TWI581225B - Display device - Google Patents

Description

Display device

The present invention relates to a display device, and more particularly to a display device having a frameless display effect.

In recent years, in order to maximize the size of the screen, the display panel of the narrow bezel has been widely used in various devices. In order to realize a large-sized display device, the concept and application of splicing a plurality of display panels have gradually emerged. However, when a plurality of display panels are spliced into one large display device, the frame width of the display panel often causes discontinuity at the interface between adjacent display panels, as shown in FIG. In FIG. 1 , the display device 1 includes a first display panel 10 and a second display panel 20 that are in contact with each other, wherein an image 12 displayed by the first display panel 10 and an image 22 displayed by the second display panel 20 are present. There is a significant gap 30, and the gap 30 is substantially caused by the bezel of the first display panel 10 and the second display panel 20. In order to reduce the gap 30, the first display panel 10 and the second display panel 20 tend to adopt a narrow bezel design, but still cannot achieve an ideal display image.

The present invention provides a display device having a frameless design and having an ideal edge display quality.

A display device of the present invention includes a first substrate, a plurality of first display pixels, and a plurality of second display pixels. The first substrate has at least a first planar region and a first bent region adjacent to the first planar region. The first bending zone is curved into an arc shape and is not parallel to the first plane zone. The first display pixels are disposed in the first planar region of the first substrate, and a pitch between the first display pixels is constant. The second display pixel is disposed in the first bending region of the first substrate. The spacing between the second display pixels is gradually increased from a first boundary between the first planar region and the first curved region away from the first planar region.

Based on the above, the display device of the embodiment of the present invention has a display pixel of the bending region and a display pixel of the planar region, and the bending region of the display device is bent to be non-parallel to the planar region. The display pixels of the bending zone have an inconsistent spacing design, so that the user can feel that the display effect of the bending zone is substantially the same as the plane area when viewing the display screen. By splicing the bending regions of the two display devices together, a large-sized display panel with good display quality can be obtained.

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

1, 100, 200, 300, 400‧‧‧ display devices

10‧‧‧First display panel

12, 22‧‧‧ images

20‧‧‧Second display panel

30‧‧‧ gap

102, 202, 302A‧‧‧ first flat area

104, 204, 304A‧‧‧ first bend zone

106, 206‧‧‧ first junction

108, 208‧‧‧Predicted display plane

110, 210‧‧‧ substrate

120, 220, 320A‧‧‧ first display pixels

130, 230, 330A‧‧‧ second display pixels

232‧‧ ‧ pixel boundary

300A‧‧‧First sub display device

300B‧‧‧Second sub display device

302B‧‧‧Second Planar Area

304B‧‧‧second bend zone

310A‧‧‧First substrate

310B‧‧‧second substrate

320B‧‧‧ third display pixel

330B‧‧‧ fourth display pixel

402‧‧‧ flat area

404A, 404B‧‧‧ bending zone

A‧‧‧ angle

BD‧‧‧ widest rim

DA, DB‧‧ direction

F‧‧‧Area

H‧‧‧ horizontal distance

I-I‧‧‧ line

L‧‧‧ virtual cable

l‧‧‧Vertical distance

l' _N , Z _N ‧‧‧ distance

LP‧‧‧ intersection

O, U‧‧ points

R‧‧‧ radius of curvature

X, Y‧‧‧ spacing

Z‧‧‧Set spacing

ZP‧‧‧Prescribed pixel boundary

θ _N ‧‧‧ arc angle

1 is a schematic view of a conventional display device.

2 is a schematic view of a display device according to a first embodiment of the present invention.

3A is a schematic view of a display device according to a second embodiment of the present invention.

FIG. 3B is a partially enlarged schematic view showing a region F of the display device of FIG. 3A.

4A is a top plan view showing a display device of a third embodiment of the present invention.

4B is a cross-sectional view of the display device of FIG. 4A taken along line I-I.

FIG. 5 is a partial schematic view of a display device according to another embodiment of the present invention.

2 is a schematic view of a display device according to a first embodiment of the present invention. Referring to FIG. 2 , the display device 100 includes a substrate 110 , a plurality of first display pixels 120 , and a plurality of second display pixels 130 . The substrate 110 has at least a first planar region 102 and a first folded region 104 adjacent to the first planar region 102. The first bend region 104 is curved into an arc shape and is not parallel to the first planar region 102. The first display pixels 120 are disposed in the first planar region 102 of the substrate 110, and the pitch X between the first display pixels 110 is constant. The second display pixel 130 is disposed in the first bending region 104 of the first substrate 110. The spacing Y between the second display pixels 130 is gradually increased from the first interface 106 between the first planar region 102 and the first bending region 104 away from the first planar region 102.

