WO2016145670A1

WO2016145670A1 - Smart watch and liquid crystal screen

Info

Publication number: WO2016145670A1
Application number: PCT/CN2015/075184
Authority: WO
Inventors: 张彦学
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2015-03-17
Filing date: 2015-03-27
Publication date: 2016-09-22
Also published as: CN104698828A; CN104698828B

Abstract

A smart watch (10) and a liquid crystal screen (5). The smart watch (10) comprises a watchband (2) and a watch head (3). The watch head (3) comprises a housing (31) having a locating groove (32). The liquid crystal screen (5) is installed within the locating groove (32) and comprises a backlight module (51) and a liquid crystal panel (52). The backlight module (51) comprises a circuit board (511), a light guide component (512) and a brightness enhancement film group (513). A plurality of light-emitting elements (511a) are arranged on an upper surface of the circuit board (511), and the light guide component (512) is provided thereon with a plurality of grooves (512c) capable of receiving the various light-emitting elements (511a) respectively. The light-emitting elements (511a) of the liquid crystal screen (5) of the smart watch (10) can decrease the thickness of the liquid crystal screen (5), thereby ensuring a smaller thickness of the smart watch (10).

Description

Smart watch and LCD screen

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. CN20151011825, filed on Jan. 17, 2015, which is hereby incorporated by reference.

Technical field

The present invention relates to a liquid crystal panel and a smart watch using the same, which of course can be applied to other electronic products.

Background technique

With the advancement of technology, the development of smart watches has been promoted, making smart watches popular with people. At the same time, people's light and thin requirements for smart watches have also increased. In order to meet market demand, manufacturers of smart watches are looking for ways to reduce the thickness of smart watches. Since one of the main factors determining the thickness of a smart watch is the thickness of the liquid crystal panel mounted, most manufacturers are trying their best to reduce the thickness of the LCD screen.

The existing liquid crystal panel includes a light-emitting element, a light guide plate, and a brightness enhancement film group which are sequentially stacked. According to the positional relationship of the light-emitting elements relative to the light guide plate, the liquid crystal screen can be divided into two types: a lower-mounted liquid crystal screen and a side-mounted liquid crystal screen. Although the thickness of the side-mounted liquid crystal panel is thinner than that of the lower-mounted liquid crystal panel, the watch using the side-mounted liquid crystal panel can cause the side frame to be widened, which affects the aesthetic appearance of the smart watch. Therefore, in order to avoid the influence of the appearance, the manufacturer has widely adopted the underlying type. LCD screen.

The light-emitting element of the lower-mounted liquid crystal panel is fixedly mounted on the surface of the circuit board and located between the light guide plate and the circuit board. Since the light-emitting element itself has a certain height, the light-emitting element can increase the thickness of the liquid crystal screen, thereby indirectly. Increase the thickness of the smart watch.

Therefore, there is a need for a smart watch in which the light-emitting elements of the under-mounted liquid crystal panel can increase the thickness of the liquid crystal screen, thereby facilitating the thinner thickness of the smart watch.

Summary of the invention

In order to solve the above problems, an object of the present invention is to provide a smart watch whose light-emitting element of the under-type liquid crystal panel can increase the thickness of the liquid crystal screen, thereby facilitating the thinner thickness of the smart watch.

According to a first aspect of the invention, there is provided a smart watch comprising a watch strap and a watch head. The meter head includes a housing that is coupled to the strap and has a positioning slot. A liquid crystal panel is installed in the positioning slot, and the liquid crystal panel includes a backlight module and a liquid crystal panel which are arranged in order from bottom to top. The backlight module includes a circuit board, a light guiding member, and a brightness enhancement film group which are sequentially arranged from bottom to top. Wherein, the upper surface of the circuit board is provided with a plurality of light-emitting elements, and the surface of the light-guiding member that is in contact with the upper surface of the circuit board is provided with a plurality of grooves capable of respectively accommodating the respective light-emitting elements.

