TWI697715B - Display device - Google Patents

Abstract

A display device is configured such that a through-hole extends through a liquid crystal panel and a light guide plate, a fastener for coupling the hands of a watch is coupled to the through-hole, and the formation of a dark region is prevented due to interference between the fastener and light from a light source around the through-hole. At least one flat side surface for minimizing interference with the light from the light source is provided on the fastener, whereby uniform luminance is provided around the through-hole.

Description

monitor

The invention relates to a display. The display is used for making the perforation connecting the rotatable pointer of the watch at the center of the liquid crystal panel.

In recent years, in an information-based society, displays as a visual information transmission medium have become more important. In order to occupy a place in the future, displays need to meet the needs of low power consumption, thinness, lightness and high image quality.

Displays can be classified into self-luminous displays and non-self-luminous displays. Self-luminous displays are, for example, cathode ray tube (CRT) displays, electroluminescence (EL) displays, light-emitting diodes (LED) displays, vacuum fluorescent displays (vacuum fluorescent displays). , VFD) device, field emission display (Field Emission Display, FED) and plasma display panel (PDP). The non-self-luminous display is, for example, a liquid crystal display (LCD).

A liquid crystal display is a device that uses the optical anisotropy of liquid crystals to display images, and has received a lot of attention, because compared to cathode ray tube displays of the same size, liquid crystal displays exhibit higher visibility and cost more Low power and generate less heat.

In a liquid crystal display, a data signal according to image information is respectively supplied to a plurality of pixels arranged in a matrix to adjust the optical transmittance of the pixels to present a better image.

To this end, a liquid crystal display includes a liquid crystal panel arranged in a matrix, a driving element for driving pixels, and a backlight unit that supplies light to the liquid crystal panel.

FIG. 1 is a schematic diagram of the structure of a conventional liquid crystal display, and FIG. 2 is a schematic diagram of the surface brightness of the liquid crystal display in FIG.

Please refer to FIG. 1, a conventional liquid crystal display 1 includes a liquid crystal panel 2 provided with a plurality of pixels arranged in a matrix to output images, a driving unit (not shown) for driving these pixels, and a backlight unit 5. The backlight unit 5 has a light guide plate 3 and a light source 4 arranged behind the liquid crystal panel 2 to emit light toward the entire surface of the liquid crystal panel 2.

The liquid crystal panel 2 generally includes a color filter substrate and an array substrate stacked to face each other and maintain a uniform unit gap, and a liquid crystal layer formed in the unit gap between the color filter substrate and the array substrate. The top polarizing plate and the bottom polarizing plate are installed on the outer surface of the liquid crystal panel 2. The bottom polarizing plate can polarize the light passing through the backlight unit 5, and the top polarizing plate can polarize the light passing through the liquid crystal panel 2.

Displays other than traditional rectangular displays, such as circular displays, are called free-form displays. "Free form" means that the nature, appearance, or shape of an object is different from the traditional nature, appearance, or formation. That is to say, the free-form display has a display that has an outer shape different from that of a traditional rectangular display, such as a circular display or a diamond-shaped display.

The processing of manufacturing free-form displays is very important, because unlike traditional rectangular displays, free-form displays are processed to obtain different shapes. In addition, a stylish and thin frame is needed to satisfy the user's convenience compared with traditional products.

As the use of displays becomes more and more popular, it is necessary to develop a display that is used in the field where the display is applied. For example, it must be considered that at least one perforation 6 with physical buttons or watch hands such as hour hand, minute hand and second hand has an area for the display to present images.

However, as shown in FIG. 2, in this case, the brightness before and after the perforation 6 will have a huge difference. In addition, the part directly exposed to the light from the light source and the part not exposed to the light will produce uneven brightness difference.

In order to solve the above-mentioned problem, the light-emitting diode modules of the backlight unit in FIG. 1 can be arranged on opposite sides thereof. However, in this case, the size of the frame will be increased.

Therefore, the present invention provides a display that substantially avoids the problems caused by the disadvantages and limitations of one or more conventional technologies.

