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Display device and display panel

A technology for display devices and display panels, which is applied to static indicators, instruments, and main electrodes of discharge tubes, etc., can solve problems such as insufficient understanding, failure to consider the influence of capacitance components, and inability to obtain specified brightness, so as to improve image quality and excellent Effect of Image Quality Correction

Inactive Publication Date: 2007-04-18
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned prior art, the influence of the capacitive component of the light-emitting element has not been considered.
That is, when the driving waveform is rectangular, the actually applied waveform has a delay and becomes a shape that lacks a part of the waveform. As a result, the problem that the specified luminance cannot be obtained due to insufficient voltage being applied is not fully recognized until now.

Method used

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  • Display device and display panel
  • Display device and display panel
  • Display device and display panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1 to 8 are explanatory diagrams of a first embodiment of the present invention. After briefly describing the contents of the operation with reference to FIGS. 1 to 8 , each operation will be described sequentially from FIG. 1 .

[0027] FIG. 1 is a perspective view showing an array display device according to a first embodiment. In FIG. 1 , a display device 1 is in a state supported on a support stand 10 for a display device. Fig. 2 is an enlarged view of a display portion of the embodiment shown in Fig. 1 . A light-emitting element that performs a display operation is composed of a combination of an electron emission portion 210 and a phosphor 230 . FIG. 3 shows a perspective view of the inside of the light emitting element. The electrical connection with the light-emitting element is through common electrodes extending vertically and horizontally in an array, and these electrodes are properly selected for light-emitting action. The light-emitting operation is perf...

Embodiment 2

[0078] Fig. 11 is a block diagram showing the entire circuit configuration of the second embodiment. The parts that are the same as those in the description of the first embodiment are omitted, and the parts that are different from the first embodiment in the second embodiment will be described.

[0079] In this second embodiment, in the display operation constituting one line for displaying one screen, not only the display operation time of one line is changed, but also the ratio of the lighting time to the off time in the display operation time is also changed. .

[0080] In FIG. 10 , the signal to start the one-line display operation operates using a pulse signal from the scan signal terminal 530 as a trigger (trigger).

[0081] A scan signal is sent to the operation of each row from a control unit (not shown). The input pulse-shaped signal is sent to the counter A710, the pulse generating circuit A730, and the counter C910. At this time, the number of input pulses is co...

Embodiment 3

[0089] Fig. 12 is a block diagram showing the overall circuit configuration of the third embodiment. The parts that are the same as the descriptions of the first and second embodiments are omitted, and the parts that are different from the other embodiments in this third embodiment will be described.

[0090] In the third embodiment, in the display operation of one line constituting the display of one screen, the acceleration voltage of electrons is changed without changing the display operation time of one line. In FIG. 12 , the signal to start the display operation for one line operates using a pulse signal from the scanning signal terminal 530 as a trigger (trigger). A scan signal is sent to the operation of each row from a control device not shown.

[0091]The input pulse-shaped signal is sent to the counter A710 and the pulse generating circuit A730. At this time, the number of input pulses is counted in the counter A710, and the result is sent to the ROM720 (read-only ...

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PUM

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Abstract

An electron emission type display apparatus has on a flat plane a matrix layout of multiple light-emitting elements which are connected to cross-points of longitudinal and lateral common electrodes, for sequentially turning on a line of light-emitting elements connected to a common electrode. In such the device, distortion takes place in drive waveform since a low-pass filter (LPF) is formed by a combination of the wiring resistance of the common electrode and the capacitance of a light-emitting element. To avoid such waveform distortion, the width of a light-emitting element driving voltage pulse is caused to be greater than the width of a scan voltage pulse.

Description

technical field [0001] The present invention relates to a display device for displaying television images and the like using a flat panel display portion composed of electron emission elements. Background technique [0002] In display devices such as television receivers, with the advancement of display parts, as flat panel (flat panel type) display parts, field emission elements (Field-emission element) and electron emission elements (Electron-emission element) are being continuously developed. ) and other array display devices. These array-type display devices display a plurality of light-emitting elements constituting pixels arranged in an array. One light-emitting element is composed of an electron source that emits electrons in a space in a vacuum, and a phosphor that emits light by applying a high voltage to accelerate the emitted electrons and exciting the electrons. The components that perform display operations are arranged in a plane on the display screen, connec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/22G09G3/20
CPCG09G3/22G09G2300/06G09G2310/0267G09G2310/0275G09G2310/06G09G3/20H01J1/30
Inventor 白石干夫三轮英治栗田俊之芦泽胜巳
Owner HITACHI LTD