TW202107130A - Front light plate with mixed dots - Google Patents

Abstract

A front light plate with mixed dots is disclosed. The front light plate includes a light incident surface, a light exiting surface, a bottom surface, a plurality of collimated dots and a plurality of light extraction dots. The light incident surface is vertically adjacent and connected to the light exiting surface and the bottom surface. The bottom surface or the light exiting surface defines a first dot lying area and a second dot lying area　near the light incident surface, which partially overlap with each other to form a dots offset area. The collimated dots are disposed in the first dot lying area. The light extraction dots are disposed in the second dot lying area, and the angle between the line segment corresponding to the surround wall surface of the cut surface and the axis of the collimated dots is larger than the angle between the line segment corresponding to the surround wall surface of the cut surface and the axis of the light extraction dots. The collimated dots and the light extraction dots in the dots offset area doped to each other. Thereby, the hot spot near the light incident surface is reduced.

Description

Front light board with mixed dots

The present invention is related to the field of light guide elements, especially a front light plate with mixed dots.

Based on its excellent optical adjustment performance, the light guide plate is now widely used in the display field as a light source. The light guide plate is generally used with a point light source such as an LED. When the light from the point light source enters the light guide plate, it is guided by the light guide plate to form a planar light output for display panels that cannot emit light by themselves. The light guide plate can be divided into two types, front light plate and backlight plate, according to the display panel of the matching application and the use method. The front light plate is a light guide element that is installed in front of the display panel and can be directly viewed by the user, and the backlight plate is The light guide element located behind the display panel.

Although both the front light board and the back light board are light guide plates, the development directions of the two are quite different based on the completely different installation methods and applications. In the case of backlight panels, the primary requirement for light output design is to provide uniform and sufficient brightness of the light output. Therefore, most of the current methods are achieved by adjusting the size, shape or layout of the dots to achieve the aforementioned purpose. It is installed on the back of the display panel and is shielded, so there is no need to consider the state of the naked eye in the layout of the dots.

The light emission requirements of the front light panel are similar to those of the backlight panel, but because it is arranged on the front side of the display panel, it is a component that can be directly visually seen by the user. Therefore, the technical means of the backlight panel cannot be completely applied to the field of front light panels. Based on this, various methods have emerged to adjust the uniformity and brightness of the front light plate. For example, the Republic of China Patent Certificate No. I507747 discloses that the functional material layer on the light guide plate can make the light guide plate itself and the supply The adhesive layer and the functional material layer of the adhesive functional material layer have different refractive indexes to achieve the purpose of adjusting the light performance; or as the Republic of China Patent Certificate No. I514602 document, it is an additional installation through the light emitting surface of the front light plate Two transparent substrates are used to achieve the purpose of adjusting the light performance; or, as in the Republic of China Patent Certificate No. I518435, it is to increase the overall electrophoretic display by adding a plurality of light convergence films with different refractive indexes in the front light module Brightness; or as in the Republic of China Patent Certificate No. I518564, which is a method of adding a cladding layer on one side of the light guide plate and adding a plurality of columnar structures on the other side to improve the light guide rate of the downward light guide; or The Republic of China Patent Certificate No. I580942, which is the technical content proposed by the applicant in this case a few days ago, is a fixture and method for testing the naked-view board, that is, the front-view board, in order to facilitate the confirmation of the front-light board. Whether the design of the dots can achieve the required overall light uniformity and brightness and other light output performance; and the Republic of China Patent Certificate No. I588551 also proposed the technology of the front light plate recently by the applicant, which is disclosed in the front light plate Define a design area with a certain length, and through a single type of dot, in each design area with a different distance from the light incident side, adjust the layout density to make the front light board uniformly emit light.

The existing prior art in the field of various front light panels mentioned above mostly uses the addition of other structures, such as film materials, plates, columnar structures, etc., to adjust the light performance of the front light panels or modules. Or, as in the patent application filed by the applicant in this case, the light performance can be adjusted by designing the density of a single dot structure in different areas, or after the front light board is designed, the fixture can be used to test the light extraction ability design of the front light board. Whether it meets the requirements to produce and manufacture better front light board products, but these methods are not only inconvenient and difficult in development and production, but also have problems such as greatly increasing product cost and thickness.

