Display screen circuit and driving control method thereof

Abstract

The invention discloses a display screen circuit device. The display screen circuit device comprises a plurality of LED light-emitting units and an LED driving control unit, the LED light-emitting unit comprises an RGB LED light-emitting element channel, and each LED light-emitting element channel is provided with a driving power supply, an LED light-emitting element and a first switch element. The LED driving control unit is provided with a plurality of LED driving channels, and the three LED light-emitting element channels of the LED light-emitting unit are all connected to one of the LED driving channels; the method comprises the following steps: extracting R, G and B image components from an actual display image to obtain light-emitting time sequence information and light-emitting gray scale information of each LED light-emitting element channel; and the control module is used for controlling the turn-on or turn-off time sequence of the first switch element according to the light-emitting time sequence information, and adjusting the driving current of the LED light-emitting element channel by utilizing the current control function of the LED driving channel according to the light-emitting gray scale information.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of RGB-LED driving technology, in particular to a display screen circuit and a driving control method thereof. BACKGROUND

[0002] RGB display technology, i.e. display technology with RGB-LED as light source, such as high-end LCD, RGB-Mini LED, etc., is currently in rapid development. Its significant color, brightness and energy efficiency advantages make it a new favorite in the high-end display market. RGB display screens mix various colors by adjusting the brightness of red (R), green (G) and blue (B) light-emitting diodes (LEDs). In the prior art, each color of lamp bead needs a separate constant current output channel, which requires arranging a corresponding driving circuit for each color of LED driving channel and occupying a driving channel on an LED driving chip. This results in poor integration of the lamp panel and waste of area.

[0003] Therefore, a new RGB-LED display control method and device are needed to make the wiring of the display device more concise. SUMMARY

[0004] The technical purpose of the present application is to provide a new display screen circuit and a driving control method thereof, which can solve the problems of complex wiring and area waste of the existing circuit.

[0005] To achieve the above technical purpose, the present application provides a display screen circuit device, which comprises a plurality of LED light-emitting units and an LED driving control unit.

[0006] The LED light-emitting unit comprises three RGB LED light-emitting element channels, each of which is provided with a driving power source (VR, VG, VB), an LED light-emitting element (R, G, B) and a first switching element (L1-L3); and when the first switching element of one LED light-emitting element channel is in a conducting state, the first switching elements of the remaining LED light-emitting element channels are in a cut-off state.

[0007] The LED driving control unit is provided with a plurality of LED driving channels, and the three LED light-emitting element channels of the LED light-emitting unit are connected to one of the plurality of LED driving channels.

[0008] The R, G and B image components are extracted from the actual display image to obtain the light-emitting timing information and the light-emitting gray scale information of each LED light-emitting element channel.

[0009] The application proposes to change the original single control of one light bead by one constant current output channel to the common use of three light beads by one constant current channel, and the backlight driving chip performs efficient current regulation and PWM control in the chip, which simplifies the external circuit to a certain extent, reduces the demand for a large number of discrete components, and solves the problems of complex wiring and area waste of the existing circuit.

[0010] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0011] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0012] Figure 1 is a schematic diagram of an RGB-LED driving circuit structure in the prior art;

[0013] Figure 2 is a schematic diagram of an RGB-LED driving circuit structure of the application; DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the application more clear, the application will be further described in detail below with reference to the drawings.

[0015] It will be understood that when an element or layer is referred to as being "on", "adjacent", "connected" or "coupled" to another element or layer, it can be directly on, adjacent, connected or coupled to the other element or layer or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly adjacent", "directly connected", or "directly coupled" to another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application and, similarly, a second element, component, region, layer or section discussed below could be termed a first element, component, region, layer or section without departing from the teachings of the present application.

[0016] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and / or

[0017] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0018] Example 1

[0019] As Figure 2As shown, the display screen circuit device of the present application comprises a plurality of LED light emitting units 1 and an LED drive control unit 2.

[0020] The LED light emitting unit 1 comprises three RGB LED light emitting element channels, each of which is provided with a driving power source (VR, VG, VB), an LED light emitting element (R, G, B) and a first switching element (L1~L3); and when the first switching element of one LED light emitting element channel is in a conducting state, the first switching elements of the remaining LED light emitting element channels are in a cut-off state.

[0021] The LED drive control unit 2 is provided with a plurality of LED drive channels, and the three LED light emitting element channels of the LED light emitting unit 1 are connected to one of the plurality of LED drive channels.

[0022] In this embodiment, the R, G, B image components are extracted from the actual display image to obtain the light emitting timing information and the light emitting grayscale information of each LED light emitting element channel. The timing of the conduction or cut-off of the first switching element is controlled according to the light emitting timing information, and the driving current of the LED light emitting element channel is adjusted using the current control function of the LED drive channel according to the light emitting grayscale information.

[0023] The working process of the display circuit of this embodiment is described as follows. When the red (R) LED light emitting element is powered according to the light emitting timing information, the first switching element L1 is closed and conducted, and at this time, the first switching elements L2, L3 corresponding to the blue (B) LED light emitting element and the green (G) LED light emitting element are in an open cut-off state. The LED drive control unit 2 generates a driving current corresponding to the red (R) LED light emitting element according to the light emitting grayscale information, and outputs the driving current to the LED light emitting unit through the LED drive channel LED1 to control the light emitting brightness of the red (R) LED light emitting element. Subsequently, when the red (R) LED light emitting element completes the light emitting according to the light emitting timing information, the first switching element L1 is opened and cut off, and at the same time, the first switching element L2 corresponding to the green (G) LED light emitting element is closed and conducted, and at this time, the LED drive control unit 2 generates a driving current corresponding to the green (G) LED light emitting element according to the light emitting grayscale information, and outputs the driving current to the LED light emitting unit through the LED drive channel LED1 to control the light emitting brightness of the green (G) LED light emitting element.

[0024] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A display screen circuit device, characterized in that: the display screen circuit device comprises a plurality of LED light-emitting units and an LED drive control unit; wherein the LED light-emitting unit comprises three RGB LED light-emitting element channels, each of which is provided with a driving power source, an LED light-emitting element and a first switching element; and when the first switching element of one LED light-emitting element channel is in a conducting state, the first switching elements of the remaining LED light-emitting element channels are in a cut-off state; the LED drive control unit is provided with a plurality of LED drive channels, and the three LED light-emitting element channels of the LED light-emitting unit are connected to one of the plurality of LED drive channels; the R, G and B image components of the actual display image are extracted to obtain the light-emitting timing information and the light-emitting grayscale information of each LED light-emitting element channel; and the timing of the conduction or cut-off of the first switching element is controlled according to the light-emitting timing information, and the adjustment of the driving current of the LED light-emitting element channel is realized by using the current control function of the LED drive channel according to the light-emitting grayscale information.

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