 and improving the stability of the support column 32. In other embodiments, the number of second light-shielding areas 2123 can be less than the number of first light-shielding areas 1223, thereby allowing the pattern of the first light-shielding layer 122 and the pattern of the second light-shielding layer 212 to differ, which can reduce the occurrence of moiré patterns and thus improve display quality.
[0062] The projection area of the second light-shielding layer 212 on the substrate can be located within the projection area of the first light-shielding layer 122 on the substrate. Furthermore, the projection of the central axis of each first black matrix 1221 onto the substrate can coincide with the projection of the central axis of each first light-shielding metal 2121 onto the substrate, and the projection of the central axis of each second black matrix 1222 onto the substrate can coincide with the projection of the central axis of each second light-shielding metal 2122 onto the substrate. That is, the patterns of the first light-shielding layer 122 and the second light-shielding layer 212 can be identical, the width of the first light-shielding metal 2121 is smaller than the width of the first black matrix 1221, and the width of the second light-shielding metal 2122 is smaller than the width of the second black matrix 1222.
[0063] By setting the width of the first light-blocking layer 122 in the first direction to be greater than the width of the second light-blocking layer 212 in the first direction, and aligning it with the central axis of the pattern of the second light-blocking layer 212, it is possible to reduce the mixing of adjacent color-blocking light at a positive viewing angle, while on the one hand reducing the obstruction of light by the second light-blocking layer 212 and increasing the amount of light transmitted through the second color filter layer 21, and on the other hand further reducing the generation of moiré patterns.
[0064] It should be noted that, for different display devices, such as mobile phones, tablets, and laptops, due to differences in display panel size and resolution, the sizes of the first color resist 121 and the second color resist 211, the widths of the first black matrix 1221 and the second black matrix 1222, the widths of the first light-shielding metal 2121 and the second light-shielding metal 2122, and the distance between the first color filter layer 12 and the second color filter layer 21 can be determined according to actual needs. For example, in a thinner mobile phone, the sum of the thicknesses of the first light-shielding layer 122, the first color resist 121, the first planarization layer 4, and the support pillar 32 can be 8 to 12 micrometers.
[0065] When preparing the first color filter layer 12, a first light-shielding layer 122 can be formed first, and then a first color resist 121 can be formed on the first light-shielding layer 122. When preparing the second light-shielding layer 212, in some embodiments, a second color resist 211 can be formed first, and then a metal layer can be formed on the second color resist 211 by physical vapor deposition, followed by an etching process to form the second light-shielding layer 212.
[0066] It is understood that in some embodiments, the area of the first light-shielding metal 2121 and the second light-shielding metal 2122 can be pre-formed above the second color filter 211. A groove can be formed on the upper surface of the second color filter 211 by a first etching process, and then a metal layer can be deposited by a physical vapor deposition process. After the second etching process, only the metal layer above the groove is retained, thereby forming the second light-shielding layer 212. This can reduce the thickness of the first color filter layer 12, thereby reducing the thickness of the display panel.
[0067] See Figure 5 and Figure 6 The first light-shielding metal 2121 and the second light-shielding metal 2122 can define a plurality of rectangular openings for setting the pixel electrode 5. The pixel electrode 5 can drive the liquid crystal molecules 31 of the liquid crystal layer 3 to deflect. The thickness of the pixel electrode 5 can be greater than or equal to the thickness of the second light-shielding layer 212. The specific thickness can be selected according to actual needs, thereby achieving the function of flattening the second light-shielding layer 212.
[0068] The array substrate may further include a thin-film transistor layer 22 and a second planarization layer 23 formed on the thin-film transistor layer 22. In one possible implementation, Figure 7 This is a top view of the second flat layer provided in an embodiment of this application. (See attached diagram.) Figure 7 Multiple opening regions 231 can be etched on the second planarization layer 23. The opening regions 231 can be used to accommodate the third primary color resist 2113. The second planarization layer 23 can form a second transparent color resist 2111 and a third transparent color resist 2112.
[0069] By using an opening region 231 in the second planarization layer 23 to accommodate the third primary color resist 2113, and by using the material of the second planarization layer 23 to form the second transparent color resist 2111 and the third transparent color resist 2112, the thickness of the second color filter layer 21 can be reduced, and the second planarization layer 23 can be reused. This reduces the cost and manufacturing process of additional transparent color resists, thereby improving the manufacturing efficiency.
