CN116203749A - Display module and display device - Google Patents

Abstract

The invention discloses a display module and a display device, wherein the display module comprises a display area and a non-display area surrounding the display area, the display module comprises a first display panel and a second display panel, and the first display panel is positioned at one side close to a light emitting surface of the display module; the first display panel comprises a first light-transmitting area and a first frame, the second display panel comprises a second light-transmitting area and a second frame, and the display area is an area where the first light-transmitting area and the second light-transmitting area overlap in the direction perpendicular to the light-emitting surface of the display module; the first driving unit is bound in the second frame of the second display panel, and the first heat affected zone is positioned on one side, close to the display area, of the first driving unit along the first direction, and surrounds the first driving unit; in the direction perpendicular to the light-emitting surface of the display module, the first heat affected zone is located in the non-display zone. The invention improves uneven brightness caused by directly binding the driving chip on the substrate, and improves brightness uniformity of the display module under the black state.

Description

Display module and display device

technical field

The present invention relates to the field of display technology, and more specifically, to a display module and a display device.

Background technique

With the development of electronic technology, the manufacture of display panels is becoming more and more mature. The display panels provided by the prior art include liquid crystal display panels, organic light-emitting display panels, plasma display panels, and the like.

Liquid crystal display panels have the advantages of thinness, low power consumption, and low radiation, and are widely used in various fields such as consumer electronics, automobiles, rail transit, and aviation defense. A liquid crystal display panel usually includes a color filter substrate and an array substrate oppositely arranged, and a liquid crystal layer between the color filter substrate and the array substrate. The side of the color filter substrate close to the array substrate is provided with a black matrix and a color resist layer. The electric field between the electrode and the common electrode can deflect the liquid crystal molecules. After the liquid crystal molecules are deflected, the light generated by the backlight assembly will pass through the display panel. By adjusting the size of the electric field, the liquid crystal molecules can be deflected to different degrees, and the liquid crystal molecules When the degree of deflection is different, the light transmittance of the display panel is different, and the amount of light transmitted by the backlight assembly through the liquid crystal display panel is different, thereby realizing image display. Of course, the requirements for customer experience are increasing, including the special needs of special applications, which put forward higher requirements for display quality. For example, dual-screen display modules have appeared to improve contrast.

The problem of Mura (various creases caused by uneven brightness of the display) in display quality has been paid more and more attention. Among them, uneven display in black state, that is, low gray scale, is a manifestation of Mura, especially in dual-screen display modules. more serious. For the problem of uneven black state display, from the development of commercial and vehicle-mounted display terminals, we have focused on the development of civil aviation and defense display fields. The requirement for display uniformity in black state is very important to users. Because the vehicle-mounted display requires the same brightness of the black background when displaying map information; similarly, the display in the aviation cockpit has more stringent requirements for the brightness of the black background, mainly because the airborne display works in a low gray-scale state most of the time. If the information such as aircraft attitude and speed is displayed unevenly, the pilot will not be able to judge accurately.

Therefore, there is an urgent need to provide a display module and a display device capable of improving the display uniformity of the display module in the black state.

Contents of the invention

In view of this, the present invention provides a display module and a display device, which are used to improve the brightness uniformity of the display module in a black state.

In one aspect, the present invention provides a display module. The display module includes a display area and a non-display area surrounding the display area. The display module includes a first display panel and a second display panel that are oppositely arranged. , the first display panel is located on a side of the second display panel close to the light-emitting surface of the display module;

The first display panel includes a first light transmission area and a first frame surrounding the first light transmission area, and the second display panel includes a second light transmission area and a second frame surrounding the second light transmission area. In the frame, in a direction perpendicular to the light-emitting surface of the display module, the display area is an area where the first light-transmissive area and the second light-transmissive area overlap;

A first drive unit is bound to the second frame of the second display panel, and a first heat-affected zone located on a side of the first drive unit close to the display area along the first direction, and the first drive unit A heat-affected zone surrounds the first driving unit; wherein, the first direction is parallel to the plane where the second display panel is located;

In a direction perpendicular to the light-emitting surface of the display module, the first heat-affected zone is located in the non-display zone.

On the other hand, the present invention also provides a display device, which includes the above-mentioned display module, and further includes a backlight module located on the side of the display module away from the light-emitting surface of the display module.

Compared with the prior art, the display module and the display device provided by the present invention at least achieve the following beneficial effects:

The display module of the present invention is a dual-screen display module, including a first display panel and a second display panel oppositely arranged, the first display panel is located on the side of the second display panel close to the light-emitting surface of the display module, and the first display panel The second display panel includes a first light-transmitting area and a first frame surrounding the first light-transmitting area, and the second display panel includes a second light-transmitting area and a second frame surrounding the second light-transmitting area. Above, the display area is the overlapping area of the first light transmission area and the second light transmission area, the display module includes a display area and a non-display area surrounding the display area, and the second frame of the second display panel is bound with the first The drive unit, and the first heat-affected zone located on the side of the first drive unit close to the display area along the first direction, and the first heat-affected zone surrounds the first drive unit. direction, the first heat-affected zone is located in the non-display zone, even if there is a temperature difference when binding the first drive unit, stress birefringence will occur when the light passes through the first heat-affected zone, and the brightness of the first heat-affected zone will increase Higher, but because the first heat-affected zone is in the non-display area of the display module, it will not appear in the display area of the display module. In the black state, there will be no problem of uneven brightness in the display area, which improves the display The brightness uniformity of the black state of the module.

Of course, any product implementing the present invention does not necessarily need to achieve all the above-mentioned technical effects at the same time.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of a planar structure of a display module provided by the related art;

Fig. 2 is a kind of sectional view of A-A ' direction in Fig. 1;

Fig. 3 is a schematic plan view of a display module provided by the present invention;

Fig. 4 is an exploded view of the display module in Fig. 3;

Fig. 5 is a kind of sectional view of B-B ' among Fig. 3;

6 is a schematic plan view of another display module provided by the present invention;

Fig. 7 is an exploded schematic view of the display module in Fig. 6;

Fig. 8 is a kind of sectional view of C-C ' among Fig. 6;

Fig. 9 is a schematic plan view of another display module provided by the present invention;

Fig. 10 is an exploded schematic view of the display module in Fig. 9;

Fig. 11 is a kind of sectional view of D-D ' among Fig. 9;

Fig. 12 is a kind of sectional view of E-E ' among Fig. 9;

Fig. 13 is a schematic plan view of another display module provided by the present invention;

Fig. 14 is an exploded schematic view of the display module in Fig. 13;

Fig. 15 is a kind of sectional view of F-F ' among Fig. 13;

Fig. 16 is a schematic plan view of another display module provided by the present invention;

Fig. 17 is an exploded schematic diagram of the display module in Fig. 16;

Fig. 18 is another exploded schematic view of the display module in Fig. 16;

Fig. 19 is a schematic plan view of a display device provided by the present invention;

Fig. 20 is a cross-sectional view of G-G' direction in Fig. 19.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have different values.

