Patent Grant
11990088
The present disclosure relates to the technical field of display, in particular to a display driving device and an electronic apparatus.
With the continuous development of science and technology, an increasing number of electronic apparatuses with a display function are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and have become an indispensable tool for people nowadays. A display panel is an important part of an electronic apparatus to execute the display function. However, for an existing display panel, due to different driving capabilities for different regions of the display panel, the brightness of different regions of the display panel is not uniform. With the increasing size of the display panel, the brightness difference between the different regions of the display panel is greater, and consequently the display effect is worse.
In view of the foregoing, the present disclosure provides a display driving device, comprising:
In a possible implementation, the power supply module comprises:
In a possible implementation, the power supply module further comprises:
In a possible implementation, the voltage regulation unit comprises a first operational amplifier, a first resistor, and a second resistor, wherein:
In a possible implementation, the voltage regulation unit further comprises a second operational amplifier, a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor, wherein:
In a possible implementation, the first voltage conversion unit is further configured to output the first reference voltage and/or the second reference voltage.
In a possible implementation, the power supply module further comprises:
In a possible implementation, the power supply module comprises:
In a possible implementation, the power supply module further comprises:
In a possible implementation, the first voltage conversion unit is further configured to acquire a first terminal voltage of each target display region, and use the first terminal voltage to control a corresponding fourth voltage conversion unit to output the first regulated voltage; and/or
In a possible implementation, the first power supply voltage is a positive voltage, and the second power supply voltage is a negative voltage.
In a possible implementation, the display panel comprises any one or more of a light-emitting diode (LED), a mini light-emitting diode (MiniLED), a micro light-emitting diode (Micro LED), and an organic light-emitting diode (OLED).
According to another aspect of the present disclosure, there is provided an electronic apparatus, comprising the display driving device.
In a possible implementation, the electronic apparatus comprises a display, a smart phone, or a portable device.
With the above device, in the embodiments of the present disclosure, a first regulated voltage and/or a second regulated voltage are/is output for a target display region from which a distance to a power interface is greater than a preset distance, to regulate a first terminal voltage of a light-emitting transistor in the target display region via the first regulated voltage and/or regulate a second terminal voltage via the second regulated voltage, which enables uniform display brightness of the respective regions of a display panel and thus improves the display effect.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the drawings.
The drawings, which are included in and constitute a part of the description, illustrate exemplary embodiments, features and aspects of the present disclosure together with the description, and serve to explain the principles of the present disclosure.
Various exemplary embodiments, features and aspects of the present disclosure will be explained in detail below with reference to the drawings. In the drawings, the same reference signs denote elements with the same or similar functions. Although various aspects of the embodiments are shown in the drawings, unless otherwise specified, the drawings are not necessarily drawn to scale.
The word “exemplary” used here means “serving as an example, embodiment or illustration”. Any embodiment described here as “exemplary” is not necessarily to be interpreted as superior to or better than other embodiments.
Furthermore, for a better explanation of the present disclosure, numerous specific details are given in the following detailed description of the embodiments. Those skilled in the art should understand that the present disclosure may also be implemented without certain specific details. In some embodiments, methods, means, elements and circuits that are well known to those skilled in the art are not described in detail in order to highlight the main idea of the present disclosure.
Reference is made to
As shown in
With the above device, in the embodiments of the present disclosure, a first regulated voltage and/or a second regulated voltage are/is output for a target display region from which a distance to a power interface is greater than a preset distance, to regulate a first terminal voltage of a light-emitting transistor in the target display region via the first regulated voltage and/or to regulate a second terminal voltage via the second regulated voltage, which enables uniform display brightness of the respective regions of a display panel and thus improves the display effect.
The device in the embodiments of the present disclosure can be various electronic devices with a display function, such as a user equipment (UE), a mobile station (MS), and a mobile terminal (MT), and is a device that provides voice and/or data connectivity to users, such as a handheld device with a wireless connection function and a vehicle-mounted device. At present, some examples of terminals are as follows: mobile phones, tablet computers, laptop computers, palm computers, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in autonomous driving, wireless terminals in remote medical surgeries, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, wireless terminals in car networking and so on.
In a possible implementation, the display panel comprises any one or more of an LED, a MiniLED, a Micro LED, and an OLED.
In an example, the display transistor in each display region of the display panel usually receives the first power supply voltage and the second power supply voltage via the power interface to acquire driving capability. With an increase in the distance from the power interface, the driving capability of a display region of the display panel far away from the power interface will become lower and lower, that is, there will be a voltage difference between a region close to the power interface and a region far away from the power interface, which will cause the display brightness of a display region far away from the power interface to be lower than that of a display region close to the power interface.
