Scan type LED display unit, and method for eliminating latent brightness of previous line

A display device and scanning technology, applied in identification devices, lighting devices, static indicators, etc., can solve the problems of strong hidden light, complicated circuit, high cost, etc.

Inactive Publication Date: 2007-07-25
苏州卫优知识产权运营有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this design has fatal disadvantages: complex circuit, low hardware utilization, and huge cost
Because the more the number of light-emitting LEDs, the more current paths, the smaller the current flowing through each path, and the faster the discharge speed, so that each conduction LED is dimly lit and not obvious; when only m+1 When an LED emits light, the light-emitting time is relatively long, which causes the LED to emit light brightly, and a strong hidden brightness appears.
[0010] When the LED display screen has the problem of line hidden brightness, it will cause the LEDs that should not be bright to light up around the LEDs that should be on in the display screen, thus affecting the display effect of the screen.

Method used

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  • Scan type LED display unit, and method for eliminating latent brightness of previous line
  • Scan type LED display unit, and method for eliminating latent brightness of previous line
  • Scan type LED display unit, and method for eliminating latent brightness of previous line

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Embodiment Construction

[0043]The present invention will be described in detail below in conjunction with the accompanying drawings.

[0044] The scanning LED display device of the present invention is mainly used for displaying information such as images and text transmitted by various peripheral devices (such as computers, players, offline systems, etc.), but is not limited thereto.

[0045] As shown in FIG. 1, the scanning LED display device 10 of the first embodiment of the present invention mainly includes a row decoder 11, a row driver 12, several rows of LEDs (please refer to the number 13 in FIG. 1), a column driver 14, and a cascaded circuit. (not shown), the discharge device 16A, and the like will be described in detail below.

[0046] The several rows of LEDs can be arranged in a matrix. In the case of a relatively large display area, the LEDs can be arranged on several unit boards (such as circuit boards) to form a large display screen; In some cases, it can also be directly arranged on ...

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Abstract

A method for eliminating front-line hidden bright of LED display device in scanning type includes detecting variation of line selection signal of said LED display device, generating a discharge control signal to discharge electric charge at output end of line actuator connected with positive pole of a front-line LED for eliminating off hidden bright of said front-line LED when certain LED is lightened up and variation of line selection signal of said LED display device is detected. The LED display device of scanning type applying said method is also disclosed.

Description

【Technical field】 [0001] The present invention relates to an LED display device, in particular to a scanning LED display screen; in addition, the present invention also relates to a method for eliminating the LED display device's forward dimming. 【Background technique】 [0002] The English of light-emitting diode is Light Emitting Diode (LED). Its basic structure is a piece of electroluminescent semiconductor material, placed on a shelf with leads, and then sealed with epoxy resin around it. When it is in the forward working state (that is, a forward voltage is applied to both ends), when the current flows from the anode to the cathode of the LED, the semiconductor material will emit light, and the intensity of the light is related to the magnitude of the current. For many years, LED has been playing an important role in the field of flat panel display, and relying on its unique advantages of high brightness, high strength, long life, splicing, convenience and flexibility, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/20H05B33/08H05B33/14H05B37/02H01L27/32H01L51/50G09F9/33H05B44/00
CPCY02B20/343Y02B20/30
Inventor 邵寅亮
Owner 苏州卫优知识产权运营有限公司
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