CN111816073A - Display module, display device and calibration method of display module - Google Patents

Abstract

Embodiments of the present application provide a display module, a display device, and a calibration method for the display module, which relate to the technical field of display devices, and are used to improve the problem that the display module affects the display effect due to the presence of ink borders on the glass cover plate. The display module includes a display panel and a transparent cover plate, the display panel has a pixel area composed of pixel points; along the display direction of the pixel area, the transparent cover plate is arranged on the outer side of the display panel; In the projection of the pixel area to the transparent cover plate along the display direction, the edge of the pixel area at least coincides with the edge of the coverage area of the transparent cover plate.

Description

Display module, display device and calibration method of display module

technical field

The embodiments of the present application relate to the technical field of display devices, and in particular, to a display module, a display device, and a calibration method for the display module.

Background technique

The display module includes a display panel and a driver chip. The display panel can be generally divided into a liquid crystal panel and an OLED (Organic Light-Emitting Diode, organic light-emitting semiconductor) panel according to different display principles. The driver chip controls the work of the display panel to display content.

The related art provides a display module, the display module includes a display panel and a glass cover, the glass cover is attached to the outside of the display panel, and the glass cover is attached to the display panel to achieve a certain protective effect on the display panel . As shown in FIG. 1 , the display panel includes a display area 1 and a non-display area 2 . A plurality of pixels are arranged in the display area 1 , and the plurality of pixels are used for displaying content. The non-display area 2 is arranged around the outside of the display area 1, and the non-display area 2 can be used for wiring of the display panel. As shown in FIG. 2 , the glass cover is printed with ink corresponding to the non-display area 2 of the display panel, the ink forms a closed ink frame 4 on the glass cover, and the area surrounded by the ink frame 4 is the viewing area 3 of the glass cover. The area 3 is set corresponding to the display area 1 of the display panel, and the display area 1 is displayed through the viewing area 3. In the display module in the related art, the setting of the ink frame 4 can block the non-display area 2 of the display panel, so that the display module is more beautiful.

However, the existence of the ink frame also causes a relatively obvious frame around the display area of the display module, which affects the display effect of the display module.

SUMMARY OF THE INVENTION

In view of this, an embodiment of the present application proposes a display module, a display device, and a calibration method for the display module, which are used to improve the problem that the display module affects the display effect due to the ink frame of the glass cover plate in the related art.

Based on the above purpose, in the first aspect, an embodiment of the present application provides a display module, including a display panel and a transparent cover plate, the display panel has a pixel area composed of pixel points; along the display direction of the pixel area, the The transparent cover plate is arranged on the outer side of the display panel; in the projection of the pixel area to the transparent cover plate along the display direction, the edge of the pixel area is at least the edge of the coverage area of the transparent cover plate coincide.

In the display module with the above structure, the edge of the pixel area at least coincides with the edge of the coverage area of the transparent cover plate, that is, the coverage area is located in the pixel area, that is, the pixel area of the display panel is larger than the coverage area of the transparent cover plate, The coverage area of the transparent cover is made of pixels that can be displayed in the display panel, and the non-display area in the display panel is located outside the coverage area after exceeding the coverage area, without the need for printing ink to block, and there is no ink frame, so it can be Realize the frameless display effect of the display module.

In a possible implementation manner, the transparent cover plate and the display panel are curved structures that cooperate with each other.

In a possible implementation, the transparent cover includes a cover body and a cover edge, one end of the cover edge is connected to a side of the cover body, and the other end of the cover edge faces toward The side where the display panel is located is bent and extended; the display panel is a flexible panel attached to the inner side of the transparent cover plate.

In a possible implementation manner, the display module further includes a curved circuit board, one end of the curved circuit board is connected to an end of the display panel, and the other side of the curved circuit board is bent and extended to the The display panel is at one side away from the transparent cover plate, and the curved circuit board is provided with a driving chip for controlling the display of the display panel. By adopting the curved circuit board with the above structure, the space occupied by the curved display panel can be fully utilized, and the volume of the display module can be reduced.

In a possible implementation manner, the display panel is a flexible OLED panel or a flexible liquid crystal panel.

In a possible implementation manner, an edge end face of the transparent cover plate is provided with a light shielding portion to prevent light leakage. By arranging the light-shielding portion, edge light leakage of the transparent cover plate after the display panel is lit can be prevented, and the display effect of the display module can be improved.

In a possible implementation manner, the light shielding portion is a black tape attached to the edge end face.

In a possible implementation manner, a polarizer is disposed between the display panel and the transparent cover plate, the polarizer is attached to the outside of the display panel, and the transparent cover plate is bonded to the display panel by optical bonding. outside of the polarizer.