In view of this, the inventor of the present invention, based on the rich experience in related industries, through continuous ideas and experiments, proposes a front light board with hybrid dots to solve the deficiencies of existing front light board related products.

One objective of the present invention is to provide a front light plate with mixed dots, which can shorten the reflection distance of light on the near-incident side by arranging dots with two different structures, and make the light emitted from the near-incident side more uniform. And it meets the needs, and at the same time, the overall light uniformity can be improved, and the poor visual changes caused by the two kinds of dots when the user is looking directly can be eliminated.

In order to achieve the above objective, the present invention discloses in one embodiment a front light plate with mixed dots for overlaying on an electrophoretic display panel, including: a light-incident surface for receiving light; a light-emitting surface, and the input The light surface is arranged vertically adjacent to each other for light emission; the lower surface is arranged opposite to the light-emitting surface and vertically adjacent to the light-incident surface, and the lower surface starts from the edge adjacent to the light-incident surface and faces opposite to the light-incident surface. The direction of the surface defines a first dotted area and a second dotted area. The first dotted area and the second dotted area are partially overlapped to form a dot junction area; a plurality of collimated dots are arranged on the first dotted area. In the area, the arrangement density of the collimated dots gradually increases in the direction relative to the light incident surface; and the plural light-taking dots are arranged in the second dotted area, and the layout density of the light-obtaining dots is opposite to the light-incident surface. The direction of the light incident surface gradually increases, and the angle between the line segment corresponding to the ring wall surface of the light-extracting dots and the central axis of the light-obtaining dots in the cross section is larger than that of the ring wall surface of the collimated dots. The angle between the line segment and the central axis of the collimated outlets; among them, the collimated outlets and the light extraction outlets are located in the junction area of the outlets at the same time, and the collimated outlets and the light extraction outlets are located at the same time The outlets are arranged in a state of interlacing and permeating each other. In this way, it can provide a uniform light output, and at the same time eliminate the adverse visual effects caused by different dots when the user looks directly, and provide more excellent optical products.

In another embodiment, the present invention also discloses a front light plate with mixed dots for overlaying on an electrophoretic display panel, comprising: a light incident surface for receiving light; and a light emitting surface perpendicular to the light incident surface Adjacently arranged for light to be emitted, and the light-emitting surface starts from the edge adjacent to the light-incident surface, and defines a first dotted area and a second dotted area in a direction opposite to the light-incident surface, the first dotted area And the second dotted area partially overlap each other to form a dot junction area; the lower surface is arranged opposite to the light-emitting surface and vertically adjacent to the light-incident surface; a plurality of collimated dots are arranged in the first dotted area, The arrangement density of the collimated dots is gradually increased in the direction relative to the light incident surface; and the plural light-taking dots are arranged in the second dotted area, and the layout density of the light-obtaining dots is opposite to the light incident surface The direction of the light extraction dots gradually increases, and the angle between the line segment corresponding to the ring wall surface of the light extraction dots and the central axis of the light extraction dots is larger than the line segment corresponding to the ring wall surface of the collimated dots. The angle between the central axis of the collimated outlets; among them, the collimated outlets and the light-extracting outlets are located in the junction area of the outlets at the same time, and the collimated outlets and the light-extracting outlets are present The layout state of interlaced penetration. In this embodiment, it is disclosed that the collimating dots and the light-trapping dots are arranged on the light-emitting surface, which can also have excellent light-emitting uniformity and eliminate the adverse visual effects when the user looks directly.

Based on the foregoing two embodiments, one embodiment reveals that the arrangement of the collimated outlets in the junction area of the outlets is in a zigzag pattern, and the arrangement of the light extraction outlets in the junction area of the outlets is in line with the The equal-collimated dots are distributed in a relatively zigzag pattern for better dot mixing performance.

In addition, in another embodiment, the angle between the line segment corresponding to the ring wall surface of the light-trapping dots in the cross section and the central axis of the light-trapping dots is between 70 and 80 degrees to allow light to pass through The adjustment of light extraction dots forms a more uniform light output state.