An object of the present invention is to provide a display that has a perforation and can increase the brightness of an area located near the perforation and where light from the light source does not directly reach, so that the brightness of the entire liquid crystal panel is uniform.

Another object of the present invention is to provide a display, the light emitting diode module of the display is only arranged on one side of a liquid crystal panel, so the frame can be reduced compared to the display with the light emitting diode module arranged on the opposite sides of the liquid crystal panel Size and reduce manufacturing costs.

The additional advantages, objectives, and features of the present invention will be described below, and can be understood by those with ordinary knowledge by checking the following description or implementing the present invention. The purpose and other advantages of the present invention can be understood from the following embodiments, the scope of the patent application, and specific parts of the drawings.

In order to achieve these objectives and other advantages and comply with the purpose of the present invention, a specific and general description of a display of the present invention is given here. The display of the present invention includes a fastening unit and a light guide plate. The fastening unit is connected to a hole formed entirely and penetrated through a liquid crystal panel. At least one surface of the perforation is flat, so that light from a light source can reach a dark area near the perforation more effectively.

The shape of the perforation can be modified to minimize interference with light from the light source in the traveling direction of the light, and reduce the brightness difference caused by the fastening unit in the liquid crystal panel, thereby achieving uniform brightness.

The fastener can reflect or transmit light from the light source toward a dark area of the slot, thereby improving the brightness of the dark area.

It can be understood that the above general description and the following detailed description are both exemplary descriptions and used to provide a further description of the patent application scope of the present invention.

Hereinafter, an exemplary embodiment of an organic light emitting display according to the present invention will be described in detail with reference to the drawings, so that those skilled in the art can easily understand the present invention. In the drawings, they are shown in different drawings in time, and the same elements are represented by the same reference numerals. In the following description of the present invention, the conventional functions and structures will be omitted when they obscure the essence of the present invention. Those skilled in the art will realize that certain features in the schema can be exaggerated, reduced, or simplified to facilitate the explanation of the present invention, and the schema and the elements in it are not all drawn with precise dimensions.

Fig. 3 is a front view of a handheld device provided with a display according to the first embodiment of the present invention.

Please refer to FIG. 3, a handheld device 10 is, for example, a wearable watch. Of course, the present invention can be applied to a mobile/portable device or non-portable device. In addition, the present invention can be applied to a vehicle-mount terminal which is a mobile/portable device. The vehicle-mounted terminal can be a speedometer or a dashboard that displays the speed.

The handheld device 10 is provided with a through hole 111 in the center thereof (as shown in FIG. 4). In other words, the perforation 111 is provided at a position where the hands 11 of the watch, such as the hour hand, the minute hand, and the second hand, are connected and rotatably disposed on a liquid crystal panel 110. In addition, a fastening unit 140 (as shown in FIG. 4) is connected to the through hole 111 to guide the connection of the hands 11 of the watch. The fastening unit 140 may include a body and a head that are at least partially transparent.

In addition, a holding member 12 is, for example, a band or a chain so that the handheld device 10 can be worn on the user's wrist.

4 is an exploded view of the display in FIG. 3, and FIG. 5 is a schematic diagram of the display in FIG. 4 when it is in a driven state.

4 and 5, a display 100 according to a first embodiment of the present invention includes a liquid crystal panel 110, a backlight unit 120, a housing 130 for accommodating the liquid crystal panel 110 and the backlight unit 120, and connected to A fastening unit 140 of a through hole 111. The through hole 111 penetrates the liquid crystal panel 110 and a light guide plate 121. The perforation in the liquid crystal panel 110 can be represented as a first perforation, and the perforation in the light guide plate 121 can be represented as a second perforation. The second perforation is aligned with the first perforation.

The pixels in the liquid crystal panel 110 are arranged in a matrix to output an image, and the liquid crystal panel 110 includes a color filter substrate 112, an array substrate 113 and a liquid crystal layer (not shown). The color filter substrate 112 and the array substrate 113 are stacked on each other to face each other, so that a uniform unit gap is maintained between the color filter substrate 112 and the array substrate 113. The liquid crystal layer is formed in the unit gap between the color filter substrate 112 and the array substrate 113.

