Backlight FPC for partition display, backlight module and display module

Abstract

The utility model discloses a backlight FPC for subarea display, a backlight module and a display module, and relates to the display module field, the backlight FPC comprises a main body part and a bending part integrally connected with the main body part, the main body part is provided with a plurality of LED pads, the LED pads are divided into at least two groups, the bending part is provided with at least two groups of power supply pads, and the power supply pads are connected with the main body part. Each group of power supply bonding pads is connected with each corresponding group of LED bonding pads through a driving circuit to form a closed loop; the backlight module comprises a backlight FPC and an iron stand, the backlight FPC is arranged on one side of the iron stand, and an LED lamp is installed on an LED bonding pad in the backlight FPC. The display module comprises a backlight module and a display panel, the display panel comprises a first visual area and a second visual area, and the first visual area and the second visual area respectively correspond to at least one group of LED bonding pads; according to the utility model, the partition brightness adjustment is realized, the display contrast is improved, the overall energy consumption is reduced, the heat dissipation of the backlight module is facilitated, the backlight power consumption is greatly reduced, the service time of a battery is prolonged, the endurance is improved, and the product competitiveness is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to display module technical field especially relates to a kind of backlight FPC for partition display, backlight module and display module. BACKGROUND

[0002] One of the mobile phone display screens is liquid crystal display screen, this kind of display module display LCD cannot emit light spontaneously, and provides light source by lower backlight to realize display purpose. The power consumption of this kind of mobile phone display screen is about 100mW, and the power consumption of backlight can reach more than 1000mW due to the large current and large number of LEDs used. Therefore, the power consumption of backlight accounts for a large part of the power consumption of display screen. Effectively reducing the power consumption of backlight during mobile phone use has become one of the main means to improve the endurance of mobile phone.

[0003] At present, the split-screen application function of electronic devices such as mobile phones has been launched for several years, which can display different contents on the screen. Patent application number CN201621384485.X discloses a partitioned backlight module and a display device thereof. The backlight module includes a frame, a first carrier and a second carrier which are parallelly placed in the frame and have equal areas and are independent of each other. The first carrier has a first light guide plate, a first backlight source and a first optical film piece group stacked from bottom to top. The second carrier has a second light guide plate, a second backlight source and a second optical film piece group stacked from bottom to top. The light emitted from the light source assembly of the first carrier and the second carrier forms a first backlight area and a second backlight area. The second backlight source includes a plurality of light shielding parts above the first backlight source. The plurality of light shielding parts are arranged corresponding to the first backlight source and the second backlight source. The boundary line between the first carrier and the second carrier is made of black light-absorbing material, which avoids the appearance of bright lines at the boundary line of the split-screen display light guide plate. The backlight sources in each area are independent of each other and do not interfere with each other, which solves the uneven brightness problem of LED backlight source and brings users a more comfortable and pleasant operation experience. Patent application number 202321388183.X discloses a partitioned backlight. The partitioned backlight specifically includes a display screen and a backlight. The backlight includes a glue frame, a backlight light guide material and a rear iron frame. The glue frame is provided with a blocking wall, which divides the glue frame into a plurality of grooves. Each groove is used to install the display screen. The backlight light guide material is stacked behind the display screen and is adapted to the glue frame. The rear iron frame is connected with the glue frame. The backlight light guide material is arranged in the closed space between the rear iron frame and the display screen. By setting the blocking wall in the glue frame, the glue frame is divided into three grooves, and the grooves are used to install the display screen. That is, a backlight structure is used for multi-screen. In a three-screen structure, the space occupied by the backlight structure is smaller than that of three backlight structures, which is very beneficial to the production of narrow-frame products. At the same time, the material used by the backlight structure is less than that of three backlight structures. This structure helps to save material cost.

[0004] Patent application No. CN201821183269.8 discloses a backlight FPC, a backlight module and a display device, the backlight FPC comprises: an FPC mainboard and a bending part provided on one side of the FPC mainboard; the FPC mainboard comprises a first surface and a second surface, the first surface of the FPC mainboard is used for mounting an LED lamp, and a copper layer is arranged on the periphery of the second surface of the FPC mainboard; a grounding gold finger is arranged on the surface of the same side of the second surface of the FPC mainboard as the bending part, the grounding gold finger is connected with the copper layer on the periphery of the second surface of the FPC mainboard; first and second extension parts are further arranged at both ends of the FPC mainboard respectively, a copper layer is arranged on the surface of the same side of the second surface of the FPC mainboard as the first extension part, and a copper layer is also arranged on the surface of the same side of the second surface of the FPC mainboard as the second extension part, the copper layer of the first extension part and the copper layer of the second extension part are both connected with the copper layer on the periphery of the second surface of the FPC mainboard, and the first and second extension parts are bendable and used for connecting the copper layer of the first extension part and the copper layer of the second extension part with a reflecting sheet respectively, so that the backlight FPC avoids damage of static electricity to the LED, IC and LCD, and effectively improves the service life of the backlight module.

