AMOLED display power supply module

Abstract

The utility model discloses an AMOLED display power supply module, comprising an AMOLED display screen, a COF film member and an FPC main board, the FPC main board is connected with the AMOLED display screen through the COF film member, the COF film member is provided with a display screen IC, the FPC main board is provided with a capacitance resistance component unit and a POWER IC, the display screen IC is connected with the display screen IC, and the POWER IC is connected with the display screen IC. A first charge pump unit and a second charge pump unit are arranged in the POWER IC, an AVDD pin, an AVEE pin, a VGH pin and a VGL pin are arranged on the POWER IC, and the AVDD pin, the AVEE pin, the VGH pin and the VGL pin provide voltage for the display screen IC. As the booster circuit is stripped from the display screen IC, the area of the display screen IC can be effectively reduced, the yield of the display screen IC is improved, and the cost of the display screen IC is reduced. Because the POWER IC is additionally provided with AVDD, AVEE, VGH and VGL voltages, the efficiency and the yield are higher, the stability of the voltages is also improved, and changes can be made more flexibly according to different AMOLEDs.

Description

Technical Field

[0001] This utility model relates to an AMOLED module, or more precisely, an AMOLED display power supply module. Background Technology

[0002] AMOLED displays, characterized by vibrant colors, high contrast, and small screen size, are widely used in smartwatches and smart bracelets. As consumer products, smartwatches and smart bracelets have a very large customer market, with monthly shipments reaching millions of dollars. To provide customers with the best display effects and more convenient applications, it is necessary to continuously optimize the peripheral components and power supply voltage requirements of AMOLED modules.

[0003] Currently, the crucial voltages required for AMOLED glass are generated and provided by the display IC, namely AVDD (4.5-6.5V), AVEE (-2-6.3V), VGH (6.6V), and VGL (-6.6V). In addition, the display IC must simultaneously handle AMOLED display and optimize display algorithms, resulting in a massive workload. With the development of AMOLED panels, the market demands increasingly larger AMOLED sizes and higher pixel resolutions. This inevitably requires increasingly higher driving capabilities from the display IC, which could impact its efficiency and thus hinder the development of AMOLED. Therefore, it is necessary to optimize the configuration of AMOLED displays to meet market demands and development needs.

[0004] Chinese patent document CN105845086B discloses an ELVDD power supply method based on an AMOLED display device, characterized by comprising: acquiring data signals of each row of pixels in a frame; comparing the data signals of each row of pixels with grayscale values ​​of at least two levels; determining the grayscale value corresponding to the data signals of each row of pixels and taking the closest target grayscale value as the grayscale level corresponding to the data signals of each row of pixels, wherein the grayscale value corresponding to the data signals of each row of pixels is greater than the target grayscale value, and the target grayscale value belongs to the grayscale values ​​of the at least two levels; taking the maximum grayscale level corresponding to the data signals of each row of pixels as the grayscale level of the frame, and supplying power to the device through the power supply corresponding to the maximum grayscale level. The method drives a frame of image using an luminescent driving voltage ELVDD; compares the data signal of each row of pixels with at least two grayscale values, including: comparing the data signal of each row of pixels with any grayscale value; if the grayscale value corresponding to the data signal of the current row of pixels is greater than or equal to the grayscale value of any level, setting the count value of the counter corresponding to the current row of pixels to 1; if the grayscale value corresponding to the data signal of the current row of pixels is less than the grayscale value of any level, setting the count value of the counter corresponding to the current row of pixels to 0; wherein the counter is used to record the comparison result; the method further includes: performing an OR operation on the recorded result of the counter corresponding to each row of pixels in the frame of image to obtain the maximum grayscale level corresponding to the data signal of each row of pixels. Obtaining the data signal of each row of pixels in a frame of image includes: reading the data signal of each row of pixels in the frame of image from a memory. Comparing the data signal of each row of pixels with at least two grayscale values ​​includes: obtaining a clock cycle signal; and sequentially comparing the data signal of each row of pixels in the frame of image with at least two grayscale values ​​according to the clock cycle signal. The at least two grayscale values ​​include a first grayscale value, a second grayscale value, a third grayscale value, and a fourth grayscale value; wherein the first grayscale value corresponds to a first ELVDD, the second grayscale value corresponds to a second ELVDD, the third grayscale value corresponds to a third ELVDD, and the fourth grayscale value corresponds to a fourth ELVDD; the grayscale value of the first level < the grayscale value of the second level < the grayscale value of the third level < the grayscale value of the fourth level ....This invention provides an ELVDD power supply device based on an AMOLED display device, comprising: an acquisition unit for acquiring data signals of each row of pixels in a frame; a processing unit for comparing the data signals of each row of pixels with at least two grayscale values; the processing unit is further configured to determine the grayscale value corresponding to the data signals of each row of pixels and take the closest target grayscale value as the grayscale level corresponding to the data signals of each row of pixels, wherein the grayscale value corresponding to the data signals of each row of pixels is greater than the target grayscale value, and the target grayscale value belongs to at least two grayscale levels; and an output unit for taking the maximum grayscale level corresponding to the data signals of each row of pixels as the grayscale level of a frame, and driving a frame of the image through the ELVDD corresponding to the maximum grayscale level.