In a second aspect, an embodiment of the present application provides a display device, comprising an installation casing and a display module mounted on the installation casing as described in the embodiment of the first aspect, wherein the installation casing has a function to avoid the display The avoidance space of the convex end of the panel.

The display device provided in the second aspect includes the display module described in the first aspect, and thus also has the beneficial technical effects of the above-mentioned display module. For details, please refer to the relevant description above.

In a third aspect, an embodiment of the present application provides a calibration method for a display module, which is applied to the display module described in the embodiment of the first aspect. The display module includes a driver chip for controlling the display of the display panel, including :

Drive the display panel to display the calibration point;

acquiring the outline of the transparent cover plate and the first coordinate value of the calibration point relative to a first coordinate system, wherein the first coordinate system is a coordinate system with the outline as a reference;

Calculate the second coordinate value of the reference point corresponding to the calibration point in the outline;

calculating a coordinate deviation value of the first coordinate value relative to the second coordinate value;

The pixel coordinates of the registers in the driver chip are compensated according to the coordinate deviation value.

By adopting the above-mentioned calibration method of the display module, the pixel coordinate compensation of the register in the driver chip is based on the outline of the transparent cover, thereby avoiding the display deviation caused by the misalignment of the assembly of the display panel and the transparent cover, and ensuring the display The borderless display effect of the module.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is one or more embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic structural diagram of a display panel provided by the related art;

2 is a schematic structural diagram of a glass cover plate provided by the related art;

3 is a front view of a display module provided by an embodiment of the present application;

4 is a side view of a display module provided by an embodiment of the present application;

Fig. 5 is a partial enlarged view of Fig. 4;

6 is a flowchart of a calibration method for a display module provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of a calibration method for a display module provided by an embodiment of the present application.

Description of reference numbers:

1-Display area, 2-Non-display area, 3-View area,

4-ink frame, 5-transparent cover, 6-display panel,

7-drive chip, 8-shading part, 9-optical adhesive layer,

10-polarizer, 11-flex circuit board, 12-flexible circuit board,

13 - Calibration point.

Detailed ways

The display module in the related art includes a display panel and a glass cover, and the ink frame in the glass cover can block the non-display area of the display panel, making the display module more beautiful. However, the existence of the ink frame also causes a relatively obvious frame around the display area of the display module, which affects the display effect of the display module.

In view of this, the embodiment of the present application provides a display module, in which the coverage area of the transparent cover plate is located in the pixel area, so that the coverage area of the transparent cover plate is all pixels that can be displayed in the display panel point, so that the non-display area in the display panel is located outside the coverage area beyond the coverage area, no printing ink is needed, and there is no ink border, so the display module can achieve a borderless display effect.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

3 is a front view of a display module provided by an embodiment of the application, FIG. 4 is a side view of a display module provided by an embodiment of the application, and FIG. 5 is a partial enlarged view of FIG. 4; As shown in FIG. 5 , the display module includes a transparent cover 5 , a display panel 6 and a driving chip 7 .

The display panel 6 is a curved surface structure formed by a flexible panel, and the flexible panel may be a flexible OLED (Organic Light-Emitting Diode, organic light-emitting semiconductor) panel and a flexible liquid crystal panel. In this embodiment, a flexible OLED panel is used as an example for description. The flexible OLED panel is a self-luminous display panel. This type of display panel can realize the display function without the need for a backlight layer and a liquid crystal layer, so that the display panel 6 can be thinner and lighter. Bending is easier to achieve.

The display panel 6 includes a panel body and a panel edge, the panel body is a rectangular plate-like structure, and the four side positions of the rectangular plate-like structure are connected with the panel edges. One end of the panel edge is connected to the side end of the panel body, and the other end of the panel edge is bent and extended toward one side of the panel body, thereby forming a curved screen structure. The bending and extending direction of the panel edge is generally away from the display direction of the panel body, where the display direction refers to the direction in which the display content faces when the display panel 6 is lit, and the viewer is located in front of the display direction when in use. For a flat screen, the display direction is usually perpendicular to the display surface of the screen, while for a curved screen, the display direction is usually the radial direction of the curved structure. In this embodiment, the display panel 6 is a flexible OLED panel, and the panel body and the panel edge are formed after being laminated with the transparent cover plate 5 , that is, the display panel 6 is bent under the restriction of the transparent cover plate 5 .

