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DE-102014114749-B4 - Backlit advertising banner and method for adjusting the brightness of the advertising banner

DE102014114749B4DE 102014114749 B4DE102014114749 B4DE 102014114749B4DE-102014114749-B4

Abstract

Advertising banner (1), in particular for the presentation of banner advertising at winter sports events, with a housing (10) in which at least one light source (21) is arranged for backlighting at least one at least partially translucent advertising surface (20, 51, 52, 53), wherein: - the advertising banner (1) has at least one control unit (30) for adjusting the radiant power emitted by the light source (21) in order to adjust the brightness of the backlit advertising area (51, 52, 53), and - the control unit (30) is connected to at least one sensor for determining the ambient brightness in the space surrounding the advertising banner, in order to determine the ambient brightness by means of the sensor and to adjust the brightness of the advertising area (20) to a value dependent on the ambient brightness by adjusting the radiant power of the light source (21), - the control unit (30) is connected to a brightness sensor (31) for measuring the actual value of the brightness of the partially translucent advertising surface (20) and regulates the actual value to a target value dependent on the ambient brightness by adjusting the radiant power of the light source (21), characterized by the fact that - the control (30) captures at least one image showing the advertising banner, - the advertising banner (1) has at least one infrared light source marking the advertising area (20) and that - the control (30) determines an image section that at least partially depicts the advertising area based on the infrared marking and determines the brightness of the advertising area (20, 51, 52, 53) based on the brightness values of the image section.

Inventors

  • Christoph A. Parbel

Assignees

  • APA PROMOTION GMBH

Dates

Publication Date
20260513
Application Date
20141010

Claims (7)

  1. Advertising banner (1), in particular for the presentation of banner advertising at winter sports events, with a housing (10) in which at least one light source (21) for backlighting at least one at least partially translucent advertising surface (20, 51, 52, 53) is arranged, wherein: - the advertising banner (1) has at least one control unit (30) for adjusting the radiant power emitted by the light source (21) in order to adjust the brightness of the backlit advertising surface (51, 52, 53), and - the control unit (30) is connected to at least one sensor for determining the ambient brightness in the space surrounding the advertising banner in order to determine the ambient brightness by means of the sensor and to adjust the brightness of the advertising surface (20) to a value dependent on the ambient brightness by adjusting the radiant power of the light source (21), - the control unit (30) is connected to a brightness sensor (31) for measuring the actual value of the brightness of the partially translucent advertising surface (20) is connected and regulates the actual value to a target value dependent on the ambient brightness by adjusting the radiant power of the light source (21), characterized in that - the control (30) captures at least one image showing the advertising banner, - the advertising banner (1) has at least one infrared light source marking the advertising area (20) and that - the control (30) determines an image section that at least partially depicts the advertising area based on the infrared marking and determines the brightness of the advertising area (20, 51, 52, 53) based on the brightness values of the image section.
  2. Advertising banner (1), after Claim 1 , characterized in that the infrared light source emits a flashing signal and the control (30) determines the position of the image of the infrared light source in the image on the basis of the flashing signal.
  3. advertising banner (1) after one of the Claims 1 until 2 , characterized in that the control unit (30) averages the ambient brightness over several measurements, and the brightness of the advertising area is adjusted depending on the average brightness value.
  4. Advertising banner after one of the Claims 1 until 3 , characterized in that the light source (21) has at least one LED, the mean radiant power of which is set by the control by a pulse width modulation, wherein at least one coil is arranged between the output of the pulse width modulation and the LED.
  5. Method for adjusting the brightness of at least one translucent advertising surface (20, 51, 52, 53) of an advertising banner (1) backlit by at least one light source (21), in particular an advertising surface (20, 51, 52, 53) of an advertising banner (1) according to one of the preceding claims, comprising at least the steps of: (i) determining the brightness in the vicinity of the advertising surface (20, 51, 52, 53), (ii) backlit the advertising surface (20, 51, 52, 53) with at least one light source (21), wherein the radiant power of the light source (21) is adjusted as a function of the previously determined brightness of the surroundings, wherein the actual value of the brightness of the partially translucent advertising surface (20) is measured and regulated to a target value dependent on the ambient brightness by adjusting the radiant power of the light source (21), characterized in that the method further comprises the steps of: - capturing at least one image that the advertising banner (1) shows, by means of a control (30), - marking the advertising area (20, 51, 52, 53) with an infrared marking by an infrared light source of the advertising banner (1), - determining an image section that at least partially depicts the advertising area (20, 51, 52, 53) based on the infrared marking, by the control (30), and - determining the brightness of the advertising area (20, 51, 52, 53) based on the brightness values of the image section, by the control (30).
  6. Procedure according to Claim 5 , characterized in that the actual value of the brightness of at least a part of the advertising area (20, 51, 52, 53) is determined and compared with a lower target value, wherein the radiant power of the light source is increased if the actual value is less than the lower target value.
  7. Procedure according to Claim 6 , characterized in that the actual value of the brightness of at least a part of the advertising area (20, 51, 52, 53) is determined and compared with an upper target value, wherein the radiant power of the light source is reduced if the actual value is greater than the upper target value.