In one embodiment, the light-emitting elements are LEDs and the grooves are in the shape of a truncated cone or a quadrangular prism.

In one embodiment, the four slopes of the quadrangular truncated recess are opposite the four sides of the cube-shaped LED, respectively.

In one embodiment, a reflective film is also provided on the upper surface of the circuit board.

In one embodiment, the light guiding member includes a plate portion disposed between the brightness enhancing film group and the circuit board and a socket portion formed at an outer edge of the plate portion. Wherein, the socket portion above the plate portion can accommodate the brightness enhancement film group and the liquid crystal panel, and the socket portion under the plate portion can accommodate the circuit board.

In one embodiment, the socket is configured to be opaque.

According to a second aspect of the present invention, a liquid crystal panel including a backlight module and a liquid crystal panel that are attached to each other is provided. The backlight module includes a circuit board, a light guiding member and a brightness enhancement film group which are sequentially arranged toward the liquid crystal panel. The upper surface of the circuit board is provided with a plurality of light-emitting elements, and the surface of the light-guiding member that is in contact with the upper surface of the circuit board is provided with a plurality of grooves that can respectively accommodate the respective light-emitting elements.

The smart watch according to the present invention can embed the light-emitting elements on the circuit board in the recesses of the light-guiding member, so that the upper surface of the circuit board can be attached to the light-guiding member, thereby preventing the light-emitting element from increasing the liquid crystal screen. The thickness of the smart watch thus contributes to the thinner thickness of the smart watch. Compared with the existing light guide plate, the light guiding member of the smart watch of the present invention is more advantageous for reducing energy loss of the light source during the propagation process and improving the degree of divergence of the light guide member.

In addition, the smart watch according to the present invention has a simple structure, low cost, and high production efficiency.

DRAWINGS

The invention will be described in more detail hereinafter based on the embodiments and with reference to the accompanying drawings. among them:

Figure 1 shows a smart watch in accordance with the present invention;

Figure 2 shows a liquid crystal panel of a smart watch according to the present invention;

Figure 3 is a partial enlarged view of a portion A of Figure 2;

Figure 4 shows a light guiding member of a smart watch in accordance with the present invention.

The same components are denoted by the same reference numerals in the drawings. The drawings are not drawn to scale.

detailed description

The invention will now be further described with reference to the accompanying drawings.

The smart watch can be classified into many types, and the smart watch of the present invention can be any type of smart watch. Fig. 1 shows a smart watch 10 having a liquid crystal panel according to the present invention, and also shows a liquid crystal panel 5 according to the present invention.

As shown in FIGS. 1 and 2, the smart watch 10 includes a watch band 2 and a watch head 3 connected to the watch band 2. The head 3 includes a housing 31 having a positioning groove 32, and a liquid crystal panel 5 mounted in the positioning groove 32. The liquid crystal panel 5 includes a backlight module 51 and a liquid crystal panel 52 which are sequentially arranged from bottom to top (in the present application, the direction away from the groove bottom of the positioning groove 32 is defined as the upper side, and the direction near the groove bottom is defined as the lower side). A cover glass 6 capable of covering the liquid crystal panel 5 is provided on the casing 31. The fixing manner between the protective glass 6 and the casing 31 may be a snapping, screwing or gluing. The cover glass 6 may be embedded in the upper surface of the casing 31, and the upper surface of the cover glass 6 is flush with the upper surface of the casing 31. Thus, the upper portion of the watch head 3 can have a smooth upper surface to prevent the wearer from hooking other items while wearing the watch.

In one embodiment, the liquid crystal panel 52 is selected as a liquid crystal panel of a thin film transistor liquid crystal display (TFT LCD for short). That is, the liquid crystal panel 52 includes a polarizing film, a color filter substrate, a liquid crystal layer, an array substrate, and a polarizing plate which are sequentially stacked, and a driving circuit and a printed circuit board. The driving circuit is connected to the array substrate through a printed circuit board. The liquid crystal panel of the thin film transistor liquid crystal display is well known to those skilled in the art and will not be described in detail herein.