In order to improve the light adjustment efficiency of the adjacent light-incident side to shorten the reflection distance and reduce the dark area area, one embodiment discloses the line segment corresponding to the annular wall surface of the collimating dots and the central axis of the collimating dots The angle of the clamp is between 40 and 60 degrees.

Next, in the next embodiment, it is disclosed that the collimating dots are recessed structures formed by laser bombardment. In addition to making the collimating dots have a rough surface to facilitate adjustment of the light path, it can also improve the overall processing speed and dot shape. Processing accuracy.

In summary, the front light plate with mixed dots disclosed in the present invention can effectively improve the light output state and the overall light output uniformity on the near-incident side through the arrangement of two different dot structures, and at the same time, through a special layout method Eliminates the poor visual presentation caused by the two kinds of dot distribution boundaries when the front light board is directly viewed by the user. Furthermore, through the structural constraints of the collimation dots and light extraction dots, the light adjustment effect can be improved, and to facilitate the generation of collimated dots with rough surfaces and considering the process speed and accuracy, you can further choose The method of laser bombardment to form collimated dots. In addition, in order to reduce the obvious degree of the boundary line between the collimating network points and the light extraction network points, the collimation network points and the light extraction network points in the boundary area of the network points can be distributed in a relatively zigzag pattern.

The front light panel is different from the application of the backlight panel. For the user to directly view, the front light panel will not be provided with a diffuser or a squeeze sheet to cover the flaws. Therefore, the design must pay attention to the possibility of more users looking directly at it. The flaw details. For example, the backlight panel is at the low beam position on the side of the incoming light, especially in front of the LED. Unless a large structure visible to the naked eye is introduced for the purpose of destroying the light type and other considerations, in principle, the dots will not be designed to destroy Total reflection, resulting in light. What's more, it is suggested here as a smooth mirror-like surface in related US patents. However, in order to deal with the problem of collective light shift (shift) after the front light plate is laminated with light-transmitting layers with different refractive indexes such as touch panels, protective covers, etc., the inventor of this case in the Republic of China Patent Certificate No. I588551 document, That is, it is proposed that a certain density of dots must be designed at the low beam position on the side of the front light panel near the access light.

Therefore, in order to improve the uniformity of the light output of the front light plate and avoid uneven performance in some areas of excessive brightness or darkness, based on the experience of the front light plate design, the inventor understands that in the field of the front light plate, a single dot type is set on the front light plate. The state of the art is no longer adequate, especially in the area adjacent to the light incident side, which often produces dark bands. Through continuous experiments, the inventor conceived that two different dot structures can be arranged on the front light plate to adjust the light appearance of each area of the front light plate, so that the front light plate can have excellent light output uniformity as a whole. And because the front light board is set in front of the display panel, it can be directly viewed by the user. Therefore, in the design, if the dot layout is used as the main light adjustment technology, it must be considered whether the user will see the front light board under direct vision. The dot structure may affect the viewing and use due to the layout state of the dots. Therefore, in the case of using two types of dots, the present invention also uses a special layout method to eliminate the undesirable visual effects that the user may see under direct vision. The following is a detailed description of the technical features of the present invention.

Please refer to FIGS. 1 and 2, which are a schematic diagram of the structure of a light plate before an embodiment of the present invention and a schematic cross-sectional view of a front light plate equipped with an electrophoretic display panel. The present invention discloses a front light plate 1 with mixed dots for covering on an electrophoretic display panel 2, including a light incident surface 10, a light emitting surface 12, a lower surface 14, a plurality of collimating dots 16, and a plurality of light extraction dots 18. Among them, the front light plate 1 is used in practical applications to facilitate the assembly of the electrophoretic display panel 2. Generally, a frame structure is arranged on the side of the light incident surface 10, and a part of the light output surface 12 area shielded by the frame forms a transition zone, wherein the transition zone It refers to the area that is shielded by the frame and not for the user to view the screen. However, this is an existing technology in this field, so I will not repeat it here. The light incident surface 10 is for receiving light, such as light from an LED. The light-emitting surface 12 and the light-incident surface 10 are vertically adjacent to each other for light emission. The lower surface 14 is opposite to the light-emitting surface 12 and vertically adjacent to the light-incident surface 10. The lower surface 14 starts from the edge adjacent to the light incident surface 10, and defines a first dotted area 11 and a second dotted area 13, a first dotted area 11 and a second dotted area 13 in the direction opposite to the light incident surface 10. The part overlaps each other to form a junction area 15 of dots. The dotted line shown in the figure is used to indicate the starting point boundary of the second dotted area 13, and the center line is used to indicate the end boundary of the first dotted area 11.

