JP-2026076180-A - Video wall, driver circuit, drive control circuit, and method relating thereto

Abstract

[Problem] The objective is to further develop the drive control of a lighting unit equipped with LEDs for changing brightness, so that the brightness of the light emitted by the LEDs can be changed relatively easily, accurately, and reliably. [Solution] The present invention relates to various driver circuits, drive control circuits and arrangement structures for supplying current to loads, particularly light-emitting diodes, display devices and video walls. [Selection Diagram] Figure 1

Inventors

• ホア ヴー
• ジョン パーク
• カニシュク チャンド
• フーベアト ハルプリッター
• イェンス リヒター
• ジャン－ジャック ドロレ
• キリアン レーガウ
• パトリック ヘルナー
• トルステン バオムハインリッヒ
• クリストファー ゼル
• ポール ター

Assignees

• エイエムエス－オスラム インターナショナル ゲーエムベーハー

Dates

Publication Date

20260511

Application Date

20251225

Priority Date

20190131

Claims (1)

1. It is a configuration structure, In particular, a device for electronically driving and controlling LED pixel cells created using NMOS technology, - Data signal lines, threshold lines and select signal lines, - An LED, which is electrically connected in series with a dual-gate transistor and connected together with the dual-gate transistor between a first potential terminal and a second potential terminal, - Here, the dual-gate transistor is positioned between the terminal and potential terminal of the LED by its current line contact, and the first control gate of the dual-gate transistor is connected to the threshold line. - A driver circuit for driving a device and/or a plurality of optoelectronic elements, comprising a select-hold circuit having a second control gate of the dual-gate transistor, a charge storage unit coupled to the current line contact of the dual-gate transistor, and a control transistor having a control terminal connected to the select signal line, It includes a plurality of first memory cells, each having a set input, a reset input, and an output, Each first memory cell is triggered to a first state at the output by the set signal of the set input, and maintains the first state until it is reset to a second state by the reset input. The output of each first memory cell is configured to control one of the photoelectronic elements. A driver circuit and/or a supply circuit, - An error correction detector having a reference signal input, an error signal input, and a correction signal output, - A controllable current source having a current output and a control signal terminal, wherein the control signal terminal is connected to the modification signal output to form a control loop for the controllable current source, and the current source is configured to supply current to the current output in response to a signal from the control signal terminal, - A backup source having an output, configured to supply a backup signal, - A control circuit for a display matrix including a supply circuit and/or a plurality of light-emitting devices arranged in rows and columns, the switching device being configured to supply to the error signal input either a signal derived from the current of the current output or the backup signal, in a state where the current output of the current source is additionally isolated in response to a switching signal, - Row select input for row select signal and column data input for data signal, - A ramp signal input for a ramp signal having a trigger input for a level between a first value and a second value and a trigger signal, - A column data buffer configured to buffer the data signal in response to the row select signal, - A display arrangement structure comprising a control circuit and/or a display having a plurality of pixels arranged in rows and columns, the control circuit comprising a pulse generator coupled to the column data buffer and the ramp signal input and configured to supply a buffered output signal to control the on/off ratio of at least one of the plurality of light-emitting devices in response to the trigger signal, the data signal and the ramp signal, - A first substrate structure wherein LEDs forming a pixel structure arranged in rows and columns are arranged in or on the first substrate structure, the LEDs are individually drive-controllable, and a plurality of contacts are arranged on the surface of the first substrate structure facing the direction of light irradiation, - A second substrate structure having a plurality of contacts on its surface corresponding to the contacts of the first substrate structure, and a plurality of digital circuits for addressing photoelectronic structural elements, The first substrate structure and the second substrate structure are connected to each other, and the plurality of contacts are electrically joined to the corresponding contacts. The first substrate structure is formed from a first material system, and the second substrate structure is formed from a second material system different from the first material system. A control circuit for adjusting the brightness of a display arrangement structure and/or at least one LED, - A control terminal whose first terminal is connected to a first potential - A charge storage unit connected between the control terminal and the first potential, which forms a capacitive voltage divider with a capacitance defined between the control terminal and the first potential, - A control element configured to apply a control signal to the control terminal during a first period, wherein the current flowing through the at least one LED can be adjusted during the first period based on the control signal. Includes a current driver element equipped with, During the second period following the first period, the current flowing through the LED is determined by a reduced control signal formed by the control signal during the first period and the control signal of the capacitance divider. The control element is configured to supply a first control signal or a second control signal during the first period to operate the LED at at least two different brightness levels. A configuration structure that includes a control circuit.

