Display panels and 3D printing systems

Abstract

The present invention discloses a display panel and a 3D printing system. The display panel includes a plurality of pixels, and the pixel includes at least one first electrode, the first electrode includes a slit and an electrode strip extending along a first direction, the slit and the electrode strip are alternately arranged in a second direction, and the first direction intersects with the second direction; the first electrode includes a first area and two second areas, and in the second direction, the first area is located between the two second areas; the width of the slit in the first area is different from the width of the slit in the second area, and / or the width of the electrode strip in the first area is different from the width of the electrode strip in the second area. The present invention is aimed at the printing requirements of different products, and can reduce the printing step formed at the junction of layers, so that the junction of printed products is smoother and the printing effect is improved.

Description

[0001] This application is a divisional application with the application date of August 2, 2018, application number 201810872535.6, and invention name “Display panel and 3D printing system”. Technical Field

[0002] The present invention relates to the field of display technology, and more specifically, to a display panel and a 3D printing system. Background Art

[0003] Among the existing display panel technologies, display panels are mainly divided into two mainstream technologies: liquid crystal display panels and organic self-luminous display panels. Among them, the liquid crystal display panel forms an electric field that can control the deflection of liquid crystal molecules by applying voltage to the pixel electrode and the common electrode, thereby controlling the transmission of light to realize the display function of the display panel; the organic self-luminous display panel uses organic electroluminescent materials. When current passes through the organic electroluminescent materials, the luminescent materials will emit light, thereby realizing the display function of the display panel.

[0004] In the related art, a liquid crystal display panel can be used as a photomask for 3D printing. The image to be printed is displayed on the display panel. The light emitted by the light source passes through the liquid crystal display panel and irradiates the photosensitive material of the solidified target part on the photosensitive material. The image on the liquid crystal display panel can produce a transmittance difference by grayscale control of liquid crystal deflection, so that the solidified photosensitive material produces different shapes, realizing the function of 3D printing. When the display panel is applied to 3D printing technology, geometric entities are printed layer by layer. At the junction of the pixel display edge and the opaque area, it is equivalent to one side being a light area and the other side being a lightless area. There is a brightness difference between the pixel display edge and the opaque area. Since the photosensitive material is sensitive to changes in light intensity, it is easy to form a printing step at the junction of each layer, affecting the printing effect.

[0005] Therefore, providing a display panel and a 3D printing system that can improve printing steps is a technical problem that needs to be urgently solved in the field. Summary of the invention

[0006] In view of this, the present invention provides a display panel and a 3D printing system, which solve the technical problem of improving the printing step.

[0007] In a first aspect, the present invention provides a display panel, comprising a plurality of pixels, wherein the pixel comprises at least one first electrode, wherein the first electrode comprises slits and electrode strips extending along a first direction, wherein the slits and the electrode strips are alternately arranged in a second direction, and the first direction intersects the second direction;

[0008] The first electrode comprises a first region and two second regions, and in the second direction, the first region is located between the two second regions;

[0009] The width of the slit in the first area is different from the width of the slit in the second area, and / or the width of the electrode strip in the first area is different from the width of the electrode strip in the second area.

[0010] In a second aspect, based on the same inventive concept, the present invention further provides a 3D printing system, comprising any display panel proposed in the present invention.

[0011] Compared with the prior art, the display panel and 3D printing system provided by the present invention achieve at least the following beneficial effects:

[0012] In the display panel provided by the present invention, the width of the slit in the first area of ​​the first electrode is different from the width of the slit in the second area, and / or the width of the electrode strip in the first area is different from the width of the electrode strip in the second area. By designing the widths of the slits and the electrode strips in the first electrode, it is possible to achieve different electric field strengths in the areas corresponding to the first area and the second area, thereby achieving different deflection rates of liquid crystal molecules, and further achieving different light transmittances in the corresponding areas in the opening area of ​​the pixel, that is, achieving different luminous brightness in the middle of the pixel and on both sides of the pixel. When used in a 3D printing system, the photosensitive material receives a higher light brightness and a faster curing speed, while the photosensitive material receives a lower light brightness and a slower curing speed. The present invention can reduce the printing steps formed at the junction of layers according to the printing requirements of different products, so that the junction of the printed product is smoother and the printing effect is improved.

