JP4067238B2 - Liquid crystal display panel and short-circuit inspection method between electrodes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid crystal display panel and a method for inspecting a short circuit between electrodes, and more specifically, easily checks whether there is a short circuit between even-numbered or odd-numbered transparent electrodes among transparent electrodes formed on a substrate. It relates to the technology that can be made.
[0002]
[Prior art]
With the high definition of electrode patterning technology, the line pitch of transparent electrodes is becoming increasingly narrow, and even if a small amount of foreign matter is mixed in, a short circuit may occur between the electrodes. For this reason, a short circuit check is always performed in the manufacturing process of the liquid crystal display panel.
[0003]
This will be described by using the liquid crystal display panel of the dot matrix display as an example, of the transparent electrodes formed in stripes, simultaneously applying a test voltage to the transparent electrodes belonging to the even-numbered or odd. If there is no short circuit, every other transparent electrode is lit. When there is a short circuit, three adjacent transparent electrodes are lit in that portion.
[0004]
The above example is performed after the liquid crystal display panel is assembled. However, when the inspection is performed with the transparent electrode substrate alone, until the inspection voltage is simultaneously applied to the even-numbered or odd-numbered transparent electrodes. Although the same, the transparent electrode on the side to which the inspection voltage is not applied is hit with a conductive checker or the like, and the portion where the voltage is output is detected as a short-circuit portion.
[0005]
[Problems to be solved by the invention]
According to this inspection method, a short circuit between even and odd numbers can be checked, but a short circuit between even numbers or odd numbers cannot be checked.
[0006]
This will be described by taking a liquid crystal display panel for a telephone as an example. FIG. 3 is a plan view schematically showing one transparent electrode substrate 1 of the liquid crystal display panel. However, in the case of a telephone, a variable display dot matrix display unit 2 and a fixed display icon display unit 3 are usually displayed. Is provided.
[0007]
The icon display unit 3 is formed with icon display patterns such as characters, pictograms, and various graphics, and the lead-out electrodes are drawn out to the terminal unit 1 a side through the dot matrix display unit 2.
[0008]
When performing a short circuit check, the number of lead-out electrodes in the icon display unit 3 is added to the number of electrodes in the dot matrix display unit 2. That is, the inspection voltage is also applied to the routing electrode of the icon display unit 3 depending on whether it is an even number or an odd number.
[0009]
In FIG. 3 , two icon display patterns 4 and 5 are shown as display patterns of the icon display unit 3, but these are arranged in close proximity via a slight gap, and the icon display patterns 4 and 5 are displayed. If the lead-out electrodes 4a and 5a are arranged at the same even number or odd number, even if the icon display patterns 4 and 5 are short-circuited, it cannot be determined.
[0010]
[Means for Solving the Problems]
The present invention has been made to solve the above-described problems, and its purpose is to apply an inspection voltage to either the even-numbered or odd-numbered transparent electrode to check for the presence of a short circuit. An object of the present invention is to provide a liquid crystal display panel and a method for inspecting a short circuit between the electrodes, which can easily check not only a short circuit between the second but also a short circuit between even-numbered or odd-numbered transparent electrodes.
[0011]
According to the present invention, the above object includes a pair of transparent electrode substrates having a transparent electrode formed on one of the transparent electrode substrate described above, the number in group # or odd even are arranged formed in the dot matrix display unit At least two first and second specific transparent electrodes belonging to the same group of the groups are routing electrodes that reach an icon display section adjacent to the dot matrix display section, and the first specific transparent electrode and the first specific transparent electrode within the icon display section. In the liquid crystal display panel in which the first icon display pattern to be connected and the second icon display pattern to be connected to the second specific transparent electrode are arranged close to each other with a slight gap, the first and second icon displays in the gap between the patterns, belonging to different groups with the first, second specific transparent electrode in the dot matrix display unit Is accomplished by forming as a portion of the pulled out from the third specific transparent electrode on the icon display portion third specific transparent electrode enters.
[0012]
For example, if a conductive foreign substance exists between the first and second icon display patterns , or if the first and second icon display patterns are connected due to an etching failure or the like, the third is located between the electrodes. Accordingly, a part of the specific transparent electrode is also connected to the first and second specific transparent electrodes.
