TW201531769A - Display device - Google Patents

Abstract

A display device is provided. The display device includes a display panel. The display panel has a plurality of pixel regions, and each of the pixel regions has a display region. A virtual center line passes through the center point of the display panel and extends along a first direction. The lengths of the display regions are gradually reduced away from the virtual center line in a second direction vertical to the first direction.

Description

Display device

The present invention relates to a display device, and more particularly to a display device in which the size of a display area decreases as it moves away from the center.

With the rapid development of technology, display panels are everywhere in today's society and are widely used in various electronic products such as tablets, smart phones or flat-panel TVs. The display panel is usually provided with a plurality of display areas of uniform size, and emits uniform light through the display area to provide a user display screen. In general, when the user is viewing the display panel, the gaze is mainly concentrated in the central area of the display panel. Therefore, in the case where the brightness distribution of the entire display panel is uniform, the brightness exhibited by the upper and lower sides of the display panel may cause interference to the user who views the display panel, so that the display panel cannot provide a user's ideal visual effect.

The present invention provides a display device in which a luminance distribution on a display panel is decreased as moving away from a center of the display panel.

The display device of the present invention includes a display panel having a plurality of display panels a pixel area, each pixel area having a display area, wherein a virtual center line extends through a center point of the display panel and along the first direction, and a length of the display area in a second direction perpendicular to the first direction Decrease as you move away from the virtual centerline.

Based on the above, in the display device of the present invention, since the length of the display area decreases as moving away from the virtual center line, the display panel can display the brightness of the central area of the display screen greater than the brightness of the upper and lower sides. , to provide users with a better visual effect.

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

20, 30, 40‧‧‧ display devices

100, 200, 300, 400‧‧‧ display panels

102, 202‧‧‧ Picture area

104, 204, 204R, 204L‧‧‧ display area

206‧‧‧Lighting pattern layer

210, 310, 310a, 410‧‧‧ backlight module

212, 312‧‧‧ light box

214, 316, 316a‧‧‧Lighting elements

216‧‧‧Diffuser

314‧‧‧Light guide plate

318, 318a‧‧‧ light pattern

420‧‧‧ phase retarder

C‧‧‧Virtual Centerline

D ₁ , D ₂ ‧‧‧ directions

L, W‧‧‧ length

P1, P5‧‧‧ height

P2, P3, P4‧‧‧ spacing

RR, RL‧‧‧ phase delay zone

S1‧‧‧ bottom

S2‧‧‧ shiny surface

V‧‧‧ users

1 is a top plan view of a display panel in accordance with an embodiment of the present invention.

2 is a cross-sectional view of a display device in accordance with an embodiment of the present invention.

FIG. 3A is a schematic diagram of brightness distribution of the display panel of FIG. 2. FIG.

FIG. 3B is a schematic diagram of brightness distribution of the backlight module of FIG. 2. FIG.

3C is a schematic view showing a luminance distribution of the display device of FIG. 2.

4A is a schematic cross-sectional view of a display device in accordance with another embodiment of the present invention.

4B is a top plan view of the backlight module of FIG. 4A.

5A and 5B are schematic top views of another backlight module, respectively.

6 is a schematic cross-sectional view of a display device in accordance with another embodiment of the present invention.

Figure 7 is a top plan view of the phase retarder of Figure 6.

Fig. 8A is a partially enlarged schematic view showing a central area of the display device of Fig. 6.

Figure 8B is a partially enlarged schematic view of the lower side of the display device of Figure 6.

1 is a top plan view of a display panel in accordance with an embodiment of the present invention.

Referring to FIG. 1, the display panel 100 has a plurality of pixel regions 102. Each pixel area 102 has a display area 104. In FIG. 1, the pixel regions 102 have the same height P1 in the second direction D ₂ , but the invention is not limited thereto. In other embodiments, the pixel regions 102 may also have different heights P1.

In addition, as shown in FIG. 1 , in the second direction D ₂ , the length L of the display area 104 decreases as moving away from the virtual center line C, wherein the virtual center line C passes through the center point of the display panel 100 and along the second The direction D ₂ extends perpendicular to the first direction D ₁ . That is, when the width of the display area 104 is fixed, the area of the display area 104 decreases as it goes away from the virtual center line C.