Description

This patent application claims priority to the following German applications: German Patent Application Publication No. 102019102509.5 dated January 31, 2019; German Patent Application Publication No. 102019110497.1 dated April 23, 2019; German Patent Application Publication No. 102019115479.0 dated June 7, 2019; and German Patent Application Publication No. 102019112124.8 dated May 9, 2019, the disclosures of which are incorporated herein by reference, and Danish Patent Invention No. 201970061 dated January 29, 2019 (DK This invention claims priority to PA201970061, the disclosure of which is incorporated herein by reference, and also claims priority to International Application PCT/EP2020/052191 dated 29 January 2020, the disclosure of which is incorporated herein by reference. Background Technology: Ongoing developments in the fields of the Internet of Things and communications are opening up a variety of new applications and concepts. For development, service, and manufacturing purposes, these concepts and applications will enhance effectiveness and efficiency. The new concept is based on considerations regarding the supply of current or voltage and the driving control of various loads. In many cases, a power source is not available on the network side; instead, current is typically supplied by energy storage devices such as batteries, rechargeable batteries, or supercapacitors. In the field of display devices or displays, energy supply may not be a major issue at first, but even in this case, minimizing the load on the drive and control elements is extremely important. In addition, as even large displays themselves become thinner, available space is decreasing, and the generated waste heat must be removed. This applies not only to display devices such as displays or video walls, but also to many other loads. Overview The following overview describes various embodiments for driving and controlling large or extra-large displays or screens, particularly video walls. Control circuits and current supply circuits for such devices are described using various embodiments. It should be emphasized that while many embodiments refer to display devices or display arrangement structures, they are not limited to these and are applicable to other loads as well. To consider the following solutions, it is necessary to explain several terms and expressions in order to define a common and equivalent understanding. In this document, the terms described are used generally based on this understanding. However, interpretations may differ in individual cases, and in such cases, these differences are made recognizable. "Active Matrix Display" The term "active matrix display" was originally used for liquid crystal monitors in which thin-film transistors used to control LCD pixels are arranged in a matrix. Each pixel has a circuit with an active component (mainly a transistor) and a current supply terminal. However, this technology is now applied not only to liquid crystals but also to the drive control circuits of LEDs, displays, or video walls in particular. "Active matrix carrier substrate" An "active matrix carrier substrate" or "active matrix backplane" refers to the drive control unit for the light-emitting diodes of a display equipped with a thin-film transistor circuit. In this case, the circuit may be incorporated into the backplane or applied to the backplane. The active matrix carrier substrate has one or more interface contacts that form electrical terminals to the LED display structure. Therefore, the "active matrix carrier substrate" can be a component of an active matrix display or can hold an active matrix display. Augmented Reality (AR) Augmented reality (AR) is an interactive experience of the real world where visual objects exist in the real world and are augmented by computer-generated perceptible information. Augmented reality means precisely this computer-assisted augmentation of reality perception using computer-generated perceptible information. This information can correspond to all human sensory modalities. However, augmented reality is often understood as merely the visual representation of information, that is, supplementing images and videos with additional computer-generated information or virtual objects through fade-in/overlay. "Automotive" The term "automotive" generally refers to the automobile or automotive industry. Therefore, this term should cover not only this sector but also all other industrial sectors, including displays and generally very high-resolution light displays and LEDs. "flip flop" A flip-flop is an electronic circuit whose output signal has two stable states, and is sometimes called a bistable flip-flop or bistable multivibrator. In this case, the current state depends not only on the input signal present at that moment, but also on the state prior to that point in time. It is dependent only on events, not on time. This bistableness allows a flip-flop to store one bit of data f