The backlight unit 120 includes a light guide plate 121, a light emitting diode module, and a reflective plate 123. The light guide plate 121 is disposed under the liquid crystal panel 110. The light emitting diode module has a plurality of light sources 126 arranged on one side of the light guide plate 121 to emit light. The reflective plate 123 is located on the back of the light guide plate 121. The light emitting diode module of the backlight unit 120 is disposed on one side of the casing 130.

A plurality of optical sheets 124 for improving the emission efficiency of light emitted from the light guide plate 121 to the liquid crystal panel 110 are located on the upper surface of the light guide plate 121. However, the present invention is not limited to this. Any kind of backlight unit 120 can be applied to the display 100 according to the present invention.

The light guide plate 121 guides the light emitted from the light source 126 to the liquid crystal panel 110. The light guide plate 121 may be made of plastic such as polymethylmethacrylate (PMMA) or polycarbonate (PC).

The reflective plate 123 is interposed between the housing 130 and the back surface of the light guide plate 121. The reflective plate 123 reflects the light emitted from the light source 126 and the light reflected by the light guide plate 121 toward the liquid crystal panel 110. The light emitted from the light source 126 is incident on the side surface of the light guide plate 121 made of a transparent material. The reflective plate 123 disposed on the back of the light guide plate 121 reflects the light transmitted to the back of the light guide plate 121 toward the optical sheet 124 disposed on the top surface of the light guide plate 121, thereby reducing the loss of light and improving the uniformity of brightness.

The optical sheet 124 may include a diffusion sheet 1241 and a prism sheet 1242, and may further include a brightness improvement film 1243 and a protective sheet (not shown). The brightness optimization film 1243 is, for example, a double brightness enhancement film (DBEF). The optical sheet 124 may be interposed between the top surface of the light guide plate 121 and the back surface of the liquid crystal panel 110. The backlight unit 120 having the above structure is accommodated in the housing 130.

The housing 130 may include a side portion 131 extending in the vertical direction from the bottom. The side portion 131 extends vertically from the edge of the casing 130 to have a predetermined height. The housing 130 may include multiple sides.

The through hole 111 penetrates through the center of the liquid crystal panel 110, the optical sheet 124, the light guide plate 121, the reflective plate 123 and the housing 130. The fastening unit 140 is connected to the through hole 111. The through hole 111 penetrates at least the liquid crystal panel 110 and the light guide plate 121.

When the fastening unit 140 is connected to the through hole 111, the connection position of the liquid crystal panel 110, the optical sheet 124, the light guide plate 121 and the reflection plate 123 or the housing 130 will be fixed. When at least one surface of the fastening unit 140 is flat, the brightness near the perforation 111 will become uniform. At least one flat surface of the fastening unit 140 may be located on a body of the fastening unit 140. A section of the body of the fastening unit 140 may be smaller than the second perforation, and a section of the head may be larger than the second perforation. The body of the fastening unit 140 can be inserted into the second through hole.

Please refer to FIG. 5, a light emitting diode module 125 with a plurality of light sources 126 is disposed on one side of the light guide plate 121. The light source 126 is only arranged on one side of the light guide plate 121. Therefore, the size of a frame (not shown) can be reduced compared with the case where the light emitting diode module 125 is disposed on the opposite sides of the light guide plate 121.

The light source 126 diverges light from one side of the light guide plate 121 toward the other side of the light guide plate 121. The light emitting diode module 125 includes a first light source 1261 arranged on the left side of the through hole 111, a second light source 1262 arranged on the right side of the through hole 111, and a third light source 1263 arranged on the left side of the first light source 1261 and A fourth light source 1264 on the right side of the light source 1262.