In an embodiment, the length L of the display area 104 decreases with respect to the adjacent display area 104 as a distance from the virtual centerline C by 0.07% to 0.1%. In another embodiment, the length L of the display area 104 decreases from 0.060% to 0.098% relative to the adjacent display area 104 as it moves away from the virtual centerline C. In yet another embodiment, the length L of the display area 104 is preferably decreasing by 0.098% relative to the adjacent display area 104 as it moves away from the virtual centerline C. That is, the length L of the display area 104 may be continuously decreasing as moving away from the virtual center line C. However, the invention is not limited thereto. In other embodiments, the length L of the display area 104 is also Therefore, the proportion is gradually decreased as it goes away from the virtual center line C.

It should be noted that when uniform light is emitted through the display area 104, since the length L of the display area 104 decreases with distance from the virtual center line C, the brightness distribution on the display panel 100 may be away from the virtual center line C. Decrement. That is to say, in a case where the length L of the display area 104 is decremented away from the virtual center line C, the display panel 100 may exhibit a display effect that the brightness of the central area of the display screen is greater than the brightness of the upper and lower sides, and provides User's ideal visual effect.

In addition, the display panel 100 of the present embodiment is, for example, an organic light emitting display panel, and the display area 104 can be regarded as a light emitting area in a pixel. That is to say, the display panel 100 can be a self-luminous display panel, and can be directly used as a display device without being integrated with the backlight module.

2 is a cross-sectional view of a display device in accordance with an embodiment of the present invention.

Referring to FIG. 2 , the display device 20 includes a display panel 200 and a backlight module 210 . The display panel 200 is disposed on the backlight module 210 . In addition, a top view of the display panel 200 is shown in FIG. 1 .

Referring to FIG. 2 and FIG. 1 , the display panel 200 is similar to the display panel 100 . The pixel area 202 and the display area 204 in the display panel 200 are the same as the corresponding pixel area 102 and display area 104 in the display panel 100. This will not be repeated. The display panel 200 is different from the display panel 100 in that the display panel 200 further includes a light shielding pattern layer 206 that shields the display panel 200 from other regions than the display area 204. That is, the length L of the display area 204 of the display panel 200 decreases as it moves away from the virtual center line C, and the shading map corresponding to each pixel area 202 The length W of the layer 206 will increase as it moves away from the virtual centerline C.

It should be noted that when the display panel 200 is combined with a backlight module that can provide a uniform surface light source, since the length L of the display area 204 decreases as it goes away from the virtual center line C, the brightness distribution on the display panel 200 will appear along with Decreasing away from the virtual centerline C, as shown in Figure 3A. That is to say, the amount of light emitted from the central area of the display panel 200 is greater than the amount of light emitted from the upper and lower sides. In this way, by providing the display panel 200, the display device 20 can display a display effect in which the brightness of the central area of the display screen is greater than the brightness of the upper and lower sides, thereby providing a user with a desired visual effect.

In addition, the display panel 200 of the present embodiment is, for example, a liquid crystal display panel, and in order to clearly explain the relationship between the light-shielding pattern layer 206 and the display region 204, other components required for the liquid crystal display panel, such as pixels, are omitted in FIG. Array substrate, display medium, and the like. However, the invention is not limited thereto. In other embodiments, the display panel 200 may be another non-self-luminous display panel such as an electrophoretic display panel, or may be an organic light emitting display panel, an inorganic light emitting display panel, a plasma display panel, a fluorescent display panel, or a phosphorescent display. A self-luminous display panel such as a panel. When the display panel 200 is the above self-luminous display panel, the display device 20 does not need to provide the backlight module 210.

In addition, in FIG. 2, although the display panel 200 includes the eight-line display area 204, the present invention is not limited thereto. In other embodiments, depending on the design of the display device 20 in practice, the display panel 200 can include 1080 lines of display area 204.

