Lens and liquid crystal panel

Abstract

The embodiment of the utility model relates to the technical field of optical lenses, and discloses a lens and a liquid crystal panel. The lens includes a vertical portion and a curved portion, the edge of the curved portion is connected to the vertical portion, the vertical portion and the curved portion jointly form a light entrance groove, the curved portion has a light exit curved surface, the light exit curved surface is away from the light entrance groove, the light exit curved surface is provided with an inner concave portion, the inner concave portion surrounds the light entrance groove, and the inner concave portion is used to refract part of the light toward the edge area of ​​the light spot. In the above manner, the embodiment of the utility model can adjust the light in the edge area of ​​the light spot, which is conducive to improving the uniformity of the light intensity of the entire light spot.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of optical lenses, and in particular to a lens and a liquid crystal panel. Background Art

[0002] In the LCD panel, the lens is one of the indispensable parts. The light emitted by the lamp beads in the LCD panel passes through the lens 1' and is displayed on the screen. Figure 1 , Figure 1 The cross-sectional structure of the existing lens 1' is shown. The structure of the light-emitting curved surface 111' of the lens 1' affects the distribution of light. The existing lens 1' includes a vertical portion 12' and a curved portion 11'. The vertical portion 12' is connected to an edge 112' of the curved portion 11'. The light-emitting curved surface 111' is Figure 1 The cross section shown is a curve, and the curve is convex outward relative to the center line H'. The lamp bead 2' is located on the side of the vertical portion 12' away from the curved portion 11'. The light emitted by the lamp bead 2' is refracted by the curved portion 11' and then emitted from the light emitting curved surface 111', forming a light spot 3' on the side of the light emitting curved surface 111' away from the vertical portion 12'.

[0003] During the implementation of the embodiment of the utility model, the inventors found that: using the above-mentioned method, most of the light emitted by the lamp bead 2' is concentrated and emitted toward the middle position of the curved surface, while there is less light at the edge of the curved surface, resulting in the light spot 3' being darker in the edge area 31'. When the lens 1' is applied to a liquid crystal panel, stripes are likely to appear on the liquid crystal panel. Utility Model Content

[0004] The main technical problem solved by the embodiments of the utility model is to provide a lens and a liquid crystal panel, which can increase the light intensity at the edge position of the curved surface of the lens, thereby enhancing the brightness of the light spot in the edge area, which is beneficial to improving the uniformity of the brightness of the light spot, thereby reducing the stripes on the liquid crystal panel.

[0005] In order to solve the above technical problems, a technical solution adopted in an embodiment of the utility model is: to provide a lens, including a vertical portion and a curved portion, the edge of the curved portion is connected to the vertical portion, the vertical portion and the curved portion jointly form a light entrance groove, the curved portion has a light exit curved surface, the light exit curved surface is away from the light entrance groove, the light exit curved surface is provided with a concave portion, the concave portion surrounds the light entrance groove, and the concave portion is used to refract part of the light toward the edge area of ​​the light spot.

[0006] Optionally, the light emitting curved surface is further provided with an outer convex portion, which surrounds the light incident groove and is located between the inner concave portion and the vertical portion.

[0007] Optionally, the light emitting curved surface is further provided with a top groove, and along a first direction, the top groove is opposite to the light incident groove, and the first direction is parallel to the center line of the lens.

[0008] Optionally, the lens further comprises a support platform, and the support platform is mounted on a surface of the vertical portion which is away from the curved portion.

[0009] Optionally, there are multiple support platforms, and the multiple support platforms are all installed on the surface of the vertical portion away from the curved surface portion.

[0010] Optionally, on the first section, along the first direction, the concave portion extends in an arc shape, wherein the center line of the lens is located in the first section, and the first direction is parallel to the center line of the lens; on the first section, the arc formed by the outer surface of the concave portion is the first arc, and along the second direction, the distance between the starting point of the first arc and the center line of the lens is D1, and D1 satisfies: 7.5mm≤D1≤7.55mm, and the second direction is perpendicular to the first direction.

[0011] Optionally, on the first cross section, along the first direction, the convex portion extends in an arc shape, the arc formed by the surface of the convex portion is a second arc, the starting point of the second arc is connected to the end point of the first arc, and along the second direction, the distance between the starting point of the second arc and the center line of the lens is D2, and D2 satisfies: 7.75mm≤D2≤7.79mm.