In one embodiment, the backlight module 51 includes a circuit board 511, a light guiding member 512, and a brightness enhancement film group 513 arranged in order from bottom to top. The upper surface of the circuit board 511 is provided with a plurality of light-emitting elements 511a. The surface of the light-guiding member 512 that is in contact with the upper surface of the circuit board 511 is provided with a plurality of recesses 512c capable of respectively accommodating the respective light-emitting elements 511a (see FIG. 3). ). After the light-emitting element 511a emits light, it can be applied under the action of the light guiding member 512. The original line light is converted into a surface light and then passed through the brightness enhancement film group 513 to enter the liquid crystal panel 52 to provide a desired light source for the display of the liquid crystal panel 52. All of the light-emitting elements 511a of the smart watch 10 according to the present invention can be embedded in the corresponding recesses 512c, causing the upper surface of the circuit board 511 to closely fit the light guiding member 512, so that the light-emitting elements 511a do not increase the liquid crystal panel 5. The thickness is to ensure that the smart watch 10 has a thinner thickness. Compared with the existing light guide plate, the light guiding member 512 of the present invention is more advantageous for reducing the energy loss of the light source during the propagation process and improving the degree of divergence of the light guiding member 512. In addition, the light guiding member 512 can directly transmit the force to the circuit board 511 after receiving the external pressure, so as to prevent the top end of the light emitting element 511a from breaking the light guiding member 512.

In a preferred embodiment, the brightness enhancement film set 513 includes a diffusion film, a brightness enhancement film, and a diffusion film that are sequentially disposed from bottom to top. By the brightness enhancement film group 513, the light transmittance of the upper surface of the backlight module 51 can be improved, and the brightness of the liquid crystal panel 52 when the screen is displayed can be improved. In addition, those skilled in the art can also select other forms of brightness enhancement film set 513 to increase the brightness of the liquid crystal panel 52 when displaying a picture. The diffusion film and the brightness enhancement film are well known to those skilled in the art, and are not described herein again.

In one embodiment, the light-emitting element 511a is selected as an LED (Light Emitting Diode), and the recess 512c is configured in a truncated cone shape or a quadrangular prism shape. These two shaped grooves 512c facilitate manufacturing and reduce production costs. The truncated or quadrangular truncated recess 512c can effectively accommodate the LEDs, causing the upper surface of the circuit board 511 to conform to the light guiding member 512.

In a preferred embodiment, the four bevels of the quadrangular truncated recess 512c are disposed opposite the four sides of the cube-shaped LED, respectively. Through a large number of experiments, when the four sides of the LED are opposite to the four inclined faces of the quadrangular trough-shaped recess 512c, the light emitted by the cubic LED can smoothly enter the light guiding member 512, thereby reducing the loss of the ability of the propagation process and improving The brightness of the liquid crystal panel 52.

In one embodiment, the light guiding member 512 includes a plate portion 512a disposed between the brightness enhancing film group 513 and the circuit board 511 and a socket portion 512b formed at an outer edge of the plate portion 512a. The socket portion 512b above the plate portion 512a can accommodate the brightness enhancement film group 513 and the liquid crystal panel 52, and the socket portion 512b under the plate portion 512a can accommodate the circuit board 511. In this way, the liquid crystal panel 5 can position the brightness enhancement film group 513, the liquid crystal panel 52, and the circuit board 511 through the socket portion 512b of the light guiding member 512, so that the liquid crystal panel 5 can constitute an independent individual, thereby facilitating prefabrication in advance. Conducive to improve production efficiency.

In order to increase the brightness, a reflective film is further provided on the upper surface of the circuit board 511. That is, the reflective film does not cover the light-emitting element 511a, but the light-emitting element 511a is evenly distributed on the upper surface of the circuit board 511. The reflective film can reflect the light leaked from the bottom of the light-emitting element 511a back to the light guiding member 512 for improving The use efficiency of light increases the brightness of the liquid crystal panel 52. In order to prevent the socket portion 512b from affecting the display of the liquid crystal panel 5, the socket portion 512b may be configured as an opaque portion. For example, a light absorbing material or a light reflecting material may be applied to the socket portion 512b.