[0005] This patent flexibly adjusts the ELVDD of each frame according to the actual needs of the AMOLED display device, thereby changing the current through the EL device and thus the heat generation of the AMOLED display device. This prevents the EL device from being in a high-heat environment for a long time, increasing its lifespan. However, this structure cannot solve the existing power supply problem. Utility Model Content

[0006] Based on this, it is necessary to address the aforementioned technical problems by providing an AMOLED display power supply module. This module includes an AMOLED display screen, a COF thin-film device, and an FPC motherboard. The FPC motherboard is connected to the AMOLED display screen via the COF thin-film device. The COF thin-film device houses a display IC, and the FPC motherboard houses capacitor and resistor components and a POWER IC. The POWER IC includes a first charge pump unit and a second charge pump unit. The POWER IC has AVDD, AVEE, VGH, and VGL pins, which provide voltage to the display IC. Since the boost circuit is separated from the display IC, the area of ​​the display IC can be effectively reduced, the yield rate can be improved, and thus the cost of the display IC can be lowered. Because the POWER IC provides AVDD, AVEE, VGH, and VGL voltages, efficiency and yield are higher, voltage stability is improved, and it can be more flexibly adapted to different AMOLED displays, meeting the market's development needs for AMOLED.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] An AMOLED display power supply module, characterized in that the AMOLED display power supply module includes an AMOLED display screen, a COF thin film device, and an FPC motherboard, wherein the FPC motherboard is connected to the AMOLED display screen through the COF thin film device.

[0009] The COF thin film device is equipped with a display IC, and the FPC motherboard is equipped with capacitor and resistor components and a POWER IC. The POWER IC is equipped with a first charge pump unit and a second charge pump unit. The POWER IC is equipped with AVDD pin, AVEE pin, VGH pin and VGL pin. The AVDD pin, AVEE pin, VGH pin and VGL pin provide voltage to the display IC.

[0010] In a preferred embodiment of the AMOLED display power supply module provided by this utility model, the voltage of the AVDD pin is 4.5V to 6.5V.

[0011] In a preferred embodiment of the AMOLED display power supply module provided by this utility model, the voltage of the AVEE pin is -2V to 6.3V.

[0012] In a preferred embodiment of the AMOLED display power supply module provided by this utility model, the voltage of the VGH pin is 6.6V.

[0013] In a preferred embodiment of the AMOLED display power supply module provided by this utility model, the voltage of the VGL pin is -6.6V.

[0014] As a preferred embodiment of the AMOLED display power supply module provided by this utility model, the POWER IC further includes a VCC pin, an ELVDD pin, and an ELVSS pin.

[0015] In a preferred embodiment of the AMOLED display power supply module provided by this utility model, the capacitor and resistor component unit is provided with a shield.

[0016] In a preferred embodiment of the AMOLED display power supply module provided by this utility model, the POWER IC is provided with a heat sink.

[0017] In a preferred embodiment of the AMOLED display power supply module provided by this utility model, the heat sink is a copper sheet.

[0018] In a preferred embodiment of the AMOLED display power supply module provided by this utility model, the POWER IC is disposed at the edge of the FPC motherboard.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention provides an AMOLED display power supply module. Because the boost circuit is separated from the display IC, the area of ​​the display IC can be effectively reduced, the yield rate of the display IC can be improved, and thus the cost of the display IC can be lowered. Since the POWER IC provides AVDD, AVEE, VGH, and VGL voltages, efficiency and yield are higher, voltage stability is improved, and it can be more flexibly modified according to different AMOLED models, catering to the market's development needs for AMOLED.

