Backlight module and display device

Abstract

The utility model discloses a backlight module and a display device, and belongs to the technical field of display. The backlight module comprises a back plate, a light guide plate, glass and a fixing structure, the back plate comprises a first bottom plate and first side plates, the first bottom plate comprises at least one first edge and a plurality of second edges, the first edges and the second edges define a ring shape, and the first side plates are vertically arranged on the first edges; the light guide plate comprises a second bottom plate and a second side plate, the second bottom plate is borne on the first bottom plate, and the second side plate is vertically arranged at the position, corresponding to the second edge, of the second bottom plate; the first side plate and the second side plate bear glass together; the fixing structure is configured to wrap the top surface edge of the glass, the side surface of the glass, the side surface of the back plate, the side surface of the light guide plate and the bottom surface edge of the back plate. According to the backlight module, the requirement for a narrow frame can be met while the structural stability of the backlight module is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field, concretely relates to a backlight module and display device. BACKGROUND

[0002] Liquid crystal display device has many advantages such as thin body, power saving and no radiation, has been widely applied.The liquid crystal display device on the market mostly is back light type liquid crystal display device, and it includes liquid crystal panel and backlight module.The working principle of liquid crystal panel is that liquid crystal molecules are placed between two parallel glass substrates, and there are many vertical and horizontal fine wires in the middle of the two glass substrates, and the liquid crystal molecules change direction by power on and off to refract the light of backlight module to produce picture.Because liquid crystal panel does not emit light, it needs the light source provided by backlight module to normally display image, therefore, backlight module is one of the key structures of liquid crystal display device.

[0003] As shown in Figure 1 In the related art, the backlight module usually includes a back plate 100', a middle frame 200' and an outer frame 300', the back plate 100' includes a bottom plate 110' and a side plate 120' erected around the bottom plate 110', the bottom plate 110' and the side plate 120' surround to form a containing space for containing optical film, one end of the middle frame 200' is annularly arranged outside the bottom plate 110', and the other end of the middle frame 200' extends to the direction of the containing space and is used for carrying a glass 400', the outer frame 300' is annularly arranged outside the middle frame 200', and the glass 400' can be pressed on the middle frame 200'. Wherein, the back plate 100', the middle frame 200' and the outer frame 300' are all prepared by iron material, and the thickness of the back plate 100' is best at 0.6mm-1.0mm, the thickness of the middle frame 200' and the outer frame 300' is best at 0.2mm-0.3mm, if the thickness is too thin, the structural stability of the whole backlight module will be affected, so that the narrow frame requirement of the backlight module cannot be further met.

[0004] Therefore, a backlight module is urgently needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a backlight module and display device, can ensure the structural stability of the whole backlight module, and can meet the narrow frame requirement thereof.

[0006] In order to realize the above target, the utility model adopts the following technical scheme:

[0007] A backlight module, comprising:

[0008] The backboard comprises a first bottom plate and a first side plate, the first bottom plate comprises at least one first edge and a plurality of second edges, the first edges and the second edges form a ring shape, and the first side plate is vertically arranged on each first edge;

[0009] The light guide plate comprises a second bottom plate and a second side plate, the second bottom plate is arranged on the first bottom plate, and the second side plate is vertically arranged on the second bottom plate corresponding to the position of the second edge;

[0010] The glass is supported by the first side plate and the second side plate.

[0011] The fixing structure is arranged on the top edge of the glass, the side of the glass, the side of the backboard, the side of the light guide plate and the bottom edge of the backboard.

[0012] Preferably, the glass is adhered to the second side plate and the first side plate by an adhesive.

[0013] Preferably, the second side plate is used for supporting a first supporting surface of the glass, and the first supporting surface is provided with a groove for partially accommodating the adhesive.

[0014] Preferably, the first supporting surface is provided with a plurality of protruding structures arranged in an array, and the groove is formed between two adjacent protruding structures.

[0015] Preferably, the protruding structure is a multi-pyramid, a multi-prism or a hemisphere.