[0013] Of course, any product implementing the present invention does not necessarily need to achieve all of the technical effects described above at the same time.

[0014] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0016] Figure 1 A schematic top view of a display panel provided by an embodiment of the present invention;

[0017] Figure 2 A diagram showing the film layer structure of a display panel provided by an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of an optional implementation of the first electrode provided in an embodiment of the present invention;

[0019] Figure 4A schematic diagram of another optional implementation of the first electrode provided in an embodiment of the present invention;

[0020] Figure 5 A schematic cross-sectional view of an optional implementation of a display panel provided in an embodiment of the present invention;

[0021] Figure 6 A top view of a wire grid polarizer provided by an embodiment of the present invention;

[0022] Figure 7 A schematic diagram of another optional implementation of the first electrode provided in an embodiment of the present invention;

[0023] Figure 8 A schematic diagram of another optional implementation of the first electrode provided in an embodiment of the present invention;

[0024] Fig. 9 A schematic diagram of another optional implementation of the first electrode provided in an embodiment of the present invention;

[0025] Fig.10 A schematic diagram of another optional implementation of the first electrode provided in an embodiment of the present invention;

[0026] Fig.11 A schematic diagram of another optional implementation of the first electrode provided in an embodiment of the present invention;

[0027] Fig.12 A schematic top view of an optional implementation of a display panel provided in an embodiment of the present invention;

[0028] Fig.13 A schematic diagram of a 3D printing system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] Figure 1 A schematic top view of a display panel provided by an embodiment of the present invention. Figure 2 A diagram showing the film layer structure of a display panel provided in an embodiment of the present invention. Figure 3 A schematic diagram of an optional implementation of the first electrode provided in an embodiment of the present invention. Figure 4 A schematic diagram of another optional implementation of the first electrode provided in an embodiment of the present invention.

[0035] like Figure 1 As shown, the display panel provided by the present invention includes a plurality of pixels p, Figure 1 The shape and arrangement of the pixels p are only schematic representations.

[0036] like Figure 2 As shown, the display panel includes an array substrate 101, an opposing substrate 102, and a liquid crystal molecule layer 103. The array substrate 101 may include a first substrate 1011 and a thin film transistor T located on the first substrate 1011. The thin film transistor T serves as a switching device for displaying a pixel p in the display panel. The opposing substrate 102 may include a second substrate 1021 and a black matrix BM, wherein the black matrix BM divides the display panel into a plurality of pixels p, and the area surrounded by the black matrix BM is an opening area of ​​the pixel p. The light is emitted from the opening area of ​​the pixel p to realize the light emission of the pixel p. The edge of the pixel p display is adjacent to the opaque area (black matrix BM), and the light cannot penetrate the opaque area. The display panel may also include a pixel electrode and a common electrode. By applying a voltage to the pixel electrode and the common electrode, an electric field for controlling the deflection of the liquid crystal molecules is formed. By controlling the deflection rate of the liquid crystal molecules, the penetration rate of the light penetrating the liquid crystal molecule layer is controlled, and the light is emitted from the opening area of ​​the pixel p to realize the control of the gray scale displayed by the pixel p. Figure 2 The positions of the pixel electrode and the common electrode are not shown. The pixel electrode and the common electrode may be both located on the array substrate, and a horizontal electric field is formed after a voltage is applied to control the deflection of the liquid crystal molecules. Alternatively, the pixel electrode is located on the array substrate, and the common electrode is located on the opposite substrate, and a vertical electric field is formed after a voltage is applied to control the deflection of the liquid crystal molecules. The thin film transistor T in the array substrate 101 may include an active layer T1, a gate electrode T2, a source electrode T3, and a drain electrode T4. Figure 2 In the figure, only the thin film transistor T with a top gate structure is shown, and the thin film transistor T in the present invention may also be a bottom gate structure.

[0037] The pixel in the display panel provided by the present invention includes at least one first electrode. Optionally, in the display panel provided by the present invention, a common electrode can be set as the first electrode; or a pixel electrode can be set as the first electrode; or both the pixel electrode and the common electrode can be set as the first electrode. In the same first electrode, the arrangement of the slits and the electrode strips in the two second regions can be the same or different. In practice, it can be determined according to the specific product design requirements.

