Display panel and display device

Embodiments of the present disclosure disclose a display panel and a display device. In the display panel, an array base plate is located on a light exit side of the display panel and includes a binding part. The binding part includes a plurality of binding terminals. A circuit board assembly is bound to the plurality of binding terminals and includes a plurality of electronic components. The circuit board assembly is bent to a side of a color film base plate that is away from the array base plate. Each of the electronic components is located on a side of the circuit board assembly that is away from the color film base plate.

FIELD OF INVENTION

BACKGROUND OF INVENTION

In a conventional display panel without frames on four sides, an array base plate is required to face a user. After a printed circuit board is bound, an electronic component on the printed circuit board is bent to a back face of the display panel and is located between the printed circuit board and a backlight module.

During the research and practice of the prior art, the inventor of the present disclosure finds that, since the electronic component is located between the printed circuit board and the backlight module, the display panel is not easily detected.

SUMMARY OF INVENTION

Technical Problem

Embodiments of the present disclosure provide a display panel and a display device, which facilitates detection of the display panel.

Technical Solution

An embodiment of the present disclosure provides a display panel, including:a color film base plate, located on a light entry side of the display panel;an array base plate, located on a light exit side of the display panel and including a binding part located in a non-display area, wherein the binding part includes a plurality of binding terminals;a liquid crystal (LC), disposed between the array base plate and the color film base plate; anda circuit board assembly, bound to the plurality of binding terminals and including a plurality of electronic components, whereinwhen the circuit board assembly is in a bent state, the circuit board assembly is bent to a side of the color film base plate that is away from the array base plate, and each of the electronic components is located on a side of the circuit board assembly that is away from the color film base plate.

Optionally, in some embodiments of the present disclosure, the circuit board assembly includes:a printed circuit board, including a first substrate and a plurality of first conductive pads, wherein the first substrate includes a first face and a second face disposed opposite to the first face, the plurality of first conductive pads are disposed on the first face, and each electronic component is disposed on the second face; anda flexible circuit board, wherein one end of the flexible circuit board is electrically connected to each of the binding terminals, and the other end of the flexible circuit board is electrically connected to each of the first conductive pads.

Optionally, in some embodiments of the present disclosure, the printed circuit board further includes a plurality of first traces and a plurality of conductors, the first traces are disposed on the second face, and the electronic components are connected to the first traces; andeach first conductive pad is connected to one first trace using one conductor.

Optionally, in some embodiments of the present disclosure, holes in a one-to-one correspondence with the first conductive pads are provided on the first substrate, and each conductor is disposed in each hole.

Optionally, in some embodiments of the present disclosure, the first substrate further includes a side wall face connected to the first face and the second face, and each conductor is disposed on the side wall face.

Optionally, in some embodiments of the present disclosure, a material of the conductor is selected from one or a combination of metal, metallic oxide, and metal alloy.

Optionally, in some embodiments of the present disclosure, the flexible circuit board includes a second substrate, a second trace, a second conductive pad, and a third conductive pad, the second trace is disposed on the second substrate, the second conductive pad is connected to one end of the second trace, and the third conductive pad is connected to the other end of the second trace; andthe second conductive pad is electrically connected to the binding terminal, and the third conductive pad is electrically connected to the first conductive pad.

Correspondingly, an embodiment of the present disclosure further provides a display device, including:a backlight module; andthe display panel as described in the above embodiment and disposed on a light exit side of the backlight module, whereinwhen the circuit board assembly is in a bent state, the circuit board assembly is bent to a side of the backlight module that is away from the display panel, and each of the electronic components is located on a side of the circuit board assembly that is away from the backlight module.

Optionally, in some embodiments of the present disclosure, the display device further includes a fixing frame and a back panel, a first placing groove and a second placing groove are provided on the fixing frame, and the first placing groove is opposite to and communicates with the second placing groove; andthe display panel is disposed in the first placing groove, the backlight module is disposed in the second placing groove, and the back panel is disposed on the side of the backlight module that is away from the display panel and located in the second placing groove.

