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Display device

A technology for a display device and a display part, which is applied to static indicators, instruments, etc., and can solve the problems of not considering the dispersion characteristics of the column direction and the increase in the scale of the detection circuit.

Active Publication Date: 2009-10-07
JAPAN DISPLAY INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the display device shown in the above-mentioned Patent Document 2 can only detect the state of each pixel in the display part in the row direction where the monitor element is installed, and does not consider the dispersion characteristics in the column direction.
Therefore, although it is desirable to detect its state in each pixel, it is inevitable to increase the scale of the detection circuit

Method used

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no. 1 approach

[0033] figure 1 It is a block diagram showing the outline of the display device of the present invention. The display device is composed of a driver 1 and a display unit 2 . The driver 1 includes a display control unit 3 , a detection switch 4 , a detection unit 5 , and a power source 6 for detection. The display unit 2 includes a display power supply 7 , a display element 8 , a pixel control unit 9 , and a switch 10 . Display data from outside is input to the display control unit 3 of the driver 1 . The display control unit 3 performs timing control and signal control of the above-mentioned display data. The flow of signals in the driver 1 is roughly divided into three paths, which can be understood as a display path, a detection path, and a correction path. The flow in the display path is as follows: the display data enters the display unit 2 through the display control unit 3 and the detection switch 4 , and drives the display element 8 with the display power supply 7 t...

no. 2 approach

[0048] Figure 15 It is a figure which shows the 2nd Embodiment of the display apparatus of this invention, and becomes the same as the 1st Embodiment Figure 11 corresponding figure. Such as Figure 15 As shown in , in this structure a detection is performed on a horizontal line for the two frames displayed. As described above, one frame is composed of a display period and a retrace period, and a detection period (marked 151 in the figure) is allocated to the retrace period.

[0049] Here, the detection period 151 is divided into m blocks which are a half of n blocks which are one horizontal line, and are detected. That is, in this example, it is assumed that m=n / 2. The reason for this is to imagine a case where the detection of one horizontal line is not enough during the detection of one frame, and the pixels in the remaining blocks are detected on the next horizontal line. Therefore, when the detection takes more time, the number of divisions can be increased, and in ...

no. 3 approach

[0052] Figure 17 It is a figure which shows the 3rd embodiment of the display apparatus of this invention, and becomes the same as the 1st embodiment. Figure 17 related to the instructions in . In this configuration, when detecting pixels on each horizontal line, the number of divided blocks does not change, but the number of detected pixels per block is changed. Such as Figure 17 As shown, the block number 175 indicates a divided block on one line, and one line is divided into ten blocks, for example. Mode 1 (equal interval) 176 indicates the case where pixels are detected at equal intervals for each block, and the first and second embodiments have been described on the premise that mode 1 is adopted. On the other hand, in this embodiment, as shown in pattern 2 (variable length) 177, the number of pixels to be detected is reduced at the first end of one horizontal line, is set to be more at the center, and is set at the end. The end of is set to less. Considering the ...

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Abstract

Provided is a display device including: a display section including a plurality of pixels which emit light in an amount varied depending on an amount of current; signal lines used to input a display signal voltage to the pixels; a switch circuit which switches between the signal lines to output signals corresponding to pixel states of the pixels, the pixel states being obtained through a supply of a power source to the pixels; and an A / D converter which sequentially detects the signals corresponding to the pixel states of the pixels along a horizontal line of the display section, in which the A / D converter includes a circuit for changing a reference voltage of the A / D converter, and is structured so as to perform block-by-block detection of signals corresponding to pixel states of pixels in each of a plurality of blocks into which the pixels in the horizontal line are divided.

Description

technical field [0001] The present invention relates to a display device, for example, to a display device whose display elements are composed of self-luminous elements. Background technique [0002] With the spread of various information processing devices, there are various display devices corresponding to their functions. Among them, a so-called self-luminous display device in which a display element is composed of a self-luminous element has attracted attention. It is known that such a display device uses, for example, an organic EL (Electro Luminescence: electroluminescence) element or an organic light emitting diode (Organic Light Emitting Diode) as the display element. Such a display device does not require a backlight, is oriented toward low power consumption, and has advantages such as higher visibility of pixels and faster response speed than conventional liquid crystal displays. Moreover, this light-emitting element has characteristics similar to a diode, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G2310/04G09G3/3275G09G2330/028G09G2320/0233G09G2310/0218
Inventor 石井雅人笠井成彦河野亨秋元肇
Owner JAPAN DISPLAY INC