[0038] Also refer to Figure 3 and Figure 4 As shown, the first electrode D includes a slit 11 and an electrode strip 22 extending along a first direction x, the slit 11 and the electrode strip 22 are alternately arranged in a second direction y, and the first direction x intersects with the second direction y; the first electrode D includes a first area A1 and two second areas A2, and in the second direction y, the first area A1 is located between the two second areas A2; the width S of the slit 11 in the first area A1 is different from the width S of the slit 11 in the second area A2, and / or the width W of the electrode strip 22 in the first area A1 is different from the width W of the electrode strip 22 in the second area A2. Figure 3 and Figure 4 The shape of the first electrode D is only schematically indicated. In actual products, the shape of the first electrode D may also be an irregular pattern. The number of slits 11 and electrode strips 22 in the first area A1 and the second area A2 is also only schematically indicated.

[0039] There are many situations for disposing the slits 11 and the electrode strips 22 in the first electrode D. In the first area A1 and the second area A2 of the first electrode D, only the width of the slits 11 may be different, only the width of the electrode strips 22 may be different, or both the widths of the slits 11 and the electrode strips 22 may be different.

[0040] In the first electrode D, the width S of the slit 11 in the second area A2 may be greater than the width S of the slit 11 in the first area A1, and / or the width W of the electrode strip 22 in the second area A2 may be greater than the width W of the electrode strip 22 in the first area A1. Figure 3 As shown, it shows the situation that the width S of the slit 11 in the second area A2 is greater than the width S of the slit 11 in the first area A1, and the width W of the electrode strip 22 in the second area A2 is greater than the width W of the electrode strip 22 in the first area A1.

[0041] In the first electrode D, the width S of the slit 11 in the second area A2 may be smaller than the width S of the slit 11 in the first area A1, and / or the width W of the electrode strip 22 in the second area A2 may be smaller than the width W of the electrode strip 22 in the first area A1. Figure 4As shown, it shows the situation that the width S of the slit 11 in the second area A2 is smaller than the width S of the slit 11 in the first area A1, and the width W of the electrode strip 22 in the second area A2 is smaller than the width W of the electrode strip 22 in the first area A1.

[0042] In the display panel provided by the present invention, the width of the slit in the first area of ​​the first electrode is different from the width of the slit in the second area, and / or the width of the electrode strip in the first area is different from the width of the electrode strip in the second area. By designing the width of the slit and the electrode strip in the first electrode, the electric field strength generated in the areas corresponding to the first area and the second area can be different, so that the deflection rate of the liquid crystal molecules is different, and then the light transmittance in the corresponding area in the opening area of ​​the pixel is different. Then the luminous brightness of the middle of the pixel and the two sides of the pixel are different. When applied to the 3D printing system, the photosensitive material receives a large light brightness, the curing speed is fast, and the photosensitive material receives a small light brightness, The curing speed is slow. The present invention can reduce the printing step formed at the junction of layers according to the printing requirements of different products, so that the junction of the printed product is smoother and the printing effect is improved.

[0043] The width of the slit in the second area is greater than the width of the slit in the first area, and / or the width of the electrode strip in the second area is greater than the width of the electrode strip in the first area. When the pixel is displayed (i.e., luminous), the electric field strength formed by the second area is less than the electric field strength formed by the first area, and the deflection rate of the liquid crystal molecules corresponding to the second area is less than the deflection rate of the liquid crystal molecules corresponding to the first area, that is, the brightness on both sides of the pixel in the second direction is less than the brightness in the middle of the pixel. When applied to a 3D printing system, when printing products layer by layer, for products that require a slow curing speed in the middle (referring to the middle of the printed layer of the printed product) and a slow curing speed at the edge (referring to the edge of the printed layer of the printed product), it is beneficial to reduce the printing step formed at the junction of the layers, making the junction of the printed product smoother.