Optionally, in some embodiments of the present disclosure, a circuit board assembly includes a printed circuit board and a flexible circuit board, the printed circuit board includes a first substrate and a plurality of first conductive pads, the first substrate includes a first face and a second face disposed opposite to the first face, the plurality of first conductive pads are disposed on the first face, and each electronic component is disposed on the second face; and

the display device further includes an insulating adhesive layer, and the insulating adhesive layer is disposed on a side of the back panel that is away from the backlight module and connected to the first face.

Beneficial Effects

According to the embodiments of the present disclosure, when the circuit board assembly is in a bent state, the circuit board assembly is bent to the side of the color film base plate that is away from the array base plate, and the electronic component is located on the side of the circuit board assembly that is away from the color film base plate. In this way, the electronic component is exposed, facilitating detection of lines in the display panel.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The technical solutions of the embodiments of the present disclosure are clearly and completely described in the following with reference to the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are merely some but not all of the embodiments of the present disclosure. All other embodiments obtained by a person skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure. In addition, it should be understood that the specific implementations described herein are merely used for describing and illustrating the present disclosure, but are not intended to limit the present disclosure. In the present disclosure, unless otherwise stated, the directional terms such as “up” and “down” generally refer to directions when a device is in actual use or a working state, and specifically refer to drawing directions in the corresponding drawing; and “inside” and “outside” refer to positions relative to the contour of the device.

The embodiments of the present disclosure provide a display panel and a display device, which are described in detail below. It should be noted that, the description order of the following embodiments is not intended to limit preference orders of the embodiments.

Referring toFIG.1andFIG.2, a display panel100provided in the embodiment of the present disclosure includes a color film base plate11, an LC12, an array base plate13, and a circuit board assembly14.

It should be noted that the display panel100may be a conventional display panel. That is to say, the color film base plate11includes a color film layer, and the array base plate13includes a circuit driving structure. The display panel100may also be applicable to a color filter on array (COA) display panel. That is to say, the color film layer is disposed on the array base plate13, and the color film base plate11does not include the color film layer.

The color film base plate11is located on a light entry side of the display panel100. The array base plate13is located on a light exit side of the display panel100. The LC12is disposed between the color film base plate11and the array base plate13.

The array base plate13includes a binding part131in a non-display area BD and a display part132in a display area AA. The binding part131includes a plurality of binding terminals1311.

The circuit board assembly14is bound to the plurality of binding terminals1311and includes a plurality of electronic components14a.

When the circuit board assembly14is in a bent state, the circuit board assembly14is bent to a side of the color film base plate11that is away from the array base plate13. Each of the electronic components14ais located on a side of the circuit board assembly14that is away from the color film base plate11.

In the embodiment of the present disclosure, when the circuit board assembly14is in a bent state, the circuit board assembly14is bent to the side of the color film base plate11that is away from the array base plate13. Each electronic component14ais located on the side of the circuit board assembly14that is away from the color film base plate11. In this way, the electronic component14ais exposed, facilitating detection of lines in the display panel100.

Referring toFIG.3, the circuit board assembly14further includes a printed circuit board14band a flexible circuit board14c. One end of the flexible circuit board14cis electrically connected to the binding part131. Other end of the flexible circuit board14cis electrically connected to the printed circuit board14b.

Optionally, the flexible circuit board14cmay be a chip on film (COF), or may be a flexible printed circuit board having no chip disposed therein.

Optionally, the electronic component14aincludes but is not limited to a chip, a connector, a light-emitting diode (LED) lamp, and keys.

Referring toFIG.3andFIG.4, the printed circuit board14bincludes a first substrate141, a plurality of first conductive pads142, a plurality of first traces143, and a plurality of conductors144. The first substrate141includes a first face D1and a second face D2disposed opposite to the first face D1. The plurality of first conductive pads142are disposed on the first face D1. The electronic component14ais disposed on the second face D2. The first traces143are disposed on the second face D2.

The electronic components14aare connected to the first traces143. The first traces143are connected to the first conductive pads142. Each first conductive pad142is connected to one first trace143using one conductor144.

The electronic component14aand the first conductive pad142are disposed on different faces. When the array base plate13is used as a light exit side of the display panel100, the electronic component14ais exposed, which facilitates the detection and maintenance of lines.

Optionally, holes145in a one-to-one correspondence with the first conductive pads142are provided on the first substrate141, and each conductor144is disposed in each hole145.