The collimated dots 16 are arranged in the first dotted area 11, and the arrangement density of the collimated dots 16 is gradually increased toward the light incident surface 10, and in an implementation state, the collimated dots 16 may have a rough surface. The collimated dots 16 may be recessed structures. The light-trapping dots 18 are arranged in the second dot layout area 13. The light-trapping dots 18 can be recessed structures, and the cross-section of the light-trapping dots 18 is sandwiched between the line segment corresponding to the ring wall surface and the central axis of the light-trapping dots 18 The angle θ _{1 is greater than the angle θ 2} between the line segment corresponding to the annular wall surface of the collimating mesh point 16 and the central axis of the collimating mesh point 16 in the cross-section, so that the light extraction mesh point 18 appears smoother than the collimating mesh point 16 The structure status can be referred to as shown in Figure 2. Among them, the outlet junction area 15 is provided with collimating outlets 16 and light-trapping outlets 18 at the same time, and the collimating outlets 16 and the light-trapping outlets 18 are arranged in a mutually interlaced and penetrated state.

Accordingly, by arranging two different structural shapes of the dots on the front light plate 1, the light output effect at the light incident side of the front light plate 1 can be effectively improved and the overall uniformity can be improved. The light entering the front light plate 1 from the light incident surface 10 is guided by the collimating dots 16, which can effectively shorten the reflection distance of the light, that is, shorten the optical path, so that the light is formed in an area closer to the light incident surface 10 , In order to eliminate the dark band phenomenon that may occur near the light-incident side area, and after shortening the optical path, the frame length of the matching application can be reduced, so that the active area of the front light plate 10 for the user to view is increased. The rear light extraction dots 18 can allow light to be adjusted by the light extraction dots 18 to form a uniform light output on the light exit surface 12. At the same time, the distribution density of the light extraction dots 18 can increase toward the side of the light entrance surface 10 to facilitate The area far away from the light source also has the same brightness and uniformity. In view of the direct visual impact caused by the installation of two different dot structures, it can be solved by making the collimated dots 16 and the light-extracting dots 18 in the junction area 15 of the dots to be interlaced and penetrated. The here refers to Interlaced penetration layout means that the collimated dots 16 in the junction area 15 of the outlets will be set in the direction relative to the light incident surface 10 in a manner of slowly reducing the layout ratio. The light extraction dots 18 in the junction area 15 of the outlets will be set It is set in a way to slowly increase the layout ratio toward the direction relative to the light incident surface 10, so that the collimating dots 16 and the light extraction dots 18 will be interlaced with each other in the dot junction area 15, forming the collimation dots 16 to penetrate the light extraction dots 18, the light extraction dot 18 penetrates into the setting state of the collimating dot 16, so that when the front light board 1 is used, the user will not see the obvious dot layout boundary and the poor vision caused by the two types of dots when the front light board 1 is applied. Present. Wherein, although the collimated dots 16 in the border area 15 of the dots will be arranged in a way to slowly reduce the layout ratio in the direction relative to the light incident surface 10, the layout density of the collimated dots 16 will still be higher than that of the adjacent incident light. The area of the surface 10 and the overall layout density in the junction area 15 of the dots will also be greater than the area adjacent to the light-incident surface 10. In addition, if the collimating dots 16 have a rough surface, the characteristics of a wide variety of cross-sectional angles of the rough surface can be used to allow light to diverge and atomize the boundary between the collimating dots 16 and the light extraction dots 18 for viewing purposes. More consistent and even. Among them, the size of the aforementioned first dotted area 11, second dotted area 13 and dot junction area 15 can be adjusted according to the environmental conditions of the subsequent application of the front light board 1 and other factors such as the size of the matching components, so as to facilitate the provision of For the best light effect, the focus of the present invention is to use two different dots to adjust the poor light appearance on the near light side, and effectively solve the direct vision caused by the two types of dots on the front light plate 1. influences. It should be noted that the layout state of the collimated dots 16 and the light-extracting dots 18 in the dot junction area 15 shown in the figure, as well as the dot structure model are only for illustrative purposes, in order to facilitate the understanding of the technical features of the present invention. It represents the actual layout and structure of the dots, and the dot layout of the present invention is not limited to this.