[0016] Preferably, the inner side of the second side plate is provided with a plug-in groove, the lower groove wall of the plug-in groove is flush with the top surface of the first side plate, and the glass is inserted into the plug-in groove.

[0017] Preferably, the inner side of the second side plate is provided with a reflective layer.

[0018] Preferably, the included angle between the inner side of the second side plate and the second bottom plate is obtuse.

[0019] Preferably, the fixing structure is a mica glue.

[0020] The utility model also provides a display device, including display panel and backlight unit as described above, the backlight unit is used for supporting the display panel, and can provide the backlight source for the display panel.

[0021] The utility model has the advantages of:

[0022] The backlight module provided by the utility model, through setting the second side plate of the light guide plate, the first side plate of the backboard is cooperated to bear the glass together, compared with the scheme that all the side edges of the backboard are provided with the first side plate to bear the glass in the prior art, the backlight module of the utility model can omit the setting of part of the first side plate, the middle frame and the outer frame, and the thickness of the second side plate can be further thinned, so that the whole backlight module cannot further meet the demand of narrow frame due to the limitation of the backboard material is avoided, through setting the fixing structure, the overall fixing of the backboard, the light guide plate and the glass can be realized, so that the stability of the whole backlight module structure is ensured.

[0023] The display device provided by the utility model can further meet the demand of narrow frame and thinness by applying the backlight module, and the structural stability of the whole display device can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the utility model embodiment, the following will briefly introduce the drawings needed to be used in the utility model embodiment description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the content of the utility model embodiment and these drawings without paying the creative labor.

[0025] Figure 1 It is the partial sectional view schematic diagram of the backlight module provided by the prior art;

[0026] Figure 2 It is the partial sectional view schematic diagram of the backlight module provided by the utility model embodiment one;

[0027] Figure 3 It is the structural schematic diagram of the backboard provided by the utility model embodiment one;

[0028] Figure 4 It is the structural schematic diagram of the light guide plate provided by the utility model embodiment one;

[0029] Figure 5 It is the sectional view schematic diagram of the light guide plate provided by the utility model embodiment one;

[0030] Figure 6 It is Figure 5 The local enlarged view at A;

[0031] Figure 7 It is the sectional view schematic diagram of the light guide plate provided by the utility model embodiment two;

[0032] Figure 8 It is the structural schematic diagram of the light guide plate provided by the utility model embodiment three;

[0033] Figure 9 is a cross-sectional view of the light guide plate according to the third embodiment of the present application;

[0034] Figure 10 is a structural view of the back plate according to the fourth embodiment of the present application;

[0035] Figure 11 is a structural view of the light guide plate according to the fourth embodiment of the present application;

[0036] Figure 12 is a structural view of the back plate according to the fifth embodiment of the present application;

[0037] Figure 13 is a structural view of the light guide plate according to the fifth embodiment of the present application.

[0038] Reference signs:

[0039] 100', back plate; 110', bottom plate; 120', side plate; 200', middle frame; 300', outer frame; 400', glass;

[0040] 100, back plate; 110, first bottom plate; 111, first side; 112, second side; 120, first side plate;

[0041] 200, light guide plate; 210, second bottom plate; 2101, light-in surface; 220, second side plate; 221, first bearing surface; 2211, protruding structure; 2212, groove; 222, plug-in slot;

[0042] 300, glass; 400, fixing structure; 500, optical film; 600, adhesive. DETAILED DESCRIPTION

[0043] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0044] In the present application, the terms "comprise", "contain", "have" or any other variant thereof are intended to cover non-exclusive inclusions, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0045] In the utility model, the term "and / or" is a description of the relationship between the associated objects, which means that there can be three kinds of relationships. For example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in the utility model generally indicates that the front and rear associated objects are in a "and / or" relationship.