It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

In view of the black state, that is, the problem of uneven display at low gray scales in related technologies, especially in dual-screen display modules, the inventor has conducted the following research on related technologies, referring to Figure 1 and Figure 2, Figure 1 is A schematic diagram of a planar structure of a display module provided in the related art. FIG. 2 is a cross-sectional view taken along the direction AA' in FIG. 1. The display module 000 in FIG. 1 includes a display area AA and non- In the display area BB, the display module 000 in FIG. 2 includes a laminated first display screen 01 and a second display screen 02. The first display screen 01 is a color display screen. The first display screen 01 also includes an array layer 011 and a color filter layer. 012, pixel electrodes 013, common electrodes 014, and liquid crystal molecules 015, the second display screen 02 is a black and white display screen, and the second display screen 02 also includes an array layer 021, pixel electrodes 022, common electrodes 023, and liquid crystal molecules 024, the second display screen 02 A display screen 01 is located on the side of the second display screen 02 close to the light emitting surface of the display module 000, the first substrate 03 of the first display screen 01 is bound with the first drive unit 04, and the second substrate of the second display screen 02 The second drive unit 06 is bonded to the bottom 05, and the process of bonding the drive chip is a high-temperature process, so when the second drive unit 06 is bound, a second heat-affected zone 08 will be generated, corresponding to the second heat-affected zone 08, the second The upper and lower surfaces of the second substrate 05 also have a temperature difference. The thermal stress causes stress birefringence at the position of the second heat-affected zone 08, and the optical path difference changes. When displaying, the brightness at the position of the second heat-affected zone 08 is too high, resulting in COG (Chip On Glass IC, the chip is directly bound on the LCD screen) Mura (various creases caused by uneven brightness of the display), which affects the brightness uniformity of the black state; also when binding the first drive unit 04 The first heat-affected zone 07 is generated, corresponding to the first heat-affected zone 07, the upper and lower surfaces of the first substrate 03 will have a temperature difference, thermal stress will cause stress birefringence at the position of the first heat-affected zone 07, and the optical path difference will change. When displaying, the brightness of the position of the first heat-affected zone 07 is too high, resulting in COG Mura, which affects the uniformity of black state brightness; thus, double-layer panel superposition will generate two COG Mura, and the uniformity of black state brightness is even worse.

In view of this, the present invention provides a display module and a display device to improve the problem of poor black brightness uniformity. The specific embodiments of the display module and the display device will be described in detail below.

Referring to Figure 3, Figure 4 and Figure 5, Figure 3 is a schematic plan view of a display module provided by the present invention, Figure 4 is an exploded view of the display module in Figure 3, and Figure 5 is BB' in Figure 3 A cutaway view. The display module 100 of this embodiment includes a display area AA and a non-display area BB surrounding the display area AA. The display module 100 includes a first display panel 10 and a second display panel 20 that are oppositely arranged. The first display panel 10 is located at the second The side of the display panel 20 close to the light-emitting surface K1 of the display module 100;

The first display panel 10 includes a first light transmission area 30 and a first frame 40 surrounding the first light transmission area 30 , and the second display panel 20 includes a second light transmission area 50 and a second frame surrounding the second light transmission area 50 60. In the direction Z perpendicular to the light-emitting surface K1 of the display module 100, the display area AA is an area where the first light-transmissive area 30 and the second light-transmissive area 50 overlap;

A first drive unit 70 is bound to the second frame 60 of the second display panel 20, and a first heat-affected zone 2001 located on the side of the first drive unit 70 close to the display area AA along the first direction X, and the first The heat-affected zone 2001 surrounds the first driving unit 70; wherein, the first direction X is parallel to the plane where the second display panel 20 is located;

In the direction Z perpendicular to the light emitting surface K1 of the display module 100 , the first heat-affected zone 2001 is located in the non-display area BB.

Specifically, the display module 100 includes a display area AA and a non-display area BB surrounding the display area AA. Of course, the non-display area BB partially surrounds the display area AA, such as a water drop screen, which is not specifically limited here.

The display module 100 includes a first display panel 10 and a second display panel 20 that are arranged oppositely. The first display panel 10 is located on the side of the second display panel 20 close to the light-emitting surface K1 of the display module 100. The display module 100 of the present invention It is a dual-screen display module 100. Optionally, the first display panel 10 is a color display panel, and the second display panel 20 is a black and white display panel. Adding the second display panel 20 can be used to improve the contrast of the display module 100. Optionally, in the bright state, the first display panel 10 and the second display panel 20 are in the maximum transmittance state at the same time, and in the black state, the first display panel 10 and the second display panel 20 are in the minimum transmittance state at the same time , the contrast of the final display module 100 is the product of the contrast of the first display panel 10 and the contrast of the second display panel 20, for example, the white state transmittance of the first display panel 10 is 6%, and the black state transmittance is 0.006%, so the contrast ratio of the first display panel 10=6%: 0.006%=1000:1, and the white state transmittance of the second display panel 20 is 90%, and the black state transmittance is 5%, so the second display panel 20 The contrast ratio of the display panel 20=90%:5%=18:1, then the final contrast ratio of the display module 100 is that the product of the contrast ratio of the first display panel 10 and the contrast ratio of the second display panel 20 is equal to 18000:1, compared to When only the first display panel 10 is provided, the contrast ratio is increased by 18 times, so that the contrast ratio of the display module 100 can be significantly improved by reducing the black state transmittance.

It should be noted that, on the side of the second display panel 20 far away from the first display panel 10, a backlight module (not shown in the figure) needs to be provided. The backlight module provides backlight, and the backlight light passes through the second display panel 20 and the The first display panel 10. In the present invention, in the direction Z perpendicular to the light-emitting surface K1 of the display module 100, the display area AA is the area where the first light-transmitting region 30 and the second light-transmitting region 50 overlap, and in the direction Z perpendicular to the light-emitting surface K1 of the display module 100 The overlapping area of the first frame 40 and the second light-transmissive area 50 in the direction Z is the non-display area BB, because the light will be blocked by the first frame 40 of the first display panel 10 after passing through the second light-transmissive area 50, so it is non-display area BB. Display area BB; at the same time, the area where the second frame 60 overlaps the first light-transmissive area 30 in the direction Z perpendicular to the light-emitting surface K1 of the display module 100 is also a non-display area BB, and the light will be blocked by the second frame 60 It cannot enter into the first light-passing area 30, so it is a non-display area BB. Only the area where the first light-passing area 30 and the second light-passing area 50 overlap in the direction Z perpendicular to the light-emitting surface K1 of the display module 100 is the display area AA of the display module 100, and the light can pass through the second light-passing area in sequence. The light zone 50 and the first light pass zone 30.