[0070] The following description, using a specific embodiment, illustrates how the display panel described in this application displays red, green, blue, white, and black images, respectively. The angle range of -25° to 25° represents the viewing angle range when the user views the display panel. A viewing angle greater than 25° is considered a right-hand view, and a viewing angle less than -25° is considered a left-hand view. The example uses a red color filter 1211, a green color filter 1213, and a blue color filter 2113. A grayscale image showing the display effect when the display panel displays the above-mentioned solid color images is provided. Figure 8 As shown.
[0071] When the display panel displays a red image, the liquid crystal molecules 31 below the red color resist are deflected perpendicular to the display panel, while the liquid crystal molecules 31 below the green color resist and above the blue color resist remain unchanged. Refer to [reference needed] when the user views the display panel at a normal viewing angle. Figure 9 After the white light emitted by the backlight passes through the red color filter, only the red light can pass through the red color filter normally, so users can normally view the red picture.
[0072] When the user views the display panel from the left perspective, refer to Figure 10 Because the liquid crystal molecules 31 below the red color resist allow light to pass through, white light, after passing through the second transparent color resist 2111, can pass through the liquid crystal molecules 31 below the red color resist and then enter the green color resist. After passing through the green color resist, green light is emitted from the display panel, resulting in the mixing of red and green light, which makes it difficult for users to see the display screen when viewing the display panel from the left angle.
[0073] When the user views the display panel from the right perspective, refer to Figure 11 Because the liquid crystal molecules 31 below the red color resist allow light to pass through, white light, after passing through the second transparent color resist 2111, can pass through the liquid crystal molecules 31 below the red color resist and enter the first transparent color resist 1212 and exit the display panel, thus causing the red and white light to mix, making it difficult for users to see the display screen when viewing the display panel from the right angle.
[0074] When the display panel displays a green image, the liquid crystal molecules 31 below the green color resist are deflected perpendicular to the display panel, while the liquid crystal molecules 31 below the red color resist and above the blue color resist remain unchanged. Refer to [reference needed] when the user views the display panel at a normal viewing angle. Figure 12 After the white light emitted by the backlight passes through the green color filter, only green light can pass through the green color filter normally, so users can normally view the green screen.
[0075] When the user views the display panel from the left perspective, refer to Figure 13Because the liquid crystal molecules 31 below the green color resist allow light to pass through, after passing through the third transparent color resist 2112, white light can pass through the liquid crystal molecules 31 below the green color resist, enter the first transparent color resist 1212 and exit the display panel, thus causing the white and green light to mix, making it difficult for users to see the display screen when viewing the display panel from the left angle.
[0076] When the user views the display panel from the right perspective, refer to Figure 14 Because the liquid crystal molecules 31 beneath the green color resist allow light to pass through, white light, after passing through the third transparent color resist 2112, can pass through the liquid crystal molecules 31 beneath the green color resist and enter the red color resist, causing red light to exit the display panel. Furthermore, because the transmission spectra of the blue and green color resists overlap, after white light passes through the liquid crystal molecules 31 beneath the blue and green color resists, some blue light will exit the green color resist, resulting in color mixing of green, blue, and red light. This makes the display image unclear when viewed from the right angle.
[0077] When the display panel displays a blue image, the liquid crystal molecules 31 above the blue color resist are deflected perpendicular to the display panel, while the liquid crystal molecules 31 below the red and green color resists are not deflected. Refer to [reference needed] when the user views the display panel at a normal viewing angle. Figure 15 After the white light emitted by the backlight passes through the blue color filter, only the blue light can pass through the green color filter normally, so users can normally view the blue picture.
[0078] When the user views the display panel from the left perspective, refer to Figure 16 Because the liquid crystal molecules 31 below the blue color resist allow light to pass through, white light, after passing through the third transparent color resist 2112, can pass through the liquid crystal molecules 31 above the blue color resist and enter the first transparent color resist 1212 and exit the display panel, thus causing the white light and blue light to mix, making it difficult for users to see the display screen when viewing the display panel from the left angle.
[0079] When the user views the display panel from the right perspective, refer to Figure 17 Because the liquid crystal molecules 31 below the blue color resist allow light to pass through, white light, after passing through the second transparent color resist 2111, can pass through the liquid crystal molecules 31 above the blue color resist and enter the first transparent color resist 1212 before exiting the display panel. Furthermore, after passing through the blue color resist and the liquid crystal molecules 31 above it, some blue light will exit through the green color resist, resulting in color mixing between blue and white light. This makes the display image unclear when viewed from the right angle.