In this embodiment, the first display pixel 120 and the second display pixel 130 are both organic light emitting display pixels, but may also be selected as an electrophoretic display pixel, an electrowetting display pixel or a liquid crystal display pixel. The substrate 110 has a flexible property, and the substrate 110 of the first bending region 104 is adapted to be disposed in a predetermined bending state. In this implementation In the example, the first bending region 104 has a bending amplitude greater than 90 degrees, that is, the curved surface of the first bending region 104 is bent, and the arc angle is greater than 90 degrees, which causes the display device 100 to be in the first bending region. 104 has a borderless design. That is, the display screen in the first bending zone 104 can be expanded to the widest outer edge BD of the display device 100.

The size of the pitch Y between the second display pixels 130 is related to the degree of bending of the first bending region 104. In particular, the pitch X or Y can be regarded as one side of the display area of the display pixel to the display area of the next display pixel, and the display area of the display pixel is proportional to the size of the pitch. That is, in the present embodiment, an increase in the pitch indicates that the display area of the display pixel also increases. Specifically, the spacing X between the first display pixels 120 is a fixed value X ₀ , and the spacing Y between the Nth second display pixel 130 and the (N+1)th second display pixel 130 is Y _N , then X ₀ = Y _N *cosA _N , where N is a positive integer, and A _N is the angle A between the Nth second display pixel 130 and the predetermined display plane 108. In addition, A _N may be substantially substituted for the angle between the tangent of the center point of the Nth second display pixel 130 and the predetermined display plane 108. In the present embodiment, the predetermined display plane 108 is, for example, the plane in which the outer surface of the first planar region 102 is located. Thus, the first planar region 102 is parallel to the predetermined display plane 108. That is to say, when the user views the screen displayed by the display device 100, it is felt that the screen is presented on the predetermined display plane 108. In other embodiments, the predetermined display plane 108 is, for example, a surface that runs on the outer surface of the first planar region 102, and the predetermined display plane 108 and the outer surface of the first planar region 102 may be separated by a distance. The predetermined display plane 108 can here be regarded as a plane on which the display screen of the display device 100 is imaged.

In this embodiment, the second display pixel 130 on the first bending region 104 has a non-uniform pitch Y, and the second display pixel 130 is sized to conform to X ₀ =Y _N *cosA _N . When the second display pixel 130 displays a picture, the vertical width of the picture displayed by the second display pixel 130 onto the predetermined display plane 108 may be substantially equal to the size of the pitch X, that is, X ₀ . Therefore, the picture displayed by the second display pixel 130 and the picture displayed by the first display pixel 120 have the same size on the predetermined display plane 108 without deformation or distortion of the edge picture, which helps to enhance the display. The display quality of the device.

3A is a schematic view of a display device according to a second embodiment of the present invention, and FIG. 3B is a partially enlarged schematic view of a region F of the display device of FIG. 3A. Referring to FIGS. 3A and 3B , the display device 200 includes a substrate 210 , a plurality of first display pixels 220 , and a plurality of second display pixels 230 . The substrate 210 has at least a first planar region 202 and a first folded region 204 adjacent the first planar region 202. The first bend region 204 is curved into an arc shape and is not parallel to the first planar region 202. The first display pixels 220 are disposed in the first planar region 202 of the substrate 210, and the pitch X between the first display pixels 210 is constant. The second display pixel 230 is disposed in the first bending region 204 of the first substrate 210. The pitch Y size of the second display pixel 230 may vary depending on the position of the second display pixel 230. In the present embodiment, the spacing Y between the second display pixels 230 is gradually increased by the first boundary 206 between the first planar region 202 and the first bending region 204 away from the first planar region 202. The pitch X or Y can be regarded as one side of the display area of the display pixel to the display area of the next display pixel, and the display area of the display pixel is proportional to the size of the pitch. Also That is to say, in the present embodiment, an increase in the pitch indicates that the display area of the display pixel also increases.

