DE102009007571B4 - Whiteboard presentation platform with camera tripod - Google Patents

Abstract

Presentation platform for the visualization of text and objects with a camera and projector or monitors, characterized in that the platform with whiteboard writing surface enables the quick recording of a commercially available camcorder via a universal 3D tripod head with quick-release plate, the camcorder via its power supply unit housed in the base of the platform is supplied.

Description

It is well known that many educational institutions and companies have fixed video projectors in their classrooms and classrooms. Also, most camcorders are available, chalkboard, whiteboards, flipcharts, episcopes or overhead projectors are used in the same room in parallel to the visual illustration.

Such a prior art is known from US 2006/6077286 A1 known.

The possibilities of existing camcorders are rarely used in conjunction with the installed projectors, because they usually only have a fixed VGA cable connection to a single computer. Even if a video cable is also laid, the connection is often unfavorable to the location of the speaker. Webcam solutions require driver installations and a computer that first needs to be started and usually requires a network login, which is why many a speaker or teacher shy away from ad hoc use.

The specified in claim 1 invention is based on the problem that there is no reasonable solution that makes the existing equipment work together useful.

This problem is solved by the presentation platform having the features set out in claim 1.

The customer's existing camcorders can be mounted in seconds on the quick adapter plate on the presentation platform.

The cable-like transmission of the video signals makes it possible to use the presentation platform without expensive and in practice uncomfortable and less aesthetic cable solutions (surface-mounted channels, floor-trip-thresholds). The solution to be patented requires only a power outlet. Even this does not apply to the battery variant.

In addition to the standard platform, a variant for integration into commercially available overhead roll projection cars is offered.

• • Startbar in Sekundenschnelle-Einschalten und fertig. Limitierend ist lediglich die Bea mer-Startzeit.
• • Mit der Präsentationsplattform kann auf alle anderen didaktischen Visualisierungshilfen (Kreidetafel, Whiteboards, Flipcharts, Overhead-Projektor, Episkop, ...) verzichtet werden, was enorme Einsparpotentiale bietet. Sogar auf ein Waschbecken, das in Klassenzimmern meist alleine den Zweck des Schwammtränkens für des Tafelwischens erfüllt, kann bei Neubauten u. U. verzichtet werden.
• • Der Vortragende hat über das Klappdisplay des Camcorders eine Monitoring-Funktion, d. h. er braucht nicht wie z. B. bei einem Overhead-Projektor seinen Blick vom Publikum Richtung Leinwand ändern.
• • Große Funktionalität eines normalen Camcorders wie Autofokus, Zoomfunktion, Aufzeichnung von Video und Foto, dadurch Dokumentation des ”Tafelbildes” mit der Photo-Funktion.
• • Schreiben in der gewohnten Schriftgröße
• • Beschriftung der Schreibfläche mit trocken abwischbaren Board-Markern. Mit einem „Wisch” ist all das gelöscht wo sonst (Kreidetafel und White-Boards) mehrfach hin und her gewischt werden muss.
• • Projektion von Arbeitsblättern und Buchseiten (Kostenersparnis durch das überflüssig werden von Overhead-Projektoren und -Folien). Auf Grund der weißen Oberfläche können auch „alte” Follen weiterverwendet werden.
• • Die Größe der Schreibfläche ermöglicht es, selbst den Inhalt einer 2 m × 1 m großen Kreidetafel vergleichsweise über den Beamer auf die Leinwand zu projizieren. Die Schreibfläche ist bewusst im Querformat gewählt, sodass sie dem Kamera- und Beamerformat 16:9 (14:9) entspricht. Die Zoom-Funktion des Camcorders eröffnet hier zusätzlich ungeahnte Möglichkeiten (Details von Anschauungsmitteln).
• • Durch die Schnelladapterplatte kann der Camcorder mit einem Handgriff vom Stativ gelöst werden (anderweitige Verwendung, Diebstahlschutz, ...).
• • Wiedergabe von Präsentationen (z. B. Unterrichtsvorbereitung in Powerpoint oder Impress als JPG-Format) ist ohne Computer möglich. Ein Präsenter, wie er als Zusatz für PC's gekauft werden kann, erübrigt sich. Diese Funktion übernimmt die Fernbedienung des Camcorders.
• • Betrachten von Anschauungsmaterial einschließlich der Vergrößerung bis in den Makrozoom-Bereich (Detailgenauigkeit).
• • Durch das Schwenken des Camcorders mit dem 3D-Stativkopf in die Horizontale ergeben sich weitere Anwendungsmöglichkeiten. So können zum Beispiel naturwissenschaftliche Versuche vergrößert projiziert oder ein Verkaufsgespräch im Unterricht aufgezeichnet werden.