[0046] In the utility model, the terms "connection", "combination", "coupling" and "installation" can be direct connection, combination, coupling or installation, or indirect connection, combination, coupling or installation. Among them, the direct connection means that two parts or components are connected together without setting an intermediate part, and the indirect connection means that two parts or components are connected through at least one intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0047] In the utility model, the person skilled in the art will understand that the relative terms used in conjunction with the number or condition (for example, "about", "approximately", "substantially" and the like) include the value indicated by the context and have the meaning indicated by the context. For example, the relative term at least includes the error degree related to the measurement of the specific value, the tolerance caused by the manufacturing, assembly, use and the like related to the specific value. Such terms should also be regarded as disclosing the range defined by the absolute values of the two endpoints. The relative term can refer to the addition or subtraction of a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular position relationship (for example, substantially parallel, substantially perpendicular), can refer to the addition or subtraction of a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0048] In the utility model, the person skilled in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0049] In the utility model, the terms "upper", "lower", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the utility model. In addition, it should also be understood in the context that when referring to one element being connected to another element "on" or "under", it can be directly connected to another element "on" or "under", or indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the orientation terms such as upper side, lower side, left side, right side, front side and back side represent not only the positive orientation, but also the lateral orientation. For example, the lower side can include the directly below, left below, right below, front below and back below.

[0050] Embodiment one

[0051] Figure 2 Partially sectioned schematic view of the backlight module provided by the embodiment is shown. Figure 3 Structure schematic view of the backboard 100 provided by the embodiment is shown. Figure 4 Structure schematic view of the light guide plate 200 provided by the embodiment is shown. Figures 2-4 As shown, the backlight module provided by the embodiment includes a backboard 100, a light guide plate 200, a glass 300 and a fixing structure 400. The backboard 100 includes a first bottom plate 110 and a first side plate 120. The first bottom plate 110 includes at least one first edge 111 and a plurality of second edges 112. The first edge 111 and the second edge 112 form a ring shape, and each first edge 111 is vertically provided with a first side plate 120. The light guide plate 200 includes a second bottom plate 210 and a second side plate 220. The second bottom plate 210 is borne on the first bottom plate 110, and the second bottom plate 210 is vertically provided with a second side plate 220 corresponding to the position of the second edge 112. The first side plate 120 and the second side plate 220 jointly bear the glass 300. The fixing structure 400 is configured to wrap the top edge of the glass 300, the side of the glass 300, the side of the backboard 100, the side of the light guide plate 200 and the bottom edge of the backboard 100.

[0052] The backlight module provided by the embodiment cooperates the first side plate 120 of the backboard 100 with the second side plate 220 of the light guide plate 200 to jointly bear the glass 300. Compared with the prior art in which the first side plate is arranged on all sides of the backboard to bear the glass, the backlight module of the embodiment can omit the arrangement of part of the first side plate 120, the middle frame and the glue frame, and the thickness of the second side plate 220 can be further reduced, thereby avoiding the limitation of the material of the backboard 100 and the inability of the entire backlight module to further meet the demand of narrow frame. The arrangement of the fixing structure 400 can realize the overall fixation of the backboard 100, the light guide plate 200 and the glass 300, thereby ensuring the structural stability of the entire backlight module.

[0053] In the embodiment, the number of the first edges 111 is one, and the number of the second edges 112 is three. One first edge 111 and three second edges 112 are sequentially connected to form a ring. Correspondingly, the number of the first side plates 120 is one, and the number of the second side plates 220 is three. The three second side plates 220 are sequentially connected and vertically arranged on the second bottom plate 210, and the top surfaces of the first side plate 120 and the second side plates 220 are flush to jointly bear the glass 300, thereby ensuring the uniformity of the stress of the glass 300. That is, compared with the prior art, the thickness of the three second side plates 220 can be further thinned to meet the demand of narrow frame of the backlight module.

