TWI422871B - Optical elememt and display module - Google Patents

Description

Optical components and display modules

The present invention relates to an element and a module, and more particularly to an optical element and a display module using the same.

A general display device, such as a display panel on a liquid crystal display or a mobile phone, is usually provided with a driving circuit or other production industry in the periphery, so that a certain width is usually reserved as a frame of the display device at the periphery of the display area. The border will not provide an image, and the image provided in the display area will not be displayed above the border. Therefore, how to make the image screen provided by the display device can present a frameless visual effect is one of the topics that various manufacturers want to study.

In Chinese Patent Publication No. 101593473, FIGS. 1 and 3 disclose a frameless display device. An image transmission device is attached to the frame outside the display area of the display device, wherein the image transmission device has two slopes. The inclined surface has a reflecting portion and a penetrating portion, and the image of the display area can be divided into an image to be displayed in the display area and an image to be displayed on the frame, and the image to be displayed on the frame covers the frame, and a display device without a frame can be formed. In addition, in US Pat. No. 7,554,628, FIG. 9 and FIG. 10 disclose a light path changing lens in which the optical path changing lens has a sloped surface with a gamma angle, the light path changing lens height is t, and the width of the frame is LB, where tan γ=t/LB, the optical path changing lens is disposed above the display panel, and can change the optical path and cover the frame to expand the viewing angle.

Figures 6 and 8 of U.S. Patent No. 6,481,482 disclose a light compensating element above the panel, wherein the optical compensating element has an optically compensating lens and a light transmissive layer, and the optical compensating lens allows the light to expand outward. In addition, FIG. 2, FIG. 3 and FIG. 10a of US Pat. No. 6,927,908 discloses that an optical element is disposed above a display area (LCD), wherein the optical element has a generally planar area and a refractive area, and the refractive area has a curved surface, using optical The refractive area of the component deflects the light above the non-visible area, expanding the viewing angle to reduce dark areas.

Figures 2 and 3 of U.S. Patent No. 5,842,410 disclose a device for increasing the viewing angle of an image wall. A plano-convex lens is placed over the panel to magnify the image to cover the frame. Figures 1, 7 and 8 of U.S. Patent No. 6,380,994 disclose an enlarged viewing angle optical element having a light transmissive planar body and a surface having periodic projections. U.S. Patent No. 7,517,372 discloses an optical component disposed above a liquid crystal display panel such that the image can cover the frame to enlarge the display area.

The present invention provides an optical component that is thin overall and that can be used on a display device to provide a display device with a frameless visual effect.

The invention further provides a display module which adopts the above-mentioned optical component to exhibit a visual effect without a frame.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein.

In order to achieve one or a part or all of the above or other objects, an embodiment of the present invention provides an optical component adapted to be disposed on a display surface, and the display surface is adapted to provide an image beam. The optical component includes a light-receiving portion on the display surface, wherein the light-receiving portion includes a light-incident surface, a light-emitting surface, and a bearing surface. A portion of the image beam is adapted to enter the optical element through the curved surface of the light, and the absolute value of the slope of the incident surface relative to the display surface decreases in a direction away from the display surface. The light-emitting surface has a plurality of surfaces and a plurality of connecting surfaces, wherein each of the connecting surfaces connects adjacent surfaces, and an absolute value of a slope of each of the connecting surfaces with respect to the display surface is smaller than that of the adjacent connecting surfaces relative to the display surface The absolute value of the slope. The absolute value of the slope of the surface relative to the display surface decreases in a direction away from the display surface, wherein a portion of the image beam from the curved surface of the light is adapted to exit the optical element through the exit surface. The bearing surface is connected to the light surface and the light surface.