With the invention according to claim 1 in particular the following advantages are given:

• • Can be started in seconds and switched on. The only limit is the beamer start time.
• • With the presentation platform, all other didactic visualization aids (chalk board, whiteboards, flipcharts, overhead projector, episcope, ...) can be dispensed with, which offers enormous savings potential. Even on a sink that meets in classrooms usually alone the purpose of sponge drinking for the Tafelwischens, can u. U. be waived.
• • The presenter has a monitoring function via the camcorder's flip-up display, ie it does not need to be connected to the camcorder. For example, with an overhead projector, you can change your view from the audience to the screen.
• • Great functionality of a normal camcorder such as autofocus, zoom function, recording of video and photo, thereby documenting the "blackboard" with the photo function.
• • Writing in the usual font size
• • Labeling of the writing surface with dry-erase board markers. With a "Wisch" is all deleted where else (chalk board and white boards) must be wiped several times back and forth.
• • Projection of worksheets and book pages (cost savings by eliminating overhead projectors and transparencies). Due to the white surface also "old" follies can be reused.
• • The size of the writing surface makes it possible even to project the contents of a 2 m × 1 m chalk board comparatively over the projector onto the screen. The writing surface is deliberately chosen in landscape format, so that it corresponds to the camera and projector format 16: 9 (14: 9). The zoom function of the camcorder opens up unexpected possibilities (details of visual aids).
• • With the quick adapter plate, the camcorder can be detached from the tripod in one easy operation (use, theft protection, etc.).
• • Playback of presentations (eg lesson preparation in PowerPoint or Impress as JPG format) is possible without a computer. A presenter, as it can be bought as an accessory for PC's, is unnecessary. This function takes over the remote control of the camcorder.
• • Viewing slides including magnification to the macro zoom area (detail).
• • Swinging the camcorder with the 3D tripod head into the horizontal position opens up further application possibilities. For example, scientific experiments can be projected larger or a sales pitch can be recorded in class.

An advantageous embodiment of the invention is specified in claim 2. The development according to claim 2 makes it possible to position the presentation platform anywhere in the classroom or meeting room. It is necessary in the Mains operation only a socket. In the embodiment of the invention according to claim 3 can even be dispensed with the mains socket on battery power. With a 2.4 GHz transmitter, a transmission of the camera signals to the projector or the TV set is easily possible in the room. The signal can even be distributed with additional receivers to multiple output devices in the same or adjacent rooms.

No instruction is required for the user, who only has to set two switches (camcorder and presentation platform) to "ON". The projector automatically detects the input signal and switches to the video input. The other camcorder functions such as zoom or playback of images are usually familiar to the user of private use.

Execution:

• Sheet 1: front, side and top view
• Sheet 2: Isometric View, Details A and B
• Sheet 3: soffit
• Sheet 4: Schematic
• Sheet 5: Overhead Carriage

Platform / Tripod Construction (Sheet 1 and 2)

The sock (height about 8 cm) is made of coated wood, so as not to weaken the radio signal too much. As a writing surface is a high quality coated, easily dry wipeable white furniture panel, size about 45 × 40 cm. The anodized aluminum tube or stainless steel tripod mounted on the platform is connected to the housing cover with a plastic foot clamp (Sheet 2, Detail A). Due to the simple clamping with two Allen screws, the stand tube can be rotated around the vertical axis. This extends the application possibilities and disassembly reduces the pack size for shipping. Because the zoom function of the camcorder does not require height adjustment of the lens distance from the whiteboard surface, the tripod tube can be made in one piece. This allows a simple and clean cable routing inside the tube. The height of the tripod is chosen (about 50 cm) so that the camcorder can display at least DIN A4 size in the wide-angle range. At the vertical tube area a cup for pens is mounted.