Optionally, the conductor144includes a first portion1441, a second portion1442, and a third portion1443. The first portion1441is disposed in the hole145. The second portion1442is connected to one end of the first portion1441and covers a part of the first trace143. The third portion1443is connected to the other end of the first portion1441and covers a part of the first conductive pad142.

The arrangement of the second portion1442and the third portion1443improves the stability of connection of the conductor144to the first trace143and the first conductive pad142. In addition, the second portion1442covers the part of the first trace143, and the third portion1443covers the part of the first conductive pad142. In this way, a connection area of the conductor144and the first conductive pad142and a connection area of the conductor144and the first trace143are increased, thereby reducing impedance.

Optionally, a material of the conductor144is selected from one or a combination of metal, metallic oxide, and metal alloy.

One end of the flexible circuit board14cis electrically connected to each binding terminal1311. The other end of the flexible circuit board14cis electrically connected to the first conductive pad142. The flexible circuit board14cincludes a second substrate146, a second trace147, a second conductive pad148, and a third conductive pad149.

The second trace147is disposed on the second substrate146. The second conductive pad148is connected to one end of the second trace147, and the third conductive pad149is connected to the other end of the second trace147.

The second conductive pad148is electrically connected to the binding terminal1311. The third conductive pad149is electrically connected to the first conductive pad142.

Optionally, the conductor144is disposed on an outer side of the third conductive pad149. That is to say, the conductor144is prevented from overlapping the third conductive pad149, thereby improving the connection stability and electrical performance of the first conductive pad142and the third conductive pad149.

Optionally, materials of the binding terminal1311, the first conductive pad142, the second conductive pad148, and the third conductive pad149may each include one or a combination of metal, metallic oxide, and metal alloy, such as copper, indium tin oxide, copper/titanium alloy, and the like.

The binding terminal1311is connected to the second conductive pad148using a conductive adhesive. The first conductive pad142is connected to the third conductive pad149using the conductive adhesive.

Optionally, in some embodiments, referring toFIG.5, a difference between the embodiment and the foregoing embodiments is that positions of the conductors144are different. In detail, the first substrate141further includes a side wall face D3connected to the first face D1and the second face D2, and the conductor144is disposed on the side wall face D3.

The conductor144may be disposed on the side wall face D3by means of transfer print. Disposing the conductor144on the side wall face D3prevents holes from being formed on the first substrate141. This is a relatively simplified process.

A preparation process of the display panel100of the present embodiment includes steps as follows.

The color film base plate11, the LC12, and the array base plate13are first assembled to form an LC cell. One end of the flexible circuit board14cis then bound to the binding part131of the array base plate13. Next, the LC cell is fixed to a first platform, and the printed circuit board14bhaving the electronic component14aassembled therein is fixed to a second platform. A plurality of avoidance grooves are provided on the second platform, and the electronic component14ais disposed in each avoidance groove. Second, the flexible circuit board14cis aligned to the first conductive pad142. Then a pressure head is used to press the flexible circuit board14cand the first conductive pad142to fixedly connect the flexible circuit board to the first conductive pad. In this way, the binding of the display panel100is completed. Finally, the flexible circuit board14cis bent, and the printed circuit board14band the electronic component14aare folded to the back face of the color film base plate11, so that the electronic component14ais exposed, which facilitates plugging of lines and line tests.

Referring toFIG.6, correspondingly, the embodiment of the present disclosure further provides a display device1000. The display device includes the display panel100, the backlight module200, the fixing frame300, and the back panel400in the above embodiment.

The display panel100is disposed on a light exit side of the backlight module200. A first placing groove F1and a second placing groove F2are provided on the fixing frame300. The first placing groove F1is opposite to and communicates with the second placing groove F2.

An LC cell of the display panel100is disposed in the first placing groove F1. The backlight module200is disposed in the second placing groove F2. The back panel400is disposed on a side of the backlight module200that is away from the display panel100and is located in the second placing groove F2.

The display panel of the display device1000is the display panel100of the above embodiment. For details of the display panel100, refer to the content of the display panel100in the above embodiment.

Optionally, the backlight module200may be a direct-lit backlight module, or may be a side-in backlight module. Since the backlight module200is the prior art, details will be not described herein again.