Another embodiment of the present invention provides a display module including a display device and an optical component. The display device has a display area and a non-display area, and the non-display area is located around the display area, and the display area is adapted to provide an image beam. The optical component is disposed on the display area and the non-display area, and the optical component includes a light-receiving part, wherein the light-receiving part is located on the display area and the non-display area. The light-receiving portion includes a light-incident surface, a light-emitting surface, and a bearing surface. A portion of the image beam is adapted to enter the optical element through the curved surface of the light, and the absolute value of the slope of the incoming curved surface relative to the display device decreases in a direction away from the display device. The light exiting curved surface has a plurality of surfaces and a plurality of connecting surfaces, wherein each connecting surface connects adjacent surfaces. The absolute value of the slope of each of the connection faces relative to the display device is less than the absolute value of the slope of the adjacently connected surface relative to the display device. The absolute value of the slope of the surface relative to the display device decreases in a direction away from the display device, wherein a portion of the image beam from the curved surface of the light is adapted to exit the optical element through the exit surface. The bearing surface is located on the non-display area and is connected to the light surface and the light surface.

In an embodiment of the invention, the light incident surface is a smooth curved surface, and the angle between the tangential direction of the end surface of the light incident surface and the end surface of the bearing surface is ψ, wherein 70° ≦ψ≦ 90 °. In an embodiment of the invention, the refractive index of the optical element is n, the light incident surface is orthographically projected onto the display surface/display device and the width along a first direction is d, and the bearing surface is along the first direction. The width is x, the vertical distance of the light exiting surface from the end of the display surface/display device to the bearing surface is y, and the optical component satisfies the following formula:

In an embodiment of the invention, the light incident surface is formed by a plurality of planes, and the absolute values of the slopes of the planes relative to the display surface/display device decrease in a direction away from the display surface/display device. In an embodiment of the invention, the angle between the plane connecting the bearing surface and the bearing surface in these planes is ψ, wherein 70° ≦ψ≦ 90°. In an embodiment of the invention, the refractive index of the optical element is n, the light incident surface is orthographically projected onto the display surface/display device and the width along a first direction is d, and the bearing surface is along the first direction. The width is x, and the vertical distance of the light-emitting surface from the end of the display surface/display device to the bearing surface is y, and the optical component satisfies the following formula:

In one embodiment of the invention, the planes of the light incident surface correspond to the surfaces of the light exiting surface, respectively, and each of the planes is parallel to each of the corresponding surfaces.

In one embodiment of the invention, the planes of these planes are projected onto the display surface/display device to be equal.

In one embodiment of the invention, the area of the surfaces decreases with distance from the display surface/display device.

In an embodiment of the invention, the optical component further includes a flat plate portion disposed on the display surface/display device and connected to the light-receiving portion, and the flat plate portion has a light-incident surface and a light-emitting surface, and the light-incident surface and the light-incident surface The curved surfaces are connected, and the light emitting surface is connected to the light emitting surface, wherein a part of the image light beam is adapted to enter the optical element through the light incident surface, and a part of the image light beam from the light incident surface is adapted to exit the optical element through the light emitting surface.

In an embodiment of the invention, the display device comprises a liquid crystal display device, an organic light emitting diode display device or a plasma display device.

Embodiments of the invention have at least one of the following advantages. Since the absolute value of the slope of each connecting surface of the light-emitting surface with respect to the display surface is smaller than the absolute value of the slope of the adjacent connected surface with respect to the display surface, the overall thickness of the optical element can be effectively reduced. In addition, the optical component adopts a design of a light-incident curved surface and a light-emitting curved surface to emit a part of the image light beam above the non-display area of the display device, thereby achieving a visual effect without a border.

The above described features and advantages of the present invention will be more apparent from the following description.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

1A is a partial top plan view showing an optical component applied to a display device according to an embodiment of the present invention, FIG. 1B is a cross-sectional view taken along line AA' of FIG. 1A, and FIG. 2 is an optical component illustrated in FIG. 1B. Applied to a partially enlarged view on the display device. Referring to FIG. 1A, FIG. 1B and FIG. 2, the optical component 100 of the present embodiment is adapted to be disposed on a display device 200, and a display module 300 can be formed. The display device 200 has a display area 210 and a non-display. The display area 220 has a display surface 210a, and the display surface 210a is adapted to provide an image light beam 212. The non-display area 220 is, for example, a bezel of the display device 200 or a peripheral circuit area of the display device 200. In the embodiment, the display device 200 is, for example, a liquid crystal display device, an organic light emitting diode display device, or a plasma display device.