[0013]
Therefore, for example, if the inspection voltage is simultaneously applied to the first and second specific transparent electrodes in the even-numbered group, the inspection voltage is also applied to the third specific transparent electrode belonging to the non-voltage-applied odd-numbered group. Thus, it can be seen that the first and second specific transparent electrodes are short-circuited.
[0014]
In this case, it is preferable that a part of the third specific transparent electrode is formed so as to divide the gap over its entire length, and according to this, a short circuit check can be performed more reliably.
[0015]
The “slight gap” between the first and second icon display patterns is a width that is highly likely to be short-circuited due to foreign matters mixed in the panel. For reference, a width that is approximately the same as or slightly larger than the pitch between the dot matrix display type stripe electrodes is illustrated, but the scope of the present invention is not affected by the size of the width.
[0016]
Further, the present invention includes an invention as an inter-electrode short-circuit inspection method. That is, the feature of its structure includes a pair of transparent electrode substrates having a transparent electrode formed on one of the transparent electrode substrate described above, a dot matrix display number number even are arranged and formed in portions groups or odd group At least two first and second specific transparent electrodes belonging to the same group are lead-out electrodes reaching the icon display section adjacent to the dot matrix display section, and are connected to the first specific transparent electrode in the icon display section a second icon display pattern connected to the first icon display pattern and the second specific transparent electrodes are arranged close at a small gap to be, the first, the short circuit between the second icon display pattern when inspecting the presence or absence, belonging to different groups and the first, second specific transparent electrode in the dot matrix display unit 3 identify the portion of the transparent electrode is drawn out to the icon display section the first, formed so as to enter into the gap between the second icon display pattern, together with the pair of transparent electrode substrates via a peripheral sealing material After bonding, liquid crystal is sealed in the cell gap, an inspection voltage is applied to either the even number group or the odd number group, and the display of the first, second, and third specific transparent electrodes is performed. According to the state, the presence or absence of a short circuit between the first and second icon display patterns is inspected.
[0017]
The inspection voltage is applied to either the even number group or the odd number group, but it is preferable to apply the inspection voltage to the group side to which the third specific transparent electrode belongs.
[0018]
According to this, when both the first and second specific transparent electrodes are lit, it can be determined that a short circuit has occurred between the first and second specific transparent electrodes. Further, when only one of the first and second specific transparent electrodes is lit, it is possible to determine that a short circuit has occurred between the specific transparent electrode and the transparent electrode adjacent thereto. .
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described in detail with reference to the embodiment shown in FIG. 1 is a plan view schematically showing one transparent electrode substrate of a liquid crystal display panel for a telephone, similar to the example of FIG. 2 described above, and is regarded as the same as the conventional example of FIG. Components are given the same reference numerals.
[0020]
The transparent electrode substrate 10 is also provided with a variable display dot matrix display unit 2 and a fixed display icon display unit 3. In the dot matrix display portion 2, a large number of transparent electrodes 2 a to 2 n are formed in stripes in parallel with each other.
[0021]
The icon display unit 3, but the icon display pattern such as characters and pictographs that various shapes are formed, as in the conventional example of FIG 3 described earlier in Figure 1, the two icon display pattern 4, Only 5 are shown.
[0022]
The icon display patterns 4 and 5 are arranged close to each other through a slight gap (predetermined width) G, and the lead-out electrodes 4a and 5a pass through an appropriate space between the transparent electrodes 2a to 2n of the dot matrix display unit 2. The transparent electrode substrate 10 is drawn to the terminal portion 1a side.
[0023]
Accordingly, the lead-out electrodes 4a and 5a of the icon display patterns 4 and 5 are apparently included in the transparent electrodes 2a to 2n of the dot matrix display unit 2, and are counted in the number when the inspection voltage for the short circuit check is applied. It is done.
[0024]
Here, for example, if the routing electrodes 4a and 5a of the icon display patterns 4 and 5 are arranged at an even number of 2 × n (n is an integer) in the terminal portion 1a, the routing electrodes 4a and 5a are located between the routing electrodes 4a and 5a. The transparent electrode 2k for the dot matrix display portion 2 belonging to the odd number is selected for short circuit check, and the tip portion 21k is formed so as to enter the gap G between the icon display patterns 4 and 5.
[0025]
The tip 21k is formed so as to divide the gap G over the entire length of the gap G between the icon display patterns 4 and 5, so that a short circuit check between the icon display patterns 4 and 5 is ensured. In addition, it is preferable.
