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Timing generator, imaging device, and dot-clock output method

A dot clock and generator technology, which is applied in the parts and electrical components of TVs and color TVs, and can solve the problems of poor display efficiency and delay.

Active Publication Date: 2012-09-12
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, for other lines, there may be a delay between writing and reading
Therefore, it can be said that in the case of the above structure, if a common phase difference ΔT is given to each row, the display efficiency will be poor.

Method used

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  • Timing generator, imaging device, and dot-clock output method
  • Timing generator, imaging device, and dot-clock output method
  • Timing generator, imaging device, and dot-clock output method

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Experimental program
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Embodiment Construction

[0054] Here, embodiments of the present invention will be described in the following order.

[0055] (1) The structure of the photographing device

[0056] (2) Control of the horizontal synchronization signal

[0057] (3) Other Embodiments

[0058] (1) The structure of the photographing device

[0059] exist figure 1 The photographing apparatus 1 shown as one embodiment of the present invention includes an optical system 10, an area image sensor 15, an ASIC 200, a timing generator 30, a display unit 40, a CPU 50, a VRAM 51, an SD-RAM 52, a ROM 53, a RAM 54, and a VRAM 51. Operation unit 55 . The CPU 50 can use the VRAM 51 , the SD-RAM 52 , and the RAM 54 as appropriate to execute a program recorded in the ROM 53 , by which the CPU 50 executes the generation of a program representing a subject captured by the area image sensor 15 according to an operation on the operation section 55 . function of image data. In addition, the operation section 55 has a shutter button, a DI...

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PUM

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Abstract

A timing generator, an imaging device, and a dot-clock output method are provided. Clocks are output to a display part having a counter being configured to count the number of the dot clocks being output for a horizontal synchronization period, which is a display cycle for a display line, the dot clocks being a synchronization signal used when the image data is displayed. The image data indicates an image of a captured object generated according to the output data of an imaging sensor for capturing an image of the object. However, it is determined whether or not the number of the dot clocks being output within the legnth-variable horizontal synchronization period under the condition that the dot clocks are output for a first cycle exceeds an upper limit value of the counter. If so, the cylce of the clocks is swithced from the first cycle to a second cycle, which is longer than the first cycle.

Description

technical field [0001] The present invention relates to a timing generator for displaying an image of a subject on a display portion, a photographing apparatus for displaying an image of a subject on a display portion having the timing generator, and a method for outputting a dot clock. Background technique [0002] Conventionally, photographing apparatuses that display an image captured by a photographic sensor on a liquid crystal display are widely known, and various techniques have been developed to prevent an image of a subject from being displayed on the liquid crystal display with a delay from the subject. For example, Patent Document 1 discloses a technique in which, in a photographing device having a VRAM that records an image signal for one frame, the image signal is read out before the writing of the image signal for one frame to the VRAM is completed, and the image signal is read out on a liquid crystal display. displayed on the . Specifically, a configuration is...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04N5/77
CPCH04N5/772H04N9/8042H04N23/63H04N25/70H04N23/843H04N25/134H04N25/7795H04N25/745
Inventor 北野正博盐原隆一山本俊之
Owner SEIKO EPSON CORP