The optical component 100 is disposed on the display area 210 and the non-display area 220. The optical component 100 is made of a light transmissive material, and the optical component 100 includes a light-receiving part 110. The light-receiving part 110 is located in the display area 210 and the non-display area. 220, as shown in Figure 1B and Figure 2. The light-receiving portion 110 includes a light-incident surface 112, a light-emitting surface 114, and a bearing surface 116. The bearing surface 116 is located on the non-display area 220 and connected to the light curved surface 112 and the light-emitting surface 114. The partial image beam 212 is adapted to enter the optical element 100 through the light incident surface 112, and the absolute value of the slope of the light incident surface 112 relative to the display surface 210a decreases in a direction away from the display surface 210a, as shown in FIG. 1B and FIG. . In this embodiment, the light incident surface 112 may be a smooth curved surface, and the angle between the tangential direction T1 of the light incident surface 112 and the extending direction of the bearing surface 116 of the end surface of the light incident surface 112 is ψ, wherein 70° ≦ψ≦90°. In detail, when the image beam 212 is transmitted to the light incident surface 112, it is usually transferred from the medium to the dense medium, for example, air enters the optical element 100, so that the image beam 212 is transmitted to the light incident surface 112. It is refracted into the optical element 100. In addition, when the angle is between 70° and 90°, the area of the light incident surface 112 projected onto the display area 210 can be effectively reduced, and the thickness of the entire refractive unit 110 can be effectively reduced. In other words, if the angle ψ is less than 70°, the overall thickness of the refracting portion 110 is relatively increased.

Referring to FIG. 1B and FIG. 2, the light-emitting curved surface 114 has a plurality of surfaces 114a and a plurality of connecting surfaces 114b, wherein each connecting surface 114b connects adjacent surfaces 114a. In particular, the absolute value of the slope of each of the connecting faces 114b relative to the display face 210a is less than the absolute value of the slope of the adjacently joined faces 114a relative to the display face 210a, as shown in FIG. As a result, the overall thickness of the refractive portion 110 is reduced. For example, since the absolute value of the slope of each of the connecting surfaces 114b relative to the display surface 210a is smaller than the absolute value of the slope of the adjacent connecting surface 114a with respect to the display surface 210a, When the virtual smooth surface 113 is illustrated in FIG. 2, it can be clearly found that the thickness of the light-receiving portion 110 can be effectively reduced by using the light-emitting curved surface 114 of the present embodiment, thereby reducing the thickness of the optical element 100 as a whole.

In addition, the absolute value of the slope of the surface 114a relative to the display surface 210a in the light-emitting curved surface 114 decreases in a direction away from the display surface 210a, as shown in FIG. 2, and a portion of the image beam 212 from the light-incident curved surface 112 is adapted. The light emitting surface 114 is emitted through the light emitting surface 114. In detail, the slope of the surface 114a can be appropriately selected to correspond to the slope on the light incident surface 112, so that the image beam 212 refracted by the light incident surface 112 can be again refracted by the light exit surface 114 when it is transmitted to the light exit surface 114. In optical component 100, as shown in FIG.