The first light source 1261 and the second light source 1262 diverge light toward a single reference point located in the middle of the other side of the light guide plate 121. The light emitted from the third light source 1263 is parallel to the light emitted from the first light source 1261, and the light emitted from the fourth light source 1264 is parallel to the light emitted from the second light source 1262. Therefore, the light exit surfaces 127 of the first light source 1261 and the third light source 1263 are arranged at the same angle, and the light exit surfaces 127 of the second light source 1262 and the fourth light source 1264 are arranged at the same angle. Therefore, the first light source 1261 to the fourth light source 1264 can diverge light uniformly from one side of the light guide plate 121, thereby resulting in a uniform brightness distribution. Therefore, the image quality can become uniform without deviation.

In the example of FIG. 5, the shape of one side of the light guide plate 121 is curved, and the first light source 1261 to the fourth light source 1264 are arranged along the curvature of the light guide plate 121. Alternatively, the light emitting diode module 125 and the light guide plate 121 may be flat, and the light emitting surface 127 may be arranged at the same angle, that is, parallel to each other. In this way, although not shown in the drawings, the effect of making the brightness uniform can be achieved by improving the shape of the fastening unit 140, which may be substantially the same in the following description.

In another example, the shape of one side of the light guide plate 121 may be curved, and the first light source 1261 to the fourth light source 1264 may be arranged along a curvature different from the curvature of the light guide plate 121. In this case, an additional structure (not shown) that is the same or similar to the light guide plate 121 can be additionally provided to compensate for the curvature of the light guide plate 121 and the curvature of the light source 126.

6 and 7 are schematic diagrams of the fastening unit in FIG. 5, and FIG. 8 is a schematic diagram of the brightness of the display in FIG. 5.

Referring to FIG. 6, the fastening unit 140 of the display according to the first embodiment of the present invention is approximately formed in the shape of a hollow cylinder, and the fastening unit 140 is inserted into the through hole 111 to be connected to the through hole 111. An opening FH to which the pointer 11 of the watch (as shown in FIG. 3) is connected is formed in the fastening unit 140. The opening FH may be a longitudinal opening passing through the fastening unit 140. Like the light guide plate 121, the fastening unit 140 can be made of a transparent material to reduce interference with light near the perforation 111. The fastening unit 140 may also be made of a part of transparent material.

The fastening unit 140 has at least one flat surface (for example, a flat side surface) facing the other side of the light guide plate 121. The flat surface may be formed on a body of the fastening unit 140. The flat surface is formed by cutting a part of the thickness of the fastening unit 140. The flat surface may be formed by removing a portion of the thickness of the fastening unit 140. The light from the light source 126 is reflected or penetrates the cut or removed part, thereby increasing the brightness near the perforation 111. An air gap may be maintained between an inner surface of the second through hole and at least one flat side surface of the fastening unit 140.

The fastening unit 140 includes a first flat surface 141 (such as a first flat side surface) and a second flat surface 142 (such as a second flat side surface) adjacent to each other. The first flat surface 141 and the second flat surface 142 reduce the thickness (for example, cross-sectional area or volume) of the fastening unit 140 while maintaining the shape of the fastening unit 140. When the first flat surface 141 and the second flat surface 142 are located in the fastening unit 140, a space 122 or air gap is formed between the fastening unit 140 and the through hole 111. When the space 122 is formed, there may be a difference in density between the fastening unit 140 and the light guide plate 121 depending on the material, or a light spark phenomenon may occur according to the angle difference between the fastening unit 140 and the light guide plate 121 ), thereby enhancing the brightness near the perforation 111.

As shown in FIG. 7, at least one reflector (for example, the reflective element 1411) is disposed on the first flat surface 141 and the second flat surface 142. The reflective element 1411 and the fastening unit 140 can be made of the same material, and can be integrally formed with the fastening unit 140. In addition, the reflective element 1411 can be made of a material with high reflectivity, and can be connected to the fastening unit 140. The reflective element 1411 also reflects the light near the perforation 111 to improve the brightness of the area near the perforation 111. The reflective elements 1411 may be arranged in different patterns, or a relatively large number of reflective elements 1411 may be located at the junction of the first flat surface 141 and the second flat surface 142.