[0044] The width of the slit in the second area is smaller than the width of the slit in the first area, and / or the width of the electrode strip in the second area is smaller than the width of the electrode strip in the first area. When the pixel is luminous, the electric field strength formed by the second area is greater than the electric field strength formed by the first area, and the deflection rate of the liquid crystal molecules corresponding to the second area is greater than the deflection rate of the liquid crystal molecules corresponding to the first area, that is, the brightness on both sides of the pixel in the second direction is greater than the brightness in the middle of the pixel. When applied to a 3D printing system, when printing products layer by layer, for products that require a slow curing speed in the middle and a fast curing speed at the edge, it is helpful to reduce the printing step formed at the junction of layers, making the junction of the printed product smoother.

[0045] Optionally, the display panel provided by the present invention may include a blue color resist layer. When the display panel is used in a 3D printing system, the light source in the 3D printing system is usually a near-ultraviolet short wave with a wavelength of 385nm-420nm. The green color resist and red color resist commonly used in the prior art have a large degree of absorption for the near-ultraviolet short wave, and this band can hardly penetrate the green color resist and the red color resist. The blue color resist has a higher transmittance for the near-ultraviolet short wave band. The display panel provided by an embodiment of the present invention may only be provided with a blue color resist layer to improve the transmittance of the display panel for the near-ultraviolet short wave band, thereby reducing power consumption. Optionally, the display panel provided by the present invention may not be provided with a color resist layer to improve the transmittance of the display panel for the near-ultraviolet short wave band, thereby reducing power consumption.

[0046] Figure 5 A schematic cross-sectional view of an optional implementation of a display panel provided in an embodiment of the present invention. Figure 5 As shown, the display panel further includes a wire grid polarizer, and the wire grid polarizer includes an upper wire grid polarizer 1041 and a lower wire grid polarizer 1042. The upper wire grid polarizer 1041 is located on a side of the opposing substrate 102 away from the array substrate 101, and the lower wire grid polarizer 1042 is located on a side of the array substrate 101 away from the opposing substrate 102. The upper wire grid polarizer 1041 and the lower wire grid polarizer 1042 both include a plurality of parallelly distributed metal bars, and the extension direction of the metal bars in the upper wire grid polarizer 1041 and the extension direction of the metal bars in the lower wire grid polarizer 1042 are perpendicular to each other, so that the polarization directions of the upper wire grid polarizer 1041 and the lower wire grid polarizer 1042 are perpendicular, so that the display panel can display in a black state. Among them, the structures of the upper wire grid polarizer 1041 and the lower wire grid polarizer 1042 can be as follows Figure 6 shown.

[0047] Figure 6 A top view of a wire grid polarizer provided by an embodiment of the present invention, such as Figure 6As shown, the wire grid polarizer has a plurality of parallel metal bars 14, and the metal bars 14 are equally spaced and parallel. The metal bars 14 are located on the surface of the substrate 15. The substrate 15 can be the above-mentioned array substrate 101 or the opposing substrate 102. In the embodiment of the present invention, a wire grid polarizer is used to replace the traditional organic iodine polarizer, and the upper wire grid polarizer 1041 and the lower wire grid polarizer 1042 are both metal wire grid polarizers composed of parallel metal bars. Under the oscillation of free electrons on the surface of the metal bars, the light of the electric field vector component vibrating parallel to the surface of the polarizer is almost completely reflected, and the light of the electric field vector component perpendicular to the surface of the metal bars is almost completely transmitted. The application in the 3D printing system solves the problem of strong absorption of the ultraviolet short wave band 385nm-420nm by the traditional organic iodine polarizer, can improve the transmittance of the display panel to the near ultraviolet short wave band of 385nm-420nm, reduce the power consumption of 3D printing, and improve the efficiency of 3D printing.

[0048] In one embodiment, in a first electrode: in the direction from the second area to the first area, the width of the slit gradually decreases, and / or the width of the electrode strip gradually decreases. It can be that in the direction from the second area to the first area, the width of the slit gradually decreases, and the width of the second area and the first inner electrode strip is the same; it can also be that in the direction from the second area to the first area, the width of the electrode strip gradually decreases, and the width of the second area and the first inner slit is the same; it can also be that in the direction from the second area to the first area, the width of the slit gradually decreases, and the width of the electrode strip also gradually decreases.