Optionally, referring to FIG. 5, it is shown in FIG. 5 that the first display panel 10 includes a first base substrate 101 and a second base substrate 102. In FIG. 5, the first base substrate 101 and the second substrate are not The substrate 102 is pattern-filled. Optionally, the first base substrate 101 and the second base substrate 102 can be made of glass material, and of course it can also be PI (polyimide). The second base substrate 102 is close to the first substrate. One side of the base substrate 101 includes a first array layer 106, the first array layer 106 includes a driving transistor (not shown in the figure), and the side of the first array layer 106 close to the first base substrate 101 also includes a first electrode 103, the first electrode 103 can be a pixel electrode, and the side of the first base substrate 101 close to the second base substrate 102 includes a color filter layer 107, and of course the color filter layer 107 can include a plurality of black matrices (not shown in the figure between the black matrices is color resistance (not shown in the figure), the light is emitted as colored light after passing through the color filter layer 107, and the color filter layer 107 also includes a second electrode on the side away from the first base substrate 101 104. The second electrode 104 may be a common electrode, and the first liquid crystal molecule 105 is interposed between the second electrode 104 and the first electrode 103, and the first driving unit 70 is bound on the second base substrate 102. A driving unit 70 provides driving signals for the driving transistors in the first array layer 106, and provides common voltage signals for the second electrodes 104, and the electric field between the first electrodes 103 and the second electrodes 104 can deflect the first liquid crystal molecules 105, When the degree of deflection of the first liquid crystal molecules 105 is different, the transmittance of the first display panel 10 is different. The second display panel 20 includes a third base substrate 201 and a fourth base substrate 202. The third base substrate 201 and the fourth base substrate 202 can be glass substrates or PI. The third base substrate is not shown in FIG. 5 201 and the fourth base substrate 202 for pattern filling, the side of the fourth base substrate 202 close to the third base substrate 201 includes a second array layer 206, and the second array layer 206 also includes driving transistors (not shown in the figure ), the third electrode 203 is included on the side of the second array layer 206 close to the third base substrate 201, the third electrode 203 may be a pixel electrode, and the side of the third base substrate 201 close to the fourth base substrate 202 Including the fourth electrode 204, the fourth electrode 204 can be a common electrode, the second liquid crystal molecule 205 is between the third electrode 203 and the fourth electrode 204, and the second driving unit 80 is bound on the fourth substrate substrate 202, The second driving unit 80 provides driving signals for the driving transistors in the second array layer 206, and provides common voltage signals for the fourth electrodes 204, and the electric field between the third electrodes 203 and the fourth electrodes 204 can deflect the second liquid crystal molecules 205 When the degree of deflection of the second liquid crystal molecules 205 is different, the transmittance of the second display panel 20 is different.

Optionally, the number of the first driving unit 70 may be 1, 2, 3 or more, and the number of the first driving unit 70 may be determined according to the size of the second display panel 20 in the second direction Y, The larger the size of the second display panel 20 in the second direction Y, the more the number of the first driving units 70 may be, which is not specifically limited here. Similarly, the number of the second driving unit 80 can also be 1, 2, 3 or more, and the number of the second driving unit 80 can be determined according to the size of the first display panel 10 in the first direction X. The larger the size of the display panel 10 in the second direction Y, the more the number of the second driving units 80 may be, which is not specifically limited here. The second direction Y intersects the first direction X.

Optionally, in this embodiment, in the direction Z perpendicular to the light-emitting surface K1 of the display module 100, the first driving unit 70 and the second driving unit 80 at least partially overlap, of course the first driving unit 70 and the second driving unit The units 80 may also not overlap, which is not specifically limited here.

Optionally, in this embodiment, the width k1 of the second frame 60 in the first direction X is only schematically wider. Specifically, the width k1 of the second frame 60 in the first direction X is larger than that of the first frame 40 in the first direction X. The width k2 in the first direction X is such that the first heat-affected zone 2001 is finally located in the non-display area BB in the direction Z perpendicular to the light-emitting surface K1 of the display module 100 . In the embodiment in FIG. overlapping, and the area of the display area AA of the display module 100 is smaller than the area of the first light-transmitting area 30 of the first display panel 10, and the area of the non-display area BB of the display module 100 is also larger than that of the first display panel 10. Because the area of the second frame 60 is larger than the area of the first frame 40, the second frame 60 partially overlaps the first light-transmitting area 30 in the direction perpendicular to the light-emitting surface K1 of the display film layer. Of course, the width of the first frame 40 of the first display panel 10 in the first direction X may be greater than the width of the second frame 60 in the first direction X, then in the direction Z perpendicular to the light-emitting surface K1 of the display module 100 Above, the first frame 40 partially overlaps the second light-transmitting area 50, and the light in the first heat-affected zone 2001 will be blocked by the first frame 40, ensuring that the light in the direction Z perpendicular to the light-emitting surface K1 of the display module 100 A heat-affected zone 2001 is located in the non-display area BB, not shown here.

Optionally, a light-shielding layer 90 is coated in both the first frame 40 and the second frame 60. Optionally, referring to FIG. The light-shielding layer 90 can be manufactured in the same process as the black matrix (not shown in the figure) in the color filter layer 107, which can simplify the manufacturing process, and of course it can also be on the side of the first base substrate 101 away from the second base substrate 102 A light-shielding layer 90 (not shown in the figure) is provided; optionally, in FIG. A light-shielding layer 90 (not shown in the figure) is provided on the side of the base substrate 201 away from the fourth base substrate 202 , which is not specifically limited here.

In the present invention, in the direction Z perpendicular to the light-emitting surface K1 of the display module 100, the first heat-affected zone 2001 is located in the non-display area BB. There will be a temperature difference between the upper and lower surfaces, and the thermal stress will cause stress birefringence when the light of the backlight module (not shown in the figure) passes through the first heat-affected zone 2001, the optical path difference will change, and the brightness of the first heat-affected zone 2001 will change. Higher, the brightness of the first heat-affected zone 2001 will be greater than the brightness of other regions, causing the problem of poor brightness uniformity in the black state. In the present invention, the first heat-affected zone 2001 is located in the non-display area BB of the display module 100, and one of the In one embodiment, for example, the light in the first heat-affected zone 2001 in FIG. 5 is blocked by the light-shielding layer 90 on one side of the third base substrate 201, so that the first heat-affected zone 2001 is located in the non-display area BB of the display module 100, so that the brightness The higher first heat-affected zone 2001 will not appear in the display area AA of the display module 100. When viewing the display module from the side of the light-emitting surface K1 of the display module 100, because the first heat-affected zone 2001 is not displayed Area BB is covered, so the first heat-affected zone 2001 with higher brightness will not be observed, so the problem of uneven brightness will not occur in the display area AA in the black state, thereby improving the black state brightness of the display module 100 Uniformity.

In some optional embodiments, referring to FIG. 3 , FIG. 4 and FIG. 5 , along the second direction Y, the center of the first driving unit 70 coincides with the center of the first heat-affected zone 2001 ;

Along the second direction Y, the width of the first driving unit 70 is m1, the width of the first heat-affected zone 2001 is m2, m1≥m2;

Wherein, on the plane where the second display panel 20 is located, the second direction Y is perpendicular to the first direction X, and the second direction Y is parallel to the plane where the second display panel 20 is located.

The second direction Y in the present invention refers to the direction perpendicular to the first direction X on the plane where the second display panel 20 is located. It can also be understood that the second direction Y refers to the row of output pads in the first driving unit 70. Cloth direction.

Specifically, along the second direction Y, the center of the first driving unit 70 coincides with the center of the first heat-affected zone 2001, which means that along the second direction Y, the centerline of the first heat-affected zone 2001 coincides with the first driving unit 70 centerlines coincide. Along the second direction Y, the width of the first drive unit 70 is m1, and the width of the first heat-affected zone 2001 is m2, where the first heat-affected zone 2001 is caused by the high-temperature process when binding the first drive unit 70 The temperature difference of the fourth base substrate 202, the thermal stress causes stress birefringence in the first heat-affected zone 2001, and the optical path difference changes. The first driving unit 70 has a plurality of output pads, and the fourth base substrate 202 has A plurality of input pads, binding the output pads to the input pads in one-to-one correspondence, then the space occupied by the output pads in the second direction Y will be equal to or smaller than the width of the first drive unit 70 in the second direction Y Correspondingly, the space of the output pad in the second direction Y determines the width of the first heat-affected zone 2001 in the second direction Y, thus, the width m1 of the first driving unit 70 is greater than or equal to the first heat-affected zone 2001 The area 2001 has a width m2.

Since the first heat-affected zone 2001 is located in the non-display area BB, the first heat-affected zone 2001 with higher brightness will not appear in the display area AA of the display module 100, and there will be no brightness unevenness in the display area AA in the black state To solve the problem, the uniformity of the black state brightness of the display module 100 is improved.

