JP2006243359A - Display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive display panel by which low voltage, low power consumption and high precision are attained by realizing passive screen division drive by directly arranging an IC diver to the display panel without interposing an external connection substrate. <P>SOLUTION: The display panel has: a display part 4 using intersections between a plurality of common electrodes 2 and a plurality of segment electrodes 3 as pixels; and a terminal connection part in which a common driver 14 is arranged, the display part 4 is divided into a first display area 6 and a second display area 7 in the arranging direction of the common electrodes, each of the display areas 6, 7 is driven by individual segment drivers 15, 16, an output terminal of the common driver 14 is connected with a common electrode 2 of the first display area 6 by laying wiring 2a at the terminal connection part, and the output terminal of the common driver is connected with a common electrode of the second display area 7 by laying wiring 11 via a transfer part 10 at the terminal connection part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display panel mounted on a display device that performs screen division driving by a passive driving method.

  Passive drive type display panels widely used in electronic devices are, for example, formed in stripes on transparent substrates on which a plurality of common electrodes (scanning electrodes) and a plurality of segment electrodes (data electrodes) face each other. The crossing portion is a pixel to form a display portion. That is, a display portion having the number of pixels m × n is formed by m common electrodes and n segment electrodes.

  Also, the signal input side end of each electrode is drawn out to a terminal connection formed at the edge of the transparent substrate, and the terminal connection is formed of an FPC or a printed circuit board through an anisotropic conductive film. Connected to the connection board. The external connection board includes an IC driver for driving each electrode (hereinafter, an IC driver connected to the common electrode is referred to as a common driver, and an IC driver connected to the segment electrode, if necessary. And a signal line for connecting each IC driver to a terminal connection portion of the transparent substrate. The on / off of each display pixel is controlled by a signal (drive waveform) applied to the common electrode and the segment electrode from the common driver and the segment driver, respectively, so that full dot display is performed by duty driving. . Specifically, by sending pulse signals sequentially from the common driver to the common electrode, and by inputting ON / OFF information to each segment electrode from the segment driver according to the timing, the pixel at the intersection of the common electrode and the segment electrode is changed. Blinks according to the ON / OFF information.

  For example, in a liquid crystal display panel with 100 common electrodes and 200 segment electrodes, as described above, the passive drive method is duty drive, so the common driver has 100 common electrodes. Driving is performed with a duty ratio of 1/100 at the time of division.

  Here, in the display panel, as the duty ratio of passive driving increases, the image quality deteriorates and the driving voltage increases as the denominator value increases. In other words, it is considered preferable to reduce the value of the denominator of the duty ratio in order to obtain good image quality and lower the drive voltage.

  Therefore, a screen division driving method has been conventionally employed. In this screen division drive, for example, in the case of two screen division drive, the common electrode is divided vertically from the center in the arrangement direction to form two blocks, and the number of simultaneously selected lines is set to one for each block. This is a driving method in which selection pulses are uniformly distributed within one frame period in a block. That is, to drive each of the two blocks individually, one common driver selects each of the two blocks of common electrodes.

  More specifically, since the above-described display panel has 100 common electrodes in the above-described conventional display panel, these are divided into two blocks vertically by 50. The common driver scans 50 common electrodes at a duty ratio of 1/50 in each block.

  In the display panel driven in this way, the duty ratio can be halved compared to the case where the common electrode is not divided, and low voltage, low power consumption, and high luminance can be achieved. It becomes possible.

JP 2000-298446 A

  However, as described above, in the conventional screen division driving, the common electrodes constituting the pixels of the display unit divided into two are connected to a common driver via another printed circuit board or an external connection board such as an FPC, respectively. In the external connection substrate, since the wiring configuration is capable of two-division driving, the external connection substrate is essential, and the display panel itself cannot be designed compactly.

  In addition, a configuration in which one set of common driver and segment driver is directly disposed on the transparent substrate for each block of the divided display unit is employed. In this configuration, the number of IC drivers disposed is Therefore, a cost problem arises separately.

  Therefore, the present invention can achieve low voltage, low power consumption, and high luminance by disposing an IC driver directly on the display panel without using an external connection board and realizing passive screen division driving. Another object is to provide an inexpensive and simple display panel.

  In order to achieve the above-described object, a first aspect of the display panel of the present invention includes a display unit having pixels at intersections of a plurality of common electrodes and a plurality of segment electrodes, and a terminal connection unit in which a common driver is disposed. And the display section is divided into a first display area and a second display area in the common electrode arrangement direction, and each display area is driven by an individual segment driver, and an output terminal of the common driver The common electrode of the first display region is connected at the terminal connection portion, and the output terminal of the common driver and the common electrode of the second display region are connected via the transfer portion at the terminal connection portion. It is characterized by being.