[0054] It should be explained that the first side plate 120 of the back plate 100 is used to fix the light bar assembly (not shown in the figure) to ensure the stable attachment of the light bar assembly. The second bottom plate 210 of the light guide plate 200 forms a light entrance surface 2101 on the side where the second side plate 220 is not arranged, and is arranged opposite and spaced apart from the light bar assembly. The second bottom plate 210 of the light guide plate 200 and the three second side plates 220 form a containing space for bearing the optical film 500. The optical film 500 is used to shape and focus the light emitted by the light bar assembly, and make the light uniformly irradiate on the display panel, thereby improving the brightness and visual experience of the display device. The optical film 500 can be a diffusion sheet, an upper prism sheet, a lower prism sheet, a fogging sheet, etc.

[0055] To realize the connection between the glass 300 and the first side plate 120 and the second side plate 220, in the embodiment, the glass 300 is adhered to the second side plate 220 and the first side plate 120 by the adhesive 600, which is simple in structure, convenient to operate, and stable in connection.

[0056] For the convenience of description, the side of the second side plate 220 for bearing the glass 300 is referred to as the first bearing surface 221, and the side of the first side plate 120 for bearing the glass 300 is referred to as the second bearing surface. In the embodiment, the first bearing surface 221 is the top surface of the second side plate 220, and the second bearing surface is the top surface of the first side plate 120.

[0057] Figure 5 A cross-sectional view of the light guide plate 200 provided in the embodiment is shown. Figure 6 A cross-sectional view of the light guide plate 200 provided in the embodiment is shown. Figure 5 A local enlarged view at A. As shown in Figures 5-6 And combined with Figure 2As shown, the first bearing surface 221 is provided with a groove 2212 for partially accommodating the adhesive 600. The part of the adhesive 600 is accommodated in the groove 2212, and the side of the adhesive 600 away from the first bearing surface 221 is adhered to the glass 300. By providing the groove 2212 for accommodating the adhesive 600, on the one hand, the volume of the adhesive 600 coated on the first bearing surface 221 can be increased, thereby improving the stability of the connection between the glass 300 and the second side plate 220; on the other hand, the provision of the groove 2212 can also increase the friction between the adhesive 600 and the first bearing surface 221, thereby improving the planar attachment and contact adhesion of the adhesive 600 on the first bearing surface 221, to increase the restraint force of the light guide plate 200, thereby avoiding the displacement of the glass 300 due to thermal expansion of the light guide plate 200.

[0058] Specifically, the first bearing surface 221 is provided with a plurality of protruding structures 2211 arranged in an array, and the groove 2212 is formed between adjacent two protruding structures 2211 for facilitating processing. In the embodiment, the protruding structure 2211 can be a multi-pyramid, a multi-prism, or a hemisphere, and the above structures can form the groove 2212 with an expanded opening, so that the adhesive 600 is pressed into the groove 2212 to form a stable connection structure. Exemplarily, the protruding structure 2211 can be a three-pyramid, a four-pyramid, a six-pyramid, a four-prism, etc., which are not limited herein.

[0059] As shown in Figure 2 and Figure 4 , the light emitted by the light bar assembly enters the light guide plate 200 from the light entrance surface 2101, and most of the light will be emitted from the top surface of the second bottom plate 210 to form a surface light source; however, a small part of the light will be emitted from the inner side surface of the second side plate 220, causing light leakage, which will adversely affect the display quality of the display device and reduce the light utilization rate of the entire display device. To solve this problem, the inner side surface of the second side plate 220 is provided with a reflective layer, so that the light reflected to the inner side surface of the second side plate 220 can enter the interior of the light guide plate 200 again, preventing it from being emitted from the inner side surface of the second side plate 220, thereby ensuring the display quality and light utilization rate of the entire display device. The specific material of the reflective layer is not limited in the embodiment, and the reflective layer capable of being applied in the backlight module and reflecting light in the prior art can be used.

[0060] As shown in Figure 2 , in the embodiment, the fixing structure 400 is a mica adhesive, which has good adhesion, strong adhesion, and good light shielding effect and insulation performance on the one hand; on the other hand, the mica adhesive has a relatively thin thickness, which can further meet the demand for narrow frame of the backlight module while ensuring the structural stability of the entire backlight module, thereby improving the user experience.