In some optional embodiments, continue to refer to FIG. 3 to FIG. 5 , along the first direction X, the width of the first heat-affected zone 2001 is a, 0<a≤15mm; along the second direction Y, the first heat-affected zone The width of the region 2001 is b, where 0<b≦50mm.

Specifically, the width of the first heat-affected zone 2001 in the first direction X and the second direction Y is determined by the high-temperature process for binding the first drive unit 70, and the width of the first heat-affected zone 2001 in the first direction X The larger the width, or the larger the width of the first heat-affected zone 2001 in the second direction Y, the larger the range of COG Mura generated by the second display panel 20, so the first heat-affected zone 2001 should be minimized in the first direction X The width in the upper direction and the second direction Y can reduce the area where COG mura is generated on the second display panel 20 .

In this embodiment, along the first direction X, the width of the first heat-affected zone 2001 is a, 0<a≤15mm; along the second direction Y, the width of the first heat-affected zone 2001 is b, 0<b≤50mm, The area of the second display panel 20 where the COG mura is generated, that is, the area of the first heat-affected zone 2001 , is relatively small under the premise that the high-temperature process allows.

In some optional embodiments, referring to FIG. 3 to FIG. 5 , along the first direction X, the distance from the first driving unit 70 to the first heat-affected zone 2001 is c, 2.5mm≤c≤4.5mm.

It can be understood that when the first drive unit 70 is bound, the first heat-affected zone 2001 will be generated due to the high-temperature process, and there will be a distance c between the first heat-affected zone 2001 and the first drive unit 70. The smaller c is, the better. Since the first heat-affected zone 2001 is located in the non-display zone BB, if the distance c from the first drive unit 70 to the first heat-affected zone 2001 is reduced, the non-display zone BB can be reduced as much as possible. The width in one direction X, that is, to achieve a narrow border. Optionally, the method of reducing the distance c from the first drive unit 70 to the first heat-affected zone 2001 may be, for example, to appropriately reduce the bonding temperature without affecting the bonding effect. Of course, other methods may also be used, which are not mentioned here. Be specific. In this embodiment, 2.5mm≤c≤4.5mm can compress the width of the non-display area BB in the first direction X as much as possible to achieve a narrow frame.

In some optional embodiments, referring to FIG. 6, FIG. 7 and FIG. 8, FIG. 6 is a schematic plan view of another display module provided by the present invention, and FIG. 7 is an exploded schematic view of the display module in FIG. 6, Fig. 8 is a cross-sectional view along CC' in Fig. 6 .

A second drive unit 80 is bound to the first frame 40 of the first display panel 10, and a second heat-affected zone 1001 located on the side of the first drive unit 70 close to the display area AA along the first direction X; The light area 50 includes a first area 5001 and a second area 5002, the first area 5001 is located on the side of the second area 5002 close to the second drive unit 80, the brightness of the sub-pixels in the first area 5001 is smaller than that of the sub-pixels in the second area 5002 brightness; the orthographic projection of the second thermal response region on the plane where the second display panel 20 is located is the first projection, the orthographic projection of the first region 5001 on the plane where the second display panel 20 is located is the second projection, and the area of the first projection is less than The area of the second projection.

In this embodiment, in the direction Z perpendicular to the light emitting surface K1 of the display module 100 , there is no overlap between the first driving unit 70 and the second driving unit 80 . In the first direction X, the second driving unit 80 is located on a side of the first driving unit 70 close to the display area AA.

A second driving unit 80 is bound to the first frame 40 of the first display panel 10 , and optionally, the second driving unit 80 is bound to the side of the second base substrate 102 close to the light-emitting surface K1 of the display module 100 .

6 to 8 only schematically show the situation with a first drive unit 70 and a second drive unit 80, for the first drive unit 70 and the second drive unit 80 can also be more than one, here Not specifically limited. The film layer structures of the first display panel 10 and the second display panel 20 will not be repeated here. 6 to 8 only show the case where the first driving unit 70 and the second driving unit 80 do not overlap in the direction Z perpendicular to the light-emitting surface K1 of the display module. Of course, the first driving unit 70 and the second driving unit 80 may also partially overlap in the direction Z perpendicular to the light-emitting surface K1 of the display module, which is not shown in the figure.

Optionally, referring to FIG. 6 to FIG. 8 , the second heat-affected zone 1001 generated by the high-temperature process when the second driving unit 80 is bound is at least partially located in the display area AA. In this embodiment, although the first heat-affected zone 2001 is located in the non-display area BB, the second heat-affected zone 1001 is located in the display area AA, so the brightness of the position corresponding to the second heat-affected zone 1001 is higher, resulting in a display blur. The problem of uneven brightness of the group 100 in the black state. It should be noted that after the light passes through the second display panel 20 , the light flux decreases when the light reaches the first display panel 10 because the light transmittance decreases. Of course, the brightness of the light also decreases after passing through the second heat-affected zone 1001 .

In this embodiment, the second light-passing area 50 includes a first area 5001 and a second area 5002. The first area 5001 is located on the side of the second area 5002 close to the second drive unit 80. The brightness of the sub-pixels in the first area 5001 is less than The brightness of the sub-pixels in the second area 5002, in this embodiment, the second area 5002 and the first area 5001 are only a part of the second light-transmitting area 50, of course, the sum of the areas of the second area 5002 and the first area 5001 can also be used It is equal to the area of the second light-transmitting area 50, that is, the part of the second light-transmitting area 50 except the first area 5001 is the second area 5002, which is not shown in the drawings. The first region 5001 is a part close to the second driving unit 80, reducing the brightness of the sub-pixels in the first region 5001 can balance the increase in brightness of the second heat-affected region 1001 due to the high-temperature process, such as the light emitted from the second display panel 20 After the light passes through the second heat-affected zone 1001, the brightness is A1, and the light emitted from the second display panel 20 passes through the area other than the second heat-affected zone 1001, and the brightness is A2, A1>A2. The brightness of the sub-pixel is B1, the brightness of the sub-pixel in the second area 5002 is B2, and B1<B2, then the brightness of the final display module 100 corresponds to the brightness of the first area 5001 is A1+B1, and corresponds to the brightness of the second area 5002. The brightness is A2+B2, and A1+B1 and A2+B2 are nearly equal, so that the problem of uneven brightness of the display module 100 in the black state can be improved.

For the second display panel 20, its first heat-affected zone 2001 is located in the non-display area BB, so after the light passes through the first heat-affected zone 2001, although the brightness will increase, it will be blocked by the light-shielding layer 90 in the non-display area BB. , will not appear in the display area AA. For the first display panel 10, the brightness of the sub-pixels in the first area 5001 is smaller than the brightness of the sub-pixels in the second area 5002. By reducing the brightness of the sub-pixels in the first area 5001 , then superimpose the increase in brightness caused by the birefringence in the second heat-affected zone 1001 in the first area 5001, and finally correspond to the brightness trend of the display module 100 in the first area 5001 and the brightness of the display module 100 in the second area 5002. in agreement.