  According to a second aspect of the display panel of the present invention, there is provided a display unit having pixels at intersections of a plurality of common electrodes and a plurality of segment electrodes, a terminal connection unit in which a common driver is disposed, and the display unit. And the display section is divided into a first display area and a second display area in the common electrode arrangement direction, and each display area is an individual display area. Driven by a segment driver, the output terminal of the common driver and the common electrode of the first display region are connected by the terminal connection portion, and the common electrode of the first display region and the common electrode of the second display region Are connected at the outer peripheral edge.

  Further, according to a third aspect of the display panel of the present invention, in the display panel according to claim 2, the common electrode of the first display region and the common electrode of the second display region are at the outer peripheral edge. It is connected through a transfer part.

  According to the first aspect and the second aspect of the display panel of the present invention, the input of image information to the common electrode of the first display region and the common electrode of the second display region is mounted on the terminal connection portion. It is possible to control the drive with two common drivers. That is, by devising the electrode wiring structure in the display panel, the drive control for dividing the display portion into two can be performed with a small number of IC drivers and without using an external connection member. In addition, the present invention is advantageous in that it can be driven at a low voltage and with low power consumption and display with high luminance can be obtained.

  Furthermore, according to the 3rd aspect, in addition to the effect of a 2nd aspect, it is possible to increase the freedom degree of design of electrode wiring.

  Hereinafter, the display panel of the present invention will be described using three embodiments.

  A display panel used in the following embodiments is a passive drive type liquid crystal display panel in which a plurality of common electrodes and a plurality of segment electrodes are formed in a matrix, and a crossing portion of each electrode constitutes a pixel to constitute a display unit It is.

  The configuration of the liquid crystal display panel will be briefly described. A pair of transparent substrates having a common electrode and a segment electrode as transparent electrodes formed on opposite surfaces are surrounded by a peripheral portion of the transparent substrate. In this manner, the sealing material is integrally bonded to each other, liquid crystal is injected and sealed between these transparent substrates, and then a polarizing plate is bonded to the outer portion of each transparent substrate. One of the transparent substrates constituting the liquid crystal display panel is formed larger than the other transparent substrate, and the protruding portion of the other transparent substrate is connected to each of the common drivers and each of the common electrodes. It is set as the terminal connection part to which the routing wiring made is wired.

  FIG. 1 is a schematic plan view showing a display panel 1 in an embodiment (first embodiment) corresponding to the invention described in claim 1 of the present invention, and the display unit 4 is a central portion of the array of the common electrodes 2. Are divided into two upper and lower blocks, which are a first display area 6 and a second display area 7, respectively.

  In the present embodiment, a common driver 14 is disposed in the terminal connection portion of the one transparent substrate outside the display portion 4, and each common electrode 2 and common driver 14 in the first display region 6 is disposed. An input side wiring 2a is formed to connect the output terminal. The segment electrodes 3 in the first display area 6 and the second display area 7 are connected to the output terminals of the individual segment drivers 15 and 16 through the input side wiring 3a.

  In the present embodiment, the second display region 7 having the same arrangement order as the intermediate portion of the input side lead-out wiring 2 a connected to the common electrode 2 of the first display region 6 is arranged in each display region 6. The common-side wiring 2a of the common electrode 2 is three-dimensionally and electrically connected by the routing wiring 11 formed on the other transparent substrate through the transfer portion 10 formed on the one transparent substrate. It is connected to the.

  FIG. 2 is a schematic plan view showing the display panel 1 in an embodiment (second embodiment) corresponding to the invention described in claim 2 of the present invention. In the following, only the electrode wiring structure which is a characteristic part will be described, and the other parts will not be described because they are configured in the same manner as in the first embodiment or the known technique.

  In the second embodiment, a common driver 14 is arranged at the terminal connection portion of the one transparent substrate outside the display portion 4, and each common electrode 2 in the first display region 6 and the common driver are arranged. An input side wiring 2a for connecting the 14 output terminals is formed. In addition, a connection wiring connected to each common electrode 2 in the first display region 6 and each common electrode 2 in the second display region 7 at an outer peripheral edge that faces the terminal connection portion via the display portion 4. 9 is formed. Further, the segment electrodes 3 in the first display area 6 and the second display area 7 are connected to the output terminals of the individual segment drivers 15 and 16 through the input side wiring 3a.

  In the display panel 1 of the present embodiment, the first display area 6 is located at a position that is vertically symmetric with respect to the boundary line between the first display area 6 and the second display area 7 as an axis of symmetry. As shown in FIG. 2, each common electrode 2 and the common electrode 2 in the second display region 7 are electrically connected by connecting wires 9 formed on the outer peripheral edge of the one transparent substrate, Each common electrode 2 is configured to be connected across the first display area 6 and the second display area 7.

  In the display panel 1 having such an electrode wiring structure, image information input from the common driver 14 to each common electrode 2 is received by the information processing unit (not shown) connected to the display panel 1 with the first information. The image information of the image displayed in the second display area 7 needs to be processed image information that is reversed in the order of arrangement of the common electrodes 2 constituting the second display area 7.