[0080] When the display panel displays a white image, the liquid crystal molecules 31 below the red and green color resists and above the blue color resist are deflected perpendicular to the display panel. When the user views the display panel at a normal viewing angle, refer to... Figure 18 White light passing through the second transparent color resist 2111 is emitted from the display panel after passing through the red color resist. Blue light passing through the blue color resist is emitted from the display panel after passing through the first transparent color resist 1212. White light passing through the third transparent color resist 2112 is emitted from the display panel after passing through the green color resist. Users can see that the display panel displays white normally.
[0081] When the user views the display panel from the left perspective, refer to Figure 19 The white light passing through the third transparent color resist 2112 can pass through the liquid crystal molecules 31 above the blue color resist, enter the first transparent color resist 1212, and exit the display panel. Furthermore, due to the difference in the amount of light emitted from the backlight after passing through the filtering effect of each color resist, the amount of light emitted obliquely from the red color resist, the first transparent color resist, and the green color resist is different, resulting in color mixing. This makes it difficult for the user to see the display screen clearly when viewing the display panel from the left angle.
[0082] When the user views the display panel from the right perspective, refer to Figure 20 The white light, after passing through the blue color resist, passes through the liquid crystal molecules 31 above the blue color resist, then enters the green color resist and exits the display panel. Furthermore, the amount of light emitted obliquely from the red color resist, the first transparent color resist, and the green color resist also differs, resulting in color mixing and making the display image unclear when viewed from the right angle.
[0083] When displaying a black image, the liquid crystal molecules 31 in the liquid crystal layer 3 do not deflect. When the user views the display panel from the normal viewing angle, the image appears black because the liquid crystal layer 3 is opaque. However, when the user views the display panel from the left or right viewing angle, the image does not appear pure black due to light leakage in the liquid crystal display device, making it difficult for the user to see the display clearly from either angle.
[0084] It is understood that the solution described in this application embodiment can also be used in combination with a traditional single-layer color filter layer. For example, the right side of the display panel can use a traditional single-layer color filter layer, while the left side can use the solution described in this application embodiment. In this way, within the normal viewing angle range, the user can normally view the content displayed on the display panel. However, people located on the left side of the display panel cannot see the content displayed on the left side of the display panel, thereby achieving regional privacy protection.
[0085] It is understood that the above description is based on the example of the first color filter layer 12 including red and green color resists and the second color filter layer 21 including blue color resists. In actual products, the red and green color resists can be located in different film layers.
[0086] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features, such as applying the technical solutions to other display devices, such as white organic light-emitting display devices. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
[0087] The display panel provided in this application includes: a color filter substrate, an array substrate, and a liquid crystal layer located between the color filter substrate and the array substrate. The color filter substrate includes a substrate and a first color filter layer formed on the substrate. The first color filter layer includes a plurality of first color resists arranged in an array and a first light-shielding layer located between adjacent first color resists. Each first color resist forms a plurality of color resist units arranged in an array. Each color resist unit includes a first primary color resist, a first transparent color resist, and a second primary color resist arranged along a first direction. A second color filter layer is formed on the side of the array substrate near the liquid crystal layer. The second color filter layer includes a plurality of second color resists arranged in an array and a second light-shielding layer formed between adjacent second color resists. The second color resists correspond one-to-one with the first color resists. Each second color resist includes a second transparent color resist corresponding to the position of the first primary color resist, a third transparent color resist corresponding to the position of the second primary color resist, and a third primary color resist corresponding to the position of the first transparent color resist. This can achieve privacy protection for the display device, improving the user's privacy experience and ease of use.
[0088] Based on the same inventive concept, embodiments of this application also provide a display device. Figure 21 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Figure 21 As shown, the display device may include the display panel 100 and the backlight module 200 described in any of the above embodiments, wherein the backlight module 200 is used to provide a backlight source for the display panel 100.
[0089] Since the display device in this embodiment includes the display panel in the above embodiments, the display device in this embodiment has all the technical features and effects of the above-described display panel embodiments. For details, please refer to the above embodiments, and will not be repeated here.