For subsequent applications, the aforementioned front light plate 1 can be matched with the LED light bar 3 to form a front light module structure. The front light plate 1 is assembled in front of the electrophoretic display panel 2 as shown in FIG. 2. After the light of the LED light bar 3 enters the front light plate 1 from the light-incident surface 10, part of the light is formed by a shorter optical path on the near-light-incident side due to the collimated dots 16, and part of the light is produced by the action of the light-extracting dots 18. The light-emitting surface 12 as a whole forms a uniform light-emitting performance. The front light plate 1 and the electrophoretic display panel 2 can be combined and fixed with each other through optical glue. On the light-emitting surface 12 of the front light plate 1, it is also possible to superimpose optical elements or be provided with touch films or protective covers (not shown in the figure). Show), to improve the protective effect of the front light plate 1. However, the foregoing is only an application method of the front light plate 1 of the present invention, and is not intended to limit the use of the front light plate 1.

As shown in Figure 2, in order to facilitate the formation of uniform light rays in response to the structure of the light extraction dot 18, the cross section of the light extraction dot 18 is clamped by the line segment corresponding to the ring wall surface of the light extraction dot 18 and the central axis of the light extraction dot 18. Suppose the angle θ _{1 is} between 70 and 80 degrees as an example. The light extraction dots 18 structure within the aforementioned angle range can form a better light guiding effect with respect to light, and keep the front light plate 1 with better picture contrast during subsequent applications. On the other hand, in order to make the light from the near-incident side area guided by the collimating dots 16 to have a better appearance, the structure of the collimating dots 16 can also be designed, for example, the cross-section of the collimating dots 16 can be designed. _{The angle θ 2} between the line segment corresponding to the ring wall and the central axis of the collimating mesh point 16 is between 40 and 60 degrees. In the aforementioned angle range, the collimated dots 16 can shorten the reflection distance of the light, and can form the light in the area of the light-emitting surface 12 that is closer to the light-incident surface 10, eliminating the dark band area of the front light plate 1 on the light-incident side, so that The overall light output of the front light plate 1 is more uniform and smooth.

In addition, the collimating dots 16 can be a concave structure formed by laser bombardment, so as to have a rough surface that meets the requirements of light guide, and accordingly, it can have better process efficiency and structural accuracy, avoiding the collimation of the dots 16 The structural difference causes poor light guiding effect, or even a completely different light emitting state. The collimation dots 16 formed by laser bombardment has the advantage that the cross-section of the collimating dots 16 can cover a wide variety of angles, thus improving the light divergence performance, allowing the collimating dots 16 to shorten the light reflection distance while also reducing the light reflection distance. Effectively atomize the boundary between the two kinds of dots on the front light board 1. On the other hand, if the front light plate is injected into the molding front light plate with a point impact machine or a tool, the surface of the collimating dots 16 will be smoother and the directivity of the light reflected will be stronger.

Furthermore, please refer to FIG. 3 together, which is a schematic diagram of the optical plate structure before another implementation state of an embodiment of the present invention. In order to make the dot distribution in the dot junction area 15 more uniform, and at the same time prevent the light from forming a local over-bright or too dark light emission state there, the collimated dots 16 can be arranged in the dot junction area 15 It is distributed in a zigzag pattern, and the arrangement of the light-taking mesh points 18 in the junction area 15 of the mesh points is in a zigzag pattern opposite to the collimating mesh points 16. Accordingly, when the light enters the interior of the front light plate 1, the light emission system in the dot junction area 15 can be more smooth and uniform, and the user will not be able to see the obvious dot setting boundary.