[0012] Optionally, along the second direction, a distance D3 between a starting point of the first arc and an end point F of the second arc satisfies: 0.22 mm≤D3≤0.26 mm.

[0013] Optionally, along the first direction, a distance D4 between a starting point of the first arc and an end point F of the second arc satisfies: 0.3 mm≤D4≤0.36 mm.

[0014] To solve the above technical problems, another technical solution adopted by the embodiment of the utility model is: to provide a liquid crystal panel, including multiple lamp beads and multiple lenses mentioned above, the multiple lamp beads correspond one by one to the multiple lenses, and the light emitted by the lamp beads can pass through at least part of the lens.

[0015] The beneficial effect of the embodiment of the utility model is: different from the prior art, the embodiment of the utility model arranges a light emitting curved surface on the curved surface portion, and arranges an inner concave portion on the light emitting curved surface, the inner concave portion surrounds the light incident groove, and refracts part of the light toward the edge area of ​​the light spot through the inner concave portion, thereby adjusting the brightness of the edge area of ​​the light spot, which is beneficial to improving the uniformity of the brightness of the entire light spot, thereby reducing the stripes on the liquid crystal panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of a lens and a lamp bead in the prior art;

[0018] Figure 2 is a schematic structural diagram of a lens provided in an embodiment of the utility model at a first viewing angle;

[0019] Figure 3 is a schematic structural diagram of a lens provided in an embodiment of the utility model at a second viewing angle;

[0020] Figure 4 is a schematic structural diagram of a lens provided in an embodiment of the utility model at a third viewing angle;

[0021] Figure 5 When there is a lamp bead, Figure 4 Schematic diagram of the cross-sectional structure of the middle section AA;

[0022] Figure 6 yes Figure 5 Enlarged view of the area shown in middle E;

[0023] Figure 7 It is a schematic diagram of the refraction direction of light at the inner concave part and the outer convex part;

[0024] Figure 8 It is a schematic diagram of the motion trajectory of part of the light rays of the lens provided in the embodiment of the utility model;

[0025] Fig. 9 Is adopted Figure 1 The light curve changes of the experiment with the lens shown in ;

[0026] Fig.10 It is a light curve variation diagram of an experiment conducted using the lens in the embodiment of the utility model.

[0027] Figure Number:

[0028] 1. Lens; 11. Curved portion; 111. Light emitting curved surface; 1111. Inner concave portion; 1112. Outer convex portion; 1113. Top groove; 12. Vertical portion; 13. Support platform; 131. First support platform; 132. Second support platform; 133. Third support platform; 134. Fourth support platform; 14. Light entrance groove. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] The LCD panel (not shown) generally includes multiple lamp beads and multiple lenses. One lens corresponds to one lamp bead. The light emitted by the lamp bead needs to pass through the lens before being displayed on the screen. Figure 1 The current lens 1' generally includes a vertical portion 12' and a curved portion 11', the vertical portion 12' is connected to an edge 112' of the curved portion 11', and the curved portion 11' is provided with a light emitting curved surface 111'. Figure 1 The cross section shown is a curve, and the curve is convex outward relative to the center line H'. The lamp bead 2' is located on the side of the vertical portion 12' away from the curved portion 11'. The light emitted by the lamp bead 2' is refracted by the curved portion 11' and then emitted from the light emitting curved surface 111', and forms a light spot 3' on the side of the light emitting curved surface 111' away from the vertical portion 12'. However, with this arrangement, most of the light emitted by the lamp bead 2' is concentrated toward the middle position of the curved portion 11', while there is less light at the edge position of the curved portion 11', so that the brightness of the light spot 3' in the edge area 31' is darker. When the lens 1' is applied to a liquid crystal panel, it is easy to cause uneven brightness of the liquid crystal panel, resulting in a large number of stripes on the screen of the liquid crystal panel, affecting the user's visual experience.

[0033] In order to solve or partially solve at least one of the above problems, the present application provides a lens 1, and the specific structure of the lens 1 is described in detail below.