The display panel 6 is densely covered with a plurality of pixel points, and an area formed by the plurality of pixel points is a pixel area. The display direction of the display panel is also the display direction of the pixel area, and can also be understood as the light-emitting direction of the pixel. For the flexible OLED panel in this embodiment, the pixels are composed of luminous bodies of different colors, and the arrangement type of the luminous bodies is not limited in this embodiment, which can be standard RGB arrangement, RGB PenTile arrangement, RGB Delta arrangement, RGBW arrangement and RGB S-Strip arrangement, etc.

The transparent cover plate 5 is attached to the outer side of the display panel 6 along the display direction to achieve a certain protection function for the display panel 6 , and the transparent cover plate 5 can be made of glass, such as tempered glass. In a possible implementation manner, the transparent cover plate 5 may also adopt other transparent materials, such as acrylic.

The transparent cover plate 5 is a curved surface structure matched with the display panel 6 , and includes a cover plate body and a cover plate edge. The cover plate body is a rectangular plate-like structure, and the four side edges of the rectangular plate-like structure are connected to the cover plate edges. One end of the edge of the cover plate is connected to the edge of the cover plate body, and the other end of the edge of the cover plate is bent and extended toward the side of the panel body, thereby forming a 3D cover plate. The 3D cover plate restricts the bending deformation of the flexible OLED panel through the inner side. When the bending extension direction of the panel edge is away from the display direction of the panel body, the extension direction of the cover plate edge is also away from the display direction of the panel body.

When the transparent cover plate 5 is attached to the display panel 6, the transparent cover plate 5 is attached to the outside of the display panel 6, the area covered by the transparent cover plate 5 is the coverage area, and the pixel area is projected to the transparent cover plate 5 along the display direction. , the edge of the pixel area at least coincides with the edge of the area covered by the transparent cover 5 . Here at least coincidence means that among the edges of the pixel area, all the edges of the pixel area coincide with the edge of the coverage area; or, part of the edge of the pixel area coincides with the edge of the coverage area, and at the same time, other edges of the pixel area exceed the coverage area. or, all the edges of the pixel area do not coincide with the edges of the coverage area, and at the same time, all the edges of the pixel area exceed the edges of the coverage area. That is to say, in the projection of the transparent cover plate 5 to the display panel 6, the edge contour of the transparent cover plate 5 is all within the edge contour of the pixel area in the display panel 6, and the coverage area is located within the pixel area.

In the embodiment of the present application, the size of the edge of the pixel area in the display panel 6 beyond the edge of the coverage area of the transparent cover plate 5 can be determined according to the lamination accuracy and the cutting accuracy of the transparent cover plate 5 and the display panel 6, so that the transparent cover plate can be The coverage area of 5 only needs to be within the pixel area of the display panel 6 even at extreme tolerances.

A curved wiring board 11 is mounted on one end of the display panel 6 , and the curved wiring board 11 has a curved wiring board structure. One end of the curved circuit board 11 is connected to the display panel 6 , and the other end of the curved circuit board 11 is bent and extended to the bottom of the panel body, that is, the other side of the display panel 6 , that is, the rear area of the display panel 6 . With such a design, the curved characteristic of the display panel 6 can be utilized to reasonably facilitate the space occupied by the display panel 6 and help reduce the occupied volume of the display module. The driving chip 7 and the flexible circuit board 12 are arranged on the curved circuit board 11 . The flexible circuit board 12 is used to electrically connect devices that need to be connected to the display module.

The driving chip 7 is a control device for controlling the display of the display panel 6 , and includes a register. The register stores the pixel coordinates of the display panel 6 , and the pixel coordinates are in a mapping relationship with the pixels in the pixel area. The driving chip 7 controls the display content of the display panel 6 based on the coordinates of the pixel points in the register, so that the display range of the display panel 6 is the range of the pixel area. In this embodiment, the driving chip 7 controls the operation of some pixels in the pixel area to align the display area of the pixel area with the coverage area of the transparent cover plate 5 , so as to achieve a borderless display effect.

According to the above description, by using the display module in the embodiment of the present application, the coverage area of the transparent cover plate 5 is located within the pixel area of the display panel 6, that is, the pixel area of the display panel 6 is larger than the coverage area of the transparent cover plate 5, so that The covered area of the transparent cover plate 5 is all the pixels that can be displayed in the display panel 6, and the non-display area in the display panel 6 is located outside the coverage area after exceeding the coverage area, no printing ink is needed to cover, and there is no ink border, Therefore, a borderless display effect of the display module can be achieved.