[0061] Embodiment Two

[0062] This embodiment provides a backlight module, the specific structure of which is substantially the same as that of the backlight module in Embodiment One, except that the included angle between the inner side surface of the second side plate 220 and the second bottom plate 210 is different.

[0063] Figure 7 A cross-sectional view of the light guide plate 200 provided in this embodiment is shown. Figure 7 In combination with Figure 2 , Figure 4 In Embodiment One, the included angle between the inner side surface of the second side plate 220 and the second bottom plate 210 is a right angle; in this embodiment, the included angle between the inner side surface of the second side plate 220 and the second bottom plate 210 is an obtuse angle. That is, the inner side surface of the second side plate 220 is obliquely arranged relative to the top surface of the second bottom plate 210, which arrangement can cause the light rays reflected to the inner side surface of the second side plate 220 in the light guide plate 200 to be totally reflected, so as to reduce the light rays emitted from the inner side surface of the second side plate 220, thereby reducing the light leakage phenomenon and improving the light utilization rate.

[0064] This embodiment does not limit the specific angle of the included angle between the inner side surface of the second side plate 220 and the second bottom plate 210, and the designer can adjust the angle according to actual needs.

[0065] Embodiment Three

[0066] This embodiment provides a backlight module, the specific structure of which is substantially the same as that of the backlight module in Embodiment One, except that the structure of the light guide plate 200 is different.

[0067] Figure 8 A structure diagram of the light guide plate 200 provided in this embodiment is shown. Figure 9 A cross-sectional view of the light guide plate 200 provided in this embodiment is shown. Figures 8-9 In combination with Figure 2As shown, in the embodiment, the inner side of the second side plate 220 is provided with a plug-in slot 222, the lower slot wall of the plug-in slot 222 is flush with the top surface of the first side plate 120, and the glass 300 is inserted into the plug-in slot 222. That is, the lower slot wall of the plug-in slot 222 forms the first bearing surface 221, and the first bearing surface 221 is flush with the second bearing surface to jointly bear the glass 300, thereby ensuring that the glass 300 can be uniformly stressed. With this arrangement, the three second side plates 220 jointly form a structure similar to a drawer, and when assembling, the glass 300 can be directly inserted into the plug-in slot 222 from the side of the second side plate 220 close to the first side plate 120, thereby simplifying the process operation; and when maintenance is required, the glass 300 can be pulled out from the side of the second side plate 220 close to the first side plate 120 without removing the touch screen (not shown in the figure), thereby reducing the workload of the operator and improving the maintenance and replacement efficiency.

[0068] Embodiment Four

[0069] The embodiment provides a backlight module, and the specific structure of the backlight module is substantially the same as that of the backlight module in Embodiment One, except that the number of the first side plate 120 and the second side plate 220 is different.

[0070] Figure 10 A structural schematic diagram of a back plate 100 provided by the embodiment is shown. Figure 11 A structural schematic diagram of a light guide plate 200 provided by the embodiment is shown. As shown in the figure, Figures 10-11 and in combination with Figure 2 As shown, in the embodiment, the number of the first edge 111 is two, and the number of the second edge 112 is two. The two first edges 111 are adjacently arranged and connected, and the two second edges 112 are adjacently arranged and connected. The ends of the two first edges 111 not connected to each other are respectively connected to the two second edges 112, thereby forming a ring shape. Correspondingly, the number of the first side plate 120 is two, and the number of the second side plate 220 is two. The two first side plates 120 are adjacently arranged and connected, and one of the first side plates 120 is used to mount a light bar assembly. The two second side plates 220 are adjacently arranged and connected, and the top surfaces of the first side plate 120 and the second side plate 220 are flush, to jointly bear the glass 300, thereby ensuring the uniformity of stress of the glass 300. That is, compared with the prior art, the thickness of the two second side plates 220 can be further reduced, thereby meeting the demand for narrow frame of the backlight module.