[0049] like Figure 7 As shown, Figure 7 This is another optional implementation diagram of the first electrode provided in an embodiment of the present invention. It is taken as an example that the width S of the slit 11 gradually decreases and the width W of the electrode strip 22 gradually decreases in the direction from the second area A2 to the first area A1.

[0050] In the display panel provided by this embodiment, the width of the slit in the second area is greater than the width of the slit in the first area, and / or the width of the electrode strip in the second area is greater than the width of the electrode strip in the first area. When the pixel is emitting light, the brightness on both sides of the pixel in the second direction is less than the brightness in the middle of the pixel. This is equivalent to being able to reduce the difference in brightness between the edge of the pixel display and the opaque area. When applied to a 3D printing system, when printing products layer by layer, for products that require a fast curing speed in the middle and a slow curing speed at the edge, it is beneficial to reduce the printing steps formed at the junction of layers and improve the printing effect. In addition, in the direction from the second area to the first area, the width of the slit gradually decreases, and / or the width of the electrode strip gradually decreases. When the pixel emits light, the luminous intensity gradually changes from both sides of the pixel to the center of the pixel, that is, the light intensity on the photosensitive material irradiated by the light emitted by the pixel also gradually changes, and the product part printed in the photosensitive material area irradiated by the pixel is also relatively smooth.

[0051] In one embodiment, in a first electrode: in the direction from the second area to the first area, the width of the slit gradually increases, and / or the width of the electrode strip gradually increases. It can be that in the direction from the second area to the first area, the width of the slit gradually increases, and the width of the second area and the first inner electrode strip is the same; it can also be that in the direction from the second area to the first area, the width of the electrode strip gradually increases, and the width of the second area and the first inner slit is the same; it can also be that in the direction from the second area to the first area, the width of the slit gradually increases, and the width of the electrode strip also gradually increases.

[0052] like Figure 8 As shown, Figure 8 Another optional implementation diagram of the first electrode provided in an embodiment of the present invention is shown in FIG.

[0053] In the display panel provided by this embodiment, the width of the slit in the second area is smaller than the width of the slit in the first area, and / or the width of the electrode strip in the second area is smaller than the width of the electrode strip in the first area. When the pixel emits light, the brightness on both sides of the pixel in the second direction is greater than the brightness in the middle of the pixel. When applied to a 3D printing system, when printing products layer by layer, for products that require a slow curing speed in the middle and a fast curing speed at the edge, it is beneficial to reduce the printing steps formed at the junction of layers. In addition, in the direction from the second area to the first area, the width of the slit gradually increases, and / or the width of the electrode strip gradually increases. When the pixel emits light, the luminous intensity gradually changes from both sides of the pixel to the center of the pixel, that is, the light intensity on the photosensitive material irradiated by the light emitted by the pixel also gradually changes, and the product part printed in the photosensitive material area irradiated by the pixel is also relatively smooth.

[0054] like Fig. 9As shown Fig. 9 This is a schematic diagram of another alternative embodiment of the first electrode provided by an embodiment of the present invention. The slit includes a first slit 111 and a second slit 112, and the electrode strip includes a first electrode strip 221 and a second electrode strip 222. The first slit 111 and the first electrode strip 221 are located in the second region A2, and the second slit 112 and the second electrode strip 222 are located in the first region A1; the width of the first slit 111 is S1, the width of the first electrode strip 221 is W1, the width of the second slit 112 is S2, and the width of the second electrode strip 222 is W2, where 1 < S1 / S2 ≤ 2, and / or, 1 < W1 / W2 ≤ 2. The number of the second slit and the second electrode strip in the first region and the number of the first slit and the first electrode strip in the second region are not limited. In this embodiment, the first slit and the first electrode strip are arranged in the second region, the second slit and the second electrode strip are arranged in the first region, the width of the first slit is greater than the width of the second slit, and the width of the first electrode strip is greater than the width of the second electrode strip. When the pixel emits light, the brightness on both sides of the pixel in the second direction is less than the brightness in the middle of the pixel. When applied to layer-by-layer printing of products in a 3D printing system, for products that require a fast curing speed in the middle and a slow curing speed at the edges, it is beneficial to reduce the printing steps formed at the junction of layers. In addition, in this embodiment, 1 < S1 / S2 ≤ 2, and / or, 1 < W1 / W2 ≤ 2. In practice, it can be designed according to the specific size and requirements of the first electrode to ensure that the ratio of S1 to S2 and the ratio of W1 to W2 are not too large, that is, the difference between the width of the first slit and the width of the second slit is not particularly large, and the difference between the width of the first electrode strip and the width of the second electrode strip is not particularly large, so as to avoid a significant difference in the light emission intensity between both sides and the center of the pixel when the pixel emits light, that is, the light intensity on the photosensitive material irradiated by the light emitted by the pixel also has a significant difference, thereby avoiding large printing streaks in the product printed in the photosensitive material area irradiated by one pixel.

