CN111816073B - 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 equipment and are used to improve the problem that the display effect of the display module is affected by the ink border on the glass cover. The display module includes a display panel and a transparent cover, the display panel has a pixel area composed of pixels; along the display direction of the pixel area, the transparent cover is arranged outside the display panel; In the projection of the pixel area to the transparent cover along the display direction, the edge of the pixel area at least coincides with the edge of the covered area of the transparent cover.

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 generally be 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 the content.

The related art provides a display module, the display module includes a display panel and a glass cover plate, the glass cover plate is attached to the outside of the display panel, and the glass cover plate is attached to the display panel to achieve a certain protection effect on the display panel . As shown in FIG. 1 , the display panel includes a display area 1 and a non-display area 2 . The display area 1 is provided with a plurality of pixels, and the plurality of pixels work 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 Figure 2, the glass cover is printed with ink corresponding to the non-display area 2 of the display panel, and 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 cover the non-display area 2 of the display panel, making the display module more beautiful.

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

Contents of the invention

In view of this, the embodiment of the present application proposes a display module, a display device, and a calibration method of the display module, which are used to improve the problem in the related art that the display effect of the display module is affected by the ink border on the glass cover.

Based on the above purpose, in the first aspect, the embodiment of the present application provides a display module, including a display panel and a transparent cover, the display panel has a pixel area composed of pixels; along the display direction of the pixel area, the The transparent cover is arranged on the outside of the display panel; in the projection of the pixel area to the transparent cover along the display direction, the edge of the pixel area is at least the same as the edge of the covered area of the transparent cover coincide.

In the display module with the above structure, the edge of the pixel area at least coincides with the edge of the covered area of the transparent cover, that is, the covered area is located in the pixel area, that is, the pixel area of the display panel is larger than the covered area of the transparent cover, The covered area of the transparent cover is all pixels that can be displayed in the display panel, and the non-display area in the display panel is located outside the covered area after exceeding the covered area, without printing ink blocking, and there is no ink frame, so it can Realize the borderless display effect of the display module.

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

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

In a possible implementation manner, the display module further includes a curved circuit board, one end of the curved circuit board is connected to the end of the display panel, and the other side of the curved circuit board is bent and extended to the The side of the display panel away from the transparent cover plate, the curved circuit board is provided with a driving chip for controlling the display of the display panel. The curved circuit board with the above structure can make full use of the space occupied by the curved display panel, which is beneficial to the reduction of the volume of the display module.

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 surface of the transparent cover is provided with a light shielding portion to prevent light leakage. By providing the light-shielding part, light leakage at the edge 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 part is a black adhesive tape attached to the end surface of the edge.

In a possible implementation manner, a polarizer is arranged between the display panel and the transparent cover, the polarizer is attached to the outside of the display panel, and the transparent cover is glued to the transparent cover by optical glue. outside of the polarizer.

In the second aspect, the embodiment of the present application provides a display device, including a mounting case and a display module installed on the mounting case as described in the embodiment of the first aspect. The escape space at the convex end of the panel.

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

In a third aspect, an embodiment of the present application provides a display module calibration method, 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 points;

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

calculating a second coordinate value of a 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 point coordinates of the register 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 display panel and the transparent cover, and ensuring the display The borderless display effect of the mod.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is one or more embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

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

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

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

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

Figure 5 is a partially enlarged view of Figure 4;

FIG. 6 is a flow chart of a calibration method for a display module provided in 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.

Explanation of reference signs:

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-curved circuit board, 12-flexible circuit board,

13 - Calibration points.

Detailed ways

The display module in the related art includes a display panel and a glass cover. 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 makes 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, an embodiment of the present application provides a display module. In the display module, the covered area of the transparent cover is located in the pixel area, so that the covered area of the transparent cover is all pixels that can be displayed in the display panel. Dots, so that the non-display area in the display panel is located outside the covered area after exceeding the covered area, without printing ink covering, and there is no ink frame, so the display effect of the display module without a frame can be realized.

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 clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

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

Wherein, 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 taken 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 a backlight layer and a liquid crystal layer, so that the display panel 6 can be thinner and thinner. Bending is easier to achieve.

The display panel 6 includes a panel body and a panel edge. The panel body is a rectangular plate-shaped structure, and four side positions of the rectangular plate-shaped structure are connected with 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 bends toward one side of the panel body, thereby forming a curved screen structure. The curved extension direction of the panel edge is usually away from the display direction of the panel body. Here, the display direction refers to the direction in which the display content faces when the display panel 6 is turned on. When in use, the viewer is located in front of the display orientation. 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 surface structure. In this embodiment, the display panel 6 is a flexible OLED panel, and the panel body and panel edges are formed after bonding with the transparent cover 5 , that is, the display panel 6 bends under the restriction of the transparent cover 5 .

