CN111929942A

CN111929942A - Display screen and mobile terminal

Info

Publication number: CN111929942A
Application number: CN202010778144.5A
Authority: CN
Inventors: 罗光跃
Original assignee: Jiekai Communications Shenzhen Co Ltd
Current assignee: JRD Communication Shenzhen Ltd; Jiekai Communications Shenzhen Co Ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2020-11-13

Abstract

The application provides a display screen and mobile terminal, this display screen is including the optical filter that stacks gradually the setting, array substrate and the backlight unit including a plurality of colored backlight, wherein, substrate and the pixel electrode layer of the range upon range of setting of optical filter, the surface of keeping away from the pixel electrode layer at the substrate includes at least one transparent display area, thereby improve the luminousness of display screen in the at utmost, and simultaneously, through the cooperation of a plurality of colored backlight and transparent display area, can realize the normal color display function of display screen, not only promote backlight unit's utilization ratio, the display brightness of display screen has still been improved.

Description

Display screen and mobile terminal

Technical Field

The application relates to the technical field of display, in particular to a display screen and a mobile terminal.

Background

With the development of terminal technology and the continuous improvement of living standard, the mobile terminal has become a necessary product for people, and in daily use, the mobile terminal is inevitably used in outdoor environment, but because the ambient illumination of the outdoor environment is larger, the higher requirement on the display brightness of the mobile terminal is also provided.

At present, the display brightness of most terminal screens is 350-800 nits, the difficulty of continuously improving the display brightness is high, most of the existing methods for improving the display brightness are modes for increasing power consumption, and the cruising ability of the mobile terminal is seriously influenced.

Disclosure of Invention

The application provides a display screen and a mobile terminal, and aims to solve the technical problem that the display brightness of a terminal screen cannot be improved on the premise of unchanged power consumption of the conventional mobile terminal.

The technical scheme provided by the application is as follows:

the application provides a display screen, including light filter, array substrate and the backlight unit that stacks gradually the setting, wherein, the light filter is including the substrate and the pixel electrode layer that stack gradually the setting, the substrate is kept away from the surface of pixel electrode layer includes at least one transparent display area, every backlight unit includes a plurality of colored backlight sources.

In the display panel of the present application, the plurality of color backlights are sequentially turned on in a time-division driving manner.

In the display screen of the application, when the transparent display area is single, the pixel electrode corresponding to the transparent display area in the pixel electrode layer is driven in a time-sharing driving manner, and the driving time is adapted to the lighting time of each color backlight source.

In the display screen of the present application, the plurality of color backlights include a red backlight, a green backlight, and a blue backlight.

In the display screen of this application, when transparent display area is a plurality of, the substrate is kept away from pixel electrode layer still is provided with latticed black matrix on the surface, is used for with a plurality of transparent display area is isolated, wherein, every colored backlight corresponds at least one transparent display area, adjacent two transparent display area corresponds different colours colored backlight, in the pixel electrode layer the drive time of the pixel electrode that transparent display area corresponds suits rather than the lighting time of the colored backlight that corresponds.

In the display screen of the application, each color backlight source comprises a plurality of backlight lamps which are of the same color and are connected in series.

In the display screen, the backlight lamps corresponding to the color backlight sources with different colors are arranged at intervals.

In the display screen of this application, the display screen still includes the glass apron, sets up the light filter is kept away from on the surface of array substrate.

In the display screen of this application, the display screen still includes the liquid crystal layer, presss from both sides to be arranged in the light filter with between the array substrate.

The application also provides a mobile terminal which comprises the display screen.

The beneficial effect of this application does: be different from prior art, the display screen that this application provided is including the optical filter that stacks gradually the setting, array substrate and including the backlight unit of a plurality of colored backlight sources, wherein, the optical filter is including the substrate and the pixel electrode layer of range upon range of setting, the surface of keeping away from the pixel electrode layer at the substrate includes at least one transparent display area, thereby improve the luminousness of display screen in the at utmost, and simultaneously, through the cooperation of a plurality of colored backlight sources and transparent display area, can realize the normal colored display function of display screen, backlight unit's utilization ratio has not only been promoted, the display brightness of display screen has still been improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic top view of a conventional display screen according to an embodiment of the present disclosure;

fig. 2 is a schematic cross-sectional structural diagram of a display screen provided in an embodiment of the present application;

fig. 3 is a schematic top view of a display screen according to an embodiment of the present disclosure;

fig. 4 is a schematic cross-sectional structural diagram of a filter provided in an embodiment of the present application;

fig. 5 is a schematic top view illustrating a filter according to an embodiment of the disclosure;

fig. 6 is a schematic view illustrating an arrangement structure of a plurality of color backlights according to an embodiment of the present disclosure;

fig. 7 is a schematic view illustrating another arrangement structure of a plurality of color backlights according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram of driving timing sequences of a color backlight and a pixel electrode according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

It should be noted that the thicknesses and shapes in the drawings of the present application do not reflect actual proportions, but are merely intended to schematically illustrate the contents of the embodiments of the present application.