As the size of the display panel gets larger and larger, the wiring on the printed circuit board assembly (PCBA) in the display panel will cause an increase in resistance at the distal end (the display region far away from the power interface), so the voltage at the distal end will be notably lower than that at the proximal end (the display region close to the power interface). For example, assuming that the power interface of the display panel is in the upper left corner shown in
In view of the foregoing, according to an embodiment of the present disclosure, the display panel is divided into a plurality of regions, and based on distances between the respective regions and the power interface, a first regulated voltage and/or a second regulated voltage are/is output for a target display region from which a distance to the power interface is greater than a preset distance, to regulate a first terminal voltage of the light-emitting transistor in the target display region via the first regulated voltage and/or regulate a second terminal voltage via the second regulated voltage, such that the display brightness of the regions of the display panel can be uniform and the display effect can be improved.
In a possible implementation, when the display panel is divided into regions, each region may include the same number of display transistors. In other embodiments, the number of display transistors in each region may be different.
In an example, each display region may include a plurality of display transistors, and by collectively regulating the driving voltages of the plurality of display transistors in a target display region from which a distance to the power interface is greater than a preset distance, the regulation efficiency is improved.
In an example, each display region may include one display transistor, and by separately regulating the driving voltage of the display transistor in a target display region from which a distance to the power interface is greater than a preset distance, the regulation accuracy is improved.
In a possible implementation, the first power supply voltage is a positive voltage, and the second power supply voltage is a negative voltage.
In an example, the power supply module may regulate a first terminal voltage or a second terminal voltage of a target display region, or simultaneously regulate a first terminal voltage and a second terminal voltage of a target display region, so as to regulate the driving voltage of the display transistor in the target display region.
Reference is made to
In a possible implementation, as shown in
In an example, the first voltage conversion unit 110 may comprise an AC-DC converter and a DC-DC converter, which can convert an input alternating current into a desired direct current or convert an input direct current into a desired direct current.
In a possible implementation, as shown in
In an example, the first reference voltage and the second reference voltage may be set in advance. For example, a corresponding reference voltage may be set based on a magnitude of the regulated voltage required by each region of the display panel. There certainly can be multiple kinds of sources of the reference voltage.
In a possible implementation, the first voltage conversion unit 110 may be further configured to output the first reference voltage and/or the second reference voltage.
In an example, the first voltage conversion unit 110 may generate the first reference voltage and/or the second reference voltage based on voltage parameters set in advance, and input the first reference voltage and/or the second reference voltage into the voltage regulation unit 120.
In a possible implementation, as shown in
In an example, the second voltage conversion unit 130 may comprise an AC-DC converter and a DC-DC converter, which can convert an input alternating current into a desired direct current or convert an input direct current into a desired direct current.
In an example, the second voltage conversion unit 130 may generate the first reference voltage and/or the second reference voltage based on voltage parameters set in advance, and input the first reference voltage and/or the second reference voltage into the voltage regulation unit 120.
In an example, the number of the voltage regulation units 120 may correspond to the number of the display regions to be regulated, or may be set to be greater than or equal to the total number of the display regions in the display panel, which is not limited by the embodiments of the present disclosure.
In an example, the respective voltage regulation units 120 may be distributed on the PCBA of the display panel, and may be arranged in specific positions of the PCBA as required. For example, if the power interface is at the upper left end of the PCBA, a plurality of voltage regulation units may be arranged in sequence from left to right or from top to bottom. The specific positions where the voltage regulation units 120 are arranged on the display panel are not limited by the embodiments of the present disclosure.
In a possible implementation, as shown in
In an example, magnitudes of the first resistor R1 and the second resistor R2 as well as parameters of the first operational amplifier can be determined based on a magnitude of the regulated voltage required by each target display region, such that the first regulated voltage is generated by using the first reference voltage to regulate the first power supply voltage of the corresponding target display region.
In a possible implementation, as shown in
In an example, magnitudes of the third resistor R3, the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 as well as parameters of the second operational amplifier can be determined based on a magnitude of the regulated voltage required by each target display region, such that the second regulated voltage is generated by using the second reference voltage to regulate the second power supply voltage of the corresponding target display region.
In an example, as shown in
The foregoing describes the implementations of the power supply voltages of the target display region of the display panel. However, the present disclosure is not limited to the above implementations, and other possible implementations are described below.
Reference is made to
In a possible implementation, as shown in
In an example, the third voltage conversion unit 140 may comprise an AC-DC converter and a DC-DC converter, which can convert an input alternating current into a desired direct current or convert an input direct current into a desired direct current.