[0005] In the existing backlight FPC, light emitted by each LED on the backlight FPC passes through a light guide plate to change each point light source into a surface light source, and is provided to a display screen, but the existing backlight FPC usually supplies power to all the LEDs in series, the on-off states of the LEDs are consistent, and the LEDs cannot be adjusted in brightness in different zones, all the LED lamps are in a high-current state, the backlight power consumption is increased, the use time of a battery of an electronic product is reduced, the endurance of the electronic product is poor, and the product competitiveness is poor. Therefore, the backlight FPC, the backlight module and the display module for zone display solve the above problems. Invention content

[0006] Therefore, it is necessary to provide a backlight FPC, a backlight module and a display module for zone display in view of the above technical problems, the circuit in each group of LED pads is connected through a power supply pad, so as to independently control the LED lamp on each group of LED pads, realize zone brightness adjustment, improve display contrast, reduce overall energy consumption, help heat dissipation of the backlight module, greatly reduce backlight power consumption, prolong battery use time, improve endurance, and thus improve product competitiveness.

[0007] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A backlight FPC for partition display comprises a main body and a bending part integrally connected with the main body, a surface of the main body is provided with a plurality of LED pads for mounting LED lamps, all the LED pads are divided into at least two groups, and the bending part is provided with at least two groups of power supply pads, each group of the power supply pads is connected with each corresponding group of the LED pads through a driving line to form a closed loop.

[0009] As a preferred embodiment of the backlight FPC for partition display provided by the utility model, the LED pads and the power supply pads are both two groups, and the LED pads in each group of the LED pads are arranged in series.

[0010] As a preferred embodiment of the backlight FPC for partition display provided by the utility model, the LED pads in each group of the LED pads are continuously distributed on the main body, and the two groups of the LED pads are arranged side by side.

[0011] As a preferred embodiment of the backlight FPC for partition display provided by the utility model, the number of the two groups of the LED pads is consistent.

[0012] As a preferred embodiment of the backlight FPC for partition display provided by the utility model, the LED pads on the main body are arranged at equal intervals along the length direction of the main body.

[0013] As a preferred embodiment of the backlight FPC for partition display provided by the utility model, the power supply pad comprises a positive pad A and a negative pad K, and one end of the positive pad A and the negative pad K is connected with the driving line.

[0014] A backlight module comprises the backlight FPC and an iron frame, the inside of the iron frame is sequentially stacked from bottom to top with a reflection film, a light guide plate and an optical film layer, the backlight FPC is arranged on one side of the iron frame, LED lamps are mounted on the LED pads in the backlight FPC, and the LED lamps are arranged at one end of the light guide plate.

[0015] As a preferred embodiment of the backlight module provided by the utility model, the upper side of the optical film layer is provided with a light shielding adhesive layer, and one end surface of the light shielding adhesive layer is adhesively and fixedly connected with the backlight FPC.

[0016] As a preferred embodiment of the backlight module provided by the utility model, the inside of the iron frame is provided with an integral adhesive frame, the backlight FPC is adhesively and fixedly connected with the light guide plate and the adhesive frame through double-sided adhesive, and the LED lamps are arranged between the adhesive frame and the light guide plate.

[0017] As a preferred embodiment of the backlight module provided by the utility model, a surface of the light shielding adhesive layer away from the backlight FPC is bonded with a protective film, one side edge of the protective film is attached to the inner side of the iron stand, and the other side edge of the protective film is flush with the side edge of the backlight FPC close to the light guide plate.

[0018] A display module comprises the backlight module and a display panel, the backlight FPC is located at one end of the display panel, the display panel comprises a first viewing area and a second viewing area, and the first viewing area and the second viewing area correspond to at least one group of LED pads respectively.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The backlight FPC, the backlight module and the display module for partition display provided by the utility model independently control the LED lamps on each group of LED pads by connecting the circuit in each group of LED pads through the power supply pad, realize partition brightness adjustment, improve display contrast, reduce overall energy consumption, and help the backlight module to dissipate heat, when the first viewing area and the second viewing area in the display module use different scenes, different currents can be provided to the two groups of backlight pads, different brightness is provided to the two, for the area that does not need high brightness, different area brightness distinction can be realized by controlling the dark area LED lamp current instead of controlling the dark area pixel switch in the display panel, all the LED does not need to be in a high current state, thereby the backlight power consumption is greatly reduced, the battery use time is prolonged, the endurance is improved, and the product competitiveness is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the scheme in the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0022] Figure 1 The overall structure schematic diagram of the backlight FPC for partition display provided by the utility model is shown in the figure.