In an embodiment, the light incident surface 112 may be connected by a plurality of planes 112a, wherein the absolute value of the slope of the planes 112a relative to the display surface 210a decreases in a direction away from the display device 200, as shown in FIG. The embodiment shown. In the embodiment of Fig. 3, the angle between the plane 112a that is connected to the bearing surface 116 and the direction in which the bearing surface 116 extends is ψ, where 70° ≦ψ≦ 90°. In addition, each plane 112a of the light incident surface 112 may correspond to each surface 114a of the light exit surface 114, and each plane 112a is parallel to the corresponding surface 114a, and thus the image refracted by the light incident surface 112 The light beam 212 is also refracted by the light exit surface 114 to be emitted to the light-receiving portion 110 when transmitted to the light-emitting curved surface 114. Since each plane 112a is parallel to the corresponding surface 114a, it conforms to Snell's law. :n ₁ sin θ ₁ =n ₂ sin θ ₂ =n ₃ sin θ ₃ , the transmission direction of the image beam 212 emerging from the refracting portion 110 is parallel to the transmission direction of the image beam 212 when incident on the refracting portion 110, as shown in the figure. 3 is shown. In the present embodiment, the areas on which the plane 112a is projected onto the display surface 210a may be equal to or different from each other.

In the embodiment of FIG. 2 and FIG. 3, a portion of the image beam 212 provided by the display region 210 is refracted into the light-receiving portion 112 when it is transmitted to the light-incident curved surface 112 of the light-receiving portion 110, and is then refracted by the light-incident surface 112. The image beam 212 is again refracted by the light exiting surface 114 and exits the light-receiving portion 110. Since the light-emitting curved surface 114 is located on the non-display area 220 and a portion of the display area 210, the image light beam 212 can be emitted above the non-display area 220. In other words, when the display module 300 is displaying the screen, the non-display area 220 can be blocked by the partial image beam 212 that is emitted from the light-emitting surface 114. Therefore, the user does not see the screen provided by the display module 300. When you see a portion of the non-display area 220 (such as a border), you can present a borderless visual effect.

It should be noted that the image beam 212 emerging from the non-display area 220 is a partial image beam 212 provided by the projection area A1 projected onto the display area 210 by the light incident surface 112, wherein the area of the projection area A1 is smaller than the light output area. The curved surface 114 is projected onto the non-display area 220 and the projection area A2 on the display area 210. Therefore, in order to prevent the display screen of the display module 300 on which the optical element 100 is disposed on the non-display area 220 from being distorted or blurred, Therefore, the image beam 212 provided by the projection area A1 on the display area 210 can be adjusted by controlling each pixel (not shown) on the projection area A1. In other words, the refracting portion 110 can similarly enlarge the image of the display region 210 of the portion adjacent to the non-display region 220 to the upper portion of the non-display region 220, thereby producing a borderless visual effect, in order to avoid being presented in the non-display region 220. The upper picture and the picture above the display area 210 are discontinuous, and the above problem can be avoided by appropriately adjusting the light provided by each pixel on the projection area A1.

In the present embodiment, the area of the surface 114a described above may decrease in a direction away from the display surface 210a, as shown in FIGS. 2 and 3. In addition, in order to make the optical element 100 thinner, the overall thickness of the optical element 100 illustrated in FIG. 2 and FIG. 3 can satisfy the following formula:

The refractive index of the optical element 100 is n, the light incident surface 112 is projected onto the display surface 210a and the width along a first direction P1 is d, and the width of the bearing surface 116 along the first direction P1 is x, and the light is emitted. The vertical distance of the curved surface 114 in the extending direction from the end far from the display surface 210a to the bearing surface 116 is y, which is the thickness of the optical element 100 as a whole.

In the embodiment of FIG. 2 and FIG. 3, the optical component 100 further includes a flat plate portion 120. The flat plate portion 120 is disposed on the display surface 210a and connected to the light-receiving portion 110, as shown in FIGS. 2 and 3. The flat portion 120 has a light incident surface 122 and a light exit surface 124. The light incident surface 122 is connected to the light incident surface 112, and the light exit surface 124 is connected to the light exit surface 114. In addition, the image beam 212 from the display area 210 can enter the optical element 100 through the light incident surface 122, and the image light beam 212 passing through the light incident surface 122 can pass through the light exit surface 124 to be emitted to the optical element 100.