The edge end surface of the transparent cover plate 5 is provided with a light shielding portion 8 , and the light shielding portion 8 is a black tape attached to the edge end surface of the transparent cover plate 5 . By arranging the black tape, the edge light leakage of the transparent cover 5 after the display panel 6 is lit can be prevented, and the display effect of the display module can be improved. In a possible implementation manner, the light-shielding portion 8 may also be black ink coated on the edge end face of the transparent cover plate 5 .

A polarizer 10 (Polarizer, referred to as POL) and an optical glue (Optically Clear Adhesive, referred to as OCL) are also arranged between the transparent cover plate 5 and the display panel 6. The POL 10 is attached to the outside of the display panel 6 to block the reflection of external light, so as to prevent the reflection of external light from being reflected. Make sure the display module maintains a high contrast ratio. OCA is a layer of special non-substrate double-sided tape with optical transparency. The POL10 and the transparent cover plate 5 are bonded through OCL, and the OCL forms an optical adhesive layer 9 between the transparent cover plate 5 and the POL10.

The above embodiments are described by taking a curved screen and a 3D cover plate as examples, but the embodiments of the present application are not limited thereto. In a possible implementation manner, the transparent cover plate 5 and the display panel 6 are flat plate-like structures.

The embodiment of the present application also provides a display device, and the display device may be an electronic device with a display function, such as a mobile phone, a notebook, a display, a smart TV, and a smart watch. The display device includes an installation casing and a display module disposed in the installation casing, and the display module adopts the design in the above embodiment.

When the edge of the pixel area of the display panel 6 is at least coincident with the edge of the covered area of the transparent cover 5, the edge end of the display panel 6 may exceed the edge of the transparent cover 5 by a certain distance, that is, relative to the edge of the transparent cover 5, The edge end face of the display panel 6 may be convex, and the convex part is defined as the convex end. In view of this, the mounting housing is provided with an escape space corresponding to the convex end of the display panel 6 in the display module. It can be understood that, the smaller the distance of the display panel 6 beyond the transparent cover 5 is, the smaller the avoidance space can be.

The embodiment of the present application also provides a method for calibrating a display module, and the method for calibrating the display module is used for the control of the display module in the above-mentioned embodiment. A flowchart of a calibration method; FIG. 7 is a schematic diagram of a calibration method for a display module provided by an embodiment of the present application. As shown in FIGS. 6 and 7 , the display device control method includes the following steps:

Step S1: driving the display panel to display the calibration point;

The driver chip of the display module has a register, and the register stores the coordinates of the pixel points in the pixel area, and the coordinates of the pixel points are in a mapping relationship with the pixel points in the pixel area. The driver chip controls the display content of the display panel 6 based on the pixel coordinates in the register. In the initial state, the pixel coordinates in the register are based on the outline of the pixel area, and the display range of the display panel 6 is the range of the pixel area. However, due to the fitting tolerance of the transparent cover 5 and the display panel 6 during assembly, and the processing tolerance of the outline of the transparent cover 5 during molding, the pixel area and the transparent cover 5 may not be directly aligned, that is, In other words, there may be some misalignment between the pixel area and the transparent cover 5, which causes the display content of the display panel 6 to be misaligned with respect to the transparent cover 5. Therefore, it is necessary to calibrate and compensate the pixel coordinates in the register to ensure that the transparent cover 5 Accurate display effect.

In the process of calibrating and compensating the coordinates of the pixel points in the register, it is necessary to first define a point of the display panel 6 as the calibration point 13. The calibration point 13 can be one or multiple. When the calibration point 13 is one, it is usually selected The center point, when there are multiple calibration points 13, can be selected as equal points. For example, in this embodiment, the calibration point 13 is the center point of the pixel area, which is represented by a black square. At this time, the generation of the calibration point 13 is based on the outline of the pixel area.

The display panel 6 is turned on, and the display panel 6 is controlled to display the calibration point 13 .

Step S2: obtaining the outline of the transparent cover, and the first coordinate value of the calibration point relative to the first coordinate system;

In the process of correcting and compensating the coordinates of the pixel points in the register, the actual outline of the transparent cover plate 5 and the position of the calibration point 13 relative to the transparent cover plate 5 need to be obtained. The above data can be obtained by image processing.

For example, in this embodiment, the outline of the transparent cover 5 is photographed by a CCD (Charge-coupled Device, charge-coupled device), and then the image is processed to obtain the outline of the transparent cover 5. The transparent cover 5 5 , and the first coordinate value of the calibration point 13 in the first coordinate system with the outline of the transparent cover 5 as a reference.