[0023] Figure 2 The enlarged schematic diagram of the bending part in the backlight FPC for partition display provided by the utility model is shown in the figure.

[0024] Figure 3 The overall structure schematic diagram of the backlight module provided by the utility model is shown in the figure.

[0025] Figure 4 The overall structure plane schematic diagram of the display module provided by the utility model is shown in the figure.

[0026] The mark in the figure is explained as follows:

[0027] 1, main body part; 2, bending part; 3, LED pad; 4, power supply pad; 41, positive pad A; 42, negative pad K; 5, driving circuit; 6, iron stand; 7, reflecting film; 8, light guide plate; 9, optical film layer; 91, diffusion film; 92, lower light enhancement film; 93, upper light enhancement film; 10, LED lamp; 11, light shielding adhesive layer; 12, double-sided adhesive; 13, protective film; 14, adhesive frame; 15, display panel; 151, first viewing area; 152, second viewing area. DETAILED DESCRIPTION

[0028] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0029] As described in the background, in the existing backlight FPC, the light emitted by each LED on it is converted into a surface light source by a light guide plate, and is provided to the display screen. However, the existing backlight FPC usually has all the LEDs connected in series and supplied with power by one way. These LEDs have consistent on state, and are turned on and off at the same time. It is impossible to adjust the brightness by partition, all the LED lamps are in high current state, which increases the backlight power consumption, reduces the use time of the battery of the electronic product, and the endurance of the electronic product is poor, which is not conducive to product competition.

[0030] In order to solve this technical problem, the present application provides a backlight FPC for partition display, a backlight module and a display module, which are applied to the field of display module.

[0031] Specifically, please refer to Figures 1-2 The backlight FPC for partition display specifically includes a main body part 1 and a bending part 2 integrally connected with the main body part 1. One surface of the main body part 1 is provided with a plurality of LED pads 3. The LED pads 3 are used for installing LED lamps 10. All the LED pads 3 are divided into at least two groups. The bending part 2 is provided with at least two groups of power supply pads 4. Each group of the power supply pads 4 is connected with each corresponding group of LED pads 3 through a driving circuit 5, forming a closed loop.

[0032] Specifically, please refer to Figure 3The backlight module, specifically comprising the backlight FPC and the iron stand 6, the inside of the iron stand 6 is sequentially stacked with a reflecting film 7, a light guide plate 8 and an optical film layer 9 from bottom to top, the backlight FPC is arranged at one side of the iron stand 6, and the LED lamp 10 is arranged at the LED pad 3 in the backlight FPC.

[0033] Specifically, refer to Figure 4 The display module, specifically comprising the backlight module and a display panel 15, the backlight FPC is arranged at one end of the display panel 15, the display panel 15 comprises a first viewing area 151 and a second viewing area 152, and the first viewing area 151 and the second viewing area 152 correspond to at least one group of LED pads 3 respectively.

[0034] The backlight FPC, the backlight module and the display module for partition display, the power supply pad 4 is connected to the circuit in each group of LED pads 3, thereby independently controlling the LED lamp 10 on each group of LED pads 3, realizing partition brightness adjustment, improving display contrast, reducing overall energy consumption, and helping the backlight module to dissipate heat, when the first viewing area 151 and the second viewing area 152 in the display module use different scenes, different currents can be provided to the two groups of backlight pads, different brightnesses are provided to the two groups, for the area that does not need high brightness, different area brightnesses can be distinguished by controlling the dark area LED lamp 10 current instead of controlling the dark area pixel switch in the display panel 15, all the LED does not need to be in a high current state, thereby greatly reducing the backlight power consumption, prolonging the battery use time, improving the endurance, and improving the product competitiveness.

[0035] In order for those skilled in the art to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely in conjunction with the drawings.