In this embodiment, the first display pixel 220 and the second display pixel 230 are both organic light emitting display pixels, but may also be selected as an electrophoretic display pixel, an electrowetting display pixel or a liquid crystal display pixel. The substrate 210 has a flexible property, and the substrate 210 of the first bending region 204 is adapted to be disposed in a predetermined bending state. In this embodiment, the bending width of the first bending region 204 is greater than 90 degrees, that is, the curved surface of the first bending region 204 is bent, and the arc angle is greater than 90 degrees, which makes the display device 200 at the first The bend region 204 has a borderless design.

Specifically, the pitch Y of the second display pixel 230 is designed in accordance with the following conditions. The second display pixel 230 defines M pixel boundaries 232 from the number of first boundaries 206 that are sequentially spaced away from the first planar region 202, where M is a positive integer. The plane in which the outer surface of the first planar region 202 is located is set to a predetermined display plane 208. M predetermined pixel boundaries ZP arranged outwardly by the first boundary 206 are disposed on the predetermined display plane 208, and the predetermined pixel boundaries ZP are spaced apart from each other by a set pitch Z. At this time, the Nth pixel boundary 232 and the Nth predetermined pixel boundary ZP are linearly connected to define a virtual virtual connection line L, and the inclination of the connection line L can be set such that the M virtual connection lines L are outward. The extension intersects at a point U (shown in Figure 3A), where N is a positive integer and N is one of 1~M. In other embodiments, the predetermined display plane 208 is, for example, one surface that runs on the outer surface of the first planar region 202, and the predetermined display plane 208 and the outer surface of the first planar region 202 may be separated by a distance. The predetermined display plane 208 can be regarded as the display device 200 here. The plane on which the picture is imaged.

In this embodiment, if the size of the set spacing Z is equal to the size of the spacing X of the first display pixel 220, the user presents the screen presented by the first planar area 202 when the user views the screen displayed by the display device 200 at the point U. The screen presented by the first bending zone 204 will have substantially the same resolution, and the phenomenon that the edge image is distorted or deformed does not occur. At the same time, the display device 200 can also provide a borderless display effect, that is, the display screen can be expanded to the widest outer edge of the display device 200 at the first bending region 204.

When the pitch Y of the second display pixel 230 is set in the above manner, the screen displayed by each of the second display pixels 230 is projected to the predetermined display plane 208 along the viewing direction (for example, the extending direction of the virtual connecting line L) viewed by the user. There is a set size, and its size may be equal to the size of the picture displayed on the predetermined display plane 208 by the first display pixel 220 (that is, the pitch X of the first display pixel 220). Therefore, although the first bending region 204 is not parallel to the first planar region 202, the image presented by the display device 200 does not suffer from distortion or deformation of the edge image.

In addition, the present embodiment can also use a mathematical formula to derive the relationship between the pitch Y of the second display pixel 230 and the position of the second display pixel 230. 3A and 3B, it is assumed that the point U has a vertical distance l from the predetermined display plane 208, and the point U vertically projected onto the predetermined display plane 208 is separated from the first boundary 206 by a horizontal distance h, then the virtual connection The intersection L of the line L intersecting the first boundary 206 is separated from the predetermined display plane 208 by a distance l', and the Nth intersection point LP Where N is N of the Nth second display pixel 230 and d is the size of the set pitch Z. In the present embodiment, the size (d) of the set pitch Z may be designed to be equal to the size of the pitch X of the first display pixel 220. Further, when the first bending region 204 to point O as a center of curvature and is bent along a radius of curvature r, the N-th pixel from the second display 230 corresponding to a first predetermined boundary pixel boundary ZP 206 Z _N The size may be set to Z _N = N × d = r × sin θ _N × fn (Formula 1), where θ _N is the arc angle between the Nth second display pixel 230 and the first boundary 206. When the predetermined display plane 208 is the outer surface of the first planar area 202, . Available from Equation 1 and Equation 2 3). After that, the size Y of the pitch Y corresponding to the Nth second display pixel 230 is Y _N = r × ( θ _N - θ _{N -1} ), where θ _N and θ _N-1 can be obtained by Equation 3. .

The pitch Y of the second display pixel 230 is designed according to the above formula, so that the picture displayed by each second display pixel 230 can be projected to a predetermined display plane along the viewing direction (for example, the extending direction of the virtual connecting line L) viewed by the user. The 208 hour has a fixed size and is equal in size to the size of the picture displayed on the predetermined display plane 208 by the first display pixel 220. Therefore, although the first bending region 204 is not parallel to the first planar region 202, the image presented by the display device 300 does not suffer from distortion or deformation of the edge image.