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

The transparent cover 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. The transparent cover 5 can be made of glass, such as tempered glass. In a possible implementation manner, the transparent cover 5 may also use other transparent materials, such as acrylic.

The transparent cover 5 is a curved surface structure matched with the display panel 6, which includes a cover body and a cover edge. The cover body is a rectangular plate-shaped structure, and the four side positions of the rectangular plate-shaped structure are connected with the cover edge. One end of the edge of the cover plate is connected to the edge of the cover body, and the other end of the edge of the cover plate bends toward the side where the panel body is located, thereby forming a 3D cover plate. The 3D cover plate restricts the bending deformation of the flexible OLED panel through the inner surface. When the curved extension direction of the panel edge deviates from the display direction of the panel body, the extension direction of the cover plate edge also deviates 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 projection of the transparent cover plate 5 along the display direction in the pixel area In this case, the edge of the pixel area at least coincides with the edge of the area covered by the transparent cover 5 . At least overlapping here means that among the edges of the pixel area, all the edges of the pixel area coincide with the edges of the coverage area; or, part of the edges of the pixel area coincide with the edges of the coverage area, and at the same time, the other edges of the pixel area exceed the coverage area or, all the edges of the pixel area do not overlap 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 5 to the display panel 6 , the edge contours of the transparent cover 5 are all within the edge contours of the pixel areas in the display panel 6 , and the covered areas are located within the pixel areas.

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 area covered by the transparent cover 5 can be determined according to the lamination accuracy and cutting accuracy of the transparent cover 5 and the display panel 6, and the transparent cover can be made It is sufficient that the coverage area of 5 is within the pixel area of the display panel 6 even in extreme tolerances.

A curved circuit board 11 is mounted on one end of the display panel 6 , and the curved circuit board 11 is a curved circuit 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 bends and extends to the bottom of the panel body, that is, the other side of the display panel 6 , that is, the area behind the display panel 6 . Such a design can take advantage of the curved characteristic of the display panel 6 , reasonably benefiting the space occupied by the display panel 6 and reducing the occupied volume of the display module. A drive chip 7 and a 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 with the display module.

The driver chip 7 is a control device for controlling the display of the display panel 6, and includes a register, which stores pixel coordinates of the display panel 6, and the pixel coordinates are in a mapping relationship with the pixel points in the pixel area. The driver chip 7 controls the display content of the display panel 6 based on the coordinates of the pixels 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 so that the display area of the pixel area is aligned with the covered area of the transparent cover 5 , thereby achieving 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 5 is located in 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 5, so that In the coverage area of the transparent cover plate 5 are all pixels that can be displayed in the display panel 6, and the non-display area in the display panel 6 exceeds the coverage area and is located outside the coverage area, without printing ink blocking, and there is no ink frame. Therefore, the frameless display effect of the display module can be realized.

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 adhesive tape, it can prevent edge light leakage of the transparent cover plate 5 after the display panel 6 is lit, and improve the display effect of the display module. In a possible implementation manner, the light-shielding portion 8 may also be black ink coated on the edge surface of the transparent cover plate 5 .

A polarizer 10 (Polarizer, POL for short) and Optically Clear Adhesive (OCL for short) are also provided between the transparent cover 5 and the display panel 6, and the POL 10 is attached to the outside of the display panel 6 to block the reflection of external light, so as to Make sure the display module maintains a high contrast ratio. OCA is an optically transparent layer of special double-sided adhesive without a substrate. The bonding between POL10 and transparent cover 5 is realized through OCL, and OCL forms an optical adhesive layer 9 between transparent cover 5 and POL10.

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

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

When the edge of the pixel area of the display panel 6 at least coincides with the edge of the area covered by the transparent cover 5, the edge end surface of the display panel 6 may exceed the edge end surface of the transparent cover 5 by a certain distance, that is, relative to the edge end surface of the transparent cover 5, The edge end surface of the display panel 6 may be convex, and the convex part is defined as a convex end. In view of this, the installation 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 between the display panel 6 and the transparent cover 5 , the smaller the avoidance space is correspondingly.

The embodiment of the present application also provides a display module calibration method, the display module calibration method is used for the control of the display module in the above embodiment, Figure 6 is a display module provided in the embodiment of the present application Flowchart of the calibration method; FIG. 7 is a schematic diagram of a calibration method for a display module provided in 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 points;

The driver chip of the display module has registers, and the registers store pixel coordinates in the pixel area, and the pixel coordinates 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 point coordinates in the register. In the initial state, the pixel point 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 lamination tolerances in the assembly of the transparent cover 5 and the display panel 6, and processing tolerances in the outline of the transparent cover 5 during molding, the pixel area may not be directly opposite to the transparent cover 5, that is, That is to say, there may be a certain misalignment between the pixel area and the transparent cover 5, which will cause the display content of the display panel 6 to be misaligned relative to the transparent cover 5. Therefore, it is necessary to correct and compensate the coordinates of the pixels in the register to ensure that the transparent cover 5 Accurate display effect.