Referring to fig. 1, fig. 1 is a front view of a conventional display screen according to an embodiment of the present disclosure, in a conventional display screen 100, the conventional display screen mainly includes a glass cover 101, a filter (not shown), an array substrate (not shown), and a backlight module (not shown) stacked in sequence, wherein the filter is composed of a pixel electrode layer (not shown), a glass substrate (not shown), and the like, and further, three primary color (RGB) layers are coated on the glass substrate, for example, a plurality of red color layers 102, green color layers 103, and blue color layers 104 in fig. 1 jointly form the three primary color layers, and the color layers are separated by a black matrix (bm black matrix)105 to avoid color mixing of the connected color layers. Secondly, the backlight module includes a plurality of white backlights 106, and it should be noted that the positions of the backlights 106 should be at the lower layers of the glass cover 101, the optical filter and the array substrate, and the positions are shown here for visually seeing the differences between the backlights 106 in the existing display screen and the backlights in the display screen of the present application.

In the conventional display screen 100, after the backlight emitted from the backlight module enters the color filter, part of the energy is absorbed by the RGB color layer, and only the remaining backlight passes through the color filter, so that the overall transmittance of the panel is low, generally between 2% and 5%, for example, when the luminance of the white backlight is 10000nits, the luminance that a user can see is only 200 to 500nits, and if the display luminance is to be improved, the luminance of the white backlight needs to be improved, which will improve the power consumption of the mobile terminal. Therefore, the application provides a display screen and a mobile terminal to solve the technical problem that the display brightness of the display screen can only be increased by improving the power consumption of the mobile terminal in the existing display screen.

Referring to fig. 2 to 5, fig. 2, fig. 3, fig. 4, and fig. 5 are respectively a schematic cross-sectional structure diagram of a display screen, a schematic top-view structure diagram of the display screen, a schematic cross-sectional structure diagram of a filter, and a schematic top-view structure diagram of the filter according to an embodiment of the present disclosure. A display screen 10 comprises an optical filter 11, an array substrate 12 and a backlight module 13 which are sequentially stacked, wherein as shown in FIG. 4, the optical filter 11 comprises a substrate 111 and a pixel electrode layer 112 which are stacked, as shown in FIG. 3 and FIG. 5, the surface of the substrate 111 far away from the pixel electrode layer 112 comprises at least one transparent display region 1111, and each backlight module 13 comprises a plurality of color backlights (such as 131, 132 and 133 in FIG. 3). It should be noted that, for the sake of understanding, fig. 3 identifies a plurality of

color backlights

131, 132 and 133, and in fact, the plurality of

color backlights

131, 132 and 133 should be located at the lower layer of the filter 11 and the array substrate 12.

Specifically, in the conventional display screen, the RGB color layer is usually coated on the substrate to form the corresponding color display area, and in the optical filter 11 of the present application, the substrate 111 does not need to be coated with the RGB color layer, and the light transmittance of the corresponding transparent display area 1111 can be maintained at more than 90%, so that the light transmittance of the optical filter 11 is improved to the maximum extent.

In the present embodiment, the plurality of

color backlights

131, 132, and 133 are sequentially lit in a time-division driving manner.

Specifically, referring to fig. 8, fig. 8 is a schematic diagram of driving timing sequences of the color backlight and the pixel electrode provided in the present embodiment, for example, the color backlight in the present embodiment is a three-primary-color backlight, such as the red backlight 131, the green backlight 132, and the blue backlight 133 in fig. 3, and the driving timing sequences are shown in fig. 8, that is, the red backlight 131 is lit at time t1, the green backlight 132 is lit at time t2, and the blue backlight 133 is lit at time t 3. It should be noted that the driving sequence shown in fig. 8 is not intended to limit the present application, and the actual driving sequence may be changed, for example, the three primary color backlights may be simultaneously turned on, and at this time, the color displayed on the display screen 10 is white.

Specifically, as shown in fig. 3, the display screen 10 includes a glass cover plate 16 disposed on a surface of the filter 11 remote from the array substrate 12.