[0034] See also Figure 2 , Figure 3 and Figure 4 The lens 1 includes: a curved portion 11, a vertical portion 12 and a support platform 13. The edge of the curved portion 11 is connected to the vertical portion 12, and the support platform 13 is installed on the surface of the vertical portion 12 away from the curved portion 11. The support platform 13 can provide support for the lens 1. The vertical portion 12 and the curved portion 11 jointly form a light entrance groove 14, and the light entrance groove 14 is connected to the surface of the vertical portion 12 away from the curved portion 11. The light entrance groove 14 is used to receive the light emitted by the lamp bead 2, so that the light emitted by the lamp bead 2 can enter the curved portion 11 from the light entrance groove 14, and the light entering the curved portion 11 is refracted and then emitted, so that a light spot 3 can be formed on the side of the curved portion 11 away from the vertical portion 12.

[0035] For the curved surface 11 mentioned above, see Figures 5 to 8 ,in, Figure 7 and Figure 8 The straight line with an arrow in the middle represents the movement trajectory of part of the light. The curved portion 11 has a light emitting curved surface 111, and the light emitting curved surface 111 is arranged away from the light entrance groove 14. The light emitted by the lamp bead 2 enters the curved portion 11 from the light entrance groove 14, and then is refracted by the curved portion 11 and then emitted from the light emitting curved surface 111. The light emitting curved surface 111 is provided with an inner concave portion 1111, and the inner concave portion 1111 is arranged around the light entrance groove 14. When part of the light in the curved portion 11 passes through the inner concave portion 1111, the inner concave portion 1111 can refract part of the light in the direction of the vertical portion 12, so that the brightness of the edge area 31 of the light spot 3 is enhanced, which can improve the uniformity of the brightness of the entire light spot 3. Therefore, when the lens 1 is applied to a liquid crystal panel (not shown), the stripes appearing on the screen of the liquid crystal panel can be reduced, which is beneficial to improving the visual effect.

[0036] In some embodiments, see Figures 5 to 8, the light-emitting curved surface 111 is also provided with an outer convex portion 1112, the outer convex portion 1112 surrounds the light-entering groove 14, and the outer convex portion 1112 is located between the inner concave portion 1111 and the vertical portion 12. Specifically, one end of the outer convex portion 1112 is connected to the inner concave portion 1111, and one end of the outer convex portion 1112 away from the inner concave portion 1111 is connected to the vertical portion 12, that is, the edge 112 of the curved portion 11 is formed on the outer convex portion 1112, and the outer convex portion 1112 bulges outward relative to the center line H of the lens 1. The outer convex portion 1112 can also refract part of the light in the curved portion 11 toward the edge area 31' of the first light spot 3, so that the light output intensity at the edge 112 of the curved portion 11 can be further enhanced, and the uniformity of the entire light spot 3 can be further improved, and the stripes appearing on the screen of the liquid crystal panel can be reduced, which is conducive to improving the visual effect.

[0037] It is worth noting that the outer surface of the vertical portion 12 is roughly cylindrical, the outer surface of the curved portion 11 is roughly dome-shaped, and the center line of the vertical portion 12 coincides with the center line of the curved portion 11 to form the center line H of the entire lens 1 .

[0038] In some embodiments, see Figure 5 and Figure 8 , the light-emitting curved surface 111 is further provided with a top groove 1113, and along the first direction X, the top groove 1113 is opposite to the light-entering groove 14, and the top groove 1113 extends inwardly along the first direction X, wherein the first direction X is parallel to the center line H of the lens 1. In this embodiment, by providing the top groove 1113, when the light emitted by the lamp bead 2 irradiates the part of the light-emitting curved surface 111 constituting the top groove 1113, the part of the light-emitting curved surface 111 constituting the top groove 1113 can refract part of the light in a direction gradually away from the center line H, so that the light intensity of the light spot 3 near the middle area can be weakened, and the light intensity of the light spot 3 in other areas can be enhanced, which is conducive to improving the uniformity of the brightness of the entire light spot 3.

[0039] In some embodiments, see Figure 3 and Figure 4 There are multiple support platforms 13, and the multiple support platforms 13 are all installed on the surface of the vertical portion 12 away from the curved surface portion 11. The multiple support platforms 13 can provide support for the lens 1. In addition, the support platforms 13 also have a positioning function. By providing grooves corresponding to the multiple support platforms 13 on the component on which the lens 1 is installed, the support platforms 13 are inserted into the grooves, so that the lens 1 and the component on which the lens 1 is installed can be positioned.