The orthographic projection of the second thermal response region on the plane where the second display panel 20 is located is the first projection, the orthographic projection of the first region 5001 on the plane where the second display panel 20 is located is the second projection, and the area of the first projection is smaller than the second projection area. It should be noted that if the area of the first projection is larger than the area of the second projection, then the area of the first area 5001 corresponding to the reduction of sub-pixel brightness is smaller than the area of the second heat-affected area 1001, that is, there will still be a part of the second heat-affected area 1001. The brightness of the sub-pixels in the heat-affected zone 1001 is relatively high. Overall, the brightness of this part of the sub-pixels is higher than that of other regions, and there is still the problem of poor brightness uniformity in the black state. In this embodiment, the area of the first projection is smaller than the area of the second projection, so that the area of the first area 5001 that reduces the brightness of the sub-pixel is larger than the area of the second heat-affected area 1001, ensuring that the display module 100 corresponds to the second heat-affected area. The overall brightness of area 1001 is consistent with the overall brightness of other areas.

In some optional embodiments, referring to FIG. 9, FIG. 10, FIG. 11 and FIG. 12, FIG. 9 is a schematic plan view of another display module provided by the present invention, and FIG. 10 is a schematic view of the display module in FIG. Exploded schematic diagram, Figure 11 is a sectional view of DD' in Figure 9, Figure 12 is a sectional view of EE' in Figure 9, the second heat-affected zone 1001 is located in the first light-passing zone 30 Inside, the first heat-affected zone 2001 is located in the second light-transmitting zone 50 , and in the direction Z perpendicular to the light-emitting surface K1 of the display module 100 , the second driving unit 80 does not overlap with the first driving unit 70 .

Specifically, FIG. 9 to FIG. 12 show the situation that there are two first drive units 70 and two second drive units 80, and the first drive unit 70 and the second drive unit 80 can be displayed according to the actual product. The width of the group 100 in the second direction Y depends on, which is not specifically limited here. The film layer structures of the first display panel 10 and the second display panel 20 will not be repeated here. 9 to 12 show that the first driving unit 70 and the second driving unit 80 do not overlap in the first direction X, of course the first driving unit 70 and the second driving unit 80 are in the first direction X There may also be an overlap, which is not shown in the figure. In this embodiment, in the direction Z perpendicular to the light-emitting surface K1 of the display module 100, the second driving unit 80 does not overlap with the first driving unit 70, and the first driving unit 70 contains a plurality of pads for transmitting signals, and the second drive unit 80 also contains a plurality of pads for transmitting signals. When working, the pads will transmit electrical signals, so the second drive unit 80 and the first The driving unit 70 will generate heat during the working process. In the direction Z perpendicular to the light-emitting surface K1 of the display module 100, the second driving unit 80 does not overlap with the first driving unit 70, so the number of the second driving unit 80 and the first driving unit 70 can be reduced. The first driving units 70 interfere with each other due to excessive temperature.

Optionally, referring to FIG. 9 to FIG. 12 , the area of the display area AA of the display module 100 is equal to the area of the first light-transmitting area 30 of the first display panel 10 , and the area of the first frame 40 of the first display panel 10 That is, the area of the non-display area BB of the display module 100. The first frame 40 of the first display panel 10 blocks the first drive unit 70 and the first heat-affected zone 2001 of the second display panel 20. The second heat-affected zone 1001 generated by the high-temperature process when the second drive unit 80 is at least partially located in the first light-transmitting area 30 , that is, the second heat-affected zone 1001 is located in the display area AA of the display module 100 . The first heat-affected zone 2001 is located in the second light-transmitting zone 50, that is, the width of the second frame 60 in the first direction X is smaller than the width of the first frame 40 in the first direction X, although the first heat-affected zone 2001 It is located in the second light-transmitting area 50, but will be blocked by the first frame 40 of the first display panel 10, exactly corresponding to the first frame 40, on the side where the first base substrate 101 is close to the second base substrate 102 The light-shielding layer 90 is provided on the side, and the first heat-affected zone 2001 is still in the non-display area BB of the display module 100 .

The first heat-affected zone 2001 is located in the non-display area BB, the second heat-affected zone 1001 is located in the first light-transmitting area 30, that is, the second heat-affected zone 1001 is located in the display area AA, so a corresponding second heat-affected zone will appear The position of 1001 has higher brightness, which leads to the problem of uneven brightness when the display module 100 is in a black state. It should be noted that after the light passes through the second display panel 20 , the luminous flux of the light reaching the first display panel 10 will decrease due to the decrease of the light transmittance.

In this embodiment, the brightness of the sub-pixels in the first area 5001 is smaller than the brightness of the sub-pixels in the second area 5002. FIG. Of course, the first region 5001 is the part close to the second drive unit 80. Here, by reducing the brightness of the sub-pixels in the first region 5001, the brightness increase of the second heat-affected region 1001 due to the high-temperature process can be balanced, thereby improving the The problem of uneven brightness of the display module 100 in the black state.

For the second display panel 20, its first heat-affected zone 2001 is located in the non-display area BB, so after the light passes through the first heat-affected zone 2001, although the brightness will increase, it will be absorbed by the first frame 40 of the first display panel 10. Blocking, will not appear in the display area AA, for the first display panel 10, the brightness of the sub-pixels in the first area 5001 is smaller than the brightness of the sub-pixels in the second area 5002, by reducing the brightness of the sub-pixels in the first area 5001 The brightness is superimposed with the increase in brightness caused by the birefringence in the second heat-affected zone 1001 in the first area 5001, and finally corresponds to the brightness of the display module 100 in the first area 5001 and the brightness of the display module 100 in the second area 5002. The brightness tends to be consistent.

The orthographic projection of the second thermal response region on the plane where the second display panel 20 is located is the first projection, the orthographic projection of the first region 5001 on the plane where the second display panel 20 is located is the second projection, and the area of the first projection is smaller than the second projection The area of the first area 5001 that reduces the brightness of the sub-pixels is larger than the area of the second heat-affected zone 1001, ensuring that the overall brightness of the display module 100 corresponding to the second heat-affected zone 1001 is consistent with the overall brightness of other areas.

It should be noted that, in the above-mentioned related art, referring to Fig. 1 and Fig. 2, when the first heat-affected zone 07 and the second heat-affected zone 08 overlap, the birefringence will be superimposed and produce two COG Mura, and the superimposed The brightness is brighter, and the brightness uniformity of the black state is worse. In this embodiment, in the direction Z perpendicular to the light-emitting surface K1 of the display module 100, the second driving unit 80 does not overlap with the first driving unit 70, then The generated first heat-affected zone 2001 and the first heat-affected zone 1001 will not overlap, and the light will not produce COG Mura twice. Of course, because the first heat-affected zone 1001 is located in the non-display area BB in the present invention, the black In this state, there will be no problem of uneven brightness in the display area AA, which improves the uniformity of brightness in the black state of the display module 100 .

In some optional embodiments, referring to FIG. 9 to FIG. 12 , in the direction Z perpendicular to the light emitting surface K1 of the display module 100 , the second driving unit 80 and the first driving unit 70 are alternately arranged.

It can be understood that the first driving unit 70 and the second driving unit 80 will generate heat during operation. In the direction Z perpendicular to the light-emitting surface K1 of the display module 100 If they overlap partially or completely, the heat generated will cause interference. In this embodiment, in the direction Z perpendicular to the light-emitting surface K1 of the display module 100, the second driving unit 80 does not overlap with the first driving unit 70, so the distance between the second driving unit 80 and the first driving unit 70 can be reduced. They interfere with each other due to excessive temperature.

Optionally, along the second direction Y, the distances between the second drive unit 80 and the first drive unit 70 are equal, equal to L1, when binding the first drive unit 70 and the second drive unit 80 , it is necessary to align the first driving unit 70 with the binding area on the fourth base substrate 202, and to align the second driving unit 80 with the binding area on the second base substrate 102, so the alignment accuracy It will affect the stability of signal transmission. During alignment, the high-definition camera on the machine needs to capture the position of the binding area to be bound by the first drive unit 70 and the second drive unit 80. The second drive unit 80 and The distances between the first driving units 70 are equal, so it is easier to capture the position of the binding area and improve the binding efficiency.