The reflective element 1411 may be approximately formed in a hemispherical shape. The reflective element 1411 may have a curved cross-section on a plane parallel to the top side of the light guide plate 121. A flat, concave or convex reflecting plane may be formed on a surface of the reflecting element 1411 to reflect the light from the light source 126 toward the liquid crystal panel 110. In addition, a reflection aspect (not shown) such as a mirror may be located on the reflection plane of the reflection element 1411 to optimize the reflection of light.

Therefore, as shown in FIG. 8, the size of a dark area of the perforation 111 is greatly reduced, and the brightness is increased at approximately three o'clock to five o'clock positions and seven o'clock to nine o'clock positions. Therefore, the display according to the present invention exhibits a more uniform brightness compared to a conventional display that is particularly bright from about two o'clock to ten o'clock.

9 and 10 are schematic cross-sectional views of another embodiment of the fastener of the display in FIG. 5.

Please refer to FIG. 9 first. The fastening unit includes a first flat surface 141, a second flat surface 142, and a third flat surface 143 at a position where the first flat surface 141 and the second flat surface 142 are adjacent to each other. The third flat surface 143 connects the first flat surface 141 and the second flat surface 142.

When the first flat surface 141 to the third flat surface 143 are provided, as described above, the thickness (for example, cross-sectional area or volume) of a through hole 1111 adjacent to the top of the through hole 111 (that is, the other side of the light guide plate) will be reduced Therefore, the interference between the fastening unit and the light from the light source in the direction of the light travel is further reduced. Therefore, the size of a dark area will be reduced, thereby further increasing the uniformity of brightness.

If the thickness of the top of the fastening unit 140 is reduced too much, the connection position of the fastening unit 140 in the through hole 1111 may not be properly fixed. The shape of the through hole 1111 corresponds to the shape of at least one of the first flat surface 141 to the third flat surface 143 of the fastening unit 140. In other words, the through hole 1111 is a hole with a part of a flat surface in it, rather than a simple cylindrical hole, so that the connection position of the fastening unit 140 in the through hole 1111 is fixed. The second through hole in the light guide plate may have at least one flat side surface that matches with at least one flat side surface of the body of the fastening unit 140. Of course, when the shape of the perforation 1111 and the shape of the outer ring surface of the fastening unit 140 are the same, as shown in FIG. 9, the brightness can be improved by changing the shape of the fastening unit 140 and the fastening unit 140 can be fixed in the perforation 1111. .

Referring to FIG. 10, the fastening unit includes a first flat surface 141, a second flat surface 142, and a curved surface located where the first flat surface 141 and the second flat surface 142 are adjacent to each other. The curved surface connects the first flat surface 141 and the second flat surface 142. Compared with the fastening unit 140 in FIG. 9, the fastening unit 140 in FIG. 10 is lowered by more thickness at the top to fundamentally understand the function of the fastening unit 140. In addition, the outer ring surface of the top of the fastening unit 140 and the inner ring surface of a through hole 1112 have a curved shape, thereby reducing the interference between the fastening unit and the light from the light source in the light traveling direction. Therefore, the brightness can be further improved.

In the above-mentioned display according to the present invention, the interference between the fastening unit connected to the perforation and the light from the light source in the light traveling direction is reduced, and the size of a dark area near the perforation is reduced. In addition, by improving the structure of the light sources arranged with the backlight unit 120, the brightness on the liquid crystal panel 110 can be evenly distributed. Furthermore, the light-emitting diode module is only arranged on one side of the liquid crystal panel 110 and is located under the liquid crystal panel 110, and the size of the frame can be further reduced compared to the case where the light-emitting diode module is arranged on opposite sides of the liquid crystal panel. And optimize the image quality.

11 is a schematic cross-sectional view of a fastening unit of the handheld device provided with a display according to the second embodiment of the present invention, FIG. 12 is a schematic view of an optical path in the fastening unit of the display in FIG. 11, and FIG. 13 is A schematic diagram of a modified aspect of a light incident element of the fastening unit in FIG. 12.