[0036] It should be noted that the embodiments in the present application and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0037] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0038] Embodiment one

[0039] Please refer to Figures 1-2The utility model provides a kind of backlight FPC for partition display, it includes main part 1 and the bending part 2 integrally connected with main part 1, the surface of main part 1 is equipped with a plurality of LED pads 3, LED pad 3 is 18 in the example, LED pad 3 is used to install LED lamp 10, LED lamp 10 is 18, all LED pad 3 is divided into two groups, bending part 2 is equipped with two groups of power supply pads 4, every group of power supply pads 4 is connected with corresponding every group of LED pad 3 by drive circuit 5, forms closed loop, LED pad 3 and power supply pad 4 one-to-one correspondence, of course, LED pad 3 and power supply pad 4 are all can be set as multiple groups, according to the number of display partition, specific setting, two groups of LED pad 3 can be passed into different current, provide different brightness for two areas, greatly reduce backlight power consumption.Bending part 2 is equipped with gold finger on the end with power supply pad 4, it is convenient to be inserted with external connector and be connected to power supply.

[0040] In the example, the LED pads 3 in each group of LED pads 3 are connected in series, the positive and negative electrodes of adjacent LED pads 3 are connected by a circuit, the LED pads 3 in each group of LED pads 3 are continuously distributed on the main part 1, and the two groups of LED pads 3 are arranged side by side, facilitating the connection of adjacent LED pads 3, and the two groups of LED pads 3 are distributed on the left and right sides of the main part 1. Of course, in some embodiments, each LED pad 3 in each group of LED pads 3 can also be connected in parallel. According to the specific situation, the number of LED pads 3 in the two groups of LED pads 3 is consistent, each group of LED pads 3 is 9, and all the LED pads 3 on the main part 1 are arranged at equal intervals along the length direction of the main part 1. When the LED lamps 10 on the LED pads 3 emit light, the uniformity of light reception is ensured for the same area and the entire surface of the display screen, and display color difference is avoided.

[0041] Further, the power supply pads 4 include positive pads A41 and negative pads K42. In the example, the two groups of power supply pads 4 are arranged side by side at the end of the bending part 2. Specifically, from left to right, the negative pad K1, the positive pad A1, the negative pad K2, and the positive pad A2 are arranged in sequence at the end of the bending part 2. The negative pad K1 and the positive pad A1 are electrically connected to the left group of LED pads 3 through one drive circuit 5, and the negative pad K2 and the positive pad A2 are electrically connected to the right group of LED pads 3 through another drive circuit 5. The drive circuit 5 is divided into two sections. One end of each section is connected to a positive pad A or a negative pad K, and the other end is connected to two end LED pads 3 in each group of LED pads 3, thereby saving the length of the circuit.

[0042] Embodiment Two

[0043] Please refer to Figure 3The backlight module is provided with the backlight FPC and the iron stand 6 in the first embodiment, the reflection film 7, the light guide plate 8 and the optical film layer 9 are sequentially stacked from bottom to top inside the iron stand 6, the backlight FPC is arranged at one side of the iron stand 6, the LED lamp 10 is arranged on the LED pad 3 in the backlight FPC, the LED lamp 10 is arranged at one end of the light guide plate 8, the upper side of the optical film layer is provided with the light shielding adhesive layer 11, one end surface of the light shielding adhesive layer 11 is fixedly connected with the backlight FPC through adhesion, the inside of the iron stand 6 is provided with the integral adhesive stand 14, the backlight FPC is fixedly connected with the light guide plate 8 and the adhesive stand 14 through the double-sided adhesive 12, the LED lamp 10 is arranged between the adhesive stand 14 and the light guide plate 8, the backlight FPC is fixed, and the surface of the light shielding adhesive layer 11, which is away from the backlight FPC, is adhered with the protective film 13, the protective film 13 is arranged above the backlight FPC, one side edge of the protective film 13 is attached to the inside of the iron stand 6, the other side edge of the protective film 13 is flush with the side edge of the backlight FPC, which is close to the light guide plate 8, the protective film 13 is made of PET material, the light shielding adhesive layer 11 is protected through the protective film 13, and the protective film 13 can be torn off during assembly.

[0044] In the example, the optical film layer includes the diffusion film 91, the lower light enhancement film 92 and the upper light enhancement film 93 which are sequentially stacked from bottom to top, the diffusion film 91 is attached to the upper surface of the light guide plate 8, and one end of the diffusion film 91, which is close to the LED lamp 10, extends out of the lower light enhancement film 92, and the lower light enhancement film 92 is flush with the end of the upper light enhancement film 93.