[0055] As Fig.10 shown Fig.10Schematic diagram of another alternative embodiment of the first electrode provided by the embodiment of the present invention. The slit includes a third slit 113 and a fourth slit 114, and the electrode strip includes a third electrode strip 223 and a fourth electrode strip 224. The third slit 113 and the third electrode strip 223 are located in the second region A2, and the fourth slit 114 and the fourth electrode strip 224 are located in the first region A1; the width of the third slit 113 is S3, the width of the fourth slit 114 is S4, the width of the third electrode strip 223 is W3, and the width of the fourth electrode strip 224 is W4, where 1 < S4 / S3 ≤ 2, and / or, 1 < W4 / W3 ≤ 2. The number of the fourth slit and the fourth electrode strip in the first region and the number of the third slit and the third electrode strip in the second region are not limited. In this embodiment, the third slit and the third electrode strip are arranged in the second region, the fourth slit and the fourth electrode strip are arranged in the first region, the width of the fourth slit is greater than that of the third slit, and the width of the fourth electrode strip is greater than that of the third electrode strip. When the pixel emits light, the brightness on both sides of the pixel in the second direction is greater than the brightness in the middle of the pixel. When applied in a 3D printing system and printing a product layer by layer, for a product that requires a slow curing speed in the middle and a fast curing speed at the edge, it is beneficial to reduce the printing steps formed at the junction of layers, making the junction of the printed product smoother. In addition, in this embodiment, 1 < S4 / S3 ≤ 2, and / or, 1 < W4 / W3 ≤ 2. In practice, it can be designed according to the specific size and requirements of the first electrode to ensure that the ratio of S3 to S4 and the ratio of W3 to W3 are not too large, that is, the difference between the width of the third slit and the width of the fourth slit is not particularly large, and the difference between the width of the third electrode strip and the width of the fourth electrode strip is not particularly large, so as to avoid an obvious difference in the light emission intensity between both sides and the center of the pixel when the pixel emits light, that is, the light intensity on the photosensitive material irradiated by the light emitted by the pixel also has an obvious difference, and further avoid a large printing pattern in the area of the photosensitive material irradiated by one pixel.

[0056] By designing the first electrode of the pixel, the display panel provided by the present invention realizes different deflection rates of the liquid crystal molecules controlled by the electric fields formed by the first region and the second region, and further realizes different emission brightnesses of the opening regions corresponding to the first region and the opening regions corresponding to the second region in the pixel. This kind of design will cause a certain loss in the transmittance of the light in the opening region of the pixel. Therefore, in order to reduce the loss of transmittance, the inventor further proposes a display panel. As Fig.11 shown, Fig.11Schematic diagram of another optional implementation of the first electrode provided in an embodiment of the present invention. In a first electrode D: the second area A2 is composed of a first slit 111 and a first electrode strip 221. In this implementation, only one first slit and one first electrode strip are provided in the second area, so that when the pixel is emitting light, the brightness of the light-emitting area corresponding to the second area is less than the brightness of the light-emitting area corresponding to the first area. When applied to a 3D printing system, when printing products layer by layer, for products that require a fast curing speed in the middle and a slow curing speed at the edge, it is beneficial to reduce the printing steps formed at the junction of layers. While this implementation reduces the brightness of the edge area of ​​the pixel to improve the printing step problem, for pixels of a fixed size, only one first slit and a first electrode strip are provided in the second area, which results in a small loss in the overall transmittance of the pixel, ensuring that the power consumption of the display panel is less affected.

