Silicon-based OLED display control system and display

Abstract

The utility model discloses a silicon-based OLED display control system and a display, and belongs to the technical field of silicon-based OLED display. The system comprises a main control chip, a screen driving device, an OLED display screen and a voltage sampling circuit, wherein the main control chip is connected with the screen driving device; the screen driving device is connected with the OLED display screen; and the screen driving device is also connected with the main control chip through the voltage sampling circuit. According to the utility model, the brightness adjustment of the silicon-based OLED display screen is realized, and the power consumption is reduced under the condition of low brightness.

Description

TECHNICAL FIELD

[0001] The utility model belongs to silicon-based OLED display technical field, specifically, the utility model relates to a kind of silicon-based OLED display control system and display. BACKGROUND

[0002] In prior art, in order to ensure the display effect of silicon-based OLED display screen, the brightness of silicon-based OLED display screen is usually adjusted by gamma voltage.

[0003] For example, the publication number CN113763905A, the publication date is 2021-12-07, and the patent name is the control method of the display device and the display literature: the application provides a kind of display device and the control method of display. The display device includes mainboard, screen driving board and display screen, the refresh rate corresponding to the video data to be displayed is obtained by mainboard, and a group of gamma voltage is determined according to the refresh rate by mainboard, and then a group of gamma voltage is sent to screen driving board, so that screen driving board drives display screen to display video data according to a group of gamma voltage and received display signal, so that the brightness of the picture displayed by display screen is stable, and the display picture is avoided to be bright and dark suddenly.

[0004] However, in prior art, gamma voltage and OLED voltage across two terminals are usually converted from constant voltage input by external, different gamma voltage and OLED voltage across two terminals correspond to different brightness. However, in order to ensure the range of brightness adjustment, the constant voltage value is usually large for low brightness screen, which leads to large power consumption of the overall product when the screen is low brightness, and further leads to the increase of heat and temperature of the overall product, which is not conducive to product safety.

[0005] Therefore, the present application provides a kind of silicon-based OLED display control system and display. UTILITY MODEL CONTENT

[0006] The utility model aims at overcoming the shortcomings of prior art, and proposes to achieve the following purposes: while realizing the brightness adjustment of silicon-based OLED display screen, the power consumption is reduced under low brightness.

[0007] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a silicon-based OLED display control system, the system includes main control chip, screen driving device, OLED display screen, voltage sampling circuit, wherein: the main control chip is connected with the screen driving device;The screen driving device is connected with the OLED display screen;The screen driving device is further connected with the main control chip through the voltage sampling circuit.

[0008] Preferably, the master chip is configured to provide constant analog positive voltage and analog negative voltage to the screen driving device, and to send screen brightness requirement converted into control parameters to the screen driving device.

[0009] The screen driving device is configured to convert the constant analog positive voltage and analog negative voltage into corresponding OLED display screen driving voltage according to the control parameters.

[0010] The OLED display screen is configured to adjust OLED display brightness according to the driving voltage.

[0011] The voltage sampling circuit is configured to sample the driving voltage, and the sampled voltage is fed back to the master chip; the master chip adjusts the constant analog positive voltage and analog negative voltage value according to the sampled voltage.

[0012] Preferably, the screen driving device comprises a first low dropout linear regulator and a second low dropout linear regulator, the voltage input end and the reference voltage input end of the first and second low dropout linear regulators are connected with the master chip, and the input end of the first and second low dropout linear regulators is connected with the OLED display screen; the first low dropout linear regulator is configured to convert the constant analog positive voltage into gamma voltage and OLED anode voltage according to the control parameters; the second low dropout linear regulator is configured to convert the constant analog negative voltage into OLED cathode voltage according to the control parameters; the gamma voltage, OLED anode voltage, and OLED cathode voltage jointly constitute the driving voltage output to the OLED display screen.

[0013] Preferably, the screen driving device comprises a DCDC converter, the DCDC converter is connected with the master chip and the OLED display screen respectively; the DCDC converter is configured to convert the constant analog positive voltage and analog negative voltage into driving voltage output to the OLED display screen according to the control parameters.

[0014] Preferably, the system comprises a memory, the memory is connected with the master chip, and the memory pre-stores conversion relationship data of screen brightness and control parameters; the master chip selects corresponding control parameters from the relationship data according to screen brightness requirement and outputs to the screen driving device.

[0015] Preferably, the master chip comprises a microcontroller MCU.

[0016] Meanwhile, the present application also proposes a display according to the above-mentioned silicon-based OLED display control system.

[0017] The technical effect of the utility model discloses: in realizing the luminance adjustment, in the case of low brightness, the constant analog positive voltage and negative voltage of the input screen drive device of main control chip, the utility model discloses a voltage sampling circuit is set up to gather the drive voltage of screen drive device output, and thus the main control chip reduces the size of analog positive voltage and analog negative voltage according to the drive voltage in real time, finally realizes the purpose of reducing the power consumption. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a silicon-based OLED display control system structure diagram of the utility model embodiment. DETAILED DESCRIPTION

[0019] The specific embodiments of the utility model are further explained in detail by comparing the drawings and the description of the embodiments, the purpose is to help the technical personnel in the field to have more complete, accurate and thorough understanding to the utility model concept, technical scheme of the utility model, and help its implementation. It needs to be noted that the "first", "second" and other words in the application are only convenient for the description of technical scheme to distinguish different components, and do not limit the application. In order to make the technical scheme of the utility model more clear, the utility model is explained and described by the following embodiments.