Specifically, the shape of the glass cover plate 16 should be adapted to the shape of the optical filter 11, and the upper limit of the thickness thereof is preferably 0.8mm, and the lower limit thereof is preferably 0.5 mm.

In some embodiments, the transparent display region 1111 may be single, the pixel electrodes 1121 corresponding to the transparent display region 1111 in the pixel electrode layer 112 are driven in a time-sharing driving manner, and the driving time is adapted to the lighting time of each of the

color backlights

131, 132 and 133.

Specifically, with continued reference to fig. 5, the substrate 111 includes a transparent display region 1111, when a single transparent display region 1111 is used to display each of the

color backlights

131, 132, and 133, the transparent display region 1111 is not isolated by a black matrix, and it should be noted that the peripheral region of the substrate 111 except the transparent display region 1111 is a non-display region.

It is understood that when the transparent display 1111 is single, the pixel density of the display screen 10 can be increased by N times, wherein N is a positive integer equal to the number of the plurality of

color backlights

131, 132 and 133.

Specifically, the number of the pixel electrodes 1121 is not limited herein, and one pixel electrode may be used, or a plurality of pixel electrodes using the same driving timing may be used.

In some embodiments, when there are a plurality of transparent display regions 1111, a grid-shaped black matrix 1112 is further disposed on a surface of the substrate 111 away from the pixel electrode layer 112 to isolate the plurality of transparent display regions 1111, wherein each of the

color backlights

131, 132, and 133 corresponds to at least one transparent display region 1111, the adjacent two transparent display regions 1111 correspond to color backlights with different colors, and the activation time of the pixel electrode 1121 corresponding to the transparent display region 111 in the pixel electrode layer 112 is adapted to the lighting time of the corresponding color backlight (131, 132, or 133).

Referring to fig. 3, the display screen 10 includes a plurality of transparent display areas 1111, and the transparent display areas 1111 are separated by a black matrix 1112, and the black matrix 1112 can prevent light mixing between the adjacent transparent display areas 1111, thereby improving the display contrast and reducing the external light reflection. So as to prevent the external light from irradiating the array substrate 13 and increasing the leakage current.

Referring to fig. 8, if the red backlight source corresponds to the first transparent display area and the first pixel electrode, the green backlight source corresponds to the second transparent display area and the second pixel electrode, and the blue backlight source corresponds to the third display area and the third pixel electrode, then at time t1, the first pixel electrode corresponding to the first transparent display area is driven while the red backlight source is turned on, and similarly, the second pixel electrode corresponding to the second transparent display area and the third pixel electrode corresponding to the third transparent display area are driven while the green backlight source and the blue backlight source are turned on. It should be noted that the driving sequence shown in fig. 8 is not intended to limit the present application, and the actual driving sequence is determined according to the situation, for example, when the three-primary backlight lamps are simultaneously turned on, the corresponding pixel electrodes are simultaneously driven.

Specifically, the backlight module 13 further includes a backlight driving circuit (not shown), and the array substrate 12 further includes a pixel driving circuit (not shown), and the pixel driving circuit is connected to the plurality of pixel electrodes 1121. In the actual operation of the display panel 10, when the plurality of color backlights 131, 132, and 133 in the backlight module 13 emit light, the light will irradiate the array substrate 12, and at the same time, the pixel driving circuit of the array substrate 12 energizes the corresponding pixel electrode 1121, so that the liquid crystal molecules at the corresponding position will deflect, and the light passes through the filter 11.

Specifically, the basic function of the black matrix 1112 is to shield light, and the basic material thereof may be chromium metal or acryl resin doped with black pigment (mainly carbon). In order to reduce the cost, a black resin may be formed by doping a raw material such as carbon, titanium, or nickel into the photoresist.

In some embodiments, each

color backlight

131, 132, and 133 includes a plurality of backlights of the same color and in series.

Preferably, the color backlights 131, 132, and 133 are three primary color backlights, i.e., a red backlight 131, a green backlight 132, and a blue backlight 133. Specifically, the three primary colors can synthesize all colors including monochromatic light.

In the present embodiment, the backlights corresponding to the color backlights 131, 132, and 133 with different colors are arranged at intervals.

Specifically, when there are a plurality of transparent display regions 1111, the backlight interval arrangement corresponding to the color backlights 131, 132, and 133 of different colors can make the display effect more uniform.

