JP2009258534A - Flicker adjustment sheet and flicker adjustment method for display using same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flicker adjustment sheet, capable of easily and accurately performing flicker adjustment, and a flicker adjustment method for display device using the same. <P>SOLUTION: The flicker adjustment sheet 10 includes a transparent sheet body 11, and a plurality of light shielding parts 12 provided on the sheet body 11, and light-shielding a plurality of pixels 25 arranged in a matrix state of a display device of a flicker adjustment object on every other line in the row or column direction thereof. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a flicker adjustment sheet and a flicker adjustment method for a display device using the same.

  In a display device such as a liquid crystal display device, in general, a voltage that reverses to both positive and negative polarities is applied at a constant period in order to prevent deterioration of the display medium. At this time, if the positive / negative balance of the applied voltage is deviated, flicker (change in brightness) occurs, the display medium deteriorates, and the display quality deteriorates.

As a technique for making the flicker inconspicuous, timing of polarity inversion at the time of voltage application, or a combination thereof has been studied. In the initial technique, polarity inversion (field inversion) was performed for each field, but in this case, even if a slight deviation occurred in the counter signal center value, flicker was conspicuous. At present, as described in Patent Document 1, for example, the polarity is inverted (gate line inversion) for each gate line (one horizontal period) to make the flicker inconspicuous. This is because the difference between positive and negative balances is complemented between adjacent lines, and the frequency of brightness change is double that of field inversion, making it difficult for humans to recognize. In addition, polarity inversion methods such as source line inversion have been researched and developed, and other features other than flicker are also taken into consideration for each model of display device.
Japanese Patent Laid-Open No. 2-83527

  The occurrence of flicker needs to be inspected at the manufacturing stage of the display device, and necessary flicker adjustment is performed while inspecting the flicker for the display device adopting the above-described polarity inversion method such as gate line inversion or source line inversion. Has been given.

  However, when the display device is inspected by displaying the entire display surface in halftones, the voltage polarity cancels out between positive and negative, and flicker becomes difficult to recognize.

  The present invention has been made in view of such various points, and an object of the present invention is to provide a flicker adjustment sheet capable of easily and accurately performing flicker adjustment, and a flicker adjustment method for a display device using the same. Is to provide.

  The flicker adjustment sheet according to the present invention includes a transparent sheet main body, and a plurality of pixels arranged in a matrix of the display device to be adjusted for flicker every other line in the row or column direction. And a plurality of light shielding portions for shielding light.

  In the flicker adjusting sheet according to the present invention, the light shielding portion may be provided on the surface of the sheet main body.

  Further, in the flicker adjustment sheet according to the present invention, the light shielding portion may be provided inside the sheet body.

  In the flicker adjustment sheet according to the present invention, the light shielding portion may be formed by printing a light shielding paint on the sheet body.

  Further, in the flicker adjusting sheet according to the present invention, the light shielding portion may be formed by forming a light shielding film on the sheet main body.

  A flicker adjustment method for a display device according to the present invention includes a transparent sheet main body, and a plurality of pixels arranged in a matrix of the display device that is provided on the sheet main body in a row or column direction. A step of preparing a flicker adjustment sheet having a plurality of light shielding portions that shield each other, and a row or column direction of the flicker adjustment sheet with respect to the plurality of pixels of the display device to be adjusted by the plurality of light shielding portions. A step of providing on the display surface of the display device so as to shield light every other line, and a step of adjusting the flicker by displaying the display device in a state where the flicker adjustment sheet is provided on the display surface of the display device; It is provided with.

  ADVANTAGE OF THE INVENTION According to this invention, the flicker adjustment sheet | seat which can perform flicker adjustment simply and correctly and the flicker adjustment method of a display apparatus using the same can be provided.

  Hereinafter, a flicker adjustment sheet according to an embodiment of the present invention and a flicker adjustment method for a display device using the flicker adjustment sheet will be described in detail with reference to the drawings. In the present embodiment, a liquid crystal display device will be described as an example of the display device. The present invention is not limited to the following embodiment.

(Configuration of Flicker Adjustment Sheet 10)
FIG. 1 is a perspective view of a liquid crystal display device 20 subject to flicker adjustment, and a flicker adjustment sheet 10 according to an embodiment of the present invention provided on the display surface of the liquid crystal display device 20.

  As shown in FIG. 2, the flicker adjustment sheet 10 includes a transparent sheet main body 11 and a light shielding portion 12 provided on the sheet main body 11. Here, FIG. 2 shows a plan view of the liquid crystal display device 20 of FIG. 1 and the flicker adjustment sheet 10 provided on the display surface of the liquid crystal display device 20 as viewed from the flicker adjustment sheet 10 side. .