The backlight module 210 includes a light box 212, a plurality of light emitting elements 214, and a diffusing plate 216. The light emitting element 214 is disposed in the light box 212. In the present embodiment, the light-emitting element 214 can be any light source known to those of ordinary skill in the art. The light-emitting elements 214 can be point light sources arranged in an array, such as light emitting diodes; or line light sources, such as cold cathode fluorescent tubes.

In FIG. 2, the pitch P2 of the light-emitting elements 214 decreases as moving away from the virtual center line C. Therefore, the light-emitting elements 214 are more densely distributed in the upper and lower sides of the backlight module 210 than the central area of the backlight module 210. As a result, the brightness distribution of the surface light source provided by the backlight module 210 on the display panel 200 increases with distance from the virtual center line C, as shown in FIG. 3B. When the display panel 200 is paired with the backlight module 210, the display device 20 will exhibit a brightness distribution as shown in FIG. 3C. That is to say, the display device 20 can present a display effect in which the brightness of the central area of the display screen is greater than the brightness of the upper and lower sides, thereby providing a user with a more desirable visual effect. In addition, the present invention does not limit the ratio and form of the pitch P2 decrement, and can be adjusted according to the brightness requirement and visual effect of the backlight module 210, as long as the surface light source provided by the backlight module 210 is on the display panel 200. The distribution will increase as it moves away from the virtual centerline C.

The diffuser plate 216 can be any diffuser plate known to those of ordinary skill in the art and disposed between the light emitting element 214 and the display panel 200. Further, although the backlight module 210 can provide the luminance distribution as shown in FIG. 3B by adjusting the pitch P2 of the light-emitting elements 214, the present invention is not limited thereto. In other embodiments, the backlight module 210 can also provide a light pattern or opening through the diffusion plate 216 to achieve a brightness distribution as shown in FIG. 3B. In other embodiments, it is more The light guide plate with or without the light-emitting pattern is disposed in the backlight module 210, and the invention is not limited.

In addition, although the backlight module 210 of the present embodiment is a direct type backlight module, the present invention is not limited thereto. As shown in FIG. 4A, the display device 30 of FIG. 4A is similar to the display device 20 of FIG. 2, and the display panel 300 of the display device 30 is the same as the corresponding display panel 200 of the display device 20, and thus will not be repeated here. The display device 30 is different from the display device 20 in that the backlight module 310 in the display device 30 is a side-lit backlight module, and the backlight module 210 in the display device 20 is a direct-lit backlight module.

The backlight module 310 includes a light box 312, a light guide plate 314, a plurality of light emitting elements 316, and a light exiting pattern 318. The light guide plate 314 is disposed in the light box 312 and located under the display panel 300. The light guide plate 314 has an opposite bottom surface S1 and a light exit surface S2. Light-emitting element 316 can be any light source known to those of ordinary skill in the art. The light-emitting element 316 can be a point source, such as a light-emitting diode, but the invention is not limited thereto. The light-emitting pattern 316 is disposed on the bottom surface S1 of the light guide plate 314. The light exit pattern 318 can be any of the light exit patterns known to those of ordinary skill in the art. The light-emitting pattern 318 is, for example, a dot pattern, a bite pattern, an engraving pattern, an ink pattern, or the like.

The backlight module 310 can also provide a brightness distribution as shown in FIG. 3B such that when integrated with the display panel 300, the display device 30 can exhibit a brightness distribution as shown in FIG. 3C. Hereinafter, the backlight module 310 will be described with reference to FIG. 4B.

4B is a top plan view of the backlight module of FIG. 4A. Please refer to FIG. 4B. The pitch P3 of the light-emitting elements 316 decreases as moving away from the virtual center line C, and the light-emitting patterns 318 have the same size and pitch P4. Therefore, in the backlight module 310, the distribution of the light-emitting elements 316 in the upper and lower sides is denser than that in the central area, and the light-emitting patterns 318 are evenly distributed. As a result, the brightness distribution of the surface light source provided by the backlight module 310 on the display panel 300 is increased as moving away from the virtual center line C.

The display device 30 can exhibit a brightness distribution as shown in FIG. 3C, except that the backlight module 310 is provided with a brightness distribution as shown in FIG. 3B through the design as shown in FIGS. 4A and 4B, thereby integrating with the display panel 300. In addition, the backlight module can also achieve the above purpose through other designs. This will be described below in conjunction with FIGS. 5A and 5B.