It is worth mentioning that the optical component 100 can also be integrated with the non-display area 220 of the display device 200. For example, if the non-display area 220 is a frame, the light-receiving portion 110 of the optical element 100 of the present embodiment can be used as the frame of the display device 200, so that the overall thickness of the display module 300 can be further reduced.

In summary, the embodiments of the present invention can achieve at least one of the following effects. Since the absolute value of the slope of each connecting surface of the light-emitting surface with respect to the display surface is smaller than the absolute value of the slope of the adjacent connected surface with respect to the display surface, the overall thickness of the optical element can be effectively reduced. In addition, since the optical component adopts a design of the light-incident curved surface and the light-emitting curved surface to emit a part of the image light beam above the non-display area of the display device, the visual effect without the border can be achieved. Furthermore, if the optical component is integrated into the non-display area of the display module, that is, as the frame of the display module, the overall thickness of the display module can be further reduced.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.

100. . . Optical element

110. . . Refractive section

112. . . Light surface

112a. . . flat

113. . . Virtual smooth surface

114. . . Light surface

114a. . . surface

114b. . . Connection surface

116. . . Bearing surface

120. . . Flat section

122. . . Glossy surface

124. . . Glossy surface

200. . . Display device

210. . . Display area

210a. . . Display surface

212. . . Image beam

220. . . Non-display area

300. . . Display module

A1, A2. . . Projection area

d, x. . . width

P1. . . First direction

y. . . distance

T1. . . Tangent direction

Hey. . . Angle

1A is a partial top plan view showing an optical component applied to a display device according to an embodiment of the invention.

1B is a schematic cross-sectional view taken along line AA' of FIG. 1A.

2 is a partial enlarged view of the optical element illustrated in FIG. 1B applied to a display device.

3 is a partial enlarged view showing another embodiment of the light incident curved surface of the optical component illustrated in FIG. 1B.

100. . . Optical element

110. . . Refractive section

112. . . Light surface

114. . . Light surface

116. . . Bearing surface

120. . . Flat section

122. . . Glossy surface

124. . . Glossy surface

200. . . Display device

210. . . Display area

210a. . . Display surface

212. . . Image beam

220. . . Non-display area

300. . . Display module

Claims (20)