[0021] Additionally, a shielding cover can be provided on the capacitor and resistor component unit. A heat sink, made of copper, is also provided on the POWER IC. Utilizing the heat sink on the POWER IC allows for effective heat dissipation, thereby improving the stability of the AMOLED display power supply module.

[0022] Additionally, the POWER IC can be positioned at the edge of the FPC motherboard. Because the POWER IC is positioned at the edge of the FPC motherboard, heat transfer to the COF thin-film components and AMOLED display can be prevented, further improving the stability of the AMOLED display power supply module. Attached Figure Description

[0023] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the AMOLED display power supply module of this utility model;

[0025] The markings in the diagram are explained as follows: 1. AMOLED display; 2. COF thin film component; 21. Display IC; 3. FPC motherboard; 31. Capacitor and resistor component unit; 32. POWER IC; 321. First charge pump unit; 322. Second charge pump unit; 323. AVDD pin; 324. AVEE pin; 325. VGH pin; 326. VGL pin; 327. VCC pin; 328. LVDD pin; 329. LVSS pin. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0027] As described in the background section, AMOLED technology, with its vibrant display, high contrast, and small screen size, is widely used in smartwatches and smart bracelets. Smartwatches and smart bracelets, as consumer products, have a very large customer market, with monthly shipments reaching millions of dollars. To provide customers with the best display effects and more convenient applications, it is necessary to continuously optimize the peripheral components and power supply voltage requirements of AMOLED modules. Currently, the key voltages required for the glass are generated and provided by the screen IC, namely AVDD (4.5-6.5V), AVEE (-2-6.3V), VGH (6.6V), and VGL (-6.6V). In addition, the screen IC must simultaneously handle the AMOLED screen display and optimize display algorithms, resulting in a huge workload. With the development of AMOLED panels, the market demands increasingly larger AMOLED sizes and higher pixel resolutions, inevitably requiring increasingly higher driving capabilities from the screen IC. This development will affect the efficiency of the screen IC, thus impacting the development momentum of AMOLED. Therefore, it is necessary to optimize the configuration of AMOLED to meet market demands and development.

[0028] To address this technical problem, this invention provides an AMOLED display power supply module, comprising an AMOLED display screen 1, a COF thin film device 2, and an FPC motherboard 3. The FPC motherboard 3 is connected to the AMOLED display screen 1 via the COF thin film device 2. The COF thin film device 2 has a display IC 21, and the FPC motherboard 3 has a capacitor-resistor component unit 31 and a POWER IC 32. The POWER IC 32 contains a first charge pump unit 321 and a second charge pump unit 322. The POWER IC 32 has an AVDD pin 323, an AVEE pin 324, a VGH pin 325, and a VGL pin 326, which provide voltage to the display IC 21.

[0029] Through the above structural design, since the boost circuit is separated from the display IC21, the area of ​​the display IC21 can be effectively reduced, the yield of the display IC21 can be improved, and thus the cost of the display IC21 can be reduced. Because the POWER IC provides AVDD, AVEE, VGH, and VGL voltages, efficiency and yield will be higher, voltage stability will be improved, and it can be more flexibly modified according to different AMOLEDs, catering to the market's development needs for AMOLED.

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] Example 1

[0034] like Figure 1 As shown, the AMOLED display power supply module includes an AMOLED display 1, a COF thin film 2, and an FPC motherboard 3. The FPC motherboard 3 is connected to the AMOLED display 1 through the COF thin film 2.

[0035] The COF thin film component 2 is equipped with a display IC 21, and the FPC motherboard 3 is equipped with a capacitor and resistor component unit 31 and a POWER IC 32. The POWER IC 32 is equipped with a first charge pump unit 321 and a second charge pump unit 322. The POWER IC 32 is equipped with an AVDD pin 323, an AVEE pin 324, a VGH pin 325, and a VGL pin 326. The AVDD pin 323, AVEE pin 324, VGH pin 325, and VGL pin 326 provide voltage to the display IC 21.

[0036] It should be noted that the voltage of the AVDD pin 323 is 4.5V to 6.5V. The voltage of the AVEE pin 324 is -2V to 6.3V.

