TW583445B - Panel current (charge) leakage balancing device for display - Google Patents

Abstract

The present invention provides a panel current (charge) leakage balancing device for display, which can effectively counteract the current leakage, and charge leakage caused by the parasitic capacitance between the display and the backlight module (large and small size of bulletin board or advertising light box only with backlight module), so that the imbalance effect of the current flowing through each set of light bulbs caused by the current leakage can be eliminated, thereby keeping consistent light source from the light bulbs, and achieving widely uniform brightness for the panel.

Description

583445 5. Description of the invention (l) [Technology of the invention The present invention relates to the installation of, especially, a type of extinguishable tube and an external metal cover [prior art] Projection light source in general display backlight, and 1 / RS 2 is the main line resistance The equivalent stray capacitance is either due to the position of the mechanism, or is balanced. Among them, the R x i resistance, because of the backlight tube, so the stray parasitic effects are kept balanced. Due to the imbalance of the components, the health of the visual appearance of the panel is balanced or uneven due to a long time. Therefore, the author finally solved the problem after verifying it with a multiple harmonic synthesis. [Content of the invention]

And C c 2 is the field of the lamp]: a type of display panel leakage current. In addition to neutralization or balance, it remains in the second power: f charge between the structures. Put it on the display panel module, put it on, and use the liquid crystal display as a group of lamps, r. ^

r ^ ~ into (refer to Figure 1) R in i

(Not necessarily equivalent) ^ ^ Ύ R due to production factors 2, η: Ci in most cases, C2 is not KK 2, then the stray equivalent capacitor 2 uses high-frequency and high-voltage power supply reflux The device ’s net effect circuit becomes complicated, and it is not easy to distribute flatly, which causes the lamp current flowing through L1, L2, and the tube current flowing through it is also different or uneven. The overall brightness and grayscale are different. In terms of performance, it creates a dislike, which not only affects the picture quality performance of the display, but also has a certain impact on people. There is no way to effectively solve this problem. After years of hard work and thinking in related work, the technique of signal finally came to fruition, and this device was created to solve this problem that has been troubled for many years. The purpose is to solve the above-mentioned traditional defects and avoid them

Page 6 V. Description of the invention (2) In the present invention, a waveform signal generating device can be used to counterbalance the leakage current and leakage charge remaining on the plate. The number generator. τ 7-The wave letter of flying ten balances to achieve the above-mentioned purpose. The device used in the present invention is a jelly, a pot puller 2 f connecting piece on the outside of the display panel module. The second and second pieces can be located on the display panel. The electric charge is as clear as the [embodiment]. For the detailed content and technical description of the present invention, the diagrams with the illustrations = "'is the display and backlight mode device of the present invention, which can effectively neutralize the display and backlight. The purpose current of the module, due to the unbalanced current source of the leakage current, makes the panel have a wide range of fans. The purpose of the department is to connect the plastic material class 4 of the shape of the display panel 20. Yes-'generated ;, package: Yes. Two devices 2 can be used as leakage current, leakage charge balance super i: etc. ί: No. 2 calculation function circuit 21,-waveform production: battery or direct injection) 2 :; ί: light Switching element (capacitor, transformer, 583445

V. Description of the invention (3) First, the soil before the imbalance is obtained by Si ◦ The unbalanced leakage current, because the driving of the lighting q + 1 1C2 ten 1C ······ The output is a high-frequency digital predicator (transformer ) The equivalent output resistance of the output of 30 is two = η) The upper two is this / on the muscle or the invasive pressure, and the voltage is different because of icl, ic22, 3 times each, and * 4, the balance of electricity. There is even a 3 phase shift difference between the amplitude and the original signal. That is, a low-frequency parasitic or leaking circuit is input to the signal calculation function circuit 21, the level 2 ,; Ι; the generator's initial potential is. v, at this time si because of the non-waveform, the circuit is continuously boosted, the controlled voltage is added to increase, and the signal of the staff is input. When the input control voltage is continued, the output frequency of the device 2 will gradually increase until it is "frequency". The value-causes the difference and the input lighting frequency ㈤ ^ to be injected into the turn;;: r load produces φ on the job, where Γ i belongs to the leakage current of the cover structure 1 and the leakage current 2 ', so that the signal of S1 gradually approaches Zero (and the phasor of the balance signal of the metal cover structure 1 of the branch and VUC2, *, because the neutralization or removal of the frequency wheel 2 and the balance of the second wheel and the leakage, respectively, make the The signal will reach a certain number of loops:? 'Reach the minimum value' At this time, the signal calculation function is to take the Si low, and fix the output control voltage to