The smart watch 10 according to the present invention can embed the light-emitting element 511a on the circuit board 511 in the recess 512c of the light guiding member 512, so that the upper surface of the circuit board 511 can be attached to the light guiding member 512. It is possible to prevent the light-emitting element 511a from increasing the thickness of the liquid crystal panel 5, thereby ensuring that the smart watch 10 has a thinner thickness.

Although the present invention has been described with reference to the preferred embodiments thereof, various modifications may be made without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A smart watch includes a watchband and a watch head, the watch head includes a housing having a positioning slot in which a liquid crystal screen is mounted, the liquid crystal panel including a backlight module arranged in order from bottom to top a liquid crystal panel, the backlight module includes a circuit board, a light guiding member, and a brightness enhancement film group arranged in order from bottom to top, the upper surface of the circuit board is provided with a plurality of light emitting elements, and the light guiding member and the circuit The surfaces on which the upper surfaces of the plates are attached are provided with a plurality of grooves capable of respectively accommodating the respective light-emitting elements.
The smart watch according to claim 1, wherein said light emitting element is an LED, and said groove has a truncated cone shape or a quadrangular prism shape.
The smart watch according to claim 2, wherein the four slopes of the quadrangular shaped groove are opposed to the four sides of the cubic LED.
The smart watch according to claim 1, wherein a reflective film is further provided on an upper surface of said circuit board.
The smart watch according to claim 1, wherein the light guiding member includes a plate portion provided between the brightness enhancement film group and the circuit board, and a socket formed at an outer edge of the plate portion The socket portion above the plate portion can accommodate the brightness enhancement film group and the liquid crystal panel, and the socket portion under the plate portion can accommodate the circuit board.
The smart watch of claim 5, wherein the socket is configured to be opaque.
The smart watch according to claim 1, wherein a protective cover capable of covering the liquid crystal panel is provided on the casing.
The smart watch according to claim 1, wherein the liquid crystal panel is a liquid crystal panel of a thin film transistor liquid crystal display.
The smart watch according to claim 1, wherein said brightness enhancement film group comprises a diffusion film, a brightness enhancement film, and a diffusion film which are sequentially arranged from bottom to top.
A liquid crystal panel comprising a backlight module and a liquid crystal panel which are attached to each other, the backlight module comprising a circuit board, a light guiding member and a brightness enhancement film group which are sequentially arranged toward the liquid crystal panel, wherein the circuit board The upper surface is provided with a plurality of light-emitting elements, and the surface of the light-guiding member that is in contact with the upper surface of the circuit board is provided with a plurality of grooves that can respectively accommodate the respective light-emitting elements.
The liquid crystal panel according to claim 10, wherein said light emitting element is an LED, and said groove has a truncated cone shape or a quadrangular prism shape.
The liquid crystal panel according to claim 11, wherein the four slopes of the groove are divided into four Don't oppose the four sides of the cube-shaped LED.
The liquid crystal panel according to claim 10, wherein a reflective film sheet is further provided on the upper surface of said circuit board.
The liquid crystal panel according to claim 10, wherein said light guiding member comprises a plate portion provided between said brightness enhancing film group and said circuit board, and a socket formed at an outer edge of said plate portion The socket portion above the plate portion can accommodate the brightness enhancement film group and the liquid crystal panel, and the socket portion under the plate portion can accommodate the circuit board.
The liquid crystal panel according to claim 14, wherein the socket portion is configured to be opaque.
The liquid crystal panel according to claim 10, wherein the liquid crystal panel is a liquid crystal panel of a thin film transistor liquid crystal display.
The liquid crystal panel according to claim 10, wherein said brightness enhancement film group comprises a diffusion film, a brightness enhancement film, and a diffusion film which are sequentially arranged from bottom to top.