At the "camcorder end" of the tripod tube, a 3-way tripod head (3/8 '' female thread) mounted with quick-release plate mounted on a clampable tab end. As with the Fußklemmstück this is mass-produced mechanical engineering. At the bottom of the pipe a hole for the exit of the "supply cable" is attached. The head is mounted in such a way that in the basic position the camera points with the lens down towards the writing surface. The camera plate is minimized by the dimensions so that the memory card slot sometimes located on the camera base can be opened by the camera without disassembling the quick-release plate.

Adaptation to mobile cars for overhead projectors

For this purpose, a correspondingly wide writing board is mounted, so that the left and right rests on the carriage frame. Two pre-drilled furniture strips on the underside of the cover to be fastened by the customer using Spax screws prevent lateral slippage on the carriage frame.

radio system

Use in the device find commercially available video transmission systems. The transmitter (2.4 GHz, 4 channels) is placed invisibly in the presentation base (Sheet 3). Its 9 V power supply is plugged into the internal power strip. By opening the bottom (bottom not shown in the sheets!) A possibly necessary change of the channel at the transmitter is possible. The RCA cables are already connected and are led by the tripod tube to the tripod head where then only the camcorder with the RCA beech must be connected.

The receiver is placed on the ceiling mount of the beamer (fixation with cable ties or Velcro strips). The 9 V power supply uses the power supply on the projector with a double socket.

Network version

The transmitter power supply (9 V, 300 mA) is plugged into the 3-way power strip located in the base, the cable feed with strain relief is routed through the housing.

Battery version

The battery solution is connected to the circuit (sheet 4), which is housed in the socket.

In battery mode (switch position II), the Ni-MH battery pack with 2300 mAh guarantees a transmitter runtime (9 V, 300 mA) of at least 8 hours. The battery is charged in 230 V operation (switch position I). The charger used is a 230 V plug-in charger with integrated negative-delta-U control (-ΔU). which monitors the voltage throughout the charging cycle. When the battery pack is fully charged, the charger automatically switches to trickle charging. This will always maintain the optimal capacity of the battery. In 230 V operation, the transmitter is supplied by its own plug-in power supply unit (9 V, 300 mA).

At typical consumption levels of about 3 watts (recording mode) and batteries 7.4 V / 3000 mAh result in more than 7 hours and far enough camcorder runtimes. If you do not use the LCD monitoring, the battery life is extended by a further 30%.

Camcorder light (sheet 2, detail B)

For particularly poor lighting conditions, a diode lamp is offered as a supplement, which is attached to the horizontal tripod tube section and which can be switched on and off via a rotary switch in the lamp head. The voltage is tapped parallel to the transmitter with a corresponding series resistor, the supply is thus either via the battery or the power supply. The cable also runs here in the tripod tube, outlet via a hole on the tube bottom.

camcorder

• • Autofokus
• • Photo-Shot-Funktion
• • Kamera-Slot (SD oder anderer)
• • Fernbedienung
• • Akkuladung ohne dass der Akku von der Kamera genommen werden muss; dadurch kann das Ladegerät im Sockel untergebracht werden und dort ständig verbleiben (Netz- und Akkuladebetrieb)

To achieve full functionality, the camcorder bundle variant is a commercially available camcorder with the following features installed:

• • Autofocus
• • Photo-shot function
• • Camera slot (SD or other)
• • Remote control
• • Battery charge without having to remove the battery from the camera; This allows the charger to be housed in the socket and remain there permanently (mains and battery charging)

The application is especially useful in classrooms, training and lecture rooms. Due to the simple construction, the device can be almost completely manufactured and assembled by auxiliaries.

Claims (5)

Presentation platform for visualization of text and objects with a camera and a projector or monitors, characterized in that the platform with whiteboard writing surface allows the quick recording of a commercial camcorder via a universal 3D tripod head with quick release plate, the camcorder via its housed in the base of the platform power supply is supplied. Presentation platform according to claim 1, characterized in that in the platform additionally a radio transmitter for transmission to beamer or TV set is integrated. Presentation platform according to claim 2, characterized in that the radio transmitter is operated with an independent power supply. Prasentationsplattform according to claim 1, characterized in that the platform can also be used with a mobile overhead carriage. Presentation platform according to claim 1, characterized in that the one-piece tripod tube of the platform allows a simple and clean cable routing inside the tube.

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