Please refer to FIGS. 4 and 5 for the combination, which are a schematic diagram of the structure of the light plate and the cross-sectional diagram of the front light plate equipped with an electrophoretic display panel before another implementation state of an embodiment of the present invention. Please refer to FIGS. 1 and 3 for the combination. Except as described in the previous paragraphs, the lower surface 14 of the front light plate 1 defines a first dotted area 11, a second dotted area 13 and a dot junction area 15, and collimated dots 16 and light-extracting dots are arranged on the lower surface 11 In addition, in the light plate 1 before the present invention, the first dotted area 11, the second dotted area 13 and the dot junction area 15 can also be defined on the light emitting surface 12, so that the collimating dots 16 and the light extracting dots 18 are formed on the light emitting surface 12. Above, the following will continue to illustrate the structural features of another implementation state of the present invention. In this implementation state, the front light plate 1 also has a light-incident surface 10, a light-emitting surface 12, a lower surface 14, a collimating mesh point 16, and a light-extracting mesh point 18. The light incident surface 10 is also vertically adjacent to the light output surface 12 and the lower surface 14, and the light output surface 12 and the lower surface 14 are disposed oppositely. The light-emitting surface 12 starts from the edge adjacent to the light-incident surface 10, and defines a first dotted area 11 and a second dotted area 13, a first dotted area 11 and a second dotted area 13 in the direction opposite to the light incident surface 10. The part overlaps each other to form the junction area 15 of the network points. The collimated dots 16 are arranged in the first dotted area 11, that is, on the light-emitting surface 12, and the placement density thereof gradually increases toward the light-incident surface 10, and the collimated dots 16 may have a rough surface. _{The light-taken dots 18 are arranged in the second dotted area 13 and formed on the light-emitting surface 12. The angle θ 1} between the line segment corresponding to the ring wall surface of the light-taken dot 18 and the central axis of the light-taken dot 18 in the cross-section of the light dot 18 is greater than _{The angle θ 2} between the line segment corresponding to the ring wall surface of the collimating mesh point 16 and the central axis of the collimating mesh point 16 in the cross-section is shown in Fig. 5. In the junction area 15 of the outlets, there are collimating outlets 16 and light-extracting outlets 18 at the same time, and the collimating outlets 16 and the light-obtaining outlets 18 are arranged in a state of interleaving and permeating each other, as shown in Figure 4. And to repeat here, the layout of the collimated dots 16 and the light-extracting dots 18 in the dot junction area 15 shown in the figure are for illustrative purposes only, in order to facilitate the understanding of the technical features of the present invention, and does not represent the actual layout of the dots. The situation, the dot arrangement state of the present invention is not limited to this. The dotted line shown in the figure is used to indicate the starting point boundary of the second dotted area 13, and the center line is used to indicate the end boundary of the first dotted area 11.

Same as the foregoing, the present invention achieves the improvement of the overall light uniformity and the elimination of poor visual presentation caused by the two types of dots under the direct view of the user through the mixed use of two different dots on the front light plate 1. The light entering the front light plate 1 from the light incident surface 10 is guided by the collimating dots 16, which can effectively shorten the reflection distance of the light, so that the light is formed in an area closer to the light incident surface 10, thereby eliminating dark bands. When the light continues to contact the light extraction dots 18 before proceeding, the light can be adjusted by the light extraction dots 18 to form a uniform light emission on the light exit surface 12. The direct visual impact caused by the installation of two different dot structures can be solved by making the collimating dots 16 and the light extraction dots 18 interlaced and penetrated. In addition, if the collimating dots 16 have a rough surface, the characteristics of a wide variety of cross-sectional angles of the rough surface can be used to allow light to diverge and atomize the boundary between the collimating dots 16 and the light extraction dots 18 for viewing purposes. More consistent and even. For the rest of the detailed technical features, please refer to the foregoing paragraphs, and will not repeat them here.