In some optional embodiments, referring to FIGS. 9 to 12 , the first frame 40 includes a first sub-frame 401 , the second frame 60 includes a second sub-frame 601 , and the first drive unit 70 is located in the second sub-frame 601 The orthographic projection of the first sub-frame 401 on the plane where the second display panel 20 is located is the first orthographic projection, and the orthographic projection of the second sub-frame 601 on the plane where the second display panel 20 is located is the second orthographic projection. In the direction Z of the light exit surface K1 of the group 100, the first orthographic projection overlaps with the second orthographic projection;

Along the first direction X, the width of the first sub-frame 401 is d1, and the width of the second sub-frame 601 is d2, d1≠d2, wherein the first direction X is parallel to the light emitting surface K1 of the display module 100 .

Specifically, the first frame 40 includes a first sub-frame 401, the second drive unit 80 is located in the first sub-frame 401, along the first direction X, the width of the first sub-frame 401 is d1, and the second frame 60 includes a second Two sub-frames 601, the first driving unit 70 is located in the second sub-frame 601, along the first direction X, the width of the second sub-frame 601 is d2, the first sub-frame 401 is on the plane where the second display panel 20 is located The projection is the first orthographic projection, and the orthographic projection of the second sub-frame 601 on the plane where the second display panel 20 is located is the second orthographic projection. In the direction Z perpendicular to the light-emitting surface K1 of the display module 100, the first orthographic projection and the second orthographic projection The two orthographic projections overlap, that is, the first sub-frame 401 and the second sub-frame 601 are located on the same side, that is, if the first sub-frame 401 is the lower frame of the first frame 40, then the second sub-frame 601 is also the second frame 60 In the present invention, along the first direction X, the width d1 of the first sub-frame 401 is not equal to the width d2 of the second sub-frame 601, so that the first heat-affected zone 2001 is located in the non-display area BB, of course FIG. 10 only shows the case where d1 is greater than d2, and of course d1 may also be smaller than d2, which is not specifically limited here.

Since the first heat-affected zone 2001 is located in the non-display area BB, the first heat-affected zone 2001 with higher brightness will not appear in the display area AA of the display module 100, and there will be no brightness unevenness in the display area AA in the black state To solve the problem, the uniformity of the black state brightness of the display module 100 is improved.

Of course, the brightness of the sub-pixels in the first region 5001 of the display module 100 of this embodiment is smaller than the brightness of the sub-pixels in the second region 5002, and by reducing the brightness of the sub-pixels in the first region 5001, the second heat-affected zone can be balanced 1001 The brightness increase caused by the high temperature process can improve the uneven brightness of the display module 100 in the black state.

In addition, in the present invention, the first driving unit 70 and the second driving unit 80 do not overlap in the direction perpendicular to the light-emitting surface of the display module, and the binding of the first driving unit 70 or the second driving unit 80 can be determined according to actual needs. Determine the position to achieve the diversity of binding positions.

In some optional embodiments, continue to refer to FIG. 9 to FIG. 12 , d1>d2, in the direction Z perpendicular to the light-emitting surface K1 of the display module 100 , the first sub-frame 401 covers the first heat-affected zone 2001 .

In this embodiment, along the first direction X, the width d1 of the first sub-frame 401 is greater than the width d2 of the second sub-frame 601, and in the direction Z perpendicular to the light-emitting surface K1 of the display module 100, the first sub-frame 401 Covering the first heat-affected zone 2001, the first heat-affected zone 2001 is blocked by the first sub-frame 401 of the first display panel 10, for the second display panel 20, although the brightness of the light passing through the first heat-affected zone 2001 will increase However, it will be blocked by the first sub-frame 401 of the first display panel 10 , and the first heat-affected zone 2001 is located in the non-display area BB and will not appear in the display area AA. For the first display panel 10, the brightness of the sub-pixels in the first region 5001 is smaller than the brightness of the sub-pixels in the second region 5002, by reducing the brightness of the sub-pixels in the first region 5001, and then superimposing the first region 5001 due to The brightness increase caused by birefringence in the second heat-affected zone 1001 finally corresponds to the brightness of the display module 100 in the first zone 5001 and the brightness of the display module 100 in the second zone 5002 tend to be consistent.

In some optional embodiments, referring to FIG. 6 to FIG. 8 , d1<d2, the first thermal response area is located in the second sub-frame 601 .

Specifically, the first frame 40 includes a first sub-frame 401, the second drive unit 80 is located in the first sub-frame 401, along the first direction X, the width of the first sub-frame 401 is d1, and the second frame 60 includes a second Two sub-frames 601, the first driving unit 70 is located in the second sub-frame 601, along the first direction X, the width of the second sub-frame 601 is d2, the first sub-frame 401 is on the plane where the second display panel 20 is located The projection is a first orthographic projection (not shown in the figure), and the orthographic projection of the second sub-frame 601 on the plane where the second display panel 20 is located is a second orthographic projection (not shown in the figure), perpendicular to the display module 100 In the direction Z of the light-emitting surface K1, the first orthographic projection overlaps with the second orthographic projection, that is, the first sub-frame 401 and the second sub-frame 601 are located on the same side, that is, if the first sub-frame 401 is the bottom of the first frame 40 Frame, then the second sub-frame 601 is also the lower frame of the second frame 60. In this embodiment, along the first direction X, the width d1 of the first sub-frame 401 is smaller than the width d2 of the second sub-frame 601, that is, the width d1 of the second sub-frame 601. The second sub-frame 601 of the second display panel 20 is widened in the first direction X, covering the first heat-affected zone 2001, which is located in the non-display area BB of the display module 100, due to the first heat-affected zone 2001 The area 2001 is located in the non-display area BB, the first heat-affected area 2001 with higher brightness will not appear in the display area AA of the display module 100, and the problem of uneven brightness will not appear in the display area AA in the black state, which improves the The brightness uniformity of the black state of the display module 100 .

Of course, although the first heat-affected zone 2001 is located in the non-display area BB, the second heat-affected zone 1001 is located in the display area AA, so the brightness of the position corresponding to the second heat-affected zone 1001 is higher, causing the display module 100 The problem of uneven brightness in black state. In this embodiment, the second light-passing area 50 includes a first area 5001 and a second area 5002. The first area 5001 is located on the side of the second area 5002 close to the second drive unit 80. The brightness of the sub-pixels in the first area 5001 is less than The brightness of the sub-pixels in the second region 5002 can be reduced by reducing the brightness of the sub-pixels in the first region 5001, which can balance the increase in brightness of the second heat-affected region 1001 caused by the high-temperature process, thereby improving the brightness of the display module 100 in the black state. uneven problem.

In some optional embodiments, referring to FIG. 13 , FIG. 14 and FIG. 15 , FIG. 13 is a schematic plan view of another display module provided by the present invention, and FIG. 14 is an exploded schematic view of the display module in FIG. 13 . Fig. 15 is a cross-sectional view of FF' in Fig. 13, the first sub-frame 401 is bound with the second drive unit 80 and the second heat-affected zone 1001 partially surrounding the second drive unit 80, perpendicular to In the direction Z of the light emitting surface K1 of the display module 100 , the second sub-frame 601 covers the second heat-affected zone 1001 .

