LIQUID CRYSTAL DISPLAY DETECTING SYSTEM AND A METHOD THEREOF

Abstract

The present invention provides an LCD detecting system including timing control (TCON) IC. The TCON IC includes a process unit to receive lock signal, a detecting control unit connected with the process unit, and a point-to-point transmission unit connected with the detecting control unit. The detecting control unit detects mode of the point-to-point transmission unit and sends a control signal to the process unit based on a detecting result. The TCON IC transmits timing control signal based on the control signal received by the process unit and starts to transmit normal RGB data. Priority of the control signal transmitted by the detecting control unit is higher than that of the lock signal. The present invention also provides an LCD detecting method. The present invention can increase the speed of detecting and time to market, enhance competitiveness, increase the speed of manufacturing analysis, saves working time and productivity, and reduces cost.

Claims

1. A liquid crystal display (LCD) detecting system, comprising: timing control (TCON) IC, comprising: a process unit to receive lock signal; a detecting control unit connected with the process unit; and a point-to-point transmission unit connected with the detecting control unit; wherein the detecting control unit detects mode of the point-to-point transmission unit to judge whether all driver ICs can normally lock clock signal accordingly, time of the TCON IC performing clock training is compared with a predetermined value to produce a detecting result, and sends a control signal to the process unit; wherein the process unit makes the TCON IC to transmit timing control signal based on the received control signal and starts to transmit normal RGB data to the LCD displaying unit; wherein priority of the control signal transmitted by the detecting control unit is higher than that of the lock signal.

2. The LCD detecting system of claim 1, wherein the detecting control unit is a timer, and the timer times when the TCON IC performs clock training.

3. The LCD detecting system of claim 2, wherein when the timer finds time of clock training is larger than predetermined time, the timer sends control signal of over the predetermined time to the process unit, and when the process unit receives the over-time signal sent by the timer, it forces the TCON IC to transmit timing control signal and normal RGB data.

4. The LCD detecting system of claim 1, wherein the detecting control unit is a timer, and the timer times when the TCON IC performs clock training.

5. The LCD detecting system of claim 4, wherein when the timer finds time of clock training is larger than predetermined cycle, the timer sends control signal of over the predetermined cycle to the process unit, and when the process unit receives the over-time signal sent by the timer, it forces the TCON IC to transmit timing control signal and normal RGB data.

6. An LCD detecting method comprising: performing clock training by a TCON IC; judging whether all driver ICs can normally lock clock signal and sending a control signal to the process unit based on a detecting result that time of the TCON IC performing clock training is compared with a predetermined value; transmitting timing control signal by the TCON IC; and transmitting normal RGB data by the TCON IC.

7. The LCD detecting method of claim 6, wherein the detecting control unit is a timer, and the timer times when the TCON IC performs clock training.

8. The LCD detecting method of claim 7, wherein when the timer finds time of clock training is larger than predetermined time, the timer sends control signal of over the predetermined time to the process unit, and when the process unit receives the over-time signal sent by the timer, it forces the TCON IC to transmit timing control signal and normal RGB data.

9. The LCD detecting method of claim 1, wherein the detecting control unit is a timer, and the timer times when the TCON IC performs clock training.

10. The LCD detecting method of claim 4, wherein when the timer finds time of clock training is larger than predetermined cycle, the timer sends control signal of over the predetermined cycle to the process unit, and when the process unit receives the over-time signal sent by the timer, it forces the TCON IC to transmit timing control signal and normal RGB data.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are included to provide easy understanding of the application, are incorporated herein and constitute a part of this specification. The drawings illustrate embodiments of the application and, together with the description, serve to illustrate the principles of the application.

[0021] FIG. 1 is a conventional time diagram of point-to-point signal.

[0022] FIG. 2 is a schematic diagram of a conventional panel topology.

[0023] FIG. 3 is a flow chart of a point-to-point transmission of a conventional LCD.

[0024] FIG. 4 is a schematic diagram of LCD detecting system in accordance with an embodiment of the present invention.

[0025] FIG. 5 is a schematic diagram of LCD detecting system in accordance with another embodiment of the present invention.

[0026] FIG. 6 is a schematic diagram of LCD detecting system in accordance with another embodiment of the present invention.

[0027] FIG. 7 is a flow chart of LCD detecting method in accordance with an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] To better and concisely explain the disclosure, the same name or the same reference number given or appeared in different paragraphs or figures along the specification should has the same or equivalent meanings while it is once defined anywhere of the disclosure.

[0029] FIG. 4 is a schematic diagram of a liquid crystal display (LCD) detecting system in accordance with an embodiment of the present invention. The LCD detecting system includes timing control (TCON) IC. The TCON IC includes a process unit to receive lock signal, a detecting control unit connected with the process unit, and a point-to-point transmission unit connected with the detecting control unit.

[0030] The detecting control unit detects mode of the point-to-point transmission unit and sends a control signal to the process unit based on a detecting result. The TCON IC transmits timing control signal based on the control signal received by the process unit and starts to transmit normal RGB data. Priority of the control signal transmitted by the detecting control unit is higher than that of the lock signal.

[0031] Referring to FIG. 5 which is a schematic diagram of LCD detecting system in accordance with an embodiment of the present invention, the detecting control unit is a timer detecting mode of the point-to-point transmission unit. When TCON IC enters phase I and performs clock training, the timer times. When the timer finds time of clock training is larger than predetermined time T, the timer sends control signal of over the predetermined time to the process unit. When the process unit receives the over-time signal sent by the timer, it forces TCON IC to enter phase II and phase III. That is, it transmits timing control signal and normal RGB data. Driver IC normally locking clock signal can normally receive the data signal sent by the TCON IC. LCD displays well except a region including the driver IC which cannot normally lock clock signal.

[0032] Referring to FIG. 6 which is a schematic diagram of LCD detecting system in accordance with another embodiment of the present invention, the detecting control unit is a timer detecting mode of the point-to-point transmission unit. When TCON IC enters phase I and performs clock training, the timer times. When the timer finds time of clock training is larger than predetermined cycle N, the timer sends control signal of over the predetermined cycle to the process unit. When the process unit receives the control signal sent by the timer, it forces TCON IC to enter phase II and phase III. That is, it transmits timing control signal and normal RGB data. Driver IC normally locking clock signal can normally receive the data signal sent by the TCON IC. LCD displays well except a region including the driver IC which cannot normally lock clock signal.

[0033] Referring to FIG. 7, FIG. 7 is a flow chart of LCD detecting method in accordance with an embodiment of the present invention. The LCD detecting method includes the following steps:

[0034] Step 1, TCON IC enters phase I and performs clock training.

[0035] Step 2, judging whether all driver ICs can normally lock clock signal. If driver IC can, the lock signal is at high level and it goes to next step. If driver IC cannot, it transfer to Step land continues clock training When time of clock training is larger than predetermined time T or predetermined cycle N, TCON IC does not process lock signal and goes to next step directly.

[0036] Step 3, TCON IC enters phase II and transmits timing control signal.

[0037] Step 4, TCON IC enters phase III and transmits normal RGB data.

[0038] The LCD detecting system and method thereof change the flow of point-to-point transmission and avoid a status that entire LCD fails. They increase the speed of detecting, decrease the time of manufacturing analysis, save working time and productivity, reduce cost, and enhance competitiveness.

[0039] It will be apparent to those having ordinary skill in the art that various modifications and variations can be made to the devices in accordance with the present disclosure without departing from the scope or spirit of the disclosure. In view of the foregoing, it is intended that the present disclosure covers modifications and variations of this disclosure provided they fall within the scope of the following claims and their equivalents.