JP2764398B2 - LCD panel with driver - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure of a liquid crystal panel with a built-in driver. [Prior art] If an insulated gate MOS transistor or a thin film transistor is used as a switching element of an active matrix substrate, it is possible to incorporate a drive circuit on the same substrate, and there is an advantage that peripheral mounting becomes easy. . FIG. 2 is a schematic view of an active matrix substrate with a built-in driver for a liquid crystal display, which is composed of thin-film transistors and peripheral driving circuits arranged in a matrix on an insulating substrate. ₁ (G 1 ~Gm), the gate line which is a timing diagram, 2 (S ₁ ~Sr) is a source line to be a data line, writing data to the pixel electrodes 4 by the thin film transistors 3 disposed in the intersection In. Reference numeral 5 denotes a timing line driving circuit, and reference numeral 6 denotes a data line driving circuit. This figure shows a case of both-side driving. FIG. 3 is a schematic sectional view (a) and a plan view (b) of a conventional liquid crystal panel with a built-in driver. The active matrix substrate includes a panel display area 8 including thin film transistors, wiring, and pixel electrodes, a timing line driving circuit 5 for driving the timing lines 1, and a data line 2 on an insulating substrate 7.
And a peripheral connection terminal 9 are formed. In the counter electrode substrate, a counter electrode 11 is formed on an insulating counter substrate 10. After the alignment treatment of both substrates, a sealant 13 for enclosing the liquid crystal 12 is pattern-printed on the counter substrate side to combine the two substrates, and then the liquid crystal is injected through the sealing port 14, whereby a liquid crystal panel is completed. Since the peripheral drive circuit is exposed to the external atmosphere, it is necessary to form the passivation film 15 in advance or apply resin molding or the like after the panel is completed to protect the peripheral drive circuit from moisture. [Problems to be Solved by the Invention] However, in the above-described conventional technology, the moisture resistance protection of the peripheral drive circuit is incomplete when there is unevenness in the thickness of the resin mold, and scratches and the like are also found on the resin mold. When mechanical stress is applied, there is also a problem that element destruction occurs, so that careful handling is required. Therefore, the present invention solves such a problem,
An object of the present invention is to provide a structure of a liquid crystal panel with a built-in driver that can sufficiently protect a peripheral driving circuit from moisture and mechanical stress. [Means for Solving the Problems] According to the present invention, a liquid crystal is sandwiched between a pair of substrates, and one of the substrates has data lines and timing lines arranged in a matrix, A plurality of switching elements connected to the timing line, a pixel region including a pixel electrode connected to the switching element, and at least one of the data line and the timing line driven around the pixel region on the one substrate. In a liquid crystal panel with a built-in driver in which a driving circuit is arranged, the inner surface and the outer surface of the other substrate are flat surfaces having no protrusion, and the other substrate is extended to cover the driving circuit. A molding material is formed between the pair of substrates so as to surround the pixel region and the driving circuit and along all sides of the other substrate. [Operation] According to the above configuration of the present invention, the peripheral drive circuit on the active matrix substrate with a built-in driver is protected from mechanical stress (scratch, damage, etc.) by the counter electrode substrate, and sufficient resin By filling the space between the substrates or covering the periphery, stable and uniform moisture resistance can be maintained. FIG. 1 is a schematic sectional view (a) and a plan view (b) of a liquid crystal panel with a built-in driver showing an embodiment of the present invention. Third
The difference from the conventional example shown in the figure is that a counter electrode substrate having a counter electrode 11 on a counter substrate 10 is extended to above the timing line drive circuit 5 and the data line drive circuit 6, and the peripheral drive circuit is subjected to mechanical stress. In that it is protected from Further, by molding the periphery with the resin 16, the moisture resistance of the peripheral drive circuit is also improved. The resin 16 may have a two-layer structure in which a low-viscosity resin is filled in the cavity 17 on the peripheral drive circuit and the periphery is covered with a resin having a higher viscosity. As the active matrix substrate, if a transparent substrate is used as an insulating substrate as shown in this embodiment, a transmissive liquid crystal panel using a thin film transistor can be realized, and if an opaque semiconductor substrate is used, a reflection using a MOS transistor can be used. Type liquid crystal panels are also possible. [Effects of the Invention] As described above, the present invention has the following effects. First, since the peripheral drive circuit is covered with the counter electrode substrate, the element portion is not damaged or stained, and handling is easy and reliability is improved. Secondly, since the peripheral resin mold can be made large and uniform, the moisture resistance is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 (a) and 1 (b) are a schematic sectional view (a) and a plan view (b) of a liquid crystal panel with a built-in driver showing an embodiment of the present invention. FIG. 2 is a schematic circuit diagram of an active matrix substrate with a built-in driver. 3 (a) and 3 (b) are a schematic sectional view (a) and a plan view (b) of a conventional liquid crystal panel with a built-in driver. DESCRIPTION OF SYMBOLS 1 ... Timing line (gate line) 2 ... Data line (source line) 3 ... Thin film transistor 4 ... Pixel electrode 5 ... Timing line drive circuit 6 ... Data line drive circuit 7 ... Insulating substrate 8 ... ... Panel display area 9 ... Peripheral connection terminal 10 ... Counter substrate 11 ... Counter electrode 12 ... Liquid crystal 13 ... Sealant 14 ... Encapsulation opening 15 ... Passivation 16 ... Resin 17 ... Cave portion

Claims (1)

(57) [Claims] A liquid crystal is sandwiched between a pair of substrates, and one of the substrates has data lines and timing lines arranged in a matrix, a plurality of switching elements connected to the data lines and the timing lines, and A pixel region including a pixel electrode connected to an element, and a driver built-in liquid crystal panel in which a driving circuit for driving at least one of the data line and the timing line is arranged around the pixel region on the one substrate; The inner surface and the outer surface of the other substrate are flat surfaces without protrusions, and the other substrate is extended so as to cover the driving circuit, and surrounds the pixel region and the driving circuit. A liquid crystal panel with a built-in driver, wherein a molding material is formed between the pair of substrates so as to extend along all sides of the other substrate.