5. Description of the invention on page 8 (4) The VAC signal rate is maintained to maintain Si ... Parasitic spurs due to the flow through this device make the lamp 3 greatly improve the entire display. Please refer to the "moving embodiment" And as shown in the figure: the metal cover structure 15, if this cross-linked element is the same as the capacitor LOW ESR (see the "Embodiment and the equivalent for the equivalent, the waveform letter 1 or the middle layer rate of the waveform generation device style, Amplitude, but as a function of the waveform, the capacitance Ci offset at the lowest component is produced. This type of display device 2 or the middleware 5 can be connected to connect the third part of the electrical circuit to the other, 6 This number of injected plastic material is best to offset the above-mentioned approximate layer of plastic material as a capacitor, which is subject to capacitor capacitance). 4: Shown in the diagram. If only the cross-linking device can provide (waveform signal material 4 〇) multi-phase, multi-flow capacitor (^ The output of 2 is always following a certain _ reference frequency point, that is, maintaining the entire capacitor q + C2 + C at The state of being neutralized or balanced. The leakage current and leakage charge of parasitic stray elements such as daggers and daggers will not interfere with the current flow through the main tube 3 and 4 and thus maintain an average and balanced state. ❺The results of brightness and gray scale are shown in the figure of the troubles and significant quality defects for many years. It is a schematic diagram of the passive embodiment of the present invention. The difference is that the external type 40 is connected with a cross-linked component inductor. And transformer, this magnitude and positive and negative effects, and 'is shown in the first active diagram of the present invention: This embodiment is connected to the above-mentioned element 5 with a neutral signal gain and a large current, in order to fix the Injected into the external metal cover structure, although this signal is a more complex combination of fixed frequency and multi-amplitude, the leakage of C2 temple parasitic stray components

583445 5. Description of the invention (5) Current and leakage charge. Please refer to "shown in Figs. 5 and 6'7", which is the second embodiment of the present invention, the embodiment of the formula, and the schematic diagram of the actual block and operation flow. As shown in the figure: The example is substantially the same as the above, except that the waveform synthesizing module 7 and the branch group 8 are connected between the cross-linking element 5 and the f J structure 1. The above two modules' send a scan frequency (generated by the DAC) 'at startup. ^ Then the ADC reads the signal value 丄 〇, and then judges to find the read value: Low point 1 1' If it is not the lowest point, return In step 9, if it is the lowest value :: ^, the signal waveform i 2 is maintained, and then the waveform data is sent to ci 3, and the signal waveform 1 4 is output; or it is judged whether the read-back value drifts i, and the right is not, then return To the maintenance signal waveform i 2; if it is, after the signal waveform 16, return to the maintenance signal waveform: 2 middle] > Turn-out: Refer to “shown in FIG. 8”, which is the front end note of the present invention =: figure. As shown in the figure: in this embodiment, a first switch " and a second switch J may be directly connected between the display panel 2 0: 钿 and the inverter 3 0. The second switch i 8 is sequentially connected as mentioned above. The intersection of j-shaped generating device 6 'the aforementioned first and second switches " I, 8 may be M0S of the pressure switching element, or other active and passive elements, and is composed of time division type (or phase separation type), The charge remaining at the seed 20 is excluded or neutralized or balanced. 'The above are merely preferred embodiments of the present invention, and are not intended to be used in the scope of the invention. That is to say, all the changes and modifications of the patent application in accordance with the present invention are covered by the scope of the invention patent. Parity