  The sheet body 11 is made of transparent glass or resin. The sheet body 11 is formed in a rectangular shape so as to correspond to the display surface of the liquid crystal display device 20 to be adjusted for flicker. The vertical and horizontal sizes of the surface of the sheet main body 11 may be the same as the size of the display surface of the liquid crystal display device 20 subject to flicker adjustment, or may be larger or smaller. In the case where the size of the sheet main body 11 is smaller than the size of the display surface of the liquid crystal display device 20, the sheet main body 11 may be used by being aligned only with the adjustment target portion. The thickness of the sheet body 11 is not particularly limited, but is formed to about 100 μm, for example.

  The light shielding portion 12 is formed on the surface of the sheet body 11. As shown in FIG. 2, the light shielding unit 12 has a strip shape so that the plurality of pixels 25 arranged in a matrix of the liquid crystal display device 20 to be adjusted for flicker are shielded every other line in the row direction. A plurality are formed at equal intervals.

  The light shielding portion 12 is formed by printing a light shielding paint such as a black paint on the surface of the sheet body 11. The light shielding portion 12 may be formed on the back surface of the sheet body 11 or may be formed inside the sheet body 11. The light shielding unit 12 may be formed by forming a plurality of line-shaped light shielding films on the surface of the sheet body 11. As the light shielding film, a light shielding resin such as a black resin can be used.

  Further, the form of the light shielding portion is not limited to that shown in FIG. For example, as shown in FIG. 3, the light shielding portion 12 ′ of the flicker adjustment sheet 10 ′ includes a plurality of pixels 25 arranged in a matrix of the liquid crystal display device 20 to be adjusted for flicker every other line in the column direction. A plurality of them may be formed at equal intervals on the sheet main body 11 ′ so as to be shielded from light.

  The liquid crystal display device 20 subject to flicker adjustment includes an active matrix substrate 22 in which a plurality of pixels 25 are arranged in a matrix, and a color filter substrate 21 arranged to face the active matrix substrate 22 through a liquid crystal layer (not shown). , And a backlight 23 as a light source of the substrates 21 and 22.

(Flicker adjustment method of the liquid crystal display device 20 using the flicker adjustment sheet 10)
Next, a flicker adjustment method for the liquid crystal display device 20 using the flicker adjustment sheet 10 according to the embodiment of the present invention will be described. Note that the manufacturing method described below is merely an example, and the flicker adjustment method of the liquid crystal display device 20 using the flicker adjustment sheet 10 according to the present invention is not limited to the following.

  First, the liquid crystal display device 20 subject to flicker adjustment is prepared. In the liquid crystal display device 20, before the flicker adjustment, the density of the gray stripes in the halftone of the display pattern is not uniform, and streaky gray stripes, that is, flickers are generated every horizontal synchronization period.

  Next, the flicker adjustment sheet 10 is installed on the display surface of the liquid crystal display device 20 by alignment. At this time, as shown in FIG. 2, the flicker adjustment sheet 10 shields the plurality of pixels 25 arranged in a matrix on the display surface of the liquid crystal display device 20 every other line in the row direction. Arrange as follows.

  Here, as shown in FIGS. 4A and 4B, the liquid crystal display device 20 includes an odd field in each pixel 25 corresponding to the gate line (G1 to G6) and the source line (S1 to S6). When the even field is switched, the polarity is inverted for each gate line.

  In each pixel 25 corresponding to the gate line (G1 to G6) and the source line (S1 to S6), the liquid crystal display device 20 has an odd field and an even number as shown in FIGS. When the polarity is reversed for each source line when the field is switched, the flicker adjustment sheet 10 ′ shown in FIG. 3 is used.

  Next, the backlight 23 of the liquid crystal display device 20 is turned on and a drive signal is sent to display the liquid crystal display screen.

  Subsequently, the flicker on the display screen is confirmed. At this time, if the flicker is unclear due to the polarity being offset between the adjacent gate lines (or source lines) at a predetermined portion on the target display screen, the flicker becomes the most prominent position. While confirming the display screen, the flicker adjustment sheet 10 is moved to adjust the light shielding portion 12 so as to be appropriately disposed on the line as the light shielding target on the display screen.

  In this way, the liquid crystal display device 20 is set in a state where the flicker can be clearly recognized, and the deviation of the center value of the counter signal or the deviation of the center value of the pixel electrode signal that causes flicker is adjusted. The occurrence of flicker is suppressed.