Referring to FIGS. 11 to 13, a fastener (such as the fastening unit 240) of the display 200 according to the second embodiment of the present invention has approximately a hollow cylindrical shape, and is inserted into a through hole 111 to be connected to the through hole 111. An opening FH is formed in the fastening unit 240 to understand an additional function. The opening FH may be a longitudinal opening passing through the fastening unit 240. The opening FH can be used to connect multiple hands of a watch, a camera module, a flash module or a sensor to the through hole 111, and the sensor is for example a proximity sensor or a brightness sensor. Illuminance sensor. The fastening unit 240 may include a body and a head that are at least partially transparent.

The fastening unit 240 includes a light incident element 241 for guiding light from a light source into the through hole 111, a reflecting element 242 for reflecting the light guided by the light incident element 241 toward a dark area, and a self-reflecting element 242 A light emitting element 243 that emits light toward the dark area. The fastening unit 240 includes a light incident side IS and a light exit side ES. Part of the light is incident on the light incident side IS, and part of the light is emitted from the light exit side ES. Compared with other surfaces of the body of the fastening unit 240, the light incident side IS and the light exit side ES are closer to an inner surface of the through hole 111 (for example, the second through hole). The fastening unit 240 may have a circular portion, a first convex portion with a light incident side on one side of the main body, and a second convex portion on a light emitting side opposite to the fastening unit 240.

The light incident element 241 is disposed on the through hole 111 to face the light source. As described above, the fastening unit 240 and the light guide plate 121 are made of the same or similar materials, so that light can be effectively transmitted or reflected. Like the light guide plate 121, the fastening unit 240 may be made of a transparent material. The fastening unit 240 may be made of a part of transparent material. Therefore, the light incident element 241 has a function of transmitting the light emitted from the light source to the reflecting element 242.

In addition, as shown in FIG. 13, the angle of the portion of a light incident element 2411 that contacts the through hole 111 can be increased, so that more light can be guided through the light incident element 2411. Of course, the angle of the part of the light emitting element 243 that contacts the through hole 111 can be increased so that more light can be emitted toward the dark area.

The light incident element 241 or 2411 and the light output element 243 may be connected to the inner ring surface of the through hole 111 to be in contact therewith. Therefore, the light guide plate 121 and the fastening unit 240 are in contact with each other, thereby reducing the absorption and reflection of light there.

A part of the reflective element 242 has a circular shape to match the shape of the through hole 111. The outer ring surface of the reflective element 242 is separated from the inner ring side surface of the through hole 111 by a predetermined distance. As shown in FIG. 12, therefore, the light guided into the light incident element 241 is continuously reflected along the reflective element 242 and transmitted through the light emitting element 243 toward the dark area.

In addition, the shape of the reflective element 242 may be different from the shape of the through hole 111. For example, the outer shape of the through hole 111 may be circular, and the outer shape of a part of the reflective element 242 may be quadrangular, oval or polygonal.

Fig. 14 is a schematic diagram of the fastening unit in Fig. 12 when only half of the reflective elements are provided.

Please refer to FIG. 14, a reflective element 2421 is located only on one side of the through hole 111. In the previous embodiment, the reflective element 242 is connected to the light incident element 241 and the light output element 243 on both sides of the through hole 111. However, in this embodiment, light can be transmitted to a dark area through the reflective element 2421, and the size of the reflective element 2421 is half the size of the reflective element 242, thereby optimizing the image quality. The fastening unit 240 of this embodiment has a semicircular portion, a first convex portion with a light incident side on one side of the main body, and a second convex portion with a light emitting side on an opposite side of the main body.

In this way, the size of the element inserted into the through hole 111 together with the fastening unit 240, such as a camera module, is large, and the half-size reflective element 2421 can be used without increasing the size of the through hole 111. In addition, a half-size reflective element 2421 that reflects and transmits less light is used in a relatively low contrast area in a dark area.