_{As shown in Fig. 5, in the present embodiment, the angle θ 1} between the line segment corresponding to the ring wall surface of the light-trapping dot 18 and the central axis of the light-trapping dot 18 in the cross section of the light-trapping dot 18 can also be set to be between 70 and 80 _{The angle θ 2} between the line segment corresponding to the ring wall surface and the central axis of the collimating mesh point 16 in the cross section of the collimating mesh point 16 is between 40 and 60 degrees, in order to improve the The light adjustment efficiency on the light entrance side improves the overall light output uniformity. In application, the front light plate 1 is overlaid on the electrophoretic display panel 2, and the two can be bonded to each other through optical glue, and the LED light bar 3 can be provided corresponding to the light incident surface 10 of the front light plate 1. For the rest of the detailed technical features, please refer to the foregoing paragraphs, and will not repeat them here.

In addition, in order to facilitate the collimating dots 16 to have a rough surface, the collimating dots 16 can be made into a concave structure formed by laser bombardment, and the overall process speed and structural accuracy can be improved by the laser bombardment method. For the rest of the detailed technical features, please refer to the foregoing paragraphs, and will not repeat them here.

Refer to Figure 2 again. When the collimating dots 16 and the light-extracting dots 18 are formed on the light-emitting surface 12, the arrangement of the collimating dots 16 in the dot junction area 15 can also be arranged in a zigzag pattern, and the light-obtaining dots can be arranged in a zigzag pattern. 18 The layout in the junction area 15 of the outlets is arranged in a zigzag pattern opposite to the collimating outlets 16, so as to eliminate the influence of the interlaced layout of the collimating outlets 16 and the light extraction outlets 18 on the user’s viewing, allowing two kinds of The dividing line of the outlets tends to become more foggy. Refer to Figure 2 for the aforementioned layout state. Although the collimation dots 16 and the light extraction dots 18 shown in Figure 2 are formed on the lower surface 14, when the collimation dots 16 and the light extraction dots 18 are in a zigzag shape The distribution status can still refer to the content shown in Figure 2. And to repeat here, the layout of the collimated dots 16 and the light-extracting dots 18 in the dot junction area 15 shown in the figure are for illustrative purposes only to facilitate the understanding of the technical features of the present invention, and does not represent the actual layout of the dots. The situation, the dot arrangement state of the present invention is not limited to this.

In summary, the front light plate with mixed dots disclosed in the present invention can effectively improve the light output state and the overall light output uniformity on the near-incident side through the arrangement of two different dot structures, and at the same time, through a special layout method Eliminates the poor visual presentation caused by the two kinds of dot distribution boundaries when the front light board is directly viewed by the user. It is particularly reiterated that the present invention belongs to the field of front light panels, which are very different from the design motives and considerations of the backlight panel. Although the backlight panel also has the requirements for uniform light emission and brightness, it is because the backlight panel is installed on the panel. The back side, therefore, part of the viewing defects can be concealed by the panel and other components. The front light plate is set on the front side of the panel, and is the first line element for the user to operate and view. Therefore, only slight structural defects may cause The user sees extremely obvious bright spots or bright lines. The dimming technology used in the backlight panel cannot be applied to the front light panel. Therefore, the two optical element technologies in different fields should not be confused. Based on this, it can be known that the design of the front light board faces various difficulties. Therefore, it is possible to design a light board that meets the requirements of light emission without causing obvious visual defects to the user under such severe restrictions, and it is necessary to obtain due protection and encouragement to facilitate the provision of more excellent optical products.