583445 Brief description of the drawings [Simple description of the drawings] FIG. 1 is a schematic diagram showing an equivalent connection between the display and the backlight module of the present invention. Figures 2-1 are schematic diagrams of the passive embodiment of the present invention. Fig. 2-2 are schematic diagrams of another passive embodiment of Fig. 2-1. FIG. 3 is a schematic diagram of a first active embodiment of the present invention. Figure 4 is a schematic diagram of the actual circuit of Figure 3. FIG. 5 is a schematic diagram of a second active embodiment of the present invention. Figure 6 is a block diagram of the actual circuit of Figure 5. Figure 7 is a schematic diagram of the operation flow of Figure 5. FIG. 8 is a schematic diagram of a front-end injection type embodiment of the present invention. [Illustration of Graphical Symbols] Display Panel .................. 20 External Metal Cover Structure..1 Waveform Signal generation device ... 2 Signal calculation function circuit ......... 21 Waveform generation circuit equivalent (rms mean square) (Root) Frequency ..... 22 Output impedance of the signal generation circuit ......... 23 Balanced signal injection into the coupling element ......... 24 ............ 30 Lamps ............ 3, 4 Cross-linked components. ... 5 Neutralization signal waveform generation device

Page 583445 The diagram briefly explains the waveform synthesis module ........ Waveform analysis module ........ Send a scan frequency (generated by the DAC) Read the signal value by the ADC ..... Find the lowest point of the read-back value ... Maintain the signal waveform ... Send the waveform data to the DAC .... Send the signal waveform ... Whether the read-back value drifts ... .. Correct the output signal waveform ..... First switch ......... Second switch ......... Middle layer plastic material ...

78 1 2 4 5 6 7 8 0 9 0 3 IX is IX IX IX

Page 12

Claims (1)

583445 6. Patent application f1. A leakage current (charge) balance device for a display panel, which is used to eliminate or neutralize or balance the charge remaining between the lamp tube and the external metal cover structure of the display panel module. This device is directly connected On the external metal cover structure of the display panel module, a waveform signal can be directly injected onto the external metal cover structure, and the remaining charge on the display panel can be eliminated or neutralized or balanced out. 2, such as the charge), 3, Such as Dutch) flat function returns a wave form of the letter 4, such as Dutch) flatware, electricity 5, such as Dutch) flat 6, such as Dutch) flat 7, such as Dutch) flat 8, such as Dutch) flat interest range as described in item 1 The display panel leakage current (electricity, in which the device may be a waveform signal generating device. The display panel leakage current (electricity, in which the signal generating device includes a signal calculation circuit for generating a waveform, as described in item 2). Equivalent (r ms root mean square) frequency, output impedance of the-sign generation circuit and a balanced signal injection coupling element. Application for a special device. Application for a special device. Application for a special device pool. Any application for a special balance device Electricity, the coupling element can be a capacitor, an inductor, a transformer. The leakage current of the display panel described in item 1 (electricity, the device can be a passive component. The leakage current of the display panel described in item 5 (electricity The passive element is a cross-linked element. The display panel leakage current described in item 6 (electricity, the cross-linked element is a capacitor. The display panel leakage current described in item 1 (electricity, the device may be an active type, In a fixed style Page 13 / 、 The waveform signal injection of the patent application range is a fixed phase, multi-frequency, and multi-amplitude more than two u-frames', but it can be multi-f, such as the δ of the patent application scope;; =. (Ho) A balancing device, in which the active; the panel leakage current (electrically neutralized signal waveform generating device 7 ', a cross-linked component connected to a = synthesis module and a waveform point ;; = = 1 connection Components,-daggers, patents ;; ==; direct display panel leakage current (on the middle layer of the plastic material class. X, "directly connected to the display panel mold 1 2, a display panel leakage current (elimination or neutralization or The balance remains on the display panel j: 'It is used to eliminate the charge between the structures. This device is connected between the external metal cover and the time-smart formula (, eight = the charge on the display panel module and the reflux to be excluded). Or; or or flat: phase-drop type), Qing (black 冇 $ ::: consumes the display panel leakage current balance device described in item 12, wherein 'the device is formed by a first open two = structure: switch connection The connected components and the signal waveform of the neutralization signal produce the display of the paradigm ... of the plate leakage current component, or other main components :: moving element ?: any: structure can :: high voltage ㈣