[0040] Furthermore, there are four support platforms 13, which are distributed in a rectangular shape, namely a first support platform 131, a second support platform 132, a third support platform 133 and a fourth support platform 134. The first support platform 131 is opposite to the third support platform 133, and the second support platform 132 is opposite to the fourth support platform 134. The distance D5 between the center of the first support platform 131 and the center of the second support platform 132 is approximately 6 mm, and the distance D6 between the center of the second support platform 132 and the center of the third support platform 133 is approximately 11 mm.

[0041] It is understandable that, in some embodiments, the support platform 13 may not be provided, and the lens 1 may be supported directly by the vertical portion 12 .

[0042] In some embodiments, see Figure 6 On the first section AA, along the first direction X, the inner concave portion 1111 extends in an arc shape, and the inner concave portion 1111 is recessed toward the center line H of the lens 1, wherein the center line of the lens 1 is located in the first section AA.

[0043] In some embodiments, see Figure 6 On the first section AA, the arc formed by the outer surface of the inner concave portion 1111 is the first arc. Along the second direction Y, the distance between the starting point B of the first arc and the center line H of the lens 1 is D1, and D1 satisfies: 7.5mm≤D1≤7.55mm, wherein the second direction Y is perpendicular to the first direction X.

[0044] Further, along the second direction, a distance D1 between a starting point B of the first arc and a center line H of the lens 1 satisfies: 7.51 mm≤D1≤7.53 mm.

[0045] Further, along the second direction, a distance D1 between a starting point B of the first arc and a center line H of the lens 1 satisfies: D1 = 7.52 mm.

[0046] In some embodiments, see Figure 6 On the first cross section AA, along the first direction X, the convex portion 1112 extends in an arc shape, and the convex portion 1112 bulges away from the center line H of the lens 1 .

[0047] In some embodiments, see Figure 6 , the arc formed by the outer surface of the outer convex portion 1112 is a second arc, the starting point of the second arc coincides with the end point C of the first arc, and the end point F of the second arc is connected to the vertical portion 12. Along the second direction Y, the distance between the starting point of the second arc and the center line H of the lens 1 is D2, and D2 satisfies: 7.75mm≤D2≤7.79mm.

[0048] Further, along the second direction Y, the distance between the starting point of the second arc and the center line H of the lens 1 is D2, and D2 satisfies: 7.76 mm≤D2≤7.78 mm.

[0049] Further, along the second direction Y, the distance between the starting point of the second arc and the center line H of the lens 1 is D2, and D2 satisfies: D2 = 7.77 mm.

[0050] In some embodiments, referring to the figure, along the second direction Y, a distance D3 between a starting point of the first arc and an end point F of the second arc satisfies: 0.22 mm≤D3≤0.26 mm.

[0051] Further, along the second direction Y, a distance D3 between a starting point B of the first arc and an end point F of the second arc satisfies: D3 = 0.24 mm.

[0052] In some embodiments, see Figure 6 , along the first direction X, a distance D4 between a starting point B of the first arc and an end point F of the second arc satisfies: 0.3 mm ≤ D4 ≤ 0.36 mm.

[0053] Further, along the first direction X, a distance D4 between a starting point B of the first arc and an end point F of the second arc satisfies: D4≤0.33 mm.

[0054] In some embodiments, the diameter D5 of the vertical portion 12 satisfies: 17.25 mm ≤ D5 ≤ 17.35 mm.

[0055] In some embodiments, see Figure 6 , along the first direction X, the total length D6 of the lens 1 satisfies: 5.52 mm≤D6≤5.62 mm.

[0056] In an embodiment of the utility model, a light emitting curved surface 111 is arranged on the curved portion 11, and an inner recess 1111 is arranged on the light emitting curved surface 111, the inner recess 1111 surrounds the light incident groove 14, and part of the light is refracted toward the edge area 3 of the light spot 3 through the inner recess 1111, thereby increasing the brightness of the edge area 3 of the light spot 3, which is beneficial to improving the uniformity of the brightness of the entire light spot 3. Therefore, when the lens 1 is applied to a liquid crystal panel, the stripes appearing on the screen of the liquid crystal panel can be reduced.