  FIG. 3 is a schematic plan view showing an electrode wiring structure of the display panel 1 in an embodiment (third embodiment) corresponding to the invention described in claim 3 of the present invention. Hereinafter, only the electrode wiring structure which is a characteristic part will be described, and the other parts will be omitted because they are configured in the same manner as in the first embodiment, the second embodiment, and the known technology.

  In the present embodiment, a common driver 14 is disposed in the terminal connection portion of the one transparent substrate outside the display portion 4, and each common electrode 2 in the first display region 6 and the common driver are arranged. An input side wiring 2a for connecting the 14 output terminals is formed. Further, the common electrode 2 of the first display region 6 and the common electrode 2 of the second display region 7 are connected to the outer peripheral edge that faces the terminal connection portion via the display portion 4. A transfer unit 10 is formed. Further, the segment electrodes 3 in the first display area 6 and the second display area 7 are connected to the output terminals of the individual segment drivers 15 and 16 through the input side wiring 3a.

  In the present embodiment, the common electrode 2 in the first display area 6 and the common electrode 2 in the second display area 7 having the same arrangement order in each display area 6 are disposed on the outer peripheral edge. The three-dimensionally and electrically connected wirings 11 are formed on the other transparent substrate through the transfer unit 10.

  In the display panel 1 having such an electrode wiring structure, image information input from the common driver 14 to each common electrode 2 is received by the information processing unit (not shown) connected to the display panel 1. The image information of the image displayed in the second display area 7 is set as the image information in the arrangement order of the common electrodes 2 constituting the second display area 7.

  In the liquid crystal display panel having such a structure of the transfer unit 12, image information of an image displayed in the second display area 7 is displayed in the second display area in an information processing unit (not shown) connected to the display panel. Processing is performed in the order of arrangement of the segment electrodes 3 constituting the region 7, and a signal based on the processed image information is output from the common driver 14.

  In the display panels of these embodiments, one common driver is used so that the number of simultaneously selected lines is one for each display area, and the first display area 6 and the second display area 7 are individually driven. 14, the common electrodes 2 of the first display area 6 and the second display area 7 are selected one by one, and pulses are distributed and applied evenly within one frame period. In the liquid crystal display panel driven in this way, the duty ratio can be halved compared to the case where the common electrode 2 is not divided, and low voltage, low power consumption, and high luminance are achieved. It becomes possible.

  In the display panel of the first embodiment, when the common electrodes 2 of the first display area 6 and the second display area 7 are electrically connected in a one-to-one relationship, all the electrode wirings are included in the display panel. Since it can be accommodated, the structure is simple and can be realized at low cost.

  In the display panel of the first embodiment and the display panel of the third embodiment, each of the common electrodes 2 in the first display area 6 and the second display area 7 is electrically connected on a one-to-one basis. The wiring is common in that it passes through the transfer unit 10.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed.

  For example, you may use the electrode wiring structure which combined the connection electrode in 2nd Embodiment mentioned above, and the transfer part in 3rd Embodiment. Moreover, in the said embodiment, although demonstrated taking the case of the liquid crystal display panel as the said display panel, the display panel 1 is not restricted to a liquid crystal display panel, For example, the display using an organic EL element (organic electroluminescent element) is used. A panel may be sufficient.

1 is a schematic plan view of a first embodiment of a display panel of the present invention. The schematic plan view of 2nd Embodiment of the display panel of this invention. The schematic plan view of 3rd Embodiment of the display panel of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display panel 2 Common electrode 3 Segment electrode 4 Display part 6 1st display area 7 2nd display area 9 Connection wiring
10 Transfer section 11 Lead-out wiring 14 Common driver 15, 16 Segment driver a Input-side lead-out wiring

Claims (3)

A display unit having a pixel at an intersection of a plurality of common electrodes and a plurality of segment electrodes, and a terminal connection unit in which a common driver is disposed,
The display section is divided into a first display area and a second display area in the common electrode arrangement direction, and each display area is driven by an individual segment driver,
The output terminal of the common driver and the common electrode of the first display area are connected at the terminal connection portion,
The display panel, wherein an output terminal of the common driver and a common electrode of the second display region are connected to each other via a transfer portion in the terminal connection portion. A display unit having a pixel at an intersection of a plurality of common electrodes and a plurality of segment electrodes; a terminal connection unit in which a common driver is disposed; and an outer peripheral edge that faces the terminal connection unit via the display unit; The display unit is divided into a first display area and a second display area in the common electrode arrangement direction, and each display area is driven by an individual segment driver,
The output terminal of the common driver and the common electrode of the first display area are connected by the terminal connection portion,
The display panel, wherein the common electrode of the first display region and the common electrode of the second display region are connected at the outer peripheral edge. The display panel according to claim 2,
The display panel, wherein the common electrode of the first display region and the common electrode of the second display region are connected via a transfer portion at the outer peripheral edge.

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