[0057] Continue to refer Fig.11 As shown, in the first area A1 , the width S of each slit 11 is the same, and the width W of each electrode strip 22 is the same. Fig.11 The number of slits 11 and electrode strips 22 in the first area A1 is only schematically indicated. In this embodiment, when designing the first electrode, only the size of one electrode strip and one slit at both ends of the first electrode needs to be specially designed. The slit width in the middle area of ​​the electrode is the same, and the electrode strip width is the same, which is conducive to simplifying the manufacturing process. In addition, this embodiment only changes the size of the slit and electrode strip at both ends of the first electrode to reduce the printing step formed at the junction of the layers. When targeting pixels of a fixed size, the overall transmittance loss of the pixel is minimized, ensuring the minimum impact on the power consumption of the display panel.

[0058] like Fig.12 As shown, Fig.12 A schematic top view of an optional implementation of a display panel provided in an embodiment of the present invention. The shape of the opening area of ​​the pixel p includes a square. In the related art, the shape of the pixel opening area is a rectangle. When applied to a 3D printing system, due to the poor viewing angle transmission symmetry of the rectangle, the black state light leakage is uneven at a large viewing angle in the four directions of the left, right, up and down of the panel. In the present invention, the shape of the pixel opening area is designed to be a square, the viewing angle transmission symmetry of the pixel is good, and the light leakage at the four corners of the pixel is uniform at a large viewing angle. When applied to a 3D printing system, grayscale correction in different directions can be achieved, and the symmetry is good when printing products with tiny details, which can ensure the fineness of the printing, and can print products with high fineness requirements such as jewelry wax models and dental models.

[0059] Continue to refer Fig.12As shown, the black matrix BM surrounds the opening area of ​​the pixel p. The black matrix BM includes a plurality of first strip portions BM1 extending along the third direction e and a plurality of second strip portions BM2 extending along the fourth direction f. The first strip portion BM1 and the second strip portion BM2 intersect to form a plurality of square opening areas. The width d1 of the first strip portion BM1 along the fourth direction f is equal to the width d2 of the second strip portion BM2 along the third direction e. Optionally, the first direction x is parallel to the third direction e, and the second direction y is parallel to the fourth direction f. It can also be that the first direction x is parallel to the fourth direction f, and the second direction y is parallel to the third direction e. This embodiment ensures that the pixels are arranged in an array in the display panel, the opening area of ​​the pixels is square, and the spacing between two adjacent pixels is equal. The overall pixel symmetry of the display panel is good, and grayscale correction in different directions can be achieved during 3D printing.

[0060] In the display panel provided in the embodiment of the present invention, the material of the black matrix BM includes a non-metallic light-absorbing material. The non-metallic light-absorbing material may include a black organic material, a modified organic material, or a photochromic material or other light-absorbing material. The non-metallic material is used to space each pixel, and when applied, the metal material is used to avoid the reflection of the light emitted by the backlight source, causing light divergence and reducing the collimation. This implementation method can ensure the printing contrast.

[0061] Continue to refer Figure 2 As shown, the active layer of the thin film transistor of the array substrate of the present invention is made of amorphous silicon material, polycrystalline silicon material or metal oxide material. Optionally, the active layer of the thin film transistor is made of amorphous silicon material. The use of amorphous silicon material has low production cost and high product yield.

[0062] In the related art, the display panel usually includes at least three sub-pixels of red, green and blue as a pixel. Each sub-pixel needs to be provided with its own thin film transistor driving circuit. One pixel needs at least three thin film transistor driving circuits. The number of thin film transistors provided in the array substrate is relatively large. Since the thin film transistors made of polycrystalline silicon material have strong driving ability and small size (occupying small space), polycrystalline silicon material is usually selected to make the active layer of the thin film transistor. The display panel provided by the present invention does not distinguish between sub-pixels of different colors. One pixel of the present invention is equivalent to three sub-pixels in the related art. While ensuring the same resolution as in the related art, the number of thin film transistor driving circuits provided in the array substrate is significantly reduced. The present invention can use amorphous silicon materials with larger device size but low manufacturing cost to make thin film transistors. While ensuring the pixel resolution of the display panel, it is also beneficial to save costs and ensure product yield.