[0090] It should be understood that in the description of this application and the appended claims, the terms "comprising," "including," "having," and any variations thereof are intended to cover non-exclusive inclusion and mean "including but not limited to," unless otherwise specifically emphasized.
[0091] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is used to describe the relationship between the related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural.
[0092] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items.
[0093] Furthermore, it should be understood in the description of this application that the terms "longitudinal," "horizontal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0094] In this application, unless otherwise expressly specified and limited, the terms "connection" and "linkage" should be interpreted broadly. For example, they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise expressly limited, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0095] Furthermore, in the description of this application and the appended claims, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein; features defined as "first" or "second" may explicitly or implicitly include at least one of those features.
[0096] In the embodiments of this application, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of the words "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.
[0097] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.
Claims
1. A display panel, characterized in that, include: Color filter substrate, array substrate, and liquid crystal layer located between the color filter substrate and the array substrate; The color filter substrate includes a substrate and a first color filter layer formed on the substrate. The first color filter layer includes a plurality of first color resists arranged in an array and a first light-shielding layer located between adjacent first color resists. Each first color resist forms a plurality of color resist units arranged in an array. Each color resist unit includes a first primary color resist, a first transparent color resist, and a second primary color resist arranged along a first direction. A second color filter layer is formed on the side of the array substrate close to the liquid crystal layer. The second color filter layer includes a plurality of second color resists arranged in an array and a second light-shielding layer formed between adjacent second color resists. The second color resists correspond one-to-one with the first color resists. Each second color resist includes a second transparent color resist corresponding to the position of the first primary color resist, a third transparent color resist corresponding to the position of the second primary color resist, and a third primary color resist corresponding to the position of the first transparent color resist. The projection area of the second light-shielding layer on the substrate is located within the projection area of the first light-shielding layer on the substrate. The first light-shielding layer includes a plurality of first black matrices extending along a first direction, and the second light-shielding layer includes a plurality of first light-shielding metals extending along the first direction. The projection of the central axis of each first black matrix on the substrate coincides with the projection of the central axis of each first light-shielding metal on the substrate. The width of the first light-shielding metal is smaller than the width of the first black matrix. The array substrate further includes a thin-film transistor layer and a second planarization layer formed on the thin-film transistor layer. The second planarization layer is etched with a plurality of opening regions for accommodating the third primary color resist. The material of the second planarization layer directly forms the second transparent color resist and the third transparent color resist.
2. The display panel according to claim 1, characterized in that, The first light-shielding layer and the second light-shielding layer satisfy the following: the angle range of α is 20°~65°, tanα = H / (A+B); Where H represents the distance between the first light-shielding layer and the second light-shielding layer, A represents half the width of the first light-shielding layer, and B represents half the width of the second light-shielding layer.
3. The display panel according to claim 1, characterized in that, The liquid crystal layer includes support pillars; The first light-shielding layer further includes multiple second black matrices arranged at intervals and extending along a first direction. The first black matrices and the second black matrices are intersected, and a first light-shielding area for blocking the support column is provided at a portion of the intersection of the first black matrices and the second black matrices. The second light-shielding layer further includes multiple second light-shielding metals arranged at intervals and extending along a first direction. The first light-shielding metals and the second light-shielding metals are intersected, and a second light-shielding area for blocking the support column is provided at a portion of the intersection of the first light-shielding metals and the second light-shielding metals.
4. The display panel according to claim 3, characterized in that, The first light-shielding metal and the second light-shielding metal define a plurality of rectangular openings for setting pixel electrodes, wherein the thickness of the pixel electrodes is greater than or equal to the thickness of the second light-shielding layer.
5. The display panel according to claim 3, characterized in that, The lower surface of the first color filter layer is provided with a first flat layer, and the two ends of the support column abut between the first flat layer and the second light-shielding layer.
6. The display panel according to claim 3, characterized in that, The projection shapes of the first light-shielding area and the second light-shielding area on the substrate are rectangular.
7. The display panel according to claim 4, characterized in that, The projection of the central axis of each of the second black matrices onto the substrate coincides with the projection of the central axis of each of the second light-shielding metals onto the substrate.
8. The display panel according to any one of claims 1-7, characterized in that, The first primary color resist, the second primary color resist, and the third primary color resist are all different in color but the same in size and shape.
9. A display device, characterized in that, include: A backlight module and a display panel as described in any one of claims 1-8, wherein the backlight module is used to provide a backlight source for the display panel.