13 to 15, in the first direction X, the first driving unit 70 and the second driving unit 80 do not overlap. Of course, along the first direction X, the first driving unit 70 and the second driving unit 80 may also have The overlap is not specifically limited here. When the first driving unit 70 and the second driving unit 80 do not overlap in the first direction X, mutual interference due to high temperature generated in the working state can be avoided.

13 to 15 only illustrate the situation that the first driving unit 70 and the second driving unit 80 do not overlap along the first direction X, and only illustrate that there is one first driving unit 70 and one second driving unit 80 case, there is no specific limitation here.

In this embodiment, the second drive unit 80 is bound to the first sub-frame 401 of the first display panel 10 , of course, the first sub-frame 401 also includes a second heat-affected zone 1001 partially surrounding the second drive unit 80 , The second sub-frame 601 of the second display panel 20 is bound with the first driving unit 70 and the first heat-affected zone 2001 partially surrounding the first driving unit 70 , in the direction Z perpendicular to the light-emitting surface K1 of the display module 100 , the second sub-frame 601 covers the second heat-affected zone 1001, the second sub-frame 601 of the second frame 60 covers the first heat-affected zone 2001 and also blocks the second heat-affected zone 1001, the second heat-affected zone 1001 and the second heat-affected zone 1001 A heat-affected zone 2001 is located in the non-display area BB of the display module 100. Since the second heat-affected zone 1001 and the first heat-affected zone 2001 are both located in the non-display area BB, the first heat-affected zone 2001 with higher brightness And the second heat-affected zone 1001 with higher brightness will not appear in the display area AA of the display module 100, and the problem of uneven brightness will not appear in the display area AA in the black state, which further improves the black color of the display module 100. State brightness uniformity. Of course, due to the shielding effect of the second sub-frame 601 , the light itself will not enter the second heat-affected zone 1001 , which can further improve the uniformity of black state brightness of the display module 100 .

In some optional embodiments, refer to FIG. 16 and FIG. 17 , FIG. 16 is a schematic plan view of another display module provided by the present invention, and FIG. 17 is an exploded schematic view of the display module in FIG. 16 .

The first frame 40 includes a first sub-frame 401, the second frame 60 includes a second sub-frame 601, and the first drive unit 70 is located in the second sub-frame 601; the orthographic projection of the first sub-frame 401 on the plane where the second display panel 20 is located is the first orthographic projection, the orthographic projection of the second sub-frame 601 on the plane where the second display panel 20 is located is the second orthographic projection, and on the plane where the second display panel 20 is located, the first orthographic projection and the second orthographic projection at least partially overlap ; Along the first direction X, the width of the first sub-frame 401 is d1, along the second direction Y, the width of the second sub-frame 601 is d2, d1<d2; wherein, the second direction Y is perpendicular to the first direction X, The second direction Y is parallel to the light emitting surface K1 of the display module 100 .

Specifically, the first frame 40 includes a first sub-frame 401, the second drive unit 80 is located in the first sub-frame 401, along the first direction X, the width of the first sub-frame 401 is d1, and the second frame 60 includes a second Two sub-frames 601, the first driving unit 70 is located in the second sub-frame 601, along the second direction Y, the width of the second sub-frame 601 is d2, the first sub-frame 401 is on the plane where the second display panel 20 is located The projection is a first orthographic projection (not shown in the figure), and the orthographic projection of the second sub-frame 601 on the plane where the second display panel 20 is located is a second orthographic projection (not shown in the figure), perpendicular to the display module 100 In the direction Z of the light-emitting surface K1, the first orthographic projection overlaps with the second orthographic projection. In this embodiment, the second sub-frame 601 of the second display panel 20 in the second direction Y is widened so that the first thermal The affected area 2001 is located in the second sub-frame 601 .

FIG. 16 shows that the first driving unit 70 and the second driving unit 80 are located on different sides of the non-display area BB, which can also avoid mutual interference due to high temperature generated in the working state.

It should be noted that, FIG. 17 only shows the situation that the second heat-affected zone 1001 may also be at least partially located in the first light-transmissive zone 30 , of course, the second heat-affected zone 1001 may also be located in the first sub-frame 401 case, there is no specific limitation here. When the second heat-affected zone 1001 is at least partly located in the first light-transmitting zone 30, since the light will first pass through the second display panel 20, the transmittance will decrease, and the degree of birefringence of the light in the second heat-affected zone 1001 will be due to The transmittance of the light passing through the second display panel 20 decreases and is weakened. When the second heat-affected zone 1001 is located in the first sub-frame 401, the second heat-affected zone 1001 is located in the non-display area BB of the display module 100, so that there will be no problem of uneven brightness in the display area AA in the black state .

In this embodiment, the first heat-affected zone 2001 is located in the second sub-frame 601, and the width of the second sub-frame 601 in the second direction Y is enlarged so that the first heat-affected zone 2001 is located in the second sub-frame 601, Since the first heat-affected zone 2001 is located in the non-display area BB, the first heat-affected zone 2001 with higher brightness will not appear in the display area AA of the display module 100, and the display area AA will not appear in the black state. average problem.

On the other hand, the first drive unit 70 and the second drive unit 80 are located on different sides of the non-display area BB, and there is enough space in the first direction X to set the first drive unit 70, then the first drive unit 70 in the The spacing between the pads arranged in the first direction X can be increased, which can avoid signal crosstalk between adjacent pads. Similarly, there is enough space in the second direction Y to set the second drive unit 80. The spacing between pads arranged in the second direction Y in the second driving unit 80 may also be increased, so as to avoid signal crosstalk between adjacent pads.

Furthermore, the first driving unit 70 and the second driving unit 80 are located on different sides of the non-display area BB, and there is enough space in the first direction X to arrange a plurality of first driving units 70 to meet the needs of different types of display modules. It is required that there is enough space in the second direction Y to arrange a plurality of second driving units 80 to meet the requirements of different types of display modules.

In some optional embodiments, referring to FIG. 18 , FIG. 18 is another exploded schematic view of the display module in FIG. 16 , the first heat-affected zone 2001 is located in the first sub-frame 401 .

Referring to Figure 18, the width of the first sub-frame 401 in the second direction Y is also widened, and of course the width of the second sub-frame 601 in the second direction Y is also widened, so that the second sub-frame 601 can be further ensured. Located in the non-display area BB of the display module 100, in the direction perpendicular to the plane where the display module 100 is located, the first heat-affected zone 2001 is located in the second sub-frame 601 and the first sub-frame 401, due to the first heat The affected area 2001 is located in the non-display area BB of the display module 100, the first heat-affected area 2001 with higher brightness will not appear in the display area AA of the display module 100, and the display area AA will not appear in the black state. uneven problem.

In some optional embodiments, referring to FIG. 5 , FIG. 8 , FIG. 11 , FIG. 12 and FIG. 15 , both the first frame 40 and the second frame 60 include a light-shielding layer 90 .

Fig. 5, Fig. 8, Fig. 11, Fig. 12 and Fig. 15 only show that the light-shielding layer 90 is included in the first frame 40 and the second frame 60. The side close to the second base substrate 102 is coated with a light-shielding layer 90, which can be manufactured in the same process as the black matrix (not shown in the figure) in the color filter layer 107 of the first display panel 10, which can simplify the manufacturing process Of course, a light-shielding layer 90 (not shown) can also be provided on the side of the first base substrate 101 away from the second base substrate 102; One side of the four-substrate substrate 202 is coated with a light-shielding layer 90, and of course a light-shielding layer 90 (not shown) may be provided on the side of the third substrate substrate 201 away from the fourth substrate substrate 202 (not shown in the figure). Specific limits.