For example, referring to fig. 6 and 7, fig. 6 is a schematic diagram of an arrangement structure of a plurality of color backlights provided in the present embodiment, and fig. 7 is a schematic diagram of another arrangement structure of a plurality of color backlights provided in the present embodiment, as shown in fig. 6, the plurality of color backlights are arranged in a row direction at intervals in sequence by using color backlights with different colors, and the color backlights with the same color are arranged one by one in a column direction, and it is assumed that the plurality of color backlights are three primary color backlights, that is, a red backlight 1311, a green backlight 1321, and a blue backlight 1331, wherein the red backlight 1311, the green backlight 1321, and the blue backlight 1331 are arranged in a row direction at intervals in sequence, and each column in the column direction has only the red backlight 1311, the green backlight 1321, and the blue backlight 1331. As shown in fig. 7, the color backlights are arranged in a manner of being sequentially spaced in the row direction and the column direction by using color backlights of different colors, for example, if the color backlights are three primary color backlights, i.e., a red backlight 1312, a green backlight 1322, and a blue backlight 1332, and in the row direction and the column direction, the red backlight 1312, the green backlight 1322, and the blue backlight 1332 are sequentially spaced in the row direction and the column direction.

Specifically, when the color backlights 131, 132, and 133 are three-primary-color LED backlights, if the three-primary-color LEDs meet the following dominant wavelength requirement, the screen display effect can achieve one hundred percent of BT2020 color gamut coverage:

red backlight source: 630 nm; green backlight source: 532 nm; blue backlight source: 467 nm.

Specifically, the backlight source is used for providing a light source with uniformly distributed brightness for the display screen 10, and may be divided into an edge type structure and a direct type structure according to different light source distribution positions, where the surface of the backlight source near the array substrate 12 is sequentially stacked with an upper diffusion sheet (not shown), a prism sheet (not shown), and a lower diffusion sheet (not shown), where the lower diffusion sheet is used for homogenizing light emitted from below, and the prism sheet is used for concentrating dispersed light within a certain angle range by using total reflection and refraction laws, so as to improve brightness within the angle range, and the upper diffusion sheet is used for protecting the backlight source from being soiled or scratched by an external object, and simultaneously protecting the array substrate 12 from being scratched by the prism sheet.

In some embodiments, the display screen 10 further includes a liquid crystal layer 14 sandwiched between the optical filter 11 and the array substrate 12.

Specifically, the filter 11 and the array substrate 12 are bonded together by the frame sealing adhesive 15 at the periphery of the liquid crystal layer 14, so as to achieve the effect of preventing leakage of liquid crystal molecules.

Specifically, the sealant 15 is an adhesive composed of chemical substances such as resin, photo-registration starting material, photo-registration stopping material, and hardening agent, and is heated by UV irradiation and a hot air furnace to promote a chemical reaction inside the sealant to form a stable three-dimensional bridging structure, so that the sealant has sufficient adhesion strength for adhering the optical filter 11 and the array substrate 12, thereby forming a display screen with a stable box thickness.

In the embodiment, an alignment film (not shown) is coated on the surface 14 of the filter 11 close to the liquid crystal layer and the surface of the array substrate 12 close to the liquid crystal layer 14, and is used for endowing the liquid crystal with directionality, enabling the liquid crystal to be aligned in a uniform direction, forming a pre-tilt angle, and enabling the liquid crystal to return to an original state after the electric field disappears.

Specifically, the raw material of the alignment film is mainly Polyamic acid (PPA) and/or soluble polyimide (soluble polyimide).

In some embodiments, spherical or columnar fine particles (not shown in the figure) are further disposed between the filter 11 and the array substrate 12, wherein the spherical fine particles are mainly made of melamine resin, urea resin, polystyrene resin, or the like, and the columnar fine particles are mainly made of UV-curable acryl resin, and specifically, by uniformly dispersing the spherical or columnar fine particles between the filter 11 and the array substrate 12, the uniformity of the cell thickness can be effectively controlled.

In some embodiments, a planarization layer (OC layer) (not shown) is further disposed on the surface of the substrate 111 away from the pixel electrode layer 112, which can planarize the surface of the filter 11. The material of the OC layer is propylene resin.

In some embodiments, a GOA circuit board (not shown) is disposed on a surface of the array substrate 12 away from the backlight module 13, and is used for providing a progressive scanning signal to the gate lines in the display area.