[0026]
In addition, in the terminal part 1a, when counting the number of lead electrodes from the end, when each lead-out electrode 4a, 5a of the icon display patterns 4 and 5 belongs to an odd number, the transparent electrode 2k for short-circuit check is included in the transparent electrode 2k. The even number is selected.
[0027]
In this embodiment, since the inspection voltage is simultaneously applied to the even-numbered transparent electrodes during the short-circuit check, the even-numbered transparent electrodes including the lead-out electrodes 4a and 5a of the icon display patterns 4 and 5 are connected to the bus M. Are connected to each other. The odd-numbered transparent electrodes are separated from the bus M.
[0028]
The transparent electrode substrate 10 is bonded to a counterpart transparent electrode substrate (not shown) via a peripheral sealing material, and a predetermined liquid crystal is sealed in the cell gap. This liquid crystal panel manufacturing process may follow a conventional method.
[0029]
After manufacturing the liquid crystal panel in this manner, a short circuit check is performed. That is, a predetermined inspection voltage is applied to each even-numbered transparent electrode via the bus M. When there is no short circuit at any point, each even-numbered transparent electrode is turned on (for example, black display in the case of positive display, and white display in the case of negative type), and icon display pattern 4 , 5 are also lit.
[0030]
That is, if every other lighting line appears, it is determined that there is no short-circuit portion, whereas if three adjacent lines are lit, it is determined that there is a short-circuit portion.
[0031]
By the way, the icon display patterns 4 and 5 are lit even if they are not short-circuited or short-circuited, but when the icon display patterns 4 and 5 are short-circuited, they are used for short-circuit check. Since the odd-numbered transparent electrodes 2k are lit, it can be determined that there is a short circuit between the icon display patterns 4 and 5.
[0032]
That is, the cause of the short circuit between the icon display patterns 4 and 5 may be that foreign objects exist between them or the icon display patterns 4 and 5 are connected due to an etching failure or the like. Even in this case, the short-circuit portion crosses the tip portion 21k of the transparent electrode 2k, whereby the transparent electrode 2k is in electrical contact with the icon display patterns 4 and 5.
[0033]
Accordingly, since the three lines of the odd-numbered transparent electrode 2k and the even-numbered transparent electrodes 2k-1, 2k + 1 on both sides thereof are continuously lit, it is determined that there is a short circuit. However, whether the short-circuit occurs between the icon display patterns 4 and 5 or whether the short-circuit occurs between the odd-numbered transparent electrode 2k and the even-numbered transparent electrodes 2k-1 and 2k + 1 on both sides thereof. This is due to, for example, visual inspection through a microscope.
[0034]
Unlike the above example, an inspection voltage may be applied to each odd-numbered transparent electrode. In this case, if both icon display patterns 4 and 5 are lit, it is determined that there is a short circuit between them. The Of course, both the icon display patterns 4 and 5 are lit when the lead electrodes 4a and 5a of the icon display patterns 4 and 5 and the transparent electrodes adjacent thereto are short-circuited at the same time. Since it is extremely low, it can be determined that there is a short circuit between the icon display patterns 4 and 5.
[0035]
When only one of the icon display patterns 4 and 5 is lit, it can be determined that a short circuit has occurred between the routing electrode and the transparent electrode adjacent thereto. In addition, after a short circuit check, a part of terminal part 1a in which the bus-line M is formed is cut off from the place of the cutting line C.
[0036]
In the above embodiment, the short-circuit check is performed after the liquid crystal display panel is manufactured. However, the short-circuit check can also be performed as the transparent electrode substrate 10 alone before the panel is manufactured.
[0037]
That is, for example, a test voltage is applied to each even-numbered transparent electrode via the bus M. In this case, for example, a contact pin such as a continuity checker is applied to each odd-numbered transparent electrode and the presence or absence of the voltage is detected. Check out. When the voltage of the transparent electrode 2k for short circuit check is present, it is determined that there is a short circuit between the icon display patterns 4 and 5.
[0038]
Next, a modification of the present invention will be described with reference to FIG. In this modification, six transparent electrodes 21 to 26 formed in a bowl-shaped pattern are provided, and each of the first to third transparent electrodes 21 to 23 counting from the left side is directed rightward. It is a pattern.
[0039]
On the other hand, each of the fourth to sixth transparent electrodes 24 to 26 has a small leftward pattern so as to enter the third transparent electrode 23 so as to face the transparent electrodes 21 to 23. Is arranged. Also in this modification, at the time of a short circuit check between the transparent electrodes, the inspection voltage is simultaneously applied to the even-numbered or odd-numbered transparent electrodes.