4A is a top plan view showing a display device according to a third embodiment of the present invention, and FIG. 4B is a cross-sectional view of the display device of FIG. 4A along line I-I. Referring to FIG. 4, the display device 300 includes a first sub display device 300A and a second sub display device 300B. The first sub display device 300A includes a first substrate 310A and a plurality of The display pixel 320A and the plurality of second display pixels 330A, and the second sub display device 300B includes a second substrate 310B, a plurality of third display pixels 320B, and a plurality of fourth display pixels 330B. In the first sub-display device 300A, the first substrate 310A has a first planar region 302A and a first bent region 304A, and the first display pixel 320A is disposed in the first planar region 302A and the second display pixel 330A is disposed. In the first bending zone 304A. In the second sub-display device 300B, the second substrate 310B has a second planar region 302B and a second bent region 304B, and the third display pixel 320B is disposed in the second planar region 302B and the fourth display pixel 330B is set. In the second bending zone 304B.

At the same time, the first bending zone 304A of the first substrate 310A and the second bending zone 304B of the second substrate 310B are in contact with each other such that the first bending zone 304A and the second bending zone 304B are located in the first plane zone 302A and The second planar area 302B is formed to constitute the display device 300. In the present embodiment, the first sub-display device 300A can adopt the design of the display device 100 of the first embodiment, the display device 200 of the second embodiment, or other display devices having the same display effect. Similarly, the second sub-display device 300B can adopt the design of the display device 100 of the first embodiment, the display device 200 of the second embodiment, or other display devices having the same display effect.

In the pixel size design of the foregoing embodiment, the screen size (that is, the display area of the display pixels) displayed by the second display pixel 330A viewed by the user is substantially the same as the resolution of the first display pixel 320A. The size and resolution of the rendered picture. At the same time, the screen size and resolution displayed by the fourth display pixel 330B are substantially the same as the screen size and resolution presented by the third display pixel 320B. Therefore, both the first sub display device 300A and the second sub display device 300B have ideal edges. Display quality and have a borderless display. When the display device 300 displays a screen, the screen is not cut into different blocks but presents a continuous, uninterrupted, undistorted, and undistorted picture. Therefore, the display device 400 can effectively improve the defect of the display screen interruption of the spliced type large-sized display device. At the same time, the display device 400 has good display quality at the splicing.

FIG. 5 is a partial schematic view of a display device according to another embodiment of the present invention. Referring to FIG. 5, display device 400 has a planar region 402 and a plurality of bend regions 404A and 404B, wherein different bend regions 404A and 404B are located on different sides of planar region 402. The design of the display pixel of the bending region 404A and the display pixel of the planar region 402 in the direction DA can be referred to the design of the planar region and the bending region of any of the above embodiments. Similarly, the size of the display pixel of the bending region 404B and the display pixel of the planar region 402 in the direction DB may refer to the design of the planar region and the bending region of any of the above embodiments. Therefore, the display device 400 can have a frameless design in different directions DA and DB, and the display effects exhibited by the bending regions 404A and 404B can be approximated to the display effects presented by the planar region 402. In this way, the display device 400 can have a good edge display effect. When the display device 400 is spliced into another large display with the display device having the above-mentioned bending region design, the display image of the large display is not interrupted at the splicing portion. There will be no distortion of the picture.

In summary, in the display device of the embodiment of the invention, the substrate has a flat area and a bending area, and the display pixels in the flat area have a fixed pitch, and the pixels in the bending area are farther away from the plane area, and the spacing is longer. Big trend. As a result, the user view Looking at the picture in the plane area and viewing the picture in the bending area can obtain the same visual experience, that is, the picture in the bending area is not distorted or deformed. In addition, the bending zone is located at the edge of the display device to achieve a borderless effect. A display device according to another embodiment of the present invention includes two substrates, each of which includes a planar region and a bent region, and the bent regions of the two substrates are joined together to form a large-sized display device. Further, in each of the substrates, the display pixels in the planar region have a fixed pitch, and the pixels in the bent region exhibit a tendency to have a larger pitch as they are farther away from the planar region. In this way, the large-sized display device can exhibit an ideal display quality in which the display screen is continuous at the substrate connection without distortion.