FIG. 15 is a schematic diagram of an embodiment in which the fastener (such as a fastening unit) in FIG. 12 includes a plurality of light emitting elements. The body of the fastening unit 240 may include another light-emitting side ES2 adjacent to the light-emitting side ES1, and the light-emitting side ES1 is closer to the light-emitting side ES2 than the light incident side IS.

A light emitting element 2431 emits light reflected by the reflective element 242 toward a dark area to optimize the image quality of the dark area.

The light emitting elements 2431 and 2432 may be located on the reflective element 242 according to the position of the dark area. Of course, a plurality of light incident elements 241 may be located on the reflective element 242 according to the position or direction of a light source.

When the light emitting elements 2431 and 2432 are provided, as described above, a single fastening unit 240 can cover a wider dark area. Therefore, no additional light source is required, and a thinner display can be manufactured.

In the above-mentioned display according to the present invention, the fastening unit connected in the perforation reflects the light from the light source and transmits the reflected light to a dark area. Therefore, the quality of the image near the perforation can be increased without considering the direction of the light source according to the size and position of the dark area to transmit light.

It is obvious from the above description that the display according to the present invention has the following effects.

First, the interference between the fastening unit connected to the perforation in the liquid crystal panel and the light guide plate and the light from the light source in the light traveling direction is reduced, thereby reducing the size of the dark area near the perforation.

Second, the brightness of the liquid crystal panel can be evenly distributed by improving the structure of the light source arranged with the backlight unit.

Third, the light emitting diode module is only arranged on one side of the liquid crystal panel and located under the liquid crystal panel. Compared with arranging the light emitting diode module on opposite sides of the liquid crystal panel, the size of the frame can be further reduced. And optimize the image quality.

Fourth, the fastening unit reflects light from the light source therein and directly reflected light to the dark area, so that the fastening unit can transmit light without considering the size and location of the dark area.

Anyone who is familiar with similar art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the patent protection scope of the present invention covers the above-mentioned changes and modifications and their equivalent changes.

1‧‧‧Traditional liquid crystal display 2‧‧‧LCD panel 3‧‧‧Light guide plate 4‧‧‧Light source 5‧‧‧Backlight unit 6‧‧‧Perforation 10‧‧‧Handheld device 11‧‧‧Pointer 12‧‧ ‧Grip 100,200‧‧‧Display 110‧‧‧Liquid crystal panel 111‧‧‧Perforated 112‧‧‧Color filter substrate 113‧‧‧Array substrate 120‧‧‧Backlight unit 121‧‧‧Light guide plate 122‧‧ ‧Space 123‧‧‧Reflective plate 124‧‧‧Optical sheet 125‧‧‧Light-emitting diode module 126‧‧‧Light source 127‧‧‧Light emitting surface 130‧‧‧Shell 131‧‧‧Side 140, 240 ‧‧‧Fastening unit 141‧‧‧First flat surface 142‧‧‧Second flat surface 143‧‧‧Third flat surface 241,2411‧‧‧Light incident element 242,2421‧‧‧Reflecting element 243,2431 ,2432‧‧‧Light emitting element 1111‧‧‧Perforation 1112‧‧‧Perforation 1241‧‧‧Diffraction film 1242‧‧‧Brightness optimization film 1261‧‧‧First light source 1262‧‧‧Second Light source 1263‧‧‧Third light source 1264‧‧‧Fourth light source 1411‧‧‧Reflective element FH‧‧‧Open hole IS‧‧‧Light incident side ES, ES1, ES2‧‧‧Light emitting side