5A and 5B are schematic top views of another backlight module, respectively. Referring to FIG. 4B, FIG. 5A and FIG. 5B, the backlight module 310a of FIG. 5A and FIG. 5B is similar to the backlight module 310 of FIG. 4B, and therefore the same components as those of FIG. 4B are denoted by the same symbols, and are not heavy. Overwrite the statement.

Referring to FIG. 5A, the light-emitting element 316a and the light-emitting pattern 318a have the same pitch P3 and pitch P4, respectively, but the size of the light-emitting pattern 318a increases as moving away from the virtual center line C. Therefore, in the backlight module 310a, the light-emitting elements 316a are evenly distributed, and the area in which the light-emitting patterns 318a are distributed increases as moving away from the virtual center line C. As a result, the brightness distribution of the surface light source provided by the backlight module 310a on the display panel 300 is increased as moving away from the virtual center line C. In an embodiment, the size of the light-emitting pattern 318a is between 50 μm and 200 μm, but not limited thereto.

In addition, referring to FIG. 5B, the light-emitting elements 316a have the same pitch P3, The light-emitting patterns 318a have the same size, and the pitch P4 of the light-emitting patterns 318a decreases as moving away from the virtual center line C. Therefore, in the backlight module 310a, the light-emitting elements 316a are evenly distributed, and the area in which the light-emitting patterns 318a are distributed increases as moving away from the virtual center line C. As a result, the brightness distribution of the surface light source provided by the backlight module 310a on the display panel 300 is increased as moving away from the virtual center line C.

Based on the above, by integrating the display panel 300 and the backlight module 310 or the backlight module 310a, the display device 30 can display a display effect in which the brightness of the central area of the display screen is greater than the brightness of the upper and lower sides, thereby providing an ideal user. Visual effects.

In addition, in FIGS. 4B, 5A, and 5B, although the shapes of the light-emitting patterns 318 and 318a are circular, the present invention is not limited thereto. In other embodiments, the shape of the light-emitting pattern may be any geometric pattern or irregular pattern.

In addition, the backlight module 310, 310a may further include an optical film (not shown) disposed above the light emitting surface S2 of the light guide plate 314. The optical film is, for example, a diffuser film, a brightness enhanced film (BEF), a prism sheet, or a combination thereof. In order to enable the display device 30 to achieve a visual effect that is more desirable for the user, a light pattern or aperture may be disposed on the optical film, wherein the light exit pattern may be the light exit pattern 318a as shown in FIGS. 5A and 5B. It is worth mentioning that the light-emitting pattern 318a as shown in FIG. 5A and FIG. 5B can also be disposed on the diffusion plate 216 of the backlight module 210.

Further, in the present embodiment, the backlight modules 310 and 310a guide the light through the light guide plate 314, but the present invention is not limited thereto. In other implementations In the formula, the backlight modules 310, 310a may also include a light guiding cavity, and the light guiding cavity may also be provided with a light pattern.

In addition, the present invention does not limit the configuration of the backlight modules 310, 310a. Although the backlight module 310 mentioned herein has the light-emitting elements 316 whose pitch P3 decreases with the distance from the virtual center line C, and the backlight module 310a. The light-emitting pattern 318 having a distributed area that increases with the distance from the virtual center line C, but other structural designs that provide the same brightness distribution, is still a technical solution that can be employed in the present invention without departing from the scope of the present invention.

In addition, the display devices of the embodiments of FIG. 1, FIG. 2 and FIG. 4 are two-dimensional display devices to provide a two-dimensional image with a user's desired visual effect. However, the invention is not limited thereto. In other embodiments, the display device of the present invention may also be a three-dimensional display device.

6 is a schematic cross-sectional view of a display device in accordance with another embodiment of the present invention. Figure 7 is a top plan view of the phase retarder of Figure 6.