[0071] Embodiment Five

[0072] The embodiment provides a backlight module, and the specific structure of the backlight module is substantially the same as that of the backlight module in Embodiment One, except that the number of the first side plate 120 and the second side plate 220 is different.

[0073] Figure 12 A structural schematic diagram of the backboard 100 provided by the embodiment is shown. Figure 13 A structural schematic diagram of the light guide plate 200 provided by the embodiment is shown. Figures 12-13 And in combination with Figure 2 As shown, in the embodiment, the number of the first edges 111 is two, the number of the second edges 112 is two, the two first edges 111 are oppositely arranged, the two second edges 112 are oppositely arranged, and the two ends of each first edge 111 are respectively connected with the two second edges 112, so as to form a ring shape. Correspondingly, the number of the first side plates 120 is two, and the number of the second side plates 220 is two. The two first side plates 120 are oppositely arranged, one of which is used for mounting the light bar assembly; the two second side plates 220 are oppositely arranged, and the top surfaces of the first side plates 120 and the second side plates 220 are flush, so as to jointly bear the glass 300, thereby ensuring the uniformity of the stress of the glass 300. That is to say, compared with the prior art, the thickness of the two second side plates 220 can be further thinned, thereby meeting the demand of narrow frame of the backlight module.

[0074] Embodiment six

[0075] The embodiment provides a display device, which comprises a display panel and a backlight module. The backlight module is used for supporting the display panel and can provide a backlight source for the display panel. The backlight module can adopt any backlight module in the embodiments one, two, three, four and five. By adopting the backlight module, the demand of narrow frame and thin and light can be further met, and the structural stability of the whole display device can be ensured.

[0076] The basic principle, main features and advantages of the utility model are shown and described above. The skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. A backlight module, characterized in that, The application relates to a backlight module, comprising: a backboard (100) comprising a first bottom plate (110) and a first side plate (120), the first bottom plate (110) comprising at least one first edge (111) and a plurality of second edges (112), the first edge (111) and the second edge (112) forming a ring shape, and each first edge (111) being vertically provided with the first side plate (120); a light guide plate (200) comprising a second bottom plate (210) and a second side plate (220), the second bottom plate (210) being supported on the first bottom plate (110), and the second bottom plate (210) being vertically provided with the second side plate (220) at positions corresponding to the second edges (112); a glass (300), the first side plate (120) and the second side plate (220) jointly supporting the glass (300); a fixing structure (400) wrapping the top edge of the glass (300), the side of the glass (300), the side of the backboard (100), the side of the light guide plate (200) and the bottom edge of the backboard (100).

2. The backlight module of claim 1, wherein, The glass (300) is adhered to the second side plate (220) and the first side plate (120) by an adhesive (600).

3. The backlight module of claim 2, wherein, The second side plate (220) is used for supporting one side of the glass (300) as a first supporting surface (221), and the first supporting surface (221) is provided with a groove (2212) for partially containing the adhesive (600).

4. The backlight module of claim 3, wherein, The first supporting surface (221) is provided with a plurality of protruding structures (2211) arranged in an array, and the groove (2212) is formed between two adjacent protruding structures (2211).

5. The backlight module of claim 4, wherein, The protruding structure (2211) is a multi-pyramid, a multi-pyramid platform or a hemisphere.

6. The backlight module of claim 1, wherein, The inner side of the second side plate (220) is provided with a plug-in groove (222), the lower groove wall of the plug-in groove (222) is flush with the top surface of the first side plate (120), and the glass (300) is inserted into the plug-in groove (222).

7. The backlight module of claim 1, wherein, The inner side of the second side plate (220) is provided with a reflective layer.

8. The backlight module of claim 1, wherein, The included angle between the inner side of the second side plate (220) and the second bottom plate (210) is obtuse.

9. The backlight module according to any one of claims 1-8, wherein, The fixing structure (400) is a mela adhesive.

10. A display device, characterized by comprising: The application further relates to a display panel and a backlight module as claimed in any one of claims 1-9, the backlight module being used for supporting the display panel and providing a backlight source for the display panel.

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