Step S4: calculating the second coordinate value of the reference point in the transparent cover plate relative to the first coordinate system;

After obtaining the relevant information such as the outline of the transparent cover plate 5, the second coordinate value of the reference point corresponding to the calibration point 13 can be obtained. The reference point is the point corresponding to the calibration point 13. For example, when the calibration point 13 is a pixel area When the center point of , the reference point is the center point of the transparent cover plate 5, and the center point of the transparent cover plate 5 is the center point of the outline. Therefore, after obtaining the relevant information of the outline, the second reference point can be calculated. Coordinate value.

Step S5: calculating the coordinate deviation value of the first coordinate value relative to the second coordinate value;

When the pixel area of the display panel 6 and the transparent cover 5 cannot be directly aligned, the reference point and the calibration point 13 cannot be coincident, that is, there is a certain deviation. By calculating the coordinate deviation value of the first coordinate value relative to the second coordinate value, it can be determined whether the calibration point 13 deviates from the reference point and the degree of deviation.

Step S6: Compensate the pixel point coordinates of the register in the driver chip according to the coordinate deviation value.

The coordinate deviation value obtained in step S5 indicates the degree of deviation of the pixel area relative to the transparent cover. This coordinate deviation value is compensated to the original pixel coordinates in the register, and the pixel coordinates in the register are updated to the compensated ones. Pixel point coordinates, the driver chip drives the display panel 6 to display based on the new pixel point coordinates, which can make the calibration point 13 and the reference point align and coincide, and can also make the display content of the display panel 6 and the transparent cover to maintain the correct position and angle , to ensure accurate display effect.

In a possible implementation manner, after acquiring the outline and length and width data of the transparent cover 5 , the driver chip can control only the pixels within the outline of the transparent cover 5 to work, that is, the effective operation of the display panel 6 The display area is limited to the coverage area of the transparent cover plate 5, so as to achieve a borderless effect.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by "" etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, a specific orientation, and a specific orientation. The configuration and operation of the orientation should not be construed as a limitation on this application. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a Removable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application in specific situations.

In addition, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as there is no conflict with each other.

So far, the technical solutions of the present application have been described with reference to the preferred embodiments shown in the accompanying drawings, however, those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. On the premise of not departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims (10)

1. The utility model provides a display module assembly which characterized in that: the display panel is provided with a pixel area consisting of pixel points; the transparent cover plate is arranged on the outer side of the display panel along the display direction of the pixel area; in the projection of the pixel area to the transparent cover plate along the display direction, the edge of the pixel area at least coincides with the edge of the coverage area of the transparent cover plate.

2. The display module according to claim 1, wherein: the transparent cover plate and the display panel are of curved surface structures matched with each other.

3. The display module according to claim 2, wherein: the transparent cover plate comprises a cover plate body and a cover plate edge, one end of the cover plate edge is connected to the side edge of the cover plate body, and the other end of the cover plate edge extends towards one side of the display panel in a bending mode; the display panel is a flexible panel attached to the inner side of the transparent cover plate.

4. The display module according to claim 3, wherein: the display module assembly further comprises a bent circuit board, one end of the bent circuit board is connected with the end of the display panel, the other side of the bent circuit board is bent and extends to one side, away from the transparent cover plate, of the display panel, and the bent circuit board is provided with a driving chip for controlling the display of the display panel.

5. The display module according to claim 3, wherein: the display panel is a flexible OLED panel or a flexible liquid crystal panel.

6. The display module according to any one of claims 1-5, wherein: and the edge end face of the transparent cover plate is provided with a shading part for preventing light leakage.

7. The display module according to claim 6, wherein: the shading part is a black adhesive tape attached to the edge end face.

8. The display module according to any one of claims 1-5, wherein: the display panel is characterized in that a polaroid is arranged between the display panel and the transparent cover plate, the polaroid is attached to the outer side of the display panel, and the transparent cover plate is glued to the outer side of the polaroid through optical cement.

9. A display device, characterized in that: the display module comprises a mounting shell and the display module as claimed in any one of claims 1 to 8 mounted on the mounting shell, wherein the mounting shell is provided with an avoiding space for avoiding the convex end part of the display panel.

10. A calibration method of a display module is applied to the display module of any one of claims 1 to 7, wherein the display module comprises a driving chip for controlling the display of the display panel;

it is characterized by comprising:

driving the display panel to display the calibration points;

acquiring the outline of the transparent cover plate and a first coordinate value of the calibration point relative to a first coordinate system, wherein the first coordinate system is a coordinate system taking the outline as a reference;

calculating a second coordinate value of the reference point in the transparent cover plate relative to the first coordinate system;

calculating a coordinate deviation value of the first coordinate value relative to the second coordinate value;

and compensating the pixel point coordinates of a register in the driving chip according to the coordinate deviation value.

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