An optical component is disposed on a display surface, and the display surface is adapted to provide an image light beam, the optical component includes: a light-receiving portion disposed on the display surface, and the light-receiving portion includes: a light-incident surface Part of the image beam is adapted to enter the optical element through the light incident surface, and an absolute value of a slope of the light incident surface relative to the display surface decreases in a direction away from the display surface; a light surface having a plurality of surfaces And a plurality of connecting surfaces, each of the connecting surfaces connecting the adjacent surfaces, and an absolute value of a slope of each of the connecting surfaces relative to the display surface is smaller than a slope of the surfaces of the adjacent connecting surfaces relative to the display surface Absolutely, the absolute value of the slope of the surface relative to the display surface decreases in a direction away from the display surface, wherein a portion of the image beam from the light incident surface is adapted to exit the optical element through the light exiting curved surface; And a bearing surface connecting the light incident surface and the light emitting surface. The optical component of claim 1, wherein the light incident surface is a smooth curved surface, and an angle between a tangential direction of the end face connected to the bearing surface and an extending direction of the bearing surface is Oh, 70°≦ψ≦90°. The optical component of claim 2, wherein the optical component has a refractive index n, and the light incident surface is projected onto the display surface and has a width d in a first direction, the bearing surface The width along the first direction is x, the vertical distance of the light exiting surface from the end far from the display surface to the extending direction of the bearing surface is y, and the optical component satisfies the following formula: The optical component of claim 1, wherein the light incident surface is formed by connecting a plurality of planes, and an absolute value of the slopes of the planes relative to the display surface decreases in a direction away from the display surface. The optical component of claim 4, wherein an angle between the plane connected to the bearing surface and the bearing surface in the planes is ψ, wherein 70° ≦ψ≦ 90°. The optical component of claim 5, wherein the optical component has a refractive index n, and the light incident surface is projected onto the display surface and has a width d in a first direction, the bearing surface The width along the first direction is x, and the vertical distance of the light exiting surface from the end away from the display surface to the extending direction of the bearing surface is y, and the optical component satisfies the following formula: The optical component of claim 4, wherein the planes of the light incident surface respectively correspond to the surfaces of the light exiting curved surface, and each of the planes is parallel to each of the corresponding surfaces. The optical component of claim 4, wherein the planes are orthographically projected onto the display surface by an equal area. The optical component of claim 1, wherein the areas of the surfaces decrease in a direction away from the display surface. The optical component of claim 1, further comprising a flat plate portion disposed on the display surface and connected to the light-receiving portion, wherein the flat plate portion has a light-incident surface and a light-emitting surface, the light-incident surface The light-emitting surface is connected to the light-emitting surface, and the light-emitting surface is connected to the light-emitting surface, wherein a part of the image light beam is adapted to enter the optical element through the light-incident surface, and a part of the image light beam from the light-incident surface is adapted to exit through the light-emitting surface For the optical component. A display module includes: a display device having a display area and a non-display area, the non-display area is located around the display area, and the display area is adapted to provide an image beam; and an optical component is disposed on the display The optical component includes a light-receiving portion on the display area and the non-display area, and the light-receiving portion includes: a light incident surface, and the image beam is adapted to enter through the light-incident surface The optical component, and the absolute value of the slope of the light incident surface relative to the display device decreases in a direction away from the display device; a light surface having a plurality of surfaces and a plurality of connecting surfaces, each of the connecting surfaces being connected Adjacent to the surfaces, and the absolute value of the slope of each of the connecting surfaces relative to the display device is less than the absolute value of the slope of the adjacent connected surfaces relative to the display device, the slope of the surfaces relative to the display device The absolute value decreases in a direction away from the display device, wherein a portion of the image beam from the light incident surface is adapted to exit the optical element through the light exiting surface ; A bearing surface, located on the non-display region and connected to the light incident surface and the light exit surface. The display module of claim 11, wherein the light incident surface is a smooth curved surface, and an angle between a tangential direction of the end face connected to the bearing surface and an extending direction of the bearing surface For ψ, 70° ≦ψ≦ 90°. The display module of claim 12, wherein the optical element has a refractive index n, and the light incident surface is orthographically projected onto the display device and has a width d in a first direction, the bearing The width of the face along the first direction is x, and the vertical distance of the light exiting surface in the extending direction from the end of the display device to the bearing surface is y, and the optical component satisfies the following formula: The display module of claim 11, wherein the light incident surface is connected by a plurality of planes, and an absolute value of the slopes of the planes relative to the display device decreases in a direction away from the display device. . The display module of claim 14, wherein an angle between the plane connected to the bearing surface and the bearing surface in the planes is ψ, wherein 70° ≦ψ≦ 90°. The display module of claim 15, wherein the optical element has a refractive index n, and the light incident surface is orthographically projected onto the display device and has a width d in a first direction, the bearing The width of the face along the first direction is x, and the vertical distance of the light exiting surface in the extending direction from the end of the display device to the bearing surface is y, and the optical component satisfies the following formula: The display module of claim 14, wherein the planes of the light incident surface respectively correspond to the surfaces of the light exiting curved surface, and each of the planes is parallel to each of the corresponding surfaces. The display module of claim 11, wherein the surface area decreases in a direction away from the display device. The display module of claim 11, wherein the optical component further comprises a flat portion disposed on the display area and connected to the refractive portion, and the flat portion has a light incident surface and a light exit surface, The light incident surface is connected to the light incident surface, and the light emitting surface is connected to the light emitting curved surface, wherein a part of the image light beam is adapted to enter the optical component through the light incident surface, and a part of the image light beam from the light incident surface is adapted to pass through the light incident surface The light exit surface exits the optical element. The display module of claim 11, wherein the display device comprises a liquid crystal display device, an organic light emitting diode display device or a plasma display device.