[0020] Embodiment one:

[0021] As Figure 1 The embodiment provides a silicon-based OLED display control system, and the system comprises a main control chip, a screen drive device, an OLED display screen and a voltage sampling circuit, wherein: the main control chip is connected with the screen drive device; the screen drive device is connected with the OLED display screen; and the screen drive device is also connected with the main control chip through the voltage sampling circuit.

[0022] The main control chip is used for providing constant analog positive voltage and analog negative voltage to the screen drive device, and simultaneously sending screen brightness demand converted into control parameters to the screen drive device.

[0023] The screen drive device is used for converting the constant analog positive voltage and analog negative voltage into corresponding OLED display screen drive voltage according to the control parameters.

[0024] The OLED display screen is used for adjusting OLED display brightness according to the drive voltage.

[0025] The voltage sampling circuit is used for sampling the drive voltage, and the sampling voltage is fed back to the main control chip; and the main control chip adjusts the constant analog positive voltage and analog negative voltage value according to the sampling voltage.

[0026] Specifically, the screen driving device of the embodiment comprises a first low-dropout linear regulator and a second low-dropout linear regulator, the voltage input end and the reference voltage input end of the first and second low-dropout linear regulators are connected with the master control chip, and the input end of the first and second low-dropout linear regulators is connected with the OLED display screen.

[0027] The voltage input end of the first low-dropout linear regulator inputs a constant analog positive voltage, and the first low-dropout linear regulator is used to convert the constant analog positive voltage into a gamma voltage and an OLED anode voltage according to the control parameter; the voltage input end of the second low-dropout linear regulator inputs a constant analog negative voltage, and the second low-dropout linear regulator is used to convert the constant analog negative voltage into an OLED cathode voltage according to the control parameter; the gamma voltage, the OLED anode voltage, and the OLED cathode voltage jointly constitute a driving voltage output to the OLED display screen.

[0028] The principle of the low-dropout linear regulator is that there is an error amplifier inside it, which samples the output voltage and compares it with the input reference voltage. When the reference voltage is constant, the output voltage will change accordingly when the input voltage changes or the output load current changes. This change is fed back to the error amplifier, which adjusts the impedance (transistor conduction degree) of an adjusting tube (usually a power transistor) connected in series between the input and output, thereby adjusting the output voltage, so that the output voltage remains stable. On this basis, by inputting different reference voltages through the master control chip, the output voltage of the low-dropout linear regulator can be adjusted. According to this point, the screen brightness requirement can be converted into the corresponding reference voltage, so as to adjust the reference voltage and adjust the screen brightness. For example, when the screen needs to display a high-brightness picture, the master control chip can output a higher reference voltage value to the low-dropout linear regulator, instructing the low-dropout linear regulator to increase the driving voltage.

[0029] Correspondingly, the system of the embodiment comprises a memory connected with the master control chip, and the memory has pre-stored screen brightness and control parameter conversion relationship data. In the embodiment, the control parameter is the reference voltage of the low-dropout linear regulator, and the screen brightness and reference voltage conversion relationship data can be obtained through a large number of experiments in advance. Therefore, the master control chip can select the corresponding control parameter according to the screen brightness requirement from the relationship data and output it to the screen driving device, and the screen driving device generates a gamma voltage, an OLED anode voltage, and an OLED cathode voltage to drive the OLED display screen.

[0030] In the embodiment, the gamma voltage, the OLED anode voltage, and the OLED cathode voltage are also fed back to the master control chip through the voltage sampling circuit. When the screen is in low brightness, the original analog positive and negative voltage values are usually large, and therefore the master control chip reduces the constant analog positive and negative voltage values according to the sampling voltage to reduce power consumption. The driving voltage (including the gamma voltage, the OLED anode voltage, and the OLED cathode voltage) when the screen is in low brightness is usually small, and the master control chip can determine whether the current is in low brightness by setting a voltage threshold (for example, each driving voltage less than or equal to 6V is considered as low brightness).

[0031] Generally, the analog positive voltage needs to be greater than the maximum value of the gamma voltage and the OLED anode voltage by more than 1V, and the analog negative voltage value needs to be greater than the OLED cathode voltage by more than 1V, and the specific setting value depends on the product characteristics. For example, in the embodiment, when the gamma voltage is read as 4.5V-6V, the anode voltage is read as 5.5V-6V, and the cathode voltage is read as 4V-5V, the master control chip inputs an analog positive voltage of 7V and an analog negative voltage of 6V; when the gamma voltage is read as 0V-1.5V, the anode voltage is read as 4V-4.5V, and the cathode voltage is read as 0V-1V, the master control chip inputs an analog positive voltage of 5.5V and an analog negative voltage of 2V.