[0040]
Therefore, in order to enable a short circuit check between the third transparent electrode 23 and the fifth transparent electrode 25 belonging to the same odd number, the tip 26a of the sixth transparent electrode 26 is connected to the third transparent electrode 26 in this example. It extends to between the transparent electrode 23 and the fifth transparent electrode 25. Note that the tip of the fourth transparent electrode 24 may be extended between the transparent electrodes 23 and 25.
[0041]
【The invention's effect】
As described above, according to the present invention includes a pair of transparent electrode substrates having a transparent electrode is formed, on the one transparent electrode substrate, a group number No. even are arranged formed in the dot matrix display unit or odd At least two first and second specific transparent electrodes belonging to the same group of the number group are routing electrodes that reach the icon display section adjacent to the dot matrix display section, and are connected to the first specific transparent electrode within the icon display section. In the liquid crystal display panel in which the first icon display pattern and the second icon display pattern connected to the second specific transparent electrode are arranged close to each other with a slight gap, the gap between the first and second icon display patterns within, Aiko third specific transparent electrodes belonging to the first, different group than the second specific transparent electrode in the dot matrix display unit By forming so as to enter a portion of the third specific transparent electrode drawn out on the display unit, in order to inspect the presence or absence of a short circuit by applying a test voltage to the even-numbered or odd-numbered one of the transparent electrodes, the even-numbered In addition, it is possible to easily check whether there is a short circuit between the even-numbered or odd-numbered transparent electrodes, as well as a short-circuit check between the odd-numbered and odd-numbered transparent electrodes.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing an embodiment of the present invention.
FIG. 2 is a schematic plan view showing a modification of the present invention.
FIG. 3 is a schematic plan view for explaining a problem of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Transparent electrode board | substrate 1a Terminal part 2 Dot matrix display part 2a-2n Transparent electrode 2k Transparent electrode 3 selected for short circuit check Icon display part 4, 5 Icon display pattern

Claims (4)

It includes a pair of transparent electrode substrates having a transparent electrode formed on one of the transparent electrode substrate described above, at least two belong to the same group of the even number group # or odd groups are arranged formed in the dot matrix display unit first The first and second specific transparent electrodes are routing electrodes that reach the icon display section adjacent to the dot matrix display section, and the first icon display pattern connected to the first specific transparent electrode in the icon display section and the above In the liquid crystal display panel in which the second icon display pattern connected to the second specific transparent electrode is closely disposed with a slight gap,
In the gap between the first and second icon display patterns , the icon display portion is drawn from a third specific transparent electrode belonging to a group different from the first and second specific transparent electrodes in the dot matrix display portion. A liquid crystal display panel, wherein a part of the third specific transparent electrode is inserted.   The liquid crystal display panel according to claim 1, wherein a part of the third specific transparent electrode is formed so as to divide the gap over the entire length thereof. It includes a pair of transparent electrode substrates having a transparent electrode formed on one of the transparent electrode substrate described above, at least two belong to the same group of the even number group # or odd groups are arranged formed in the dot matrix display unit first The first and second specific transparent electrodes are routing electrodes that reach the icon display section adjacent to the dot matrix display section, and the first icon display pattern connected to the first specific transparent electrode in the icon display section and the above An electrode of a liquid crystal display panel in which the second icon display pattern connected to the second specific transparent electrode is disposed close to the second specific transparent electrode with a slight gap, and inspects whether there is a short circuit between the first and second icon display patterns. In the short circuit inspection method,
A portion of the third specific transparent electrode belonging to a group different from the first and second specific transparent electrodes in the dot matrix display portion is drawn out to the icon display portion and within the gap between the first and second icon display patterns . The pair of transparent electrode substrates are bonded to each other through a peripheral sealing material and liquid crystal is sealed in the cell gap, and then either the even number group or the odd number group An inspection voltage is applied to the liquid crystal display panel, and the presence or absence of a short circuit between the first and second icon display patterns is inspected according to the display states of the first, second and third specific transparent electrodes. Intra-electrode short-circuit inspection method.   The method for inspecting a short circuit between electrodes of a liquid crystal display panel according to claim 3, wherein an inspection voltage is applied to a group side to which the third specific transparent electrode belongs.

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