Description

Technical field The invention relates to an advertising banner with a housing. At least one side or part of a side of the housing is formed by an at least partially translucent information surface (hereinafter referred to as the "advertising surface"), which carries optically perceptible information directed towards a viewer of the information surface. On the side of the cover facing away from the viewer, there is at least one light source to backlight the cover. State of the art Sports advertising is a significant economic sector that leverages the interest of sports enthusiasts in sporting events to convey advertising messages from the sports organizers' clients. Stadium advertising, or advertising at sports venues in general, plays a major role in sports advertising. This refers specifically to the placement of advertisements within the sports venue itself. Often, the information is displayed on boards that define the boundaries of the actual sports area, such as a playing field. Viewers watching the athletes will at least peripherally perceive the information displayed on these boards. Advertisers hope to transfer the positive image associated with sports to their products or, at the very least, increase brand awareness. In its simplest form, an advertising banner is a flat or curved panel erected at the edge of a sports venue and displaying an advertising message. There are numerous patent and utility model applications for this type of advertising banner, aiming either to increase viewer attention or to solve other technical problems such as stability, accident prevention, manufacturing issues, etc. To name just a few examples: DE 199 37 037 A1 , EP 1 501 068 A1 DE 20 2008 006 975 U1 , DE 203 17 063 U1 as well as DE 20 2004 003 651 U1 named. To increase viewer attention to the information being conveyed, so-called rolling banners were proposed, each featuring a viewing surface facing the viewer, as is typical. This surface is formed by a printed, flexible advertising medium wound onto two rolls, allowing different sections of the medium to be revealed by rotating the rolls (see, for example, [reference]). DE 20 2004 006 875 U1 ). Further flexibility in information display was achieved with the APA-LED light strip (see www.APA-LED-Leuchtbande.de). This is a 2D array of multi-colored LEDs that can be individually controlled. The LEDs are located in recesses behind a black protective cover. Each LED corresponds to one pixel of the information to be displayed. A similar system is used, for example, in the US 6 364 507 B1 These LED light boards are well-suited for some sports, such as football, but not for other sports that often take place in natural surroundings. A major reason for this is the high energy consumption of the LED boards and their comparatively heavy weight. The purchase price also makes their use in less spectator-friendly sports currently uneconomical. Another problem with these LED light boards is their optical properties: As Lambertian radiators, the LEDs emit very poorly at wide beam angles (relative to the surface normal at the emission point), and the individual LEDs are clearly visible at close range, making the displayed information appear pixelated. In the DE 10 2009 056 806 A1 This describes an illuminated sign in the form of a single letter. The letter has the usual construction consisting of a housing with a light channel integrated within it and a front panel that borders the light channel. A brightness sensor measures the ambient light level, and the light intensity emitted by the backlighting LEDs is adjusted accordingly. The LEDs are supplied with a pulsed DC voltage via a controller. The intensity of the light emitted by the LEDs can be adjusted by changing the number or width of the pulses. The brightness sensor is located next to the LEDs on a circuit board to determine the ambient light intensity during the pulse intervals. During the pulses, the brightness sensor measures the brightness inside the illuminated sign. EP 2071 983 A1 This concerns a lighted display case in which an object is illuminated with LEDs. In the WO 2010/046065 A1 Several variations of a buck converter for driving LEDs are described. These descriptions start with a classic buck converter circuit, which is supplemented by a capacitor connected in parallel to the LEDs. This capacitor smooths the current through the LEDs, so that the light appears flicker-free even at low intensities. WO 2010 / 111 725 A1 discloses an advertising light source with a defined light emission area and a gas discharge lamp. The lamp illuminates a light chamber, with a specific light color and brightness emanating from a light emission area, and a light-emitting diode (LED) arranged in the light emission area changing the light color and/or brightness. The LED has several sub-areas that can be selectively controlled and activated. US 2014/0253841A1 describes an LCD display and a control method for it. Conventional TN-LCDs,