[0037] Additionally, the voltage at pin VGH 325 is 6.6V. The voltage at pin VGL 326 is -6.6V.

[0038] In addition, the POWER IC32 also includes VCC pin 327, ELVDD pin 328 and ELVSS pin 329.

[0039] The working principle of this embodiment will be described below.

[0040] Since the boost circuit is separated from the display IC21, the area of ​​the display IC21 can be effectively reduced, the yield of the display IC21 can be improved, and thus the cost of the display IC21 can be reduced. Because the POWER IC provides AVDD, AVEE, VGH, and VGL voltages, its efficiency and yield are higher, its voltage stability is improved, and it can be more flexibly modified according to different AMOLEDs, catering to the market's development needs for AMOLED.

[0041] Example 2

[0042] The AMOLED display power supply module provided in Example 1 is further optimized. Specifically, the capacitor and resistor component unit 31 is provided with a shield.

[0043] In addition, the POWER IC32 is equipped with a heat sink. The heat sink is made of copper.

[0044] The working principle of this embodiment will be described below.

[0045] By utilizing the heat sink on the POWER IC32, heat can be effectively dissipated from the POWER IC32, thereby improving the stability of the AMOLED display power supply module.

[0046] Example 3

[0047] The AMOLED display power supply module provided in Embodiment 1 or 2 is further optimized. Specifically, the POWER IC32 is located at the edge of the FPC motherboard 3.

[0048] The working principle of this embodiment will be described below.

[0049] Since the POWER IC32 is located at the edge of the FPC motherboard 3, it can prevent heat from being transferred to the COF thin film 2 and the AMOLED display 1, thereby further improving the stability of the AMOLED display power supply module.

[0050] Terminology

[0051] GOA TIMING refers to the driving timing of AMOLED panels;

[0052] Source driver refers to the driving circuit;

[0053] interface refers to the driver pin interface;

[0054] LDO stands for Low Dropout Voltage Regulator.

[0055] BOOST circuit refers to a boost circuit;

[0056] VIN is the voltage input pin;

[0057] Swire is the pulse pin;

[0058] EN is the voltage enable pin;

[0059] IOVCC is the voltage at the I / O port.

[0060] The terms "coupling" and "coupled" used in the embodiments of this application should be interpreted broadly. For example, they can refer to a physical direct connection or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0061] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0062] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. An AMOLED display power supply module, characterized in that, The AMOLED display power supply module includes an AMOLED display (1), a COF thin film device (2), and an FPC motherboard (3). The FPC motherboard (3) is powered by the COF... The thin film component (2) is connected to the AMOLED display screen (1). The COF thin film device (2) is provided with a display IC (21), and the FPC motherboard (3) is provided with a capacitor and resistor component unit (31) and a POWER IC (32). The POWER IC (32) is provided with a first charge pump unit (321) and a second charge pump unit (322). The POWER IC (32) is provided with AVDD pin (323), AVEE pin (324), VGH pin (325) and VGL pin (326). The AVDD pin (323), AVEE pin (324), VGH pin (325) and VGL pin (326) provide voltage to the display IC (21).

2. The AMOLED display power supply module according to claim 1, characterized in that, The voltage of the AVDD pin (323) is 4.5V to 6.5V.

3. The AMOLED display power supply module according to claim 1, characterized in that, The voltage of the AVEE pin (324) is -2V to 6.3V.

4. The AMOLED display power supply module according to claim 1, characterized in that, The voltage of the VGH pin (325) is 6.6V.

5. The AMOLED display power supply module according to claim 1, characterized in that, The voltage of the VGL pin (326) is -6.6V.

6. The AMOLED display power supply module according to claim 1, characterized in that, The POWER IC (32) also includes a VCC pin (327), an ELVDD pin (328), and an ELVSS pin (329).

7. The AMOLED display power supply module according to claim 1, characterized in that, The capacitor and resistor component unit (31) is provided with a shield.

8. The AMOLED display power supply module according to claim 1, characterized in that, The POWER IC (32) is equipped with a heat sink.

9. The AMOLED display power supply module according to claim 8, characterized in that, The heat sink is made of copper.

10. The AMOLED display power supply module according to claim 1, characterized in that, The POWERIC (32) is located at the edge of the FPC motherboard (3).

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