[0045] Embodiment three

[0046] Please refer to Figure 1 、 4 The display module is provided with the backlight module in the second embodiment and the display panel 15, the display panel 15 is arranged above the backlight module, the display panel 15 is an LCD panel, the backlight FPC is arranged at the bottom end of the display panel 15, the display panel 15 includes the first viewing area 151 and the second viewing area 152, the first viewing area 151 and the second viewing area 152 are distributed on the left and right sides of the display panel 15, the first viewing area 151 and the second viewing area 152 correspond to a group of LED pads 3 respectively, different currents are provided to the LED lamps 10 on the left and right groups of LED pads 3, different brightnesses are provided to the left and right first viewing area 151 and the second viewing area 152, so that the different area brightnesses can be distinguished by controlling the dark area backlight source LED current without controlling the dark area pixel switch in the area which does not need high brightness, it is not necessary that all the LED is in the high current state, so that the backlight power consumption is greatly reduced in this scenario, the battery use time is prolonged, and the mobile phone endurance is improved.

[0047] The working principle of the backlight FPC, the backlight module and the display module for partition display is as follows: the power supply pads 4 are connected to the circuits in each group of LED pads 3 respectively, so that the LED lamps 10 on each group of LED pads 3 are independently controlled, the partition brightness adjustment is realized, the display contrast is improved, the overall energy consumption is reduced, and the backlight module is helped to dissipate heat; when the first visual area 151 and the second visual area 152 in the display module use different scenes, different currents can be provided to the two groups of backlight pads, different brightnesses are provided to the two, for the area which does not need high brightness, the different area brightnesses can be distinguished by controlling the current of the dark area LED lamp 10 instead of controlling the dark area pixel switch in the display panel 15, all the LED does not need to be in the high current state, so that the backlight power consumption is greatly reduced, the battery use time is prolonged, the endurance is improved, and the product competitiveness is improved.

[0048] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct connection, also can indirectly connect through intermediate medium, can be the communication of two element internals or the interaction of two elements, unless another definite limitation.For ordinary skilled in the art, the above terms can be understood according to the specific meaning of the utility model.

[0049] Obviously, the above described embodiments are only part of the embodiments of the utility model, not all the embodiments, and the preferred embodiments of the utility model are given in the drawings, but do not limit the patent range of the utility model.The utility model can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.Although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing specific embodiments can be modified, or some technical features can be replaced equivalently.The equivalent structure made by using the contents of the utility model specification and drawings, direct or indirect application in other related technical fields, are also within the patent protection range of the utility model.

Claims

1. A backlight FPC for zoned display, comprising a main body and a bent portion integrally connected to the main body, characterized in that, The main body has a plurality of LED pads on one surface, which are used to mount LED lights. All the LED pads are divided into at least two groups. The bent part has at least two groups of power supply pads. Each group of power supply pads is connected to each corresponding group of LED pads through a drive circuit to form a closed loop.

2. A backlight FPC for zoned display according to claim 1, characterized in that, The LED pads and power supply pads are in two groups, with the LED pads in each group connected in series.

3. A backlight FPC for zoned display according to claim 2, characterized in that, The LED pads in each group of LED pads are continuously distributed on the main body, and the two groups of LED pads are arranged side by side, with the same number of LED pads in both groups.

4. A backlight FPC for zoned display according to claim 1, characterized in that, The LED pads on the main body are evenly spaced along the length of the main body.

5. A backlight FPC for zoned display according to claim 1, characterized in that, The power supply pads include a positive pad A and a negative pad K, with one end of the positive pad A and the negative pad K connected to the drive circuit.

6. A backlight module comprising a metal frame, characterized in that, It also includes the backlight FPC as described in any one of claims 1-5, wherein a reflective film, a light guide plate, and an optical film layer are stacked sequentially from bottom to top inside the iron frame, the backlight FPC is located on one side of the iron frame and an LED light is installed on the LED pad in the backlight FPC, and the LED light is located at one end of the light guide plate.

7. A backlight module according to claim 6, characterized in that, The upper side of the optical film is provided with a light-shielding adhesive layer, and one end of the light-shielding adhesive layer is bonded and fixedly connected to the backlight FPC.

8. A backlight module according to claim 7, characterized in that, A protective film is adhered to the surface of the light-shielding adhesive layer that is away from the backlight FPC. One side of the protective film is attached to the inner side of the iron frame, and the other side of the protective film is flush with the side of the backlight FPC that is close to the light guide plate.

9. A backlight module according to claim 6, characterized in that, The inner side of the iron frame is provided with an integrated rubber frame. The backlight FPC is bonded and fixed to the light guide plate and the rubber frame respectively by double-sided adhesive. The LED light is located between the rubber frame and the light guide plate.

10. A display module, characterized in that, Includes the backlight module and display panel as described in any one of claims 6-9, wherein the backlight FPC is located at one end of the display panel, and the display panel includes a first viewing area and a second viewing area, wherein the first viewing area and the second viewing area respectively correspond to at least one set of LED pads.

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