In some embodiments, a spacer (not shown) is further disposed on a surface of the array substrate 12 close to the filter 11, and the spacer covers a surface of the GOA circuit board far from the array substrate 12. The length of the spacer is larger than that of the GOA circuit board, the width of the spacer is wider than that of the GOA circuit board, and the thickness of the spacer can be 2-4 microns. In addition, the spacer is made of an insulating material. Because the size of the shock insulator is slightly larger than the GOA circuit board, the shock insulator can completely cover the GOA circuit board, so that the contact between the GOA circuit and impurity particles can be effectively prevented, and the short circuit of the GOA circuit and the failure and invalidation of the liquid crystal display panel are prevented.

In addition, the array substrate 12 further includes a driving chip (not shown), the driving chip is disposed outside the coverage of the spacer, and the driving chip can be electrically connected to the GOA circuit in the product application process.

Be different from prior art, the display screen 10 that this application provided is including the optical filter 11 that stacks gradually the setting, array substrate 12 and backlight unit 13, wherein, optical filter 11 includes substrate 111, the surface of keeping away from pixel electrode layer 112 at substrate 111 includes at least one transparent display area 1111, thereby the luminousness of display screen 10 has been improved to the at utmost, and simultaneously, backlight unit 13 includes a plurality of

colored backlight

131, 132 and 133, through a plurality of

colored backlight

131, 132 and 133 and the cooperation of transparent display area 1111, can realize the normal color display function of display screen 10, the utilization ratio of backlight unit 13 has not only been improved, the display brightness of display screen 10 has still been improved.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a mobile terminal provided in an embodiment of the present application, where the mobile terminal 20 includes the display screen 21 described in any one of the foregoing embodiments.

In the present embodiment, the mobile terminal 20 further includes a processor (not shown) for executing an application program stored in the memory, thereby executing various functional applications and data processing.

In this embodiment, the mobile terminal may further include a memory (not shown in the figure), the memory may be used to store software programs and modules, and the processor executes various functional applications and data processing by running the software programs and modules stored in the memory, that is, implements a communication data saving function. The memory may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory may further include memory located remotely from the processor, which may be connected to the mobile terminal 20 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The processor is the control center of the mobile terminal 20. The processor connects various parts of the entire mobile terminal 20 using various interfaces and lines, performs various functions of the mobile terminal 20 and processes data by running or executing an application program stored in the memory and calling data stored in the memory, thereby monitoring the mobile terminal 20 as a whole. Optionally, the processor may include one or more processing cores; in some embodiments, the processor may integrate an application processor that handles primarily operating systems, user interfaces, applications, etc., and a modem processor that handles primarily wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor.

In the above embodiment, the mobile terminal 20 may be a notebook, a tablet computer, a mobile phone, and the like, which is not limited in this embodiment.

In addition to the above embodiments, other embodiments are also possible. All technical solutions formed by using equivalents or equivalent substitutions fall within the protection scope of the claims of the present application.

In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.

Claims

1. The display screen is characterized by comprising an optical filter, an array substrate and a backlight module which are sequentially stacked, wherein the optical filter comprises a substrate and a pixel electrode layer which are stacked, the surface of the substrate, which is far away from the pixel electrode layer, comprises at least one transparent display area, and each backlight module comprises a plurality of color backlight sources.

2. A display panel as recited in claim 1, wherein the plurality of color backlights are illuminated sequentially in a time-shared drive.

3. The display panel according to claim 2, wherein when the transparent display area is single, the pixel electrodes corresponding to the transparent display area in the pixel electrode layer are driven in a time-sharing driving manner, and the driving time is adapted to the lighting time of each of the color backlights.

4. A display screen in accordance with claim 2, wherein the plurality of color backlights comprises a red backlight, a green backlight, and a blue backlight.

5. The display screen according to claim 2, wherein when there are a plurality of transparent display areas, a grid-shaped black matrix is further disposed on a surface of the substrate away from the pixel electrode layer, so as to isolate the plurality of transparent display areas, wherein each of the color backlights corresponds to at least one of the transparent display areas, two adjacent transparent display areas correspond to the color backlights with different colors, and a driving time of a pixel electrode corresponding to the transparent display area in the pixel electrode layer is adapted to a lighting time of the corresponding color backlight.

6. A display screen in accordance with claim 1, wherein each of the color backlights comprises a plurality of backlights of the same color and connected in series.

7. A display screen according to claim 6, wherein the backlight lamps corresponding to the different colored backlights are spaced apart.

8. The display screen of claim 1, further comprising a glass cover plate disposed on a surface of the filter away from the array substrate.

9. The display screen of claim 1, further comprising a liquid crystal layer interposed between the optical filter and the array substrate.

10. A mobile terminal, characterized in that it comprises a display screen according to any one of claims 1 to 9.