[0063] Based on the same inventive concept, the present invention also provides a 3D printing system. Fig.13Schematic diagram of a 3D printing system provided by an embodiment of the present invention. Fig.13 As shown, the 3D printing system includes a display panel 100 provided in an embodiment of the present invention. The 3D printing system also includes a liquid photosensitive material located in a reagent tank 13a and a carrier device 13b. The liquid photosensitive material may be a liquid photosensitive resin. The 3D printing system also includes a backlight module 200, which is located on a side of the array substrate 101 away from the liquid crystal molecule layer 103; the backlight module 100 includes a backlight source, and the wavelength of light emitted by the backlight source is λ, wherein 385nm≤λ≤420nm.

[0064] The display panel 100 displays images of different cross-sections of the target to be printed; the light beam emitted from the image is used to solidify the preset area of ​​the liquid photosensitive material. The wavelength of the light emitted from the image is 385nm-420nm near-ultraviolet short-wave band. The carrier 13b is located in the liquid photosensitive material, and the solidified photosensitive material is fixed on the carrier 13b. The carrier 13b is used to move in the direction z based on the display timing of the display panel 100, and the direction z is the same as the light beam emission direction of the display panel. Fig.13 As shown, the display panel 100 can be located directly below the liquid photosensitive material and illuminated vertically upward. In other embodiments, it can also be located directly above the liquid photosensitive material and illuminated vertically downward, or located on the side of the liquid photosensitive material and illuminated horizontally. Different illumination directions need to correspond to the movement direction of the carrier 13b.

[0065] It can be seen from the above embodiments that the display panel and 3D printing system provided by the present invention achieve at least the following beneficial effects:

[0066] In the display panel provided by the present invention, the width of the slit in the first area of ​​the first electrode is different from the width of the slit in the second area, and / or the width of the electrode strip in the first area is different from the width of the electrode strip in the second area. By designing the widths of the slits and the electrode strips in the first electrode, it is possible to achieve different electric field strengths in the areas corresponding to the first area and the second area, thereby achieving different deflection rates of liquid crystal molecules, and further achieving different light transmittances in the corresponding areas in the opening area of ​​the pixel, that is, achieving different luminous brightness in the middle of the pixel and on both sides of the pixel. When used in a 3D printing system, the photosensitive material receives a higher light brightness and a faster curing speed, while the photosensitive material receives a lower light brightness and a slower curing speed. The present invention can reduce the printing steps formed at the junction of layers according to the printing requirements of different products, so that the junction of the printed product is smoother and the printing effect is improved.

[0067] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display panel, characterized in that: Comprising: A plurality of pixels, the pixels including at least one first electrode, the first electrode including slits extending in a first direction and electrode strips, the slits and the electrode strips being alternately arranged in a second direction, the first direction intersecting the second direction; The first electrode includes a first region and two second regions, and in the second direction, the first region is located between the two second regions; The width of the slits in the first region is different from the width of the slits in the second region, and / or the width of the electrode strips in the first region is different from the width of the electrode strips in the second region; In one of the first electrodes: In the direction from the second region to the first region, the width of the slits gradually decreases, and / or the width of the electrode strips gradually decreases; In the first region, the widths of the respective slits are the same, and the widths of the respective electrode strips are the same; The slits include a first slit and a second slit, the electrode strips include a first electrode strip and a second electrode strip, the first slit and the first electrode strip are located in the second region, and the second slit and the second electrode strip are located in the first region; The width of the first slit is S1, the width of the first electrode strip is W1, the width of the second slit is S2, and the width of the second electrode strip is W2, where 1 < S1 / S2 ≤ 2, and / or 1 < W1 / W2 ≤ 2; In one of the first electrodes: The second region is composed of one of the first slits and one of the first electrode strips.

2. The display panel according to claim 1, wherein The shape of the opening region of the pixel includes a square.

3. The display panel according to claim 2, characterized in that: Further comprising: A black matrix surrounding the opening region of the pixel.

4. The display panel according to claim 3, wherein The material of the black matrix includes a non-metallic light-absorbing material.

5. A 3D printing system, characterized in that: A display panel including any one of claims 1-4.

Images