JPH05313130A - Liquid crystal display device equipped with input device - Google Patents

Abstract

PURPOSE:To provide the liquid crystal device equipped with the input device which is inexpensive and advantageous in space by connecting the lateral electrodes of a liquid crystal panel and the lateral electrodes of the input device in common. CONSTITUTION:The lateral electrodes of the liquid crystal panel 1 are scanned by the output of a common Y-TAB 3. The lateral electrodes of the input device 2, on the other hand, are scanned by the output similar to the output of the common Y-TAB 3. The common Y-TAB 3 is equipped with a press-fit part A11 and a press-fit part B12; and the press-fit part A11 is connected to the liquid crystal panel and the press-fit part B12 is connected to the input device 1 by press-fitting to supply the same common signal to the liquid crystal panel 1 and input device 2. Stress applied to the press-fit part A11 is eliminated by forming a slit 13 nearby the press-fit part A11. Consequently, no unnecessary circuit needs to be mounted and the number of components is decreased to obtain the liquid crystal device which is inexpensive.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device in which a liquid crystal panel and an input device for inputting coordinates are integrated.

[0002]

2. Description of the Related Art In a conventional liquid crystal display device, as shown in FIG. 5, a liquid crystal panel 1 and an input device 2 are formed independently, and each drive circuit is equipped with an independent one. The liquid crystal panel 1 is Y which gives a signal to the horizontal electrodes.
-TAB (TAPE AUTOMATED BONDI
NG) 7 and X-TAB 4 which gives a signal to the vertical electrodes. The coordinates input by the pen input to the input device 2 are Y heat seals 1 that convey the vertical position.
It is detected by the coordinate detection circuit through the X heat seal 5 which transmits 0 and the position in the lateral direction. In this figure, the input device 2
Is a capacitive coupling method, but another general method is an electromagnetic induction method.

[0003]

However, in the liquid crystal display device provided with the input device according to the above-mentioned prior art, the liquid crystal panel and the input device are respectively formed with electrodes in a matrix shape, and drivers and the like having similar functions are provided. It was expensive because it was equipped with. In addition, there is a drawback that the space becomes large.

In order to solve the above-mentioned drawbacks, the present invention uses a common electrode of a liquid crystal panel and a Y electrode of an input device in common, and the purpose thereof is to provide an inexpensive and space-saving input device. Another object of the present invention is to provide a liquid crystal display device.

[0005]

A liquid crystal display device equipped with an input device according to the present invention is such that a plurality of transparent electrodes are formed on each of two transparent substrates sandwiching an insulating layer, and the transparent electrodes are orthogonal to each other. A liquid crystal display device including a device and a circuit for detecting input coordinates is characterized in that the horizontal electrodes of the liquid crystal panel and the horizontal electrodes of the input device are connected in common.

[0006]

【Example】

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 is a diagram of a first embodiment of the present invention, and FIG. 2 is a diagram of a shared Y-TAB 3 of a first embodiment of the present invention.

The horizontal electrodes (hereinafter referred to as common electrodes) of the liquid crystal panel 1 in the first embodiment are scanned by the output of the shared Y-TAB 3 having a driver. On the other hand, the horizontal electrodes of the input device 2 (hereinafter referred to as Y electrodes) are shared Y- electrodes.
It is scanned by an output similar to the output of TAB3.

As shown in FIG. 2, the shared Y-TAB3 is equipped with a crimping portion A11 and a crimping portion B12, and the crimping portion A11 is provided.
The same common signal can be applied to the liquid crystal panel 1 and the input device 2 by pressure-bonding the liquid crystal panel to the liquid crystal panel and connecting the pressure bonding portion B12 to the input device 2. Crimp part A11
The stress applied to the slit 13
It can be solved by providing.

The number of outputs of the shared TAB 3 is 100, and 20
In order to display the 0-line liquid crystal panel 1, two shared Y-TABs 3 for driving both the liquid crystal panel 1 and the input device 2 may be provided.

The period for displaying the liquid crystal panel 1 and the input device 2
The period for detecting the coordinates is controlled in a time-division manner as is apparent from Japanese Patent Laid-Open No. 2-255911.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG.
Will be explained. In this embodiment, the common terminals of the liquid crystal panel 1 are provided on both left and right sides in comparison with the first embodiment, the common terminal on the left side is equipped with a normal Y-TAB 7, and the common terminal on the right side is provided via the common electrode of the liquid crystal panel. Outputs the same signal as the left common terminal. The common terminal on the right side is connected to the input device 2 via the connection Y heat seal 8.
According to this embodiment, it is not necessary to perform a new shared Y-TAB, and highly reliable pressure bonding can be performed.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIG.
Will be explained. This embodiment is different from the input device 2 of the above-described first and second embodiments in that only one glass forming the Y electrode pattern is deleted and only one glass input device 9 forming the X electrode is used. Composed. Single glass input device 9
The common Y-electrode of the liquid crystal panel 1 is shared, and the time-division control is performed as in the first and second embodiments.
The display of the liquid crystal panel 1 and the coordinates of the input device 9 can be detected. This embodiment is 1 in comparison with Embodiments 1 and 2.
Since the Y electrode of the single glass input device 9 is shared with the common electrode of the liquid crystal panel 1, one glass is not required in addition to a wasteful circuit, which further reduces the cost. Further, the thickness of 1.1 mm of one piece of glass can be thinned, and the weight can be reduced. Further, since the common electrode is commonly used, when the single glass input device 9 is mounted on the liquid crystal panel 1, the positioning becomes easy and the assembling property is remarkably improved.

[0013]

As described above, according to the present invention, since the common input of the liquid crystal panel and the input device can be made common, it is not necessary to equip an unnecessary circuit, the number of parts can be reduced, and the cost is low. A liquid crystal display device can be provided. Further, it has an excellent effect that it can be a liquid crystal display device provided with an input device which is compact in terms of space.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a common Y-TAB used in Example 1 of the present invention.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 4 is a diagram showing Embodiment 3 of the present invention.

FIG. 5 is a diagram showing a liquid crystal display device including a conventional input device.

[Explanation of symbols]

 1. Liquid crystal panel 2. Input device 3. Shared Y-TAB 4. X-TAB 5. X heat seal 6. Liquid crystal panel with common terminals on both sides 7. Y-TAB 8. Connection Y heat seal 9.1 glass input device 10. Y heat seal 11. Crimping part A 12. Crimping part B 13. slit

Claims (1)

[Claims] 1. A liquid crystal display device comprising a plurality of transparent electrodes respectively formed on two transparent substrates sandwiching an insulating layer, the liquid crystal display device comprising an input device and a circuit for detecting input coordinates which are orthogonal to each other. A liquid crystal display device comprising an input device, wherein the horizontal electrodes of the panel and the horizontal electrodes of the input device are commonly connected.