300‧‧‧ display device

300A‧‧‧First sub display device

300B‧‧‧Second sub display device

302A‧‧‧ first flat area

302B‧‧‧Second Planar Area

304A‧‧‧First bend zone

304B‧‧‧second bend zone

310A‧‧‧First substrate

310B‧‧‧second substrate

320A‧‧‧ first display pixel

320B‧‧‧ third display pixel

330A‧‧‧Second display pixels

330B‧‧‧ fourth display pixel

Claims (19)

A display device includes: a first substrate having at least a first planar region and a first bending region adjacent to the first planar region, the first bending region being curved into an arc shape and not parallel to The first planar area; the plurality of first display pixels are disposed in the first planar area of the first substrate, the distance between the first display pixels is a fixed value; and the plurality of second displays a pixel disposed in the first bending region of the first substrate, wherein a spacing between the second display pixels is a first boundary between the first planar region and the first bending region The distance from the first planar area is gradually increased, wherein the second display pixels define M boundary boundaries by the number M of the first boundary away from the first planar area, and M is a positive integer, and When a predetermined pixel boundary is arranged on the predetermined display plane and arranged by the first boundary and spaced apart from each other by a set pitch, the Nth pixel boundary is linearly connected with the Nth predetermined pixel boundary. a virtual connection line, and the M virtual connection lines intersect at a point, where N is a positive integer, Wherein N is one of 1 ~ M. The display device of claim 1, wherein the first display pixels are spaced apart from each other by a fixed value X ₀ , and the Nth second display pixel and the N+1th second display The spacing between the pixels is Y _N , then X ₀ = Y _N *cosA _N , N is a positive integer, and A _N is the angle between the Nth second display pixel and the predetermined display plane. The display device of claim 2, wherein the first planar area is parallel to the predetermined display plane. The display device of claim 2, wherein A _N is an angle between a tangent of the Nth second display pixel and the predetermined display plane. The display device of claim 1, wherein the fixed pitch is equal to a distance between the first display pixels. The display device of claim 1, wherein the first planar area is parallel to the predetermined display plane. The display device of claim 1, wherein the first bending region is bent into an arc having an arc angle greater than 90 degrees. The display device of claim 1, further comprising: a second substrate having at least a second planar region and a second bending region adjacent to the second planar region, the second bending The area is curved into an arc shape and is not parallel to the second plane area, and the first bending area is in contact with the second bending area; a plurality of third display pixels are disposed on the second portion of the second substrate In the plane area, the distance between the third display pixels is a fixed value; and a plurality of fourth display pixels are disposed in the second bending area of the second substrate, and the fourth display pictures The spacing between the elements is gradually increased from a second boundary between the second planar region and the second curved region away from the second planar region. The display device of claim 8, wherein the third display pixels are spaced apart from each other by a fixed value X, and the Nth fourth display pixel and the N+1th fourth display picture are The spacing between the elements is Y _N , then X = Y _N *cosA _N , N is a positive integer, and A _N is the angle between the Nth fourth display pixel and the predetermined display plane. The display device of claim 9, wherein the second flat The face area is parallel to the predetermined display plane. The display device of claim 9, wherein A _N is an angle between a tangent of the Nth fourth display pixel and the predetermined display plane. The display device of claim 8, wherein the fourth display pixels define M pixel boundaries by the number of Ms in which the second boundary is arranged away from the second planar region, M is a positive integer, and an Nth pixel boundary and an Nth predetermined pixel boundary are arranged on the predetermined display plane when M predetermined pixel boundaries are sequentially arranged outwardly from the second boundary and spaced apart from each other by a fixed pitch The straight line connection defines a virtual connecting line, and the M pixel boundaries intersect the M virtual connecting lines at a point, where M is a positive integer and N is one of 1~M. The display device of claim 12, wherein the fixed pitch is equal to a distance between the third display pixels. The display device of claim 12, wherein the second planar region is parallel to the predetermined display plane. The display device of claim 8, wherein the second bending region is bent into an arc having an arc angle greater than 90 degrees. The display device of claim 8, wherein the first bending zone and the second bending zone are located between the first planar zone and the second planar zone. The display device of claim 8, wherein the third display pixels and the fourth display pixels are respectively organic light-emitting display pixels. The display device of claim 1, wherein the first display pixels and the second display pixels are respectively organic light-emitting display pixels. The display device of claim 1, wherein a spacing between the first display pixels is proportional to a display area of the first display pixels, and the second display pixels are between each other The pitch is proportional to the display area of the second display pixels.