[0057] In order to help readers better understand the concept of this application, the lens 1 provided in this application is described below. Figure 1 A comparative experiment was conducted with the lens 1' provided in the prior art shown in:

[0058] The test conditions are: Figure 8As shown, in dark conditions, a light receiving plate 4 is placed at a distance of D7=35mm from the lamp bead along the direction of the center line H. After the light emitted by the lamp bead 2 is refracted by the curved surface 11, a circular light spot 3 is formed at the light receiving plate 4. By measuring the amount of light at each part of the light spot 3, Fig. 9 and Fig.10 The curve diagram shown in Fig. 9 The curve in the figure is Figure 1 The lens 1' shown in FIG. Fig.10 The curve in the figure is Figures 2 to 5 The lens 1 shown in FIG. Fig. 9 and Fig.10 The horizontal axis in represents the distance from the center of the light spot 3, and its unit is millimeter. For example, the horizontal axis 0 represents the number of rays at the center of the light spot 3. Fig. 9 and Fig.10 The vertical axis in represents the number of rays. Fig. 9 and Fig.10 It can be seen that the light spot at a distance of 140 mm to 150 mm from the center of the light spot 3, Fig.10 The number of rays in Fig. 9 The large number of rays in Fig.10 The light intensity in the edge area 31 of the light spot is enhanced.

[0059] The utility model also provides a liquid crystal panel embodiment, which includes a plurality of lamp beads 2 and a plurality of the above-mentioned lenses 1, wherein the plurality of lamp beads 2 correspond one-to-one to the plurality of lenses 1, and the plurality of lamp beads 2 are distributed in a rectangular array, and the light emitted by the lamp beads 2 can pass through at least a portion of the lens 1 and then be presented on the screen of the liquid crystal panel. For the specific structure and function of the lens 1, refer to the above-mentioned embodiment, which will not be described one by one here.

[0060] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lens, comprising a vertical portion and a curved portion, wherein an edge of the curved portion is connected to the vertical portion, and the vertical portion and the curved portion together form a light entrance groove, characterized in that: The curved portion has a light emitting curved surface, the light emitting curved surface is away from the light incident groove, the light emitting curved surface is provided with an inner concave portion, the inner concave portion surrounds the light incident groove, and the inner concave portion is used to refract part of the light toward the edge area of ​​the light spot.

2. The lens according to claim 1, characterized in that The light-emitting curved surface is further provided with an outer convex portion, the outer convex portion surrounds the light-entering groove, and the outer convex portion is located between the inner concave portion and the vertical portion.

3. The lens according to claim 1, characterized in that The light-emitting curved surface is further provided with a top groove, and along a first direction, the top groove is opposite to the light-entering groove, and the first direction is parallel to the center line of the lens.

4. The lens according to claim 1, characterized in that The lens further includes a support platform mounted on a surface of the vertical portion that is away from the curved portion.

5. The lens according to claim 4, characterized in that: There are multiple support platforms, and all of the multiple support platforms are installed on the surface of the vertical portion away from the curved surface portion.

6. The lens according to claim 2, characterized in that: On a first cross section, along a first direction, the inner concave portion extends in an arc shape, wherein a center line of the lens is located in the first cross section, and the first direction is parallel to the center line of the lens; On the first section, the arc formed by the outer surface of the inner recess is a first arc. Along the second direction, the distance between the starting point of the first arc and the center line of the lens is D1, and D1 satisfies: 7.5mm≤D1≤7.55mm. The second direction is perpendicular to the first direction.

7. The lens according to claim 6, characterized in that On the first cross section, along the first direction, the convex portion extends in an arc shape, the arc formed by the surface of the convex portion is a second arc, the starting point of the second arc is connected to the end point of the first arc, and along the second direction, the distance between the starting point of the second arc and the center line of the lens is D2, and D2 satisfies: 7.75mm≤D2≤7.79mm.

8. The lens according to claim 7, characterized in that Along the second direction, a distance D3 between a starting point of the first arc and an end point F of the second arc satisfies: 0.22 mm≤D3≤0.26 mm.

9. The lens according to claim 7, characterized in that: Along the first direction, a distance D4 between a starting point of the first arc and an end point F of the second arc satisfies: 0.3 mm≤D4≤0.36 mm.

10. A liquid crystal panel, characterized in that: It comprises a plurality of lamp beads and a plurality of lenses as described in any one of claims 1 to 9, wherein the plurality of lamp beads correspond to the plurality of lenses one by one, and the light emitted by the lamp beads can pass through at least a portion of the lenses.

Images