The related drawings are used to provide a further description of the present invention, and constitute a part of the present invention. In addition, the related drawings are also used to explain the various embodiments of the present invention and the principle of the present invention. In the drawings: FIG. 1 is a schematic diagram of the structure of a conventional liquid crystal display. FIG. 2 is a schematic diagram of brightness when the display of FIG. 1 is driven. Fig. 3 is a front view of a handheld device provided with a display according to the first embodiment of the present invention. Fig. 4 is an exploded view of the display in Fig. 3. FIG. 5 is a schematic diagram of the display in FIG. 4 when it is in a driven state. 6 and 7 are schematic diagrams of the fastening unit in FIG. 5. FIG. 8 is a schematic diagram of the brightness of the display in FIG. 5. 9 and 10 are schematic cross-sectional views of another embodiment of the fastener of the display in FIG. 5. 11 is a schematic cross-sectional view of a fastening unit of a handheld device provided with a display according to a second embodiment of the invention. Fig. 12 is a schematic diagram of an optical path in the fastening unit of the display in Fig. 11. FIG. 13 is a schematic diagram of a modified aspect of a light incident element of the fastening unit in FIG. 12. Fig. 14 is a schematic diagram of the fastening unit in Fig. 12 when only half of the reflective elements are provided. 15 is a schematic diagram of an embodiment in which the fastening unit in FIG. 12 includes a plurality of light emitting elements.

110‧‧‧LCD Panel

111‧‧‧Perforation

121‧‧‧Light guide plate

125‧‧‧Light Emitting Diode Module

126‧‧‧Light source

127‧‧‧Light emitting surface

140‧‧‧fastening unit

1261‧‧‧First light source

1262‧‧‧Second light source

1263‧‧‧Third light source

1264‧‧‧Fourth light source

Claims (11)

A display includes: a liquid crystal panel; a backlight unit, including a light guide plate and a light emitting diode module, the light guide plate is arranged under the liquid crystal panel, the light emitting diode module has a plurality of side by side and along the Light sources arranged on a first side of the light guide plate, the light sources used to diverge light toward a second side of the light guide plate; a housing for accommodating the liquid crystal panel and the backlight unit; and a fastening unit connected to In a hole passing through the liquid crystal panel and the light guide plate; wherein at least one surface of the fastening unit is flat, the at least one surface faces the second side of the light guide plate, and the fastening unit and the through hole There is a space or an air gap formed therebetween so that the fastening unit will not interfere with the light emitted by the light sources in the traveling direction of the light. The display according to claim 1, wherein the light source includes a first light source for emitting light from a left side of the perforation and a second light source for emitting light from a right side of the perforation, and the fastening The unit includes a first flat surface that prevents the fastening unit from interfering with the light emitted from the first light source in the traveling direction of the light, and prevents the fastening unit from interfering with the light emitted from the second light source. A second flat surface where light rays interfere in the traveling direction of the light rays. According to the second light source of the application, the light source further includes a third light source arranged on a left side of the first light source and a fourth light source arranged on a right side of the second light source, the first light source The light-emitting surface of the light source and the third light source are at the same angle And the light emitting surfaces of the second light source and the fourth light source are set at the same angle. In the display described in item 3 of the scope of patent application, the light-emitting surfaces of the first light source and the second light source face the same reference point. The display according to item 3 of the scope of patent application, wherein one side of the light guide plate is curved, and the first light source, the second light source, the third light source, and the fourth light source correspond to the curved shape of the light guide plate Of that side. According to the display described in claim 2, wherein the fastening unit further includes at least one reflective element protruding from the first flat surface or the second flat surface. According to the display described in item 2 of the scope of patent application, the fastening unit further includes a third flat surface located at a portion adjacent to the first flat surface and the second flat surface. In the display described in item 7 of the scope of patent application, a space is formed between the first flat surface and the second flat surface and the perforation. The display according to item 7 of the scope of patent application, wherein the shape of the perforation corresponds to at least one of the first flat surface to the third flat surface. In the display described in item 1 of the scope of patent application, the fastening unit is made of a transparent material. The display according to item 5 of the scope of patent application, wherein the shape of a cross section of the liquid crystal panel is circular, and the shape of the light guide plate is circular to correspond to the shape of the liquid crystal panel, and is used to accommodate the liquid crystal panel And the outer shape of the housing of the light guide plate is also circular so that the perforation is arranged in the center of the liquid crystal panel and the light guide plate, and the first light source, the second light source, the third light source and the fourth light source are side by side The ground is only set on one side of the light guide plate.

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