1: Front light board 10: Light entrance surface 11: First dot area 12: Light emitting surface 13: Second dot area 14: Lower surface 15: Intersection area 16: Collimation dot 18: Light-taking dot 2: Electrophoresis display panel 3 : LED light bar θ ₁ : The angle between the line segment corresponding to the ring wall surface of the light extraction dot and the central axis of the light extraction dot θ ₂ : The line segment corresponding to the ring wall surface of the collimating dot section and the collimation dot The angle between the axis

FIG. 1 is a schematic diagram of the structure of the optical panel before an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of an electrophoretic display panel equipped with a front light plate according to an embodiment of the present invention. FIG. 3 is a schematic diagram of the structure of an optical panel before another implementation state of an embodiment of the present invention. FIG. 4 is a schematic diagram of the structure of the light plate before another implementation state of an embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of a light plate before the front light plate is equipped with an electrophoretic display panel in another implementation state of one embodiment of the present invention.

1: Front light board

10: Glossy surface

11: The first distribution area

13: The second distribution area

14: lower surface

15: Junction area of outlets

16: Collimated outlets

18: Take light outlets

Claims (6)

A front light plate with mixed dots for covering on an electrophoretic display panel, comprising: A light-incident surface for receiving light; A light-emitting surface, which is vertically adjacent to the light-incident surface, for light emission; The lower surface is arranged opposite to the light-emitting surface and vertically adjacent to the light-incident surface, and the lower surface uses the edge adjacent to the light-incident surface as a starting point, and defines a first dotted area and a first dotted area in the direction opposite to the light-incident surface. A second dot layout area, where the first dot layout area and the second dot layout area partially overlap each other to form a dot junction area; A plurality of collimated dots are arranged in the first dotted area, and the layout density of the collimated dots gradually increases in the direction relative to the light incident surface; and The plurality of light extraction dots are arranged in the second distribution area, and the angle between the line segment corresponding to the ring wall surface of the light extraction dots and the central axis of the light extraction dots in the cross section of the light extraction dots is greater than the collimated dots The angle between the line segment corresponding to the ring wall in the cross-section and the central axis of the collimating mesh points; among them, the collimating mesh points and the light extraction mesh points are simultaneously arranged in the junction area of the mesh point, and the collimating mesh points are located at the same time. The outlets and the light-extracting outlets are arranged in a state of interlacing and permeating each other. A front light plate with mixed dots for covering on an electrophoretic display panel, comprising: A light-incident surface for receiving light; A light-emitting surface is arranged perpendicularly adjacent to the light-incident surface for light to exit, and the light-emitting surface starts from the edge adjacent to the light-incident surface, and defines a first dotted area and a dotted area in the direction opposite to the light-incident surface A second dot layout area, where the first dot layout area and the second dot layout area partially overlap each other to form a dot junction area; The lower surface is arranged opposite to the light-emitting surface and vertically adjacent to the light-incident surface; A plurality of collimated dots are arranged in the first dotted area, and the layout density of the collimated dots gradually increases in the direction relative to the light incident surface; and The plurality of light extraction dots are arranged in the second distribution area, and the angle between the line segment corresponding to the ring wall surface of the light extraction dots and the central axis of the light extraction dots in the cross section of the light extraction dots is greater than the collimated dots The angle between the line segment corresponding to the ring wall in the cross-section and the central axis of the collimating mesh points; among them, the collimating mesh points and the light extraction mesh points are simultaneously arranged in the junction area of the mesh point, and the collimating mesh points are located at the same time. The outlets and the light-extracting outlets are arranged in a state of interlacing and permeating each other. For example, the front light board with mixed dots described in item 1 or item 2 of the scope of patent application, wherein the arrangement of the collimated dots in the junction area of the dots is in a zigzag pattern, and the light extraction dots are at the junction of the dots The layout in the area is in a zigzag pattern opposite to the collimated dots. For example, the front light plate with mixed dots described in item 1 or item 2 of the scope of patent application, wherein the angle between the line segment corresponding to the ring wall surface of the light-taking dots in the cross section and the central axis of the light-obtaining dots, It is between 70 and 80 degrees. For example, the front light plate with mixed dots described in item 1 or item 2 of the scope of patent application, wherein the cross section of the collimated dots corresponds to the angle between the line segment of the ring wall surface and the central axis of the collimated dots, It is between 40 and 60 degrees. For example, the front light plate with mixed dots described in item 1 or item 2 of the scope of patent application, wherein the collimated dots are recessed structures formed by laser bombardment.

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