[0032] After adjusting the analog positive voltage and the analog negative voltage, the driving voltage input to the OLED display screen remains stable due to the presence of the low-dropout linear regulator, that is, the brightness of the OLED display screen does not change, and the power consumption is reduced by adjusting the analog positive voltage and the analog negative voltage while the brightness of the OLED display screen remains unchanged.

[0033] In the embodiment, the master control chip is a microcontroller MCU, which has the advantages of small size, high control efficiency, strong data processing capability, and high integration, can improve the working efficiency of the overall system, and simplify the system architecture and reduce the cost.

[0034] Embodiment Two

[0035] Based on the embodiment one, the difference between embodiment two and embodiment one is that the screen driving device of the embodiment includes a DCDC converter, which is connected with the master control chip and the OLED display screen respectively; the DCDC converter is used to convert the constant analog positive and negative voltage into driving voltage according to the control parameter output by the master control chip and output to the OLED display screen.

[0036] Compared to DC-DC converters, the input analog positive and negative voltages can be converted into driving voltages suitable for OLED displays by adjusting parameters such as their duty cycle. Correspondingly, the system in this embodiment includes a memory connected to the main control chip. The memory pre-stores data relating screen brightness to the DC-DC converter's duty cycle. This data can be obtained in advance through numerous experiments under different analog positive and negative voltage conditions. The main control chip selects the corresponding duty cycle from the data based on the screen brightness requirement and outputs it to the screen driving device. The screen driving device then outputs the corresponding driving voltage to ensure the OLED display meets the required screen brightness. The driving voltage is also fed back to the main control chip via a voltage sampling circuit. The main control chip then adjusts the constant analog positive and negative voltage values ​​based on the sampled voltage to reduce power consumption, using the same method as in Embodiment 1.

[0037] After adjusting the analog positive and negative voltages, the main control chip can select the corresponding duty cycle from the relational data based on the current analog positive and negative voltages and the screen brightness requirements, and output it to the screen driving device to ensure that the brightness remains unchanged.

[0038] In addition, this application also proposes a display based on the aforementioned silicon-based OLED display control system, the display including the silicon-based OLED display control system.

[0039] In summary, this invention adjusts the OLED display to achieve the required brightness while simultaneously collecting the driving voltage output by the screen driving device through a voltage sampling circuit. Thus, when the screen brightness is low, the main control chip can reduce the simulated positive voltage and simulated negative voltage in real time according to the driving voltage, ultimately achieving the purpose of reducing power consumption. At the same time, it can also reduce the heat generation and temperature of the product.

[0040] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A silicon-based OLED display control system, characterized in that: The system includes a main control chip, a screen driver, an OLED display, and a voltage sampling circuit, wherein: the main control chip is connected to the screen driver; the screen driver is connected to the OLED display; and the screen driver is also connected to the main control chip through the voltage sampling circuit.

2. The silicon-based OLED display control system according to claim 1, characterized in that: The main control chip is used to provide constant analog positive voltage and analog negative voltage to the screen driver device, and at the same time convert the screen brightness requirement into control parameters and send them to the screen driver device. The screen driving device is used to convert the constant analog positive voltage and analog negative voltage into the corresponding OLED display driving voltage according to the control parameters; The OLED display screen is used to adjust the OLED display brightness according to the driving voltage; The voltage sampling circuit is used to sample the driving voltage, and the sampled voltage is fed back to the main control chip; the main control chip adjusts the constant analog positive voltage and analog negative voltage values ​​according to the sampled voltage.

3. The silicon-based OLED display control system according to claim 2, characterized in that: The screen driving device includes a first low-dropout linear regulator and a second low-dropout linear regulator. The voltage input terminal and reference voltage input terminal of the first and second low-dropout linear regulators are both connected to the main control chip, and the input terminals of the first and second low-dropout linear regulators are both connected to the OLED display screen. The first low-dropout linear regulator is used to convert the constant analog positive voltage into a gamma voltage and an OLED anode voltage according to the control parameters. The second low-dropout linear regulator is used to convert the constant analog negative voltage into an OLED cathode voltage according to the control parameters. The gamma voltage, OLED anode voltage, and OLED cathode voltage together form a driving voltage output to the OLED display screen.

4. A silicon-based OLED display control system according to claim 2, characterized in that: The screen driving device includes a DC-DC converter, which is connected to the main control chip and the OLED display screen respectively. The DC-DC converter is used to convert the constant analog positive voltage and analog negative voltage into a driving voltage and output it to the OLED display screen according to the control parameters.

5. A silicon-based OLED display control system according to claim 1, characterized in that: The system includes a memory connected to the main control chip. The memory pre-stores data on the conversion relationship between screen brightness and control parameters. The main control chip selects the corresponding control parameters from the data based on the screen brightness requirements and outputs them to the screen driver device.

6. A silicon-based OLED display control system according to claim 1, characterized in that: The main control chip includes a microcontroller (MCU).

7. A display, characterized in that: The display includes a silicon-based OLED display control system according to any one of claims 1-6.

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