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Display signal processing device having a controllable LED display
| Details |
Inventors: Taira, Hiroyuki; Yamaguchi, Kazuya;
Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP)
Primary Examiner: Hsia; Sherrie
Assistant Examiner:
Attorney, Agent or Firm: Ratner & Prestia
The device comprises a signal processing section and an LED display section. The signal processing section comprises a signal processor for identifying and processing a plurality of types of display signals. The signal processing section comprises a first signal processing section for processing a television signal, and a second signal processing section for processing a non-television signal. Functions performed by the LED display section include identifying and displaying a plurality of types of display signals and controlling the color range to be displayed. |
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DETAILED DESCRIPTION The term "display signal" as used herein generically refers to any signal displayed on an LED and includes a television signal such as an NTSC signal and an HDTV signal, and any other non-television signal such as a graphic signal.
The display system of the present invention includes: an LED display section having light emitting blocks which are arranged in matrix and each include three or more LEDs of different colors; a display signal transmission section for providing a plurality of display signals to be displayed on the LED display section; a display signal identification section for identifying the types of the plurality of display signals; and a color range control section for setting a display color range to be displayed on the LED display section based on signals output from the display signal identification section.
For example, the display signal identification section identifies a television signal, such as an NTSC signal and a high definition television (HDTV) signal, and a graphic signal such an analog RGB signal, so that a control system selection circuit selects a display color range of the LED display section based on the identification result.
For example, multiple point control (at three or more points) is conducted in displaying a graphic, while 3 point control is conducted in displaying a television signal.
The mixing ratio and the light intensity ratio are varied between an NTSC signal and an HDTV signal.
Of course, if the CRT chromaticity range can be displayed, multiple point control may be conducted in displaying video signals.
The mixing ratio as used herein refers to which LEDs are used among those of R, G, B, .
.
.
, in a light emitting block in order to obtain an intended color, i.
e.
, selection of the type, number, etc.
, of LEDs to be illuminated.
The light intensity ratio as used herein refers to the ratio among the respective intensities of light emissions from the selected LEDs.
The light intensity ratio can be controlled by, for example, varying the respective electric current values, e
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