Referring to FIG. 6 and FIG. 2 simultaneously, the display device 40 of FIG. 6 is similar to the display device 20 of FIG. 2, and the display panel 400 and the backlight module 410 of the display device 40 and the corresponding display panel 200 and the backlight module of the display device 20 are similar. The group 210 is the same and therefore will not be described again here, and the display device 40 is different from the display device 20 in that the display device 40 further includes a phase retarder 420 disposed on the display panel 400.

Referring to FIG. 6 and FIG. 7 simultaneously, the phase retarder 420 has a plurality of first phase delay regions RR and a plurality of second phase delay regions RL staggered, wherein the first phase delay region RR and the second phase delay region RL The amount of phase delay is different. Detailed The arrangement in which the first phase delay region RR and the second phase delay region RL are staggered is designed corresponding to the display region 204 in the pixel region 202 of the display panel 400. In the present embodiment, the first phase retardation region RR and the second phase retardation region RL are strip-shaped, and the directions in which the parallel virtual centerlines C extend are staggered with each other. Therefore, each of the first phase retardation region RR and the second phase retardation region RL respectively correspond to each column display region 204 in the display panel 400. In this way, after the image displayed by the display area 204 passes through the first phase delay area RR and the second phase delay area RL having different phase delay amounts, the display device 40 presents the corresponding first phase delay area RR and the second. The right eye picture and the left eye picture of the phase delay zone RL enable the user to see the right eye picture and the left eye picture and superimpose in the brain to form a stereoscopic image.

As described above, since the length L of the display area 204 decreases as it moves away from the virtual centerline C, the brightness distribution on the display panel 400 may appear to decrease as it moves away from the virtual centerline C. Therefore, by integrating the display panel 400 and the backlight module 410, the display device 40 can present a stereoscopic image in which the brightness of the central area of the display screen is greater than the brightness of the upper and lower sides, thereby providing a user with a desired visual effect.

Although the first phase retardation region RR and the second phase retardation region RL of the present embodiment are strip-shaped, the present invention is not limited thereto. In other embodiments, the first phase delay region RR and the second phase delay region RL may also be island-like patterns respectively corresponding to one or more display regions 204. That is to say, the present invention does not limit the shape, size and arrangement of the first phase delay region RR and the second phase delay region RL, and those skilled in the art can design according to actual needs. Correspondence between the first phase delay region RR, the second phase delay region RL, and the display region 204.

Additionally, phase retarder 420 can be any phase retarder known in the art to those of ordinary skill in the art. The phase retarder is located between the user and the display panel, so the pitch of the phase delay regions in the phase retarder is slightly smaller than the pitch of the pixel regions. Taking the display device 40 of FIG. 6 as an example, the height P5 of the first phase retardation region RR and the second phase retardation region RL is smaller than the height P1 of the pixel region 202. Therefore, in the central area of the display device 40, the display area 204 is almost aligned with its corresponding first phase delay area RR or second phase delay area RL, and at the upper and lower sides of the display device 40, the display area 204 does not The corresponding first phase delay region RR or second phase delay region RL is perfectly aligned. In one embodiment, the height P5 of the first phase delay region RR and the second phase delay region RL is 0.14 μm smaller than the height P1 of the pixel region 202.

However, during fabrication or shipping, the phase retarder is susceptible to changes in the environment (eg, temperature and humidity) such that the pitch of the phase delay regions becomes larger or smaller, resulting in each phase retard region compared to its original position. An offset will occur. In the foregoing case, the upper and lower sides of the changed phase retarder may be severely offset from their original positions. Therefore, when viewing the current display device, the user can actually see the superimposed image on the upper and lower sides of the display panel.

In the present embodiment, the length L of the display area 204 is decreased as moving away from the virtual center line C, whereby the user is on the display panel 400 even if the heights of the first phase delay area RR and the second phase delay area RL are changed. Upper and lower areas are also available To see the correct stereo image. In one embodiment, the overall phase retarder 420 has a total dimensional change of ±100 μm. Hereinafter, description will be made with reference to FIGS. 8A and 8B.

Fig. 8A is a partially enlarged schematic view showing a central area of the display device of Fig. 6. Figure 8B is a partially enlarged schematic view of the lower side of the display device of Figure 6. Referring first to FIG. 8A, at the central region of the display device 40, the size of the display region 204 is large, and the display region 204 is almost aligned with its corresponding first phase retardation region RR or second phase retardation region RL. Therefore, when the user V views the display device 40 at a position parallel to the central region of the display device 40, even if the phase retarder 420 is shifted, the user V can still view the correct stereoscopic image.