In the process of correcting and compensating the coordinates of the pixels in the register, it is necessary to define a point on the display panel 6 as the calibration point 13. There can be one or more calibration points. When there is one calibration point 13, it is usually selected As for the central point, when there are multiple calibration points 13, equal division points can be selected. For example, in this embodiment, the calibration point 13 is the center point of the pixel area, represented by a black square. At this time, the generation of the calibration point 13 is based on the contour of the pixel area as a reference.

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

Step S2: Obtain 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 pixels in the register, it is also necessary to obtain the actual outline of the transparent cover 5 and the position of the calibration point 13 relative to the transparent cover 5. The above data can be obtained through image processing.

For example, in the present embodiment, the outline of the transparent cover 5 is photographed by a CCD (Charge-coupled Device, charge-coupled device), and then image processing obtains the outline of the transparent cover 5, the transparent cover 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 relative to the first coordinate system;

After obtaining 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 a 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, 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 point of the reference point can be obtained by calculation. 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 cannot face the transparent cover 5 , the reference point and the calibration point 13 cannot overlap, 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, the 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 Pixel coordinates, the driver chip drives the display panel 6 to display based on the new pixel coordinates, so that the calibration point 13 can be aligned with the reference point, and the display content of the display panel 6 can also be maintained at the correct position and angle on the transparent cover , to ensure accurate display effect.

In a possible implementation, after acquiring the outline and length and width data of the transparent cover 5, the drive chip can control only the pixels within the outline of the transparent cover 5 to work, that is, the effective function of the display panel 6. The display area is limited to the coverage area of the transparent cover plate 5, thereby achieving the effect of no frame.

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 ” and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific configuration and operation, and therefore should not be construed as limiting the application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the embodiments of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a A detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it may be an 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 may be combined as long as they do not constitute conflicts with each other.

So far, the technical solutions of the present application have been described in conjunction with 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. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present application.

Claims (9)

1. A display module, characterized in that: it includes a display panel and a transparent cover, the display panel has a pixel area composed of pixels; along the display direction of the pixel area, the transparent cover is arranged on the The outside of the display panel; in the projection of the pixel area to the transparent cover along the display direction, the edge of the pixel area at least coincides with the edge of the covered area of the transparent cover; the transparent cover The edge contours are all within the edge contours of the pixel area, and the coverage area of the transparent cover is located within the pixel area; It also includes a driver chip, the driver chip includes a register, the pixel coordinate point of the display panel is stored in the register, the pixel coordinate point is in a mapping relationship with the pixel point in the pixel area, and the driver chip uses the pixel coordinate point Control the display content of the display panel based on the coordinate points, so as to realize the alignment of the pixel area with the coverage area of the transparent cover; wherein, the driver chip controls the display content of the display panel based on the pixel coordinate points The displayed content includes: the driver chip determines the calibration point, the outline of the transparent cover, and the first coordinate value of the calibration point relative to the first coordinate system with the outline as a reference system, and calculates the transparent cover. The second coordinate value of the reference point in the cover plate relative to the first coordinate system; calculate the coordinate deviation value of the first coordinate value relative to the second coordinate value; register in the drive chip according to the coordinate deviation value Proofreading and compensation of pixel coordinates. 2 . The display module according to claim 1 , wherein the transparent cover and the display panel are curved structures that cooperate with each other. 3 . 3. The display module according to claim 2, wherein the transparent cover comprises a cover body and a cover edge, and one end of the cover edge is connected to a side of the cover body, so that The other end of the edge of the cover plate bends and extends toward the side where the display panel is located; 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 further comprises a curved circuit board, one end of the curved circuit board is connected to the end of the display panel, and the curved circuit board The other side of the circuit board bends and extends to the side of the display panel away from the transparent cover, and the curved 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 a light-shielding portion for preventing light leakage is provided on an edge surface of the transparent cover plate. 7. The display module according to claim 6, wherein the light-shielding portion is a black adhesive tape attached to the edge surface. 8. The display module according to any one of claims 1-5, wherein a polarizer is arranged between the display panel and the transparent cover, and the polarizer is attached to the display On the outside of the panel, the transparent cover is bonded to the outside of the polarizer by optical glue. 9. A display device, characterized in that it comprises an installation housing and a display module installed on the installation housing as claimed in any one of claims 1 to 8, and the installation housing has a structure that avoids the display panel. The escape space at the convex end.

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