Optionally, the fixing frame300may be an adhesive frame. The back panel400may be a metal back panel, such as an iron back panel.

When the circuit board assembly14is in a bent state, the circuit board assembly14is bent to the side of the backlight module200that is away from the display panel100. The electronic component14ais located on the side of the circuit board assembly14that is away from the backlight module200.

Referring toFIG.3andFIG.4, the printed circuit board14bincludes a first substrate141, a plurality of first conductive pads142, a plurality of first traces143, and a plurality of conductors144. The first substrate141includes a first face D1and a second face D2disposed opposite to the first face D1. The plurality of first conductive pads142are disposed on the first face D1. The electronic component14ais disposed on the second face D2. The first traces143are disposed on the second face D2.

The electronic components14aare connected to the first traces143. The first traces143are connected to the first conductive pads142. Each first conductive pad142is connected to one first trace143using one conductor144.

The electronic component14aand the first conductive pad142are disposed on different faces. When the array base plate13is used as a light exit side of the display panel100, the electronic component14ais exposed, which facilitates the detection and maintenance of lines.

Optionally, holes145in a one-to-one correspondence with the first conductive pads142are provided on the first substrate141, and each conductor144is disposed in each hole145.

Optionally, the conductor144includes a first portion1441, a second portion1442, and a third portion1443. The first portion1441is disposed in the hole145. The second portion1442is connected to one end of the first portion1441and covers a part of the first trace143. The third portion1443is connected to the other end of the first portion1441and covers a part of the first conductive pad142.

The arrangement of the second portion1442and the third portion1443improves the stability of connection of the conductor144to the first trace143and the first conductive pad142. In addition, the second portion1442covers the part of the first trace143, and the third portion1443covers the part of the first conductive pad142. In this way, a connection area of the conductor144and the first conductive pad142and a connection area of the conductor144and the first trace143are increased, thereby reducing impedance.

Optionally, a material of the conductor144is selected from one or a combination of metal, metallic oxide, and metal alloy.

One end of the flexible circuit board14cis electrically connected to each binding terminal1311. The other end of the flexible circuit board14cis electrically connected to the first conductive pad142. The flexible circuit board14cincludes a second substrate146, a second trace147, a second conductive pad148, and a third conductive pad149.

The second trace147is disposed on the second substrate146. The second conductive pad148is connected to one end of the second trace147, and the third conductive pad149is connected to the other end of the second trace147.

The second conductive pad148is electrically connected to the binding terminal1311. The third conductive pad149is electrically connected to the first conductive pad142.

Optionally, the conductor144is disposed on an outer side of the third conductive pad149. That is to say, the conductor144is prevented from overlapping the third conductive pad149, thereby improving the connection stability and electrical performance of the first conductive pad142and the third conductive pad149.

Optionally, in some embodiments, referring toFIG.5, a difference between the embodiment and the foregoing embodiments is that positions of the conductors144are different. In detail, the first substrate141further includes a side wall face D3connected to the first face D1and the second face D2, and the conductor144is disposed on the side wall face D3.

The conductor144may be disposed on the side wall face D3by means of transfer print. Disposing the conductor144on the side wall face D3prevents holes from being formed on the first substrate141. This is a relatively simplified process.

The display device1000further includes an insulating adhesive layer500. The insulating adhesive layer500is disposed on the side of the back panel400that is away from the backlight module200and connected to the first face D1.

According to the display device1000of the embodiments of the present disclosure, the flexible circuit board14cis bent to fold the printed circuit board14band the electronic component14ato the back face of the color film base plate400, and the electronic component14ais exposed. This facilitates the detection of lines in the display panel, and a risk of short circuits of the electronic component14aand the back panel400is also avoided.

A display panel and a display device provided in the embodiments of the present disclosure are described above in detail. Although the principles and implementations of the present disclosure are described by using specific examples in this specification, the descriptions of the foregoing embodiments are merely used for helping understand the method and the core idea of the method of the present disclosure. Meanwhile, a person of ordinary skill in the art may make modifications to the specific implementations and application range according to the ideas of the present disclosure. In conclusion, the content of the specification is not to be construed as a limitation to the present disclosure.