Next, referring to FIG. 8B, at the lower side of the display device 40, although the display area 204 is not aligned with the corresponding first phase delay area RR or second phase delay area RL, the size of the display area 204 is small. Thereby, interference between the display areas 204 can be avoided. Therefore, when the user V views the display device 40, even if the phase retarder 420 is severely shifted, the user V can still erroneously see the image of the display area 204R and can view the correct stereoscopic image. Further, if the size of the display area 204R and the display area 204L is larger than that shown in FIG. 8B, the right-eye image provided by the display area 204R also becomes a part of the left-eye picture through the second phase delay area RL. That is to say, the image seen by the user V has an overlapping image, and a good stereoscopic image cannot be viewed.

In order to clearly illustrate the relationship between the display panel 400 and the phase retarder 420, the backlight module 410 is omitted from FIGS. 8A and 8B. In addition, although the backlight module 410 is implemented by the backlight module 210 of FIG. 2, it has Generally, the knowledgeable person should understand that the backlight module 410 can also be implemented by the backlight module 310 of FIG. At this time, the display device 40 is a non-self-luminous display device. In addition, although the display device 40 includes the backlight module 410, it should be understood by those of ordinary skill in the art that the display device 40 may not include the backlight module 410, that is, the display device 40 may also be a self-luminous display device. Further, when the display device 40 is a self-luminous display device, the display panel 400 may be implemented by the display panel 100 of FIG. 1 .

In summary, in the display device of the present invention, since the length of the display area decreases as moving away from the virtual center line, the display panel can present that the brightness of the central area of the display screen is greater than the brightness of the upper and lower sides. Display the effect and provide the user with a better visual effect. Further, the display device of the present invention may be a two-dimensional display device or a three-dimensional display device, and in the case where the display device is a three-dimensional display device, the user can see the correct stereoscopic image on both the upper and lower sides of the display device.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧ display panel

102‧‧‧Photo District

104‧‧‧ display area

C‧‧‧Virtual Centerline

D ₁ , D ₂ ‧‧‧ directions

L‧‧‧ length

P1‧‧‧ height

Claims (11)

A display device includes: a display panel having a plurality of pixel regions, each pixel region having a display area, a virtual center line extending through a center point of the display panel and along a first direction, the displays The length of the zone in a second direction perpendicular to the first direction decreases as it moves away from the virtual centerline. The display device of claim 1, wherein the length of the display areas in the second direction decreases by 0.07% to 0.1% with respect to the adjacent display areas away from the virtual center line. . The display device of claim 1, wherein the lengths of the display areas in the second direction are decreasing by 0.076% to 0.098% with respect to the adjacent display areas away from the virtual center line. . The display device of claim 1, wherein the display panel comprises a light shielding pattern layer, the light shielding pattern layer shielding other areas of the display panel except the display areas. The display device of claim 1, further comprising a backlight module, wherein the display panel is a liquid crystal panel, and the display panel is disposed on the backlight module. The display device of claim 5, wherein the backlight module is a side-lit backlight module or a direct-lit backlight module. The display device of claim 5, wherein the brightness distribution of the surface light source provided by the backlight module on the display panel is away from the virtual center The line is incremented. The display device of claim 5, wherein the backlight module has a plurality of light-emitting elements, and the pitch of the light-emitting elements decreases as moving away from the virtual center line. The display device of claim 1, further comprising a phase retarder disposed on the display panel, the phase retarder having a plurality of first phase delay regions and a plurality of second phase delay regions arranged in a staggered manner The first phase delay regions and the second phase delay regions have different phase delay amounts. The display device of claim 9, wherein the first phase retardation regions and the second phase retardation regions are strip-shaped, and the first directions are staggered in parallel with each other. The display device of claim 1, wherein the lengths of the display areas in the second direction are continuously decreasing or phased with respect to the display areas that are relatively adjacent to the virtual center line. Declining ground.