On-screen display device and on-screen display method thereof

A technology of screen display and memory, applied in the direction of TV, instrument, electric digital data processing, etc., can solve the problem of large memory occupation, and achieve the effect of saving memory, shortening cycle and saving resources

Active Publication Date: 2010-06-30
CRM ICBG (WUXI) CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to ...

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  • On-screen display device and on-screen display method thereof
  • On-screen display device and on-screen display method thereof
  • On-screen display device and on-screen display method thereof

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] figure 1 Shown is an embodiment of the on-screen display device provided by the present invention. Such as figure 1 As shown, the on-screen display device 10 of this embodiment is applied in a digital TV, and it can be integrated with a digital TV chip. On-screen display device 10 comprises SPI (Serial Peripheral Interface) controller 120, icon library memory module 130, character library memory module 140, character index memory module 150, MCU160, OSD controller 170 and DMA (Direct Memory Access) controller ( not shown in the figure).

[0024] Wherein, the SPI controller 120 is connected with the memory outside the screen display device; in the present embodiment, the external memory is an external Flash memory module 110, and the external Flash memory...

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Abstract

The invention relates to an on-screen display device and an on-screen display method thereof, belonging to the technical field of on-screen display. The on-screen display device comprises three modules, i.e. an icon library memory module, a character library memory module and a character index memory module which are used for OSD data storage of the current state, however, a large quantity of OSD static data of other states are stored in an external memory module, thereby significantly saving the memory of the OSD device in on-screen display. Meanwhile, the data of the external memory is transmitted to the memory module by a DMA mode without relying on the MCU, thereby significantly saving OSD device resources. With the combination and application of the on-screen display device and the on-screen display method thereof, the dynamic display or the static display can be realized under the condition with dependence on small-capacity memories.

Description

technical field [0001] The invention belongs to the technical field of on-screen display, and in particular relates to an on-screen display device and an on-screen display method. Background technique [0002] On-screen display technology (on-screen display, OSD), that is, the screen menu adjustment method, generally press the Menu (Menu) button to pop up a rectangular menu of information on the display's various adjustment items, through which you can adjust the display's various items. Work indicators including color, pattern, geometry, etc. are adjusted to achieve the best use status. At present, on-screen display technology has been widely used in various occasions such as flat-panel TVs, digital cameras, and DV players. [0003] In the existing on-screen display device, all OSD data are uniformly stored in an independent memory, and all OSD data are called from one memory. For example, a font library is generally used, which contains all the character lattices to be u...

Claims

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Application Information

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IPC IPC(8): H04N5/445G06F13/00
Inventor 廖明亮王会刚
Owner CRM ICBG (WUXI) CO LTD
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