Each third voltage conversion unit in the embodiment of the present disclosure determines the corresponding regulated voltage by acquiring feedback voltage information (the first terminal voltage and the second terminal voltage) of the corresponding target display region, which can achieve accurate regulation of the driving voltage of each target display region. In addition, the regulation made by the independent third voltage conversion unit to the corresponding target display region has high pertinence, and is more accurate, fast, and efficient.
Reference is made to
In a possible implementation, as shown in
In an example, the fourth voltage conversion unit 150 may comprise an AC-DC converter and a DC-DC converter, which can convert an input alternating current into a desired direct current or convert an input direct current into a desired direct current.
In an example, the first voltage conversion unit 110 may serve as a master to control a plurality of fourth voltage conversion units 150 which serve as slaves.
In an example, the first voltage conversion unit 110 may also realize the capability of synchronously controlling the magnitude of the output current. For example, if it is required that the current and the voltage of each of the fourth voltage conversion units 150 are controlled to be consistent in the whole application process, the first voltage conversion unit 110 can perform such control on the fourth voltage conversion units 150 in a unified manner. Theoretically, each region of the display panel should have consistent voltage and current, so specific values may be set by internal registers, or special values may be set based on the characteristics of the panel, and transmitted to the fourth voltage conversion unit 150 through communication protocols such as I2C or ISP.
In a possible implementation, the first voltage conversion unit is further configured to acquire a first terminal voltage of each target display region, and control a corresponding fourth voltage conversion unit to output the first regulated voltage by using the first terminal voltage; and/or
The first voltage conversion unit not only can control each fourth voltage conversion unit to output the regulated voltage or regulated current through preset voltage parameters or current parameters, but also can acquire the first terminal voltage, the second terminal voltage, or information of the current in the target display region through feedback, to control each fourth voltage conversion unit to output the regulated voltage or regulated current based on the acquired feedback information.
By the above means, the embodiments of the present disclosure can quickly and accurately regulate the power supply voltage of each display region by configuring the first voltage conversion unit and the fourth voltage conversion unit to be in a master-slave working mode. Each implementation of the present disclosure can obviously improve the uniformity of brightness of the panel, and this effect will be more obvious especially with the increase of panel size.
Although the embodiments of the present disclosure have been described above, it will be appreciated that the above descriptions are merely exemplary, but not exhaustive; and that the disclosed embodiments are not limiting. A number of variations and modifications may occur to one skilled in the art without departing from the scopes and spirits of the described embodiments. The terms in the present disclosure are selected to provide the best explanation on the principles and practical applications of the embodiments and the technical improvements to the arts on market, or to make the embodiments described herein understandable to one skilled in the art.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202011127205.8 | Oct 2020 | CN | national |
The present disclosure is a continuation of and claims priority under 35 U.S.C. 120 to PCT Application No. PCT/CN2021/091059, filed on Apr. 29, 2021, which claims priority to Chinese Patent Application No. 202011127205.8, filed with National Intellectual Property Administration, PRC, on Oct. 20, 2020, entitled “DISPLAY DRIVE APPARATUS AND ELECTRONIC DEVICE”. All the above referenced priority documents are incorporated herein by reference in their entireties.
| Number | Name | Date | Kind |
|---|---|---|---|
| 10643529 | Chien | May 2020 | B1 |
| 20110018787 | Nakamura et al. | Jan 2011 | A1 |
| 20120280970 | Kato | Nov 2012 | A1 |
| Number | Date | Country |
|---|---|---|
| 1987711 | Jun 2007 | CN |
| 101312022 | Nov 2008 | CN |
| 103137072 | Jun 2013 | CN |
| 104809988 | Jul 2015 | CN |
| 105468063 | Apr 2016 | CN |
| 105761679 | Jul 2016 | CN |
| 105825816 | Aug 2016 | CN |
| 106128359 | Nov 2016 | CN |
| 205680029 | Nov 2016 | CN |
| 106816137 | Jun 2017 | CN |
| 107994056 | May 2018 | CN |
| 108269527 | Jul 2018 | CN |
| 110021267 | Jul 2019 | CN |
| 110444164 | Nov 2019 | CN |
| 111341270 | Jun 2020 | CN |
| 111383603 | Jul 2020 | CN |
| 112164368 | Jan 2021 | CN |
| 20190023859 | Mar 2019 | KR |
| 2020118833 | Jun 2020 | WO |
| 2022083099 | Apr 2022 | WO |
| Entry |
|---|
| International Search Report dated Aug. 2, 2021, in PCT/CN2021/091059, 3 pgs. |
| Number | Date | Country | |
|---|---|---|---|
| 20230267879 A1 | Aug 2023 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2021/091059 | Apr 2021 | US |
| Child | 18301319 | US |