The light-shielding layer 90 can prevent light leakage in the non-display area BB. On the other hand, the present invention can shield the first heat-affected zone 2001 through the light-shielding layer 90, and of course can also shield the second heat-affected zone 1001, thereby making the first heat-affected zone 2001 Located in the non-display area BB, the second heat-affected zone 1001 can also be located in the non-display area BB, so that the first heat-affected zone 2001 and the second heat-affected zone 1001 with higher brightness will not appear in the display module 100 In the display area AA, the problem of uneven brightness does not occur in the display area AA in the black state.

The present invention also provides a display device. Referring to FIG. 19 and FIG. 20 , FIG. 19 is a schematic plan view of a display device provided by the present invention, and FIG. 20 is a cross-sectional view along the G-G' direction in FIG. 19 . The display device 1000 includes a display module 100, and also includes a backlight module 200 located on the side of the display module 100 away from the light-emitting surface K1 of the display module. The backlight module 200 provides a backlight for the display module 100. The implementation of FIG. 19 and FIG. 20 Example Only the vehicle-mounted display device is taken as an example to describe the display device. It can be understood that the display device provided by the embodiment of the present invention may be a mobile phone, a computer, a television, an electronic paper or other display devices with display functions. The present invention There is no specific limitation on this. The display device provided by the embodiment of the present invention has the beneficial effect of the display panel 100 provided by the embodiment of the present invention. For details, reference may be made to the specific descriptions of the display panel 100 in the above embodiments, and details will not be repeated here in this embodiment.

It can be seen from the above embodiments that the display module and the display device provided by the present invention at least achieve the following beneficial effects:

The display module of the present invention is a dual-screen display module, including a first display panel and a second display panel oppositely arranged, the first display panel is located on the side of the second display panel close to the light-emitting surface of the display module, and the first display panel The second display panel includes a first light-transmitting area and a first frame surrounding the first light-transmitting area, and the second display panel includes a second light-transmitting area and a second frame surrounding the second light-transmitting area. Above, the display area is the overlapping area of the first light transmission area and the second light transmission area, the display module includes a display area and a non-display area surrounding the display area, and the second frame of the second display panel is bound with the first The drive unit, and the first heat-affected zone located on the side of the first drive unit close to the display area along the first direction, and the first heat-affected zone surrounds the first drive unit. direction, the first heat-affected zone is located in the non-display zone, even if there is a temperature difference when the first drive unit is bound, stress birefringence will occur when the light passes through the first heat-affected zone, and the brightness of the first heat-affected zone will increase Higher, but because the first heat-affected zone is in the non-display area of the display module, it will not appear in the display area of the display module. In the black state, there will be no uneven brightness in the display area, which improves the display The brightness uniformity of the black state of the module.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (15)

1. A display module, characterized in that the display module includes a display area and a non-display area surrounding the display area, and the display module includes a first display panel and a second display panel oppositely arranged, The first display panel is located on a side of the second display panel close to the light-emitting surface of the display module; The first display panel includes a first light transmission area and a first frame surrounding the first light transmission area, and the second display panel includes a second light transmission area and a second frame surrounding the second light transmission area. In the frame, in a direction perpendicular to the light-emitting surface of the display module, the display area is an area where the first light-transmissive area and the second light-transmissive area overlap; A first drive unit is bound to the second frame of the second display panel, and a first heat-affected zone located on a side of the first drive unit close to the display area along the first direction, and the first drive unit A heat-affected zone surrounds the first driving unit; wherein, the first direction is parallel to the plane where the second display panel is located; In a direction perpendicular to the light-emitting surface of the display module, the first heat-affected zone is located in the non-display zone. 2. The display module according to claim 1, wherein, along the second direction, the center of the first driving unit coincides with the center of the first heat-affected zone; Along the second direction, the width of the first drive unit is m1, the width of the first heat-affected zone is m2, m1≥m2; Wherein, on the plane where the second display panel is located, the second direction is perpendicular to the first direction, and the second direction is parallel to the plane where the second display panel is located. 3 . The display module according to claim 2 , wherein along the first direction, the width of the first heat-affected zone is a, 0<a≤15mm, 0<m2≤50mm. 4. The display module according to claim 1, characterized in that, along the first direction, the distance from the first driving unit to the first heat-affected zone is c, 2.5mm≤c≤4.5mm . 5. The display module according to claim 1, wherein a second drive unit is bound to the first frame of the first display panel, and along the first direction, located at the first drive unit A second heat-affected zone on the side of the unit close to the display area; The second light-passing area includes a first area and a second area, the first area is located on a side of the second area close to the second driving unit, and the brightness of the sub-pixels in the first area is smaller than the the brightness of the sub-pixels in the second region; The orthographic projection of the second thermal response area on the plane where the second display panel is located is a first projection, the orthographic projection of the first area on the plane where the second display panel is located is a second projection, and the first projection The projected area is smaller than the second projected area. 6. The display module according to claim 5, wherein the second heat-affected zone is located in the first light-transmissive zone, and the first heat-affected zone is located in the second light-transmissive zone , in a direction perpendicular to the light emitting surface of the display module, the second driving unit does not overlap with the first driving unit. 7 . The display module according to claim 6 , wherein, in a direction perpendicular to the light-emitting surface of the display module, the second driving units are arranged alternately with the first driving units. 8. The display module according to claim 5, wherein the first frame includes a first sub-frame, the second frame includes a second sub-frame, and the first driving unit is located in the second The sub-frame; the orthographic projection of the first sub-frame on the plane where the second display panel is located is the first orthographic projection, and the orthographic projection of the second sub-frame on the plane where the second display panel is located is the second orthographic projection, which is perpendicular to In the direction of the light-emitting surface of the display module, the first orthographic projection overlaps with the second orthographic projection; Along the first direction, the width of the first sub-frame is d1, and the width of the second sub-frame is d2, where d1≠d2, wherein the first direction is parallel to the light-emitting surface of the display module. 9. The display module according to claim 8, wherein d1>d2, the first sub-frame covers the first heat-affected zone in a direction perpendicular to the light-emitting surface of the display module. 10. The display module according to claim 8, wherein d1<d2, the first thermal response area is located in the second sub-frame. 11. The display module according to claim 10, wherein a second drive unit and a second heat-affected zone partially surrounding the second drive unit are bound in the first sub-frame, and are perpendicular to the In the direction of the light-emitting surface of the display module, the second sub-frame covers the second heat-affected zone. 12. The display module according to claim 1, wherein the first frame includes a first sub-frame, the second frame includes a second sub-frame, and the first driving unit is located in the second child border; The orthographic projection of the first sub-frame on the plane where the second display panel is located is a first orthographic projection, and the orthographic projection of the second sub-frame on the plane where the second display panel is located is a second orthographic projection. The plane where the second display panel is located, the first orthographic projection at least partially overlaps with the second orthographic projection; Along the first direction, the width of the first sub-frame is d1, and along the second direction, the width of the second sub-frame is d2, where d1<d2; wherein, the second direction is the same as the first The direction is vertical, and the second direction is parallel to the light emitting surface of the display module. 13. The display module according to claim 12, wherein the first heat-affected zone is located in the first sub-frame. 14. The display module according to claim 1, wherein both the first frame and the second frame comprise a light-shielding layer. 15. A display device, comprising the display module according to any one of claims 1 to 14, further comprising a backlight module located on the side of the display module away from the light-emitting surface of the display module.

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