  In the above embodiment, as the display device, an LCD (liquid crystal display) has been exemplified. However, the present invention is directed to PD (plasma display), PALC (plasma addressed liquid crystal display). Display such as plasma addressed liquid crystal display), organic EL (organic electroluminescence), inorganic EL (inorganic electroluminescence), FED (field emission display), or SED (surface-conduction electron-emitter display) It can also be applied to flicker adjustment of the apparatus.

(Function and effect)
Next, the effect of the flicker adjustment sheet 10 according to the embodiment of the present invention and the flicker adjustment method of the liquid crystal display device 20 using the same will be described.

  A flicker adjustment sheet 10 according to an embodiment of the present invention includes a transparent sheet body 11 and a plurality of pixels 25 provided in the sheet body 11 and arranged in a matrix of a display device to be adjusted for flicker. And a plurality of light shielding portions 12 that shield light every other line.

  A flicker adjustment method for a display device according to an embodiment of the present invention includes a transparent sheet main body 11 and a plurality of pixels 25 provided in the sheet main body 11 and arranged in a matrix of the display device subject to flicker adjustment. A step of preparing a flicker adjustment sheet 10 provided with a plurality of light shielding portions 12 that shield light every other line in the direction, and a plurality of light shielding portions 12 of the plurality of light shielding portions 12 of the display device to be adjusted. The display device is displayed in a state in which the pixels 25 are provided on the display surface of the display device so as to shield light every other line in the row direction, and the flicker adjustment sheet 10 is provided on the display surface of the display device. And a step of adjusting flicker.

  According to the above-described configuration, flicker can be clearly recognized only by providing the flicker adjustment sheet 10 on the display screen of the liquid crystal display device 20 that is subject to flicker adjustment. Flicker adjustment can be performed. Therefore, the flicker adjustment of the liquid crystal display device 20 can be performed easily and accurately.

  Even if the flicker adjustment sheet 10 is not used, the digital signal input model can perform the same adjustment by displaying every other line of the striped pattern, but the analog signal input model displays this striped pattern. Is difficult. On the other hand, according to the configuration of the present invention, the flicker adjustment of the display device can be easily and accurately performed even in the analog signal input model only by providing the flicker adjustment sheet 10.

  As described above, the present invention is useful for a flicker adjustment sheet and a flicker adjustment method for a display device using the same.

1 is a perspective view of a liquid crystal display device subject to flicker adjustment and a flicker adjustment sheet according to an embodiment of the present invention provided on a display surface of the liquid crystal display device. FIG. 5 is a plan view of a flicker adjustment sheet in which a plurality of pixels arranged in a matrix of a liquid crystal display device subject to flicker adjustment are formed at equal intervals so as to shield light every other line in the row direction. FIG. 5 is a plan view of a flicker adjustment sheet in which a plurality of pixels arranged in a matrix of a liquid crystal display device subject to flicker adjustment are formed at equal intervals so as to shield light every other line in the column direction. FIG. 4 is a pixel layout diagram of a liquid crystal display device in which polarity is inverted for each gate line when switching between an odd field and an even field. FIG. 6 is a pixel layout diagram of a liquid crystal display device in which polarity is inverted for each source line when switching between an odd field and an even field.

Explanation of symbols

10, 10 'Flicker adjustment sheet
11, 11 'seat body
12, 12 'Shading part

Claims (6)

A flicker adjustment sheet for a display device in which a plurality of pixels are arranged in a matrix,
A transparent sheet body,
A plurality of light-shielding portions that are provided in the sheet main body and shield a plurality of pixels arranged in a matrix of a display device to be adjusted for flicker, every other line in the row or column direction;
Flicker adjustment sheet with In the flicker adjustment sheet according to claim 1,
The light shielding part is a flicker adjustment sheet provided on a surface of the sheet main body. In the flicker adjustment sheet according to claim 1,
The light shielding part is a flicker adjustment sheet provided inside the sheet body. In the flicker adjustment sheet according to claim 1,
The light shielding part is a flicker adjustment sheet formed by printing a light shielding paint on the sheet body. In the flicker adjustment sheet according to claim 1,
The light shielding part is a flicker adjustment sheet formed by forming a light shielding film on the sheet body. A flicker adjustment method for a display device in which a plurality of pixels are arranged in a matrix,
A transparent sheet main body, and a plurality of light shielding portions that are provided in the sheet main body and shield a plurality of pixels arranged in a matrix of the display device to be adjusted for flicker every other line in the row or column direction. Preparing a flicker adjustment sheet provided,
Providing the flicker adjustment sheet on the display surface of the display device so that the plurality of light shielding portions shield light from the plurality of pixels of the display device to be adjusted every other line in the row or column direction;
Adjusting the flicker by displaying the display device in a state where the flicker adjustment sheet is provided on the display surface of the display device;
Flicker adjustment method for a display device comprising:

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